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Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ 3,007 | $ 3,033 | $ 9,498 | $ 8,731
Transaction-based expenses | 596 | 684 | 2,071 | 1,775
Total revenues, less transaction-based expenses | 2,411 | 2,349 | 7,427 | 6,956
Other Expenses | 841 | 823 | 2,513 | 2,488
Depreciation and amortization | 387 | 386 | 1,171 | 1,148
Acquisition-related transaction and integration costs | 9 | 37 | 51 | 88
Total operating expenses | 1,237 | 1,246 | 3,735 | 3,724
Operating income/(loss) | 1,174 | 1,103 | 3,692 | 3,232
Total other income/(expense), net | (93) | (205) | (412) | (509)
Income before income tax expense | 1,081 | 898 | 3,280 | 2,723
Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 1,861 | 1,938 | 6,118 | 5,498
Transaction-based expenses | 596 | 684 | 2,071 | 1,775
Total revenues, less transaction-based expenses | 1,265 | 1,254 | 4,047 | 3,723
Other Expenses | 293 | 242 | 872 | 792
Depreciation and amortization | 64 | 65 | 191 | 197
Acquisition-related transaction and integration costs | 0 | 0 | 1 | 0
Total operating expenses | 357 | 307 | 1,064 | 989
Operating income/(loss) | 908 | 947 | 2,983 | 2,734
Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 618 | 586 | 1,811 | 1,719
Transaction-based expenses | 0 | 0 | 0 | 0
Total revenues, less transaction-based expenses | 618 | 586 | 1,811 | 1,719
Other Expenses | 286 | 294 | 850 | 844
Depreciation and amortization | 86 | 82 | 256 | 243
Acquisition-related transaction and integration costs | 2 | 0 | 2 | 0
Total operating expenses | 374 | 376 | 1,108 | 1,087
Operating income/(loss) | 244 | 210 | 703 | 632
Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 528 | 509 | 1,569 | 1,514
Transaction-based expenses | 0 | 0 | 0 | 0
Total revenues, less transaction-based expenses | 528 | 509 | 1,569 | 1,514
Other Expenses | 262 | 287 | 791 | 852
Depreciation and amortization | 237 | 239 | 724 | 708
Acquisition-related transaction and integration costs | 7 | 37 | 48 | 88
Total operating expenses | 506 | 563 | 1,563 | 1,648
Operating income/(loss) | 22 | (54) | 6 | (134)
Energy futures and options |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 482 | 473 | 1,634 | 1,399
Energy futures and options | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 482 | 473 | 1,634 | 1,399
Energy futures and options | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Energy futures and options | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Agricultural and metals futures and options |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 51 | 60 | 180 | 203
Agricultural and metals futures and options | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 51 | 60 | 180 | 203
Agricultural and metals futures and options | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Agricultural and metals futures and options | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Financial futures and options |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 139 | 141 | 453 | 408
Financial futures and options | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 139 | 141 | 453 | 408
Financial futures and options | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Financial futures and options | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Cash equities and equity options |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 701 | 791 | 2,418 | 2,092
Cash equities and equity options | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 701 | 791 | 2,418 | 2,092
Cash equities and equity options | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Cash equities and equity options | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
OTC and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 99 | 109 | 298 | 313
OTC and other | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 99 | 109 | 298 | 313
OTC and other | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
OTC and other | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Data and connectivity services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 264 | 242 | 765 | 717
Data and connectivity services | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 264 | 242 | 765 | 717
Data and connectivity services | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Data and connectivity services | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Listings |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 125 | 122 | 370 | 366
Listings | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 125 | 122 | 370 | 366
Listings | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Listings | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Fixed income execution |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 33 | 28 | 96 | 84
Fixed income execution | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Fixed income execution | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 33 | 28 | 96 | 84
Fixed income execution | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
CDS clearing |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 90 | 97 | 266 | 268
CDS clearing | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
CDS clearing | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 90 | 97 | 266 | 268
CDS clearing | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Fixed income data and analytics |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 311 | 295 | 916 | 876
Fixed income data and analytics | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Fixed income data and analytics | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 311 | 295 | 916 | 876
Fixed income data and analytics | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Data and network technology |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 184 | 166 | 533 | 491
Data and network technology | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Data and network technology | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 184 | 166 | 533 | 491
Data and network technology | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Origination technology |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 188 | 182 | 550 | 536
Origination technology | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Origination technology | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Origination technology | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 188 | 182 | 550 | 536
Closing solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 58 | 54 | 163 | 150
Closing solutions | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Closing solutions | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Closing solutions | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 58 | 54 | 163 | 150
Servicing software |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 216 | 209 | 657 | 635
Servicing software | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Servicing software | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Servicing software | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 216 | 209 | 657 | 635
Data and analytics |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 66 | 64 | 199 | 193
Data and analytics | Exchanges Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Data and analytics | Fixed Income and Data Services Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Data and analytics | Mortgage Technology Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ 66 | $ 64 | $ 199 | $ 193

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