Segment Information (Reconciliation of Depreciation and Amortization from Segments to Consolidated and Reconciliation of Capital Expenditures from Segments to Consolidated) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 258	$ 212	$ 171
Capital expenditures	359	235	215
Operating Segments | Cable Network Programming Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	59	48	38
Capital expenditures	43	83	64
Operating Segments | Television Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	73	96	112
Capital expenditures	72	71	89
Operating Segments | Other, Corporate and Eliminations Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	126	68	21
Capital expenditures	$ 244	$ 81	$ 62