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, 2020
Dec. 31, 2019
Dec. 31, 2018
Total gains/losses for the period:      
Included in OCI $ 68 $ 74 $ (52)
Derivative instruments      
Opening balance 6 2 (1)
Transfers out of Level 3 (198) (62) (35)
Total gains/losses for the period:      
Included in earnings 233 66 35
Included in OCI 0 0 0
Purchases/originations 0 0 0
Sales     0
Repayments 0 0 0
Settlements 0 0 3
Opening balance 41 6 2
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 34 3 0
Residential mortgage      
Total gains/losses for the period:      
MSRs 210 7 10
Revision of Prior Period, Adjustment | Residential mortgage      
Total gains/losses for the period:      
MSRs 205 0  
MSRs      
Level 3 Assets Roll Forward:      
Opening balance 7 10 11
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings (104) (3) (1)
Included in OCI 0 0 0
Purchases/originations 102 0 0
Sales     0
Repayments 0 0 0
Settlements 0 0 0
Closing balance 210 7 10
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date (104) (3) (1)
Municipal securities      
Level 3 Assets Roll Forward:      
Opening balance 2,999 3,165 3,167
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings (2) (1) (3)
Included in OCI 65 77 (52)
Purchases/originations 623 254 658
Sales     0
Repayments 0 0 0
Settlements (734) (496) (605)
Closing balance 2,951 2,999 3,165
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      
Level 3 Assets Roll Forward:      
Opening balance 2 0  
Transfers out of Level 3 0 0  
Total gains/losses for the period:      
Included in earnings 0 0  
Included in OCI 0 0  
Purchases/originations 7 2  
Repayments 0 0  
Settlements 0 0  
Closing balance 9 2 0
Asset-backed securities      
Level 3 Assets Roll Forward:      
Opening balance 48 0 24
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings 0 0 (2)
Included in OCI 0 0 11
Purchases/originations 28 55 0
Sales     (33)
Repayments 0 0 0
Settlements (66) (7) 0
Closing balance 10 48 0
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 0 0 0
Automobile      
Level 3 Assets Roll Forward:      
Opening balance 26 30 38
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings 0 1 0
Included in OCI 0 0 0
Purchases/originations 0 0 0
Sales     0
Repayments (3) (5) (8)
Settlements 0 0 0
Closing balance 23 26 30
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date $ 0 $ 0 $ 0