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Equity - Share capital and premium additional information (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 shares | Dec. 31, 2023 € / shares | Dec. 31, 2023 USD ($) shares
Disclosure of classes of share capital [line items] |  |  |  |  |
Issue of shares (in shares) | 5,000 | 2,935,000 | 3,397,000 |  |
Issue of contingent convertible capital securities | $ | $ 864 | $ 750 |  |  |
Authorised share capital, ordinary shares (in shares) |  | 9,142,000,000 | 14,729,000,000 |  | 9,142,000,000
Issued share capital, ordinary shares (in shares) |  | 3,726,539,000 | 3,904,065,000 |  | 3,498,194,000
Treasury shares |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Issue of shares (in shares) | 464,000 | (312,000) | 102,000 |  |
Issued share capital, ordinary shares (in shares) |  | 107,400,000 | 128,300,000 |  | 154,600,000
Perpetual additional tier 1 contingent capital securities |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Issue of shares (in shares) | 0.0 | 2,900,000 | 3,400,000 |  |
Issued capital | $ |  | $ 6,750 |  |  | $ 7,750
Ordinary shares |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |
Par value (in eur per share) | € / shares |  |  |  | € 0.01 |

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