Investments and Derivative Instruments (Details 12) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
GMWB reinsurance contracts
Derivative, Notional Amount	$ 159,686	$ 170,851	$ 170,851
Fair Value	(1,481)	(1,548)
UNITED STATES | GMWB hedging instruments [Member]
GMWB reinsurance contracts
Derivative, Notional Amount	15,424	18,691
Fair Value	101	41
UNITED STATES | GMWB Hedging Instruments [Member] | Interest Rate Swaps and Futures [Member]
GMWB reinsurance contracts
Derivative, Notional Amount	3,975	6,615
Fair Value	(2)	(77)
UNITED STATES | GMWB Hedging Instruments [Member] | Equity Swaps, Options and Futures [Member]
GMWB reinsurance contracts
Derivative, Notional Amount	3,888	4,237
Fair Value	32	44
UNITED STATES | GMWB Hedging Instruments [Member] | Customized Swaps [Member]
GMWB reinsurance contracts
Derivative, Notional Amount	7,561	7,839
Fair Value	71	74
UNITED STATES | Macro Hedge Program [Member]
GMWB reinsurance contracts
Derivative, Notional Amount	7,596	9,934
Fair Value	133	139
UNITED STATES | Macro Hedge Program [Member] | Equity Options [Member]
GMWB reinsurance contracts
Derivative, Notional Amount	7,596	9,934
Fair Value	$ 133	$ 139