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Schedule II: Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Valuation allowance $ 2,043 $ 2,191  
WarnerMedia      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Valuation allowance     $ 343
Allowance for credit losses      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning of Year 161 123 54
Additions 127 152 165
Deductions (127) (114) (96)
End of Year 161 161 123
Deferred tax valuation allowance      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning of Year 2,191 1,849 305
Additions 179 429 1,617
Deductions (327) (87) (73)
End of Year $ 2,043 $ 2,191 $ 1,849