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Special Charges - Schedule of Details of Special Charges Incurred (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Restructuring Cost and Reserve [Line Items]
Total special charges	$ 3.3	$ 20.0	$ 1.8
Special Charges
Restructuring Cost and Reserve [Line Items]
Severance and employee-related costs	1.7	9.3	(0.5)
ROU lease asset impairment charges	0.0	7.4	0.0
Relocation and other restructuring costs	1.6	3.3	2.3
Total special charges	$ 3.3	$ 20.0	$ 1.8

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- Definition

Amount of loss from impairment of right-of-use asset from operating lease.

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