Quarterly report pursuant to Section 13 or 15(d)

Business and Credit Concentrations - Additional Information (Detail)

v3.7.0.1
Business and Credit Concentrations - Additional Information (Detail)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
Customer
Mar. 31, 2016
USD ($)
Customer
Dec. 31, 2016
USD ($)
Customer
Concentration Risk [Line Items]      
Credit losses attributable to write-offs $ 0.1 $ 4.8  
Net Sales [Member] | Customer Concentration Risk [Member]      
Concentration Risk [Line Items]      
Number of largest customers | Customer 5 5  
Percentage of concentration risk 13.20% 13.80%  
Number of customers accounting for more than 10% | Customer 0 0  
Net Trade Receivable [Member] | Credit Concentration Risk [Member]      
Concentration Risk [Line Items]      
Number of customers accounting for more than 10% | Customer 0   0
Domestic [Member]      
Concentration Risk [Line Items]      
Accounts receivable $ 274.1   $ 169.4
Non-US [Member]      
Concentration Risk [Line Items]      
Accounts receivable 328.9   199.1
Net total assets held outside the United States $ 1,140.0   $ 1,060.0