v3.26.3
FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt securities available for sale $ 3,747 $ 3,727
Debt securities held to maturity 4,021 3,941
Net loans and leases, including loans held for sale 101 85
Derivative assets 159 122
Long-term borrowings 642  
Derivative liabilities 309 208
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,526 2,498
Debt securities available for sale 397 356
Debt securities held to maturity 1 0
Net loans and leases, including loans held for sale 0 0
Loan servicing rights 0 0
Derivative assets 0 0
Accrued interest receivable 172 163
Deposits 32,395 31,451
Short-term borrowings 2,996 2,018
Long-term borrowings 0 0
Derivative liabilities 0 0
Accrued interest payable 55 50
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities available for sale 3,350 3,371
Debt securities held to maturity 4,020 3,941
Net loans and leases, including loans held for sale 228 514
Loan servicing rights 0 0
Derivative assets 159 115
Accrued interest receivable 0 0
Deposits 7,097 7,285
Short-term borrowings 0 0
Long-term borrowings 992 1,103
Derivative liabilities 303 208
Accrued interest payable 0 0
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Debt securities available for sale 0 0
Debt securities held to maturity 0 0
Net loans and leases, including loans held for sale 35,399 33,806
Loan servicing rights 118 90
Derivative assets 0 7
Accrued interest receivable 0 0
Deposits 0 0
Short-term borrowings 0 0
Long-term borrowings 788 817
Derivative liabilities 6 0
Accrued interest payable 0 0
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,526 2,498
Debt securities available for sale 3,747 3,727
Debt securities held to maturity 4,404 4,117
Net loans and leases, including loans held for sale 36,318 34,853
Loan servicing rights 79 75
Derivative assets 159 122
Accrued interest receivable 172 163
Deposits 39,550 38,759
Short-term borrowings 3,001 2,017
Long-term borrowings 1,803 1,901
Derivative liabilities 309 208
Accrued interest payable 55 50
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,526 2,498
Debt securities available for sale 3,747 3,727
Debt securities held to maturity 4,021 3,941
Net loans and leases, including loans held for sale 35,627 34,320
Loan servicing rights 118 90
Derivative assets 159 122
Accrued interest receivable 172 163
Deposits 39,492 38,736
Short-term borrowings 2,996 2,018
Long-term borrowings 1,780 1,920
Derivative liabilities 309 208
Accrued interest payable $ 55 $ 50