Annual report pursuant to Section 13 and 15(d)

Leases (Narrative) (Details)

v3.20.2
Leases (Narrative) (Details)
$ in Millions
12 Months Ended
May 31, 2020
USD ($)
agreement
May 31, 2019
USD ($)
May 31, 2018
USD ($)
Lessee, Lease, Description [Line Items]      
Fixed payment operating lease expense $ 38.2 $ 42.9 $ 39.9
Lease incentives received in the form of tenant allowances and free rent $ 6.1 $ 3.5 $ 7.7
Number of lease agreements, not yet commenced | agreement 2    
Lease not yet commenced, term of contract 10 years    
Lease payments, not yet commenced $ 6.8    
Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Operating leases, remaining term of contract 1 year    
Operating leases, contractual term 2020    
Operating leases, renewal term 1 year    
Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Operating leases, remaining term of contract 10 years    
Operating leases, contractual term 2030    
Operating leases, renewal term 5 years