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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2024

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)			2024						2023						2022
Stock awards			89						455						158
Total			89						455						158

Basic and diluted earnings per share

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

			2024						2023						2022
Net Income Attributable to CME Group (in millions)			$	3,525.8					$	3,226.2					$	2,691.0
Less: Preferred stock dividends			(47.7)						(44.2)						(38.9)
Less: (Undistributed earnings) overdistributed earnings allocated to preferred stock			3.4						3.6						5.1
Net Income Attributable to Common Shareholders of CME Group			$	3,481.5					$	3,185.6					$	2,657.2
Weighted Average Common Shares Outstanding (in thousands):
Basic			359,389						359,023						358,713
Effect of stock options and stock awards			555						477						468
Diluted			359,944						359,500						359,181
Earnings per Common Share Attributable to Common Shareholders of CME Group:
Basic			$	9.69					$	8.87					$	7.41
Diluted			9.67						8.86						7.40

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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
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

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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
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

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