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Derivative Financial Instruments and Risk Management Policies - Details about Hedged Items by Fair Value Hedges (Details) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of detailed information about hedged items [line items] |  |
Total assets | € 100,502 | € 104,324
Financial assets and other non-current assets | 7,403 | 7,268
Receivables and other current assets | 10,445 | 10,132
Other current financial assets | 1,800 | 1,078
Non-current financial liabilities | 33,192 | 33,360
Payables and other non-current liabilities | 3,693 | 3,605
Current financial liabilities | 5,590 | 3,701
Payables and other current liabilities | 14,606 | 13,957
Designated as hedging instrument |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 314 | 281
Financial assets and other non-current assets | 68 | 124
Receivables and other current assets | 225 | 150
Other current financial assets |  | 4
Other heading of assets | 21 | 3
Total allocated liabilities | 12,103 | 10,952
Non-current financial liabilities | 11,085 | 9,858
Payables and other non-current liabilities | 50 | 44
Current financial liabilities | 263 | 191
Payables and other current liabilities | 705 | 859
Designated as hedging instrument | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 16 | (15)
Financial assets and other non-current assets | 15 | (14)
Receivables and other current assets | 1 | 0
Other current financial assets |  | (1)
Other heading of assets | 0 | 0
Designated as hedging instrument | Fair value hedges | Derivative instruments, including netting adjustments |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated liabilities | (35) | 179
Non-current financial liabilities | (50) | 187
Payables and other non-current liabilities | 1 | (1)
Current financial liabilities | 0 | 0
Payables and other current liabilities | 14 | (7)
Designated as hedging instrument | Interest rate risk |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 55 | 32
Financial assets and other non-current assets | 55 | 28
Receivables and other current assets | 0 | 0
Other current financial assets |  | 4
Other heading of assets | 0 | 0
Total allocated liabilities | 9,195 | 8,092
Non-current financial liabilities | 9,083 | 8,009
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 112 | 83
Payables and other current liabilities | 0 | 0
Designated as hedging instrument | Interest rate risk | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 15 | (15)
Financial assets and other non-current assets | 15 | (14)
Receivables and other current assets | 0 | 0
Other current financial assets |  | (1)
Other heading of assets | 0 | 0
Designated as hedging instrument | Interest rate risk | Fair value hedges | Derivative instruments, including netting adjustments |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated liabilities | (89) | 153
Non-current financial liabilities | (89) | 153
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 0 | 0
Payables and other current liabilities | 0 | 0
Designated as hedging instrument | Exchange rate risk |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 259 | 249
Financial assets and other non-current assets | 13 | 96
Receivables and other current assets | 225 | 150
Other current financial assets |  | 0
Other heading of assets | 21 | 3
Total allocated liabilities | 1,314 | 1,365
Non-current financial liabilities | 548 | 452
Payables and other non-current liabilities | 50 | 44
Current financial liabilities | 11 | 10
Payables and other current liabilities | 705 | 859
Designated as hedging instrument | Exchange rate risk | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 1 | 0
Financial assets and other non-current assets | 0 | 0
Receivables and other current assets | 1 | 0
Other current financial assets |  | 0
Other heading of assets | 0 | 0
Designated as hedging instrument | Exchange rate risk | Fair value hedges | Derivative instruments, including netting adjustments |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated liabilities | 15 | (8)
Non-current financial liabilities | 0 | 0
Payables and other non-current liabilities | 1 | (1)
Current financial liabilities | 0 | 0
Payables and other current liabilities | 14 | (7)
Designated as hedging instrument | Interest rate and exchange rate risk |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 0 | 0
Financial assets and other non-current assets | 0 | 0
Receivables and other current assets | 0 | 0
Other current financial assets |  | 0
Other heading of assets | 0 | 0
Total allocated liabilities | 1,594 | 1,495
Non-current financial liabilities | 1,454 | 1,397
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 140 | 98
Payables and other current liabilities | 0 | 0
Designated as hedging instrument | Interest rate and exchange rate risk | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 0 | 0
Financial assets and other non-current assets | 0 | 0
Receivables and other current assets | 0 | 0
Other current financial assets |  | 0
Other heading of assets | 0 | 0
Designated as hedging instrument | Interest rate and exchange rate risk | Fair value hedges | Derivative instruments, including netting adjustments |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated liabilities | 39 | 34
Non-current financial liabilities | 39 | 34
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 0 | 0
Payables and other current liabilities | 0 | 0
Of which: accumulated amount of any hedge item that have ceased to be adjusted for gains and losses | Designated as hedging instrument | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total assets | 0 | 0
Financial assets and other non-current assets | 0 | 0
Receivables and other current assets | 0 | 0
Other current financial assets |  | 0
Other heading of assets | 0 | 0
Of which: accumulated amount of any hedge item that have ceased to be adjusted for gains and losses | Designated as hedging instrument | Fair value hedges | Derivative instruments, including netting adjustments |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated liabilities | 37 | (9)
Non-current financial liabilities | 31 | 33
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 0 | 0
Payables and other current liabilities | € 6 | € (42)

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