Condensed Consolidated Statements Of (Loss) Earnings - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Income Statement [Abstract]
Net sales	$ 664.7	$ 550.6	$ 1,309.5	$ 1,103.6
Cost of sales	445.8	362.7	866.3	721.5
Gross profit	218.9	187.9	443.2	382.1
Operating expenses	137.3	118.5	270.9	236.3
Operating income	81.6	69.4	172.3	145.8
Interest expense	5.1	4.8	10.3	9.6
Other expense (income), net	0.1	(1.7)	0.9	(9.8)
Earnings before income taxes	76.4	66.3	161.1	146.0
Income taxes	129.3	19.8	153.1	41.5
Net (loss) earnings	$ (52.9)	$ 46.5	$ 8.0	$ 104.5
Weighted average shares - basic (in shares)	130.6	132.9	130.7	133.2
Weighted average shares - diluted (in shares)	130.6	134.4	132.8	134.5
Net (loss) earnings per share - basic (in usd per share)	$ (0.40)	$ 0.35	$ 0.06	$ 0.78
Net (loss) earnings per share - diluted (in usd per share)	(0.40)	0.35	0.06	0.78
Cash dividends paid (in usd per share)	$ 0.18	$ 0.175	$ 0.36	$ 0.35