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Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Maturity of the notional amounts of derivative financial instruments |  |  |
Remaining Life Less Than 1 Year |  | $ 39,153 |
Remaining Life - 1 - 5 Years |  | 61,441 |
Remaining Life - 6 - 10 Years |  | 25,671 |
Remaining Life - 11 - 30 Years |  | 31,042 |
Remaining Life Over - 30 Years |  | 6,008 |
Remaining Life - Total Years |  | 163,315 | $ 137,497
Interest Rate Contracts [Member] |  |  |
Maturity of the notional amounts of derivative financial instruments |  |  |
Remaining Life Less Than 1 Year | [1] | 11,341 |
Remaining Life - 1 - 5 Years | [1] | 53,011 |
Remaining Life - 6 - 10 Years | [1] | 20,948 |
Remaining Life - 11 - 30 Years | [1] | 29,556 |
Remaining Life Over - 30 Years | [1] | 1,713 |
Remaining Life - Total Years | [1] | $ 116,569 |
Derivative maturity date |  | Apr. 20, 2067 |
Foreign currency contracts [Member] |  |  |
Maturity of the notional amounts of derivative financial instruments |  |  |
Remaining Life Less Than 1 Year | [2] | $ 218 |
Remaining Life - 1 - 5 Years | [2] | 383 |
Remaining Life - 6 - 10 Years | [2] | 961 |
Remaining Life - 11 - 30 Years | [2] | 1,473 |
Remaining Life Over - 30 Years | [2] | 101 |
Remaining Life - Total Years | [2] | $ 3,136 |
Derivative maturity date |  | Feb. 26, 2050 |
Equity market contracts [Member] |  |  |
Maturity of the notional amounts of derivative financial instruments |  |  |
Remaining Life Less Than 1 Year |  | $ 27,594 |
Remaining Life - 1 - 5 Years |  | 7,992 |
Remaining Life - 6 - 10 Years |  | 3,762 |
Remaining Life - 11 - 30 Years |  | 13 |
Remaining Life Over - 30 Years |  | 4,194 |
Remaining Life - Total Years |  | 43,555 |
Credit contracts [Member] |  |  |
Maturity of the notional amounts of derivative financial instruments |  |  |
Remaining Life - 1 - 5 Years |  | 55 |
Remaining Life - Total Years |  | $ 55 |
[1] | As of December 31, 2019, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was April 20, 2067.
[2] | As of December 31, 2019, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was February 26, 2050.

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