Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Narrative) (Details)

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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2018
May 31, 2017
May 31, 2016
Commitments and Contingencies [Abstract]      
Other current liabilities related to termination of license agreements $ 34.8    
Cost related to termination of license agreements, net of tax 24.7    
Cost to acquire rights to client lists 30.0    
Rent expense 39.9 $ 39.7 $ 39.8
Minimum future payment obligations under purchase orders and legally binding contractual arrangements 130.2    
Commitments to purchase capital assets $ 6.7