v3.25.2
Comprehensive Income - Schedule of Tax Expense or Benefit Allocated to Each Component of Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
May 31, 2025
May 31, 2024
May 31, 2025
May 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Before Tax Amount $ 28.4 $ 1.1 $ 0.7 $ 1.3
Tax (Expense) Benefit (0.1) (0.3) (0.4) (0.6)
Other comprehensive income items, net of tax 28.3 0.8 0.3 0.7
Foreign currency translation adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Before Tax Amount 27.8 0.3 (1.2) (1.1)
Tax (Expense) Benefit 0.0 0.0 0.0 0.0
Other comprehensive income items, net of tax 27.8 0.3 (1.2) (1.1)
Actuarial losses on defined benefit pension plans        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Before Tax Amount 0.6 0.8 1.9 2.4
Tax (Expense) Benefit (0.1) (0.3) (0.4) (0.6)
Other comprehensive income items, net of tax $ 0.5 $ 0.5 $ 1.5 $ 1.8