Postretirement and Other Employee Benefits (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan, Type [Extensible Enumeration]	Pension Plan [Member]
Service period	30 days
Company contributions	$ 56	$ 56	$ 49
Minimum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions expected to funded pension plans during fiscal year 2021	24
Maximum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions expected to funded pension plans during fiscal year 2021	$ 30
Global equity securities | Minimum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target allocation percentage (as a percent)	35.00%
Global equity securities | Maximum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target allocation percentage (as a percent)	45.00%
Debt securities | Minimum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target allocation percentage (as a percent)	55.00%
Debt securities | Maximum
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