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, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative instruments      
Opening balance $ 41 $ 6 $ 2
Transfers out of Level 3 (132) (198) (62)
Total gains/losses for the period:      
Included in OCI 0 0 0
Purchases/originations/acquisitions 7 0 0
Sales 0   0
Repayments 0 0 0
Settlements 0 0 0
Opening balance 4 41 6
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date (41) 34 3
Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 88 233 66
Interest and fee income      
Total gains/losses for the period:      
Included in earnings: 0 0 0
Fair Value, Recurring      
Level 3 Assets Roll Forward:      
Fair value election for servicing assets previously measured using the amortization method 351 210  
Level 1 | Fair Value, Recurring      
Level 3 Assets Roll Forward:      
Fair value election for servicing assets previously measured using the amortization method 0 0  
Level 2 | Fair Value, Recurring      
Level 3 Assets Roll Forward:      
Fair value election for servicing assets previously measured using the amortization method 0 0  
Level 3 | Fair Value, Recurring      
Level 3 Assets Roll Forward:      
Fair value election for servicing assets previously measured using the amortization method 351 210  
Home equity      
Level 3 Assets Roll Forward:      
Fair value election for servicing assets previously measured using the amortization method 351 210 7
Revision of Prior Period, Adjustment | Home equity      
Level 3 Assets Roll Forward:      
Fair value election for servicing assets previously measured using the amortization method   0 205
MSRs      
Level 3 Assets Roll Forward:      
Opening balance 210 7 10
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 0 0 0
Purchases/originations/acquisitions 194 102 0
Sales 0   0
Repayments 0 0 0
Settlements (80) 0 0
Closing balance 351 210 7
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 27 (104) (3)
MSRs | Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 27 (104) (3)
MSRs | Interest and fee income      
Total gains/losses for the period:      
Included in earnings: 0 0 0
Municipal securities      
Level 3 Assets Roll Forward:      
Opening balance 2,951 2,999 3,165
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI (46) 65 77
Purchases/originations/acquisitions 1,835 623 254
Sales (369)   0
Repayments 0 0 0
Settlements (893) (734) (496)
Closing balance 3,477 2,951 2,999
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date (47) 68 74
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) (2) (1)
Private-label CMO      
Level 3 Assets Roll Forward:      
Opening balance 9 2 0
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 0 0 0
Purchases/originations/acquisitions 11 7 2
Sales 0   0
Repayments 0 0 0
Settlements 2 0 0
Closing balance 20 9 2
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 | 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: (2) 0 0
Asset-backed securities      
Level 3 Assets Roll Forward:      
Opening balance 10 48 0
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in OCI 0 0 0
Purchases/originations/acquisitions 115 28 55
Sales 0   0
Repayments 0 0 0
Settlements (55) (66) (7)
Closing balance 70 10 48
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 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
Loans held for investment      
Level 3 Assets Roll Forward:      
Opening balance 23 26 30
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings:     0
Included in OCI 0 0 0
Purchases/originations/acquisitions 0 0 0
Sales 0   0
Repayments (4) (3) (5)
Settlements 0 0 0
Closing balance 19 23 26
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 | Mortgage banking income      
Total gains/losses for the period:      
Included in earnings: 0 0  
Loans held for investment | Interest and fee income      
Total gains/losses for the period:      
Included in earnings: $ 0 $ 0 $ 1