v3.26.3
Fair Value Measurement (Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale $ 10,935 $ 11,112
Loans held for sale 45 262
Loans Receivable, Fair Value Disclosure 67 78
Servicing Asset at Fair Value, Amount 118 99
Derivative Asset 148 84
Total assets measured at fair value 11,398 11,717
Junior subordinated debentures, at fair value 353 338
Derivative Liability 285 179
Total liabilities measured at fair value 638 517
Foreign currency derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 0 0
Derivative Liability 1 0
Investments in mutual funds and other securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 64 63
Equity securities held in rabbi trusts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 21 19
U.S. Treasury and agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 1,136 1,300
Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 1,443 1,629
Mortgage-backed securities and collateralized mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 8,356 8,183
Interest rate futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability 5  
Interest rate forward sales commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 2  
Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 146 84
Derivative Liability 279 179
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for sale 0 0
Loans Receivable, Fair Value Disclosure 0 0
Servicing Asset at Fair Value, Amount 0 0
Total assets measured at fair value 311 291
Junior subordinated debentures, at fair value 0 0
Total liabilities measured at fair value 5 0
Level 1 | Foreign currency derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability 0  
Level 1 | Investments in mutual funds and other securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 64 63
Level 1 | Equity securities held in rabbi trusts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 21 19
Level 1 | U.S. Treasury and agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 226 209
Level 1 | Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 0 0
Level 1 | Mortgage-backed securities and collateralized mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 0 0
Level 1 | Interest rate futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability 5  
Level 1 | Interest rate forward sales commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 0  
Level 1 | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 0 0
Derivative Liability 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for sale 45 262
Loans Receivable, Fair Value Disclosure 67 78
Servicing Asset at Fair Value, Amount 0 0
Total assets measured at fair value 10,969 11,327
Junior subordinated debentures, at fair value 0 0
Total liabilities measured at fair value 280 179
Level 2 | Foreign currency derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability 1  
Level 2 | Investments in mutual funds and other securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 0 0
Level 2 | Equity securities held in rabbi trusts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 0 0
Level 2 | U.S. Treasury and agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 910 1,091
Level 2 | Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 1,443 1,629
Level 2 | Mortgage-backed securities and collateralized mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 8,356 8,183
Level 2 | Interest rate futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability 0  
Level 2 | Interest rate forward sales commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 2  
Level 2 | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 146 84
Derivative Liability 279 179
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans held for sale 0 0
Loans Receivable, Fair Value Disclosure 0 0
Servicing Asset at Fair Value, Amount 118 99
Total assets measured at fair value 118 99
Junior subordinated debentures, at fair value 353 338
Total liabilities measured at fair value 353 338
Level 3 | Foreign currency derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability 0  
Level 3 | Investments in mutual funds and other securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 0 0
Level 3 | Equity securities held in rabbi trusts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity and Other Investment Securities, Excluding Investments Measured At Net Asset Value Per Share 0 0
Level 3 | U.S. Treasury and agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 0 0
Level 3 | Obligations of states and political subdivisions    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 0 0
Level 3 | Mortgage-backed securities and collateralized mortgage obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment securities available for sale 0 0
Level 3 | Interest rate futures    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability 0  
Level 3 | Interest rate forward sales commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 0  
Level 3 | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset 0 0
Derivative Liability $ 0 $ 0