Annual report pursuant to Section 13 and 15(d)

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

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INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains (Losses) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost $ 27,103 $ 28,506
Available-for-sale securities, Gross Gains 138 269
Available-for-sale securities, Gross Losses (3,818) (315)
Available-for-sale securities, Fair Value 23,423 28,460
Held-to-maturity securities, Amortized Cost 17,052 12,447
Held-to-maturity securities, Gross Gains 4 126
Held-to-maturity securities, Gross Losses (2,302) (84)
Held-to-maturity securities, Fair Value 14,754 12,489
Other securities, Amortized Cost 854 647
Other securities, Gross Gains 0 1
Other securities, Gross Losses 0 0
Other securities, Fair Value 854 648
Hedged asset, fair value hedge, last-of-layer, cumulative increase (decrease) 849  
U.S. Treasury securities    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 103 5
Available-for-sale securities, Gross Gains 0 0
Available-for-sale securities, Gross Losses 0 0
Available-for-sale securities, Fair Value 103 5
Residential CMO    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 3,336 4,649
Available-for-sale securities, Gross Gains 0 40
Available-for-sale securities, Gross Losses (422) (40)
Available-for-sale securities, Fair Value 2,914 4,649
Held-to-maturity securities, Amortized Cost 4,970 2,602
Held-to-maturity securities, Gross Gains 4 35
Held-to-maturity securities, Gross Losses (714) (20)
Held-to-maturity securities, Fair Value 4,260 2,617
Residential MBS    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 14,349 15,533
Available-for-sale securities, Gross Gains 4 135
Available-for-sale securities, Gross Losses (2,090) (160)
Available-for-sale securities, Fair Value 12,263 15,508
Held-to-maturity securities, Amortized Cost 10,295 7,475
Held-to-maturity securities, Gross Gains 0 41
Held-to-maturity securities, Gross Losses (1,375) (59)
Held-to-maturity securities, Fair Value 8,920 7,457
Commercial MBS    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 2,565 1,896
Available-for-sale securities, Gross Gains 0 7
Available-for-sale securities, Gross Losses (612) (38)
Available-for-sale securities, Fair Value 1,953 1,865
Held-to-maturity securities, Amortized Cost 1,652 2,175
Held-to-maturity securities, Gross Gains 0 45
Held-to-maturity securities, Gross Losses (204) (5)
Held-to-maturity securities, Fair Value 1,448 2,215
Other agencies    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 190 248
Available-for-sale securities, Gross Gains 1 1
Available-for-sale securities, Gross Losses (9) (1)
Available-for-sale securities, Fair Value 182 248
Held-to-maturity securities, Amortized Cost 133 193
Held-to-maturity securities, Gross Gains 0 5
Held-to-maturity securities, Gross Losses (9) 0
Held-to-maturity securities, Fair Value 124 198
Total U.S. Treasury, federal agency, and other agency securities    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 20,543 22,331
Available-for-sale securities, Gross Gains 5 183
Available-for-sale securities, Gross Losses (3,133) (239)
Available-for-sale securities, Fair Value 17,415 22,275
Held-to-maturity securities, Amortized Cost 17,050 12,445
Held-to-maturity securities, Gross Gains 4 126
Held-to-maturity securities, Gross Losses (2,302) (84)
Held-to-maturity securities, Fair Value 14,752 12,487
Municipal securities    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 3,527 3,497
Available-for-sale securities, Gross Gains 1 62
Available-for-sale securities, Gross Losses (238) (33)
Available-for-sale securities, Fair Value 3,290 3,526
Held-to-maturity securities, Amortized Cost 2 2
Held-to-maturity securities, Gross Gains 0 0
Held-to-maturity securities, Gross Losses 0 0
Held-to-maturity securities, Fair Value 2 2
Private-label CMO    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 146 106
Available-for-sale securities, Gross Gains 0 1
Available-for-sale securities, Gross Losses (18) (1)
Available-for-sale securities, Fair Value 128 106
Asset-backed securities    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 416 385
Available-for-sale securities, Gross Gains 0 1
Available-for-sale securities, Gross Losses (44) (4)
Available-for-sale securities, Fair Value 372 382
Corporate debt    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 2,467 2,183
Available-for-sale securities, Gross Gains 132 22
Available-for-sale securities, Gross Losses (385) (38)
Available-for-sale securities, Fair Value 2,214 2,167
Other securities/Sovereign debt    
Schedule of investment securities and other securities [Line Items]    
Available-for-sale securities, Amortized Cost 4 4
Available-for-sale securities, Gross Gains 0 0
Available-for-sale securities, Gross Losses 0 0
Available-for-sale securities, Fair Value 4 4
Equity securities    
Schedule of investment securities and other securities [Line Items]    
Other securities, Amortized Cost 10 12
Other securities, Gross Gains 0 0
Other securities, Gross Losses 0 0
Other securities, Fair Value 10 12
Mutual funds    
Schedule of investment securities and other securities [Line Items]    
Other securities, Amortized Cost 31 65
Other securities, Gross Gains 0 0
Other securities, Gross Losses 0 0
Other securities, Fair Value 31 65
Equity securities    
Schedule of investment securities and other securities [Line Items]    
Other securities, Amortized Cost 1 6
Other securities, Gross Gains 0 1
Other securities, Gross Losses 0 0
Other securities, Fair Value 1 7
Debt Securities, Available-For-Sale    
Schedule of investment securities and other securities [Line Items]    
Accrued interest receivable 64 62
Debt Securities, Held-To-Maturity Securitas    
Schedule of investment securities and other securities [Line Items]    
Accrued interest receivable 39 26
Federal Home Loan Bank stock | Non-marketable equity securities:    
Schedule of investment securities and other securities [Line Items]    
Other securities, Amortized Cost 312 52
Other securities, Gross Gains 0 0
Other securities, Gross Losses 0 0
Other securities, Fair Value 312 52
Federal Reserve Bank stock | Non-marketable equity securities:    
Schedule of investment securities and other securities [Line Items]    
Other securities, Amortized Cost 500 512
Other securities, Gross Gains 0 0
Other securities, Gross Losses 0 0
Other securities, Fair Value $ 500 $ 512