Accumulated Other Comprehensive Income Level 4 (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 8,162				$ 9,291				$ 8,162	$ 9,291	$ 8,239		$ 10,383
Accumulated Other Comprehensive Income (Loss), Net of Tax		593				1,221				593	1,221	574		1,987
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax										(631)	671	(423)
Gain (Loss) on Investments, Excluding Other than Temporary Impairments										(85)	606	(1,190)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest										530	861	561
Income Tax Expense (Benefit)										30	184	49
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										3	(24)	(990)
Other Comprehensive Income (Loss), Net of Tax										(628)	647	(1,413)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		7	$ 118	$ 230	$ 145	130	$ 91	$ 399	$ 57	500	677	471
Derivative, Gain (Loss) on Derivative, Net	[1]									(97)	723	(1,705)
Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										23	36	131
Investment Income [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net											50	57
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Currency Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										(9)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										(1)
Gain (Loss) on Investments [Member] | Currency Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net											(13)	4
Gain (Loss) on Investments [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net											(1)	70	[2]
Interest Income [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										33
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										(3)	24	990
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										(1)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Currency Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										(9)	(13)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net											(1)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest Income [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										33	50
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		539				1,154				539	1,154	495
Accumulated Other Comprehensive Income (Loss), Net of Tax												495		1,752
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax										(633)	660	(352)
Gain (Loss) on Investments, Excluding Other than Temporary Impairments										(27)	1	1,392	[3]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest											1
Income Tax Expense (Benefit)										(9)	0	487
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										18	(1)	(905)
Other Comprehensive Income (Loss), Net of Tax												(1,257)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax										(615)	659
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Retirement Plans and Individual Life Businesses [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (Loss) on Investments, Excluding Other than Temporary Impairments												1,500
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (Loss) on Investments, Excluding Other than Temporary Impairments										0	1,000	1,400
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest										(27)		1,392
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										(18)	1	905
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		57				70				57	70	79
Accumulated Other Comprehensive Income (Loss), Net of Tax												79		258
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax										2	14	(94)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										(15)	(23)	(85)
Other Comprehensive Income (Loss), Net of Tax												(179)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax										(13)	(9)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income Tax Expense (Benefit)										8	13	46
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest										23	36	131
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										15	23	85
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(3)				(3)				(3)	(3)	0
Accumulated Other Comprehensive Income (Loss), Net of Tax												0		(23)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax										0	(3)	23
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax										0	0	0
Other Comprehensive Income (Loss), Net of Tax												23
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax										0	(3)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 593				$ 1,221				$ 593	1,221	574		$ 1,987
Other Comprehensive Income (Loss), Net of Tax											$ 647	(1,413)
Retirement Plans and Individual Life Businesses [Member] | UNITED STATES | Cash Flow Hedging [Member] | Retirement Plans and Individual Life Businesses [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	[4]											$ 71

[1] [4]Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 2 - Fair Value Measurements.

[2] The December 31, 2013 amounts includes $71 of net gains on cash flow hedging instruments relating to the sales of the Retirement Plans and Individual Life businesses.

[3] The December 31, 2013 amounts includes $1.5 billion of net unrealized gains on securities relating to the sales of the Retirement Plans and Individual Life businesses.

[4] he associated liability is adjusted for changes in spot rates through realized capital gains and was $4, $116 and $250 for the years ended December 31, 2015, 2014 and 2013, respectively, which is not presented in this table.