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Pension Plans (Tables)
3 Months Ended
Nov. 30, 2023
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 Ended
 November 30, 2023November 30, 2022
Service cost$1.1 $1.1 
Interest cost2.5 2.2 
Expected return on plan assets(2.2)(2.4)
Amortization of prior service cost— 0.7 
Recognized actuarial loss0.8 0.8 
Net periodic pension cost$2.2 $2.4