{
  "report-package": "altarea-2020-12-31AR.zip",
  "date": "2020-12-31",
  "lei": "969500ICGCY1PD6OT783",
  "system": "ESEF",
  "country": "FR",
  "langs": [
    "fr"
  ],
  "report": "altarea-2020-12-31AR/reports/altarea-2020-12-31AR.xhtml",
  "viewer": "altarea-2020-12-31AR/reports/ixbrlviewer.html",
  "xbrl-json": "altarea-2020-12-31AR.json",
  "sha256sum": "b4c2d858348c3861bc907b8f2a978d63fc1874a405093a09f5287ee2982db967",
  "errors": [
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ProfitLossBeforeTax in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum 272,400,000 computed sum 272,500,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from altarea:ProfitLossFromOperatingActivitiesBeforeShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum -377,400,000 computed sum -377,100,000 context contexte_01012020-31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from altarea:ProfitLossFromOperatingActivitiesBeforeShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum 353,200,000 computed sum 354,200,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:RentalIncomeFromInvestmentPropertyNetOfDirectOperatingExpense in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum 159,300,000 computed sum 159,400,000 context contexte_01012020-31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:RentalIncomeFromInvestmentPropertyNetOfDirectOperatingExpense in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum 190,800,000 computed sum 190,700,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from altarea:UnrecoverableRentalExpenses in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum 8,700,000 computed sum 8,800,000 context contexte_01012020-31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from altarea:NetOverheadExpense in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum 111,900,000 computed sum 111,800,000 context contexte_01012020-31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from altarea:NetOverheadExpense in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum 118,200,000 computed sum 118,300,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:OtherOperatingIncomeExpense in link role http://www.altarea.com/role/StatementConsolidatedIncomeStatementCal1 reported sum -8,600,000 computed sum -8,700,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:IncreaseDecreaseInCashAndCashEquivalents in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfCashFlowsCal1 reported sum 152,400,000 computed sum 152,500,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:CashFlowsFromUsedInFinancingActivities in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfCashFlowsCal1 reported sum -32,000,000 computed sum -32,200,000 context contexte_01012020-31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:CashFlowsFromUsedInFinancingActivities in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfCashFlowsCal1 reported sum -31,000,000 computed sum -31,100,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:CashFlowsFromUsedInInvestingActivities in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfCashFlowsCal1 reported sum 33,200,000 computed sum 33,100,000 context contexte_01012020-31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:CashFlowsFromUsedInInvestingActivities in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfCashFlowsCal1 reported sum -154,800,000 computed sum -154,900,000 context contexte_01012019-31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:Assets in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 9,087,900,000 computed sum 9,087,800,000 context contexte_31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:NoncurrentAssets in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 5,132,200,000 computed sum 5,132,100,000 context contexte_31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:IntangibleAssetsAndGoodwill in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 331,400,000 computed sum 331,500,000 context contexte_31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:IntangibleAssetsAndGoodwill in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 330,400,000 computed sum 330,500,000 context contexte_31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:InvestmentProperty in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 4,472,100,000 computed sum 4,472,200,000 context contexte_31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:InvestmentProperty in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 4,024,600,000 computed sum 4,024,700,000 context contexte_31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:CurrentAssets in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 3,817,800,000 computed sum 3,817,900,000 context contexte_31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:EquityAttributableToOwnersOfParent in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 2,144,400,000 computed sum 2,144,500,000 context contexte_31122019 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:EquityAttributableToOwnersOfParent in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 1,758,500,000 computed sum 1,758,600,000 context contexte_31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:NoncurrentFinancialLiabilities in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 2,500,200,000 computed sum 2,500,300,000 context contexte_31122020 unit eur unreportedContributingItems none"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:CurrentLiabilities in link role http://www.altarea.com/role/StatementConsolidatedStatementsOfFinancialPosition reported sum 2,928,600,000 computed sum 2,928,700,000 context contexte_31122019 unit eur unreportedContributingItems none"
    }
  ],
  "added": "2021-05-18"
}