| Fact | Value | Period | Source |
|---|
| cash_and_equivalents | {"amount": 978000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2023-12-31 | esef |
| cash_and_equivalents | {"amount": 825800000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2022-12-31 | esef |
| cash_and_equivalents | {"amount": 884800000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2021-12-31 | esef |
| cash_and_equivalents | {"amount": 680600000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2020-12-31 | esef |
| cashflow_financing | {"amount": -201100000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2022-12-31 | esef |
| cashflow_financing | {"amount": -197000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2023-12-31 | esef |
| cashflow_financing | {"amount": -1220000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2021-12-31 | esef |
| cashflow_financing | {"amount": -110900000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2020-12-31 | esef |
| cashflow_investing | {"amount": -1970000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2023-12-31 | esef |
| cashflow_investing | {"amount": -607900000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2021-12-31 | esef |
| cashflow_investing | {"amount": -980300000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2020-12-31 | esef |
| cashflow_investing | {"amount": -2071800000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2022-12-31 | esef |
| cashflow_operating | {"amount": 2314000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2023-12-31 | esef |
| cashflow_operating | {"amount": 2526000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2022-12-31 | esef |
| entity_legal_form | {"value": "P418", "elf_code": "P418"} | | gleif |
| headquarters_address | {"city": "BOLOGNA", "region": "IT-BO", "street": "VIA STALINGRADO, 45", "country": "IT", " | | gleif |
| ifrs:AcquisitionAndAdministrationExpenseRelatedToInsuranceContracts | {"amount": 1844600000.0} | 2020-12-31 | esef |
| ifrs:AcquisitionAndAdministrationExpenseRelatedToInsuranceContracts | {"amount": 1856600000.0} | 2021-12-31 | esef |
| ifrs:AcquisitionAndAdministrationExpenseRelatedToInsuranceContracts | {"amount": 1886600000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": -725000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": -202900000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": -844300000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 918100000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForProvisions | {"amount": -77000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForProvisions | {"amount": -15700000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForProvisions | {"amount": -4600000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForProvisions | {"amount": 173900000.0} | 2022-12-31 | esef |
| ifrs:Assets | {"amount": 75121000000.0} | 2023-12-31 | esef |
| ifrs:Assets | {"amount": 70211000000.0} | 2022-12-31 | esef |
| ifrs:Assets | {"amount": 76459300000.0} | 2021-12-31 | esef |
| ifrs:Assets | {"amount": 75424500000.0} | 2020-12-31 | esef |
| ifrs:CapitalReserve | {"amount": 347000000.0} | 2023-12-31 | esef |
| ifrs:CapitalReserve | {"amount": 346800000.0} | 2022-12-31 | esef |
| ifrs:CapitalReserve | {"amount": 346800000.0} | 2021-12-31 | esef |
| ifrs:CapitalReserve | {"amount": 346800000.0} | 2020-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 978000000.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 825800000.0} | 2022-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 884800000.0} | 2021-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 680600000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -201100000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -197000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -1220000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -110900000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -1970000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -607900000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -980300000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -2071800000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivities | {"amount": 2314000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivities | {"amount": 2526000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": -1794200000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 1080000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 678200000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 1001200000.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 74000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 32400000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 38200000.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 900000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 1006000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 645800000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 962900000.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": -1795100000.0} | 2022-12-31 | esef |
