Income Taxes - Deferred Income Taxes Included in Other Assets in the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Other comprehensive income	$ 1,395	$ 1,595
Allowance for loan and lease losses	488	461
Loan origination fees and costs	195	95
Deferred compensation	114	105
State deferred taxes	43	20
Reserves for unfunded commitments	35	45
Reserves	33	34
Federal net operating loss carryforwards	19	31
State net operating loss carryforwards	11	14
Other	135	136
Total deferred tax assets	2,468	2,536
Deferred tax liabilities:
Lease financing	551	561
MSRs and related economic hedges	141	120
Goodwill and intangible assets	70	78
Bank premises and equipment	68	66
Investments in joint ventures and partnership interests	58	61
Other	143	101
Total deferred tax liabilities	1,031	987
Total net deferred tax asset	$ 1,437	$ 1,549