{
 "documentInfo": {
  "documentType": "https://xbrl.org/CR/2021-02-03/xbrl-json",
  "features": {
   "xbrl:canonicalValues": true
  },
  "namespaces": {
   "bekb": "http://www.bekaert.com/xbrl/2020",
   "ifrs-full": "http://xbrl.ifrs.org/taxonomy/2020-03-16/ifrs-full",
   "iso4217": "http://www.xbrl.org/2003/iso4217",
   "scheme": "http://standards.iso.org/iso/17442",
   "xbrl": "https://xbrl.org/CR/2021-02-03",
   "xbrli": "http://www.xbrl.org/2003/instance"
  },
  "linkTypes": {
   "ftTyp_fact-footnote": "http://www.xbrl.org/2003/arcrole/fact-footnote"
  },
  "linkGroups": {
   "ftGrp_default": "http://www.xbrl.org/2003/role/link"
  },
  "taxonomy": [
   "http://www.bekaert.com/xbrl/2020/5493008SR6XZECH6BN71-2020-12-31.xsd"
  ]
 },
 "facts": {
  "Tag1": {
   "value": "4322450000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Revenue",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag2": {
   "value": "3772374000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Revenue",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag3": {
   "value": "3795320000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CostOfSales",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag4": {
   "value": "3214056000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CostOfSales",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag5": {
   "value": "527131000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:GrossProfit",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag6": {
   "value": "558318000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:GrossProfit",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag7": {
   "value": "188606000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:SellingExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag8": {
   "value": "167141000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:SellingExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag9": {
   "value": "127676000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:AdministrativeExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag10": {
   "value": "133526000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:AdministrativeExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag11": {
   "value": "70729000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ResearchAndDevelopmentExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag12": {
   "value": "52361000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ResearchAndDevelopmentExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag13": {
   "value": "27655000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag14": {
   "value": "84659000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag16": {
   "value": "12758000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherExpenseByFunction",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag15": {
   "value": "33422000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherExpenseByFunction",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag17": {
   "value": "155017000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossFromOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag18": {
   "value": "256527000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossFromOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag19": {
   "value": "241909000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:EarningsBeforeInterestAndTaxesUnderlying",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag20": {
   "value": "272244000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:EarningsBeforeInterestAndTaxesUnderlying",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag21": {
   "value": "86891000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:OneOffItems",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag22": {
   "value": "15717000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:OneOffItems",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag23": {
   "value": "2841000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RevenueFromInterest",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag24": {
   "value": "3386000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RevenueFromInterest",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag25": {
   "value": "69166000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:InterestExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag26": {
   "value": "59554000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:InterestExpense",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag27": {
   "value": "-18371000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherFinanceIncomeCost",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag28": {
   "value": "-30165000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherFinanceIncomeCost",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag30": {
   "value": "70322000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossBeforeTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag29": {
   "value": "170194000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossBeforeTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag31": {
   "value": "51081000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncomeTaxExpenseContinuingOperations",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag32": {
   "value": "56513000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncomeTaxExpenseContinuingOperations",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag33": {
   "value": "19241000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ResultAfterTaxesConsolidatedCompanies",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag34": {
   "value": "113682000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ResultAfterTaxesConsolidatedCompanies",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag36": {
   "value": "28959000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag35": {
   "value": "34355000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag37": {
   "value": "48200000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag38": {
   "value": "148037000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag39": {
   "value": "41329000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossAttributableToOwnersOfParent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag40": {
   "value": "134687000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossAttributableToOwnersOfParent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag41": {
   "value": "6871000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossAttributableToNoncontrollingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag42": {
   "value": "13350000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossAttributableToNoncontrollingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag43": {
   "value": "0.731",
   "decimals": 3,
   "dimensions": {
    "concept": "ifrs-full:BasicEarningsLossPerShare",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR/xbrli:shares"
   }
  },
  "Tag44": {
   "value": "2.382",
   "decimals": 3,
   "dimensions": {
    "concept": "ifrs-full:BasicEarningsLossPerShare",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR/xbrli:shares"
   }
  },
  "Tag45": {
   "value": "0.73",
   "decimals": 3,
   "dimensions": {
    "concept": "ifrs-full:DilutedEarningsLossPerShare",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR/xbrli:shares"
   }
  },
  "Tag46": {
   "value": "2.266",
   "decimals": 3,
   "dimensions": {
    "concept": "ifrs-full:DilutedEarningsLossPerShare",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR/xbrli:shares"
   }
  },
  "Tag47": {
   "value": "48200000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag57": {
   "value": "148037000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag48": {
