Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Roll Forward (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Derivative instruments      
Opening balance $ (2) $ 6 $ 3
Transfers into Level 3 0 0 0
Transfers out of Level 3 (15) (7) (2)
Total gains/losses for the period:      
Included in earnings 16 (1) 5
Included in OCI 0 0 0
Purchases/originations 0 0 0
Sales 0 0 0
Repayments 0 0 0
Settlements 0 0 0
Opening balance (1) (2) 6
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 0 (1) 5
MSRs      
Level 3 Assets Roll Forward:      
Opening balance 14 18 23
Transfers into Level 3 0 0 0
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings (3) (4) (5)
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 11 14 18
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date (3) (4) (5)
Municipal securities      
Level 3 Assets Roll Forward:      
Opening balance 2,798 2,095 1,418
Transfers into Level 3 0 0 0
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings (2) 7 0
Included in OCI (8) (28) (4)
Purchases/originations 787 1,399 1,002
Sales 0 (37) (10)
Repayments 0 0 0
Settlements (408) (638) (311)
Closing balance 3,167 2,798 2,095
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date 0 (33) 0
Private-label CMO      
Level 3 Assets Roll Forward:      
Opening balance   0 30
Transfers into Level 3     0
Transfers out of Level 3     0
Total gains/losses for the period:      
Included in earnings     0
Included in OCI     2
Purchases/originations     0
Sales     (30)
Repayments     0
Settlements     (2)
Closing balance     0
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date     0
Asset-backed securities      
Level 3 Assets Roll Forward:      
Opening balance 76 100 83
Transfers into Level 3 0 0 0
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings (5) (2) (3)
Included in OCI 14 6 25
Purchases/originations 0 0 0
Sales (60) (25) 0
Repayments 0 0 0
Settlements (1) (3) (5)
Closing balance 24 76 100
Change in unrealized gains or losses for the period included in earnings for assets held at end of the reporting date (4) 4 (3)
Automobile      
Level 3 Assets Roll Forward:      
Opening balance 48 2 10
Transfers into Level 3 0 0 0
Transfers out of Level 3 0 0 0
Total gains/losses for the period:      
Included in earnings 1 (2) 0
Included in OCI 0 0 0
Purchases/originations 0 56 0
Sales 0 0 0
Repayments (11) (8) (8)
Settlements 0 0 0
Closing balance 38 48 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