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Debt Securities (Schedule Of Cost And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity By Contractual Maturity) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities held to maturity, amortized cost | $ 5,170 | $ 763
Debt Securities held to maturity, estimated fair value | 4,226 | 716
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost | 330 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 326 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost | 2,009 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value | 1,931 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost | 743 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value | 726 |
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost | 138 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value | 124 |
Debt Securities, Available-for-sale, Amortized Cost | 28,183 | 30,864
Debt securities available for sale | 26,224 | 28,104
Residential agency |  |
Debt Securities held to maturity, amortized cost | 4,663 | 247
Debt Securities held to maturity, estimated fair value | 3,734 | 223
Debt Securities, Available-for-sale, Amortized Cost | 20,482 | 19,450
Debt securities available for sale | 18,945 | 17,372
Commercial agency |  |
Debt Securities held to maturity, amortized cost | 507 | 516
Debt Securities held to maturity, estimated fair value | 492 | 493
Debt Securities, Available-for-sale, Amortized Cost | 4,389 | 7,807
Debt securities available for sale | 4,090 | 7,307
Commercial non-agency |  |
Debt Securities, Available-for-sale, Amortized Cost | 92 | 93
Debt securities available for sale | $ 82 | $ 83

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