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Supplementary Financial Statement Information - Other Non-current Assets (Details 6) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Other Assets, Noncurrent [Abstract]        
Investment in AFSG Holdings, Inc. $ 0.0 $ 0.0 $ 55.6  
Goodwill 32.8 32.8 32.8  
Deferred tax assets, non-current 62.7 62.7 138.0  
Other Assets, Miscellaneous, Noncurrent 25.5 25.5 41.7  
Other non-current assets $ 121.0 121.0 268.1  
Impairment of AFSG investment   $ 41.6 $ 0.0 $ 0.0
AFSG Holdings Inc [Member]        
Investment [Line Items]        
Impairment Effect on Earnings Per Share, Pretax $ 0.23      
Other Assets, Noncurrent [Abstract]        
Impairment of AFSG investment $ 41.6