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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Statement of Comprehensive Income [Abstract]      
Net income $ 2,940 $ 4,374 $ 5,422
Other comprehensive income (loss), net of tax      
Unrealized gains (losses) on available-for-sale investment securities, net of tax 99 (250) (170)
Unrealized gains (losses) on cash flow hedges, net of tax 6 (5) 3
Unrealized pension and post-retirement plan gains, net of tax 9 10 28
Other comprehensive (loss) income, net 114 (245) (139)
Comprehensive income $ 3,054 $ 4,129 $ 5,283