Segment Information - Summary of Revenues by Segment by Component to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Revenues	$ 3,455	$ 3,215	$ 10,941	$ 10,019
Operating Segments | Cable Network Programming
Disaggregation Of Revenue [Line Items]
Revenues	1,583	1,471	4,637	4,284
Operating Segments | Cable Network Programming | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	1,097	1,068	3,162	2,969
Operating Segments | Cable Network Programming | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	339	283	1,104	1,023
Operating Segments | Cable Network Programming | Other
Disaggregation Of Revenue [Line Items]
Revenues	147	120	371	292
Operating Segments | Television
Disaggregation Of Revenue [Line Items]
Revenues	1,820	1,695	6,160	5,601
Operating Segments | Television | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	700	651	1,990	1,801
Operating Segments | Television | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	969	915	3,742	3,426
Operating Segments | Television | Other
Disaggregation Of Revenue [Line Items]
Revenues	151	129	428	374
Operating Segments | Other, Corporate and Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	$ 52	$ 49	$ 144	$ 134