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INVESTMENT SECURITIES - Schedule of Investment Securities Maturity Information (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Investment securities available for sale |  |
Non-amortizing securities maturing in one year or less, amortized cost | $ 4,893 | $ 5,090
Non-amortizing securities maturing in after one through five years, amortized cost | 5,853 | 8,945
Non-amortizing securities maturing in after five through 10 years, amortized cost | 23 | 346
Non-amortizing securities maturing in after 10 years, amortized cost | 12 | 22
Amortized Cost | 31,952 | 34,512
Non-amortizing securities maturing in one year or less, fair value | 4,914 | 5,086
Non-amortizing securities maturing in after one through five years, fair value | 5,879 | 8,949
Non-amortizing securities maturing in after five through 10 years, fair value | 20 | 330
Non-amortizing securities maturing in after 10 years, fair value | 12 | 22
Investment securities available for sale, fair value | 31,790 | 33,750
Investment securities held to maturity |  |
Non-amortizing securities maturing in one year or less, amortized cost | 307 | 429
Non-amortizing securities maturing in after one through five years, amortized cost | 1,434 | 1,299
Non-amortizing securities maturing in after five through 10 years, amortized cost | 119 | 546
Amortized Cost | 9,647 | 10,239
Non-amortizing securities maturing in one year or less, fair value | 303 | 419
Non-amortizing securities maturing in after one through five years, fair value | 1,360 | 1,208
Non-amortizing securities maturing in after five through 10 years, fair value | 107 | 468
Investment securities held to maturity, cost, fair value | 8,491 | 8,702
Government agency |  |
Investment securities available for sale |  |
Without single maturity date, amortized cost | 44 | 79
Without single maturity date, fair value | 43 | 77
Residential mortgage-backed securities |  |
Investment securities available for sale |  |
Without single maturity date, amortized cost | 17,683 | 16,161
Without single maturity date, fair value | 17,623 | 15,620
Investment securities held to maturity |  |
Without single maturity date, amortized cost | 4,450 | 4,558
Without single maturity date, fair value | 3,992 | 3,878
Commercial mortgage-backed securities |  |
Investment securities available for sale |  |
Without single maturity date, amortized cost | 3,444 | 3,869
Without single maturity date, fair value | 3,299 | 3,666
Investment securities held to maturity |  |
Without single maturity date, amortized cost | 3,337 | 3,407
Without single maturity date, fair value | $ 2,729 | $ 2,729

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