Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2019
Lessee Lease Description [Line Items]
Lessee, operating lease, option to extend description	Some leases include one or more options to renew, generally at our sole discretion, with renewal terms that can extend the lease term from one to five years or more.
Lessee, operating lease, existence of option to extend	true
Lessee, operating lease, option to terminate description	In addition, certain leases contain termination options, where the rights to terminate are held by either us, the lessor, or both parties.
Lessee, operating lease, existence of option to terminate	true
Rental expense for operating leases		$ 64.9
Minimum
Lessee Lease Description [Line Items]
Lessee, operating lease, renewal term	1 year
Maximum
Lessee Lease Description [Line Items]
Lessee, operating lease, renewal term	5 years