Investments and Derivative Instruments (Details 11) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
GMWB reinsurance contracts
Notional amount	$ 141,307	$ 159,441
Fair Value	(591)	(737)
UNITED STATES | GMWB hedging instruments [Member]
GMWB reinsurance contracts
Notional amount	15,424	18,691
Fair Value	101	41
UNITED STATES | Macro Hedge Program [Member]
GMWB reinsurance contracts
Notional amount	7,596	9,934
Fair Value	133	139
UNITED STATES | Macro Hedge Program [Member] | Stock Option [Member]
GMWB reinsurance contracts
Notional amount	7,596	9,934
Fair Value	133	139
UNITED STATES | Customized swaps [Member] | GMWB hedging instruments [Member]
GMWB reinsurance contracts
Notional amount	7,561	7,839
Fair Value	71	74
UNITED STATES | Equity swaps, options and futures [Member] | GMWB hedging instruments [Member]
GMWB reinsurance contracts
Notional amount	3,888	4,237
Fair Value	32	44
UNITED STATES | Interest rate swaps and futures [Member] | GMWB hedging instruments [Member]
GMWB reinsurance contracts
Notional amount	3,975	6,615
Fair Value	$ (2)	$ (77)