Programming and Other Inventory (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
TV Entertainment Segment [Member] | Operating Segments [Member] | Operating Expense [Member]
Segment Reporting Information [Line Items]
Programming charges	$ 66	$ 66
Cable Networks [Member] | Operating Segments [Member] | Operating Expense [Member]
Segment Reporting Information [Line Items]
Programming charges	50	50
Filmed Entertainment [Member] | Operating Segments [Member] | Operating Expense [Member]
Segment Reporting Information [Line Items]
Programming charges	5	5
COVID-19 [Member]
Segment Reporting Information [Line Items]
Programming charges	$ 121	$ 121