Segment Information - Schedule of Revenues by Segment by Component to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Disaggregation Of Revenue [Line Items]
Revenues	$ 4,371	$ 3,447	$ 13,013	$ 10,888
Corporate and Other
Disaggregation Of Revenue [Line Items]
Revenues	58	53	181	156
Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	(27)	(16)	(184)	(45)
Cable Network Programming \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	1,636	1,472	5,398	4,517
Cable Network Programming \| Affiliate fee \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	1,135	1,104	3,248	3,140
Cable Network Programming \| Advertising \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	372	296	1,153	934
Cable Network Programming \| Other \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	129	72	997	443
Television \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	2,704	1,938	7,618	6,260
Television \| Affiliate fee \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	870	834	2,500	2,325
Television \| Advertising \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	1,664	939	4,634	3,503
Television \| Other \| Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	$ 170	$ 165	$ 484	$ 432