Earnings Per Share (Information Necessary to Calculate Basic and Diluted Net Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Earnings Per Share [Abstract]
Net earnings	$ 71.8	$ 56.2	$ 148.8	$ 118.1
Weighted average common shares outstanding
Weighted average common shares - basic (in shares)	123.9	126.6	124.1	126.7
Dilutive impact of share-based awards (in shares)	1.7	1.6	1.9	1.5
Weighted average common shares - diluted (in shares)	125.6	128.2	126.0	128.2
Net earnings per share - basic (in usd per share)	$ 0.58	$ 0.44	$ 1.20	$ 0.93
Net earnings per share - diluted (in usd per share)	$ 0.57	$ 0.44	$ 1.18	$ 0.92
Options excluded from the diluted net earnings per share calculation (in shares)	1.6	0.8	0.0	0.9