INVESTMENT SECURITIES AND OTHER SECURITIES - Schedule of Amortized Cost, Fair Value, and Gross Unrealized Gains (Losses) (Details) - USD ($)
$ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
$ 30,743
|
$ 28,565
|
| Available-for-sale securities, Gross Gains |
13
|
85
|
| Available-for-sale securities, Gross Losses |
(3,483)
|
(3,345)
|
| Available-for-sale securities |
27,273
|
25,305
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
16,368
|
15,750
|
| Held-to-maturity securities, Gross Gains |
3
|
7
|
| Held-to-maturity securities, Gross Losses |
(2,285)
|
(2,039)
|
| Held-to-maturity securities, Fair Value |
14,086
|
13,718
|
| Other securities, at cost: |
|
|
| Other securities, Amortized Cost |
822
|
724
|
| Other securities, Gross Gains |
1
|
1
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
$ 823
|
725
|
| Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] |
Accrued income and other receivables
|
|
| Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] |
Accrued income and other receivables
|
|
| Accrued interest receivable on AFS securities |
$ 89
|
61
|
| Accrued interest receivable on HTM securities |
46
|
36
|
| Cumulative basis adjustments associated with hedging relationships |
458
|
619
|
| U.S. Treasury securities |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
6,588
|
2,855
|
| Available-for-sale securities, Gross Gains |
11
|
1
|
| Available-for-sale securities, Gross Losses |
(43)
|
0
|
| Available-for-sale securities |
6,556
|
2,856
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
2,045
|
|
| Held-to-maturity securities, Gross Gains |
0
|
|
| Held-to-maturity securities, Gross Losses |
(22)
|
|
| Held-to-maturity securities, Fair Value |
2,023
|
|
| US Treasury and Government |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
25,008
|
22,299
|
| Available-for-sale securities, Gross Gains |
12
|
4
|
| Available-for-sale securities, Gross Losses |
(3,220)
|
(2,899)
|
| Available-for-sale securities |
21,800
|
19,404
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
16,367
|
15,748
|
| Held-to-maturity securities, Gross Gains |
3
|
7
|
| Held-to-maturity securities, Gross Losses |
(2,285)
|
(2,039)
|
| Held-to-maturity securities, Fair Value |
14,085
|
13,716
|
| Residential MBS |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
11,988
|
13,155
|
| Available-for-sale securities, Gross Gains |
0
|
3
|
| Available-for-sale securities, Gross Losses |
(1,971)
|
(1,776)
|
| Available-for-sale securities |
10,017
|
11,382
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
8,533
|
9,368
|
| Held-to-maturity securities, Gross Gains |
|
1
|
| Held-to-maturity securities, Gross Losses |
(1,336)
|
(1,145)
|
| Held-to-maturity securities, Fair Value |
7,197
|
8,224
|
| Residential CMO |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
3,778
|
3,592
|
| Available-for-sale securities, Gross Gains |
1
|
0
|
| Available-for-sale securities, Gross Losses |
(434)
|
(408)
|
| Available-for-sale securities |
3,345
|
3,184
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
4,309
|
4,770
|
| Held-to-maturity securities, Gross Gains |
3
|
6
|
| Held-to-maturity securities, Gross Losses |
(691)
|
(664)
|
| Held-to-maturity securities, Fair Value |
3,621
|
4,112
|
| Commercial MBS |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
2,519
|
2,536
|
| Available-for-sale securities, Gross Gains |
0
|
0
|
| Available-for-sale securities, Gross Losses |
(767)
|
(709)
|
| Available-for-sale securities |
1,752
|
1,827
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
1,407
|
1,509
|
| Held-to-maturity securities, Gross Gains |
0
|
0
|
| Held-to-maturity securities, Gross Losses |
(231)
|
(224)
|
| Held-to-maturity securities, Fair Value |
1,176
|
1,285
|
| Other agencies |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
135
|
161
|
| Available-for-sale securities, Gross Gains |
0
|
0
|
| Available-for-sale securities, Gross Losses |
(5)
|
(6)
|
| Available-for-sale securities |
130
|
155
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
73
|
101
|
| Held-to-maturity securities, Gross Gains |
0
|
0
|
| Held-to-maturity securities, Gross Losses |
(5)
|
(6)
|
| Held-to-maturity securities, Fair Value |
68
|
95
|
| Municipal securities |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
4,119
|
3,536
|
| Available-for-sale securities, Gross Gains |
1
|
2
|
| Available-for-sale securities, Gross Losses |
(132)
|
(165)
|
| Available-for-sale securities |
3,988
|
3,373
|
| Held-to-maturity securities: |
|
|
| Held to maturity securities |
1
|
2
|
| Held-to-maturity securities, Gross Gains |
0
|
0
|
| Held-to-maturity securities, Gross Losses |
0
|
0
|
| Held-to-maturity securities, Fair Value |
1
|
2
|
| Corporate debt |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
1,157
|
2,202
|
| Available-for-sale securities, Gross Gains |
0
|
79
|
| Available-for-sale securities, Gross Losses |
(102)
|
(238)
|
| Available-for-sale securities |
1,055
|
2,043
|
| Asset-backed securities |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
330
|
387
|
| Available-for-sale securities, Gross Gains |
0
|
0
|
| Available-for-sale securities, Gross Losses |
(19)
|
(31)
|
| Available-for-sale securities |
311
|
356
|
| Private-label CMO |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
119
|
131
|
| Available-for-sale securities, Gross Gains |
0
|
0
|
| Available-for-sale securities, Gross Losses |
(10)
|
(12)
|
| Available-for-sale securities |
109
|
119
|
| Other securities/sovereign debt |
|
|
| Available-for-sale securities: |
|
|
| Total available-for-sale securities |
10
|
10
|
| Available-for-sale securities, Gross Gains |
0
|
0
|
| Available-for-sale securities, Gross Losses |
0
|
0
|
| Available-for-sale securities |
10
|
10
|
| Non-marketable equity securities: | FRB stock |
|
|
| Other securities, at cost: |
|
|
| Other securities, Amortized Cost |
521
|
507
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
521
|
507
|
| Non-marketable equity securities: | FHLB stock |
|
|
| Other securities, at cost: |
|
|
| Other securities, Amortized Cost |
246
|
169
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
246
|
169
|
| Other non-marketable equity securities |
|
|
| Other securities, at cost: |
|
|
| Other securities, Amortized Cost |
25
|
17
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
25
|
17
|
| Mutual funds |
|
|
| Other securities, at cost: |
|
|
| Other securities, Amortized Cost |
29
|
30
|
| Other securities, Gross Gains |
0
|
0
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
29
|
30
|
| Equity securities |
|
|
| Other securities, at cost: |
|
|
| Other securities, Amortized Cost |
1
|
1
|
| Other securities, Gross Gains |
1
|
1
|
| Other securities, Gross Losses |
0
|
0
|
| Other securities, Fair Value |
$ 2
|
$ 2
|