LEASES - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Leases | ||||
| Right of use assets obtained in exchange for lease liabilities | $ 6.9 | $ 0.5 | $ 8.2 | $ 7.0 |
| Additional operating lease liabilities | 6.9 | |||
| Disposal Group, Held-for-Sale, Not Discontinued Operations | Cboe Australia and Cboe Canada | ||||
| Leases | ||||
| Operating lease right of use assets | 5.7 | 5.7 | ||
| Disposal group, including discontinued operation, operating lease liability | $ 5.9 | $ 5.9 | ||
| Minimum | ||||
| Leases | ||||
| Renewal term | 1 year | 1 year | ||
| Maximum | ||||
| Leases | ||||
| Renewal term | 5 years | 5 years | ||
| Option to terminate period (in years) | 1 year | |||