Derivative Instruments - Effect of Derivative Instruments on Statements of Operations (Detail) - Cash Flow Hedging - USD ($)	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI on derivatives	$ (4,200,000)	$ (700,000)
Gain (loss) reclassified from accumulated OCI into income	(1,500,000)	(1,600,000)
Gain (loss) recognized on derivative (amount excluded from effectiveness testing)	300,000	100,000
Foreign Exchange Forward | Interest and Foreign Exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income on derivatives	(300,000)	(100,000)
Foreign Exchange Forward | Sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI on derivatives	(4,600,000)	(1,000,000.0)
Gain (loss) reclassified from accumulated OCI into income	(200,000)	(300,000)
Gain (loss) recognized on derivative (amount excluded from effectiveness testing)	200,000	100,000
Foreign Exchange Forward | Cost Of Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI on derivatives	(1,300,000)
Gain (loss) recognized on derivative (amount excluded from effectiveness testing)	100,000
Interest rate swap contracts | Interest and Foreign Exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI on derivatives	1,700,000	300,000
Gain (loss) reclassified from accumulated OCI into income	$ (1,300,000)	$ (1,300,000)