Marketing Fee	6 Months Ended
Jun. 30, 2014
Marketing Fee [Abstract]
Marketing Fees	MARKETING FEE CBOE facilitates the collection and payment of marketing fees assessed on certain trades taking place at CBOE. Funds resulting from the marketing fees are made available to Designated Primary Market Makers and Preferred Market Makers as an economic inducement to route orders to CBOE. Pursuant to ASC 605-45, Revenue Recognition—Principal Agent Considerations, the Company reflects the assessments and payments on a net basis, with no impact on revenues or expenses. As of June 30, 2014 and December 31, 2013, amounts assessed by the Company on behalf of others included in current assets totaled $9.0 million and $8.9 million, respectively, and payments due to others included in current liabilities totaled $9.5 million and $9.4 million, respectively.

Marketing Fee

6 Months Ended

Jun. 30, 2014

MARKETING FEE

CBOE facilitates the collection and payment of marketing fees assessed on certain trades taking place at CBOE. Funds resulting from the marketing fees are made available to Designated Primary Market Makers and Preferred Market Makers as an economic inducement to route orders to CBOE. Pursuant to ASC 605-45, Revenue Recognition—Principal Agent Considerations, the Company reflects the assessments and payments on a net basis, with no impact on revenues or expenses.

As of June 30, 2014 and December 31, 2013, amounts assessed by the Company on behalf of others included in current assets totaled $9.0 million and $8.9 million, respectively, and payments due to others included in current liabilities totaled $9.5 million and $9.4 million, respectively.