Document And Entity Information - USD ($)
12 Months Ended
Jul. 31, 2018
Sep. 24, 2018
Jan. 31, 2018
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jul. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Trading Symbol MTN    
Entity Registrant Name VAIL RESORTS INC    
Entity Central Index Key 0000812011    
Current Fiscal Year End Date --07-31    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Common Stock, Shares Outstanding   40,475,511  
Entity Public Float     $ 8,752,330,929