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Income Taxes (Summary Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Deferred Tax Assets [Abstract]    
Unrealized losses included in shareholders' equity $ 961 $ 1,138
Allowance for loan losses 430 401
Deferred tax asset, right of use liability 129 136
Accrued expenses 87 61
Other 20 47
State net operating carryforwards, net of federal tax effect 31 40
Total deferred tax assets 1,658 1,823
Deferred Tax Assets, Valuation Allowance (21) (21)
Total deferred tax assets less valuation allowance 1,637 1,802
Deferred Tax Liabilities [Abstract]    
Lease financing 439 403
Deferred Tax Liabilities, Right of use asset 121 128
Mortgage servicing rights 95 122
Goodwill and intangibles 112 103
Fixed assets 30 52
Employee benefits and deferred compensation 37 29
Other 62 22
Total deferred tax liabilities 896 859
Deferred Tax Assets, Net 741 943
Income Tax Contingency [Line Items]    
State net operating carryforwards, net of federal tax effect $ 31 $ 40