Fair Value Measurements Level 4 Fair Value Level 3 Roll Forward (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014		Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	$ 60,555				$ 59,384
Financial and Nonfinancial Liabilities, Fair Value Disclosure	1,085				1,095
Other Short-term Investments	3,651				4,883
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Marketable Securities, Fixed Maturities	520				488
Trading Securities, Equity	11				11
Available-for-sale Securities, Equity Securities	1,148				1,047
Reinsurance Recoverables	22,737				22,920
Separate Account Assets	135,803				134,702
Assets, Fair Value Disclosure	198,246				199,248
Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Fair Value Disclosure	520				488
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Fair Value Disclosure	402				348
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	444				106
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0				0
Other Short-term Investments	313				349
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Marketable Securities, Fixed Maturities	0				0
Trading Securities, Equity	11				11
Available-for-sale Securities, Equity Securities	910				786
Assets, Fair Value Disclosure	91,549				92,789
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	56,411				55,803
Financial and Nonfinancial Liabilities, Fair Value Disclosure	966				1,004
Other Short-term Investments	3,338				4,534
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Marketable Securities, Fixed Maturities	435				396
Trading Securities, Equity	0				0
Available-for-sale Securities, Equity Securities	136				163
Assets, Fair Value Disclosure	101,703				101,735
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	3,700				3,475
Financial and Nonfinancial Liabilities, Fair Value Disclosure	119				91
Other Short-term Investments	0				0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	578		737
Total realized/unrealized gains (losses) included in net income	0	[1],[2],[3]	5	[1],[2],[3]
Purchases	38		130
Settlements	(5)		(1)
Sales	(6)		(86)
Transfers into Level 3	1	[4]	3	[4]
Transfers out of Level 3	(4)	[4]	(26)	[4]
Fair value, Ending Balance	602		762
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period			5	[1],[5]
Marketable Securities, Fixed Maturities	85				92
Trading Securities, Equity	0				0
Available-for-sale Securities, Equity Securities	102				98
Assets, Fair Value Disclosure	4,994				4,724
Fair Value, Inputs, Level 3 [Member] | Limited Partnerships and Other Alternative Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	189		108
Total realized/unrealized gains (losses) included in net income	1	[1],[2],[3]	3	[1],[2],[3]
Purchases			30
Settlements	0		0
Sales			(24)
Transfers out of Level 3			(10)	[4]
Fair value, Ending Balance	190		107
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	1	[1],[5]	3	[1],[5]
Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	92		193
Total realized/unrealized gains (losses) included in net income	(5)		10
Purchases	12		5
Sales	(4)		(2)
Transfers into Level 3			1
Transfers out of Level 3	(10)		(1)
Fair value, Ending Balance	85		206
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(1)		10
Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	336	[6]	297	[6]	313	[6]	296	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	18	[1],[2],[3],[6]	(47)	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Purchases	40	[6]	17	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	35	[6]	7	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Transfers Out of Level Three			(24)	[4],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	7	[1],[5],[6]	(60)	[1],[5],[6]
GMWB Reinsurance [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	65				56
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	0				0
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	0				0
GMWB Reinsurance [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	65				56
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	22				34
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	0				0
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	22				34
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reinsurance Recoverables	0				0
Credit Risk Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	(11)	[6]	0	[6]	(9)	[6]	2	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	5	[1],[2],[3],[6]	(2)	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Purchases	(7)	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	5	[1],[5],[6]	(1)	[1],[5],[6]
Equity Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	8	[6]	2	[6]	6	[6]	3	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	17	[1],[2],[3],[6]	(1)	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	15	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	3	[1],[5],[6]
Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	(18)	[6]	28	[6]	(7)	[6]	18	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	(11)	[1],[2],[3],[6]	(14)	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Transfers Out of Level Three			(24)	[4],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	(19)	[1],[5],[6]	(16)	[1],[5],[6]
Other Contract [Member] | Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	11	[6]	16	[6]	12	[6]	17	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	(1)	[1],[2],[3],[6]	(1)	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	(1)	[1],[5],[6]
Fair Value, Measurements, Recurring [Member] | Other Liabilities [Member] | Embedded Derivative Financial Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	(3)		(2)		(3)		(2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	0		0
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	0		0
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	0		0
Fair Value, Measurements, Recurring [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	(202)		(39)		(165)		(48)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	(19)		34
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	(18)		(25)
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	(19)		34
Fair Value, Measurements, Recurring [Member] | Other Policyholder Funds and Benefits Payable [Member] | Equity Linked Notes [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	(26)		(19)		(26)		(18)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	0		(1)
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	0		0
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	0		(1)
International [Member] | International Program Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value			(5)	[6]			(29)	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings			15	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Purchases			9	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease			17	[1],[5],[6]
UNITED STATES | Reinsurance Recoverables [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	65		30		56		29
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	4	[1],[2],[3]	(4)	[1],[2],[3]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	5		5
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	4	[1],[5]	(4)	[1],[5]
UNITED STATES | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	159	[6]	123	[6]	170	[6]	146	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	9	[1],[2],[3],[6]	(34)	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Purchases			4	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	20	[6]	7	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	16	[1],[5],[6]	(50)	[1],[5],[6]
UNITED STATES | US Macro Hedge Program [Member] | Fair Value, Inputs, Level 3 [Member] | Free standing Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	187	[6]	133	[6]	141	[6]	139	[6]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	(1)	[1],[2],[3],[6]	(10)	[1],[2],[3],[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Purchases	47	[6]	4	[6]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	3	[1],[5],[6]	(10)	[1],[5],[6]
