| Fact | Value | Period | Source |
|---|
| cash_and_equivalents | {"amount": 8051000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2024-12-31 | esef |
| cash_and_equivalents | {"amount": 6801000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2023-12-31 | esef |
| cash_and_equivalents | {"amount": 11041000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2022-12-31 | esef |
| cash_and_equivalents | {"amount": 8858000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2021-12-31 | esef |
| cash_and_equivalents | {"amount": 5906000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2021-01-01 | esef |
| cash_and_equivalents | {"amount": 5906000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2020-12-31 | esef |
| cash_and_equivalents | {"amount": 9029000000.0, "concept": "ifrs-full:CashAndCashEquivalents"} | 2020-01-01 | esef |
| cashflow_financing | {"amount": -7989000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2024-12-31 | esef |
| cashflow_financing | {"amount": -8361000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2023-12-31 | esef |
| cashflow_financing | {"amount": -3972000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2020-12-31 | esef |
| cashflow_financing | {"amount": 7369000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2022-12-31 | esef |
| cashflow_financing | {"amount": 3931000000.0, "concept": "ifrs-full:CashFlowsFromUsedInFinancingActivities"} | 2021-12-31 | esef |
| cashflow_investing | {"amount": -10117000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2020-12-31 | esef |
| cashflow_investing | {"amount": -13626000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2022-12-31 | esef |
| cashflow_investing | {"amount": -4108000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2024-12-31 | esef |
| cashflow_investing | {"amount": -10610000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2023-12-31 | esef |
| cashflow_investing | {"amount": -10875000000.0, "concept": "ifrs-full:CashFlowsFromUsedInInvestingActivities"} | 2021-12-31 | esef |
| cashflow_operating | {"amount": 13223000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2024-12-31 | esef |
| cashflow_operating | {"amount": 14620000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2023-12-31 | esef |
| cashflow_operating | {"amount": 11508000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2020-12-31 | esef |
| cashflow_operating | {"amount": 8674000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2022-12-31 | esef |
| cashflow_operating | {"amount": 9915000000.0, "concept": "ifrs-full:CashFlowsFromUsedInOperatingActivities"} | 2021-12-31 | esef |
| entity_legal_form | {"value": "P418", "elf_code": "P418"} | | gleif |
| eps_basic | {"amount": 0.15, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2022-12-31 | esef |
| eps_basic | {"amount": 0.67, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2024-12-31 | esef |
| eps_basic | {"amount": 0.32, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2023-12-31 | esef |
| eps_basic | {"amount": 0.31, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2021-12-31 | esef |
| eps_basic | {"amount": 0.26, "concept": "ifrs-full:BasicEarningsLossPerShare"} | 2020-12-31 | esef |
| eps_diluted | {"amount": 0.15, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2022-12-31 | esef |
| eps_diluted | {"amount": 0.67, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2024-12-31 | esef |
| eps_diluted | {"amount": 0.32, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2023-12-31 | esef |
| eps_diluted | {"amount": 0.31, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2021-12-31 | esef |
| eps_diluted | {"amount": 0.26, "concept": "ifrs-full:DilutedEarningsLossPerShare"} | 2020-12-31 | esef |
| headquarters_address | {"city": "Roma", "region": "IT-RM", "street": "VIALE REGINA MARGHERITA 137", "country": "I | | gleif |
| ifrs:AdjustmentsForDecreaseIncreaseInContractAssets | {"amount": 15000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInContractAssets | {"amount": 20000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInContractAssets | {"amount": -107000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInContractAssets | {"amount": 56000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInInventories | {"amount": -2166000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInInventories | {"amount": 558000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInInventories | {"amount": 435000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInInventories | {"amount": -649000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInInventories | {"amount": -8000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"amount": -2783000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"amount": 490000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"amount": -2487000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"amount": -4951000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable | {"amount": -1350000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 8809000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 7249000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 8457000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 8691000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss | {"amount": 7163000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForFinanceIncomeCost | {"amount": -2499000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForFinanceIncomeCost | {"amount": -3401000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForFinanceIncomeCost | {"amount": -3437000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForFinanceIncomeCost | {"amount": -2751000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForFinanceIncomeCost | {"amount": -2693000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables | {"amount": 1288000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables | {"amount": 1323000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables | {"amount": 1355000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables | {"amount": 1196000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables | {"amount": 1285000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForIncomeTaxExpense | {"amount": 3470000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForIncomeTaxExpense | {"amount": 3654000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForIncomeTaxExpense | {"amount": 2807000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncomeTaxExpense | {"amount": 1643000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"amount": 209000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"amount": 172000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"amount": 75000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInContractLiabilities | {"amount": 254000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"amount": 1333000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"amount": -2451000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"amount": -1165000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"amount": 4357000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForIncreaseDecreaseInTradeAccountPayable | {"amount": 698000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets | {"amount": -355000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets | {"amount": -2313000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets | {"amount": 369000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets | {"amount": -1771000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets | {"amount": -1000000.0} | 2020-12-31 | esef |
| ifrs:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod | {"amount": 571000000.0} | 2021-12-31 | esef |
| ifrs:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod | {"amount": 23000000.0} | 2022-12-31 | esef |
| ifrs:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod | {"amount": -210000000.0} | 2024-12-31 | esef |
| ifrs:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod | {"amount": 17000000.0} | 2023-12-31 | esef |
| ifrs:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod | {"amount": -299000000.0} | 2020-12-31 | esef |
| ifrs:Assets | {"amount": 187139000000.0} | 2024-12-31 | esef |
| ifrs:Assets | {"amount": 195224000000.0} | 2023-12-31 | esef |
| ifrs:Assets | {"amount": 219618000000.0} | 2022-12-31 | esef |
| ifrs:Assets | {"amount": 206940000000.0} | 2021-12-31 | esef |
