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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

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)			2021						2020						2019
Stock awards			86						87						519
Total			86						87						519

Basic and diluted earnings per share

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

			2021						2020						2019
Net Income Attributable to CME Group (in millions)			$	2,636.4					$	2,105.2					$	2,116.5
Less: Preferred stock dividends			(19.0)						—						—
Less: Undistributed earnings allocated to preferred stock			(0.3)						—						—
Net Income Attributable to Common Shareholders of CME Group			$	2,617.1					$	2,105.2					$	2,116.5
Weighted Average Common Shares Outstanding (in thousands):
Basic			358,340						357,764						357,155
Effect of stock options and stock awards			589						760						1,084
Diluted			358,929						358,524						358,239
Earnings per Common Share Attributable to Common Shareholders of CME Group:
Basic			$	7.30					$	5.88					$	5.93
Diluted			7.29						5.87						5.91

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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 http://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 http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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