Segment Information (Reconciliation of Revenues and Segment EBITDA from Segments to Consolidated) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 2,752	$ 2,463	$ 8,876	$ 7,759
Total Segment EBITDA	766	706	1,972	1,852
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Revenues	1,383	1,325	4,082	3,778
Total Segment EBITDA	741	692	1,893	1,730
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Revenues	1,370	1,138	4,796	3,982
Total Segment EBITDA	99	81	256	268
Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Revenues	(1)	0	(2)	(1)
Total Segment EBITDA	$ (74)	$ (67)	$ (177)	$ (146)