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Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2017 USD ($)
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | $ 26,589 |
Remaining Life - 1 - 5 Years | 31,017 |
Remaining Life - 6 - 10 Years | 32,148 |
Remaining Life - 11 - 30 Years | 16,441 |
Remaining Life Over - 30 Years | 2,660 |
Remaining Life - Total Years | 108,855 |
Interest rate contracts [Member] |  |
Maturity of the notional amounts of derivative financial instruments |  |
Remaining Life Less Than 1 Year | 8,901 | [1]
Remaining Life - 1 - 5 Years | 20,768 | [1]
Remaining Life - 6 - 10 Years | 30,938 | [1]
Remaining Life - 11 - 30 Years | 15,472 | [1]
Remaining Life Over - 30 Years | 1,213 | [1]
Remaining Life - Total Years | $ 77,292 | [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 | $ 36 | [2]
Remaining Life - 1 - 5 Years | 212 | [2]
Remaining Life - 6 - 10 Years | 391 | [2]
Remaining Life - 11 - 30 Years | 954 | [2]
Remaining Life Over - 30 Years | 11 | [2]
Remaining Life - Total Years | $ 1,604 | [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 | $ 17,652 |
Remaining Life - 1 - 5 Years | 10,037 |
Remaining Life - 6 - 10 Years | 819 |
Remaining Life - 11 - 30 Years | 15 |
Remaining Life Over - 30 Years | 1,436 |
Remaining Life - Total Years | 29,959 |
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 |  |
Remaining Life - 11 - 30 Years |  |
Remaining Life Over - 30 Years |  |
Remaining Life - Total Years |  |
[1] | As of September 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 September 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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