DAC, VOBA, DSI, and DFEL (DSI) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes in DSI [Roll Forward]
Balance as of beginning-of-year	$ 267us-gaap_DeferredSalesInducementsNet	$ 253us-gaap_DeferredSalesInducementsNet	$ 271us-gaap_DeferredSalesInducementsNet
Deferrals	13	10	39
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(38)	(43)	(46)
Unlocking	2	8	14
Adjustment related to realized (gains) losses	(4)	(1)	(8)
Adjustment related to unrealized (gains) losses		40	(17)
Balance as of end-of-year	$ 240us-gaap_DeferredSalesInducementsNet	$ 267us-gaap_DeferredSalesInducementsNet	$ 253us-gaap_DeferredSalesInducementsNet

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Amount of amortization of deferred sales inducement costs attributable to realized investment gains (losses).

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of amortization of deferred sales inducement costs attributable to unrealized investment gains (losses).

+ References

No definition available.

+ Details

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- Definition

The amount of adjustment to amortization of deferred sales inducement costs arising from a revision in estimated gross profit (when such amount serves as the basis for allocating amortization of DSI to reporting periods).

+ References

No definition available.

+ Details

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- Definition

The amount of other amortization of deferred sales inducement costs, net of interest, during the period.

+ References

No definition available.

+ Details

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- Definition

The amount of deferred sales inducement costs capitalized during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 30

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6481800&loc=d3e11332-158416

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The unamortized carrying amount of deferred sales inducement costs as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 30

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6481800&loc=d3e11332-158416

+ Details

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- Details

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