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Investments (Realized Gain (Loss) Related To Certain Investments) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Realized gain (loss) related to certain investments |  |  |  |  |
Gain (loss) on other investments |  |  | $ (4) | $ (6) | $ (67)
Associated amortization of DAC, VOBA, DSI and DFEL and changes in other contract holder funds |  | $ (5) | (7) | (17) | (15)
Total realized gain (loss) related to certain investments, pre-tax | [1] | (19) | (42) | (49) | (213)
Fixed maturity AFS securities [Member] |  |  |  |  |
Realized gain (loss) related to certain investments |  |  |  |  |
AFS securities. Gross gains | [2] | 7 | 2 | 19 | 64
AFS securities. Gross losses | [2] | (22) | (37) | (47) | (200)
Equity AFS securities [Member] |  |  |  |  |
Realized gain (loss) related to certain investments |  |  |  |  |
AFS securities. Gross gains |  | 1 | 4 | 2 | 6
AFS securities. Gross losses |  |  |  |  | $ (1)
[1] | See "Realized Gain (Loss) Related to Certain Investments" section in Note 4.
[2] | These amounts are represented net of related fair value hedging activity. See Note 5 for more information.

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- Definition Represents the amortization of deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads and changes in other contract holder funds and funds withheld reinsurance liabilities associated with realized gains and losses related to certain investments. + References No definition available. + Details
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