v3.26.3
Pension and Defined Contribution Plans - Domestic and International Pension Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2024
Amounts recognized in the consolidated balance sheets consist of:      
Non-current liabilities $ (40.3) $ (39.2)  
Pension Plan | UNITED STATES      
Change in benefit obligation:      
Benefit obligation at beginning of year 56.7 163.8  
Service cost 3.2 4.6 $ 3.6
Interest cost 2.9 7.8 7.8
Actuarial (gains) losses (4.7) (12.1)  
Settlements 0.0 (95.2)  
Benefits paid (3.8) (12.2)  
Foreign currency and other 0.0 0.0  
Benefit obligation at end of year 54.3 56.7 163.8
Change in plan assets:      
Fair value of plan assets at beginning of year 26.4 134.5  
Actual loss on plan assets (0.7) (1.6)  
Employer contributions 3.4 0.9  
Benefits paid (3.8) (12.2)  
Settlements 0.0 (95.2)  
Foreign currency and other 0.0 0.0  
Fair value of plan assets at end of year 25.3 26.4 134.5
Funded status at the end of year (29.0) (30.3)  
Amounts recognized in the consolidated balance sheets consist of:      
Non-current assets 5.8 5.4  
Current liabilities (3.4) (3.4)  
Non-current liabilities (31.4) (32.3)  
Net amount recognized in consolidated balance sheets (29.0) (30.3)  
Accumulated benefit obligation 53.4 55.6  
Pre-tax amounts in accumulated other comprehensive loss:      
Prior service cost 0.0 0.0  
Net actuarial loss (2.0) (4.8)  
Amounts in accumulated other comprehensive loss (2.0) (4.8)  
Pension Plan | UNITED STATES | Pensions plans in which benefit obligation exceeds plan assets:      
Pensions plans in which benefit obligation exceeds plan assets:      
Projected benefit obligation 34.8 35.7  
Accumulated benefit obligation 33.9 34.6  
Pension Plan | UNITED STATES | Pensions plans in which plan assets exceed benefit obligation:      
Pensions plans in which plan assets exceed benefit obligation:      
Projected benefit obligation 19.5 21.0  
Accumulated benefit obligation 19.5 21.0  
Plan assets 25.3 26.4  
Pension Plan | International Plans      
Change in benefit obligation:      
Benefit obligation at beginning of year 31.9 34.0  
Service cost 1.0 0.8 0.9
Interest cost 2.1 1.9 2.0
Actuarial (gains) losses 0.5 (2.2)  
Settlements 0.0 (1.4)  
Benefits paid (2.7) (2.4)  
Foreign currency and other 0.9 1.2  
Benefit obligation at end of year 33.7 31.9 34.0
Change in plan assets:      
Fair value of plan assets at beginning of year 28.9 34.6  
Actual loss on plan assets (0.5) (3.2)  
Employer contributions 0.0 1.0  
Benefits paid (1.5) (1.6)  
Settlements 0.0 (2.6)  
Foreign currency and other 0.1 0.7  
Fair value of plan assets at end of year 27.0 28.9 $ 34.6
Funded status at the end of year (6.7) (3.0)  
Amounts recognized in the consolidated balance sheets consist of:      
Non-current assets 2.6 4.3  
Current liabilities (0.4) (0.4)  
Non-current liabilities (8.9) (6.9)  
Net amount recognized in consolidated balance sheets (6.7) (3.0)  
Accumulated benefit obligation 30.3 29.0  
Pre-tax amounts in accumulated other comprehensive loss:      
Prior service cost (0.1) (0.2)  
Net actuarial loss 14.0 12.4  
Amounts in accumulated other comprehensive loss 13.9 12.2  
Pension Plan | International Plans | Pensions plans in which benefit obligation exceeds plan assets:      
Pensions plans in which benefit obligation exceeds plan assets:      
Projected benefit obligation 9.3 7.3  
Accumulated benefit obligation 5.9 4.4  
Pension Plan | International Plans | Pensions plans in which plan assets exceed benefit obligation:      
Pensions plans in which plan assets exceed benefit obligation:      
Projected benefit obligation 24.4 24.6  
Accumulated benefit obligation 24.4 24.6  
Plan assets $ 27.0 $ 28.9