   "value": "16563000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:GainsLossesOnExchangeDifferencesArisingDuringPeriodOnSubsidiariesNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag69": {
   "value": "-80879000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:GainsLossesOnExchangeDifferencesArisingDuringPeriodOnSubsidiariesNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag68": {
   "value": "-2171000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:GainsLossesOnExchangeDifferencesArisingDuringPeriodOnJointVenturesAndAssociatesNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag70": {
   "value": "-38134000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:GainsLossesOnExchangeDifferencesArisingDuringPeriodOnJointVenturesAndAssociatesNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag49": {
   "value": "14392000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag72": {
   "value": "-119013000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag67": {
   "value": "-833000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag58": {
   "value": "2497000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag50": {
   "value": "2372000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag59": {
   "value": "250000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag51": {
   "value": "11000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag60": {
   "value": "4000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag66": {
   "value": "-1822000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag61": {
   "value": "1024000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag52": {
   "value": "3372000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag62": {
   "value": "1727000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag53": {
   "value": "17764000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag71": {
   "value": "-117286000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag54": {
   "value": "65964000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag63": {
   "value": "30751000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag55": {
   "value": "62506000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag64": {
   "value": "23233000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag56": {
   "value": "3458000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag65": {
   "value": "7518000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag73": {
   "value": "60266000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IntangibleAssetsOtherThanGoodwill",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag91": {
   "value": "54664000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IntangibleAssetsOtherThanGoodwill",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag74": {
   "value": "149784000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Goodwill",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag92": {
   "value": "149398000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Goodwill",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag75": {
   "value": "1349657000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:PropertyPlantAndEquipment",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag93": {
   "value": "1191781000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:PropertyPlantAndEquipment",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag76": {
   "value": "149051000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RightofuseAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag94": {
   "value": "132607000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RightofuseAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag77": {
   "value": "160665000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:InvestmentAccountedForUsingEquityMethod",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag95": {
   "value": "123981000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:InvestmentAccountedForUsingEquityMethod",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag78": {
   "value": "36281000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherNoncurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag96": {
   "value": "45830000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherNoncurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag79": {
   "value": "142333000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DeferredTaxAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag97": {
   "value": "124243000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DeferredTaxAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag80": {
   "value": "2048037000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag98": {
   "value": "1822503000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag81": {
   "value": "783030000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Inventories",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag99": {
   "value": "683477000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Inventories",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag82": {
   "value": "59904000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:BillsOfExchangeReceived",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag100": {
   "value": "54039000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:BillsOfExchangeReceived",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag83": {
   "value": "644908000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:CurrentTradeReceivablesExcludingBillsOfExchangeReceived",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag101": {
   "value": "587619000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:CurrentTradeReceivablesExcludingBillsOfExchangeReceived",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag84": {
   "value": "111615000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherCurrentReceivables",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag102": {
   "value": "101330000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherCurrentReceivables",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag85": {
   "value": "50039000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag103": {
   "value": "50077000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag86": {
   "value": "566176000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag104": {
   "value": "940416000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag87": {
   "value": "40510000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherCurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag105": {
   "value": "41898000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherCurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag88": {
   "value": "466000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag106": {
   "value": "6740000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSale",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag89": {
   "value": "2256647000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag107": {
   "value": "2465597000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentAssets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag90": {
   "value": "4304684000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Assets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag108": {
   "value": "4288100000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Assets",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag109": {
   "value": "177793000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IssuedCapital",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag129": {
   "value": "177812000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IssuedCapital",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag110": {
