Segment Information - Summary of Revenues by Segment by Component to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Revenues	$ 4,234	$ 4,605	$ 7,441	$ 7,797
Cable Network Programming
Disaggregation Of Revenue [Line Items]
Revenues	1,658	1,632	3,045	3,063
Cable Network Programming | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	1,031	1,026	2,036	2,055
Cable Network Programming | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	348	451	638	767
Cable Network Programming | Other
Disaggregation Of Revenue [Line Items]
Revenues	279	155	371	241
Television
Disaggregation Of Revenue [Line Items]
Revenues	2,542	2,934	4,322	4,648
Television | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	756	686	1,491	1,368
Television | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	1,654	2,052	2,564	2,957
Television | Other
Disaggregation Of Revenue [Line Items]
Revenues	132	196	267	323
Other, Corporate and Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	$ 34	$ 39	$ 74	$ 86