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Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2019 USD ($)
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | $ 33,971 |
Remaining Life - 1 - 5 Years | 15,189 |
Remaining Life - 6 - 10 Years | 54,468 |
Remaining Life - 11 - 30 Years | 25,874 |
Remaining Life Over - 30 Years | 4,942 |
Remaining Life - Total Years | 134,444 |
Interest rate contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | 11,465 | [1]
Remaining Life - 1 - 5 Years | 9,727 | [1]
Remaining Life - 6 - 10 Years | 51,648 | [1]
Remaining Life - 11 - 30 Years | 24,583 | [1]
Remaining Life Over - 30 Years | 1,713 | [1]
Remaining Life - Total Years | $ 99,136 | [1]
Derivative maturity date | Apr. 01, 2067 |
Foreign currency contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | $ 66 | [2]
Remaining Life - 1 - 5 Years | 264 | [2]
Remaining Life - 6 - 10 Years | 764 | [2]
Remaining Life - 11 - 30 Years | 1,278 | [2]
Remaining Life Over - 30 Years | 81 | [2]
Remaining Life - Total Years | $ 2,453 | [2]
Derivative maturity date | Sep. 01, 2049 |
Equity market contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | $ 22,440 |
Remaining Life - 1 - 5 Years | 5,198 |
Remaining Life - 6 - 10 Years | 1,996 |
Remaining Life - 11 - 30 Years | 13 |
Remaining Life Over - 30 Years | 3,148 |
Remaining Life - Total Years | 32,795 |
Credit contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life - 6 - 10 Years | 60 |
Remaining Life - Total Years | $ 60 |
[1] | As of March 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 2067.
[2] | As of March 31, 2019, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was September 2049.

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Total notional amounts of derivative financial instruments maturing in 11 - 30 years. + References No definition available. + Details
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- Definition Total notional amounts of derivative financial instruments maturing in 1 - 5 years. + References No definition available. + Details
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- Definition Total notional amounts of derivative financial instruments maturing in 6 - 10 years. + References No definition available. + Details
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- Definition Total notional amounts of derivative financial instruments maturing in less than 1 year. + References No definition available. + Details
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- Definition Total notional amounts of derivative financial instruments with maturity dates over 30 years + References No definition available. + Details
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- References No definition available. + Details
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