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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | Anti-dilutive stock awards were as follows for the periods presented:
| Quarter Ended September 30, |  | Nine Months Ended September 30,
(in thousands) | 2025 |  | 2024 |  | 2025 |  | 2024
Stock awards | — |  |  | 333 |  |  | 79 |  |  | 334 |
Total | — |  |  | 333 |  |  | 79 |  |  | 334 |
Basic And Diluted Earnings Per Share | The following table presents the earnings per share calculation for the periods presented:
|  | Quarter Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Net Income (in millions) |  | $ | 908.0 |  |  | $ | 912.8 |  |  | $ | 2,889.3 |  |  | $ | 2,651.2 |
Less: preferred stock dividends |  | (5.7) |  |  | (5.3) |  |  | (17.2) |  |  | (15.8) |
Less: undistributed earnings allocated to preferred stock |  | (5.7) |  |  | (6.2) |  |  | (19.1) |  |  | (17.6) |
Net Income Attributable to Common Shareholders of CME Group |  | $ | 896.6 |  |  | $ | 901.3 |  |  | $ | 2,853.0 |  |  | $ | 2,617.8 |
Weighted Average Number of Common Shares (in thousands): |  |  |  |  |  |  |  |
Basic |  | 359,686 |  |  | 359,400 |  |  | 359,653 |  |  | 359,329 |
Effect of restricted stock and performance shares |  | 736 |  |  | 589 |  |  | 677 |  |  | 570 |
Diluted |  | 360,422 |  |  | 359,989 |  |  | 360,330 |  |  | 359,899 |
Earnings per Common Share Attributable to Common Shareholders of CME Group: |  |  |  |  |  |  |  |
Basic |  | $ | 2.49 |  |  | $ | 2.51 |  |  | $ | 7.93 |  |  | $ | 7.29 |
Diluted |  | 2.49 |  |  | 2.50 |  |  | 7.92 |  |  | 7.27 |

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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 + Details
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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 + Details
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