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Consolidated shareholders’ equity - Principal Characteristics of Restricted Share Plans (Details) € / shares in Units, € in Millions | 1 Months Ended | 12 Months Ended
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Dec. 31, 2022 shares | May 31, 2022 shares | Dec. 31, 2022 EUR (€) shares € / shares | Dec. 31, 2021 EUR (€) shares € / shares | Dec. 31, 2020 EUR (€) shares € / shares
Restricted Share Plan 2022 | Performance share plan one |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Service period |  |  | 3 years |  |
Total number of shares awarded (in shares) | shares |  |  | 3,344,432 |  |
Fair value of plan at the date of grant | € |  |  | € 294 |  |
Restricted Share Plan 2022 | Performance share plan one | Without market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  | 2,000,627 |  |
Fair value per share awarded (in euros per share) |  |  | € 91.19 |  |
Restricted Share Plan 2022 | Performance share plan one | With market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  | 1,343,805 |  |
Fair value per share awarded (in euros per share) |  |  | € 86.65 |  |
Fair value per share awarded for three year service period, additional shares (in euros per share) |  |  | 49.00 |  |
Fair value per share awarded for three year service period, to chief executive officer (in euros per share) |  |  | € 84.46 |  |
Restricted Share Plan 2022 | Performance share plan two |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Service period |  |  | 3 years |  |
Total number of shares awarded (in shares) | shares |  |  | 109,981 |  |
Fair value of plan at the date of grant | € |  |  | € 8 |  |
Restricted Share Plan 2022 | Performance share plan two | Without market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  | 10,335 |  |
Fair value per share awarded (in euros per share) |  |  | € 79.17 |  |
Restricted Share Plan 2022 | Performance share plan two | With market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  | 99,646 |  |
Fair value per share awarded (in euros per share) |  |  | € 69.60 |  |
Fair value per share awarded for three year service period, additional shares (in euros per share) |  |  | 54.70 |  |
Fair value per share awarded for three year service period, to chief executive officer (in euros per share) |  |  | € 0 |  |
Restricted share plan 2021 | Performance share plan one |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Service period |  |  |  | 3 years |
Total number of shares awarded (in shares) | shares |  |  |  | 3,484,420 |
Fair value of plan at the date of grant | € |  |  |  | € 262 |
Restricted share plan 2021 | Performance share plan one | Without market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  |  | 2,209,901 |
Fair value per share awarded (in euros per share) |  |  |  | € 77.27 |
Restricted share plan 2021 | Performance share plan one | With market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  | 114,874 |  | 1,274,519 |
Fair value per share awarded (in euros per share) |  |  |  | € 71.30 |
Fair value per share awarded for three year service period, additional shares (in euros per share) |  |  |  | 0 |
Fair value per share awarded for three year service period, to chief executive officer (in euros per share) |  |  |  | € 71.30 |
Restricted share plan 2021 | Performance share plan two |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Service period |  |  |  | 3 years |
Total number of shares awarded (in shares) | shares |  |  |  | 13,521 |
Fair value of plan at the date of grant | € |  |  |  | € 1 |
Restricted share plan 2021 | Performance share plan two | Without market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  |  | 0 |
Fair value per share awarded (in euros per share) |  |  |  | € 0 |
Restricted share plan 2021 | Performance share plan two | With market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares | 9,066,000,000 |  |  | 13,521 |
Fair value per share awarded (in euros per share) |  |  |  | € 68.45 |
Fair value per share awarded for three year service period, additional shares (in euros per share) |  |  |  | 0 |
Fair value per share awarded for three year service period, to chief executive officer (in euros per share) |  |  |  | € 0 |
Restricted share plan 2020 | Performance share plan one |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Service period |  |  |  |  | 3 years
Total number of shares awarded (in shares) | shares |  |  |  |  | 3,340,501
Fair value of plan at the date of grant | € |  |  |  |  | € 270
Restricted share plan 2020 | Performance share plan one | Without market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  |  |  | 2,536,893
Fair value per share awarded (in euros per share) |  |  |  |  | € 82.36
Restricted share plan 2020 | Performance share plan one | With market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  |  |  | 803,608
Fair value per share awarded (in euros per share) |  |  |  |  | € 76.11
Fair value per share awarded for three year service period, additional shares (in euros per share) |  |  |  |  | 0
Fair value per share awarded for three year service period, to chief executive officer (in euros per share) |  |  |  |  | € 76.11
Restricted share plan 2020 | Performance share plan two |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Service period |  |  |  |  | 3 years
Total number of shares awarded (in shares) | shares |  |  |  |  | 73,027
Fair value of plan at the date of grant | € |  |  |  |  | € 5
Restricted share plan 2020 | Performance share plan two | Without market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  |  |  | 0
Fair value per share awarded (in euros per share) |  |  |  |  | € 0
Restricted share plan 2020 | Performance share plan two | With market condition |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Total number of shares awarded (in shares) | shares |  |  |  |  | 73,027
Fair value per share awarded (in euros per share) |  |  |  |  | € 63.18
Fair value per share awarded for three year service period, additional shares (in euros per share) |  |  |  |  | 0
Fair value per share awarded for three year service period, to chief executive officer (in euros per share) |  |  |  |  | € 0

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