Intangible Assets and Goodwill - Components of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2021	Jul. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,780,857	$ 1,390,126
Accumulated amortization	482,568	452,955
Dealer networks/customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	1,139,935	861,562
Accumulated amortization	347,875	327,751
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	366,152	311,208
Accumulated amortization	66,670	62,675
Design technology and other intangibles
Finite-Lived Intangible Assets [Line Items]
Cost	273,370	215,956
Accumulated amortization	67,615	62,237
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Cost	1,400	1,400
Accumulated amortization	$ 408	$ 292