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		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Earnings Per Share [Abstract]
Net earnings for basic and diluted earnings per share computation	$ 63.4	$ 75.2	$ 192.9	$ 209.1
Weighted average common shares outstanding:
Weighted average common shares - basic (in shares)	126.9	128.2	127.0	128.5
Dilutive impact of share based awards (in shares)	0.8	1.8	1.5	1.9
Weighted average common shares - diluted (in shares)	127.7	130.0	128.5	130.4
Net earnings per share - basic (in usd per share)	$ 0.50	$ 0.59	$ 1.52	$ 1.63
Net earnings per share - diluted (in usd per share)	$ 0.50	$ 0.58	$ 1.50	$ 1.60