XML 133 R120.htm IDEA: XBRL DOCUMENT v3.8.0.1
Quarterly Financial Information (Unaudited) - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Effect of Fourth Quarter Events [Line Items]                        
Net income (loss)   $ 214.3 $ 12.8 $ (27.6) $ (39.2) $ (13.2) $ 3.0 $ (8.0) $ (1.5) $ 160.3 $ (19.7) $ 111.3
Impairment of intangible assets, finite-lived       $ 29.3                
Senior Secured Second Priority Notes                        
Effect of Fourth Quarter Events [Line Items]                        
Loss on early extinguishment on debt $ 11.4                      
Senior Secured Second Priority Notes | 2022 Notes                        
Effect of Fourth Quarter Events [Line Items]                        
Principal amount redeemed 122.0 123.5     122.0         $ 123.5    
Senior Secured Second Priority Notes | 2024 Notes                        
Effect of Fourth Quarter Events [Line Items]                        
Principal amount redeemed $ 125.0       125.0              
Loss on early extinguishment on debt   $ 5.6     $ 5.8