Segment and Revenue Information (Revenues) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 4,167	$ 3,761
Operating Segments [Member] | Entertainment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,176	2,753
Operating Segments [Member] | Cable Networks [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	552	571
Operating Segments [Member] | Publishing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	164	160
Operating Segments [Member] | Local Media [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	457	415
Corporate and Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(182)	(138)
Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(189)	(144)
Intersegment Eliminations [Member] | Entertainment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(183)	(139)
Intersegment Eliminations [Member] | Cable Networks [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	(1)	0
Intersegment Eliminations [Member] | Local Media [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ (5)	$ (5)