Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Feb. 28, 2022	Nov. 30, 2021	Aug. 31, 2021	Feb. 28, 2021	Nov. 30, 2020	Aug. 31, 2020
Payables and Accruals [Abstract]
Trade payables	$ 286.3		$ 265.1
Other accrued liabilities	106.2		109.1
Operating lease liabilities	42.7		42.6
Accrued payroll and related liabilities	115.9		125.1
Accrued warranty	30.1	$ 27.5	27.9	$ 42.7	$ 45.6	$ 45.2
Accounts payable and accrued liabilities	$ 581.2		$ 569.8