Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition and Contracts with Customers (Company's net sales by revenue recognition method as a percentage of total net sales) (Detail)

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Revenue Recognition and Contracts with Customers (Company's net sales by revenue recognition method as a percentage of total net sales) (Detail)
9 Months Ended
Sep. 30, 2018
Revenue, Performance Obligation, Percentage 100.00%
Point in Time [Member]  
Revenue, Performance Obligation, Percentage 96.00%
Over Time - Input Method [Member]  
Revenue, Performance Obligation, Percentage 4.00%