Segment Information (Reconciliation of Assets from Segments to Consolidated) (Details) - USD ($) $ in Millions		Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total assets		$ 19,509	$ 13,121
Investments	[1]	865	275
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Total assets		2,584	2,430
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Total assets		6,598	6,805
Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Total assets		$ 9,462	$ 3,611

[1] Includes investments accounted for at fair value on a recurring basis of $761 million and $257 million as of June 30, 2019 and 2018, respectively (See Note 6—Fair Value). See Note 3—Acquisitions, Disposals and Other Transactions for information on recent investments.