UNITED STATES | Other Policyholder Funds and Benefits Payable [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value	(176)		(24)		(139)		(36)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings	(19)	[1],[2],[3]	36	[1],[2],[3]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements	(18)		(24)
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease	(19)	[1],[5]	36	[1],[5]
International [Member] | Fair Value, Measurements, Recurring [Member] | Other Policyholder Funds and Benefits Payable [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value			2				3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings			0
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements			(1)
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease			0
International [Member] | Fair Value, Measurements, Recurring [Member] | Other Policyholder Funds and Benefits Payable [Member] | Other Guaranteed Living Benefits [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Value			2				3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Gain Loss Included in Earnings			(1)
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Settlements			0
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Netted Against Liability Period Increase Decrease			(1)
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	3,475		4,154
Total realized/unrealized gains (losses) included in net income	(8)	[1],[2],[3]	6	[1],[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(14)	[7]	26	[7]
Purchases	384		261
Settlements	(69)		(94)
Sales	(54)		(220)
Transfers into Level 3	149	[4]	139	[4]
Transfers out of Level 3	(163)	[4]	(209)	[4]
Fair value, Ending Balance	3,700		4,063
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(5)	[1],[5]	(11)	[1],[5]
Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	98	[6]	77	[6]
Total realized/unrealized gains (losses) included in net income	1	[1],[2],[3]	(2)	[1],[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(3)	[7]	4	[7]
Purchases	8	[6]
Sales	(2)	[6]
Fair value, Ending Balance	102	[6]	79	[6]
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	1	[1],[5]	(2)	[1],[5]
US Treasury Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	4,513				3,872
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	444				106
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	4,069				3,766
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
Residential Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	4,078				3,918
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	2,615				2,637
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	1,463				1,281
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	1,463				1,281
Residential Mortgage Backed Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	1,281		1,272
Total realized/unrealized gains (losses) included in net income	(1)	[1],[2],[3]	(1)	[1],[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(1)	[7]	14	[7]
Purchases	310		147
Settlements	(46)		(46)
Sales	(31)		(42)
Transfers into Level 3	4	[4]
Transfers out of Level 3	(53)	[4]	(16)	[4]
Fair value, Ending Balance	1,463		1,328
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(1)	[1],[5]
Corporate Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	27,119				27,359
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	26,007				26,319
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	1,112				1,040
Corporate Debt Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	1,040		1,274
Total realized/unrealized gains (losses) included in net income	(4)	[1],[2],[3]	(14)	[1],[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(28)	[7]	24	[7]
Purchases	5		37
Settlements	1		1
Sales	(7)		(78)
Transfers into Level 3	139	[4]	67	[4]
Transfers out of Level 3	(34)	[4]	(68)	[4]
Fair value, Ending Balance	1,112		1,243
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(2)	[1],[5]	(17)	[1],[5]
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	12,842				12,871
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	12,778				12,805
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	64				66
US States and Political Subdivisions Debt Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	66		69
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(2)	[7]	3	[7]
Purchases			12
Transfers out of Level 3			(6)	[4]
Fair value, Ending Balance	64		78
Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	2,982	[8]			2,841	[8]
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	2,398				2,218
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	584				623
Collateralized Debt Obligations [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	623		664
Total realized/unrealized gains (losses) included in net income	(2)	[1],[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	19	[7]
Settlements	(9)		(14)
Transfers into Level 3			72	[4]
Transfers out of Level 3	(47)	[4]	(10)	[4]
Fair value, Ending Balance	584		712
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(1)	[1],[5]
Commercial Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	4,652				4,415
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	4,384				4,131
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	268				284
Commercial Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	268				284
Commercial Mortgage Backed Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	284		663
Total realized/unrealized gains (losses) included in net income	(1)	[1],[2],[3]	23	[1],[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(3)	[7]	(22)	[7]
Purchases	21		65
Settlements	(13)		(33)
Sales			(87)
Transfers into Level 3	5	[4]
Transfers out of Level 3	(25)	[4]	(17)	[4]
Fair value, Ending Balance	268		592
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period	(1)	[1],[5]	8	[1],[5]
Asset-backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	3,004				2,472
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	2,843				2,350
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	161				122
Asset-backed Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	122		147
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)			2	[7]
Purchases	43
Settlements	(1)		(1)
Transfers into Level 3	1	[4]
Transfers out of Level 3	(4)	[4]	(92)	[4]
Fair value, Ending Balance	161		56
Foreign Government Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	1,365				1,636
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	0				0
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	1,317				1,577
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	48				59
Foreign Government Debt Securities [Member] | Available-for-sale Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, Beginning Balance	59		65
Total realized/unrealized gains (losses) included in net income			(2)	[1],[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	1	[7]	5	[7]
Purchases	5
Settlements	(1)		(1)
Sales	(16)		(13)
Fair value, Ending Balance	48		54
Changes in unrealized gains (losses) included in net income related to financial instruments still held at end of period			$ (2)	[1],[5]

[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 of DAC.

[2] [1]The Company classifies gains and losses on GMWB reinsurance derivatives and GMWB 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] [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.

[5] [7]Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein.

[6] [5]Derivative instruments are reported in this table on a net basis for asset (liability) positions and reported in the Condensed Consolidated Balance Sheets in other investments and other liabilities.

[7] [3]All amounts are before income taxes and amortization of DAC.

[8] Gross unrealized gains (losses) exclude the fair value of bifurcated, embedded derivative features of certain securities. Subsequent changes in value are recorded in net realized capital gains (losses).