| ifrs:CurrentTaxAssets | {"amount": 3000000.0} | 2023-12-31 | esef |
| ifrs:CurrentTaxAssets | {"amount": 36300000.0} | 2022-12-31 | esef |
| ifrs:CurrentTaxAssets | {"amount": 9100000.0} | 2021-12-31 | esef |
| ifrs:CurrentTaxAssets | {"amount": 8600000.0} | 2020-12-31 | esef |
| ifrs:CurrentTaxLiabilities | {"amount": 16000000.0} | 2023-12-31 | esef |
| ifrs:CurrentTaxLiabilities | {"amount": 12500000.0} | 2022-12-31 | esef |
| ifrs:CurrentTaxLiabilities | {"amount": 39400000.0} | 2021-12-31 | esef |
| ifrs:CurrentTaxLiabilities | {"amount": 38500000.0} | 2020-12-31 | esef |
| ifrs:DeferredAcquisitionCostsArisingFromInsuranceContracts | {"amount": 102100000.0} | 2022-12-31 | esef |
| ifrs:DeferredAcquisitionCostsArisingFromInsuranceContracts | {"amount": 100100000.0} | 2021-12-31 | esef |
| ifrs:DeferredAcquisitionCostsArisingFromInsuranceContracts | {"amount": 99200000.0} | 2020-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 408000000.0} | 2023-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 885000000.0} | 2022-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 108100000.0} | 2021-12-31 | esef |
| ifrs:DeferredTaxAssets | {"amount": 2600000.0} | 2020-12-31 | esef |
| ifrs:DeferredTaxLiabilities | {"amount": 89000000.0} | 2023-12-31 | esef |
| ifrs:DeferredTaxLiabilities | {"amount": 800000.0} | 2022-12-31 | esef |
| ifrs:DeferredTaxLiabilities | {"amount": 107600000.0} | 2021-12-31 | esef |
| ifrs:DeferredTaxLiabilities | {"amount": 136300000.0} | 2020-12-31 | esef |
| ifrs:DividendsPaidClassifiedAsFinancingActivities | {"amount": 509000000.0} | 2023-12-31 | esef |
| ifrs:DividendsPaidClassifiedAsFinancingActivities | {"amount": 564000000.0} | 2022-12-31 | esef |
| ifrs:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities | {"amount": 537500000.0} | 2021-12-31 | esef |
| ifrs:DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities | {"amount": 452500000.0} | 2020-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsInvestingActivities | {"amount": 167000000.0} | 2022-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsInvestingActivities | {"amount": 166000000.0} | 2023-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsOperatingActivities | {"amount": 218000000.0} | 2023-12-31 | esef |
| ifrs:DividendsReceivedClassifiedAsOperatingActivities | {"amount": 213000000.0} | 2022-12-31 | esef |
| ifrs:DividendsRecognisedAsDistributionsToOwnersPerShare | {"amount": 0.19} | 2023-12-31 | esef |
| ifrs:DividendsRecognisedAsDistributionsToOwnersPerShare | {"amount": 0.19} | 2022-12-31 | esef |
| ifrs:EffectOfExchangeRateChangesOnCashAndCashEquivalents | {"amount": 0.0} | 2023-12-31 | esef |
| ifrs:EffectOfExchangeRateChangesOnCashAndCashEquivalents | {"amount": 0.0} | 2022-12-31 | esef |
| ifrs:EffectOfExchangeRateChangesOnCashAndCashEquivalents | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:EffectOfExchangeRateChangesOnCashAndCashEquivalents | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:Equity | {"amount": 7307000000.0} | 2023-12-31 | esef |
| ifrs:Equity | {"amount": 5812600000.0} | 2022-12-31 | esef |
| ifrs:Equity | {"amount": 8233800000.0} | 2021-12-31 | esef |
| ifrs:Equity | {"amount": 8144000000.0} | 2020-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 75121000000.0} | 2023-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 70211000000.0} | 2022-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 76459300000.0} | 2021-12-31 | esef |
| ifrs:EquityAndLiabilities | {"amount": 75424500000.0} | 2020-12-31 | esef |
| ifrs:EquityAttributableToOwnersOfParent | {"amount": 5568600000.0} | 2022-12-31 | esef |
| ifrs:EquityAttributableToOwnersOfParent | {"amount": 7964000000.0} | 2021-12-31 | esef |
| ifrs:EquityAttributableToOwnersOfParent | {"amount": 7880800000.0} | 2020-12-31 | esef |
