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Consolidated Balance Sheets (Parenthetical)
$ in Millions
Mar. 31, 2022
USD ($)
shares
Mar. 31, 2022
SFr / shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2021
SFr / shares
Allowance for credit losses | $ $ 91   $ 90  
Common stock, par or stated value per share | SFr / shares   SFr 0.10   SFr 0.10
Ordinary shares, authorized 2,495,000,000   2,495,000,000  
Ordinary shares, issued 1,216,000,000   1,209,000,000  
Treasury shares 106,000,000   106,000,000