Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Nov. 30, 2022	Aug. 31, 2022	Nov. 30, 2021	Aug. 31, 2021
Payables and Accruals [Abstract]
Trade payables	$ 386.2	$ 401.5
Other accrued liabilities	95.4	102.8
Operating lease liabilities	$ 54.7	$ 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	$ 116.5	$ 140.4
Accrued warranty	23.7	24.0	$ 27.5	$ 27.9
Accounts payable and accrued liabilities	$ 676.5	$ 725.1