Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	May 31, 2022	Feb. 28, 2022	Aug. 31, 2021	May 31, 2021	Feb. 28, 2021	Aug. 31, 2020
Payables and Accruals [Abstract]
Trade payables	$ 327.6		$ 265.1
Other accrued liabilities	116.0		109.1
Operating lease liabilities	41.7		42.6
Accrued payroll and related liabilities	125.2		125.1
Accrued warranty	28.5	$ 30.1	27.9	$ 31.6	$ 42.7	$ 45.2
Accounts payable and accrued liabilities	$ 639.0		$ 569.8