Segment Information - Summary of Revenues by Segment by Component to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Revenues	$ 4,605	$ 4,441	$ 7,797	$ 7,486
Cable Network Programming
Disaggregation Of Revenue [Line Items]
Revenues	1,632	1,638	3,063	3,054
Cable Network Programming | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	1,026	1,039	2,055	2,065
Cable Network Programming | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	451	454	767	765
Cable Network Programming | Other
Disaggregation Of Revenue [Line Items]
Revenues	155	145	241	224
Television
Disaggregation Of Revenue [Line Items]
Revenues	2,934	2,759	4,648	4,340
Television | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	686	649	1,368	1,290
Television | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	2,052	1,954	2,957	2,773
Television | Other
Disaggregation Of Revenue [Line Items]
Revenues	196	156	323	277
Other, Corporate and Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	$ 39	$ 44	$ 86	$ 92