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
Jun. 30, 2021
Dec. 31, 2020
Available-for-sale securities:    
Less than 12 months, fair value $ 10,333 $ 2,432
Less than 12 months, gross unrealized losses (125) (22)
12 months or longer, fair value 435 490
12 months or longer, gross unrealized losses (12) (12)
Total, fair value 10,768 2,922
Total, gross unrealized losses (137) (34)
Held-to-maturity securities:    
Less than 12 months, fair value 1,408  
Less than 12 months, gross unrealized losses (12)  
12 months or longer, fair value 0  
12 months or longer, gross unrealized losses 0  
Total, fair value 1,408  
Total, gross unrealized losses 12  
Residential CMO    
Available-for-sale securities:    
Less than 12 months, fair value 321 302
Less than 12 months, gross unrealized losses (8) (5)
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 321 302
Total, gross unrealized losses (8) (5)
Residential MBS    
Available-for-sale securities:    
Less than 12 months, fair value 8,170 1,633
Less than 12 months, gross unrealized losses (74) (5)
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 8,170 1,633
Total, gross unrealized losses (74) (5)
Held-to-maturity securities:    
Less than 12 months, fair value 1,408  
Less than 12 months, gross unrealized losses (12)  
12 months or longer, fair value 0  
12 months or longer, gross unrealized losses 0  
Total, fair value 1,408  
Total, gross unrealized losses 12  
Commercial MBS    
Available-for-sale securities:    
Less than 12 months, fair value 671 321
Less than 12 months, gross unrealized losses (24) (9)
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 671 321
Total, gross unrealized losses (24) (9)
Other agencies    
Available-for-sale securities:    
Less than 12 months, fair value 207  
Less than 12 months, gross unrealized losses 0  
12 months or longer, fair value 0  
12 months or longer, gross unrealized losses 0  
Total, fair value 207  
Total, gross unrealized losses 0  
Total U.S. Treasury, federal agency and other agency securities    
Available-for-sale securities:    
Less than 12 months, fair value 9,369 2,256
Less than 12 months, gross unrealized losses (106) (19)
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 9,369 2,256
Total, gross unrealized losses (106) (19)
Held-to-maturity securities:    
Less than 12 months, fair value 1,408  
Less than 12 months, gross unrealized losses (12)  
12 months or longer, fair value 0  
12 months or longer, gross unrealized losses 0  
Total, fair value 1,408  
Total, gross unrealized losses 12  
Municipal securities    
Available-for-sale securities:    
Less than 12 months, fair value 218 110
Less than 12 months, gross unrealized losses (5) (3)
12 months or longer, fair value 427 490
12 months or longer, gross unrealized losses (12) (12)
Total, fair value 645 600
Total, gross unrealized losses (17) (15)
Asset-backed securities    
Available-for-sale securities:    
Less than 12 months, fair value 75 15
Less than 12 months, gross unrealized losses (1) 0
12 months or longer, fair value 8 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 83 15
Total, gross unrealized losses (1) 0
Corporate debt    
Available-for-sale securities:    
Less than 12 months, fair value 643 51
Less than 12 months, gross unrealized losses (13) 0
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 643 51
Total, gross unrealized losses (13) 0
Private-label CMO    
Available-for-sale securities:    
Less than 12 months, fair value 28 0
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 28 0
Total, gross unrealized losses $ 0 $ 0