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Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Abstract]    
Computer software $ 581 $ 408
Computer hardware 116 102
Leasehold improvements 164 149
Furniture and equipment 59 53
Building 3 3
Total 923 715
Accumulated depreciation and amortization (529) (445)
Premises and equipment, net $ 394 $ 270