v3.26.1
Fair Value Measures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
May 31, 2026
Aug. 31, 2025
Assets:    
Nonqualified savings plan investments $ 68.7 $ 59.4
Fair Value, Measurements, Recurring    
Assets:    
Derivative financial instruments 20.5 19.0
Nonqualified savings plan investments 68.7 59.4
Cash equivalents 138.6 134.0
Assets, Fair Value Disclosure, Total 227.8 212.4
Liabilities:    
Derivative financial instruments 0.3 3.6
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring    
Assets:    
Nonqualified savings plan investments 68.7 59.4
Cash equivalents 138.6 134.0
Assets, Fair Value Disclosure, Total 207.3 193.4
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Assets:    
Derivative financial instruments [1] 20.5 19.0
Assets, Fair Value Disclosure, Total [1] 20.5 19.0
Liabilities:    
Derivative financial instruments [1] $ 0.3 $ 3.6
[1] Level 2 assets and liabilities include derivative financial instruments that are valued based on observable inputs. See Note 11 - Derivative Instruments to the Condensed Consolidated Financial Statements for further discussion.