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Investments (Realized Gain (Loss) Related To Certain Investments) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Realized gain (loss) related to certain investments |  |  |  |  |
Gain (loss) on other investments | [1] | $ 1 |  | $ 6 | $ (6)
Associated amortization of DAC, VOBA, DSI and DFEL and changes in other contract holder funds |  | (5) | $ (5) | (16) | (17)
Total realized gain (loss) related to certain investments, pre-tax | [2] | (11) | (19) | (45) | (49)
Fixed Maturity AFS Securities [Member] |  |  |  |  |
Realized gain (loss) related to certain investments |  |  |  |  |
AFS securities. Gross gains | [3] | 14 | 7 | 30 | 19
AFS securities. Gross losses | [3] | (21) | (22) | (65) | (47)
Equity AFS Securities [Member] |  |  |  |  |
Realized gain (loss) related to certain investments |  |  |  |  |
AFS securities. Gross gains |  |  | $ 1 |  | $ 2
Equity Securities [Member] |  |  |  |  |
Realized gain (loss) related to certain investments |  |  |  |  |
Gain (loss) on other investments |  | $ 1 |  | $ 2 |
[1] | Includes market adjustments on equity securities still held of less than $1 million and $2 million for the three and nine months ended September 30, 2018, respectively.
[2] | See "Realized Gain (Loss) Related to Certain Investments" section in Note 5.
[3] | These amounts are represented net of related fair value hedging activity. See Note 6 for more information.

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