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Network
2412406 - Disclosure - INCOME TAXES - Reconciliation of the Beginning and Ending Uncertain Tax Positions (Details)
(http://www.cboe.com/role/IncomeTaxesReconciliationOfBeginningAndEndingUncertainTaxPositionsDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001374310 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
 
 
 
Balance as of January 1
31,903,000  
35,429,000  
26,745,000  
Gross increases on tax positions in prior period
8,801,000  
70,000  
2,828,000  
Gross decreases on tax positions in prior period
(608,000) 
(4,245,000) 
(1,053,000) 
Gross increases on tax positions in current period
3,591,000  
1,891,000  
8,113,000  
Lapse of statute of limitations
(1,816,000) 
(1,242,000) 
(1,204,000) 
Balance as of December 31
41,871,000  
 
31,903,000  
 
35,429,000