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COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Details)	Apr. 18, 2014 item
City of Providence | Pending Litigation
Loss Contingencies
The number of other securities exchanges a lawsuit has been filed against	14

X

- Definition

The number of other securities exchanges a lawsuit has been filed against.

+ References

No definition available.

+ Details

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Namespace Prefix:	cboe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_LitigationCaseAxis=cboe_CityOfProvidenceRhodeIslandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: