Quarterly report pursuant to Section 13 or 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
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Assets Level 3 Roll Forward:                
Transfers into Level 3     $ 0          
Transfers out of Level 3     (11)          
Total gains/losses for the period:                
Repayments     0 $ 0        
Derivative instruments                
Opening balance $ 1 $ (2) 1 (2) $ 4 $ (2) $ 3 $ (2)
Transfers into Level 3 0 0   0        
Transfers out of Level 3 (6) (8)   (10)        
Included in earnings:   3            
Included in OCI 0 0 0 0        
Purchases/originations 0 0 0 0        
Repayments 0 0            
Settlements 5 0 11 0        
Closing balance 1 (2) 1 (2)        
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date (1) (1) 0 4        
Mortgage banking income                
Derivative instruments                
Included in earnings: 4   11 10        
Interest and fee income                
Derivative instruments                
Included in earnings: 0   0 0        
Noninterest income                
Derivative instruments                
Included in earnings: (6)   (8)          
Provision for credit losses                
Derivative instruments                
Included in earnings: 0   0          
MSRs                
Assets Level 3 Roll Forward:                
Opening balance 534 485 515 494        
Transfers into Level 3 0 0 0 0        
Transfers out of Level 3 0 0 0 0        
Total gains/losses for the period:                
Included in earnings:   15            
Included in OCI 0 0 0 0        
Purchases/originations 11 18 21 31        
Repayments 0 0 0 0        
Settlements (14) (13) (25) (23)        
Closing balance 543 505 543 505 534 515 485 494
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 12 15 32 3        
MSRs | Mortgage banking income                
Total gains/losses for the period:                
Included in earnings: 12   32 3        
MSRs | Interest and fee income                
Total gains/losses for the period:                
Included in earnings: 0   0 0        
MSRs | Noninterest income                
Total gains/losses for the period:                
Included in earnings: 0              
MSRs | Provision for credit losses                
Total gains/losses for the period:                
Included in earnings: 0   0          
Municipal securities                
Assets Level 3 Roll Forward:                
Opening balance 3,293 3,339 3,335 3,248        
Transfers into Level 3 0 0 0 0        
Transfers out of Level 3 0 0 0 0        
Total gains/losses for the period:                
Included in earnings:   0            
Included in OCI (33) (7) (14) (4)        
Purchases/originations 228 378 300 555        
Repayments 0 0 0 0        
Settlements (144) (214) (277) (303)        
Closing balance 3,341 3,496 3,341 3,496 3,293 3,335 3,339 3,248
Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period (34) (13) (16) (10)        
Municipal securities | Mortgage banking income                
Total gains/losses for the period:                
Included in earnings: 0   0 0        
Municipal securities | Interest and fee income                
Total gains/losses for the period:                
Included in earnings: (1)   (1) 0        
Municipal securities | Noninterest income                
Total gains/losses for the period:                
Included in earnings: 0              
Municipal securities | Provision for credit losses                
Total gains/losses for the period:                
Included in earnings: (2)   (2)          
Private-label CMO                
Assets Level 3 Roll Forward:                
Opening balance 20 20 20 20        
Transfers into Level 3 0 0 0 0        
Transfers out of Level 3 0 0 0 0        
Total gains/losses for the period:                
Included in earnings:   0            
Included in OCI 0 0 0 0        
Purchases/originations 0 0 0 1        
Repayments 0 0 0 0        
Settlements 1 0 1 0        
Closing balance 20 20 20 20 20 20 20 20
Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period 0 0 0 0        
Private-label CMO | Mortgage banking income                
Total gains/losses for the period:                
Included in earnings: 0   0 0        
Private-label CMO | Interest and fee income                
Total gains/losses for the period:                
Included in earnings: 0   (1) (1)        
Private-label CMO | Noninterest income                
Total gains/losses for the period:                
Included in earnings: (1)              
Private-label CMO | Provision for credit losses                
Total gains/losses for the period:                
Included in earnings: 0   0          
Asset-backed securities                
Assets Level 3 Roll Forward:                
Opening balance 72 74 75 74        
Transfers into Level 3 0 0 0 0        
Transfers out of Level 3 0 0 0 0        
Total gains/losses for the period:                
Included in earnings:   0            
Included in OCI 0 1 0 1        
Purchases/originations 0 0 0 0        
Repayments 0 0 0 0        
Settlements (37) 0 (40) 0        
Closing balance 35 75 35 75 72 75 74 74
Change in unrealized gains or losses for the period included in other comprehensive income for assets held at the end of the reporting period 0 0 0 0        
Asset-backed securities | Mortgage banking income                
Total gains/losses for the period:                
Included in earnings: 0   0 0        
Asset-backed securities | Interest and fee 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              
Asset-backed securities | Provision for credit losses                
Total gains/losses for the period:                
Included in earnings: 0   0          
Loans held for investment                
Assets Level 3 Roll Forward:                
Opening balance 58 15 54 16        
Transfers into Level 3 4 19 8 19        
Transfers out of Level 3 0 0 0 0        
Total gains/losses for the period:                
Included in earnings:   0            
Included in OCI 0 0 0 0        
Purchases/originations 0 0 0 0        
Repayments (1) (1) (1) (2)        
Settlements 0 0 0 0        
Closing balance 60 33 60 33 $ 58 $ 54 $ 15 $ 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 0        
Loans held for investment | Mortgage banking income                
Total gains/losses for the period:                
Included in earnings: 0   0 0        
Loans held for investment | Interest and fee income                
Total gains/losses for the period:                
Included in earnings: (1)   (1) $ 0        
Loans held for investment | Noninterest income                
Total gains/losses for the period:                
Included in earnings: 0              
Loans held for investment | Provision for credit losses                
Total gains/losses for the period:                
Included in earnings: $ 0   $ 0