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Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2017 USD ($)
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | $ 32,637 |
Remaining Life - 1 - 5 Years | 32,367 |
Remaining Life - 6 - 10 Years | 31,421 |
Remaining Life - 11 - 30 Years | 15,903 |
Remaining Life Over - 30 Years | 2,665 |
Remaining Life - Total Years | 114,993 |
Interest rate contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | 15,024 | [1]
Remaining Life - 1 - 5 Years | 22,369 | [1]
Remaining Life - 6 - 10 Years | 30,174 | [1]
Remaining Life - 11 - 30 Years | 14,926 | [1]
Remaining Life Over - 30 Years | 1,213 | [1]
Remaining Life - Total Years | $ 83,706 | [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 | $ 19 | [2]
Remaining Life - 1 - 5 Years | 151 | [2]
Remaining Life - 6 - 10 Years | 378 | [2]
Remaining Life - 11 - 30 Years | 962 | [2]
Remaining Life Over - 30 Years | 10 | [2]
Remaining Life - Total Years | $ 1,520 | [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 | $ 17,594 |
Remaining Life - 1 - 5 Years | 9,784 |
Remaining Life - 6 - 10 Years | 869 |
Remaining Life - 11 - 30 Years | 15 |
Remaining Life Over - 30 Years | 1,442 |
Remaining Life - Total Years | 29,704 |
Credit contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year |  |
Remaining Life - 1 - 5 Years | 63 |
Remaining Life - 6 - 10 Years |  |
Remaining Life - 11 - 30 Years |  |
Remaining Life Over - 30 Years |  |
Remaining Life - Total Years | $ 63 |
[1] | As of June 30, 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 June 30, 2017, 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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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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