Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	May 31, 2024	Feb. 29, 2024	Aug. 31, 2023	May 31, 2023	Feb. 28, 2023	Aug. 31, 2022
Payables and Accruals [Abstract]
Trade payables	$ 314.1		$ 396.8
Accrued payroll and related liabilities	152.9		158.6
Accrued liabilities and other	91.2		87.3
Operating lease liabilities	$ 68.9		$ 72.2
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued liabilities		Accounts payable and accrued liabilities
Accrued warranty	$ 21.5	$ 23.0	$ 25.6	$ 25.4	$ 24.5	$ 24.0
Income taxes payable	4.3		3.0
Accounts payable and accrued liabilities	$ 652.9		$ 743.5