Revenue Recognition - Disaggregated Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Disaggregation of Revenue [Line Items]
Total sales	$ 909.1	$ 776.6	$ 1,835.2	$ 1,568.6
Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	863.1	736.8	1,746.7	1,490.4
Operating segments | ISG
Disaggregation of Revenue [Line Items]
Total sales	50.0	43.3	96.4	84.1
Eliminations
Disaggregation of Revenue [Line Items]
Total sales	(4.0)	(3.5)	(7.9)	(5.9)
Independent sales network | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	614.3	549.9	1,251.1	1,109.4
Direct sales network | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	83.2	79.2	173.2	159.3
Retail sales | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	42.7	43.7	89.6	99.7
Corporate accounts | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	53.6	26.2	90.6	49.1
Other | Operating segments | ABL
Disaggregation of Revenue [Line Items]
Total sales	$ 69.3	$ 37.8	$ 142.2	$ 72.9