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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 3,849 $ 3,951
Reclassification into earnings, tax 0 0
Change in fair value, tax 0 0
Ending balance 3,598 3,714
Available-for-sale, Including Noncontrolling Interest    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 0 0
Reclassifications into earnings, net of taxes 0 0
Change in fair value (1) 0
Ending balance $ (1) $ 0