Segment Information - Summary of Revenues by Segment by Component to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Revenues	$ 3,045	$ 2,717
Operating Segments | Cable Network Programming
Disaggregation Of Revenue [Line Items]
Revenues	1,416	1,325
Operating Segments | Cable Network Programming | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	1,026	973
Operating Segments | Cable Network Programming | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	311	299
Operating Segments | Cable Network Programming | Other
Disaggregation Of Revenue [Line Items]
Revenues	79	53
Operating Segments | Television
Disaggregation Of Revenue [Line Items]
Revenues	1,581	1,350
Operating Segments | Television | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	641	560
Operating Segments | Television | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	819	670
Operating Segments | Television | Other
Disaggregation Of Revenue [Line Items]
Revenues	121	120
Operating Segments | Other, Corporate and Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	$ 48	$ 42