Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Aug. 01, 2019	Jul. 31, 2019
Operating Lease, Liability, Current	$ 36,604	$ 34,900	$ 0
Operating Leases, Future Minimum Payments Due, Next Twelve Months	47,013		44,984
Capital Leases, Future Minimum Payments Due, Next Twelve Months			28,253
Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months	$ 28,818
Operating Lease, Weighted Average Remaining Lease Term	10 years 7 months 6 days
Operating Lease, Payments	$ 55,344
Finance Lease, Right-of-Use Asset, Amortization	9,753
Finance Lease, Interest Expense	34,035
Operating Lease, Expense	43,303
Short-term Lease, Cost	13,943
Variable Lease, Cost	1,583
Operating Cash Outflows for Finance Leases	29,311
Financing Cash Outflows for Finance Leases	$ 5,387
Finance Lease, Weighted Average Remaining Lease Term	42 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	10.00%
Operating Leases, Future Minimum Payments, Due in Two Years	$ 43,699		42,512
Capital Leases, Future Minimum Payments Due in Two Years			28,818
Finance Lease, Liability, to be Paid, Year Two	29,394
Operating Leases, Future Minimum Payments, Due in Three Years	38,353		39,440
Capital Leases, Future Minimum Payments Due in Three Years			29,394
Finance Lease, Liability, to be Paid, Year Three	29,982
Operating Leases, Future Minimum Payments, Due in Four Years	34,431		34,840
Capital Leases, Future Minimum Payments Due in Four Years			29,982
Finance Lease, Liability, to be Paid, Year Four	30,582
Operating Leases, Future Minimum Payments, Due in Five Years	32,405		30,836
Capital Leases, Future Minimum Payments Due in Five Years			30,582
Finance Lease, Liability, to be Paid, Year Five	31,193
Lessee, Operating Lease, Liability, to be Paid, after Year Five	137,501
Finance Lease, Liability, to be Paid, after Year Five	1,773,855
Lessee, Operating Lease, Liability, to be Paid	333,402
Finance Lease, Liability, Payment, Due	1,923,824
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(79,256)
Finance Lease, Liability, Undiscounted Excess Amount	(1,577,790)
Operating Lease, Liability	254,146	$ 254,200
Finance Lease, Liability	346,034
Operating Leases, Future Minimum Payments, Due Thereafter			142,526
Capital Leases, Future Minimum Payments Due Thereafter			1,805,048
Operating Leases, Future Minimum Payments Due			335,138
Capital Leases, Future Minimum Payments Due			1,952,077
Capital Leases, Future Minimum Payments, Interest Included in Payments			(1,611,816)
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments			340,261
Long-term Debt	2,444,248		$ 1,580,130
Operating Lease, Right-of-Use Asset	117,800
Finance Lease, Right-of-Use Asset, Accumulated Amortization	65,800
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 18,013
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	mtn:AccountsPayableAccruedLiabilities	mtn:AccountsPayableAccruedLiabilities	mtn:AccountsPayableAccruedLiabilities
Minimum [Member]
Lessee Operating And Finance Lease Term	1 year
Maximum [Member]
Lessee Operating And Finance Lease Term	60 years
Canyons Obligation [Member]
Long-term Debt	$ 346,034		$ 340,261