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Deposits - Narrative (Details) - USD ($)
$ in Billions
Mar. 31, 2024
Dec. 31, 2023
Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract]    
Brokered deposits, excluding CDARS and ICS Two-Way $ 4.2 $ 2.5
Brokered deposits, excluding CDARS and ICS Two-Way, percent of total 49.10% 28.80%
Deposits attributable to CDARS and ICS two-way deposits $ 1.7