Interim Financial Statements - Additional Information (Detail) - USD ($)	Nov. 30, 2021	Sep. 01, 2021	Aug. 31, 2021
Equity Class Of Treasury Stock [Line Items]
Increase in retained earnings	$ 888,700,000		$ 881,700,000
Reduction to additional paid in capital	$ (408,500,000)		$ (469,700,000)
ASU 2020-06
Equity Class Of Treasury Stock [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Sep. 01, 2021
ASU 2020-06 | Cumulative Effect Adjustment Due to Adoption
Equity Class Of Treasury Stock [Line Items]
Increase in retained earnings		$ 5,000,000
Reduction to additional paid in capital		(59,000,000)
Derecognition of deferred tax liabilities		17,000,000
Increase in convertible note due to derecognition of debt discount		$ 71
ASU 2019-12
Equity Class Of Treasury Stock [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Sep. 01, 2021