Segment Information - Schedule of Revenues by Segment by Component to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Disaggregation Of Revenue [Line Items]
Revenues	$ 3,564	$ 3,207
Corporate and Other
Disaggregation Of Revenue [Line Items]
Revenues	65	54
Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	(51)	(14)
Cable Network Programming | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	1,597	1,387
Cable Network Programming | Affiliate fee | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	1,037	1,005
Cable Network Programming | Advertising | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	321	290
Cable Network Programming | Other | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	239	92
Television | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	1,953	1,780
Television | Affiliate fee | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	806	735
Television | Advertising | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	1,008	910
Television | Other | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	$ 139	$ 135