Guaranteed Benefit Features (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Insurance [Abstract]
Guaranteed minimum benefits	$ 38,000,000,000	$ 35,200,000,000
Additional liability recognized	7,100,000	108,100,000
Aggregate fair value of securities supporting separate accounts	$ 9,200,000,000	$ 9,300,000,000