| ifrs:ExpenseForPolicyholderClaimsAndBenefitsWithoutReductionForReinsuranceHeld | {"amount": 9992100000.0} | 2021-12-31 | esef |
| ifrs:ExpenseForPolicyholderClaimsAndBenefitsWithoutReductionForReinsuranceHeld | {"amount": 9015200000.0} | 2020-12-31 | esef |
| ifrs:ExpenseForPolicyholderClaimsAndBenefitsWithoutReductionForReinsuranceHeld | {"amount": 8782800000.0} | 2022-12-31 | esef |
| ifrs:FeeAndCommissionExpense | {"amount": 88600000.0} | 2022-12-31 | esef |
| ifrs:FeeAndCommissionExpense | {"amount": 36400000.0} | 2021-12-31 | esef |
| ifrs:FeeAndCommissionExpense | {"amount": 19700000.0} | 2020-12-31 | esef |
| ifrs:FeeAndCommissionIncome | {"amount": 45300000.0} | 2021-12-31 | esef |
| ifrs:FeeAndCommissionIncome | {"amount": 34400000.0} | 2020-12-31 | esef |
| ifrs:FeeAndCommissionIncome | {"amount": 49000000.0} | 2022-12-31 | esef |
| ifrs:FinanceIncomeExpensesFromReinsuranceContractsHeldRecognisedInProfitOrLoss | {"amount": -3000000.0} | 2023-12-31 | esef |
| ifrs:FinanceIncomeExpensesFromReinsuranceContractsHeldRecognisedInProfitOrLoss | {"amount": -2000000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAtAmortisedCost | {"amount": 2149000000.0} | 2023-12-31 | esef |
| ifrs:FinancialAssetsAtAmortisedCost | {"amount": 2076000000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughOtherComprehensiveIncome | {"amount": 40867000000.0} | 2023-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughOtherComprehensiveIncome | {"amount": 37126000000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": 16410000000.0} | 2023-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": 9121400000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": 8574300000.0} | 2021-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": 7436500000.0} | 2020-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading | {"amount": 72000000.0} | 2023-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading | {"amount": 281000000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLossDesignatedAsUponInitialRecognition | {"amount": 10679000000.0} | 2023-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLossDesignatedAsUponInitialRecognition | {"amount": 8786000000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue | {"amount": 5659000000.0} | 2023-12-31 | esef |
| ifrs:FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue | {"amount": 6832000000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAvailableforsale | {"amount": 41283000000.0} | 2022-12-31 | esef |
| ifrs:FinancialAssetsAvailableforsale | {"amount": 50435000000.0} | 2021-12-31 | esef |
| ifrs:FinancialAssetsAvailableforsale | {"amount": 51102300000.0} | 2020-12-31 | esef |
| ifrs:FinancialLiabilities | {"amount": 13571000000.0} | 2023-12-31 | esef |
| ifrs:FinancialLiabilities | {"amount": 9142000000.0} | 2022-12-31 | esef |
| ifrs:FinancialLiabilities | {"amount": 8411200000.0} | 2021-12-31 | esef |
| ifrs:FinancialLiabilities | {"amount": 7055300000.0} | 2020-12-31 | esef |
| ifrs:FinancialLiabilitiesAtAmortisedCost | {"amount": 3064000000.0} | 2023-12-31 | esef |
| ifrs:FinancialLiabilitiesAtAmortisedCost | {"amount": 2171000000.0} | 2022-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLoss | {"amount": 10507000000.0} | 2023-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLoss | {"amount": 6839100000.0} | 2022-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLoss | {"amount": 6356400000.0} | 2021-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLoss | {"amount": 4379300000.0} | 2020-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading | {"amount": 95000000.0} | 2023-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading | {"amount": 155000000.0} | 2022-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLossDesignatedAsUponInitialRecognition | {"amount": 10412000000.0} | 2023-12-31 | esef |
| ifrs:FinancialLiabilitiesAtFairValueThroughProfitOrLossDesignatedAsUponInitialRecognition | {"amount": 8568000000.0} | 2022-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": 460000000.0} | 2023-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": 188800000.0} | 2021-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": -187000000.0} | 2020-12-31 | esef |
| ifrs:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss | {"amount": -312900000.0} | 2022-12-31 | esef |
| ifrs:Goodwill | {"amount": 765000000.0} | 2023-12-31 | esef |
| ifrs:Goodwill | {"amount": 602100000.0} | 2022-12-31 | esef |
