Segment Information (Reconciliation of Goodwill and Intangible Assets, Net from Segments to Consolidated) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 6,589	$ 6,607
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	1,324	1,287
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	4,582	4,630
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 683	$ 690