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Premises and Equipment Summary of Premises and Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Land $ 78 $ 81
Buildings and improvements 804 768
Furniture and equipment 476 536
Total cost 1,358 1,385
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (885) (940)
Premises and equipment $ 473 $ 445