Investment Securities - Schedule of Marketable Securities (Details) - USD ($)
|
6 Months Ended |
|
Jun. 30, 2026 |
Dec. 31, 2025 |
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
$ 72,242,000,000
|
$ 66,973,000,000
|
| Available for sale, gross unrealized gains |
212,000,000
|
278,000,000
|
| Available for sale, gross unrealized losses |
157,000,000
|
97,000,000
|
| Available-for-sale, fair value |
72,297,000,000
|
67,154,000,000
|
| Held to maturity, amortized cost |
35,290,000,000
|
38,171,000,000
|
| Investment securities held-to-maturity |
31,104,000,000
|
34,166,000,000
|
| Allowance for credit losses on available-for-sale securities |
0
|
0
|
| Allowance for credit losses on HTM investment securities |
1,000,000
|
1,000,000
|
| Direct obligations |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
24,428,000,000
|
23,210,000,000
|
| Available for sale, gross unrealized gains |
41,000,000
|
55,000,000
|
| Available for sale, gross unrealized losses |
12,000,000
|
5,000,000
|
| Available-for-sale, fair value |
24,457,000,000
|
23,260,000,000
|
| Held to maturity, amortized cost |
275,000,000
|
573,000,000
|
| Held to maturity, gross unrealized gains |
0
|
0
|
| Held to maturity, gross unrealized losses |
2,000,000
|
3,000,000
|
| Investment securities held-to-maturity |
273,000,000
|
570,000,000
|
| Mortgage-backed securities |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
16,943,000,000
|
15,550,000,000
|
| Available for sale, gross unrealized gains |
97,000,000
|
90,000,000
|
| Available for sale, gross unrealized losses |
83,000,000
|
54,000,000
|
| Available-for-sale, fair value |
16,957,000,000
|
15,586,000,000
|
| Held to maturity, amortized cost |
31,410,000,000
|
32,876,000,000
|
| Held to maturity, gross unrealized gains |
3,000,000
|
9,000,000
|
| Held to maturity, gross unrealized losses |
4,145,000,000
|
3,965,000,000
|
| Investment securities held-to-maturity |
27,268,000,000
|
28,920,000,000
|
| Total U.S. Treasury and federal agencies |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
41,371,000,000
|
38,760,000,000
|
| Available for sale, gross unrealized gains |
138,000,000
|
145,000,000
|
| Available for sale, gross unrealized losses |
95,000,000
|
59,000,000
|
| Available-for-sale, fair value |
41,414,000,000
|
38,846,000,000
|
| Held to maturity, amortized cost |
31,685,000,000
|
33,449,000,000
|
| Held to maturity, gross unrealized gains |
3,000,000
|
9,000,000
|
| Held to maturity, gross unrealized losses |
4,147,000,000
|
3,968,000,000
|
| Investment securities held-to-maturity |
27,541,000,000
|
29,490,000,000
|
| Mortgage-backed securities |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
2,690,000,000
|
2,573,000,000
|
| Available for sale, gross unrealized gains |
3,000,000
|
6,000,000
|
| Available for sale, gross unrealized losses |
2,000,000
|
1,000,000
|
| Available-for-sale, fair value |
2,691,000,000
|
2,578,000,000
|
| Asset-backed securities |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
2,591,000,000
|
2,081,000,000
|
| Available for sale, gross unrealized gains |
4,000,000
|
5,000,000
|
| Available for sale, gross unrealized losses |
1,000,000
|
1,000,000
|
| Available-for-sale, fair value |
2,594,000,000
|
2,085,000,000
|
| Non-U.S. sovereign, supranational and non-U.S. agency |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
19,655,000,000
|
17,693,000,000
|
| Available for sale, gross unrealized gains |
40,000,000
|
73,000,000
|
| Available for sale, gross unrealized losses |
56,000,000
|
35,000,000
|
| Available-for-sale, fair value |
19,639,000,000
|
17,731,000,000
|
| Held to maturity, amortized cost |
1,579,000,000
|
2,461,000,000
|
| Held to maturity, gross unrealized gains |
1,000,000
|
4,000,000
|
| Held to maturity, gross unrealized losses |
26,000,000
|
31,000,000
|
| Investment securities held-to-maturity |
1,554,000,000
|
2,434,000,000
|
| Other |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
2,741,000,000
|
2,784,000,000
|
| Available for sale, gross unrealized gains |
24,000,000
|
42,000,000
|
| Available for sale, gross unrealized losses |
3,000,000
|
0
|
| Available-for-sale, fair value |
2,762,000,000
|
