Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT SECURITIES AND OTHER SECURITIES - Continuous Unrealized Loss Position (Details)

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INVESTMENT SECURITIES AND OTHER SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Available-for-sale securities:    
Less than 12 months, fair value $ 2,497 $ 3,323
Less than 12 months, gross unrealized losses (14) (21)
12 months or longer, fair value 684 2,041
12 months or longer, gross unrealized losses (13) (30)
Total, fair value 3,181 5,364
Total, gross unrealized losses (27) (51)
Held-to-maturity securities:    
Less than 12 months, fair value 0 678
Less than 12 months, gross unrealized losses 0 (1)
12 months or longer, fair value 0 112
12 months or longer, gross unrealized losses 0 (2)
Total, fair value 0 790
Total, gross unrealized losses 0 3
Residential CMO    
Available-for-sale securities:    
Less than 12 months, fair value 209 1,206
Less than 12 months, gross unrealized losses (2) (10)
12 months or longer, fair value 0 519
12 months or longer, gross unrealized losses 0 (8)
Total, fair value 209 1,725
Total, gross unrealized losses (2) (18)
Held-to-maturity securities:    
Less than 12 months, fair value 0 218
Less than 12 months, gross unrealized losses 0 (1)
12 months or longer, fair value 0 112
12 months or longer, gross unrealized losses 0 (2)
Total, fair value 0 330
Total, gross unrealized losses 0 3
Residential MBS    
Available-for-sale securities:    
Less than 12 months, fair value 1,849 1,169
Less than 12 months, gross unrealized losses (6) (3)
12 months or longer, fair value 0 9
12 months or longer, gross unrealized losses 0 0
Total, fair value 1,849 1,178
Total, gross unrealized losses (6) (3)
Held-to-maturity securities:    
Less than 12 months, fair value 0 317
Less than 12 months, gross unrealized losses 0 0
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 0 317
Total, gross unrealized losses 0 0
Commercial MBS    
Available-for-sale securities:    
Less than 12 months, fair value 27 472
Less than 12 months, gross unrealized losses (2) (2)
12 months or longer, fair value 0 272
12 months or longer, gross unrealized losses 0 (2)
Total, fair value 27 744
Total, gross unrealized losses (2) (4)
Held-to-maturity securities:    
Less than 12 months, fair value 0 81
Less than 12 months, gross unrealized losses 0 0
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 0 81
Total, gross unrealized losses 0 0
Other agencies    
Available-for-sale securities:    
Less than 12 months, fair value 0 86
Less than 12 months, gross unrealized losses 0 (1)
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 0 86
Total, gross unrealized losses 0 (1)
Held-to-maturity securities:    
Less than 12 months, fair value 0 58
Less than 12 months, gross unrealized losses 0 0
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 0 58
Total, gross unrealized losses 0 0
Total U.S. Treasury, federal agency and other agency securities    
Available-for-sale securities:    
Less than 12 months, fair value 2,085 2,933
Less than 12 months, gross unrealized losses (10) (16)
12 months or longer, fair value 0 800
12 months or longer, gross unrealized losses 0 (10)
Total, fair value 2,085 3,733
Total, gross unrealized losses (10) (26)
Held-to-maturity securities:    
Less than 12 months, fair value 0 674
Less than 12 months, gross unrealized losses 0 (1)
12 months or longer, fair value 0 112
12 months or longer, gross unrealized losses 0 (2)
Total, fair value 0 786
Total, gross unrealized losses 0 3
Municipal securities    
Available-for-sale securities:    
Less than 12 months, fair value 166 273
Less than 12 months, gross unrealized losses (3) (4)
12 months or longer, fair value 684 1,204
12 months or longer, gross unrealized losses (13) (19)
Total, fair value 850 1,477
Total, gross unrealized losses (16) (23)
Held-to-maturity securities:    
Less than 12 months, fair value 0 4
Less than 12 months, gross unrealized losses 0 0
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 0 4
Total, gross unrealized losses 0 0
Asset-backed securities    
Available-for-sale securities:    
Less than 12 months, fair value 16 116
Less than 12 months, gross unrealized losses 0 (1)
12 months or longer, fair value 0 37
12 months or longer, gross unrealized losses 0 (1)
Total, fair value 16 153
Total, gross unrealized losses 0 (2)
Corporate debt    
Available-for-sale securities:    
Less than 12 months, fair value 230 1
Less than 12 months, gross unrealized losses (1) 0
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 230 1
Total, gross unrealized losses $ (1) $ 0