Leases - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019
Lessee Lease Description [Line Items]
Existence of option to terminate	true
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 future amount	$ 142.5
Rent expense		$ 53.5
Minimum [Member]
Lessee Lease Description [Line Items]
Remaining lease term	1 year
Operating lease term of leases commencing between fiscal years 2019 and 2020	3 years
Maximum [Member]
Lessee Lease Description [Line Items]
Remaining lease term	10 years
Operating lease term of leases commencing between fiscal years 2019 and 2020	12 years