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Program Rights (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Film Disclosure [Line Items] |  |  |  |  |
Program rights write-offs | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 |
Prepaid expenses and other current assets |  |  |  |  |
Film Disclosure [Line Items] |  |  |  |  |
Income tax receivable, program rights |  |  | 191.7 |  | $ 143.1
Other noncurrent assets |  |  |  |  |
Film Disclosure [Line Items] |  |  |  |  |
Income tax receivable, program rights |  |  | $ 84.6 |  | $ 104.5

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