2,826,000,000
|
| Total non-U.S. debt securities |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
27,677,000,000
|
25,131,000,000
|
| Available for sale, gross unrealized gains |
71,000,000
|
126,000,000
|
| Available for sale, gross unrealized losses |
62,000,000
|
37,000,000
|
| Available-for-sale, fair value |
27,686,000,000
|
25,220,000,000
|
| Held to maturity, amortized cost |
1,579,000,000
|
2,461,000,000
|
| Held to maturity, gross unrealized gains |
1,000,000
|
4,000,000
|
| Held to maturity, gross unrealized losses |
26,000,000
|
31,000,000
|
| Investment securities held-to-maturity |
1,554,000,000
|
2,434,000,000
|
| Student loans |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
36,000,000
|
63,000,000
|
| Available for sale, gross unrealized gains |
0
|
1,000,000
|
| Available for sale, gross unrealized losses |
0
|
0
|
| Available-for-sale, fair value |
36,000,000
|
64,000,000
|
| Held to maturity, amortized cost |
2,026,000,000
|
2,261,000,000
|
| Held to maturity, gross unrealized gains |
6,000,000
|
5,000,000
|
| Held to maturity, gross unrealized losses |
23,000,000
|
24,000,000
|
| Investment securities held-to-maturity |
2,009,000,000
|
2,242,000,000
|
| Collateralized loan obligations |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
3,043,000,000
|
2,904,000,000
|
| Available for sale, gross unrealized gains |
2,000,000
|
2,000,000
|
| Available for sale, gross unrealized losses |
0
|
1,000,000
|
| Available-for-sale, fair value |
3,045,000,000
|
2,905,000,000
|
| Non-agency CMBS and RMBS |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
0
|
0
|
| Available for sale, gross unrealized gains |
0
|
3,000,000
|
| Available for sale, gross unrealized losses |
0
|
0
|
| Available-for-sale, fair value |
0
|
3,000,000
|
| Other |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
90,000,000
|
90,000,000
|
| Available for sale, gross unrealized gains |
1,000,000
|
1,000,000
|
| Available for sale, gross unrealized losses |
0
|
0
|
| Available-for-sale, fair value |
91,000,000
|
91,000,000
|
| Total asset-backed securities |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
3,169,000,000
|
3,057,000,000
|
| Available for sale, gross unrealized gains |
3,000,000
|
7,000,000
|
| Available for sale, gross unrealized losses |
0
|
1,000,000
|
| Available-for-sale, fair value |
3,172,000,000
|
3,063,000,000
|
| Held to maturity, amortized cost |
2,026,000,000
|
2,261,000,000
|
| Held to maturity, gross unrealized gains |
6,000,000
|
5,000,000
|
| Held to maturity, gross unrealized losses |
23,000,000
|
24,000,000
|
| Investment securities held-to-maturity |
2,009,000,000
|
2,242,000,000
|
| State and political subdivisions |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
25,000,000
|
25,000,000
|
| Available for sale, gross unrealized gains |
0
|
0
|
| Available for sale, gross unrealized losses |
0
|
0
|
| Available-for-sale, fair value |
25,000,000
|
25,000,000
|
| Other U.S. debt securities |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available-for-sale, fair value |
|
0
|
| Including MMLF |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Held to maturity, amortized cost |
35,290,000,000
|
38,171,000,000
|
| Held to maturity, gross unrealized gains |
10,000,000
|
18,000,000
|
| Held to maturity, gross unrealized losses |
4,196,000,000
|
4,023,000,000
|
| Investment securities held-to-maturity |
31,104,000,000
|
34,166,000,000
|
| Agency CMBS |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
2,330,000,000
|
2,810,000,000
|
| Held to maturity, amortized cost |
5,040,000,000.00
|
5,080,000,000.00
|
| Agency MBS |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
14,620,000,000
|
12,780,000,000
|
| Non-US collateralized loan obligations |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
970,000,000
|
770,000,000
|
| Non-U.S. debt securities, corporate bonds |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Available for sale, amortized cost |
$ 2,610,000,000
|
$ 2,400,000,000
|
| Federal family education loan program |
|
|
| Available-For-Sale and Held-To-Maturity-Securities [Line Items] |
|
|
| Securities guaranteed by the federal government |
97.00%
|
|