Annual report pursuant to Section 13 and 15(d)

Segment Information - Additional Information (Detail)

v3.8.0.1
Segment Information - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
Segment
Country
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Segment Reporting Information [Line Items]        
Number of countries in which the Company sells products | Country 94      
Number of reportable segments | Segment 2      
Goodwill allocated to the Company's Segment $ 96.9 $ 89.9    
Cash and cash equivalents 1,278.8 844.0 $ 889.8 $ 645.4
Total amount of cash held by foreign subsidiaries maintained or invested in U.S. dollars 633.3 28.2    
Primary Reporting Segment [Member]        
Segment Reporting Information [Line Items]        
Goodwill allocated to the Company's Segment 93.6 86.8    
China [Member]        
Segment Reporting Information [Line Items]        
Goodwill allocated to the Company's Segment 3.3 3.1    
Foreign countries [Member]        
Segment Reporting Information [Line Items]        
Cash and cash equivalents 1,133.5 316.2    
United States [Member]        
Segment Reporting Information [Line Items]        
Cash and cash equivalents $ 145.3 $ 527.8