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, 2018	Oct. 31, 2017
Earnings Per Share [Abstract]
Net earnings	$ 73.8	$ 60.9
Weighted average common shares outstanding:
Basic (in shares)	128.8	130.8
Dilutive impact of share based awards (in shares)	2.2	1.9
Diluted (in shares)	131.0	132.7
Basic earnings (loss) per share (in usd per share)	$ 0.57	$ 0.47
Diluted net earnings (loss) per share (in usd per share)	$ 0.56	$ 0.46