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Goodwill | 6 Months Ended
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Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Note 3. Goodwill Goodwill balances by reportable segment were as follows:
|  | Gross book value at December 31, 2024 |  |  | Accumulated impairment charges at December 31, 2024 |  |  | Net book value at December 31, 2024 |  |  | Foreign exchange adjustments |  |  | Net book value at June 30, 2025 |
Capital Markets - Software Solutions |  | $ | 99.9 |  |  | $ | — |  |  | $ | 99.9 |  |  | $ | 0.1 |  |  | $ | 100.0 |
Capital Markets - Compliance and Communications Management |  |  | 252.5 |  |  |  | — |  |  |  | 252.5 |  |  |  | 0.3 |  |  |  | 252.8 |
Investment Companies - Software Solutions |  |  | 53.0 |  |  |  | — |  |  |  | 53.0 |  |  |  | 0.1 |  |  |  | 53.1 |
Investment Companies - Compliance and Communications Management |  |  | 40.6 |  |  |  | (40.6 | ) |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 446.0 |  |  | $ | (40.6 | ) |  | $ | 405.4 |  |  | $ | 0.5 |  |  | $ | 405.9 |

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