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Revenue Recognition - Disaggregated Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Disaggregation of Revenue [Line Items]
Total sales	$ 776.6	$ 824.2	$ 1,568.6	$ 1,658.9
Independent sales network
Disaggregation of Revenue [Line Items]
Total sales	592.7	596.9	1,192.2	1,214.9
Direct sales network
Disaggregation of Revenue [Line Items]
Total sales	73.9	73.3	150.2	157.6
Retail sales
Disaggregation of Revenue [Line Items]
Total sales	43.0	56.8	98.0	110.2
Corporate accounts
Disaggregation of Revenue [Line Items]
Total sales	26.7	54.8	50.7	88.3
Other
Disaggregation of Revenue [Line Items]
Total sales	$ 40.3	$ 42.4	$ 77.5	$ 87.9

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