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Special Charges (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Feb. 28, 2023
Nov. 30, 2022
Feb. 28, 2022
Feb. 28, 2023
Feb. 28, 2022
Restructuring Cost and Reserve [Line Items]          
Special charges $ 0.0 $ 6.9 $ 0.0 $ 6.9 $ 0.0
Operating lease, impairment loss   4.3      
Employee Severance and Other Costs          
Restructuring Cost and Reserve [Line Items]          
Special charges   $ 2.6