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Time Deposits - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Time Deposits Disclosure [Abstract]    
Time deposits, $100,000 or more $ 800 $ 1,300
Time deposits, $250,000 or more $ 423 $ 661
Time deposits, average interest rate 1.55% 2.12%
Time deposits, including brokered deposits, less than $100,000 $ 290 $ 494