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v3.25.3

Commitments and Contingencies - Narrative (Details) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Feb. 02, 2021 plaintiff | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Period of lease extension options |  | 12 years |  | 12 years |
Total estimated future lease payments |  | $ 99 |  | $ 99 |
Revenue |  | $ 3,888 | $ 3,575 | $ 11,420 | $ 10,616
Basis Capital Investment Group, Investment Losses on Collateralized Debt Obligations |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of entities | plaintiff | 2 |  |  |  |
CME Group |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Noncontrolling interest ownership by noncontrolling owners percentage |  | 27.00% |  | 27.00% |
S&P DJ Indices | CME Group |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Noncontrolling interest ownership by noncontrolling owners percentage |  | 27.00% |  | 27.00% |
S&P DJ Indices | Related Party |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Revenue |  | $ 44 | $ 50 | $ 146 | $ 146
Minimum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Remaining lease terms |  | 1 year |  | 1 year |
Lease term |  | 1 year |  | 1 year |
Maximum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Remaining lease terms |  | 12 years |  | 12 years |
Lease term |  | 12 years |  | 12 years |

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