Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details)

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INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Available-for-sale securities:    
Total available-for-sale securities $ 14,460 $ 14,063
Gross Gains 374 137
Gross Losses (27) (51)
Fair Value 14,807 14,149
Held-to-maturity securities:    
Total held-to-maturity securities 8,557 9,070
Gross Gains 413 119
Gross Losses 0 (3)
Fair Value 8,970 9,186
Other securities, cost 421 441
Other securities, fair value 421 441
U.S. Treasury    
Available-for-sale securities:    
Total available-for-sale securities 5 10
Gross Gains 0 0
Gross Losses 0 0
Fair Value 5 10
Residential CMO    
Available-for-sale securities:    
Total available-for-sale securities 4,343 5,055
Gross Gains 157 48
Gross Losses (2) (18)
Fair Value 4,498 5,085
Held-to-maturity securities:    
Total held-to-maturity securities 1,959 2,351
Gross Gains 98 33
Gross Losses 0 (3)
Fair Value 2,057 2,381
Residential MBS    
Available-for-sale securities:    
Total available-for-sale securities 5,669 4,180
Gross Gains 98 45
Gross Losses (6) (3)
Fair Value 5,761 4,222
Held-to-maturity securities:    
Total held-to-maturity securities 2,926 2,463
Gross Gains 102 50
Gross Losses 0 0
Fair Value 3,028 2,513
Commercial MBS    
Available-for-sale securities:    
Total available-for-sale securities 787 979
Gross Gains 22 1
Gross Losses (2) (4)
Fair Value 807 976
Held-to-maturity securities:    
Total held-to-maturity securities 3,413 3,959
Gross Gains 199 34
Gross Losses 0 0
Fair Value 3,612 3,993
Other agencies    
Available-for-sale securities:    
Total available-for-sale securities 112 165
Gross Gains 2 1
Gross Losses 0 (1)
Fair Value 114 165
Held-to-maturity securities:    
Total held-to-maturity securities 256 293
Gross Gains 14 2
Gross Losses 0 0
Fair Value 270 295
Total U.S. Treasury, federal agency and other agency securities    
Available-for-sale securities:    
Total available-for-sale securities 10,916 10,389
Gross Gains 279 95
Gross Losses (10) (26)
Fair Value 11,185 10,458
Held-to-maturity securities:    
Total held-to-maturity securities 8,554 9,066
Gross Gains 413 119
Gross Losses 0 (3)
Fair Value 8,967 9,182
Municipal securities    
Available-for-sale securities:    
Total available-for-sale securities 3,071 3,044
Gross Gains 89 34
Gross Losses (16) (23)
Fair Value 3,144 3,055
Held-to-maturity securities:    
Total held-to-maturity securities 3 4
Gross Gains 0 0
Gross Losses 0 0
Fair Value 3 4
Private-label CMO    
Available-for-sale securities:    
Total available-for-sale securities 5 2
Gross Gains 0 0
Gross Losses 0 0
Fair Value 5 2
Asset-backed securities    
Available-for-sale securities:    
Total available-for-sale securities 197 575
Gross Gains 6 6
Gross Losses 0 (2)
Fair Value 203 579
Corporate debt    
Available-for-sale securities:    
Total available-for-sale securities 267 49
Gross Gains 0 2
Gross Losses (1) 0
Fair Value 266 51
Other securities/Sovereign debt    
Available-for-sale securities:    
Total available-for-sale securities 4 4
Gross Gains 0 0
Gross Losses 0 0
Fair Value 4 4
Mutual funds    
Held-to-maturity securities:    
Other securities, cost 49 53
Other securities, fair value 49 53
Equity securities    
Held-to-maturity securities:    
Other securities, cost 9 1
Other securities, fair value 9 1
Federal Home Loan Bank stock | Non-marketable equity securities:    
Held-to-maturity securities:    
Other securities, cost 64 90
Other securities, fair value 64 90
Federal Reserve Bank stock | Non-marketable equity securities:    
Held-to-maturity securities:    
Other securities, cost 299 297
Other securities, fair value $ 299 $ 297