Intangible Assets and Goodwill - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Goodwill [Line Items]
Goodwill	$ 1,915,388	$ 1,481,283	$ 1,563,255	$ 1,476,541
Goodwill acquired	373,685	17,882
Foreign currency translation	(21,552)	(13,140)
Other
Goodwill [Line Items]
Goodwill	496,393	122,708	122,708	104,826
Goodwill acquired	373,685	17,882
Foreign currency translation	0	0
European | Recreational vehicles
Goodwill [Line Items]
Goodwill	1,020,145	1,024,789	1,041,697	1,037,929
Goodwill acquired	0	0
Foreign currency translation	(21,552)	(13,140)
North American Towables | North America | Recreational vehicles
Goodwill [Line Items]
Goodwill	344,975	333,786	344,975	333,786
Goodwill acquired	0	0
Foreign currency translation	0	0
North American Motorized | North America | Recreational vehicles
Goodwill [Line Items]
Goodwill	53,875	0	$ 53,875	$ 0
Goodwill acquired	0	0
Foreign currency translation	$ 0	$ 0