Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Assets, Net [Abstract]
Net unrealized losses on securities and financial instruments	$ 2,098	$ 2,417
Allowance for loan and lease losses	1,105	1,147
Lease obligations	475	508
Compensation and benefits	312	261
Allowance for unfunded lending related commitments	177	161
Accrued expenses	188	209
Other	340	384
Total gross deferred tax assets	4,695	5,087
Valuation allowance	(23)	(26)
Total deferred tax assets	4,672	5,061
Deferred tax liabilities
Leasing	919	938
Fixed assets	397	477
Right of Use Assets	412	445
Mortgage servicing rights	434	359
Goodwill and intangibles	249	252
Other	472	461
Total deferred tax liabilities	2,883	2,932
Net deferred tax asset	$ 1,789	$ 2,129