v3.25.4

Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 01, 2025 | Dec. 01, 2024 | Dec. 01, 2023 | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Accumulated impairment charges |  |  |  |  |  |  | $ 649,600,000 | $ 556,200,000 |
Impairment charge related to goodwill |  |  |  | $ 68,000,000 |  |  | 93,384,000 | 370,698,000 |
Remaining goodwill eliminated upon sale of interest |  |  | $ 2,400,000 |  |  |  |  |  |
Aggregate amortization expense for amortizable intangible assets |  |  |  |  |  |  | 31,000,000.0 | 33,900,000 | $ 40,500,000
Impairment charges for indefinite-lived intangible assets | $ 4,400,000 |  |  |  |  |  |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] | Impairment and other charges |  |  |  |  |  |  |  |
Impairment charges for long-lived assets |  |  |  |  |  |  | 0 |  |
AMCNI Reporting Unit |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Impairment charge related to goodwill | $ 93,400,000 | $ 34,000,000 |  |  |  |  |  |  |
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] | Impairment and other charges |  |  |  |  |  |  |  |
Domestic Operations |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Impairment charge related to goodwill |  | $ 268,700,000 |  |  |  |  |  |  |
Reporting unit exceeded its respective carrying value percentage | 6.00% |  |  |  |  |  |  |  |
BBC America |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Impairment charges for long-lived assets |  |  |  |  |  |  |  | 71,600,000 | 71,600,000
25/7 Media |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Impairment charges for long-lived assets |  |  |  |  |  |  |  | 23,000,000 | $ 23,000,000
Domestic Operations |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Accumulated impairment charges |  |  |  |  |  |  | 268,700,000 | 268,700,000 |
Impairment charge related to goodwill |  |  |  |  |  |  | 0 | 268,694,000 |
Impairment charges for long-lived assets |  |  |  | 13,500,000 |  |  |  |  |
Impairment of identifiable intangible assets |  |  |  | $ 15,700,000 | $ 42,400,000 |  |  |  |
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  | Impairment and other charges |  |  |  |
International |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Accumulated impairment charges |  |  |  |  |  |  | 380,900,000 | 287,500,000 |
Impairment charge related to goodwill |  |  |  |  |  | $ 1,900,000 | $ 93,384,000 | $ 102,004,000 |
Impairment of identifiable intangible assets |  |  |  |  |  | $ 23,000,000 |  |  |
International | 25/7 Media |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Impairment charge related to goodwill |  |  | $ 19,800,000 |  |  |  |  |  |

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