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Commitments and Contingencies - Narrative (Details) $ in Millions |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 03, 2024 USD ($) | Feb. 02, 2021 entity | Mar. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |
Option to extend lease period (in years) |  |  |  | 12 years |  |
Lease impairment charges |  |  |  | $ 3 | $ 26 | $ 132
Revenue |  |  |  | $ 14,208 | 12,497 | 11,181
Loss contingency accrual, payments | $ 20 |  |  |  |  |
Amazon Web Services |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Collaborative arrangement, purchase obligation |  |  | $ 1,000 |  |  |
Collaborative arrangement, contractual period (in years) |  |  | 5 years |  |  |
Basis Capital Investment Group, Investment Losses on Collateralized Debt Obligations |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss contingency, number of plaintiffs | entity |  | 2 |  |  |  |
CME Group |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Noncontrolling interest ownership by noncontrolling owners (as a percent) |  |  |  | 27.00% |  |
S&P/DJ Indices | CME Group |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Noncontrolling interest ownership by noncontrolling owners (as a percent) |  |  |  | 27.00% |  |
S&P/DJ Indices | Related Party |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Revenue |  |  |  | $ 192 | $ 174 | $ 170
Minimum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Remaining lease terms (in years) |  |  |  | 1 year |  |
Maximum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Remaining lease terms (in years) |  |  |  | 11 years |  |

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