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Other Income (Loss) (Schedule Of Components Of Other Income) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other Income (Loss) [Abstract]      
Principal transactions $ 22 $ 86 $ 67
Gains (losses) from currency diversification strategy, net (37) (19) (60)
Other, net 13 (8)  
Other income (loss) $ (2) $ 59 $ 7