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Postretirement and Other Employee Benefits (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Pension and Other Postretirement Benefits Disclosure [Line Items]
Company contributions	$ 56.1	$ 49.0	$ 40.5
Minimum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions expected to funded pension plans during fiscal year 2021	21.7
Maximum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions expected to funded pension plans during fiscal year 2021	$ 26.6
Global equity securities
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target allocation percentage (as a percent)	35.00%
Debt securities
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target allocation percentage (as a percent)	65.00%
Foreign Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service period	3 years
Foreign Plan | Switzerland Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Service period	8 years

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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