   "value": "37751000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:SharePremium",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag130": {
   "value": "37884000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:SharePremium",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag111": {
   "value": "1492028000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RetainedEarnings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag131": {
   "value": "1614781000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RetainedEarnings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag149": {
   "value": "107463000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:TreasuryShares",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag151": {
   "value": "106148000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:TreasuryShares",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag150": {
   "value": "-165000000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:OtherReserve",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag152": {
   "value": "-276448000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:OtherReserve",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag112": {
   "value": "1435110000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:EquityAttributableToOwnersOfParent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag132": {
   "value": "1447880000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:EquityAttributableToOwnersOfParent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag113": {
   "value": "96430000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncontrollingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag133": {
   "value": "87175000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncontrollingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag114": {
   "value": "1531540000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag134": {
   "value": "1535055000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag115": {
   "value": "123409000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentProvisionsForEmployeeBenefits",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag135": {
   "value": "130948000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentProvisionsForEmployeeBenefits",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag116": {
   "value": "25005000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherLongtermProvisions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag136": {
   "value": "25166000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherLongtermProvisions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag117": {
   "value": "1184310000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:LongtermBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag137": {
   "value": "968076000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:LongtermBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag118": {
   "value": "265000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherNoncurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag138": {
   "value": "1231000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherNoncurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag119": {
   "value": "34182000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DeferredTaxLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag139": {
   "value": "38337000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DeferredTaxLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag120": {
   "value": "1367171000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag140": {
   "value": "1163759000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:NoncurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag121": {
   "value": "424184000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag141": {
   "value": "641655000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag122": {
   "value": "652384000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag142": {
   "value": "668422000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag123": {
   "value": "148784000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentProvisionsForEmployeeBenefits",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag143": {
   "value": "149793000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentProvisionsForEmployeeBenefits",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag124": {
   "value": "30222000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherShorttermProvisions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag144": {
   "value": "11421000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherShorttermProvisions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag125": {
   "value": "82411000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentTaxLiabilitiesCurrent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag145": {
   "value": "53543000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentTaxLiabilitiesCurrent",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag126": {
   "value": "67988000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherCurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag146": {
   "value": "64451000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherCurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag153": {
   "value": null,
   "dimensions": {
    "concept": "ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag154": {
   "value": null,
   "dimensions": {
    "concept": "ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag127": {
   "value": "1405973000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag147": {
   "value": "1589286000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CurrentLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag128": {
   "value": "4304684000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:EquityAndLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag148": {
   "value": "4288100000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:EquityAndLiabilities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag224": {
   "value": "177793000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:IssuedCapitalMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag225": {
   "value": "37751000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:SharePremiumMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag226": {
   "value": "1480235000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag329": {
   "value": "-108843000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:TreasurySharesMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag330": {
   "value": "-130102000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag234": {
   "value": "41329000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag238": {
   "value": "11000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag239": {
   "value": "16138000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag248": {
   "value": "-18000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:IncreaseDecreaseThroughReclassifications",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag252": {
   "value": "6973000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1",
      "footnote3"
     ]
    }
   }
  },
  "Tag261": {
   "value": "4390000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag265": {
   "value": "-1341000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag264": {
   "value": "1380000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:TreasurySharesMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag268": {
   "value": "39557000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag277": {
   "value": "177793000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:IssuedCapitalMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag275": {
