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Revenue - Disaggregation of Revenue (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Net sales $ 1,771.0 $ 1,402.7
Wholesalers [Member]    
Disaggregation of Revenue [Line Items]    
Net sales [1] 798.0 654.2
Home Center retailers [Member]    
Disaggregation of Revenue [Line Items]    
Net sales [2] 548.9 419.2
Other retailers [Member]    
Disaggregation of Revenue [Line Items]    
Net sales [3] 99.1 82.6
Builder direct [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 61.4 54.7
United States [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 1,507.4 1,210.7
International [Member]    
Disaggregation of Revenue [Line Items]    
Net sales [4] $ 263.6 $ 192.0
[1] Represents sales to customers whose business is oriented towards builders, professional trades and home remodelers, inclusive of sales through our customers’ respective internet website portals.
[2] Represents sales to the three largest “Do-It-Yourself” retailers; The Home Depot, Inc., Lowes Companies, Inc. and Menards, Inc., inclusive of sales through their respective internet website portals.
[3] Represents sales principally to our mass merchant and standalone independent e-commerce customers.
[4] Represents sales in markets outside the United States, principally in Canada, China, Europe and Mexico.