| Fact | Value | Period | Source |
|---|
| cash_and_equivalents | {"amount": 152281000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2025-12-31 | esef |
| cash_and_equivalents | {"amount": 192208000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2024-12-31 | esef |
| cash_and_equivalents | {"amount": 220342000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2023-12-31 | esef |
| cash_and_equivalents | {"amount": 223073000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2022-12-31 | esef |
| cash_and_equivalents | {"amount": 210689000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2021-12-31 | esef |
| cash_and_equivalents | {"amount": 153839000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2020-12-31 | esef |
| cash_and_equivalents | {"amount": 101067000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2019-12-31 | esef |
| cash_and_equivalents | {"amount": 113663000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2018-12-31 | esef |
| cashflow_financing | {"amount": -14203000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2025-12-31 | esef |
| cashflow_financing | {"amount": -5510000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2024-12-31 | esef |
| cashflow_financing | {"amount": -2058000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2023-12-31 | esef |
| cashflow_financing | {"amount": -9964000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2022-12-31 | esef |
| cashflow_financing | {"amount": -1322000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2021-12-31 | esef |
| cashflow_financing | {"amount": -1909000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2020-12-31 | esef |
| cashflow_financing | {"amount": -10122000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2019-12-31 | esef |
| cashflow_investing | {"amount": 534000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2025-12-31 | esef |
| cashflow_investing | {"amount": -3712000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2024-12-31 | esef |
| cashflow_investing | {"amount": -5366000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2023-12-31 | esef |
| cashflow_investing | {"amount": -3898000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2022-12-31 | esef |
| cashflow_investing | {"amount": -3715000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2021-12-31 | esef |
| cashflow_investing | {"amount": -7220000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2020-12-31 | esef |
| cashflow_investing | {"amount": -7229000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2019-12-31 | esef |
| cashflow_operating | {"amount": -14835000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2025-12-31 | esef |
| cashflow_operating | {"amount": -24155000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2024-12-31 | esef |
| cashflow_operating | {"amount": 5015000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2023-12-31 | esef |
| cashflow_operating | {"amount": 27706000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2022-12-31 | esef |
| cashflow_operating | {"amount": 56691000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2021-12-31 | esef |
| cashflow_operating | {"amount": 66153000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2020-12-31 | esef |
| cashflow_operating | {"amount": 3389000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2019-12-31 | esef |
| entity_legal_form | {"value": "5RDO", "elf_code": "5RDO"} | | gleif |
| eps_basic | {"amount": 0.905, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2025-12-31 | esef |
| eps_basic | {"amount": 0.771, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2024-12-31 | esef |
| eps_basic | {"amount": 0.654, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2023-12-31 | esef |
| eps_basic | {"amount": 0.539, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2022-12-31 | esef |
| eps_basic | {"amount": 0.438, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2021-12-31 | esef |
| eps_basic | {"amount": -0.538, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2020-12-31 | esef |
| eps_basic | {"amount": 0.347, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2019-12-31 | esef |
| eps_diluted | {"amount": 0.9, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2025-12-31 | esef |
| eps_diluted | {"amount": 0.768, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2024-12-31 | esef |
| eps_diluted | {"amount": 0.651, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2023-12-31 | esef |
| eps_diluted | {"amount": 0.537, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2022-12-31 | esef |
| eps_diluted | {"amount": 0.436, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2021-12-31 | esef |
| eps_diluted | {"amount": -0.538, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2020-12-31 | esef |
| eps_diluted | {"amount": 0.346, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2019-12-31 | esef |
| headquarters_address | {"city": "SANTANDER", "region": "ES-S", "street": "PASEO DE PEREDA 9-12", "country": "ES", | | gleif |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets | {"amount": 50000000.0} | 2025-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets | {"amount": -704000000.0} | 2024-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets | {"amount": -788000000.0} | 2023-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets | {"amount": -3749000000.0} | 2022-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets | {"amount": 410000000.0} | 2021-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets | {"amount": 1980000000.0} | 2020-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountAssets | {"amount": 1702000000.0} | 2019-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities | {"amount": 49000000.0} | 2025-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities | {"amount": -9000000.0} | 2024-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities | {"amount": 55000000.0} | 2023-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities | {"amount": -117000000.0} | 2022-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities | {"amount": 248000000.0} | 2021-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities | {"amount": 286000000.0} | 2020-12-31 | esef |
