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Investment Securities - Gross Unrealized Losses and Fair Values of Investments in Continuous Unrealized Loss Positions (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
AFS securities, Fair Value |  |
Less than 12 months, Fair Value | $ 18,728 | $ 4,043
12 months or more, Fair Value | 25,766 | 27,777
Total, Fair Value | 44,494 | 31,820
AFS securities, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | (182) | (37)
12 months or more, Unrealized Losses | (4,717) | (4,613)
Total, Unrealized Losses | (4,899) | (4,650)
U.S. Treasury |  |
AFS securities, Fair Value |  |
Less than 12 months, Fair Value | 3,932 | 704
12 months or more, Fair Value | 130 | 432
Total, Fair Value | 4,062 | 1,136
AFS securities, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | (44) | (16)
12 months or more, Unrealized Losses | (6) | (8)
Total, Unrealized Losses | (50) | (24)
GSE |  |
AFS securities, Fair Value |  |
Less than 12 months, Fair Value | 105 | 65
12 months or more, Fair Value | 204 | 228
Total, Fair Value | 309 | 293
AFS securities, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | (1) | (1)
12 months or more, Unrealized Losses | (24) | (24)
Total, Unrealized Losses | (25) | (25)
Agency MBS – residential |  |
AFS securities, Fair Value |  |
Less than 12 months, Fair Value | 13,928 | 2,882
12 months or more, Fair Value | 23,431 | 24,986
Total, Fair Value | 37,359 | 27,868
AFS securities, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | (117) | (8)
12 months or more, Unrealized Losses | (4,100) | (4,009)
Total, Unrealized Losses | (4,217) | (4,017)
Debt Securities, Held-to-Maturity, Fair Value |  |
Less than 12 months, Fair Value | 201 | 0
12 months or more, Fair Value | 37,355 | 39,130
Total, Fair Value | 37,556 | 39,130
Debt Securities, Held-To-Maturity, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | 0 | 0
12 months or more, Fair Value | (8,208) | (8,056)
Total, Fair Value | (8,208) | (8,056)
Agency MBS – commercial |  |
AFS securities, Fair Value |  |
Less than 12 months, Fair Value | 561 | 227
12 months or more, Fair Value | 1,997 | 2,093
Total, Fair Value | 2,558 | 2,320
AFS securities, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | (8) | (2)
12 months or more, Unrealized Losses | (587) | (572)
Total, Unrealized Losses | (595) | (574)
States and political subdivisions |  |
AFS securities, Fair Value |  |
Less than 12 months, Fair Value | 202 | 158
12 months or more, Fair Value | 0 | 31
Total, Fair Value | 202 | 189
AFS securities, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | (12) | (10)
12 months or more, Unrealized Losses | 0 | 0
Total, Unrealized Losses | (12) | (10)
Other |  |
AFS securities, Fair Value |  |
Less than 12 months, Fair Value | 0 | 7
12 months or more, Fair Value | 4 | 7
Total, Fair Value | 4 | 14
AFS securities, Unrealized Losses |  |
Less than 12 months, Unrealized Losses | 0 | 0
12 months or more, Unrealized Losses | 0 | 0
Total, Unrealized Losses | $ 0 | $ 0

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