v3.25.2
Fair Value Measurements - Narrative (Details)
$ in Millions
9 Months Ended
May 31, 2025
USD ($)
asset
May 31, 2024
USD ($)
Aug. 31, 2024
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impairment charge $ 14.7    
Asset impairments 16.7 $ 0.0  
2.150% Senior Unsecured Notes Due December 2030 | Estimate of Fair Value Measurement | Unsecured Debt      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying and estimated fair values of financial instruments 433.0   $ 429.7
Credit Agreement | Line of Credit      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Carrying and estimated fair values of financial instruments 500.0   $ 0.0
Disposal Group, Held-for-Sale, Not Discontinued Operations      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Disposal group, including discontinued operation, property, plant and equipment (excluding impairment) $ 5.5    
Disposal Group, Held-for-Sale, Not Discontinued Operations | Property, Plant and Equipment      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Disposal group, including discontinued operation, number of assets | asset 1    
Disposal group, including discontinued operation, assets $ 7.5    
Asset impairments $ 2.0