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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

Anti-dilutive stock awards were as follows for the years presented:

(in thousands)			2022						2021						2020
Stock awards			158						86						87
Total			158						86						87

Basic and diluted earnings per share

The following table presents the earnings per share calculation for the years presented:

			2022						2021						2020
Net Income Attributable to CME Group (in millions)			$	2,691.0					$	2,636.4					$	2,105.2
Less: Preferred stock dividends			(38.9)						(19.0)						—
Less: (Undistributed earnings) overdistributed earnings allocated to preferred stock			5.1						(0.3)						—
Net Income Attributable to Common Shareholders of CME Group			$	2,657.2					$	2,617.1					$	2,105.2
Weighted Average Common Shares Outstanding (in thousands):
Basic			358,713						358,340						357,764
Effect of stock options and stock awards			468						589						760
Diluted			359,181						358,929						358,524
Earnings per Common Share Attributable to Common Shareholders of CME Group:
Basic			$	7.41					$	7.30					$	5.88
Diluted			7.40						7.29						5.87

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- References

No definition available.

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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