Segment Information (Reconciliation of Goodwill and Intangible Assets, Net from Segments to Consolidated) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 6,173	$ 5,542
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	1,288	1,246
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	4,193	3,891
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Goodwill and intangible assets, net	$ 692	$ 405