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Dispositions - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Nov. 14, 2024
Dec. 28, 2024
Sep. 28, 2024
Sep. 30, 2023
Oct. 01, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Goodwill, Impairment Loss [1]     $ 2,622 $ 721  
Star India          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Goodwill, Impairment Loss     1,545 $ 0 $ 0
Goodwill, Foreign Currency Translation Gain (Loss)     $ 800    
Star India | Subsequent Event          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Disposal Group, Not Discontinued Operation, Equity Method Investment Retained After Disposal, Ownership Interest After Disposal 37.00%        
Star India | Subsequent Event | Scenario, Plan          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Non-cash Tax Charge   $ 300      
Equity Interest Held by RIL | Star India | Subsequent Event          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Equity Method Investment, Ownership Interest 56.00%        
Equity Interest Held by Bodhi Tree Systems | Star India | Subsequent Event          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Equity Method Investment, Ownership Interest 7.00%        
[1] Current year reflects impairments related to entertainment linear networks and Star India (see Note 18). Prior year reflects impairments at entertainment and international sports linear networks (see Note 18).