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
3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Total gains/losses for the period:        
Included in OCI   $ 74 $ (52)  
Derivative instruments        
Opening balance   2 (1) $ (2)
Transfers out of Level 3   (62) (35) (15)
Total gains/losses for the period:        
Included in earnings   66 35 16
Included in OCI   0 0 0
Purchases/originations   0 0 0
Sales   0 0 0
Repayments   0 0 0
Settlements   0 3 0
Opening balance $ 6 6 2 (1)
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date   3 0 0
MSRs        
Level 3 Assets Roll Forward:        
Opening balance   10 11 14
Transfers out of Level 3   0 0 0
Total gains/losses for the period:        
Included in earnings   (3) (1) (3)
Included in OCI   0 0 0
Purchases/originations   0 0 0
Sales   0 0 0
Repayments   0 0 0
Settlements   0 0 0
Closing balance 7 7 10 11
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date   (3) (1) (3)
Municipal securities        
Level 3 Assets Roll Forward:        
Opening balance   3,165 3,167 2,798
Transfers out of Level 3   0 0 0
Total gains/losses for the period:        
Included in earnings   (1) (3) (2)
Included in OCI   77 (52) (8)
Purchases/originations   254 658 787
Sales   0 0 0
Repayments   0 0 0
Settlements   (496) (605) (408)
Closing balance 2,999 2,999 3,165 3,167
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        
Total gains/losses for the period:        
Purchases/originations   2    
Closing balance 2 2    
Asset-backed securities        
Level 3 Assets Roll Forward:        
Opening balance   0 24 76
Transfers out of Level 3   0 0 0
Total gains/losses for the period:        
Included in earnings   0 (2) (5)
Included in OCI   0 11 14
Purchases/originations   55 0 0
Sales   0 (33) (60)
Repayments   0 0 0
Settlements   (7) 0 (1)
Closing balance 48 48 0 24
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date   0 0 (4)
Automobile        
Level 3 Assets Roll Forward:        
Opening balance   30 38 48
Transfers out of Level 3   0 0 0
Total gains/losses for the period:        
Included in earnings 1 1 0 1
Included in OCI   0 0 0
Purchases/originations   0 0 0
Sales   0 0 0
Repayments   (5) (8) (11)
Settlements   0 0 0
Closing balance $ 26 26 30 38
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date   $ 0 $ 0 $ 0