Statutory Accounting and Dividend Restrictions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Net Income Related to Statutory Accounting
Statutory Net Earnings	$ 168	$ 246	$ 256
Statutory Capital and Surplus	1,506	$ 1,681
Net assets held at domestic insurance subsidiaries	1,700
Statutory dividend payments permitted from insurance subsidiaries	$ 165