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INVESTMENT SECURITIES - Schedule of Investment Securities Maturity Information (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Investment securities available for sale |  |
Non-amortizing securities maturing in one year or less, amortized cost | $ 5,503 | $ 5,090
Non-amortizing securities maturing in after one through five years, amortized cost | 7,727 | 8,945
Non-amortizing securities maturing in after five through 10 years, amortized cost | 353 | 346
Non-amortizing securities maturing in after 10 years, amortized cost | 22 | 22
Amortized Cost | 34,340 | 34,512
Non-amortizing securities maturing in one year or less, fair value | 5,508 | 5,086
Non-amortizing securities maturing in after one through five years, fair value | 7,764 | 8,949
Non-amortizing securities maturing in after five through 10 years, fair value | 338 | 330
Non-amortizing securities maturing in after 10 years, fair value | 22 | 22
Investment securities available for sale, fair value | 33,900 | 33,750
Investment securities held to maturity |  |
Non-amortizing securities maturing in one year or less, amortized cost | 450 | 429
Non-amortizing securities maturing in after one through five years, amortized cost | 1,281 | 1,299
Non-amortizing securities maturing in after five through 10 years, amortized cost | 547 | 546
Amortized Cost | 10,324 | 10,239
Non-amortizing securities maturing in one year or less, fair value | 443 | 419
Non-amortizing securities maturing in after one through five years, fair value | 1,209 | 1,208
Non-amortizing securities maturing in after five through 10 years, fair value | 483 | 468
Investment securities held to maturity, cost, fair value | 8,973 | 8,702
Government agency |  |
Investment securities available for sale |  |
Without single maturity date, amortized cost | 71 | 79
Without single maturity date, fair value | 69 | 77
Residential mortgage-backed securities |  |
Investment securities available for sale |  |
Without single maturity date, amortized cost | 16,905 | 16,161
Without single maturity date, fair value | 16,605 | 15,620
Investment securities held to maturity |  |
Without single maturity date, amortized cost | 4,668 | 4,558
Without single maturity date, fair value | 4,090 | 3,878
Commercial mortgage-backed securities |  |
Investment securities available for sale |  |
Without single maturity date, amortized cost | 3,759 | 3,869
Without single maturity date, fair value | 3,594 | 3,666
Investment securities held to maturity |  |
Without single maturity date, amortized cost | 3,378 | 3,407
Without single maturity date, fair value | $ 2,748 | $ 2,729

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