Segment Information - Summary of Revenues by Segment by Component to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenues	$ 14,913	$ 13,974	$ 12,909
Cable Network Programming
Disaggregation Of Revenue [Line Items]
Revenues	6,043	6,097	5,683
Cable Network Programming | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	4,175	4,205	3,995
Cable Network Programming | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	1,403	1,462	1,337
Cable Network Programming | Other
Disaggregation Of Revenue [Line Items]
Revenues	465	430	351
Television
Disaggregation Of Revenue [Line Items]
Revenues	8,710	7,685	7,048
Television | Affiliate fee
Disaggregation Of Revenue [Line Items]
Revenues	2,876	2,673	2,440
Television | Advertising
Disaggregation Of Revenue [Line Items]
Revenues	5,204	4,440	4,094
Television | Other
Disaggregation Of Revenue [Line Items]
Revenues	630	572	514
Other, Corporate and Eliminations
Disaggregation Of Revenue [Line Items]
Revenues	$ 160	$ 192	$ 178