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  },
  "f13033": {
   "value": "32000000",
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  },
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   "dimensions": {
    "concept": "eramet:IssueOfEquityByNonControllingInterests",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "fact44": {
   "value": "31000000",
   "decimals": -6,
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    "concept": "ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00",
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     "ftGrp_default": [
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  },
  "fact45": {
   "value": "31000000",
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  "fact46": {
   "value": "-2000000",
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    "concept": "ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "fact47": {
   "value": "28000000",
   "decimals": -6,
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    "concept": "ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "f13051": {
   "value": "105371",
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  },
  "f13053": {
   "value": "7000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "f13055": {
   "value": "89000000",
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   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "f13057": {
   "value": "0",
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   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "f13059": {
   "value": "0",
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   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "f13061": {
   "value": "0",
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   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00",
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  },
  "f13063": {
   "value": "0",
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    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
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  },
  "f13065": {
   "value": "-72000000",
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   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
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  },
  "f13067": {
   "value": "24000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13069": {
   "value": "23000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13071": {
   "value": "47000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "f13076": {
   "value": "26741376",
   "decimals": 0,
   "dimensions": {
    "concept": "ifrs-full:NumberOfSharesIssued",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "unit": "xbrli:shares"
   }
  },
  "f13078": {
   "value": "88000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:IssuedCapitalMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13080": {
   "value": "466000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:SharePremiumMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13082": {
   "value": "7000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13084": {
   "value": "-11000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfCashFlowHedgesMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13086": {
   "value": "-92000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13088": {
   "value": "-141000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13090": {
   "value": "695000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:RetainedEarningsMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13092": {
   "value": "1012000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:EquityAttributableToOwnersOfParentMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13094": {
   "value": "323000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "ifrs-full:ComponentsOfEquityAxis": "ifrs-full:NoncontrollingInterestsMember",
    "unit": "iso4217:EUR"
   }
  },
  "f13096": {
   "value": "1335000000",
   "decimals": -6,
   "dimensions": {
    "concept": "ifrs-full:Equity",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2022-01-01T00:00:00",
    "unit": "iso4217:EUR"
   }
  },
  "f13136": {
   "value": "soci\u00e9t\u00e9 anonyme",
   "dimensions": {
    "concept": "ifrs-full:LegalFormOfEntity",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "f16594": {
   "value": "un sous-concert entre les soci\u00e9t\u00e9s Sorame et CEIR, soci\u00e9t\u00e9s contr\u00f4l\u00e9es par la Famille Duval, en vertu d\u2019un pacte d\u2019actionnaires simultan\u00e9 du 19 juillet 1999, entr\u00e9 en vigueur le 21 juillet 1999 et ayant fait l\u2019objet d\u2019un avenant le 13 juillet 2009l\u2019Agence des participations de l\u2019\u00c9tat (APE), par l\u2019interm\u00e9diaire de sa \ufb01liale FSI Equation.",
   "dimensions": {
    "concept": "ifrs-full:NameOfParentEntity",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "f16595": {
   "value": "un sous-concert entre les soci\u00e9t\u00e9s Sorame et CEIR, soci\u00e9t\u00e9s contr\u00f4l\u00e9es par la Famille Duval, en vertu d\u2019un pacte d\u2019actionnaires simultan\u00e9 du 19 juillet 1999, entr\u00e9 en vigueur le 21 juillet 1999 et ayant fait l\u2019objet d\u2019un avenant le 13 juillet 2009l\u2019Agence des participations de l\u2019\u00c9tat (APE), par l\u2019interm\u00e9diaire de sa \ufb01liale FSI Equation.",
   "dimensions": {
    "concept": "ifrs-full:NameOfUltimateParentOfGroup",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "f28128": {
   "value": "10, boulevard de Grenelle, 75015 Paris",
   "dimensions": {
    "concept": "ifrs-full:AddressOfRegisteredOfficeOfEntity",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "f28129": {
