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
	Oct. 31, 2019	Oct. 31, 2018
Earnings Per Share [Abstract]
Net earnings for basic and diluted earnings per share computation	$ 65.0	$ 73.8
Weighted average common shares outstanding:
Weighted average common shares - basic (in shares)	126.9	128.8
Dilutive impact of share based awards (in shares)	1.7	2.2
Weighted average common shares - diluted (in shares)	128.6	131.0
Net earnings per share - basic (in usd per share)	$ 0.51	$ 0.57
Net earnings per share - diluted (in usd per share)	$ 0.51	$ 0.56