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Income Taxes (Details) - Unrecognized Tax Benefits - USD ($)
$ in Millions
 8 Months Ended 10 Months Ended 12 Months Ended
Dec. 31, 2013
Oct. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Income Tax Examination [Line Items]        
Reductions due to closed statutes     $ (10.0)  
Unrecognized tax benefits, ending balance     112.0  
Successor [Member]        
Income Tax Examination [Line Items]        
Unrecognized tax benefits, beginning balance $ 0.0   27.7 $ 25.6
Additions based on current year tax positions 0.3   20.7 1.7
Additions based upon prior year tax positions (including acquired uncertain tax positions) 26.3   72.2 7.4
Reductions due to closed statutes (1.0)   (2.9) (6.7)
Reductions for settlements and payments 0.0   (5.5) (0.3)
Unrecognized tax benefits, ending balance $ 25.6   $ 112.2 $ 27.7
Predecessor [Member]        
Income Tax Examination [Line Items]        
Unrecognized tax benefits, beginning balance   $ 22.7    
Additions based on current year tax positions   0.8    
Additions based upon prior year tax positions (including acquired uncertain tax positions)   0.3    
Reductions due to closed statutes   (0.3)    
Reductions for settlements and payments   0.0    
Unrecognized tax benefits, ending balance   $ 23.5