Segment Information - Reconciliation of Assets from Segments to Consolidated (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023
Segment Reporting Information [Line Items]
Total assets	$ 21,649	$ 21,866
Investments	877	1,034
Cable Network Programming
Segment Reporting Information [Line Items]
Total assets	2,662	2,658
Television
Segment Reporting Information [Line Items]
Total assets	8,267	7,803
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Total assets	$ 9,843	$ 10,371