Quarterly report pursuant to Section 13 or 15(d)

Leases (Narrative) (Details)

v3.20.1
Leases (Narrative) (Details)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 29, 2020
USD ($)
item
Feb. 29, 2020
USD ($)
item
May 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]      
Fixed payment operating lease expense | $ $ 9.7 $ 29.4 $ 42.9
Number of lease agreements, not yet commenced | item 0 0  
Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Operating leases, remaining term of contract 1 year 1 year  
Operating leases, contractual term   2020  
Operating leases, renewal term 1 year 1 year  
Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Operating leases, remaining term of contract 9 years 9 years  
Operating leases, contractual term   2029  
Operating leases, renewal term 5 years 5 years