Segment and Revenue Information (Capital Expenditures) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Capital expenditures	$ 353	$ 352	$ 356
Operating Segments [Member] | TV Entertainment [Member]
Segment Reporting Information [Line Items]
Capital expenditures	113	112	134
Operating Segments [Member] | Cable Networks [Member]
Segment Reporting Information [Line Items]
Capital expenditures	166	156	156
Operating Segments [Member] | Filmed Entertainment [Member]
Segment Reporting Information [Line Items]
Capital expenditures	43	52	27
Operating Segments [Member] | Publishing [Member]
Segment Reporting Information [Line Items]
Capital expenditures	8	7	5
Corporate [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 23	$ 25	$ 34