Investments (Details 5) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Investments
Impairment write-downs	$ 10	$ (18)	$ (12)	$ (61)
Change in intent write-downs	(63)	(70)	(167)	(124)
Net other-than-temporary impairment losses recognized in earnings	(53)	(88)	(179)	(185)
Sales	355	59	792	639
Valuation and settlements of derivative instruments	(8)	(12)	(25)	(2)
Total realized capital gains and losses	294	(41)	588	452
Fixed income and equity securities
Schedule of Available for Sale Securities
Gross gains on sales of fixed income securities	353	109	866	760
Gross loss on sales of fixed income securities	$ 48	$ 58	$ 111	$ 142