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Debt Securities (Schedule Of Contractual Maturities Of Investment Securities) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Available-for-sale securities, due within one year, amortized cost | $ 344 |
Available-for-sale securities, after one year through five years, amortized cost | 2,755 |
Available-for-sale securities, after five years through ten years, amortized cost | 1,763 |
Available-for-sale securities, after ten years, amortized cost | 6,472 |
Available-for-sale securities, amortized cost | 11,334 | $ 8,858
Available-for-sale securities, due within one year, fair value | 344 |
Available-for-sale securities, after one year through five years, fair value | 2,744 |
Available-for-sale securities, after five years through ten years, fair value | 1,736 |
Available-for-sale securities, after ten years, fair value | 6,189 |
Debt Securities, Available-for-sale | 11,013 | 8,275
Held-to-maturity securities, due within one year, amortized cost | 0 |
Held-to-maturity securities, after one year through five years, amortized cost | 0 |
Held-to-maturity securities, after five years through ten years, amortized cost | 0 |
Held-to-maturity securities, after ten years, amortized cost | 18 |
Investment securities held to maturity | 18 | 2
Held-to-maturity securities, due within one year, fair value | 0 |
Held-to-maturity securities, after one year through five years, fair value | 0 |
Held-to-maturity securities, after five years through ten years, fair value | 0 |
Held-to-maturity securities, after ten years, fair value | 18 |
Held-to-maturity securities, fair value | $ 18 | $ 3

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