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Consolidated Statement of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Statement of Comprehensive Income [Abstract]        
Foreign currency translation, taxes $ 18 $ (14) $ 63 $ (20)
Change in net unrealized gains (losses) on available-for-sale securities, taxes (39) 4 (214) 171
Change in net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, taxes 4 2 3 0
Change in net unrealized gains (losses) on cash flow hedges, taxes (4) 8 (8) 55
Change in unrealized gains (losses) on retirement plans, taxes $ 1 $ 0 $ 5 $ 5