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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