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Information on Business Segments - Additional Information (Detail) - Customer
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Number of customers accounted for greater than 10% of net sales 2 2 2
Customer Concentration Risk | Net Sales | The Home Depot, Inc.      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Percentage of net sales to major customer 13.00% 13.00% 14.00%
Customer Concentration Risk | Net Sales | Lowe's Companies, Inc      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Percentage of net sales to major customer 14.00% 14.00% 14.00%