Acquisitions (Summary Of Estimate Of Fair Value Of Identifiable Assets Acquired And Liabilities Assumed) (Details) $ / shares in Units, shares in Thousands, $ in Thousands, $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2016 USD ($)	Jul. 31, 2019 USD ($)	Jul. 31, 2019 AUD ($)	Jul. 31, 2018 USD ($)	Jul. 31, 2017 USD ($) shares	Oct. 17, 2016 USD ($)	Oct. 14, 2016 $ / shares
Business Acquisition [Line Items]
Indefinite-Lived Trademarks		$ 215,905		$ 205,083
Unfavorable lease obligations, net		19,017		21,839
Goodwill, Acquired During Period		152,049		344
Falls Creek and Hotham [Member]
Business Acquisition [Line Items]
Business Combination, Cash Consideration Transferred		127,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		6,986
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		54,889
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		5,833
Goodwill, Acquired During Period		71,538
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		11,894
Business Combination, Consideration Transferred			$ 178.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		127,352
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed		4,600
Stamp Duty Expense		2,900
Whistler Blackcomb [Member]
Business Acquisition [Line Items]
Shares Purchased to Acquire Business | shares					38,500
Share Exchange Ratio							0.097294
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares					3,746
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Canyons [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Land		31,818		31,818
Business Acquisition, Purchase Price Allocation, Land Improvements		49,228		49,228
Business Acquisition, Purchase Price Allocation, Buildings and Building Improvements		42,160		42,660
Business Acquisition, Purchase Price Allocation, Machinery and Equipment		60,384		60,384
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment Gross (under Capital Lease)		183,590		184,090
Business Acquisition, Purchase Price Allocation, Accumulated Depreciation		(56,040)		(46,502)
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment Net (under Capital Lease)		127,550		137,588
Stevens Pass [Member]
Business Acquisition [Line Items]
Business Combination, Cash Consideration Transferred		64,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		752
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		34,865
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent		886
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		2,680
Goodwill, Acquired During Period		28,878
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		4,029
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		64,032
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed		1,200
Proceeds from (Repayments of) Debt		70,000
Triple Peaks, LLC [Member]
Business Acquisition [Line Items]
Business Combination, Cash Consideration Transferred		74,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		5,197
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		159,799
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent		3,093
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		27,360
Goodwill, Acquired During Period		51,633
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		17,989
Business Combination, Consideration Transferred		229,100
Business Combination, Consideration Transferred, Other		155,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		229,093
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed		2,800
Proceeds from (Repayments of) Debt		195,600
Mountain [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period		$ 152,049		$ 344
United States of America, Dollars | Whistler Blackcomb [Member]
Business Acquisition [Line Items]
Indefinite-Lived Trademarks						$ 139,977
Share Price | $ / shares							$ 153.41
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned						574,645
Business Combination, Cash Consideration Transferred					$ 512,558
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables						36,820
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						332,609
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent						7,992
Business Acquisition, Purchase Price Allocation, Real estate held for sale and investment						8,216
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill						150,681
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities						74,358
Business Combination, Consideration Transferred					1,087,203
Business Combination, Consideration Transferred, Other					4,308
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net					1,272,314	1,272,314
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets						1,973
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt						144,922
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other						3,156
Finite-Lived Customer Relationships, Gross						$ 6,596
Payments to Acquire Management Contract Rights	$ 4,108
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed					3,200
United States of America, Dollars | Mountain [Member] | Whistler Blackcomb [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period					956,459
Noncontrolling Interest [Member]
Business Acquisition [Line Items]
Acquisition of noncontrolling interest (Note 5)					$ 180,803