   "value": "37751000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:SharePremiumMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag273": {
   "value": "1492022000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag331": {
   "value": "-107463000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:TreasurySharesMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag332": {
   "value": "-113964000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag276": {
   "value": "177793000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:IssuedCapitalMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag274": {
   "value": "37751000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:SharePremiumMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag272": {
   "value": "1492022000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag333": {
   "value": "-107463000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:TreasurySharesMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag334": {
   "value": "-113964000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag290": {
   "value": "134687000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag335": {
   "value": "-113858000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag303": {
   "value": "-467000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1",
      "footnote4"
     ]
    }
   }
  },
  "Tag343": {
   "value": "8556000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag317": {
   "value": "19000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IssueOfEquity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:IssuedCapitalMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag316": {
   "value": "133000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IssueOfEquity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:SharePremiumMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag313": {
   "value": "-231000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag312": {
   "value": "1314000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:TreasurySharesMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag306": {
   "value": "19787000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag318": {
   "value": "177812000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:IssuedCapitalMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag319": {
   "value": "37884000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:SharePremiumMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag320": {
   "value": "1614780000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag321": {
   "value": "-106149000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:TreasurySharesMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag322": {
   "value": "-227822000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag340": {
   "value": "0.20",
   "decimals": 2,
   "dimensions": {
    "concept": "ifrs-full:PercentageOfVotingEquityInterestsAcquired",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-03-01T00:00:00",
    "ifrs-full:BusinessCombinationsAxis": "bekb:BekaertSlatinaSRLMember"
   }
  },
  "Tag341": {
   "value": "9000000",
   "decimals": -5,
   "dimensions": {
    "concept": "ifrs-full:ConsiderationPaidReceived",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-02-01T00:00:00/2020-03-01T00:00:00",
    "ifrs-full:BusinessCombinationsAxis": "bekb:BekaertSlatinaSRLMember",
    "unit": "iso4217:EUR"
   }
  },
  "Tag342": {
   "value": "9500000",
   "decimals": -5,
   "dimensions": {
    "concept": "ifrs-full:ConsiderationPaidReceived",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-12-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:BusinessCombinationsAxis": "bekb:BekaertMaccaferriUndergroundSolutionsBVBAMember",
    "unit": "iso4217:EUR"
   }
  },
  "Tag227": {
   "value": "-14489000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstrumentsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag228": {
   "value": "-68267000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag229": {
   "value": "26694000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag230": {
   "value": "-8206000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:ReserveForPutOptionOnNonControllingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag231": {
   "value": "1392566000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag232": {
   "value": "119071000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag233": {
   "value": "1511637000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag235": {
   "value": "41329000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag236": {
   "value": "6871000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag237": {
   "value": "48200000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag240": {
   "value": "2372000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstrumentsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag241": {
   "value": "1244000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag242": {
   "value": "1413000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag243": {
   "value": "21178000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag244": {
   "value": "-3413000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag245": {
   "value": "17765000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag246": {
   "value": "652000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:IncreaseDecreaseThroughCapitalContributionByNonControllingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag247": {
   "value": "652000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:IncreaseDecreaseThroughCapitalContributionByNonControllingInterests",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag249": {
   "value": "18000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:IncreaseDecreaseThroughReclassifications",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag250": {
   "value": "-6000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:IncreaseDecreaseThroughReclassifications",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag251": {
   "value": "6000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:IncreaseDecreaseThroughReclassifications",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:ReserveForPutOptionOnNonControllingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag258": {
   "value": "-11000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1",
      "footnote3"
     ]
    }
   }
  },
  "Tag257": {
   "value": "3000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1",
      "footnote3"
     ]
    }
   }
  },
  "Tag256": {
   "value": "8200000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:ReserveForPutOptionOnNonControllingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1",
      "footnote3"
     ]
    }
   }
  },
  "Tag255": {
   "value": "15165000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1",
      "footnote3"
     ]
    }
   }
  },
  "Tag254": {
   "value": "-13632000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2",
      "footnote3"
     ]
    }
   }
  },
  "Tag253": {
   "value": "1533000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote3"
     ]
    }
   }
  },
  "Tag260": {
   "value": "128000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag259": {
   "value": "128000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag262": {
   "value": "4390000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag263": {
   "value": "4390000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag267": {
   "value": "39000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag266": {
   "value": "39000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag269": {
   "value": "39557000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag270": {
