Revenue Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 3,958,224	$ 2,537,360
Operating segments | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	3,798,859	2,488,387
Operating segments | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	3,165,862	1,885,899
Operating segments | European | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	632,997	602,488
Operating segments | Travel Trailers | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	1,409,624	837,900
Operating segments | Fifth Wheels | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	831,210	554,144
Operating segments | North American Towables | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	2,240,834	1,392,044
Operating segments | Class A | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	409,499	158,555
Operating segments | Class C | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	360,006	275,399
Operating segments | Class B | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	155,523	59,901
Operating segments | North American Motorized | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	925,028	493,855
Operating segments | Motorcaravan | European | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	316,264	318,343
Operating segments | Campervan | European | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	177,783	143,400
Operating segments | Caravan | European | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	60,680	55,195
Operating segments | Other RV-related | European | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	78,270	85,550
Other
Disaggregation of Revenue [Line Items]
Net sales	257,830	80,707
Intercompany eliminations
Disaggregation of Revenue [Line Items]
Net sales	$ (98,465)	$ (31,734)