v3.26.3
Fair Value Measures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
Aug. 31, 2026
Aug. 31, 2025
Assets:    
Nonqualified savings plan investments $ 68.7 $ 59.4
Fair Value, Measurements, Recurring    
Assets:    
Derivative financial instruments 18.3 19.0
Nonqualified savings plan investments 68.7 59.4
Cash equivalents 94.4 134.0
Assets, Fair Value Disclosure, Total 181.4 212.4
Liabilities:    
Derivative financial instruments 0.6 3.6
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring    
Assets:    
Nonqualified savings plan investments 68.7 59.4
Cash equivalents 94.4 134.0
Assets, Fair Value Disclosure, Total 163.1 193.4
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring    
Assets:    
Derivative financial instruments [1] 18.3 19.0
Assets, Fair Value Disclosure, Total [1] 18.3 19.0
Liabilities:    
Derivative financial instruments [1] $ 0.6 $ 3.6
[1] Level 2 assets include derivative financial instruments which are valued based on significant observable inputs. See Note 11 - Derivative Instruments to the Consolidated Financial Statements for further discussion.