Segment Information - Schedule of Reconciliation of Assets from Segments to Consolidated (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024
Segment Reporting Information [Line Items]
Total assets	$ 22,538	$ 21,972
Investments	1,355	1,129
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	9,805	10,090
Cable Network Programming | Operating Segments
Segment Reporting Information [Line Items]
Total assets	2,915	2,792
Television | Operating Segments
Segment Reporting Information [Line Items]
Total assets	$ 8,463	$ 7,961