ACQUISITIONS - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Business Combinations [Abstract]
Net sales	$ 16,359,983	$ 13,075,712	$ 8,870,746
Net income attributable to THOR Industries, Inc.	$ 1,144,617	$ 689,198	$ 223,861
Basic earnings per common share (in dollars per share)	$ 20.80	$ 12.46	$ 4.06
Diluted earnings per common share (in dollars per share)	$ 20.71	$ 12.38	$ 4.04