Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Feb. 29, 2024	Nov. 30, 2023	Aug. 31, 2023	Feb. 28, 2023	Nov. 30, 2022	Aug. 31, 2022
Payables and Accruals [Abstract]
Trade payables	$ 303.4		$ 396.8
Accrued payroll and related liabilities	147.9		158.6
Accrued liabilities and other	97.1		87.3
Operating lease liabilities	$ 71.9		$ 72.2
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued liabilities		Accounts payable and accrued liabilities
Accrued warranty	$ 23.0	$ 24.0	$ 25.6	$ 24.5	$ 23.7	$ 24.0
Income taxes payable	6.0		3.0
Accounts payable and accrued liabilities	$ 649.3		$ 743.5