INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains and Losses (Details) - USD ($)
$ in Millions |
Jun. 30, 2022 |
Dec. 31, 2021 |
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
$ 26,977
|
$ 28,506
|
| Available-for-sale securities, Gross Gains |
102
|
269
|
| Available-for-sale securities, Gross Losses |
(2,702)
|
(315)
|
| Available-for-sale securities |
24,377
|
28,460
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
17,355
|
12,447
|
| Held-to-maturity securities, Gross Gains |
3
|
126
|
| Held-to-maturity securities, Gross Losses |
(1,442)
|
(84)
|
| Held-to-maturity securities, Fair Value |
15,916
|
12,489
|
| Other securities, Amortized Cost |
763
|
647
|
| Other securities, Gross Gains |
0
|
1
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
763
|
648
|
| Cumulative basis adjustments associated with hedging relationships |
608
|
|
| Available-for-sale Securities |
|
|
| Held-to-maturity securities: |
|
|
| Accrued interest receivable |
62
|
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 |
3,217
|
4,649
|
| Available-for-sale securities, Gross Gains |
0
|
40
|
| Available-for-sale securities, Gross Losses |
(216)
|
(40)
|
| Available-for-sale securities |
3,001
|
4,649
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
4,896
|
2,602
|
| Held-to-maturity securities, Gross Gains |
0
|
35
|
| Held-to-maturity securities, Gross Losses |
(383)
|
(20)
|
| Held-to-maturity securities, Fair Value |
4,513
|
2,617
|
| Residential MBS |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
14,478
|
15,533
|
| Available-for-sale securities, Gross Gains |
1
|
135
|
| Available-for-sale securities, Gross Losses |
(1,532)
|
(160)
|
| Available-for-sale securities |
12,947
|
15,508
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
10,509
|
7,475
|
| Held-to-maturity securities, Gross Gains |
2
|
41
|
| Held-to-maturity securities, Gross Losses |
(930)
|
(59)
|
| Held-to-maturity securities, Fair Value |
9,581
|
7,457
|
| Commercial MBS |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
2,365
|
1,896
|
| Available-for-sale securities, Gross Gains |
1
|
7
|
| Available-for-sale securities, Gross Losses |
(384)
|
(38)
|
| Available-for-sale securities |
1,982
|
1,865
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
1,792
|
2,175
|
| Held-to-maturity securities, Gross Gains |
1
|
45
|
| Held-to-maturity securities, Gross Losses |
(124)
|
(5)
|
| Held-to-maturity securities, Fair Value |
1,669
|
2,215
|
| Other agencies |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
215
|
248
|
| Available-for-sale securities, Gross Gains |
0
|
1
|
| Available-for-sale securities, Gross Losses |
(6)
|
(1)
|
| Available-for-sale securities |
209
|
248
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
156
|
193
|
| Held-to-maturity securities, Gross Gains |
0
|
5
|
| Held-to-maturity securities, Gross Losses |
(5)
|
0
|
| Held-to-maturity securities, Fair Value |
151
|
198
|
| Total U.S. Treasury, federal agency and other agency securities |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
20,280
|
22,331
|
| Available-for-sale securities, Gross Gains |
2
|
183
|
| Available-for-sale securities, Gross Losses |
(2,138)
|
(239)
|
| Available-for-sale securities |
18,144
|
22,275
|
| Held-to-maturity securities: |
|
|
| Held-to-maturity securities |
17,353
|
12,445
|
| Held-to-maturity securities, Gross Gains |
3
|
126
|
| Held-to-maturity securities, Gross Losses |
(1,442)
|
(84)
|
| Held-to-maturity securities, Fair Value |
15,914
|
12,487
|
| Municipal securities |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
3,604
|
3,497
|
| Available-for-sale securities, Gross Gains |
1
|
62
|
| Available-for-sale securities, Gross Losses |
(183)
|
(33)
|
| Available-for-sale securities |
3,422
|
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 |
158
|
106
|
| Available-for-sale securities, Gross Gains |
0
|
1
|
| Available-for-sale securities, Gross Losses |
(6)
|
(1)
|
| Available-for-sale securities |
152
|
106
|
| Asset-backed securities |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
392
|
385
|
| Available-for-sale securities, Gross Gains |
0
|
1
|
| Available-for-sale securities, Gross Losses |
(31)
|
(4)
|
| Available-for-sale securities |
361
|
382
|
| Corporate debt |
|
|
| Available-for-sale securities: |
|
|
| Available-for-sale securities, Amortized cost |
2,539
|
2,183
|
| Available-for-sale securities, Gross Gains |
99
|
22
|
| Available-for-sale securities, Gross Losses |
(344)
|
(38)
|
| Available-for-sale securities |
2,294
|
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 |
9
|
12
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
9
|
12
|
| Mutual funds |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
50
|
65
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
50
|
65
|
| Equity securities |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
3
|
6
|
| Other securities, Gross Gains |
0
|
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 |
187
|
52
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
187
|
52
|
| Federal Reserve Bank stock | Non-marketable equity securities: |
|
|
| Held-to-maturity securities: |
|
|
| Other securities, Amortized Cost |
514
|
512
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
$ 514
|
$ 512
|