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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Income Tax Contingency [Line Items]          
Income tax (benefit) expense $ (566) $ 36 $ (1,201) $ 144  
Non-cash deferred Income tax benefit   $ 151      
Unrecognized tax benefits 1,723   1,723   $ 420
Unrecognized tax benefits, decreases resulting from current period tax positions     261    
Unrecognized tax benefits, income tax penalties and interest accrued 334   334   $ 60
WarnerMedia          
Income Tax Contingency [Line Items]          
Unrecognized tax benefits 1,201   1,201    
Indemnification assets receivable 381   381    
Unrecognized tax benefits, income tax penalties and interest accrued $ 260   $ 260