Investments (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investments
Impairment write-downs	$ (33)	$ (51)	$ (242)
Change in intent write-downs	(19)	(17)	(51)
Net other-than-temporary impairment losses recognized in earnings	(52)	(68)	(293)
Sales	114	17	823
Valuation of derivative instruments	(3)	(16)	(224)
Settlements of derivative instruments	17	51	22
EMA limited partnership income			62
Total realized capital gains and losses	76	(16)	390
Fixed income securities
Investments
Net other-than-temporary impairment losses recognized in earnings	(45)	(69)	(241)
Total realized capital gains and losses	3	(62)	539
Schedule of Available for Sale Securities
Gross gains on sales of fixed income securities	94	225	835
Gross losses on sales of fixed income securities	$ 46	$ 222	$ 124