Document and Entity Information Document - shares	9 Months Ended
	Sep. 30, 2015	Oct. 23, 2015
Entity [Abstract]
Entity Registrant Name	CBOE Holdings, Inc.
Entity Central Index Key	0001374310
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		82,454,983
Entity Current Reporting Status	Yes