Segment Information - Schedule of Reconciliation of Assets from Segments to Consolidated (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
Segment Reporting Information [Line Items]
Total assets	$ 23,022	$ 21,972
Investments	1,517	1,129
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	8,864	10,090
Cable Network Programming | Operating Segments
Segment Reporting Information [Line Items]
Total assets	3,105	2,792
Television | Operating Segments
Segment Reporting Information [Line Items]
Total assets	$ 9,536	$ 7,961