Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Aug. 31, 2023
Disaggregation Of Revenue [Line Items]
Unsatisfied performance obligation amount	$ 1.0
Revenue recognized	12.1	$ 25.0
Other Current Assets [Member]
Disaggregation Of Revenue [Line Items]
Contract assets	1.1	1.1	$ 1.3
Other Current Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities	$ 18.3	$ 17.9	$ 20.5