Premises, Equipment and Leasehold Improvements (Depreciation and Amortization Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Depreciation	$ 912	$ 900	$ 899
Amortization	139	138	130
Total depreciation and amortization	$ 1,051	$ 1,038	$ 1,029