| Fact | Value | Period | Source |
|---|
| cash_and_equivalents | {"amount": 10845000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2023-12-31 | esef |
| cash_and_equivalents | {"amount": 14388000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2022-12-31 | esef |
| cash_and_equivalents | {"amount": 13149000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2021-12-31 | esef |
| cash_and_equivalents | {"amount": 6681000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2020-12-31 | esef |
| cash_and_equivalents | {"amount": 4551000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2019-12-31 | esef |
| entity_legal_form | {"value": "W2NK", "elf_code": "W2NK"} | | gleif |
| headquarters_address | {"city": "ATHENS", "region": null, "street": "8 OTHONOS STREET", "country": "GR", "formatt | | gleif |
| ifrs:AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets | {"amount": -62000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets | {"amount": 868000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets | {"amount": 39000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInDerivativeFinancialAssets | {"amount": 36000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToBanks | {"amount": -447000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToBanks | {"amount": -107000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToBanks | {"amount": 1095000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToBanks | {"amount": 588000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers | {"amount": -1982000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers | {"amount": -1517000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers | {"amount": -3226000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInLoansAndAdvancesToCustomers | {"amount": -1636000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": 158000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": -79000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": 116000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": -22000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 120000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 109000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 124000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 114000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty | {"amount": 6000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty | {"amount": 34000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty | {"amount": 3000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty | {"amount": 30000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossRecognisedInProfitOrLossGoodwill | {"amount": 160000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 2081000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 412000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 291000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 490000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInDepositsFromCustomers | {"amount": 1730000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInDepositsFromCustomers | {"amount": 2251000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInDepositsFromCustomers | {"amount": 4068000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInDepositsFromCustomers | {"amount": 5338000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -313000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -133000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": 147000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -4000000.0} | 2021-12-31 | esef |
| ifrs:Assets | {"amount": 79781000000.0} | 2023-12-31 | esef |
| ifrs:Assets | {"amount": 81460000000.0} | 2022-12-31 | esef |
| ifrs:Assets | {"amount": 77852000000.0} | 2021-12-31 | esef |
| ifrs:Assets | {"amount": 67721000000.0} | 2020-12-31 | esef |
| ifrs:BasicAndDilutedEarningsLossPerShare | {"amount": -0.33} | 2020-12-31 | esef |
| ifrs:BasicAndDilutedEarningsLossPerShare | {"amount": 0.09} | 2021-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 10943000000.0} | 2023-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 14994000000.0} | 2022-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 13515000000.0} | 2021-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 6637000000.0} | 2020-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 10845000000.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 14388000000.0} | 2022-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 13149000000.0} | 2021-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 6681000000.0} | 2020-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 4551000000.0} | 2019-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": -425000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 281000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 211000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 1000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesContinuingOperations | {"amount": 909000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesContinuingOperations | {"amount": -890000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesContinuingOperations | {"amount": 1021000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesContinuingOperations | {"amount": 953000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations | {"amount": -1000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations | {"amount": -3000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesContinuingOperations | {"amount": -2314000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesContinuingOperations | {"amount": -468000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesContinuingOperations | {"amount": -2657000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesContinuingOperations | {"amount": -2698000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations | {"amount": 44000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations | {"amount": -3000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesContinuingOperations | {"amount": -2330000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesContinuingOperations | {"amount": 3488000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesContinuingOperations | {"amount": 2874000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesContinuingOperations | {"amount": 8213000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations | {"amount": 148000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations | {"amount": 93000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 440000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 0.0} | 2022-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 47000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": -121000000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 1345000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": -1364000000.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 1078000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 273000000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": -1000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": -1000000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": -1364000000.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 1079000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 274000000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncomeFromContinuingOperationsAttributableToNoncontrollingInterests | {"amount": 0.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeFromContinuingOperationsAttributableToNoncontrollingInterests | {"amount": 0.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeFromContinuingOperationsAttributableToOwnersOfParent | {"amount": 1371000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeFromContinuingOperationsAttributableToOwnersOfParent | {"amount": 1127000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeFromDiscontinuedOperationsAttributableToNoncontrollingInterests | {"amount": -11000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeFromDiscontinuedOperationsAttributableToNoncontrollingInterests | {"amount": -1000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeFromDiscontinuedOperationsAttributableToOwnersOfParent | {"amount": -15000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeFromDiscontinuedOperationsAttributableToOwnersOfParent | {"amount": -1000000.0} | 2022-12-31 | esef |
| ifrs:DebtSecurities | {"amount": 4756000000.0} | 2023-12-31 | esef |
| ifrs:DebtSecurities | {"amount": 3552000000.0} | 2022-12-31 | esef |
| ifrs:DebtSecurities | {"amount": 2552000000.0} | 2021-12-31 | esef |
| ifrs:DebtSecurities | {"amount": 1556000000.0} | 2020-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 3991000000.0} | 2023-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 4161000000.0} | 2022-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 4422000000.0} | 2021-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 4519000000.0} | 2020-12-31 | esef |
| ifrs:DepositsFromCustomers | {"amount": 57442000000.0} | 2023-12-31 | esef |
| ifrs:DepositsFromCustomers | {"amount": 57239000000.0} | 2022-12-31 | esef |
| ifrs:DepositsFromCustomers | {"amount": 53168000000.0} | 2021-12-31 | esef |
| ifrs:DepositsFromCustomers | {"amount": 47290000000.0} | 2020-12-31 | esef |
| ifrs:DerivativeFinancialAssets | {"amount": 881000000.0} | 2023-12-31 | esef |
| ifrs:DerivativeFinancialAssets | {"amount": 1185000000.0} | 2022-12-31 | esef |
| ifrs:DerivativeFinancialAssets | {"amount": 1949000000.0} | 2021-12-31 | esef |
| ifrs:DerivativeFinancialAssets | {"amount": 2552000000.0} | 2020-12-31 | esef |
| ifrs:DerivativeFinancialLiabilities | {"amount": 1450000000.0} | 2023-12-31 | esef |
| ifrs:DerivativeFinancialLiabilities | {"amount": 1661000000.0} | 2022-12-31 | esef |
| ifrs:DerivativeFinancialLiabilities | {"amount": 2394000000.0} | 2021-12-31 | esef |
| ifrs:DerivativeFinancialLiabilities | {"amount": 2939000000.0} | 2020-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsInvestingActivities | {"amount": 21000000.0} | 2021-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsInvestingActivities | {"amount": 15000000.0} | 2023-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsInvestingActivities | {"amount": 21000000.0} | 2022-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsInvestingActivities | {"amount": 3000000.0} | 2020-12-31 | esef |
| ifrs:EffectOfExchangeRateChangesOnCashAndCashEquivalents | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:EffectOfExchangeRateChangesOnCashAndCashEquivalents | {"amount": 1000000.0} | 2022-12-31 | esef |
| ifrs:EffectOfExchangeRateChangesOnCashAndCashEquivalents | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:Equity | {"amount": 7899000000.0} | 2023-12-31 | esef |
| ifrs:Equity | {"amount": 6718000000.0} | 2022-12-31 | esef |
| ifrs:Equity | {"amount": 5635000000.0} | 2021-12-31 | esef |
| ifrs:Equity | {"amount": 5262000000.0} | 2020-12-31 | esef |
| ifrs:Equity | {"amount": 6684000000.0} | 2019-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 79781000000.0} | 2023-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 81460000000.0} | 2022-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 77852000000.0} | 2021-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 67721000000.0} | 2020-12-31 | esef |
