Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Significant Accounting Policies - Summary of Impact on Condensed Consolidated Statement of Income due to Adoption of Topic 606 (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]    
Net sales $ 1,176.9 $ 1,102.1
Cost of sales 239.9 204.6
Gross profit 937.0 897.5
Royalty overrides 337.3 315.1
Selling, general, and administrative expenses 460.1 438.6
Other operating income (16.2)  
Operating income 155.8 143.8
Interest expense, net 39.9 30.2
Other expense, net 24.4 0.0
Income before income taxes 91.5 113.6
Income taxes 9.4 28.4
Net income 82.1 $ 85.2
Accounting Standards Update 2014-09 [Member]    
Revenue Initial Application Period Cumulative Effect Transition [Line Items]    
Net sales 1,176.9  
Cost of sales 239.9  
Gross profit 937.0  
Royalty overrides 337.3  
Selling, general, and administrative expenses 460.1  
Other operating income (16.2)  
Operating income 155.8  
Interest expense, net 39.9  
Other expense, net 24.4  
Income before income taxes 91.5  
Income taxes 9.4  
Net income 82.1  
Accounting Standards Update 2014-09 [Member] | Impact due to ASC 606 [Member]    
Revenue Initial Application Period Cumulative Effect Transition [Line Items]    
Net sales (8.0)  
Cost of sales (0.5)  
Gross profit (7.5)  
Royalty overrides (1.2)  
Selling, general, and administrative expenses (5.6)  
Operating income (0.7)  
Income before income taxes (0.7)  
Income taxes (0.1)  
Net income (0.6)  
Accounting Standards Update 2014-09 [Member] | Without Adoption of Topic 606 [Member]    
Revenue Initial Application Period Cumulative Effect Transition [Line Items]    
Net sales 1,168.9  
Cost of sales 239.4  
Gross profit 929.5  
Royalty overrides 336.1  
Selling, general, and administrative expenses 454.5  
Other operating income (16.2)  
Operating income 155.1  
Interest expense, net 39.9  
Other expense, net 24.4  
Income before income taxes 90.8  
Income taxes 9.3  
Net income $ 81.5