Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Summary of Impact on Condensed Consolidated Balance Sheet due to Adoption of Topic 606 (Detail)

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Significant Accounting Policies - Summary of Impact on Condensed Consolidated Balance Sheet due to Adoption of Topic 606 (Detail) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Assets:    
Receivables, net of allowance for doubtful accounts $ 103.3 $ 93.3
Inventories 333.0 341.2
Total assets 2,968.7 2,895.1
Liabilities:    
Royalty overrides 264.7 277.7
Total liabilities 3,187.7 3,229.8
Shareholders’ deficit:    
Accumulated deficit (168.3) (248.1)
Total shareholders’ deficit (219.0) (334.7)
Total liabilities and shareholders’ deficit 2,968.7 $ 2,895.1
Accounting Standards Update 2014-09 [Member]    
Assets:    
Receivables, net of allowance for doubtful accounts 103.3  
Inventories 333.0  
Total assets 2,968.7  
Liabilities:    
Royalty overrides 264.7  
Total liabilities 3,187.7  
Shareholders’ deficit:    
Accumulated deficit (168.3)  
Total shareholders’ deficit (219.0)  
Total liabilities and shareholders’ deficit 2,968.7  
Accounting Standards Update 2014-09 [Member] | Impact due to ASC 606 [Member]    
Assets:    
Receivables, net of allowance for doubtful accounts 4.8  
Inventories (0.9)  
Total assets 3.9  
Liabilities:    
Royalty overrides 2.3  
Total liabilities 2.3  
Shareholders’ deficit:    
Accumulated deficit 1.6  
Total shareholders’ deficit 1.6  
Total liabilities and shareholders’ deficit 3.9  
Accounting Standards Update 2014-09 [Member] | Without Adoption of Topic 606 [Member]    
Assets:    
Receivables, net of allowance for doubtful accounts 108.1  
Inventories 332.1  
Total assets 2,972.6  
Liabilities:    
Royalty overrides 267.0  
Total liabilities 3,190.0  
Shareholders’ deficit:    
Accumulated deficit (166.7)  
Total shareholders’ deficit (217.4)  
Total liabilities and shareholders’ deficit $ 2,972.6