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Investment Securities (Contractual Maturity Distribution Of Debt Securities) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Investment securities available-for-sale, Amortized Cost | $ 22,785 | $ 17,116
Investment securities available-for-sale, Fair Value | 20,829 | $ 16,986
Debt securities |  |
Available-for-sale, Within one year, Amortized Cost | 1,101 |
Available-for-sale, After one year through five years, Amortized Cost | 2,092 |
Available-for-sale, After five years through ten years, Amortized Cost | 5,018 |
Available-for-sale, After ten years, Amortized Cost | 14,574 |
Investment securities available-for-sale, Amortized Cost | 22,785 |
Available-for-sale, Within one year, Fair Value | 1,096 |
Available-for-sale, After one year through five years, Fair Value | 1,971 |
Available-for-sale, After five years through ten years, Fair Value | 4,787 |
Available-for-sale, After ten years, Fair Value | 12,975 |
Investment securities available-for-sale, Fair Value | $ 20,829 |

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. + References No definition available. + Details
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- Definition Amortized cost of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. + References No definition available. + Details
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