Fair Value Measurements (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Fixed Maturities, FVO [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	$ 193		$ 214
Total realized/unrealized gains (losses) included in net income	10	[1],[2],[3]	15	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI		[4]		[4]
Purchases	5		6
Settlements			(1)
Sales	(2)		(18)
Transfers into Level 3	1	[5]	1	[5]
Transfers out of Level 3	(1)	[5]	(1)	[5]
Fair value, Ending Balance	206		216
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	10	[1],[6]	36	[1],[6]
Minimum [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Two [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate	0.00%		0.00%
Minimum [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Three [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Probability of Default	1.00%		1.00%
Minimum [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Four [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Loss Severity	0.00%		0.00%
Maximum [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Two [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate	10.00%		10.00%
Maximum [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Three [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Probability of Default	22.00%		22.00%
Maximum [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Four [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Loss Severity	100.00%		100.00%
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Two [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Prepayment Rate	3.00%		3.00%	[7]
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Three [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Probability of Default	7.00%		8.00%	[7]
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities Four [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Loss Severity	80.00%		80.00%	[7]
Available-for-sale Securities [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	4,154		5,738
Total realized/unrealized gains (losses) included in net income	6	[1],[2],[3]	26	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	26	[4]	122	[4]
Purchases	261		159
Settlements	(94)		(154)
Sales	(220)		(800)
Transfers into Level 3	139	[5]	128	[5]
Transfers out of Level 3	(209)	[5]	(99)	[5]
Fair value, Ending Balance	4,063		5,120
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(11)	[1],[6]	(13)	[1],[6]
Residential Mortgage Backed Securities [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	1,272		1,373
Total realized/unrealized gains (losses) included in net income	(1)	[1],[2],[3]	29	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	14	[4]	20	[4]
Purchases	147		91
Settlements	(46)		(41)
Sales	(42)		(192)
Transfers into Level 3		[5]		[5]
Transfers out of Level 3	(16)	[5]		[5]
Fair value, Ending Balance	1,328		1,280
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period		[1],[6]		[1],[6]
US States and Political Subdivisions Debt Securities [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	69		227
Total realized/unrealized gains (losses) included in net income		[1],[2],[3]		[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	3	[4]	1	[4]
Purchases	12		6
Settlements
Sales			(39)
Transfers into Level 3		[5]		[5]
Transfers out of Level 3	(6)	[5]	(44)	[5]
Fair value, Ending Balance	78		151
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period		[1],[6]		[1],[6]
Foreign Government Debt Securities [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	65		56
Total realized/unrealized gains (losses) included in net income	(2)	[1],[2],[3]		[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	5	[4]	(2)	[4]
Purchases			12
Settlements	(1)		(1)
Sales	(13)		(8)
Transfers into Level 3		[5]		[5]
Transfers out of Level 3		[5]	(6)	[5]
Fair value, Ending Balance	54		51
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(2)	[1],[6]		[1],[6]
Corporate Debt Securities [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	1,274		2,001
Total realized/unrealized gains (losses) included in net income	(14)	[1],[2],[3]	17	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	24	[4]	(12)	[4]
Purchases	37		26
Settlements	1		(59)
Sales	(78)		(281)
Transfers into Level 3	67	[5]	70	[5]
Transfers out of Level 3	(68)	[5]	(40)	[5]
Fair value, Ending Balance	1,243		1,722
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(17)	[1],[6]	(4)	[1],[6]
Commercial Mortgage Backed Securities [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	663		859
Total realized/unrealized gains (losses) included in net income	23	[1],[2],[3]	(5)	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	(22)	[4]	45	[4]
Purchases	65
Settlements	(33)		(24)
Sales	(87)		(61)
Transfers into Level 3		[5]	26	[5]
Transfers out of Level 3	(17)	[5]		[5]
Fair value, Ending Balance	592		840
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	8	[1],[6]	(3)	[1],[6]
Collateralized Debt Obligations [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	664		944
Total realized/unrealized gains (losses) included in net income		[1],[2],[3]	(12)	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI		[4]	45	[4]
Purchases			1
Settlements	(14)		(24)
Sales			(185)
Transfers into Level 3	72	[5]	32	[5]
Transfers out of Level 3	(10)	[5]		[5]
Fair value, Ending Balance	712		801
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period		[1],[6]	(2)	[1],[6]
Asset-backed Securities [Member] | Fixed Maturities [Member]
Roll Forward of Financial Instruments (Assets) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)
Fair value, Beginning Balance	147		278
Total realized/unrealized gains (losses) included in net income		[1],[2],[3]	(3)	[1],[2],[3]
Total realized/unrealized gains (losses) included in OCI	2	[4]	25	[4]
Purchases			23
Settlements	(1)		(5)
Sales			(34)
Transfers into Level 3		[5]		[5]
Transfers out of Level 3	(92)	[5]	(9)	[5]
Fair value, Ending Balance	56		275
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period		[1],[6]	$ (4)	[1],[6]

[1] [2]All amounts in these rows are reported in net realized capital gains/(losses). The realized/unrealized gains (losses) included in net income for separate account assets are offset by an equal amount for separate account liabilities, which results in a net zero impact on net income for the Company. All amounts are before income taxes and amortization DAC.

[2] [1]The Company classifies gains and losses on GMWB reinsurance derivatives and Guaranteed Living Benefit embedded derivatives as unrealized gains (losses) for purposes of disclosure in this table because it is impracticable to track on a contract-by-contract basis the realized gains (losses) for these derivatives and embedded derivatives.

[3] 6]Includes both market and non-market impacts in deriving realized and unrealized gains (losses).

[4] [3]All amounts are before income taxes and amortization of DAC.

[5] [4]Transfers in and/or (out) of Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing inputs.

[6] [7]Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein.

[7] The weighted average is determined based on the fair value of the securities.