Document And Entity Information
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9 Months Ended | |||||
---|---|---|---|---|---|---|
Sep. 30, 2014
|
Oct. 15, 2014
Class A Common Stock [Member]
|
Oct. 15, 2014
Class B Common Stock, Class B-1 [Member]
|
Oct. 15, 2014
Class B Common Stock, Class B-2 [Member]
|
Oct. 15, 2014
Class B Common Stock, Class B-3 [Member]
|
Oct. 15, 2014
Class B Common Stock, Class B-4 [Member]
|
|
Document Type | 10-Q | |||||
Amendment Flag | false | |||||
Document Period End Date | Sep. 30, 2014 | |||||
Document Fiscal Period Focus | Q3 | |||||
Document Fiscal Year Focus | 2014 | |||||
Entity Registrant Name | CME GROUP INC. | |||||
Entity Central Index Key | 0001156375 | |||||
Current Fiscal Year End Date | --12-31 | |||||
Entity Filer Category | Large Accelerated Filer | |||||
Entity Common Stock, Shares Outstanding | 336,838,277 | 625 | 813 | 1,287 | 413 |