INVESTMENT SECURITIES AND OTHER SECURITIES - Continuous Unrealized Loss Position (Details) - USD ($)
$ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
$ 1,375
|
$ 8,944
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
(28)
|
(1,062)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
20,381
|
13,763
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(3,317)
|
(2,756)
|
| Available-for-sale securities, Fair Value |
21,756
|
22,707
|
| Available-for-sale securities, Gross Unrealized Losses |
(3,345)
|
(3,818)
|
| Held-to-maturity securities, Less than 12 Months, Fair Value |
156
|
7,178
|
| Held-to-maturity securities, Less than 12 Months, Gross Unrealized Losses |
(1)
|
(863)
|
| Held-to-maturity securities, Over 12 Months, Fair Value |
13,030
|
7,241
|
| Held-to-maturity securities, Over 12 Months, Gross Unrealized Losses |
(2,038)
|
(1,439)
|
| Held-to-maturity securities, Fair Value |
13,186
|
14,419
|
| Held-to-maturity securities, Gross Unrealized Losses |
(2,039)
|
(2,302)
|
| Residential CMO |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
543
|
2,096
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
(7)
|
(224)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
2,641
|
818
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(401)
|
(198)
|
| Available-for-sale securities, Fair Value |
3,184
|
2,914
|
| Available-for-sale securities, Gross Unrealized Losses |
(408)
|
(422)
|
| Held-to-maturity securities, Less than 12 Months, Fair Value |
156
|
1,702
|
| Held-to-maturity securities, Less than 12 Months, Gross Unrealized Losses |
(1)
|
(238)
|
| Held-to-maturity securities, Over 12 Months, Fair Value |
3,542
|
2,283
|
| Held-to-maturity securities, Over 12 Months, Gross Unrealized Losses |
(663)
|
(476)
|
| Held-to-maturity securities, Fair Value |
3,698
|
3,985
|
| Held-to-maturity securities, Gross Unrealized Losses |
(664)
|
(714)
|
| Residential MBS |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
207
|
2,455
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
(2)
|
(286)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
10,913
|
9,490
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(1,774)
|
(1,804)
|
| Available-for-sale securities, Fair Value |
11,120
|
11,945
|
| Available-for-sale securities, Gross Unrealized Losses |
(1,776)
|
(2,090)
|
| Held-to-maturity securities, Less than 12 Months, Fair Value |
0
|
4,151
|
| Held-to-maturity securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(462)
|
| Held-to-maturity securities, Over 12 Months, Fair Value |
8,108
|
4,711
|
| Held-to-maturity securities, Over 12 Months, Gross Unrealized Losses |
(1,145)
|
(913)
|
| Held-to-maturity securities, Fair Value |
8,108
|
8,862
|
| Held-to-maturity securities, Gross Unrealized Losses |
(1,145)
|
(1,375)
|
| Commercial MBS |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
0
|
1,090
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(249)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
1,827
|
863
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(709)
|
(363)
|
| Available-for-sale securities, Fair Value |
1,827
|
1,953
|
| Available-for-sale securities, Gross Unrealized Losses |
(709)
|
(612)
|
| Held-to-maturity securities, Less than 12 Months, Fair Value |
0
|
1,201
|
| Held-to-maturity securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(154)
|
| Held-to-maturity securities, Over 12 Months, Fair Value |
1,285
|
247
|
| Held-to-maturity securities, Over 12 Months, Gross Unrealized Losses |
(224)
|
(50)
|
| Held-to-maturity securities, Fair Value |
1,285
|
1,448
|
| Held-to-maturity securities, Gross Unrealized Losses |
(224)
|
(204)
|
| Other agencies |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
0
|
40
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(1)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
81
|
56
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(6)
|
(8)
|
| Available-for-sale securities, Fair Value |
81
|
96
|
| Available-for-sale securities, Gross Unrealized Losses |
(6)
|
(9)
|
| Held-to-maturity securities, Less than 12 Months, Fair Value |
0
|
124
|
| Held-to-maturity securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(9)
|
| Held-to-maturity securities, Over 12 Months, Fair Value |
95
|
0
|
| Held-to-maturity securities, Over 12 Months, Gross Unrealized Losses |
(6)
|
0
|
| Held-to-maturity securities, Fair Value |
95
|
124
|
| Held-to-maturity securities, Gross Unrealized Losses |
(6)
|
(9)
|
| Total U.S. Treasury, federal agency, and other agency securities |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
750
|
5,681
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
(9)
|
(760)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
15,462
|
11,227
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(2,890)
|
(2,373)
|
| Available-for-sale securities, Fair Value |
16,212
|
16,908
|
| Available-for-sale securities, Gross Unrealized Losses |
(2,899)
|
(3,133)
|
| Held-to-maturity securities, Less than 12 Months, Fair Value |
156
|
7,178
|
| Held-to-maturity securities, Less than 12 Months, Gross Unrealized Losses |
(1)
|
(863)
|
| Held-to-maturity securities, Over 12 Months, Fair Value |
13,030
|
7,241
|
| Held-to-maturity securities, Over 12 Months, Gross Unrealized Losses |
(2,038)
|
(1,439)
|
| Held-to-maturity securities, Fair Value |
13,186
|
14,419
|
| Held-to-maturity securities, Gross Unrealized Losses |
(2,039)
|
(2,302)
|
| Municipal securities |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
625
|
2,298
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
(19)
|
(174)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
2,496
|
807
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(146)
|
(64)
|
| Available-for-sale securities, Fair Value |
3,121
|
3,105
|
| Available-for-sale securities, Gross Unrealized Losses |
(165)
|
(238)
|
| Private-label CMO |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
0
|
64
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(13)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
99
|
43
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(12)
|
(5)
|
| Available-for-sale securities, Fair Value |
99
|
107
|
| Available-for-sale securities, Gross Unrealized Losses |
(12)
|
(18)
|
| Asset-backed Securities |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
0
|
174
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(10)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
281
|
199
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(31)
|
(34)
|
| Available-for-sale securities, Fair Value |
281
|
373
|
| Available-for-sale securities, Gross Unrealized Losses |
(31)
|
(44)
|
| Corporate debt |
|
|
| Investment securities and other securities disclosure [Line Items] |
|
|
| Available-for-sale securities, Less than 12 Months, Fair Value |
0
|
727
|
| Debt Securities, Available-for-sale securities, Less than 12 Months, Gross Unrealized Losses |
0
|
(105)
|
| Available-for-sale securities, Over 12 Months, Fair Value |
2,043
|
1,487
|
| Available-for-sale securities, Over 12 Months, Gross Unrealized Losses |
(238)
|
(280)
|
| Available-for-sale securities, Fair Value |
2,043
|
2,214
|
| Available-for-sale securities, Gross Unrealized Losses |
$ (238)
|
$ (385)
|