Quarterly report pursuant to Section 13 or 15(d)

Business and Credit Concentrations - Additional Information (Detail)

v3.20.2
Business and Credit Concentrations - Additional Information (Detail)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Customer
Jun. 30, 2019
USD ($)
Customer
Jun. 30, 2020
USD ($)
Customer
Jun. 30, 2019
USD ($)
Customer
Dec. 31, 2019
USD ($)
Concentration Risk [Line Items]          
Credit losses attributable to write-offs $ 1.3 $ 0.9 $ 2.8 $ 3.1  
Sales [Member] | Customer Concentration Risk [Member]          
Concentration Risk [Line Items]          
Number of largest customers | Customer 5 5 5 5  
Percentage of concentration risk 8.60% 9.60% 9.20% 10.10%  
Domestic [Member]          
Concentration Risk [Line Items]          
Accounts receivable $ 139.3   $ 139.3   $ 228.5
Non-US [Member]          
Concentration Risk [Line Items]          
Accounts receivable 376.4   376.4   440.9
Net total assets held outside the United States $ 2,784.8   $ 2,784.8   $ 2,643.8