| ifrs:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities | {"amount": 269000000.0} | 2019-12-31 | esef |
| ifrs:AccumulatedOtherComprehensiveIncome | {"amount": -37974000000.0} | 2025-12-31 | esef |
| ifrs:AccumulatedOtherComprehensiveIncome | {"amount": -36595000000.0} | 2024-12-31 | esef |
| ifrs:AccumulatedOtherComprehensiveIncome | {"amount": -35020000000.0} | 2023-12-31 | esef |
| ifrs:AccumulatedOtherComprehensiveIncome | {"amount": -35628000000.0} | 2022-12-31 | esef |
| ifrs:AccumulatedOtherComprehensiveIncome | {"amount": -32719000000.0} | 2021-12-31 | esef |
| ifrs:AccumulatedOtherComprehensiveIncome | {"amount": -33144000000.0} | 2020-12-31 | esef |
| ifrs:AccumulatedOtherComprehensiveIncome | {"amount": -24168000000.0} | 2019-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading | {"amount": -25776000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading | {"amount": -62460000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading | {"amount": -18332000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading | {"amount": -30837000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading | {"amount": -2064000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading | {"amount": -12390000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading | {"amount": -15450000000.0} | 2019-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtAmortisedCost | {"amount": -97964000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtAmortisedCost | {"amount": -45995000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtAmortisedCost | {"amount": -60525000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome | {"amount": 6733000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome | {"amount": -10225000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome | {"amount": 4470000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss | {"amount": -146000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss | {"amount": 1850000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInFinancialAssetsMeasuredAtFairValueThroughProfitOrLoss | {"amount": -874000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": -237000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": -1135000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": 565000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": -1542000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": 7058000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": 506000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInOtherAssets | {"amount": 457000000.0} | 2019-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 3178000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 3294000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 3184000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 2985000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 2756000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 2810000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpense | {"amount": 3001000000.0} | 2019-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading | {"amount": 20654000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading | {"amount": 34256000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading | {"amount": 5450000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading | {"amount": 29533000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading | {"amount": -1386000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading | {"amount": 7880000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesHeldForTrading | {"amount": 6968000000.0} | 2019-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost | {"amount": 35719000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost | {"amount": 34164000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtAmortisedCost | {"amount": 40138000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss | {"amount": 5858000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss | {"amount": -3854000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInFinancialLiabilitiesMeasuredAtFairValueThroughProfitOrLoss | {"amount": -11000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": 298000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -6950000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": 503000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -3479000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -6467000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -3178000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInOtherLiabilities | {"amount": -7263000000.0} | 2019-12-31 | esef |
| ifrs:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"amount": 31347000000.0} | 2025-12-31 | esef |
| ifrs:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"amount": 28361000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"amount": 26948000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"amount": 23970000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"amount": 21363000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"amount": 37836000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital | {"amount": 23990000000.0} | 2019-12-31 | esef |
| ifrs:AdministrativeExpense | {"amount": 21533000000.0} | 2025-12-31 | esef |
| ifrs:AdministrativeExpense | {"amount": 22740000000.0} | 2024-12-31 | esef |
| ifrs:AdministrativeExpense | {"amount": 22241000000.0} | 2023-12-31 | esef |
| ifrs:AdministrativeExpense | {"amount": 20918000000.0} | 2022-12-31 | esef |
| ifrs:AdministrativeExpense | {"amount": 18659000000.0} | 2021-12-31 | esef |
| ifrs:AdministrativeExpense | {"amount": 18320000000.0} | 2020-12-31 | esef |
| ifrs:AdministrativeExpense | {"amount": 20279000000.0} | 2019-12-31 | esef |
