Segment Information - Schedule of Revenues by Segment by Component to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Disaggregation Of Revenue [Line Items]
Revenues	$ 3,447	$ 4,084	$ 10,888	$ 11,881
Cable Network Programming
Disaggregation Of Revenue [Line Items]
Revenues	1,472	1,570	4,517	4,633
Cable Network Programming | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	1,104	1,093	3,140	3,148
Cable Network Programming | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	296	316	934	1,083
Cable Network Programming | Other
Disaggregation Of Revenue [Line Items]
Revenues	72	161	443	402
Television
Disaggregation Of Revenue [Line Items]
Revenues	1,938	2,475	6,260	7,123
Television | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	834	764	2,325	2,132
Television | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	939	1,559	3,503	4,516
Television | Other
Disaggregation Of Revenue [Line Items]
Revenues	165	152	432	475
Other, Corporate and Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	$ 37	$ 39	$ 111	$ 125