Segment Information - Summary of Geographic Information (Detail) - USD ($) $ in Millions		12 Months Ended
		Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue		$ 3,944.0	$ 2,977.7	$ 1,747.9
Assets		3,978.4	3,851.5	3,390.7
U.S.
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	[1]	3,235.3	2,452.1	1,221.4
Assets		2,593.4	2,689.6	2,506.1
Foreign
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	[1]	708.7	525.6	526.5
Mexico
Segment Reporting, Revenue Reconciling Item [Line Items]
Assets		1,084.3	948.4	656.6
Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Assets		$ 300.7	$ 213.5	$ 228.0

[1] Revenue is presented on the basis of geographic location of customers.