XML 85 R47.htm IDEA: XBRL DOCUMENT v3.3.1.900
Summary of Significant Accounting Policies - Marketable Securities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accounting Policies [Abstract]      
Percentage of ownership in Swiss franchise 49.00%    
Swiss franchise investment portfolio market value $ 202.3 $ 200.9  
Swiss franchise realized gains 2.3 2.5 $ 3.6
Swiss franchise realized losses 1.1 0.5 1.4
Other-than-temporary impairment (gain) loss $ (0.2) $ 0.1 $ (0.9)