Document and Entity Information
 6 Months Ended
May 31, 2019
shares
Document Information [Line Items]  
Document Type 10-Q
Amendment Flag false
Document Period End Date May 31, 2019
Document Fiscal Year Focus 2019
Document Fiscal Period Focus Q2
Entity Registrant Name INTERNATIONAL SPEEDWAY CORP
Entity Central Index Key 0000051548
Current Fiscal Year End Date --11-30
Entity Filer Category Large Accelerated Filer
Entity Current Reporting Status Yes
Entity Shell Company false
Entity Emerging Growth Company false
Entity Small Business false
Class A Common Stock  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 23,861,482
Class B Common Stock  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 19,619,928