| ifrs:AmountsRemovedFromEquityAndIncludedInCarryingAmountOfNonfinancialAssetLiabilityWhoseAcquisitionOrIncurrenceWasHedgedHighlyProbableForecastTransactionBeforeTax | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:AmountsRemovedFromEquityAndIncludedInCarryingAmountOfNonfinancialAssetLiabilityWhoseAcquisitionOrIncurrenceWasHedgedHighlyProbableForecastTransactionBeforeTax | {"amount": 0.0} | 2023-12-31 | esef |
| ifrs:AmountsRemovedFromEquityAndIncludedInCarryingAmountOfNonfinancialAssetLiabilityWhoseAcquisitionOrIncurrenceWasHedgedHighlyProbableForecastTransactionBeforeTax | {"amount": 0.0} | 2022-12-31 | esef |
| ifrs:AmountsRemovedFromEquityAndIncludedInCarryingAmountOfNonfinancialAssetLiabilityWhoseAcquisitionOrIncurrenceWasHedgedHighlyProbableForecastTransactionBeforeTax | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:AmountsRemovedFromEquityAndIncludedInCarryingAmountOfNonfinancialAssetLiabilityWhoseAcquisitionOrIncurrenceWasHedgedHighlyProbableForecastTransactionBeforeTax | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:AmountsRemovedFromEquityAndIncludedInCarryingAmountOfNonfinancialAssetLiabilityWhoseAcquisitionOrIncurrenceWasHedgedHighlyProbableForecastTransactionBeforeTax | {"amount": 0.0} | 2019-12-31 | esef |
| ifrs:Assets | {"amount": 1867515000000.0} | 2025-12-31 | esef |
| ifrs:Assets | {"amount": 1837081000000.0} | 2024-12-31 | esef |
| ifrs:Assets | {"amount": 1797062000000.0} | 2023-12-31 | esef |
| ifrs:Assets | {"amount": 1734659000000.0} | 2022-12-31 | esef |
| ifrs:Assets | {"amount": 1595835000000.0} | 2021-12-31 | esef |
| ifrs:Assets | {"amount": 1508250000000.0} | 2020-12-31 | esef |
| ifrs:Assets | {"amount": 1522695000000.0} | 2019-12-31 | esef |
| ifrs:AssetsUnderInsuranceContractsAndReinsuranceContractsIssued | {"amount": 237000000.0} | 2023-12-31 | esef |
| ifrs:AssetsUnderInsuranceContractsAndReinsuranceContractsIssued | {"amount": 308000000.0} | 2022-12-31 | esef |
| ifrs:AssetsUnderInsuranceContractsAndReinsuranceContractsIssued | {"amount": 283000000.0} | 2021-12-31 | esef |
| ifrs:AssetsUnderInsuranceContractsAndReinsuranceContractsIssued | {"amount": 261000000.0} | 2020-12-31 | esef |
| ifrs:AssetsUnderInsuranceContractsAndReinsuranceContractsIssued | {"amount": 292000000.0} | 2019-12-31 | esef |
| ifrs:BankOverdraftsClassifiedAsCashEquivalents | {"amount": 0.0} | 2025-12-31 | esef |
| ifrs:BankOverdraftsClassifiedAsCashEquivalents | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:BankOverdraftsClassifiedAsCashEquivalents | {"amount": 0.0} | 2023-12-31 | esef |
| ifrs:BankOverdraftsClassifiedAsCashEquivalents | {"amount": 0.0} | 2022-12-31 | esef |
| ifrs:BankOverdraftsClassifiedAsCashEquivalents | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:BankOverdraftsClassifiedAsCashEquivalents | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:BankOverdraftsClassifiedAsCashEquivalents | {"amount": 0.0} | 2019-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.905} | 2025-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.771} | 2024-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.654} | 2023-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.539} | 2022-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.438} | 2021-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": -0.538} | 2020-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.347} | 2019-12-31 | esef |
| ifrs:CancellationOfTreasuryShares | {"amount": 800000000.0} | 2025-12-31 | esef |
| ifrs:CancellationOfTreasuryShares | {"amount": 762000000.0} | 2024-12-31 | esef |
| ifrs:CancellationOfTreasuryShares | {"amount": 819000000.0} | 2023-12-31 | esef |
| ifrs:CancellationOfTreasuryShares | {"amount": 570000000.0} | 2022-12-31 | esef |
| ifrs:CancellationOfTreasuryShares | {"amount": 843000000.0} | 2021-12-31 | esef |
| ifrs:CancellationOfTreasuryShares | {"amount": 721000000.0} | 2020-12-31 | esef |
| ifrs:CancellationOfTreasuryShares | {"amount": 950000000.0} | 2019-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 135330000000.0} | 2025-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 170914000000.0} | 2024-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 199932000000.0} | 2023-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 200830000000.0} | 2022-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 193102000000.0} | 2021-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 137047000000.0} | 2020-12-31 | esef |
| ifrs:CashAndBankBalancesAtCentralBanks | {"amount": 75353000000.0} | 2019-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 152281000000.0} | 2025-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 192208000000.0} | 2024-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 220342000000.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 223073000000.0} | 2022-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 210689000000.0} | 2021-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 153839000000.0} | 2020-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 101067000000.0} | 2019-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 113663000000.0} | 2018-12-31 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 2515000000.0} | 2025-12-31 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 0.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 154796000000.0} | 2025-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 192208000000.0} | 2024-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 220342000000.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 223073000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 734000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 54000000.0} | 2025-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 8000000.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 885000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 6000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 1775000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 218000000.0} | 2019-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -14203000000.0} | 2025-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -5510000000.0} | 2024-12-31 | esef |