Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Summary of Impact on Consolidated Balance Sheet due to Adoption of Topic 606 (Detail)

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Basis of Presentation - Summary of Impact on Consolidated Balance Sheet due to Adoption of Topic 606 (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Assets:        
Receivables, net of allowance for doubtful accounts $ 70.5 $ 93.3    
Inventories 381.8 341.2    
Total assets 2,789.8 2,895.1    
Liabilities:        
Royalty overrides 281.4 277.7    
Total liabilities 3,513.2 3,229.8    
Shareholders’ deficit:        
Accumulated deficit (526.3) (248.1)    
Total shareholders’ deficit (723.4) (334.7) $ 196.3 $ (53.5)
Total liabilities and shareholders’ deficit 2,789.8 $ 2,895.1    
Impact due to ASC 606 [Member] | Accounting Standards Update 2014-09 [Member]        
Assets:        
Receivables, net of allowance for doubtful accounts 5.4      
Inventories (1.0)      
Total assets 4.4      
Liabilities:        
Royalty overrides 2.5      
Total liabilities 2.5      
Shareholders’ deficit:        
Accumulated deficit 1.9      
Total shareholders’ deficit 1.9      
Total liabilities and shareholders’ deficit 4.4      
Without Adoption of Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]        
Assets:        
Receivables, net of allowance for doubtful accounts 75.9      
Inventories 380.8      
Total assets 2,794.2      
Liabilities:        
Royalty overrides 283.9      
Total liabilities 3,515.7      
Shareholders’ deficit:        
Accumulated deficit (524.4)      
Total shareholders’ deficit (721.5)      
Total liabilities and shareholders’ deficit $ 2,794.2