Business, Basis of Presentation and Significant Accounting Policies - Assumptions and Yields (Details)	12 Months Ended				12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Variable products	Dec. 31, 2012 Future Policy Benefits and Claims Reserves	Dec. 31, 2012 Investment contract
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Long-term equity return assumption			9.00%
Long-term equity return assumption, cap			14.00%
Lookforward period			5 years
Interest rate used to calculate present value of future benefits, low end				3.00%
Interest rate used to calculate present value of future benefits, high end				8.00%
Credited interest rate maximum on fixed annuities and payout contracts without life contingencies	6.50%	6.50%			6.50%