Revenue Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 3,875,018	$ 2,727,788	$ 7,833,242	$ 5,265,148
Operating segments | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	3,685,624	2,683,639	7,484,483	5,172,026
Operating segments | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	2,961,894	1,950,176	6,127,756	3,836,075
Operating segments | Europe | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	723,730	733,463	1,356,727	1,335,951
Operating segments | North American Towables | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	1,985,088	1,373,181	4,225,922	2,765,225
Operating segments | Travel Trailers | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	1,250,579	831,359	2,660,203	1,669,259
Operating segments | Fifth Wheels | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	734,509	541,822	1,565,719	1,095,966
Operating segments | North American Motorized | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	976,806	576,995	1,901,834	1,070,850
Operating segments | Class A | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	429,894	222,128	839,393	380,683
Operating segments | Class C | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	361,565	294,300	721,571	569,699
Operating segments | Class B | North America | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	185,347	60,567	340,870	120,468
Operating segments | Motorcaravan | Europe | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	350,861	419,137	667,125	737,480
Operating segments | Campervan | Europe | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	192,838	149,112	370,621	292,512
Operating segments | Caravan | Europe | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	91,153	71,654	151,833	126,849
Operating segments | Other RV-related | Europe | Recreational vehicles
Disaggregation of Revenue [Line Items]
Net sales	88,878	93,560	167,148	179,110
Other, net
Disaggregation of Revenue [Line Items]
Net sales	294,146	74,714	551,976	155,421
Intercompany eliminations
Disaggregation of Revenue [Line Items]
Net sales	$ (104,752)	$ (30,565)	$ (203,217)	$ (62,299)