INTANGIBLE ASSETS, GOODWILL AND LONG-LIVED ASSETS - Changes in Carrying Amount of Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 1,358,032	$ 377,693
Goodwill acquired	62,366	1,008,472
Foreign currency translation and other		(28,133)
Measurement period adjustment	871
Foreign currency translation and other	56,308
Impairment charge	(1,036)
Goodwill, Ending Balance	1,476,541	1,358,032
Europe
Goodwill [Line Items]
Goodwill, Beginning Balance	980,339	0
Goodwill acquired	0	1,008,472
Foreign currency translation and other		(28,133)
Measurement period adjustment	1,282
Foreign currency translation and other	56,308
Impairment charge	0
Goodwill, Ending Balance	1,037,929	980,339
Other
Goodwill [Line Items]
Goodwill, Beginning Balance	42,871	42,871
Goodwill acquired	62,366	0
Foreign currency translation and other		0
Measurement period adjustment	(411)
Foreign currency translation and other	0
Impairment charge	0
Goodwill, Ending Balance	104,826	42,871
Towables | North America
Goodwill [Line Items]
Goodwill, Beginning Balance	334,822	334,822
Goodwill acquired	0	0
Foreign currency translation and other		0
Measurement period adjustment	0
Foreign currency translation and other	0
Impairment charge	(1,036)
Goodwill, Ending Balance	333,786	334,822
Motorized | North America
Goodwill [Line Items]
Goodwill, Beginning Balance	0	0
Goodwill acquired	0	0
Foreign currency translation and other		0
Measurement period adjustment	0
Foreign currency translation and other	0
Impairment charge	0
Goodwill, Ending Balance	$ 0	$ 0