Program Rights and Obligations (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Film, Disclosures [Abstract]
Owned original programming amortization period	3 years
Percentage of film costs amortized in the next three years	88.00%
Percentage of license program costs amortized in the next three years	93.00%
Programming costs to be amortized in next twelve months	$ 115.1
Program rights write offs	$ 108.3	$ 40.9	$ 50.5