Equity - Redeemable Noncontrolling Interest (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Noncontrolling Interest [Line Items] | |
| Interest in joint venture minimum (as a percent) | 20.00% |
| Change in control period | 15 days |
| CME Group | |
| Noncontrolling Interest [Line Items] | |
| Noncontrolling interest ownership by noncontrolling owners (as a percent) | 27.00% |