INTANGIBLE ASSETS, GOODWILL AND LONG-LIVED ASSETS - Summary of Components of Net Balance (Detail) - USD ($) $ in Thousands	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Goodwill [Line Items]
Goodwill	$ 1,503,942	$ 1,384,397
Accumulated impairment charges	(27,401)	(26,365)
Net balance	1,476,541	1,358,032	$ 377,693
Europe
Goodwill [Line Items]
Goodwill	1,037,929	980,339
Accumulated impairment charges	0	0
Net balance	1,037,929	980,339	0
Other
Goodwill [Line Items]
Goodwill	104,826	42,871
Accumulated impairment charges	0	0
Net balance	104,826	42,871	42,871
Towables | North American
Goodwill [Line Items]
Goodwill	343,935	343,935
Accumulated impairment charges	(10,149)	(9,113)
Net balance	333,786	334,822	334,822
Motorized | North American
Goodwill [Line Items]
Goodwill	17,252	17,252
Accumulated impairment charges	(17,252)	(17,252)
Net balance	$ 0	$ 0	$ 0