Investments and Derivative Instruments (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Results of variable annuity hedge program [Line Items]
Document Period End Date	Mar. 31, 2013
Net realized capital gains (losses)
Gross gains on sales	$ 1,719		$ 259
Gross losses on sales	(82)		(97)
Net OTTI losses recognized in earnings	(21)		(29)
Valuation allowances on mortgage loans	0		1
Japanese fixed annuity contract hedges, net	3	[1]	(20)	[1]
Periodic net coupon settlements on credit derivatives/Japan	(6)		(5)
Total results of variable annuity hedge program	(230)		(1,223)
Other, net	212	[2]	204	[2]
Net realized capital gains (losses)	1,595		(910)
U.S. [Member]
Net realized capital gains (losses)
Results of variable annuity hedge program	(38)		(4)
U.S. [Member] | GMWB derivatives, net [Member]
Net realized capital gains (losses)
Results of variable annuity hedge program	47		185
U.S. [Member] | Macro Hedge Program [Member]
Net realized capital gains (losses)
Results of variable annuity hedge program	(85)		(189)
International [Member]
Net realized capital gains (losses)
Results of variable annuity hedge program	$ (192)		$ (1,219)

[1] Relates to the Japanese fixed annuity product (adjustment of product liability for changes in spot currency exchange rates, related derivative hedging instruments, excluding net period coupon settlements, and Japan FVO securities).

[2]