CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
Income Statement [Abstract]
Net sales	$ 703.7	$ 664.7	$ 1,405.1	$ 1,309.5
Cost of sales	478.3	445.8	941.3	866.3
Gross profit	225.4	218.9	463.8	443.2
Operating expenses	140.3	138.8	280.0	274.0
Operating income	85.1	80.1	183.8	169.2
Interest expense	5.3	5.1	9.5	10.3
Other income, net	(0.7)	(1.4)	(2.6)	(2.2)
Earnings before income taxes	80.5	76.4	176.9	161.1
Income taxes	20.4	129.3	43.0	153.1
Net earnings (loss)	$ 60.1	$ (52.9)	$ 133.9	$ 8.0
Weighted average shares - basic (in shares)	128.3	130.6	128.6	130.7
Weighted average shares - diluted (in shares)	130.0	130.6	130.6	132.8
Net earnings (loss) per share - basic (in usd per share)	$ 0.47	$ (0.40)	$ 1.04	$ 0.06
Net earnings (loss) per share - diluted (in usd per share)	0.46	(0.40)	1.03	0.06
Dividends paid per share (in usd per share)	$ 0.19	$ 0.18	$ 0.38	$ 0.36