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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.

X

- 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.

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- Definition

-

+ References

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- References

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X

- Definition

This item represents the net realized gain (loss) included in earnings for the period related to certain investments.

+ References

No definition available.

+ Details

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X

- Definition

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563

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- Definition

This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563

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