Investments (Details 8) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Credit Losses on Fixed Income Securities
Balance	$ (493)	$ (600)	$ (513)	$ (617)
Additional credit loss for securities previously other-than-temporarily impaired	4	(10)	(1)	(24)
Additional credit loss for securities not previously other-than-temporarily impaired	(2)	(1)	(3)	(17)
Reduction in credit loss for securities disposed or collected	7	46	33	93
Change in credit loss due to accretion of increase in cash flows	1	1	1	1
Reduction in credit loss for securities sold in LBL disposition	59		59
Balance	$ (424)	$ (564)	$ (424)	$ (564)