Income Taxes - Deferred Income Taxes Included in Other Assets in the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Other comprehensive income	$ 1,459	$ 1,395
Allowance for loan and lease losses	494	488
Loan origination fees and costs	199	195
Deferred compensation	115	114
Reserves	38	33
State deferred taxes	35	43
Reserves for unfunded commitments	28	35
Federal net operating loss carryforwards	7	19
State net operating loss carryforwards	6	11
Other	138	135
Total deferred tax assets	2,519	2,468
Deferred tax liabilities:
Lease financing	583	551
MSRs and related economic hedges	153	141
Bank premises and equipment	76	68
Goodwill and intangible assets	64	70
Investments in joint ventures and partnership interests	48	58
Other	168	143
Total deferred tax liabilities	1,092	1,031
Total net deferred tax asset	$ 1,427	$ 1,437