   "value": "13247000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag271": {
   "value": "52804000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag289": {
   "value": "-12117000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstrumentsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag287": {
   "value": "-67016000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag285": {
   "value": "28104000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag284": {
   "value": "1435110000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag281": {
   "value": "96430000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag279": {
   "value": "1531540000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag288": {
   "value": "-12117000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstrumentsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag286": {
   "value": "-67016000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag283": {
   "value": "28104000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag282": {
   "value": "1435110000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag280": {
   "value": "96430000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag278": {
   "value": "1531540000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag291": {
   "value": "134687000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag292": {
   "value": "13350000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag293": {
   "value": "148037000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLoss",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag299": {
   "value": "250000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstrumentsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag298": {
   "value": "3473000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag297": {
   "value": "-1319000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag296": {
   "value": "-111454000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag295": {
   "value": "-5832000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag294": {
   "value": "-117286000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherComprehensiveIncome",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag302": {
   "value": "-467000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1",
      "footnote4"
     ]
    }
   }
  },
  "Tag301": {
   "value": "-8503000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2",
      "footnote4"
     ]
    }
   }
  },
  "Tag300": {
   "value": "-8970000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote4"
     ]
    }
   }
  },
  "Tag304": {
   "value": "8556000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag305": {
   "value": "8556000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag315": {
   "value": "152000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IssueOfEquity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag314": {
   "value": "152000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IssueOfEquity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag310": {
   "value": "1083000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag311": {
   "value": "1083000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag307": {
   "value": "19787000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag309": {
   "value": "8270000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag308": {
   "value": "28057000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaid",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag323": {
   "value": "-11867000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfGainsAndLossesFromInvestmentsInEquityInstrumentsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag324": {
   "value": "-63543000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag325": {
   "value": "26785000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "bekb:DeferredTaxReserveMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag326": {
   "value": "1447880000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote1"
     ]
    }
   }
  },
  "Tag327": {
   "value": "87175000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   },
   "links": {
    "ftTyp_fact-footnote": {
     "ftGrp_default": [
      "footnote2"
     ]
    }
   }
  },
  "Tag328": {
   "value": "1535055000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag159": {
   "value": "155017000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossFromOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag164": {
   "value": "256527000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProfitLossFromOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag160": {
   "value": "305198000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherAdjustmentsForNoncashItems",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag165": {
   "value": "270417000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherAdjustmentsForNoncashItems",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag161": {
   "value": "3428000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherAdjustmentsForWhichCashEffectsAreInvestingOrFinancingCashFlow",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag201": {
   "value": "-38626000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherAdjustmentsForWhichCashEffectsAreInvestingOrFinancingCashFlow",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag200": {
   "value": "-61299000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:AdjustmentsForProvisionsAndEmployeeBenefitObligations",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag202": {
   "value": "-50756000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:AdjustmentsForProvisionsAndEmployeeBenefitObligations",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag203": {
   "value": "60624000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag206": {
   "value": "56504000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag204": {
   "value": "341721000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag207": {
   "value": "381059000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag205": {
   "value": "-168549000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseInWorkingCapital",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag208": {
   "value": "-124419000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseInWorkingCapital",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag162": {
   "value": "14056000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag209": {
   "value": "-556000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag163": {
   "value": "524326000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag166": {
   "value": "504921000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag210": {
   "value": null,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag173": {
   "value": "978000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag167": {
   "value": "800000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag211": {
   "value": null,
   "dimensions": {
    "concept": "ifrs-full:ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag168": {
   "value": "18750000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsReceivedClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag174": {
   "value": "25324000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsReceivedClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag169": {
   "value": "4410000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag175": {
   "value": "3214000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag170": {
   "value": "94504000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag176": {
   "value": "104477000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag171": {
