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
|