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Revenue from Contracts with Customers - Revenue Disaggregated By Product Type And Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Dec. 01, 2018
Dec. 02, 2017
Dec. 01, 2018
Dec. 02, 2017
Disaggregation of Revenue [Line Items]        
Net sales $ 652.6 $ 604.6 $ 1,277.3 $ 1,184.8
North American Furniture Solutions        
Disaggregation of Revenue [Line Items]        
Net sales 353.2 330.5 696.9 659.0
North American Furniture Solutions | Systems        
Disaggregation of Revenue [Line Items]        
Net sales 143.5   288.1  
North American Furniture Solutions | Seating        
Disaggregation of Revenue [Line Items]        
Net sales 100.0   196.6  
North American Furniture Solutions | Freestanding and storage        
Disaggregation of Revenue [Line Items]        
Net sales 78.5   153.2  
North American Furniture Solutions | Other        
Disaggregation of Revenue [Line Items]        
Net sales 31.2   59.0  
ELA Furniture Solutions        
Disaggregation of Revenue [Line Items]        
Net sales 118.5 113.0 234.0 206.4
ELA Furniture Solutions | Systems        
Disaggregation of Revenue [Line Items]        
Net sales 28.4   51.1  
ELA Furniture Solutions | Seating        
Disaggregation of Revenue [Line Items]        
Net sales 62.1   130.8  
ELA Furniture Solutions | Freestanding and storage        
Disaggregation of Revenue [Line Items]        
Net sales 13.9   24.3  
ELA Furniture Solutions | Other        
Disaggregation of Revenue [Line Items]        
Net sales 14.1   27.8  
Specialty        
Disaggregation of Revenue [Line Items]        
Net sales 81.6 74.4 158.9 149.5
Specialty | Systems        
Disaggregation of Revenue [Line Items]        
Net sales 1.8   3.3  
Specialty | Seating        
Disaggregation of Revenue [Line Items]        
Net sales 26.9   55.9  
Specialty | Freestanding and storage        
Disaggregation of Revenue [Line Items]        
Net sales 19.5   32.3  
Specialty | Textiles        
Disaggregation of Revenue [Line Items]        
Net sales 4.0   9.0  
Specialty | Other        
Disaggregation of Revenue [Line Items]        
Net sales 29.4   58.4  
Consumer        
Disaggregation of Revenue [Line Items]        
Net sales 99.3 $ 86.7 187.5 $ 169.9
Consumer | Systems        
Disaggregation of Revenue [Line Items]        
Net sales 0.1   0.1  
Consumer | Seating        
Disaggregation of Revenue [Line Items]        
Net sales 58.1   111.8  
Consumer | Freestanding and storage        
Disaggregation of Revenue [Line Items]        
Net sales 16.8   34.0  
Consumer | Other        
Disaggregation of Revenue [Line Items]        
Net sales $ 24.3   $ 41.6