Reportable Segments (Depreciation and Amortization) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 56	$ 57	$ 111	$ 114
Operating Segments [Member] | Entertainment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	27	30	56	60
Operating Segments [Member] | Cable Networks [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	6	5	12	11
Operating Segments [Member] | Publishing [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	2	2	3	3
Operating Segments [Member] | Local Media [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	12	11	23	22
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 9	$ 9	$ 17	$ 18