Investments and Derivative Instruments (Details 14) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Net Derivatives, Notional Amount	$ 94,451	$ 159,441
Net Derivatives, Fair Value	(538)	(737)
Asset Derivatives, Fair Value	1,095	1,948
Liability Derivatives, Fair Value	1,633	2,685
Contingent Capital Facility Put Option [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	500	500
Net Derivatives, Fair Value	15	17
Asset Derivatives, Fair Value	15	17
Liability Derivatives, Fair Value	0	0
Fixed maturities, AFS [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	475	473
Net Derivatives, Fair Value	3	(2)
Asset Derivatives, Fair Value	3	1
Liability Derivatives, Fair Value	0	(3)
Other Investments [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	31,441	53,219
Net Derivatives, Fair Value	239	442
Asset Derivatives, Fair Value	489	909
Liability Derivatives, Fair Value	(250)	(467)
Other liabilities [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	37,559	78,055
Net Derivatives, Fair Value	(821)	(1,223)
Asset Derivatives, Fair Value	525	936
Liability Derivatives, Fair Value	(1,346)	(2,159)
Consumer Notes [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	8	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	5,322	5,758
Net Derivatives, Fair Value	63	96
Asset Derivatives, Fair Value	63	96
Liability Derivatives, Fair Value	0	0
Other policyholder funds and benefits payable [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	19,646	21,927
Net Derivatives, Fair Value	(20)	(48)
Asset Derivatives, Fair Value	15	6
Liability Derivatives, Fair Value	(35)	(54)
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	1,280	1,250
Net Derivatives, Fair Value	32	67
Asset Derivatives, Fair Value	32	67
Liability Derivatives, Fair Value	$ 0	$ 0