Acquisitions (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014	Jul. 31, 2014
Goodwill, Purchase Accounting Adjustments					$ 32,900,000
Payments to Acquire Businesses, Net of Cash Acquired			182,500,000	0
Long-term Debt	635,935,000us-gaap_LongTermDebt	799,284,000us-gaap_LongTermDebt	635,935,000us-gaap_LongTermDebt	799,284,000us-gaap_LongTermDebt	626,622,000us-gaap_LongTermDebt
Gain (Loss) Related to Litigation Settlement	0	0	16,400,000	0
Park City litigation payment to Talisker			(10,000,000)mtn_ParkCitylitigationpaymenttoTalisker	0mtn_ParkCitylitigationpaymenttoTalisker
PCMR [Member]
Goodwill, Purchase Accounting Adjustments	13,000,000
Business Acquisition, Pro Forma Revenue		473,865,000	660,535,000	600,057,000
Effective date of business acquisition			Sep. 11, 2014
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			46 years
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	27,600,000		28,400,000
Business Acquisition, Pro Forma Net Income (Loss)		62,252,000	51,978,000	(14,413,000)
Business Acquisition, Pro Forma Earnings Per Share, Basic		$ 1.72	$ 1.43	$ (0.40)
Business Combination, Consideration Transferred			182,500,000
Gain (Loss) Related to Litigation Settlement			16,400,000
Fair value of litigation settlement			10,100,000
Business Combination, Consideration Transferred, Other			26,500,000
Park City litigation payment to Talisker			10,000,000
Business Acquisition, Transaction Costs			800,000
Business Acquisition, Pro Forma Earnings Per Share, Diluted		$ 1.68	$ 1.39	$ (0.40)
Canyons Obligation [Member]
Long-term Debt	$ 314,657,000	$ 309,093,000	$ 314,657,000	$ 309,093,000	$ 311,858,000

Business Combination, Cash Consideration Transferred

No definition available.

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- Definition

Fair value of litigation settlement that applies to the period prior to the Canyons transaction.

+ References

No definition available.

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- Definition

Litigation settlement accounted for as consideration

+ References

No definition available.

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- Definition

Park City litigation payment to Talisker

+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 30

-Section 50

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- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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- Definition

For transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination, such as related to pre-existing relationships with the acquiree, this element represents the disclosure of the amount of acquisition related costs which have been expensed.

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- Definition

Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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-Glossary Investing Activities

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