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Debt, cash and cash equivalents and lease liabilities - Disclosure of Movement In Total Debt (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of debt [line items] |  |  |  |
Borrowings at beginning of period |  | € 19,218 | € 20,250 | € 22,631
Repayments |  | (3,684) | (2,718) | (2,241)
New borrowings |  | 48 | 1,549 | 0
Other cash flows |  | 895 | (330) | (812)
Currency translation differences |  | (22) | 442 | 381
Reclassification from non-current to current |  | 0 | 7 | 0
Other items |  | 76 | 18 | 291
Borrowings at end of period |  | 16,531 | 19,218 | 20,250
Net change in short-term debt and other financial instruments | [1] | 765 | 215 | (414)
Net change in borrowings through change in scope of consolidation |  |  |  | 299
Commercial paper program in USA |  |  |  |
Disclosure of debt [line items] |  |  |  |
Net change in short-term debt and other financial instruments |  | 946 |  |
Long-term debt |  |  |  |
Disclosure of debt [line items] |  |  |  |
Borrowings at beginning of period |  | 14,857 | 17,123 | 19,745
Repayments |  | (12) | (11) | (38)
New borrowings |  | 48 | 1,549 | 0
Other cash flows |  | 0 | 0 | 0
Currency translation differences |  | (30) | 56 | 124
Reclassification from non-current to current |  | (604) | (3,632) | (2,704)
Other items |  | 88 | (228) | (4)
Borrowings at end of period |  | 14,347 | 14,857 | 17,123
Short-term debt and current portion of long-term debt |  |  |  |
Disclosure of debt [line items] |  |  |  |
Borrowings at beginning of period |  | 4,174 | 3,183 | 2,767
Repayments |  | (3,672) | (2,707) | (2,203)
New borrowings |  | 0 | 0 | 0
Other cash flows |  | 903 | 43 | (615)
Currency translation differences |  | (21) | 20 | 248
Reclassification from non-current to current |  | 604 | 3,632 | 2,704
Other items |  | 57 | 3 | 282
Borrowings at end of period |  | 2,045 | 4,174 | 3,183
Interest rate and currency derivatives used to manage debt |  |  |  |
Disclosure of debt [line items] |  |  |  |
Borrowings at beginning of period |  | 187 | (56) | 119
Repayments |  | 0 | 0 | 0
New borrowings |  | 0 | 0 | 0
Other cash flows |  | (8) | (373) | (197)
Currency translation differences |  | 29 | 366 | 9
Reclassification from non-current to current |  | 0 | 7 | 0
Other items |  | (69) | 243 | 13
Borrowings at end of period |  | € 139 | € 187 | € (56)
[1] | For 2023, this line item includes €946 million related to the US commercial paper program. For 2023, 2022 and 2021, it also includes realized foreign exchange differences on (i) cash and cash equivalents in non-functional currencies (primarily the US dollar) and (ii) derivative instruments used to manage such cash and cash equivalents.

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