INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details) - USD ($)
$ in Millions |
Sep. 30, 2022 |
Dec. 31, 2021 |
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
$ 27,130
|
$ 28,506
|
| Available-for-sale securities, Gross Gains |
143
|
269
|
| Available-for-sale securities, Gross Losses |
(3,967)
|
(315)
|
| Available-for-sale securities |
23,306
|
28,460
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
17,173
|
12,447
|
| Held-to-maturity securities, Gross Gains |
0
|
126
|
| Held-to-maturity securities, Gross Losses |
(2,338)
|
(84)
|
| Held-to-maturity securities, Fair Value |
14,835
|
12,489
|
| Other securities, Amortized Cost |
817
|
647
|
| Other securities, Gross Gains |
1
|
1
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
818
|
648
|
| Cumulative basis adjustments associated with hedging relationships |
892
|
|
| Available-for-sale Securities |
|
|
| Held-to-maturity securities: |
|
|
| Accrued interest receivable |
71
|
62
|
| Held-to-maturity Securities |
|
|
| Held-to-maturity securities: |
|
|
| Accrued interest receivable |
38
|
26
|
| U.S. Treasury |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
5
|
5
|
| Available-for-sale securities, Gross Gains |
0
|
0
|
| Available-for-sale securities, Gross Losses |
0
|
0
|
| Available-for-sale securities |
5
|
5
|
| Residential CMO |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
3,417
|
4,649
|
| Available-for-sale securities, Gross Gains |
0
|
40
|
| Available-for-sale securities, Gross Losses |
(382)
|
(40)
|
| Available-for-sale securities |
3,035
|
4,649
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
4,757
|
2,602
|
| Held-to-maturity securities, Gross Gains |
0
|
35
|
| Held-to-maturity securities, Gross Losses |
(667)
|
(20)
|
| Held-to-maturity securities, Fair Value |
4,090
|
2,617
|
| Residential MBS |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
14,269
|
15,533
|
| Available-for-sale securities, Gross Gains |
0
|
135
|
| Available-for-sale securities, Gross Losses |
(2,286)
|
(160)
|
| Available-for-sale securities |
11,983
|
15,508
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
10,517
|
7,475
|
| Held-to-maturity securities, Gross Gains |
0
|
41
|
| Held-to-maturity securities, Gross Losses |
(1,474)
|
(59)
|
| Held-to-maturity securities, Fair Value |
9,043
|
7,457
|
| Commercial MBS |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
2,581
|
1,896
|
| Available-for-sale securities, Gross Gains |
0
|
7
|
| Available-for-sale securities, Gross Losses |
(543)
|
(38)
|
| Available-for-sale securities |
2,038
|
1,865
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
1,756
|
2,175
|
| Held-to-maturity securities, Gross Gains |
0
|
45
|
| Held-to-maturity securities, Gross Losses |
(188)
|
(5)
|
| Held-to-maturity securities, Fair Value |
1,568
|
2,215
|
| Other agencies |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
199
|
248
|
| Available-for-sale securities, Gross Gains |
0
|
1
|
| Available-for-sale securities, Gross Losses |
(9)
|
(1)
|
| Available-for-sale securities |
190
|
248
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
141
|
193
|
| Held-to-maturity securities, Gross Gains |
0
|
5
|
| Held-to-maturity securities, Gross Losses |
(9)
|
0
|
| Held-to-maturity securities, Fair Value |
132
|
198
|
| Total U.S. Treasury, federal agency, and other agency securities |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
20,471
|
22,331
|
| Available-for-sale securities, Gross Gains |
0
|
183
|
| Available-for-sale securities, Gross Losses |
(3,220)
|
(239)
|
| Available-for-sale securities |
17,251
|
22,275
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
17,171
|
12,445
|
| Held-to-maturity securities, Gross Gains |
0
|
126
|
| Held-to-maturity securities, Gross Losses |
(2,338)
|
(84)
|
| Held-to-maturity securities, Fair Value |
14,833
|
12,487
|
| Municipal securities |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
3,626
|
3,497
|
| Available-for-sale securities, Gross Gains |
1
|
62
|
| Available-for-sale securities, Gross Losses |
(251)
|
(33)
|
| Available-for-sale securities |
3,376
|
3,526
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
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 |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
151
|
106
|
| Available-for-sale securities, Gross Gains |
1
|
1
|
| Available-for-sale securities, Gross Losses |
(10)
|
(1)
|
| Available-for-sale securities |
142
|
106
|
| Asset-backed securities |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
414
|
385
|
| Available-for-sale securities, Gross Gains |
1
|
1
|
| Available-for-sale securities, Gross Losses |
(44)
|
(4)
|
| Available-for-sale securities |
371
|
382
|
| Corporate debt |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
2,464
|
2,183
|
| Available-for-sale securities, Gross Gains |
140
|
22
|
| Available-for-sale securities, Gross Losses |
(442)
|
(38)
|
| Available-for-sale securities |
2,162
|
2,167
|
| Other securities/Sovereign debt |
|
|
| Available-for-sale securities: |
|
|
| 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 |
4
|
4
|
| Equity securities |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
8
|
12
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
8
|
12
|
| Mutual funds |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
47
|
65
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
47
|
65
|
| Equity securities |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
2
|
6
|
| Other securities, Gross Gains |
1
|
1
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
3
|
7
|
| Federal Home Loan Bank stock | Non-marketable equity securities: |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
245
|
52
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
245
|
52
|
| Federal Reserve Bank stock | Non-marketable equity securities: |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
515
|
512
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
$ 515
|
$ 512
|