Segment Information (Reconciliation of Goodwill and Intangible Assets, Net from Segments to Consolidated) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 5,542	$ 5,613
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	1,246	1,184
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	3,891	4,024
Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 405	$ 405