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)

v3.20.1
INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost $ 14,348 $ 14,063
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 375 137
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 101 51
Debt Securities, Available-for-sale 14,622 14,149
Held-to-maturity securities 10,193 9,070
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 331 119
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (1) (3)
Debt Securities, Held-to-maturity, Fair Value 10,523 9,186
Equity Securities, FV-NI, Cost 487 441
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax 1 0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax 0 0
Equity Securities, FV-NI 488 441
US Treasury Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 8 10
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 0
Debt Securities, Available-for-sale 8 10
Collateralized Mortgage Obligations [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 5,512 5,055
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 212 48
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 1 18
Debt Securities, Available-for-sale 5,723 5,085
Held-to-maturity securities 2,316 2,351
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 108 33
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 (3)
Debt Securities, Held-to-maturity, Fair Value 2,424 2,381
Residential Mortgage Backed Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 4,167 4,180
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 137 45
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 3
Debt Securities, Available-for-sale 4,304 4,222
Held-to-maturity securities 3,704 2,463
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 121 50
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-maturity, Fair Value 3,825 2,513
Commercial Mortgage Backed Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 839 979
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 10 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 4
Debt Securities, Available-for-sale 849 976
Held-to-maturity securities 3,890 3,959
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 95 34
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (1) 0
Debt Securities, Held-to-maturity, Fair Value 3,984 3,993
Other Federal Agencies [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 145 165
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 2 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 1
Debt Securities, Available-for-sale 147 165
Held-to-maturity securities 279 293
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 7 2
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-maturity, Fair Value 286 295
US Government-sponsored Enterprises Debt Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 10,671 10,389
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 361 95
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 1 26
Debt Securities, Available-for-sale 11,031 10,458
Held-to-maturity securities 10,189 9,066
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 331 119
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (1) (3)
Debt Securities, Held-to-maturity, Fair Value 10,519 9,182
Municipal securities    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 3,050 3,044
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 14 34
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 72 23
Debt Securities, Available-for-sale 2,992 3,055
Held-to-maturity securities 4 4
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-maturity, Fair Value 4 4
Mortgage-backed Securities, Issued by Private Enterprises [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 2  
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0  
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0  
Debt Securities, Available-for-sale 2  
Asset-backed Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 574 575
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 6
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 27 2
Debt Securities, Available-for-sale 547 579
Corporate Debt Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 48 49
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 1 0
Debt Securities, Available-for-sale 47 51
Other Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 3 4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 0
Debt Securities, Available-for-sale 3 4
Mutual Fund [Member]    
Schedule of investment securities and other securities [Line Items]    
Equity Securities, FV-NI, Cost 46 53
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax 0 0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax 0 0
Equity Securities, FV-NI 46 53
Equity Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Equity Securities, FV-NI, Cost 3 1
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax 1 0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax 0 0
Equity Securities, FV-NI 4 1
Investment in Federal Home Loan Bank Stock [Member] | Nonmarketable Equity Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Equity Securities, FV-NI, Cost 140 90
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax 0 0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax 0 0
Equity Securities, FV-NI 140 90
Investment in Federal Reserve Stock [Member] | Nonmarketable Equity Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Equity Securities, FV-NI, Cost 298 297
Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax 0 0
Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, before Tax 0 0
Equity Securities, FV-NI $ 298 $ 297