v3.26.3
CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2024
Cash dividends on common stock, per share (in dollars per share) $ 1.30 $ 1.25 $ 10.05 $ 3.75  
Repurchase of up to         $ 3,000.0
Average price (in dollars per share) $ 255.81 $ 253.05 $ 272.89 $ 253.05  
Repurchase of Class A common stock $ 533.5 [1]   $ 1,770.4 [1] $ 8.2 [2]  
Share repurchase program 1,000.0 $ 3,000.0 1,000.0 3,000.0  
Preferred Stock, Common Stock and Additional Paid-in Capital          
Repurchase of Class A common stock $ 500.0 $ 8.2 $ 1,800.0 $ 8.2  
Common Class A          
Shares of outstanding (in shares) 2,047,234 0 6,432,010 32,265  
[1]
(1) In December 2024, the board of directors approved a share repurchase program (the Share Repurchase Program), which authorizes the repurchase of up to $3.0 billion of CME Group Class A common stock at prevailing market prices. During the three and nine months ended September 30, 2026, 2,047,234 and 6,432,010 shares of outstanding Class A common stock were repurchased, respectively. The average price was $255.81 per share for a total of $0.5 billion (excluding excise tax) during the third quarter of 2026 and $272.89 per share for a total of $1.8 billion (excluding excise tax) for the first nine months of 2026. The remaining aggregate amount under the existing Share Repurchase Program is $1.0 billion as of September 30, 2026. Shares are retired upon repurchase and not held as treasury stock.
[2]
(1) In December 2024, the board of directors approved a share repurchase program (the Share Repurchase Program), which authorizes the repurchase of up to $3.0 billion of CME Group Class A common stock at prevailing market prices. During the three and nine months ended September 30, 2025, 0 and 32,265 shares of outstanding Class A common stock were repurchased at an average price of $253.05 per share for a total of $8.2 million The remaining aggregate amount under the existing Share Repurchase Program is $3.0 billion as of September 30, 2025. Shares are retired upon repurchase and not held as treasury stock.