Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Equity
Assumptions for net periodic benefit cost:
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		50.00%
Fixed Income Securities
Assumptions for net periodic benefit cost:
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		50.00%
Domestic Plan Member
Assumptions for benefit obligations:
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.40%	4.75%	2.55%
Assumptions for net periodic benefit cost:
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.75%	2.55%	2.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.70%	5.45%	4.20%
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	$ 0.0	$ 0.0