Investments and Derivative Instruments Level 4 Variable Interest Entities (Details) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014
Consolidated Variable Interest Entities [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		$ 166		$ 246
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	[1]	12		6
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[2]	153		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		7		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]	5		5
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[2]	0		0
Fixed Income Funds [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Consolidated Variable Interest Entities [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets		159	[4]	238
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	[1]	7		0
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	[2]	151		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 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 Consolidated Balance Sheets.

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