| ifrs:EquityAttributableToOwnersOfParent | {"amount": 7899000000.0} | 2023-12-31 | esef |
| ifrs:EquityAttributableToOwnersOfParent | {"amount": 6623000000.0} | 2022-12-31 | esef |
| ifrs:EquityAttributableToOwnersOfParent | {"amount": 5539000000.0} | 2021-12-31 | esef |
| ifrs:EquityAttributableToOwnersOfParent | {"amount": 5262000000.0} | 2020-12-31 | esef |
| ifrs:ExpenseOfRestructuringActivities | {"amount": 37000000.0} | 2023-12-31 | esef |
| ifrs:ExpenseOfRestructuringActivities | {"amount": 147000000.0} | 2020-12-31 | esef |
| ifrs:ExpenseOfRestructuringActivities | {"amount": 102000000.0} | 2022-12-31 | esef |
| ifrs:ExpenseOfRestructuringActivities | {"amount": 25000000.0} | 2021-12-31 | esef |
| ifrs:GainsLossesOnCashFlowHedgesNetOfTax | {"amount": 19000000.0} | 2023-12-31 | esef |
| ifrs:GainsLossesOnCashFlowHedgesNetOfTax | {"amount": 5000000.0} | 2022-12-31 | esef |
| ifrs:GainsLossesOnCashFlowHedgesNetOfTax | {"amount": -5000000.0} | 2020-12-31 | esef |
| ifrs:GainsLossesOnCashFlowHedgesNetOfTax | {"amount": 36000000.0} | 2021-12-31 | esef |
| ifrs:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax | {"amount": 1000000.0} | 2022-12-31 | esef |
| ifrs:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax | {"amount": 1000000.0} | 2023-12-31 | esef |
| ifrs:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax | {"amount": 188000000.0} | 2023-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax | {"amount": -547000000.0} | 2022-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax | {"amount": 216000000.0} | 2020-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax | {"amount": -97000000.0} | 2021-12-31 | esef |
| ifrs:ImpairmentLossRecognisedInProfitOrLossGoodwill | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:ImpairmentLossRecognisedInProfitOrLossGoodwill | {"amount": 160000000.0} | 2020-12-31 | esef |
| ifrs:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances | {"amount": 412000000.0} | 2023-12-31 | esef |
| ifrs:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances | {"amount": 2081000000.0} | 2020-12-31 | esef |
| ifrs:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances | {"amount": 291000000.0} | 2022-12-31 | esef |
| ifrs:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossLoansAndAdvances | {"amount": 490000000.0} | 2021-12-31 | esef |
| ifrs:IncomeTaxesPaidRefundClassifiedAsOperatingActivities | {"amount": 64000000.0} | 2023-12-31 | esef |
| ifrs:IncomeTaxesPaidRefundClassifiedAsOperatingActivities | {"amount": 45000000.0} | 2022-12-31 | esef |
| ifrs:IncomeTaxesPaidRefundClassifiedAsOperatingActivities | {"amount": 29000000.0} | 2020-12-31 | esef |
| ifrs:IncomeTaxesPaidRefundClassifiedAsOperatingActivities | {"amount": 33000000.0} | 2021-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 336000000.0} | 2020-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 405000000.0} | 2022-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 261000000.0} | 2023-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 156000000.0} | 2021-12-31 | esef |
| ifrs:IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations | {"amount": 192000000.0} | 2023-12-31 | esef |
| ifrs:IncreaseDecreaseInCashAndCashEquivalentsDiscontinuedOperations | {"amount": 88000000.0} | 2022-12-31 | esef |
| ifrs:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl | {"amount": 1000000.0} | 2020-12-31 | esef |
| ifrs:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl | {"amount": 98000000.0} | 2021-12-31 | esef |
| ifrs:IncreaseDecreaseThroughDisposalOfSubsidiary | {"amount": -83000000.0} | 2023-12-31 | esef |
| ifrs:IncreaseDecreaseThroughSharebasedPaymentTransactions | {"amount": 4000000.0} | 2022-12-31 | esef |
| ifrs:IncreaseDecreaseThroughSharebasedPaymentTransactions | {"amount": 8000000.0} | 2023-12-31 | esef |
| ifrs:IncreaseDecreaseThroughSharebasedPaymentTransactions | {"amount": 2000000.0} | 2021-12-31 | esef |
| ifrs:IncreaseDecreaseThroughTransfersAndOtherChangesEquity | {"amount": -3000000.0} | 2023-12-31 | esef |
| ifrs:IncreaseDecreaseThroughTransfersAndOtherChangesEquity | {"amount": 1000000.0} | 2020-12-31 | esef |
| ifrs:IncreaseDecreaseThroughTransfersAndOtherChangesEquity | {"amount": -1000000.0} | 2021-12-31 | esef |
| ifrs:IncreaseDecreaseThroughTreasuryShareTransactions | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:IncreaseDecreaseThroughTreasuryShareTransactions | {"amount": 1000000.0} | 2022-12-31 | esef |
| ifrs:IncreaseDecreaseThroughTreasuryShareTransactions | {"amount": -100000000.0} | 2023-12-31 | esef |
| ifrs:IncreaseDecreaseThroughTreasuryShareTransactions | {"amount": 1000000.0} | 2021-12-31 | esef |
| ifrs:InterestExpense | {"amount": 2280000000.0} | 2023-12-31 | esef |
| ifrs:InterestExpense | {"amount": 606000000.0} | 2020-12-31 | esef |
| ifrs:InterestExpense | {"amount": 765000000.0} | 2022-12-31 | esef |
| ifrs:InterestExpense | {"amount": 521000000.0} | 2021-12-31 | esef |
| ifrs:InterestRevenueExpense | {"amount": 2174000000.0} | 2023-12-31 | esef |
| ifrs:InterestRevenueExpense | {"amount": 1349000000.0} | 2020-12-31 | esef |
| ifrs:InterestRevenueExpense | {"amount": 1550000000.0} | 2022-12-31 | esef |
| ifrs:InterestRevenueExpense | {"amount": 1321000000.0} | 2021-12-31 | esef |
| ifrs:InvestmentAccountedForUsingEquityMethod | {"amount": 541000000.0} | 2023-12-31 | esef |
| ifrs:InvestmentAccountedForUsingEquityMethod | {"amount": 173000000.0} | 2022-12-31 | esef |
| ifrs:InvestmentAccountedForUsingEquityMethod | {"amount": 267000000.0} | 2021-12-31 | esef |