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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, 2022 | Dec. 31, 2021
--- | --- | ---
Disclosure of detailed information about hedged items [line items] |  |
Total allocated assets | € 109,642 | € 109,213
Financial assets and other non-current assets | 8,101 | 7,347
Receivables and other current assets | 9,134 | 8,287
Other current financial assets | 2,444 | 3,835
Non-current financial liabilities | 35,059 | 35,290
Non-current lease liabilities | 6,657 | 6,391
Payables and other non-current liabilities | 3,546 | 3,089
Current financial liabilities | 4,020 | 7,005
Payables and other current liabilities | 13,509 | 13,210
Designated as Hedging Instrument |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated assets | 265 | 226
Financial assets and other non-current assets | 104 | 101
Receivables and other current assets | 152 | 106
Other current financial assets | 7 |
Other heading of assets | 2 | 19
Total allocated liabilities | 11,039 | 9,998
Non-current financial liabilities | 9,657 | 8,464
Non-current lease liabilities |  | 31
Payables and other non-current liabilities | 60 | 55
Current financial liabilities | 563 | 624
Payables and other current liabilities | 759 | 824
Designated as Hedging Instrument | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated assets | 30 | 4
Financial assets and other non-current assets | 9 | 1
Receivables and other current assets | 21 | 3
Other current financial assets | 0 |
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 | (59) | 1,689
Non-current financial liabilities | (74) | 1,504
Non-current lease liabilities |  | (2)
Payables and other non-current liabilities | (2) | (3)
Current financial liabilities | 52 | 210
Payables and other current liabilities | (35) | (20)
Designated as Hedging Instrument | Interest rate risk |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated assets | 15 | 0
Financial assets and other non-current assets | 8 | 0
Receivables and other current assets | 0 | 0
Other current financial assets | 7 |
Other heading of assets | 0 | 0
Total allocated liabilities | 8,125 | 6,101
Non-current financial liabilities | 7,735 | 5,987
Non-current lease liabilities |  | 31
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 387 | 83
Payables and other current liabilities | 3 | 0
Designated as Hedging Instrument | Interest rate risk | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated assets | 8 | 0
Financial assets and other non-current assets | 8 | 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 risk | Fair value hedges | Derivative Instruments, Including Netting Adjustments |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated liabilities | (88) | 1,322
Non-current financial liabilities | (89) | 1,309
Non-current lease liabilities |  | (2)
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 0 | 15
Payables and other current liabilities | 1 | 0
Designated as Hedging Instrument | Exchange rate risk |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated assets | 250 | 226
Financial assets and other non-current assets | 96 | 101
Receivables and other current assets | 152 | 106
Other current financial assets | 0 |
Other heading of assets | 2 | 19
Total allocated liabilities | 1,295 | 1,437
Non-current financial liabilities | 468 | 558
Non-current lease liabilities |  | 0
Payables and other non-current liabilities | 60 | 55
Current financial liabilities | 11 | 0
Payables and other current liabilities | 756 | 824
Designated as Hedging Instrument | Exchange rate risk | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated assets | 22 | 4
Financial assets and other non-current assets | 1 | 1
Receivables and other current assets | 21 | 3
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 | (38) | (23)
Non-current financial liabilities | 0 | 0
Non-current lease liabilities |  | 0
Payables and other non-current liabilities | (2) | (3)
Current financial liabilities | 0 | 0
Payables and other current liabilities | (36) | (20)
Designated as Hedging Instrument | Interest rate and exchange rate risk |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated 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 | 1,619 | 2,460
Non-current financial liabilities | 1,454 | 1,919
Non-current lease liabilities |  | 0
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 165 | 541
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 allocated 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 | 67 | 390
Non-current financial liabilities | 15 | 195
Non-current lease liabilities |  | 0
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 52 | 195
Payables and other current liabilities | 0 | 0
Of which: accumulated amount of any hedge item that have cesased to be adjusted for gains and losses | Designated as Hedging Instrument | Fair value hedges |  |
Disclosure of detailed information about hedged items [line items] |  |
Total allocated 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 cesased 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 | 21 | 63
Non-current financial liabilities | 36 | 52
Non-current lease liabilities |  | 0
Payables and other non-current liabilities | 0 | 0
Current financial liabilities | 1 | 16
Payables and other current liabilities | € (16) | € (5)

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