Document and Entity Information	9 Months Ended
	Aug. 31, 2017 shares
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	ISCA
Entity Registrant Name	INTERNATIONAL SPEEDWAY CORP
Entity Central Index Key	0000051548
Current Fiscal Year End Date	--11-30
Entity Filer Category	Large Accelerated Filer
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	24,455,713
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	19,733,394