Program Rights (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Film Disclosure [Line Items]
Program rights write-offs	$ 0.0	$ 0.0
Prepaid expenses and other current assets
Film Disclosure [Line Items]
Income tax receivable, program rights		$ 155.2	$ 143.1
Other Noncurrent Assets
Film Disclosure [Line Items]
Income tax receivable, program rights	$ 119.4		$ 104.5