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REGULATORY CAPITAL - Subsidiaries with Regulatory Capital Requirements (Details) $ in Millions | Dec. 31, 2025 USD ($)
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Cboe Trading |
Regulatory Capital Requirement [Line Items] |
Actual | $ 16.9
Minimum Requirement | 0.8
BIDS Trading |
Regulatory Capital Requirement [Line Items] |
Actual | 11.7
Minimum Requirement | 0.2
Cboe Fixed Income |
Regulatory Capital Requirement [Line Items] |
Actual | 2.4
Minimum Requirement | 0.1
Cboe Europe |
Regulatory Capital Requirement [Line Items] |
Actual | 71.2
Minimum Requirement | 36.6
Cboe Chi-X Europe |
Regulatory Capital Requirement [Line Items] |
Actual | 0.1
Minimum Requirement | 0.1
Cboe Clear Europe |
Regulatory Capital Requirement [Line Items] |
Actual | 128.1
Minimum Requirement | 76.0
CFE |
Regulatory Capital Requirement [Line Items] |
Actual | 104.5
Minimum Requirement | 40.3
Cboe SEF |
Regulatory Capital Requirement [Line Items] |
Actual | 10.8
Minimum Requirement | 2.5
Cboe Digital Exchange |
Regulatory Capital Requirement [Line Items] |
Actual | 21.6
Minimum Requirement | 0.0
Cboe Clear U.S. |
Regulatory Capital Requirement [Line Items] |
Actual | 35.1
Minimum Requirement | 12.1
Cboe Australia |
Regulatory Capital Requirement [Line Items] |
Actual | 17.9
Minimum Requirement | 5.9
Cboe Japan |
Regulatory Capital Requirement [Line Items] |
Actual | 6.8
Minimum Requirement | 4.6
Cboe NL |
Regulatory Capital Requirement [Line Items] |
Actual | 21.1
Minimum Requirement | $ 10.3

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