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Revenue (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
Product Information [Line Items]          
REVENUES $ 13,550 $ 13,146 $ 40,348 $ 38,470  
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 2,841   2,841   $ 2,579
Other noncurrent assets 4,911   4,911   3,647
Equipment installment plan receivable          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 492   492   391
Other noncurrent assets 225   225   $ 189
Internet          
Product Information [Line Items]          
REVENUES 5,571 5,363 16,585 15,670  
Video          
Product Information [Line Items]          
REVENUES 4,379 4,502 13,209 13,224  
Voice          
Product Information [Line Items]          
REVENUES 391 409 1,180 1,202  
Residential revenue          
Product Information [Line Items]          
REVENUES 10,341 10,274 30,974 30,096  
Small and medium business          
Product Information [Line Items]          
REVENUES 1,082 1,062 3,221 3,116  
Enterprise          
Product Information [Line Items]          
REVENUES 673 656 2,003 1,930  
Commercial revenue          
Product Information [Line Items]          
REVENUES 1,755 1,718 5,224 5,046  
Advertising sales          
Product Information [Line Items]          
REVENUES 481 391 1,324 1,146  
Mobile          
Product Information [Line Items]          
REVENUES 750 535 2,166 1,546  
Other          
Product Information [Line Items]          
REVENUES $ 223 $ 228 $ 660 $ 636