   "value": "13074000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:PurchaseOfRightOfUseAssetsLand",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag212": {
   "value": null,
   "dimensions": {
    "concept": "bekb:PurchaseOfRightOfUseAssetsLand",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag172": {
   "value": "1349000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ProceedsFromDisposalsOfFixedAssetsClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag177": {
   "value": "52136000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ProceedsFromDisposalsOfFixedAssetsClassifiedAsInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag213": {
   "value": "-91089000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag214": {
   "value": "-31209000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag178": {
   "value": "2960000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:InterestReceivedClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag191": {
   "value": "3076000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:InterestReceivedClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag179": {
   "value": "50130000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:InterestPaidClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag192": {
   "value": "42864000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:InterestPaidClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag180": {
   "value": "39557000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag193": {
   "value": "19787000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag181": {
   "value": "13873000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag194": {
   "value": "5953000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag182": {
   "value": "585696000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProceedsFromNoncurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag195": {
   "value": "201309000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:ProceedsFromNoncurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag183": {
   "value": "675253000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RepaymentsOfNoncurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag196": {
   "value": "247673000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:RepaymentsOfNoncurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag215": {
   "value": "-76715000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag220": {
   "value": "41358000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag184": {
   "value": "39000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ProceedsFromPaymentsForTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag197": {
   "value": "1084000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ProceedsFromPaymentsForTreasuryShareTransactions",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag185": {
   "value": "9500000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ProceedsFromPaymentsForSalesAndPurchasesOfNonControllingInterest",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag198": {
   "value": "8970000",
   "decimals": -3,
   "dimensions": {
    "concept": "bekb:ProceedsFromPaymentsForSalesAndPurchasesOfNonControllingInterest",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag186": {
   "value": "7540000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag217": {
   "value": "-4319000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag216": {
   "value": "-268793000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag218": {
   "value": "-82741000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag187": {
   "value": "164444000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseInCashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag199": {
   "value": "390972000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseInCashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag222": {
   "value": "398273000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag189": {
   "value": "566176000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag221": {
   "value": "3459000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2019-01-01T00:00:00/2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag219": {
   "value": "-16731000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag188": {
   "value": "566176000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag190": {
   "value": "940416000",
   "decimals": -3,
   "dimensions": {
    "concept": "ifrs-full:CashAndCashEquivalents",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2021-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "Tag155": {
   "value": "NV",
   "dimensions": {
    "concept": "ifrs-full:LegalFormOfEntity",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag156": {
   "value": "Belgium",
   "dimensions": {
    "concept": "ifrs-full:DomicileOfEntity",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag223": {
   "value": "world market and technology leader in steel wire trans-formation and coating technologies.",
   "dimensions": {
    "concept": "ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag157": {
   "value": "Bekaert",
   "dimensions": {
    "concept": "ifrs-full:NameOfReportingEntityOrOtherMeansOfIdentification",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag158": {
   "value": "Belgium (i.e. the country of domicile), Chile, China, the USA and Slovakia",
   "dimensions": {
    "concept": "ifrs-full:PrincipalPlaceOfBusiness",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag336": {
   "value": "NV Bekaert SA",
   "dimensions": {
    "concept": "ifrs-full:NameOfParentEntity",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag337": {
   "value": "NV Bekaert SA",
   "dimensions": {
    "concept": "ifrs-full:NameOfUltimateParentOfGroup",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag339": {
   "value": "Bekaertstraat 2BE-8550 ZwevegemBelgium",
   "dimensions": {
    "concept": "ifrs-full:AddressOfRegisteredOfficeOfEntity",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "Tag338": {
   "value": "Belgium",
   "dimensions": {
    "concept": "ifrs-full:CountryOfIncorporation",
    "language": "en",
    "entity": "scheme:5493008SR6XZECH6BN71",
    "period": "2020-01-01T00:00:00/2021-01-01T00:00:00"
   }
  },
  "footnote3": {
   "value": "<span style=\"border-right: none; border-left: none;\">In December 2019, the Group acquired the remaining non-controlling interests in Bekaert Maccaferri Underground Solutions BVBA for a consideration of</span><span style=\"border-right: none; border-left: none;\"> \u20ac </span><span style=\"border-right: none; border-left: none;\">9.5</span><span style=\"border-right: none; border-left: none;\"><span> million</span>. As part of the transaction, the put option held by Maccaferri was extinguished.</span>",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote3",
    "language": "en"
   }
  },
  "footnote2": {
   "value": "See note 6.15. \u2018Non-controlling interests\u2019.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2",
    "language": "en"
   }
  },
  "footnote4": {
   "value": "<span style=\"border-right: none; border-left: none;\">In February 2020, the buy-out of Continental in Bekaert Slatina SRL through the acquisition of Conti's 20<span>%</span> shareholding was closed. A consideration of</span><span style=\"border-right: none; border-left: none;\"> \u20ac </span><span style=\"border-right: none; border-left: none;\">9.0</span><span style=\"border-right: none; border-left: none;\"><span> million</span> was paid.</span>",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote4",
    "language": "en"
   }
  },
  "footnote1": {
   "value": "<span>See note 6.14. \u2018Retained earnings and other Group reserves\u2019.</span>",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote1",
    "language": "en"
   }
  }
 }
}