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Restructuring and Integration Expense - Additional Information (Details) - USD ($)
 3 Months Ended 12 Months Ended 45 Months Ended
Aug. 28, 2021
Aug. 29, 2020
May 29, 2021
May 30, 2020
Jun. 01, 2019
Feb. 27, 2021
Restructuring Cost and Reserve [Line Items]            
Restructuring expense $ 0 $ (1,200,000)        
Gain on disposition of assets 3,400,000          
Knoll            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0 0        
International Contract            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0 (2,800,000)        
Americas Contract            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0 1,600,000        
Global Retail            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0 0        
Knoll Integration            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 55,600,000 0        
Knoll Integration | Severance and Employee-Related            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 30,500,000          
Knoll Integration | Non-Cash Debt Extinguishment Member            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 13,400,000          
Knoll Integration | Other Restructuring            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 11,700,000          
Knoll Integration | Exit or Disposal Activities            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0          
Knoll Integration | Knoll            
Restructuring Cost and Reserve [Line Items]            
Restructuring and related cost, expected cost 100,000,000          
Restructuring expense 29,400,000 0        
Knoll Integration | International Contract            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0 0        
Knoll Integration | Americas Contract            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 1,000,000.0 0        
Knoll Integration | Global Retail            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0 $ 0        
Facilities Consolidation Plan | International Contract | Exit or Disposal Activities            
Restructuring Cost and Reserve [Line Items]            
Cost savings 3,000,000          
Restructuring costs and asset impairment charges 1,900,000   $ 1,900,000 $ 1,900,000 $ 1,900,000 $ 5,900,000
Restructuring and related cost, expected cost remaining 0          
Nemschoff Plan | Americas Contract            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 100,000          
Restructuring and related cost, expected cost remaining 0          
Restructuring expenses 3,100,000          
North American Sales and Global Product Teams Plan | Americas Contract            
Restructuring Cost and Reserve [Line Items]            
Restructuring and related cost, expected cost remaining 0          
North American Sales and Global Product Teams Plan | Global Retail            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs and asset impairment charges           $ 2,600,000
May 2020 Restructuring Plan | Severance and Employee-Related            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense 0   $ 3,400,000      
Cost savings 40,000,000          
Restructuring expenses $ 18,700,000