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Equity (Details 3) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of changes in equity [abstract]      
Treasury shares acquired to be cancelled (126.2) (30.7) (32.6)
Shares acquired for cancellation, equity impact $ (10,787) $ (2,775) $ (2,897)
Other share purchases (1.4) (1.5) (1.7)
Other share purchases, equity impact $ (123) $ (145) $ (159)
Purchase of treasury shares (127.6) (32.2) (34.3)
Purchase of treasury shares, equity impact $ (10,910) $ (2,920) $ (3,056)
Exercise of options and employee transactions shares 1.9 0.6 14.7
Exercise of options and employee transactions, equity impact $ 88 $ 39 $ 806
Equity based compensation shares 10.4 9.6 11.0
Equity-based compensation, equity impact $ 854 $ 745 $ 730
Shares delivered to divested business employees 0.0 0.1 0.4
Shares delivered to divested business employees, equity impact $ 5 $ 17 $ 30
Total number of outstanding treasury shares (115.3) (21.9) (8.2)
Total equity impact of treasury share movements $ (9,963) $ (2,119) $ (1,490)