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Acquisitions, Disposals and Other Transactions (Detail)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Mar. 31, 2024
USD ($)
business
Mar. 31, 2023
USD ($)
business
Feb. 06, 2024
Business Acquisition [Line Items]          
Number of businesses acquired | business     0 0  
Deconsolidation, gain (loss), amount $ 167 $ 0 $ 167 $ 0  
ESPN And Warner Bros. Discovery Joint Venture          
Business Acquisition [Line Items]          
Joint venture, ownership percentage         33.33%
United Football League          
Business Acquisition [Line Items]          
Equity method investment, ownership percentage 42.00%   42.00%    
Disposal | United States Football League          
Business Acquisition [Line Items]          
Deconsolidation, gain (loss), amount $ 170   $ 170