Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Total Mountain net revenue									$ 1,710,443	$ 1,956,201	$ 1,722,922
Lodging									248,414	314,662	284,643
Total Resort net revenue									1,958,857	2,270,863	2,007,565
Real Estate									4,847	712	3,988
Total net revenue	$ 77,209	$ 694,087	$ 924,638	$ 267,770	$ 244,006	$ 957,987	$ 849,578	$ 220,004	1,963,704	2,271,575	2,011,553
Mountain									1,212,053	1,279,567	1,132,840
Lodging									245,145	286,562	259,637
Resort									1,457,198	1,566,129	1,392,477
Real estate									9,182	5,609	3,546
Total segment operating expense									1,466,380	1,571,738	1,396,023
Gain on sale of real property									207	580	515
Mountain equity investment income, net									1,690	1,960	1,523
Total Reported EBITDA									499,221	702,377	617,568
Real estate held for sale and investment	96,844				101,021				96,844	101,021	99,385
Income before provision for income taxes									116,433	398,965	340,092
Depreciation and amortization									249,572	218,117	204,462
Asset impairments									28,372	0	0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property									(838)	664	4,620
Change in fair value of contingent consideration									(2,964)	5,367	(1,854)
Investment Income, Interest									(1,305)	(3,086)	(1,944)
Foreign currency loss on intercompany loans									3,230	2,854	8,966
Interest Expense									106,721	79,496	63,226
(Provision) benefit from income taxes (Note 11)									(7,378)	(75,472)	61,138
Net income	(157,965)	159,831	217,018	(109,829)	(92,301)	308,530	217,990	(110,726)	109,055	323,493	401,230
Net income attributable to noncontrolling interests									(10,222)	(22,330)	(21,332)
Net income	(153,608)	$ 152,546	$ 206,370	$ (106,475)	(89,525)	$ 292,134	$ 206,349	$ (107,795)	98,833	301,163	379,898
Property, Plant and Equipment, Net	$ 2,192,679				$ 1,842,500				2,192,679	1,842,500
Resort [Member]
Total Reported EBITDA									503,349	706,694	616,611
Mountain [Member]
Total Reported EBITDA									500,080	678,594	591,605
Lodging [Member]
Total Reported EBITDA									3,269	28,100	25,006
Real Estate [Member]
Total Reported EBITDA									$ (4,128)	$ (4,317)	$ 957