v3.26.1
CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2024
Cash dividends on common stock, per share (in dollars per share) $ 1.30 $ 1.25 $ 8.75 $ 2.50  
Repurchase of up to         $ 3,000.0
Average price (in dollars per share) $ 273.14 $ 253.05 $ 280.87 $ 253.05  
Repurchase of Class A common stock $ 698.2 [1] $ 8.2 [2] $ 1,236.9 [1] $ 8.2 [2]  
Share repurchase program 1,500.0 3,000.0 1,500.0 3,000.0  
Preferred Stock, Common Stock and Additional Paid-in Capital          
Repurchase of Class A common stock $ 700.0 $ 8.2 $ 1,200.0 $ 8.2  
Common Class A          
Shares of outstanding (in shares) 2,546,284 32,265 4,384,776 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 six months ended June 30, 2026, 2,546,284 and 4,384,776 shares of outstanding Class A common stock were repurchased, respectively. The average price was $273.14 per share for a total of $0.7 billion (excluding excise tax) during the second quarter of 2026 and $280.87 per share for a total of $1.2 billion (excluding excise tax) for the first six months of 2026. The remaining aggregate amount under the existing Share Repurchase Program is $1.5 billion. 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 six months ended June 30, 2025, 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. Shares are retired upon repurchase and not held as treasury stock.