Deferred Revenue (Estimated Deferred Revenue) (Details) - USD ($) $ in Millions |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fiscal Year Ended [Abstract] | ||
| 2025 | $ 378 | |
| 2026 | 357 | |
| 2027 | 33 | |
| 2028 | 17 | |
| 2029 | 9 | |
| 2030+ | 7 | |
| Total | 801 | $ 788 |
| Initial Listings | ||
| Fiscal Year Ended [Abstract] | ||
| 2025 | 10 | |
| 2026 | 36 | |
| 2027 | 23 | |
| 2028 | 12 | |
| 2029 | 8 | |
| 2030+ | 7 | |
| Total | 96 | 89 |
| Annual Listings | ||
| Fiscal Year Ended [Abstract] | ||
| 2025 | 97 | |
| 2026 | 0 | |
| 2027 | 0 | |
| 2028 | 0 | |
| 2029 | 0 | |
| 2030+ | 0 | |
| Total | 97 | 2 |
| Workflow & Insights | ||
| Fiscal Year Ended [Abstract] | ||
| 2025 | 96 | |
| 2026 | 109 | |
| 2027 | 0 | |
| 2028 | 0 | |
| 2029 | 0 | |
| 2030+ | 0 | |
| Total | 205 | 194 |
| Other | ||
| Fiscal Year Ended [Abstract] | ||
| 2025 | 6 | |
| 2026 | 10 | |
| 2027 | 6 | |
| 2028 | 3 | |
| 2029 | 1 | |
| 2030+ | 0 | |
| Total | 26 | 22 |
| Financial Crime Management Technology | ||
| Fiscal Year Ended [Abstract] | ||
| 2025 | 68 | |
| 2026 | 77 | |
| 2027 | 1 | |
| 2028 | 1 | |
| 2029 | 0 | |
| 2030+ | 0 | |
| Total | 147 | 148 |
| Regulatory Technology | ||
| Fiscal Year Ended [Abstract] | ||
| 2025 | 49 | |
| 2026 | 70 | |
| 2027 | 0 | |
| 2028 | 0 | |
| 2029 | 0 | |
| 2030+ | 0 | |
| Total | 119 | 147 |
| Capital Markets Technology | ||
| Fiscal Year Ended [Abstract] | ||
| 2025 | 52 | |
| 2026 | 55 | |
| 2027 | 3 | |
| 2028 | 1 | |
| 2029 | 0 | |
| 2030+ | 0 | |
| Total | $ 111 | $ 186 |