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Revenue Recognition - Disaggregated Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Disaggregation of Revenue [Line Items]
Total sales	$ 899.7	$ 776.2	$ 2,468.3	$ 2,435.1
Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	850.0	741.6	2,340.4	2,327.8
Operating segments | ISG
Disaggregation of Revenue [Line Items]
Total sales	55.4	37.7	139.5	116.1
Eliminations
Disaggregation of Revenue [Line Items]
Total sales	(5.7)	(3.1)	(11.6)	(8.8)
Independent sales network | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	628.0	549.4	1,737.4	1,679.2
Direct sales network | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	96.7	69.4	256.0	240.1
Retail sales | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	36.1	48.7	135.8	161.1
Corporate accounts | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	44.0	39.1	93.1	126.6
Other | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	$ 45.2	$ 35.0	$ 118.1	$ 120.8

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