Investments and Derivative Instruments (Details 14) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Net Derivatives, Notional Amount	$ 141,307	$ 159,441
Net Derivatives, Fair Value	(591)	(737)
Asset Derivatives, Fair Value	1,522	1,948
Liability Derivatives, Fair Value	2,113	2,685
Contingent Capital Facility Put Option [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	500	500
Net Derivatives, Fair Value	16	17
Asset Derivatives, Fair Value	16	17
Liability Derivatives, Fair Value	0	0
Fixed maturities, AFS [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	479	473
Net Derivatives, Fair Value	(4)	(2)
Asset Derivatives, Fair Value	0	1
Liability Derivatives, Fair Value	(4)	(3)
Other Investments [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	53,415	53,219
Net Derivatives, Fair Value	249	442
Asset Derivatives, Fair Value	674	909
Liability Derivatives, Fair Value	(425)	(467)
Other liabilities [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	60,266	78,055
Net Derivatives, Fair Value	(806)	(1,223)
Asset Derivatives, Fair Value	814	936
Liability Derivatives, Fair Value	(1,620)	(2,159)
Consumer Notes [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	9	9
Net Derivatives, Fair Value	(2)	(2)
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(2)	(2)
Reinsurance Recoverables [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	5,541	5,758
Net Derivatives, Fair Value	11	96
Asset Derivatives, Fair Value	30	96
Liability Derivatives, Fair Value	(19)	0
Other policyholder funds and benefits payable [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	21,597	21,927
Net Derivatives, Fair Value	(39)	(48)
Asset Derivatives, Fair Value	4	6
Liability Derivatives, Fair Value	(43)	(54)
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	1,261	1,250
Net Derivatives, Fair Value	(19)	67
Asset Derivatives, Fair Value	0	67
Liability Derivatives, Fair Value	$ (19)	$ 0