Revenue (Disaggregation of Revenue by Geographical Area) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Disaggregation of Revenue
Total net sales	$ 679.1	$ 662.0	$ 1,315.8	$ 1,334.7
United States and Canada
Disaggregation of Revenue
Total net sales	256.2	267.5	507.2	554.4
Europe, Middle East and Africa (EMEA)
Disaggregation of Revenue
Total net sales	201.1	194.1	389.0	388.8
Asia Pacific
Disaggregation of Revenue
Total net sales	161.4	144.4	305.5	278.0
Latin America
Disaggregation of Revenue
Total net sales	$ 60.4	$ 56.0	$ 114.1	$ 113.5