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Acquisitions and Divestitures - Narrative (Details)
12 Months Ended
Mar. 21, 2017
USD ($)
$ / shares
May 31, 2018
segment_business
May 31, 2017
segment_business
May 31, 2015
transaction
buyer
Business Acquisition [Line Items]        
Number of transactions involved in sale of business | transaction       3
Number of buyers involved in sale of business | buyer       3
Series of Business Acquisitions | Uniform Rental and Facility Services        
Business Acquisition [Line Items]        
Number of businesses acquired | segment_business   5 3  
Series of Business Acquisitions | First Aid and Safety Services        
Business Acquisition [Line Items]        
Number of businesses acquired | segment_business   3 4  
Series of Business Acquisitions | All Other        
Business Acquisition [Line Items]        
Number of businesses acquired | segment_business   6 11  
G & K Services        
Business Acquisition [Line Items]        
Consideration transferred $ 2,112,811,000      
Share price of acquisition (in dollars per share) | $ / shares $ 97.50      
Net consideration transferred $ 2,078,418,000      
Goodwill deductible for tax purposes 0      
Cash consideration $ 1,901,845,000      
G & K Services | Service contracts        
Business Acquisition [Line Items]        
Amortization Period (in years)   15 years    
G & K Services | Level 3 | Measurement Input, Discount Rate        
Business Acquisition [Line Items]        
Discount rate (as a percent) 0.095      
G & K Services | Real Property        
Business Acquisition [Line Items]        
Fair value of property plant and equipment $ 141,800,000      
G & K Services | Personal Property        
Business Acquisition [Line Items]        
Fair value of property plant and equipment $ 111,500,000