| ifrs:Goodwill | {"amount": 513700000.0} | 2021-12-31 | esef |
| ifrs:Goodwill | {"amount": 513700000.0} | 2020-12-31 | esef |
| ifrs:HeldtomaturityInvestments | {"amount": 365700000.0} | 2022-12-31 | esef |
| ifrs:HeldtomaturityInvestments | {"amount": 366700000.0} | 2021-12-31 | esef |
| ifrs:HeldtomaturityInvestments | {"amount": 420800000.0} | 2020-12-31 | esef |
| ifrs:IncomeTaxesPaidRefundClassifiedAsOperatingActivities | {"amount": 97000000.0} | 2023-12-31 | esef |
| ifrs:IncomeTaxesPaidRefundClassifiedAsOperatingActivities | {"amount": 156000000.0} | 2022-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 265500000.0} | 2020-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 253000000.0} | 2023-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 171700000.0} | 2021-12-31 | esef |
| ifrs:IncomeTaxExpenseContinuingOperations | {"amount": 268500000.0} | 2022-12-31 | esef |
| ifrs:IncreaseDecreaseInCashAndCashEquivalents | {"amount": 204300000.0} | 2021-12-31 | esef |
| ifrs:IncreaseDecreaseInCashAndCashEquivalents | {"amount": -66600000.0} | 2020-12-31 | esef |
| ifrs:IncreaseDecreaseInCashAndCashEquivalents | {"amount": -54800000.0} | 2022-12-31 | esef |
| ifrs:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges | {"amount": 148000000.0} | 2023-12-31 | esef |
| ifrs:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges | {"amount": -55000000.0} | 2022-12-31 | esef |
| ifrs:InsuranceContractsIssuedThatAreAssets | {"amount": 63000000.0} | 2023-12-31 | esef |
| ifrs:InsuranceContractsIssuedThatAreAssets | {"amount": 54000000.0} | 2022-12-31 | esef |
| ifrs:InsuranceContractsIssuedThatAreLiabilities | {"amount": 51108000000.0} | 2023-12-31 | esef |
| ifrs:InsuranceContractsIssuedThatAreLiabilities | {"amount": 47194000000.0} | 2022-12-31 | esef |
| ifrs:InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedRecognisedInProfitOrLoss | {"amount": -1286000000.0} | 2023-12-31 | esef |
| ifrs:InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedRecognisedInProfitOrLoss | {"amount": -838000000.0} | 2022-12-31 | esef |
| ifrs:InsuranceRevenue | {"amount": 9571000000.0} | 2023-12-31 | esef |
| ifrs:InsuranceRevenue | {"amount": 8549000000.0} | 2022-12-31 | esef |
| ifrs:InsuranceServiceExpensesFromInsuranceContractsIssued | {"amount": 9405000000.0} | 2023-12-31 | esef |
| ifrs:InsuranceServiceExpensesFromInsuranceContractsIssued | {"amount": 7307000000.0} | 2022-12-31 | esef |
| ifrs:InsuranceServiceResult | {"amount": 1074000000.0} | 2022-12-31 | esef |
| ifrs:InsuranceServiceResult | {"amount": 407000000.0} | 2023-12-31 | esef |
| ifrs:IntangibleAssetsAndGoodwill | {"amount": 1367000000.0} | 2023-12-31 | esef |
| ifrs:IntangibleAssetsAndGoodwill | {"amount": 1143100000.0} | 2022-12-31 | esef |
| ifrs:IntangibleAssetsAndGoodwill | {"amount": 962900000.0} | 2021-12-31 | esef |
| ifrs:IntangibleAssetsAndGoodwill | {"amount": 920600000.0} | 2020-12-31 | esef |
| ifrs:IntangibleAssetsOtherThanGoodwill | {"amount": 541100000.0} | 2022-12-31 | esef |
| ifrs:IntangibleAssetsOtherThanGoodwill | {"amount": 449300000.0} | 2021-12-31 | esef |
| ifrs:IntangibleAssetsOtherThanGoodwill | {"amount": 407000000.0} | 2020-12-31 | esef |
| ifrs:InterestIncomeForFinancialAssetsNotAtFairValueThroughProfitOrLoss | {"amount": 1368100000.0} | 2021-12-31 | esef |
| ifrs:InterestIncomeForFinancialAssetsNotAtFairValueThroughProfitOrLoss | {"amount": 1348500000.0} | 2020-12-31 | esef |
| ifrs:InterestIncomeForFinancialAssetsNotAtFairValueThroughProfitOrLoss | {"amount": 1512300000.0} | 2022-12-31 | esef |
| ifrs:InterestPaidClassifiedAsOperatingActivities | {"amount": 130000000.0} | 2023-12-31 | esef |
| ifrs:InterestPaidClassifiedAsOperatingActivities | {"amount": 100000000.0} | 2022-12-31 | esef |
| ifrs:InterestReceivedClassifiedAsOperatingActivities | {"amount": 984000000.0} | 2022-12-31 | esef |
| ifrs:InterestReceivedClassifiedAsOperatingActivities | {"amount": 1013000000.0} | 2023-12-31 | esef |
| ifrs:InterestRevenueCalculatedUsingEffectiveInterestMethod | {"amount": 1434000000.0} | 2023-12-31 | esef |
| ifrs:InterestRevenueCalculatedUsingEffectiveInterestMethod | {"amount": 1401000000.0} | 2022-12-31 | esef |
| ifrs:InvestmentProperty | {"amount": 2364000000.0} | 2023-12-31 | esef |
| ifrs:InvestmentProperty | {"amount": 2359100000.0} | 2022-12-31 | esef |
| ifrs:InvestmentProperty | {"amount": 2155800000.0} | 2021-12-31 | esef |