Annual report pursuant to Section 13 and 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Roll Forward (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Roll Forward (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Total gains/losses for the period:      
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Debt and Equity Securities, Gain (Loss) Debt and Equity Securities, Gain (Loss) Debt and Equity Securities, Gain (Loss)
Derivative instruments      
Opening balance $ (2) $ (2) $ 4
Transfers into Level 3 0 0  
Transfers out of Level 3 (25) (23) (3)
Included in OCI 0 0 0
Purchases/originations 0 0 0
Sales   0  
Repayments 0   0
Settlements 18 0 0
Closing balance 2 (2) (2)
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ (1) $ (3) $ (8)
Interest and fee income      
Total gains/losses for the period:      
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest and Dividend Income, Operating Interest and Dividend Income, Operating Interest and Dividend Income, Operating
Derivative instruments      
Included in earnings: $ 0 $ 0 $ 0
Provision for credit losses      
Total gains/losses for the period:      
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest and Dividend Income, Operating   Interest and Dividend Income, Operating
Derivative instruments      
Included in earnings: $ 0   $ 0
Mortgage banking income      
Total gains/losses for the period:      
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Mortgage banking income Mortgage banking income Mortgage banking income
Derivative instruments      
Included in earnings: $ 24 $ 25 $ (3)
Noninterest income      
Total gains/losses for the period:      
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest and Dividend Income, Operating Interest and Dividend Income, Operating  
Derivative instruments      
Included in earnings: $ (13) $ (2)  
MSRs      
Level 3 Assets Roll Forward:      
Opening balance 515 494 351
Transfers into Level 3 0 0  
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 0 0 0
Purchases/originations 54 63 85
Sales   (1)  
Repayments 0   0
Settlements (56) (48) (56)
Closing balance 573 515 494
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 60 7 114
MSRs | Interest and fee income      
Total gains/losses for the period:      
Included in earnings: 0 0 0
MSRs | Provision for credit losses      
Total gains/losses for the period:      
Included in earnings: 0   0
MSRs | Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 60 7 114
MSRs | Noninterest income      
Total gains/losses for the period:      
Included in earnings: 0 0  
Municipal securities      
Level 3 Assets Roll Forward:      
Opening balance 3,335 3,248 3,477
Transfers into Level 3 0 0  
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 33 73 (262)
Purchases/originations 1,256 928 1,087
Sales   0  
Repayments 0   0
Settlements (667) (912) (1,045)
Closing balance 3,954 3,335 3,248
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 27 47 (257)
Municipal securities | Interest and fee income      
Total gains/losses for the period:      
Included in earnings: (1) (2) (5)
Municipal securities | Provision for credit losses      
Total gains/losses for the period:      
Included in earnings: (2)   (4)
Municipal securities | Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 0 0 0
Municipal securities | Noninterest income      
Total gains/losses for the period:      
Included in earnings: 0 0  
Private-label CMO      
Level 3 Assets Roll Forward:      
Opening balance 20 20 20
Transfers into Level 3 0 0  
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 0 0 0
Purchases/originations 0 1 4
Sales   0  
Repayments 0   0
Settlements 2 0 (1)
Closing balance 21 20 20
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 0 0 0
Private-label CMO | Interest and fee income      
Total gains/losses for the period:      
Included in earnings: (1) (1) (3)
Private-label CMO | Provision for credit losses      
Total gains/losses for the period:      
Included in earnings: 0   0
Private-label CMO | Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 0 0 0
Private-label CMO | Noninterest income      
Total gains/losses for the period:      
Included in earnings: 0 0  
Asset-backed securities      
Level 3 Assets Roll Forward:      
Opening balance 75 74 70
Transfers into Level 3 0 0  
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 0 1 (1)
Purchases/originations 15 0 31
Sales   0  
Repayments 0   0
Settlements (41) 0 (26)
Closing balance 49 75 74
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 0 1 (1)
Asset-backed securities | Interest and fee income      
Total gains/losses for the period:      
Included in earnings: 0 0 0
Asset-backed securities | Provision for credit losses      
Total gains/losses for the period:      
Included in earnings: 0   0
Asset-backed securities | Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 0 0 0
Asset-backed securities | Noninterest income      
Total gains/losses for the period:      
Included in earnings: 0 0  
Loans held for investment      
Level 3 Assets Roll Forward:      
Opening balance 54 16 19
Transfers into Level 3 13 41  
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 0 0 0
Purchases/originations 0 0 0
Sales   0  
Repayments (5)   (4)
Settlements 0 0 0
Closing balance 61 54 16
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 0 0 0
Loans held for investment | Interest and fee income      
Total gains/losses for the period:      
Included in earnings: (1) (3) 0
Loans held for investment | Provision for credit losses      
Total gains/losses for the period:      
Included in earnings: 0   0
Loans held for investment | Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 0 0 $ 1
Loans held for investment | Noninterest income      
Total gains/losses for the period:      
Included in earnings: $ 0 $ 0