Intangible Assets and Goodwill - Components of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2022	Jul. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,757,239	$ 1,390,126
Accumulated amortization	519,292	452,955
Dealer networks/customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	1,124,776	861,562
Accumulated amortization	376,085	327,751
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	361,817	311,208
Accumulated amortization	70,459	62,675
Design technology and other intangibles
Finite-Lived Intangible Assets [Line Items]
Cost	269,246	215,956
Accumulated amortization	72,223	62,237
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Cost	1,400	1,400
Accumulated amortization	$ 525	$ 292