Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2019
Lessee Lease Description [Line Items]
Operating lease, existence of option to terminate	true
Operating lease, option to terminate, description	some of which include renewal options, and some of which include options to terminate the leases within one year.
Operating leases commitments will commence in fiscal year amount	$ 1.7
Rent expense		$ 53.5
Minimum [Member]
Lessee Lease Description [Line Items]
Operating lease, remaining lease term	1 year
Financing lease, remaining lease term	1 year
Operating lease term of leases commencing in fiscal year 2021	3 years
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease, remaining lease term	12 years
Financing lease, remaining lease term	5 years
Operating lease term of leases commencing in fiscal year 2021	6 years