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Revenue from Contracts with Customers - Revenue Disaggregated By Product Type And Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 01, 2018
Sep. 02, 2017
Disaggregation of Revenue [Line Items]    
Net sales $ 624.6 $ 580.3
North American Furniture Solutions    
Disaggregation of Revenue [Line Items]    
Net sales 343.7 328.6
North American Furniture Solutions | Systems    
Disaggregation of Revenue [Line Items]    
Net sales 144.5  
North American Furniture Solutions | Seating    
Disaggregation of Revenue [Line Items]    
Net sales 96.6  
North American Furniture Solutions | Freestanding and storage    
Disaggregation of Revenue [Line Items]    
Net sales 74.7  
North American Furniture Solutions | Other    
Disaggregation of Revenue [Line Items]    
Net sales 27.9  
ELA Furniture Solutions    
Disaggregation of Revenue [Line Items]    
Net sales 115.4 93.4
ELA Furniture Solutions | Systems    
Disaggregation of Revenue [Line Items]    
Net sales 22.8  
ELA Furniture Solutions | Seating    
Disaggregation of Revenue [Line Items]    
Net sales 68.7  
ELA Furniture Solutions | Freestanding and storage    
Disaggregation of Revenue [Line Items]    
Net sales 10.4  
ELA Furniture Solutions | Other    
Disaggregation of Revenue [Line Items]    
Net sales 13.5  
Specialty    
Disaggregation of Revenue [Line Items]    
Net sales 77.3 75.1
Specialty | Systems    
Disaggregation of Revenue [Line Items]    
Net sales 1.6  
Specialty | Seating    
Disaggregation of Revenue [Line Items]    
Net sales 29.0  
Specialty | Freestanding and storage    
Disaggregation of Revenue [Line Items]    
Net sales 12.9  
Specialty | Textiles    
Disaggregation of Revenue [Line Items]    
Net sales 28.8  
Specialty | Other    
Disaggregation of Revenue [Line Items]    
Net sales 5.0  
Consumer    
Disaggregation of Revenue [Line Items]    
Net sales 88.2 $ 83.2
Consumer | Seating    
Disaggregation of Revenue [Line Items]    
Net sales 53.7  
Consumer | Freestanding and storage    
Disaggregation of Revenue [Line Items]    
Net sales 17.2  
Consumer | Other    
Disaggregation of Revenue [Line Items]    
Net sales $ 17.3