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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Accumulated Other Comprehensive Income Level 4 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended				9 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 1,221				$ 574				$ 1,221	$ 574	$ 1,987	$ 953
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax									671	(423)	1,114
Gain (Loss) on Investments, Excluding Other than Temporary Impairments									606	(1,190)	(1,226)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest									861	561	531
Income Tax Expense (Benefit)									184us-gaap_IncomeTaxExpenseBenefit	49us-gaap_IncomeTaxExpenseBenefit	36us-gaap_IncomeTaxExpenseBenefit	36us-gaap_IncomeTaxExpenseBenefit
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax									(24)	(990)	(80)
Other Comprehensive Income (Loss), Net of Tax									647	(1,413)	1,034	1,034
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	130us-gaap_ProfitLoss	91us-gaap_ProfitLoss	399us-gaap_ProfitLoss	57us-gaap_ProfitLoss	(81)us-gaap_ProfitLoss	201us-gaap_ProfitLoss	(35)us-gaap_ProfitLoss	386us-gaap_ProfitLoss	677us-gaap_ProfitLoss	471us-gaap_ProfitLoss	556us-gaap_ProfitLoss	556us-gaap_ProfitLoss
Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net									36	131			178
Cash Flow Hedging [Member] \| Retirement Plans and Individual Life Businesses [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net										71
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	97		97
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	(4)		(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	85		85
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									24	990	80
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] \| 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									50
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	1,154				495				1,154	495	1,752	632
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax									660	(352)	1,084
Gain (Loss) on Investments, Excluding Other than Temporary Impairments									1	1,392	(55)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest										1,392
Income Tax Expense (Benefit)									0	487	(19)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax									(1)	(905)	36
Other Comprehensive Income (Loss), Net of Tax									659	(1,257)	1,120
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	1,400	(55)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest									1		(55)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax									1	905	(36)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	70				79				70	79	258	368
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax									14	(94)	6
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax									(23)	(85)	(116)
Other Comprehensive Income (Loss), Net of Tax									(9)	(179)	(110)
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)									13	46	62
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									36	131	178
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax									23	85	116
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3)				0				(3)	0	(23)	(47)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax									(3)	23	24
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax									0	0	0
Other Comprehensive Income (Loss), Net of Tax									$ (3)	$ 23	$ 24