Investment Securities - Amortized Costs and Estimated Fair Values (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Available-for-sale securities | |||||
| Amortized cost | $ 538,689,000,000 | $ 538,689,000,000 | $ 507,226,000,000 | ||
| Unallocated portfolio layer fair value basis adjustments, Amortized cost | (492,000,000) | (492,000,000) | 641,000,000 | ||
| Gross unrealized gains | 1,431,000,000 | 1,431,000,000 | 3,314,000,000 | ||
| Unallocated portfolio layer fair value basis adjustments, Gross unrealized gains | 0 | 0 | (641,000,000) | ||
| Gross unrealized losses | 4,072,000,000 | 4,072,000,000 | 3,342,000,000 | ||
| Unallocated portfolio layer fair value basis adjustments, Gross unrealized losses | (492,000,000) | (492,000,000) | 0 | ||
| Fair value | 536,048,000,000 | 536,048,000,000 | 507,198,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 268,474,000,000 | 268,474,000,000 | 270,134,000,000 | ||
| Gross unrealized gains | 76,000,000 | 76,000,000 | 263,000,000 | ||
| Gross unrealized losses | 18,240,000,000 | 18,240,000,000 | 17,053,000,000 | ||
| Fair value | 250,310,000,000 | 250,310,000,000 | 253,344,000,000 | ||
| Total investment securities, net of allowance for credit losses | |||||
| Amortized cost | 807,163,000,000 | 807,163,000,000 | 777,360,000,000 | ||
| Gross unrealized gains | 1,507,000,000 | 1,507,000,000 | 3,577,000,000 | ||
| Gross unrealized losses | 22,312,000,000 | 22,312,000,000 | 20,395,000,000 | ||
| Fair value | 786,358,000,000 | 786,358,000,000 | 760,542,000,000 | ||
| HTM securities purchased | 3,500,000,000 | $ 1,600,000,000 | 23,100,000,000 | $ 3,200,000,000 | |
| Investment securities, allowance for credit losses | 63,000,000 | 108,000,000 | 63,000,000 | 108,000,000 | 106,000,000 |
| Accrued interest receivables on investment securities | 5,300,000,000 | 5,300,000,000 | 4,600,000,000 | ||
| Accrued interest receivables reversed through interest income on AFS securities | 0 | 0 | 0 | 0 | |
| Accrued interest receivables reversed through interest income on HTM securities | 0 | $ 0 | 0 | $ 0 | |
| Total mortgage-backed securities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 100,318,000,000 | 100,318,000,000 | 102,547,000,000 | ||
| Gross unrealized gains | 579,000,000 | 579,000,000 | 1,162,000,000 | ||
| Gross unrealized losses | 1,851,000,000 | 1,851,000,000 | 2,262,000,000 | ||
| Fair value | 99,046,000,000 | 99,046,000,000 | 101,447,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 97,643,000,000 | 97,643,000,000 | 103,108,000,000 | ||
| Gross unrealized gains | 38,000,000 | 38,000,000 | 82,000,000 | ||
| Gross unrealized losses | 10,471,000,000 | 10,471,000,000 | 10,004,000,000 | ||
| Fair value | 87,210,000,000 | 87,210,000,000 | 93,186,000,000 | ||
| U.S. GSEs and government agencies mortgage-backed securities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 90,011,000,000 | 90,011,000,000 | 92,112,000,000 | ||
| Gross unrealized gains | 550,000,000 | 550,000,000 | 1,075,000,000 | ||
| Gross unrealized losses | 1,795,000,000 | 1,795,000,000 | 2,215,000,000 | ||
| Fair value | 88,766,000,000 | 88,766,000,000 | 90,972,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 84,920,000,000 | 84,920,000,000 | 89,073,000,000 | ||
| Gross unrealized gains | 28,000,000 | 28,000,000 | 57,000,000 | ||
| Gross unrealized losses | 9,574,000,000 | 9,574,000,000 | 9,200,000,000 | ||
| Fair value | 75,374,000,000 | 75,374,000,000 | 79,930,000,000 | ||
| Residential: U.S. Mortgage-backed securities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 5,245,000,000 | 5,245,000,000 | 5,564,000,000 | ||
| Gross unrealized gains | 7,000,000 | 7,000,000 | 38,000,000 | ||
| Gross unrealized losses | 31,000,000 | 31,000,000 | 17,000,000 | ||
| Fair value | 5,221,000,000 | 5,221,000,000 | 5,585,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 7,007,000,000 | 7,007,000,000 | 7,542,000,000 | ||
| Gross unrealized gains | 3,000,000 | 3,000,000 | 6,000,000 | ||
| Gross unrealized losses | 621,000,000 | 621,000,000 | 570,000,000 | ||
| Fair value | 6,389,000,000 | 6,389,000,000 | 6,978,000,000 | ||
| Residential: Non-U.S. mortgage-backed securities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 258,000,000 | 258,000,000 | 405,000,000 | ||
