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Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 2109100 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 2409403 - Disclosure - Earnings Per Share Anti-Dilutive Securities (Details) link:presentationLink link:calculationLink link:definitionLink 2409402 - Disclosure - Earnings Per Share (Net Income Attributable To CME Group) (Details) link:presentationLink link:calculationLink link:definitionLink 2309301 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 2108100 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 2408404 - Disclosure - Fair Value Measurements Fair Value Measurements Narrative (Detail) (Details) link:presentationLink link:calculationLink link:definitionLink 2408402 - Disclosure - Fair Value Measurements (Financial Instruments Measured At Fair Value On A Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 2408403 - 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