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Deposits - Composition of Deposits (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Maturities of Time Deposits [Abstract]    
Savings $ 21,971 $ 26,457
Time deposits 2,887 3,500
Other interest-bearing deposits 15,165 17,055
Interest-bearing deposits 40,023 47,012
Noninterest-bearing deposits 23,466 27,883
Total deposits $ 63,489 $ 74,895