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Consolidated shareholders’ equity - Summary of Repurchases Program (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
2022 |  |  |
Disclosure of classes of share capital [line items] |  |  |
Number of shares (in shares) | 1,510,000 |  |
Value | € 137 |  |
2021 |  |  |
Disclosure of classes of share capital [line items] |  |  |
Number of shares (in shares) | 3,976,992 | 2,765,388 |
Value | € 360 | € 242 |
2020 |  |  |
Disclosure of classes of share capital [line items] |  |  |
Number of shares (in shares) |  | 1,758,569 | 5,685,426
Value |  | € 140 | € 461
2019 |  |  |
Disclosure of classes of share capital [line items] |  |  |
Number of shares (in shares) |  |  | 3,982,939
Value |  |  | € 361

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