Segment Information - Reconciliation of Assets from Segments to Consolidated (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Jun. 30, 2023
Segment Reporting Information [Line Items]
Total assets	$ 22,846	$ 21,866
Investments	838	1,034
Cable Network Programming
Segment Reporting Information [Line Items]
Total assets	2,832	2,658
Television
Segment Reporting Information [Line Items]
Total assets	9,059	7,803
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Total assets	$ 10,117	$ 10,371