Postretirement and Other Employee Benefits (Additional Information) (Details) $ in Millions	3 Months Ended
	Nov. 30, 2019 USD ($)
Foreign Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service period	8 years
Switzerland Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service period	8 years
Switzerland Plan | Minimum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Expected cash contributions	$ 9.5
Switzerland Plan | Maximum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Expected cash contributions	$ 11.7