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Investments (Realized Gain (Loss) Related To Certain Investments) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Realized gain (loss) related to certain investments |  |  |  |  |
Gain (loss) on other investments |  | $ (2) | $ (3) | $ (5) | $ (63)
Associated amortization of DAC, VOBA, DSI and DFEL and changes in other contract holder funds |  | (6) | (5) | (13) | (8)
Total realized gain (loss) related to certain investments, pre-tax | [1] | (18) | (65) | (31) | (172)
Fixed maturity AFS securities [Member] |  |  |  |  |
Realized gain (loss) related to certain investments |  |  |  |  |
AFS securities. Gross gains | [2] | 3 | 7 | 11 | 61
AFS securities. Gross losses | [2] | (13) | (65) | (25) | (163)
Equity AFS securities [Member] |  |  |  |  |
Realized gain (loss) related to certain investments |  |  |  |  |
AFS securities. Gross gains |  |  | 2 | 1 | 2
AFS securities. Gross losses |  |  | $ (1) |  | $ (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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