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Acquisitions (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 02, 2019
Oct. 25, 2019
Aug. 31, 2018
Jun. 07, 2018
Nov. 30, 2019
Dec. 01, 2018
Nov. 30, 2019
Dec. 01, 2018
Jun. 01, 2019
Business Acquisition [Line Items]                  
Payments to Acquire Intangible Assets             $ 0.0 $ 4.8  
Contingent Equity Method Purchase             33.00%    
Gain on consolidation of equity method investment         $ 30.5 $ 0.0 $ 30.5 $ 0.0  
Indefinite-lived Intangible Assets Acquired             4.4    
Goodwill         $ 363.9   $ 363.9   $ 303.8
MAARS                  
Business Acquisition [Line Items]                  
Percentage of voting interests acquired     48.20%            
Purchase price     $ 6.1            
HAY                  
Business Acquisition [Line Items]                  
Percentage of voting interests acquired       33.00%          
Purchase price       $ 65.5          
Payments to Acquire Intangible Assets       $ 4.8          
HAY | Subsequent Event                  
Business Acquisition [Line Items]                  
Percentage of voting interests acquired 34.00%                
Purchase price $ 79.0                
naughtone                  
Business Acquisition [Line Items]                  
Percentage of voting interests acquired   47.50%              
Purchase price   $ 45.9              
Cash   5.1              
Working capital, net of cash and inventory step-up   1.3              
Net property and equipment   0.8              
Net assets acquired   7.2              
naughtone Equity Method Investment   20.5              
Finite and Indefinite-Lived Intangible Assets Aquired   36.4              
naughtone | North America Contract                  
Business Acquisition [Line Items]                  
Goodwill   32.7              
naughtone | International Contract                  
Business Acquisition [Line Items]                  
Goodwill   27.3              
naughtone | Tradename                  
Business Acquisition [Line Items]                  
Indefinite-lived Intangible Assets Acquired   $ 4.4              
naughtone | Inventory Step-up                  
Business Acquisition [Line Items]                  
Useful Life (years)   3 months 18 days              
Fair Value   $ 0.2              
naughtone | Backlog                  
Business Acquisition [Line Items]                  
Useful Life (years)   3 months 18 days              
Fair Value   $ 0.8              
naughtone | Customer Relationships [Member]                  
Business Acquisition [Line Items]                  
Useful Life (years)   10 years              
Fair Value   $ 31.0