Segment Information (Reconciliation of Goodwill and Intangible Assets, Net from Segments to Consolidated) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jun. 30, 2019
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 5,902	$ 5,542
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	1,286	1,246
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	3,922	3,891
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 694	$ 405