Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	May 31, 2023	Feb. 28, 2023	Aug. 31, 2022	May 31, 2022	Feb. 28, 2022	Aug. 31, 2021
Payables and Accruals [Abstract]
Trade payables	$ 400.6		$ 401.5
Accrued liabilities and other	96.7		102.8
Operating lease liabilities	$ 75.9		$ 56.4
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued liabilities		Accounts payable and accrued liabilities
Accrued payroll and related liabilities	$ 143.0		$ 140.4
Accrued warranty	25.4	$ 24.5	24.0	$ 28.5	$ 30.1	$ 27.9
Accounts payable and accrued liabilities	$ 741.6		$ 725.1