Acquisitions (Summary Of Estimate Of Fair Value Of Identifiable Assets Acquired And Liabilities Assumed) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2016 USD ($) shares	Jan. 31, 2016 USD ($)	Jan. 31, 2017 USD ($)	Jan. 31, 2016 USD ($)	Oct. 17, 2016 USD ($)	Oct. 14, 2016 $ / shares	Jan. 19, 2016 USD ($)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 512,348	$ 20,245
Goodwill Acquired During Period			956,086
Noncontrolling Interest, Increase from Business Combination			182,579
Whistler Blackcomb [Member]
Business Acquisition [Line Items]
Shares Purchased to Acquire Business | shares	38,500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Foreign Currency Exchange Rate, Translation						0.097294
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	3,746
Wilmot [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment							$ 12,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill							400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets							200
Goodwill Acquired During Period		$ 7,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable							$ 300
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Business Combination, Cash Consideration Transferred		$ 20,200
United States of America, Dollars | Whistler Blackcomb [Member]
Business Acquisition [Line Items]
Indefinite-Lived Trademarks					$ 139,977
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables					37,567
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment					332,609
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					152,035
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent					7,861
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets					1,907
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities					(74,108)
Business Combination, Consideration Transferred	$ 1,087,203
Finite-Lived Customer Relationships, Gross					7,950
Payments to Acquire Management Contract Rights	4,108
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, Consideration Transferred, Other	4,308
Total Estimated Purchase Consideration					1,274,090
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					$ (3,161)
Noncontrolling Interests [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Increase from Business Combination	$ 182,579		182,579
Mountain [Member] | United States of America, Dollars | Whistler Blackcomb [Member]
Business Acquisition [Line Items]
Goodwill Acquired During Period			$ 956,086