Acquisitions - Pro Forma Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Business Combinations [Abstract]
Net sales	$ 3,459,264	$ 1,826,765	$ 8,988,314	$ 6,403,792
Net income	$ 183,104	$ 20,966	$ 436,817	$ 103,623
Basic earnings per common share (in dollars per share)	$ 3.31	$ 0.38	$ 7.90	$ 1.88
Diluted earnings per common share (in dollars per share)	$ 3.29	$ 0.38	$ 7.85	$ 1.87