Quarterly report pursuant to Section 13 or 15(d)

Business and Credit Concentrations - Additional Information (Detail)

v3.10.0.1
Business and Credit Concentrations - Additional Information (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Customer
Jun. 30, 2017
USD ($)
Customer
Jun. 30, 2018
USD ($)
Customer
Jun. 30, 2017
USD ($)
Customer
Dec. 31, 2017
USD ($)
Concentration Risk [Line Items]          
Credit losses attributable to write-offs $ 2.2 $ 2.1 $ 4.3 $ 4.6  
Net Sales [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Number of largest customers | Customer 5 5 5 5  
Percentage of concentration risk 11.20% 14.00% 10.50% 13.40%  
Number of customers accounting for more than 10% | Customer 0 0 0 0  
Domestic [Member]          
Concentration Risk [Line Items]          
Accounts receivable $ 258.2   $ 258.2   $ 206.1
Non-US [Member]          
Concentration Risk [Line Items]          
Accounts receivable 313.4   313.4   251.0
Net total assets held outside the United States $ 1,381.0   $ 1,381.0   $ 1,273.0