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Intangible Assets and Goodwill | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets and Goodwill | 6. Intangible Assets and Goodwill Intangible Assets, Net Intangible assets, net consisted of the following:
(in millions) |  | Indefinite- lived trade names |  |  | Customer relationship intangibles |  |  | Definite- lived trade names |  |  | Acquired Technology |  |  | Acquired Content |  |  | Computer software |  |  | Capitalized software in progress |  |  | Total Intangible Assets |
Gross carrying amount at September 30, 2025 |  | $ | 45.7 |  |  | $ | 394.4 |  |  | $ | 112.1 |  |  | $ | 8.4 |  |  | $ | 2.6 |  |  | $ | 51.6 |  |  | $ | 1.7 |  |  | $ | 616.5 |
Accumulated amortization |  |  | — |  |  |  | (352.9 | ) |  |  | (32.5 | ) |  |  | (6.3 | ) |  |  | (1.8 | ) |  |  | (32.4 | ) |  |  | — |  |  |  | (425.9 | )
Net carrying amount at September 30, 2025 |  | $ | 45.7 |  |  | $ | 41.5 |  |  | $ | 79.6 |  |  | $ | 2.1 |  |  | $ | 0.8 |  |  | $ | 19.2 |  |  | $ | 1.7 |  |  | $ | 190.6 |
Gross carrying amount at December 31, 2024 |  | $ | 45.7 |  |  | $ | 363.6 |  |  | $ | 92.3 |  |  | $ | 8.4 |  |  | $ | 2.6 |  |  | $ | 45.1 |  |  | $ | 2.3 |  |  | $ | 560.0 |
Accumulated amortization |  |  | — |  |  |  | (343.5 | ) |  |  | (27.6 | ) |  |  | (5.7 | ) |  |  | (1.4 | ) |  |  | (25.9 | ) |  |  | — |  |  |  | (404.1 | )
Net carrying amount at December 31, 2024 |  | $ | 45.7 |  |  | $ | 20.1 |  |  | $ | 64.7 |  |  | $ | 2.7 |  |  | $ | 1.2 |  |  | $ | 19.2 |  |  | $ | 2.3 |  |  | $ | 155.9 |
Amortization expense for the three and nine months ended September 30, 2025 was $8.4 million and $22.0 million, respectively. Amortization expense for the three and nine months ended September 30, 2024 was $6.8 million and $20.4 million, respectively. Impairment of Indefinite-Lived Intangible Assets During the three months ended September 30, 2024, the Company identified an interim impairment trigger for two of its indefinite-lived intangible assets due to the cancellation of certain events that were not contributing to profitability. As a result, the Company performed a quantitative analysis utilizing the “relief from royalty payments” method with assumptions that are considered level 3 inputs. As a result of performing the interim impairment assessment, the Company recognized impairment charges of $6.3 million to certain indefinite-lived trade name intangible assets during the three and nine months ended September 30, 2024 related to the Connections reportable segment. The impairment charges are recorded in intangible asset impairment charges on the condensed consolidated statements of loss. Goodwill The table below summarizes the changes in the carrying amount of goodwill for each reportable segment:
|  | Reportable Segment |  |  |  |  |  |  |
(in millions) |  | Connections |  |  | All Other |  |  | Total |
Balance at December 31, 2024 |  | $ | 538.2 |  |  | $ | 35.6 |  |  | $ | 573.8 |
Acquired goodwill |  |  | 205.8 |  |  |  | — |  |  |  | 205.8 |
Foreign currency translation |  |  | 1.8 |  |  |  | — |  |  |  | 1.8 |
Balance at September 30, 2025 |  | $ | 745.8 |  |  | $ | 35.6 |  |  | $ | 781.4 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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