XML 77 R55.htm IDEA: XBRL DOCUMENT v3.25.3
Significant Accounting Policies - Components of Other Comprehensive Income Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2023
Defined benefit pension plans - Net of Tax Amount      
Other comprehensive income (loss) - before tax $ 47.2 $ (1.1) $ 14.5
Other comprehensive income (loss) - tax (expense) or benefit (8.8) (1.2) (1.3)
Other comprehensive income (loss) items, net of tax 38.4 (2.3) 13.2
Foreign Currency Items      
Foreign currency translation adjustments - Before Tax Amount      
Foreign currency translation adjustments 10.8 (5.9) 8.5
Foreign currency translation adjustments - Tax (Expense) or Benefit      
Foreign currency translation adjustments 0.0 0.0 0.0
Foreign currency translation adjustments - Net of Tax Amount      
Foreign currency translation adjustments 10.8 (5.9) 8.5
Defined benefit pension plans - Net of Tax Amount      
Other comprehensive income (loss) items, net of tax 10.8 (5.9)  
Actuarial amounts      
Defined benefit pension plans - Before Tax Amounts      
Actuarial gains, before tax 2.8 1.4 0.4
Defined benefit pension plans - Tax (Expense) or Benefit      
Actuarial amounts (0.7) (0.4) 0.0
Defined benefit pension plans - Net of Tax Amount      
Actuarial gains, net of tax 2.1 1.0 0.4
Prior service cost      
Defined benefit pension plans - Before Tax Amounts      
Amortization of defined benefit pension items- Prior service cost 0.1 0.1 2.6
Defined benefit pension plans - Tax (Expense) or Benefit      
Amortization of defined benefit pension items- Prior service cost 0.0 0.0 (0.6)
Defined benefit pension plans - Net of Tax Amount      
Amortization of defined benefit pension items- Prior service cost 0.1 0.1 2.0
Actuarial losses      
Defined benefit pension plans - Before Tax Amounts      
Amortization of defined benefit pension items - Actuarial losses 2.6 3.3 3.0
Defined benefit pension plans - Tax (Expense) or Benefit      
Amortization of defined benefit pension items- Actuarial losses (0.7) (0.8) (0.7)
Defined benefit pension plans - Net of Tax Amount      
Amortization of defined benefit pension items- Actuarial losses 1.9 2.5 2.3
Settlement losses      
Defined benefit pension plans - Before Tax Amounts      
Amortization of defined benefit pension items- Settlement losses 30.9 0.0 0.0
Defined benefit pension plans - Tax (Expense) or Benefit      
Amortization of defined benefit pension items - Settlement losses (7.4) 0.0 0.0
Defined benefit pension plans - Net of Tax Amount      
Amortization of defined benefit pension items- Settlement losses 23.5 0.0 0.0
Defined Benefit Pension Plans      
Defined benefit pension plans - Before Tax Amounts      
Total defined benefit plans, net - before tax 36.4 4.8 6.0
Defined benefit pension plans - Tax (Expense) or Benefit      
Total defined benefit plans, net - tax (expense) or benefit (8.8) (1.2) (1.3)
Defined benefit pension plans - Net of Tax Amount      
Total defined benefit plans, net - net of tax 27.6 3.6 $ 4.7
Other comprehensive income (loss) items, net of tax $ 27.6 $ 3.6