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