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Deposits - Summary (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Deposits [Abstract]    
Savings and demand deposits $ 317,129 $ 332,747
Time deposits 20,994 14,827
Total 338,123 347,574
Deposits subject to FDIC insurance 239,194 230,894
Deposits not subject to FDIC insurance $ 98,929 $ 116,680