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Acquisitions - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 29, 2021
Aug. 03, 2020
Jan. 17, 2020
Jun. 26, 2021
Mar. 27, 2021
Hart & Cooley Flexible Duct Business [Member]          
Business Acquisition [Line Items]          
Consideration transferred net of working capital adjustments $ 15.4        
Cash portion of acquisition price 14.0        
Payment for contingent consideration 1.4        
Fair value of assets acquired 15.3        
Fair value of property, plant and equipment acquired 10.8        
Fair value of inventories acquired 4.5        
Tax-deductible goodwill $ 0.1        
Increase (decrease) in property plant and equipment       $ 2.4  
Increase (decrease) in goodwill       1.0  
Recognition of contingent consideration       1.4  
Wieland-Kessler LLC [Member]          
Business Acquisition [Line Items]          
Consideration transferred net of working capital adjustments   $ 57.2      
Fair value of assets acquired   27.3      
Tax-deductible goodwill   $ 29.9      
Increase (decrease) in property plant and equipment       (1.4)  
Increase (decrease) in goodwill       $ 1.4 $ (1.5)
Increase in intangible assets         $ 1.5
Shoals Tubular, Inc. [Member]          
Business Acquisition [Line Items]          
Consideration transferred net of working capital adjustments     $ 15.3    
Cash portion of acquisition price     15.3    
Fair value of assets acquired     6.2    
Fair value of property, plant and equipment acquired     3.7    
Fair value of inventories acquired     1.8    
Tax-deductible goodwill     9.3    
Fair value of accounts receivable acquired     0.7    
Fair value of liabilities acquired     $ 0.2