Separate Accounts, Death Benefits and Other Insurance Benefit Features and Embedded Product Derivatives - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Insurance [Abstract]
Assets fair value and carrying amount	$ 2,400,000,000		$ 2,400,000,000		$ 2,000,000,000
Fair value of embedded derivatives	115,000,000		115,000,000		78,900,000
Embedded derivatives gains and (losses) recognized in earnings	$ (5,600,000)	$ 8,400,000	$ (17,700,000)	$ 13,700,000