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Premises, Equipment and Leasehold Improvements (Premises, Equipment and Leasehold Improvements) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Abstract]    
Total premises, equipment and leasehold improvements $ 17,769 $ 16,651
Accumulated depreciation and amortization (9,015) (8,058)
Net book value $ 8,754 $ 8,593