Summary of Final Fair Value Assigned to Net Assets Acquired (Detail) - USD ($) $ in Thousands	Feb. 01, 2019	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Amortizable intangible assets:
Goodwill		$ 1,358,032	$ 377,693	$ 377,693
Erwin Hymer Group [Member]
Cash	$ 97,887
Inventory	593,053
Other assets	429,150
Property, plant and equipment, rental vehicles	80,132
Property, plant and equipment	447,621	$ 522,830
Amortizable intangible assets:
Goodwill	1,008,472
Guarantee liabilities related to former EHG North American subsidiaries	(115,668)
Other current liabilities	(850,623)
Debt – Unsecured notes	(114,710)
Debt – Other	(166,196)
Deferred income tax liabilities	(155,863)
Other long-term liabilities	(17,205)
Non-controlling interests	(12,207)
Total fair value of net assets acquired	1,900,632
Less: cash acquired	(97,887)
Total fair value of net assets acquired, less cash acquired	1,802,745
Dealer network | Erwin Hymer Group [Member]
Amortizable intangible assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	355,601
Trademarks | Erwin Hymer Group [Member]
Amortizable intangible assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	126,181
Technology assets | Erwin Hymer Group [Member]
Amortizable intangible assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	183,536
Backlog | Erwin Hymer Group [Member]
Amortizable intangible assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 11,471