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Investment Securities - Schedule of Investment Securities Maturity Information (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Investment securities available for sale |  |
Non-amortizing securities maturing in one year or less, cost | $ 48 | $ 0
Non-amortizing securities maturing in after one through five years, cost | 2,063 | 2,049
Non-amortizing securities maturing in after five through 10 years, cost | 503 | 523
Non-amortizing securities maturing in after 10 years, cost | 16 | 17
Investment securities available for sale, cost | 10,083 | 9,215
Non-amortizing securities maturing in one year or less, fair value | 48 | 0
Non-amortizing securities maturing in after one through five years, fair value | 1,914 | 2,048
Non-amortizing securities maturing in after five through 10 years, fair value | 481 | 548
Non-amortizing securities maturing in after 10 years, fair value | 15 | 17
Investment securities available for sale, fair value | 9,088 | 9,203
Investment securities held to maturity |  |
Non-amortizing securities maturing in one year or less, cost | 53 | 2
Non-amortizing securities maturing in after one through five years, cost | 1,334 | 0
Non-amortizing securities maturing in after five through 10 years, cost | 930 | 0
Investment securities held to maturity, cost | 9,661 | 3,809
Non-amortizing securities maturing in one year or less, fair value | 51 | 2
Non-amortizing securities maturing in after one through five years, fair value | 1,190 | 0
Non-amortizing securities maturing in after five through 10 years, fair value | 783 | 0
Investment securities held to maturity, cost, fair value | 8,166 | 3,759
Government agency |  |
Investment securities available for sale |  |
Without single maturity date, cost | 175 | 221
Without single maturity date, fair value | 173 | 221
Residential mortgage-backed securities |  |
Investment securities available for sale |  |
Without single maturity date, cost | 5,450 | 4,757
Without single maturity date, fair value | 4,784 | 4,729
Investment securities held to maturity |  |
Without single maturity date, cost | 4,510 | 2,322
Without single maturity date, fair value | 3,745 | 2,306
Commercial mortgage-backed securities |  |
Investment securities available for sale |  |
Without single maturity date, cost | 1,828 | 1,648
Without single maturity date, fair value | 1,673 | 1,640
Investment securities held to maturity |  |
Without single maturity date, cost | 2,834 | 1,485
Without single maturity date, fair value | $ 2,397 | $ 1,451

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