| Gross unrealized gains | 1,000,000 | 1,000,000 | 1,000,000 | ||
| Gross unrealized losses | 0 | 0 | 0 | ||
| Fair value | 259,000,000 | 259,000,000 | 406,000,000 | ||
| Commercial mortgage-backed securities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 4,804,000,000 | 4,804,000,000 | 4,466,000,000 | ||
| Gross unrealized gains | 21,000,000 | 21,000,000 | 48,000,000 | ||
| Gross unrealized losses | 25,000,000 | 25,000,000 | 30,000,000 | ||
| Fair value | 4,800,000,000 | 4,800,000,000 | 4,484,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 5,716,000,000 | 5,716,000,000 | 6,493,000,000 | ||
| Gross unrealized gains | 7,000,000 | 7,000,000 | 19,000,000 | ||
| Gross unrealized losses | 276,000,000 | 276,000,000 | 234,000,000 | ||
| Fair value | 5,447,000,000 | 5,447,000,000 | 6,278,000,000 | ||
| U.S. Treasury and government agencies | |||||
| Available-for-sale securities | |||||
| Amortized cost | 342,551,000,000 | 342,551,000,000 | 313,470,000,000 | ||
| Gross unrealized gains | 524,000,000 | 524,000,000 | 2,384,000,000 | ||
| Gross unrealized losses | 1,860,000,000 | 1,860,000,000 | 32,000,000 | ||
| Fair value | 341,215,000,000 | 341,215,000,000 | 315,822,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 142,379,000,000 | 142,379,000,000 | 132,727,000,000 | ||
| Gross unrealized gains | 0 | 0 | 134,000,000 | ||
| Gross unrealized losses | 7,310,000,000 | 7,310,000,000 | 6,414,000,000 | ||
| Fair value | 135,069,000,000 | 135,069,000,000 | 126,447,000,000 | ||
| Obligations of U.S. states and municipalities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 19,059,000,000 | 19,059,000,000 | 20,915,000,000 | ||
| Gross unrealized gains | 178,000,000 | 178,000,000 | 118,000,000 | ||
| Gross unrealized losses | 521,000,000 | 521,000,000 | 793,000,000 | ||
| Fair value | 18,716,000,000 | 18,716,000,000 | 20,240,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 8,124,000,000 | 8,124,000,000 | 8,600,000,000 | ||
| Gross unrealized gains | 22,000,000 | 22,000,000 | 17,000,000 | ||
| Gross unrealized losses | 436,000,000 | 436,000,000 | 609,000,000 | ||
| Fair value | 7,710,000,000 | 7,710,000,000 | 8,008,000,000 | ||
| Non-U.S. government debt securities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 50,724,000,000 | 50,724,000,000 | 45,676,000,000 | ||
| Gross unrealized gains | 99,000,000 | 99,000,000 | 215,000,000 | ||
| Gross unrealized losses | 316,000,000 | 316,000,000 | 236,000,000 | ||
| Fair value | 50,507,000,000 | 50,507,000,000 | 45,655,000,000 | ||
| Corporate debt securities | |||||
| Available-for-sale securities | |||||
| Amortized cost | 133,000,000 | 133,000,000 | 139,000,000 | ||
| Gross unrealized gains | 0 | 0 | 0 | ||
| Gross unrealized losses | 7,000,000 | 7,000,000 | 11,000,000 | ||
| Fair value | 126,000,000 | 126,000,000 | 128,000,000 | ||
| Asset-backed securities: Collateralized loan obligations | |||||
| Available-for-sale securities | |||||
| Amortized cost | 24,498,000,000 | 24,498,000,000 | 21,897,000,000 | ||
| Gross unrealized gains | 37,000,000 | 37,000,000 | 51,000,000 | ||
| Gross unrealized losses | 1,000,000 | 1,000,000 | 1,000,000 | ||
| Fair value | 24,534,000,000 | 24,534,000,000 | 21,947,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 19,493,000,000 | 19,493,000,000 | 24,695,000,000 | ||
| Gross unrealized gains | 16,000,000 | 16,000,000 | 29,000,000 | ||
| Gross unrealized losses | 3,000,000 | 3,000,000 | 6,000,000 | ||
| Fair value | 19,506,000,000 | 19,506,000,000 | 24,718,000,000 | ||
| Asset-backed securities: Other | |||||
| Available-for-sale securities | |||||
| Amortized cost | 1,898,000,000 | 1,898,000,000 | 1,941,000,000 | ||
| Gross unrealized gains | 14,000,000 | 14,000,000 | 25,000,000 | ||
| Gross unrealized losses | 8,000,000 | 8,000,000 | 7,000,000 | ||
| Fair value | 1,904,000,000 | 1,904,000,000 | 1,959,000,000 | ||
| Held-to-maturity securities | |||||
| Amortized cost | 835,000,000 | 835,000,000 | 1,004,000,000 | ||
| Gross unrealized gains | 0 | 0 | 1,000,000 | ||
| Gross unrealized losses | 20,000,000 | 20,000,000 | 20,000,000 | ||
| Fair value | $ 815,000,000 | $ 815,000,000 | $ 985,000,000 | ||