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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, 2017 USD ($)
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | $ 29,366 |
Remaining Life - 1 - 5 Years | 34,161 |
Remaining Life - 6 - 10 Years | 31,424 |
Remaining Life - 11 - 30 Years | 15,188 |
Remaining Life Over - 30 Years | 2,487 |
Remaining Life - Total Years | 112,626 |
Interest rate contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | 12,032 | [1]
Remaining Life - 1 - 5 Years | 25,178 | [1]
Remaining Life - 6 - 10 Years | 29,368 | [1]
Remaining Life - 11 - 30 Years | 14,478 | [1]
Remaining Life Over - 30 Years | 1,213 | [1]
Remaining Life - Total Years | $ 82,269 | [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 | $ 37 | [2]
Remaining Life - 1 - 5 Years | 151 | [2]
Remaining Life - 6 - 10 Years | 355 | [2]
Remaining Life - 11 - 30 Years | 695 | [2]
Remaining Life Over - 30 Years |  | [2]
Remaining Life - Total Years | $ 1,238 | [2]
Derivative maturity date | Dec. 01, 2045 |
Equity market contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | $ 17,297 |
Remaining Life - 1 - 5 Years | 8,832 |
Remaining Life - 6 - 10 Years | 1,645 |
Remaining Life - 11 - 30 Years | 15 |
Remaining Life Over - 30 Years | 1,274 |
Remaining Life - Total Years | 29,063 |
Credit contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year |  |
Remaining Life - 1 - 5 Years |  |
Remaining Life - 6 - 10 Years | 56 |
Remaining Life - 11 - 30 Years |  |
Remaining Life Over - 30 Years |  |
Remaining Life - Total Years | $ 56 |
[1] | As of March 31, 2017, 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, 2017, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was December 2045.

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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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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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