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)

v3.20.2
INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost $ 12,951 $ 14,063
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 382 137
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 36 51
Debt Securities, Available-for-sale 13,297 14,149
Held-to-maturity securities 9,416 9,070
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 440 119
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 (3)
Debt Securities, Held-to-maturity, Fair Value 9,856 9,186
Equity Securities, FV-NI, Cost 437 441
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 438 441
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 4,933 5,055
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 185 48
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 18
Debt Securities, Available-for-sale 5,118 5,085
Held-to-maturity securities 2,151 2,351
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 106 33
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 (3)
Debt Securities, Held-to-maturity, Fair Value 2,257 2,381
Residential Mortgage Backed Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 3,718 4,180
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 120 45
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 3
Debt Securities, Available-for-sale 3,838 4,222
Held-to-maturity securities 3,361 2,463
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 120 50
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-maturity, Fair Value 3,481 2,513
Commercial Mortgage Backed Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 764 979
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 24 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 4
Debt Securities, Available-for-sale 788 976
Held-to-maturity securities 3,631 3,959
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 202 34
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-maturity, Fair Value 3,833 3,993
Other Federal Agencies [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 144 165
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 3 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 269 293
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 12 2
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-maturity, Fair Value 281 295
US Government-sponsored Enterprises Debt Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 9,567 10,389
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 332 95
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 26
Debt Securities, Available-for-sale 9,899 10,458
Held-to-maturity securities 9,412 9,066
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 440 119
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 (3)
Debt Securities, Held-to-maturity, Fair Value 9,852 9,182
Municipal securities    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 3,145 3,044
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 47 34
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 35 23
Debt Securities, Available-for-sale 3,157 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 5  
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 5  
Asset-backed Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 208 575
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 3 6
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 2
Debt Securities, Available-for-sale 211 579
Corporate Debt Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 22 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 21 51
Other Securities [Member]    
Schedule of investment securities and other securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 4 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 4 4
Mutual Fund [Member]    
Schedule of investment securities and other securities [Line Items]    
Equity Securities, FV-NI, Cost 52 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 52 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 84 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 84 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