Annual report pursuant to Section 13 and 15(d)

Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Detail)

v3.22.2.2
Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Detail) - USD ($)
$ in Millions
 12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Assumptions for net periodic benefit cost:      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment     $ (1.7)
Equity      
Assumptions for net periodic benefit cost:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 30.00%    
Fixed Income Securities      
Assumptions for net periodic benefit cost:      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 70.00%    
Domestic Plan Member      
Assumptions for benefit obligations:      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 4.75% 2.55% 2.40%
Assumptions for net periodic benefit cost:      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 2.55% 2.40% 2.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 5.45% 4.20% 4.60%