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Revenue Recognition - Disaggregated Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 3,461.0	$ 3,326.3	$ 3,672.7
Operating Segments | ABL
Disaggregation of Revenue [Line Items]
Net sales	3,287.3	3,180.9	3,548.4
Operating Segments | ISG
Disaggregation of Revenue [Line Items]
Net sales	190.0	157.0	137.5
Eliminations
Disaggregation of Revenue [Line Items]
Net sales	(16.3)	(11.6)	(13.2)
Independent sales network | Operating Segments | ABL
Disaggregation of Revenue [Line Items]
Net sales	2,400.5	2,284.3	2,397.6
Direct sales network | Operating Segments | ABL
Disaggregation of Revenue [Line Items]
Net sales	358.1	329.0	383.3
Retail sales | Operating Segments | ABL
Disaggregation of Revenue [Line Items]
Net sales	181.5	218.3	273.0
Corporate accounts | Operating Segments | ABL
Disaggregation of Revenue [Line Items]
Net sales	168.7	191.8	312.8
Other | Operating Segments | ABL
Disaggregation of Revenue [Line Items]
Net sales	$ 178.5	$ 157.5	$ 181.7

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