Segment Information - Schedule of Reconciliation of Assets from Segments to Consolidated (Details) - USD ($) $ in Millions	Dec. 31, 2025	Jun. 30, 2025
Segment Reporting Information [Line Items]
Total assets	$ 21,471	$ 23,195
Investments	1,489	1,621
Operating Segments | Cable Network Programming
Segment Reporting Information [Line Items]
Total assets	3,138	2,895
Operating Segments | Television
Segment Reporting Information [Line Items]
Total assets	9,432	7,924
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	$ 7,412	$ 10,755