Separate Accounts, Death Benefits and Other Insurance Benefit Features and Embedded Product Derivatives Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Insurance [Abstract]
Assets supporting fixed indexed annuities, fair value	$ 2,000,000,000	$ 1,800,000,000
Decrease in separate account assets and liabilities	464,200,000
Age of oldest original owner	81 years
Fixed annuity benefit, percentage of premiums paid	200.00%
Derivative asset			3,500,000
Fair value of embedded derivatives	78,900,000	51,200,000
Embedded derivatives gains and (losses) recognized in earnings	$ 17,600,000	$ 11,200,000