| ifrs:Assets | {"amount": 163453000000.0} | 2020-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.32} | 2023-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.15} | 2022-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.67} | 2024-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.31} | 2021-12-31 | esef |
| ifrs:BasicEarningsLossPerShare | {"amount": 0.26} | 2020-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromContinuingOperations | {"amount": 0.67} | 2024-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromContinuingOperations | {"amount": 0.36} | 2023-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromContinuingOperations | {"amount": 0.26} | 2020-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromContinuingOperations | {"amount": 0.35} | 2022-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromContinuingOperations | {"amount": 0.3} | 2021-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromDiscontinuedOperations | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromDiscontinuedOperations | {"amount": -0.04} | 2023-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromDiscontinuedOperations | {"amount": 0.0} | 2020-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromDiscontinuedOperations | {"amount": -0.2} | 2022-12-31 | esef |
| ifrs:BasicEarningsLossPerShareFromDiscontinuedOperations | {"amount": 0.01} | 2021-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 8051000000.0} | 2024-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 6801000000.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 11041000000.0} | 2022-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 8858000000.0} | 2021-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 5906000000.0} | 2021-01-01 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 5906000000.0} | 2020-12-31 | esef |
| ifrs:CashAndCashEquivalents | {"amount": 9029000000.0} | 2020-01-01 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 6000000.0} | 2024-12-31 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 261000000.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 98000000.0} | 2023-01-01 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 98000000.0} | 2022-12-31 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 44000000.0} | 2022-01-01 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 44000000.0} | 2021-12-31 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 29000000.0} | 2021-01-01 | esef |
| ifrs:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale | {"amount": 29000000.0} | 2020-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 8195000000.0} | 2024-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 7143000000.0} | 2023-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 11543000000.0} | 2022-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 8990000000.0} | 2021-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 6002000000.0} | 2020-12-31 | esef |
| ifrs:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition | {"amount": 9080000000.0} | 2019-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 5622000000.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 2032000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 2083000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 61000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 154000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -7989000000.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -8361000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": -3972000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": 7369000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivities | {"amount": 3931000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations | {"amount": 656000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations | {"amount": -16000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInFinancingActivitiesDiscontinuedOperations | {"amount": 118000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -13626000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -4108000000.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -10610000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -10875000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivities | {"amount": -10117000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations | {"amount": 442000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations | {"amount": 351000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations | {"amount": 453000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivities | {"amount": 13223000000.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivities | {"amount": 14620000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivities | {"amount": 11508000000.0} | 2020-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivities | {"amount": 8674000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivities | {"amount": 9915000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations | {"amount": -132000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations | {"amount": 391000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:CashFlowsFromUsedInOperatingActivitiesDiscontinuedOperations | {"amount": 280000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 1275000000.0} | 2022-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 0.0} | 2024-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 17000000.0} | 2023-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 283000000.0} | 2021-12-31 | esef |
| ifrs:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities | {"amount": 33000000.0} | 2020-12-31 | esef |
| ifrs:ChangesInEquity | {"amount": 0.0} | 2022-12-31 | esef |
| ifrs:ChangesInEquity | {"amount": 0.0} | 2023-12-31 | esef |
| ifrs:ChangesInEquity | {"amount": -1000000.0} | 2020-12-31 | esef |
| ifrs:ChangesInEquity | {"amount": 0.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 2580000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 6188000000.0} | 2024-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 6484000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": 2633000000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncome | {"amount": -1639000000.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 913000000.0} | 2024-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 1312000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 71000000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": 922000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToNoncontrollingInterests | {"amount": -611000000.0} | 2020-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 2562000000.0} | 2021-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 1658000000.0} | 2022-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 5275000000.0} | 2024-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": 5172000000.0} | 2023-12-31 | esef |
| ifrs:ComprehensiveIncomeAttributableToOwnersOfParent | {"amount": -1028000000.0} | 2020-12-31 | esef |
| ifrs:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners | {"amount": 40872000000.0} | 2024-12-31 | esef |
| ifrs:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners | {"amount": 44616000000.0} | 2023-12-31 | esef |
| ifrs:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners | {"amount": 66063000000.0} | 2022-12-31 | esef |
| ifrs:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners | {"amount": 65132000000.0} | 2021-12-31 | esef |
| ifrs:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners | {"amount": 33137000000.0} | 2020-12-31 | esef |
| ifrs:CurrentContractAssets | {"amount": 193000000.0} | 2024-12-31 | esef |
| ifrs:CurrentContractAssets | {"amount": 212000000.0} | 2023-12-31 | esef |
| ifrs:CurrentContractAssets | {"amount": 106000000.0} | 2022-12-31 | esef |
| ifrs:CurrentContractAssets | {"amount": 121000000.0} | 2021-12-31 | esef |
| ifrs:CurrentContractAssets | {"amount": 176000000.0} | 2020-12-31 | esef |
| ifrs:CurrentContractLiabilities | {"amount": 2448000000.0} | 2024-12-31 | esef |
| ifrs:CurrentContractLiabilities | {"amount": 2126000000.0} | 2023-12-31 | esef |
| ifrs:CurrentContractLiabilities | {"amount": 1775000000.0} | 2022-12-31 | esef |
| ifrs:CurrentContractLiabilities | {"amount": 1433000000.0} | 2021-12-31 | esef |
| ifrs:CurrentContractLiabilities | {"amount": 1275000000.0} | 2020-12-31 | esef |
| ifrs:CurrentDerivativeFinancialAssets | {"amount": 3512000000.0} | 2024-12-31 | esef |
| ifrs:CurrentDerivativeFinancialAssets | {"amount": 6407000000.0} | 2023-12-31 | esef |