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Investment Securities - Fair Value and Gross Unrealized Losses on Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 13,532 | $ 2,964
12 months or more | 26,055 | 29,029
Total | 39,587 | 31,993
Unrealized Losses |  |
Less than 12 months | (132) | (9)
12 months or more | (3,038) | (2,964)
Total | (3,170) | (2,973)
U.S. Treasury and federal agencies securities |  |
Fair Value |  |
Less than 12 months | 1,442 | 1,225
12 months or more | 0 | 0
Total | 1,442 | 1,225
Unrealized Losses |  |
Less than 12 months | (8) | 0
12 months or more | 0 | 0
Total | (8) | 0
Agency mortgage-backed securities | Residential mortgage backed securities |  |
Fair Value |  |
Less than 12 months | 8,675 | 1,454
12 months or more | 4,382 | 4,615
Total | 13,057 | 6,069
Unrealized Losses |  |
Less than 12 months | (78) | (7)
12 months or more | (561) | (526)
Total | (639) | (533)
Agency mortgage-backed securities | Commercial mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 2,934 | 149
12 months or more | 17,769 | 19,826
Total | 20,703 | 19,975
Unrealized Losses |  |
Less than 12 months | (38) | (1)
12 months or more | (2,162) | (2,123)
Total | (2,200) | (2,124)
Non-agency commercial mortgage-backed securities | Commercial mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 86 | 1
12 months or more | 2,466 | 2,695
Total | 2,552 | 2,696
Unrealized Losses |  |
Less than 12 months | (1) | 0
12 months or more | (207) | (200)
Total | (208) | (200)
Asset-backed securities and other debt securities |  |
Fair Value |  |
Less than 12 months | 395 | 135
12 months or more | 1,438 | 1,893
Total | 1,833 | 2,028
Unrealized Losses |  |
Less than 12 months | (7) | (1)
12 months or more | (108) | (115)
Total | $ (115) | $ (116)

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