Investments and Derivative Instruments Level 4 Variable Interest Entities (Details) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Consolidated Variable Interest Entities [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		$ 205	$ 246
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	[1]	5	6
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[2]	203	245
Variable Interest Entity, Not Primary Beneficiary [Member]
Consolidated Variable Interest Entities [Abstract]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount		3	3
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets		8	12
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities		8	14
Collateralized Debt Obligations [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Consolidated Variable Interest Entities [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	[3]	5	5
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	[1],[3]	5	5
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[2],[3]	0	0
Fixed Income Funds [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Consolidated Variable Interest Entities [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	[4]	198	238
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	[1],[4]	0	0
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[2],[4]	201	243
Limited Partnerships and Other Alternative Investments [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Consolidated Variable Interest Entities [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		2	3
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	[1]	0	1
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[2]	$ 2	$ 2

[1] Included in other liabilities in the Company’s Condensed Consolidated Balance Sheets.

[2] The maximum exposure to loss represents the maximum loss amount that the Company could recognize as a reduction in net investment income or as a realized capital loss and is the cost basis of the Company’s investment.

[3] Total assets included in cash in the Company’s Condensed Consolidated Balance Sheets.

[4] Total assets included in fixed maturities, FVO, short-term investments, equity, AFS, and cash in the Company’s Condensed Consolidated Balance Sheets.