Investments (Net Inv Inc summary) (Details 2) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Investment income on fixed maturities	$ 340	$ 342	$ 1,012	$ 1,028
Net realized gains (losses)	(3)	6	35	(5)
Affordable housing partnerships	(17)	(17)	(42)	(35)
Other	26	25	70	13
Consolidated investment entities	26	31	79	89
Total	$ 372	$ 387	$ 1,154	$ 1,090

Represents the equity method losses related to investments in affordable housing partnerships.

No definition available.

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- Definition

Represents the income from investments in consolidated investment entities.

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No definition available.

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- Definition

Represents the income from investments not otherwise specified in financial statements.

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No definition available.

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- Definition

Interest income on fixed maturity securities classified as Available-for-Sale, commercial mortgage loans, policy loans, consumer loans, other investments and cash and cash equivalents; the changes in fair value of trading securities, including seed money, certain derivatives, and assets and liabilities of consolidated investment entities; the pro rata share of net income or loss on equity method investments; and realized gains and losses on the sale of securities and charges for investments determined to be other-than-temporarily impaired.

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No definition available.

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- Definition

The net realized gains or losses on investments during the period.

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No definition available.

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- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(b))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- References

No definition available.

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