   "value": "10, boulevard de Grenelle, 75015 Paris",
   "dimensions": {
    "concept": "ifrs-full:DomicileOfEntity",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "f28130": {
   "value": "10, boulevard de Grenelle, 75015 Paris",
   "dimensions": {
    "concept": "ifrs-full:PrincipalPlaceOfBusiness",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "f28135": {
   "value": "France",
   "dimensions": {
    "concept": "ifrs-full:CountryOfIncorporation",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "f39740": {
   "value": "activit\u00e9s mini\u00e8res et m\u00e9tallurgiques",
   "dimensions": {
    "concept": "ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities",
    "language": "fr",
    "entity": "scheme:549300LUH78PG2MP6N64",
    "period": "2021-01-01T00:00:00/2022-01-01T00:00:00"
   }
  },
  "footnote0x32x0": {
   "value": "(1) En application de la norme IFRS 5 \u00ab Actifs non courants d\u00e9tenus en vue de la vente et activit\u00e9s abandonn\u00e9es \u00bb, les UGT Sandouville, Erasteel et Aubert & Duval sont pr\u00e9sent\u00e9es comme des activit\u00e9s en cours de cession.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote0x32x0",
    "language": "fr"
   }
  },
  "footnote2x44x0": {
   "value": "(3)En application de la norme IFRS 5 \u00ab Actifs non courants d\u00e9tenus en vue de la vente et activit\u00e9s abandonn\u00e9es \u00bb, les UGT Sandouville, Erasteel et Aubert & Duval sont pr\u00e9sent\u00e9es comme des activit\u00e9s en cours de cession.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x44x0",
    "language": "fr"
   }
  },
  "footnote2x42x2": {
   "value": "(117)",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x42x2",
    "language": "fr"
   }
  },
  "footnote2x41x0": {
   "value": "Charges d\u2019int\u00e9r\u00eats pay\u00e9es (y compris charge IFRS 16)",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x41x0",
    "language": "fr"
   }
  },
  "footnote4x49x0": {
   "value": "(1) Conform\u00e9ment \u00e0 IFRS 5 \u00ab Actifs non courants d\u00e9tenus en vue de la vente et activit\u00e9s abandonn\u00e9es \u00bb, les actifs et les passifs des UGT Aubert & Duval, Erasteel et Eramet Sandouville sont pr\u00e9sent\u00e9s dans le bilan consolid\u00e9 au 31 d\u00e9cembre 2021 comme des \u00ab actifs d\u00e9tenus en vue de la vente \u00bb.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote4x49x0",
    "language": "fr"
   }
  },
  "footnote2x43x0": {
   "value": "(2) Les biens en cr\u00e9dit-bail sont trait\u00e9s comme des achats en substances et donc comme des acquisitions d\u2019immobilisations \u00e0 la diff\u00e9rence des autres contrats de location.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x43x0",
    "language": "fr"
   }
  },
  "footnote0x33x0": {
   "value": "(2)Lorsque le r\u00e9sultat de base par action est n\u00e9gatif, le r\u00e9sultat dilu\u00e9 par action est r\u00e9put\u00e9 \u00e9gal \u00e0 ce dernier, les instruments \u00e9tant alors consid\u00e9r\u00e9s comme anti-dilutifs.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote0x33x0",
    "language": "fr"
   }
  },
  "footnote3x26x0": {
   "value": "(2)Les autres mouvements sont essentiellement constitu\u00e9s des effets de l\u2019hyperin\ufb02ation en Argentine.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote3x26x0",
    "language": "fr"
   }
  },
  "footnote2x40x2": {
   "value": "9",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x40x2",
    "language": "fr"
   }
  },
  "footnote4x20x0": {
   "value": "(2) Voir Note 3.3 \u00ab Retraitement de l\u2019information comparative \u00bb.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote4x20x0",
    "language": "fr"
   }
  },
  "footnote2x42x3": {
   "value": "(72)",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x42x3",
    "language": "fr"
   }
  },
  "footnote4x50x0": {
   "value": "(2) Voir Note 3.3 \u00ab Retraitement de l\u2019information comparative \u00bb.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote4x50x0",
    "language": "fr"
   }
  },
  "footnote2x41x3": {
   "value": "(118)",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x41x3",
    "language": "fr"
   }
  },
  "footnote3x25x0": {
   "value": "(1) Voir Note 3.3 \u00ab Retraitement de l\u2019information comparative \u00bb.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote3x25x0",
    "language": "fr"
   }
  },
  "footnote2x42x0": {
   "value": "Imp\u00f4ts pay\u00e9s",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x42x0",
    "language": "fr"
   }
  },
  "footnote2x40x0": {
   "value": "Produits d\u2019int\u00e9r\u00eats re\u00e7us",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x40x0",
    "language": "fr"
   }
  },
  "footnote4x19x0": {
   "value": "(1) Conform\u00e9ment \u00e0 IFRS 5 \u00ab Actifs non courants d\u00e9tenus en vue de la vente et activit\u00e9s abandonn\u00e9es \u00bb, les actifs et les passifs des UGT Aubert & Duval, Erasteel et Eramet Sandouville sont pr\u00e9sent\u00e9s dans le bilan consolid\u00e9 au 31 d\u00e9cembre 2021 comme des \u00ab actifs d\u00e9tenus en vue de la vente \u00bb.",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote4x19x0",
    "language": "fr"
   }
  },
  "footnote2x39x0": {
   "value": "(1) Dont, inclus dans les activit\u00e9s op\u00e9rationnelles :",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x39x0",
    "language": "fr"
   }
  },
  "footnote2x41x2": {
   "value": "(114)",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x41x2",
    "language": "fr"
   }
  },
  "footnote2x40x3": {
   "value": "10",
   "dimensions": {
    "concept": "xbrl:note",
    "noteId": "footnote2x40x3",
    "language": "fr"
   }
  }
 }
}