Investments (Details 8) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Credit Losses on Fixed Income Securities
Beginning balance	$ (378)	$ (493)	$ (380)	$ (513)
Additional credit loss for securities previously other-than-temporarily impaired	(2)	4	(3)	(1)
Additional credit loss for securities not previously other-than-temporarily impaired	(2)	(2)	(6)	(3)
Reduction in credit loss for securities disposed or collected	8	7	14	33
Reduction in credit loss for securities the Company has made the decision to sell or more likely than not will be required to sell	0	0	0	0
Change in credit loss due to accretion of increase in cash flows	2	1	3	1
Ending balance	(372)	(424)	(372)	(424)
Linco in Benefit Life Company [Member]
Credit Losses on Fixed Income Securities
Reduction in credit loss for securities disposed or collected	$ 0	$ 59	$ 0	$ 59