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Income taxes - Current and deferred (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income taxes      
Current income taxes $ (19,825) $ (8,158) $ (2,450)
Deferred income taxes (2,417) (1,429) 2,132
TOTAL INCOME TAXES $ (22,242) $ (9,587) $ (318)