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Consolidated Statement of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement of Comprehensive Income [Abstract]        
Foreign currency translation, taxes $ (8) $ 4 $ 45 $ (6)
Change in net unrealized gains (losses) on available-for-sale securities, taxes (14) 132 (175) 167
Change in net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, taxes (5) 1 (1) (2)
Change in net unrealized gains (losses) on cash flow hedges, taxes (4) 3 (4) 47
Change in unrealized gains (losses) on retirement plans, taxes $ 1 $ 1 $ 4 $ 5