v3.26.1
Fair Value of Assets and Liabilities - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities $ 1,417 $ 1,904
Loans held for sale (elected fair value) 88 151
Total securities available for sale 7,873 8,165
Government agency issued MBS    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total securities available for sale 3,390 3,641
Government agency issued CMO    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total securities available for sale 2,706 2,869
States and municipalities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total securities available for sale 326 338
Recurring    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 1,417 1,904
Loans held for sale (elected fair value) 88 151
Total securities available for sale 7,873 8,165
Total other assets 441 474
Total assets 9,819 10,694
Total trading liabilities 533 607
Total other liabilities 432 402
Total liabilities 965 1,009
Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 7 9
Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 403 368
Recurring | Derivatives, other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 22 25
Recurring | Deferred compensation mutual funds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 110 110
Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 3 37
Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 7 7
Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 321 320
Recurring | U.S. treasuries    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities   8
Total trading liabilities 469 492
Recurring | Government agency issued MBS    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 146 352
Total securities available for sale 3,390 3,641
Recurring | Government agency issued CMO    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 230 326
Total securities available for sale 2,706 2,869
Total trading liabilities 2  
Recurring | Other U.S. government agencies    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 109 157
Total securities available for sale 1,451 1,317
Recurring | States and municipalities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 74 86
Total securities available for sale 326 338
Recurring | Corporate and other debt    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 803 930
Total trading liabilities 61 115
Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 21  
Total trading liabilities 1  
Recurring | SBA interest-only strips    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 34 45
Level 1 | Recurring    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Loans held for sale (elected fair value) 0 0
Total securities available for sale 0 0
Total other assets 120 154
Total assets 120 154
Total trading liabilities 0 0
Total other liabilities 7 9
Total liabilities 7 9
Level 1 | Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 7 9
Level 1 | Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 0 0
Level 1 | Recurring | Derivatives, other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 0 0
Level 1 | Recurring | Deferred compensation mutual funds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 110 110
Level 1 | Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 3 37
Level 1 | Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 7 7
Level 1 | Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 1 | Recurring | U.S. treasuries    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities   0
Total trading liabilities 0 0
Level 1 | Recurring | Government agency issued MBS    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Level 1 | Recurring | Government agency issued CMO    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Total trading liabilities 0  
Level 1 | Recurring | Other U.S. government agencies    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Level 1 | Recurring | States and municipalities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Level 1 | Recurring | Corporate and other debt    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total trading liabilities 0 0
Level 1 | Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0  
Total trading liabilities 0  
Level 1 | Recurring | SBA interest-only strips    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Level 2 | Recurring    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 1,383 1,859
Loans held for sale (elected fair value) 74 137
Total securities available for sale 7,873 8,165
Total other assets 321 320
Total assets 9,651 10,481
Total trading liabilities 533 607
Total other liabilities 403 368
Total liabilities 936 975
Level 2 | Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 0 0
Level 2 | Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 403 368
Level 2 | Recurring | Derivatives, other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 0 0
Level 2 | Recurring | Deferred compensation mutual funds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 2 | Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 2 | Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 2 | Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 321 320
Level 2 | Recurring | U.S. treasuries    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities   8
Total trading liabilities 469 492
Level 2 | Recurring | Government agency issued MBS    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 146 352
Total securities available for sale 3,390 3,641
Level 2 | Recurring | Government agency issued CMO    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 230 326
Total securities available for sale 2,706 2,869
Total trading liabilities 2  
Level 2 | Recurring | Other U.S. government agencies    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 109 157
Total securities available for sale 1,451 1,317
Level 2 | Recurring | States and municipalities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 74 86
Total securities available for sale 326 338
Level 2 | Recurring | Corporate and other debt    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 803 930
Total trading liabilities 61 115
Level 2 | Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 21  
Total trading liabilities 1  
Level 2 | Recurring | SBA interest-only strips    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Level 3 | SBA interest-only strips    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total securities available for sale 34 45
Level 3 | Recurring    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 34 45
Loans held for sale (elected fair value) 14 14
Total securities available for sale 0 0
Total other assets 0 0
Total assets 48 59
Total trading liabilities 0 0
Total other liabilities 22 25
Total liabilities 22 25
Level 3 | Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 0 0
Level 3 | Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 0 0
Level 3 | Recurring | Derivatives, other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other liabilities 22 25
Level 3 | Recurring | Deferred compensation mutual funds    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 3 | Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 3 | Recurring | Derivatives, forwards and futures    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 3 | Recurring | Derivatives, interest rate contracts    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total other assets 0 0
Level 3 | Recurring | U.S. treasuries    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities   0
Total trading liabilities 0 0
Level 3 | Recurring | Government agency issued MBS    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Level 3 | Recurring | Government agency issued CMO    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Total trading liabilities 0  
Level 3 | Recurring | Other U.S. government agencies    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Level 3 | Recurring | States and municipalities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total securities available for sale 0 0
Level 3 | Recurring | Corporate and other debt    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0 0
Total trading liabilities 0 0
Level 3 | Recurring | Equity, mutual funds, and other    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities 0  
Total trading liabilities 0  
Level 3 | Recurring | SBA interest-only strips    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Total trading securities $ 34 $ 45