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 6 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
Customer
Jun. 30, 2016
USD ($)
Customer
Jun. 30, 2017
USD ($)
Customer
Jun. 30, 2016
USD ($)
Customer
Dec. 31, 2016
USD ($)
Customer
Concentration Risk [Line Items]          
Credit losses attributable to write-offs $ 2.1 $ 1.5 $ 4.6 $ 4.0  
Net Sales [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Number of largest customers | Customer 5 5 5 5  
Percentage of concentration risk 14.00% 11.80% 13.40% 12.70%  
Number of customers accounting for more than 10% | Customer 0 0 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 $ 271.5   $ 271.5   $ 169.4
Non-US [Member]          
Concentration Risk [Line Items]          
Accounts receivable 272.3   272.3   199.1
Net total assets held outside the United States $ 1,235.0   $ 1,235.0   $ 1,060.0