v3.26.3
Pension and Defined Contribution Plans - Fair Value Measurements and Benefit Payments (Details) - Pension Plan - USD ($)
$ in Millions
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2024
UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value $ 25.3 $ 26.4 $ 134.5
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]      
2027 4.0    
2028 6.8    
2029 5.9    
2030 4.7    
2031 4.8    
2032-2036 24.6    
UNITED STATES | Level 1,2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 21.7 22.6  
UNITED STATES | Level 1,2 and 3 | Fixed-income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 10.4 10.9  
UNITED STATES | Level 1,2 and 3 | U.S. Treasury investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 9.7 5.2  
UNITED STATES | Level 1,2 and 3 | Mutual Fund      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 1.2 3.1  
UNITED STATES | Level 1,2 and 3 | Collective trust: Domestic small cap equities      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.1 0.6  
UNITED STATES | Level 1,2 and 3 | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.3 2.8  
UNITED STATES | Level 1 | Fixed-income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 1 | U.S. Treasury investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 1 | Mutual Fund      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 1.2 3.1  
UNITED STATES | Level 1 | Collective trust: Domestic small cap equities      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 1 | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.3 2.8  
UNITED STATES | Level 2 | Fixed-income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 10.4 10.9  
UNITED STATES | Level 2 | U.S. Treasury investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 9.7 5.2  
UNITED STATES | Level 2 | Mutual Fund      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 2 | Collective trust: Domestic small cap equities      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.1 0.6  
UNITED STATES | Level 2 | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 3 | Fixed-income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 3 | U.S. Treasury investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 3 | Mutual Fund      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 3 | Collective trust: Domestic small cap equities      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | Level 3 | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
UNITED STATES | NAV      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 3.6 3.8  
UNITED STATES | NAV | Real estate fund      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 3.6 3.8  
International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 27.0 28.9 $ 34.6
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]      
2027 2.1    
2028 2.2    
2029 2.4    
2030 2.6    
2031 2.8    
2032-2036 18.5    
International Plans | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.4 0.1  
International Plans | Insurance policy      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 26.6 28.8  
International Plans | Level 1 | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.4 0.1  
International Plans | Level 1 | Insurance policy      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
International Plans | Level 2 | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
International Plans | Level 2 | Insurance policy      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
International Plans | Level 3 | Short-term fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value 0.0 0.0  
International Plans | Level 3 | Insurance policy      
Defined Benefit Plan Disclosure [Line Items]      
Total assets at fair value $ 26.6 $ 28.8