Segment Information (Reconciliation of Assets from Segments to Consolidated) (Details) - USD ($) $ in Millions		Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Total assets		$ 22,926	$ 21,750
Investments	[1]	899	618
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Total assets		2,577	2,591
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Total assets		7,305	7,054
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Total assets		$ 12,145	$ 11,487

[1] Includes investments accounted for at fair value on a recurring basis of $788 million and $531 million as of June 30, 2021 and 2020, respectively (See Note 6—Fair Value).