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Pension Plans (Tables)
6 Months Ended
Feb. 29, 2024
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension Cost Net periodic pension cost included the following components before tax for the periods presented (in millions):
 Three Months EndedSix Months Ended
 February 29, 2024February 28, 2023February 29, 2024February 28, 2023
Service cost$1.2 $1.2 $2.3 $2.3 
Interest cost2.4 2.3 4.9 4.5 
Expected return on plan assets(2.2)(2.4)(4.4)(4.8)
Amortization of prior service cost— 0.6 — 1.3 
Recognized actuarial loss0.8 0.7 1.6 1.5 
Net periodic pension cost$2.2 $2.4 $4.4 $4.8