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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Product Information [Line Items]          
REVENUES $ 13,598 $ 12,802 $ 26,798 $ 25,324  
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 2,779   2,779   $ 2,579
Other noncurrent assets 4,758   4,758   3,647
Equipment installment plan receivable          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 477   477   391
Other noncurrent assets 231   231   $ 189
Internet          
Product Information [Line Items]          
REVENUES 5,562 5,221 11,014 10,307  
Video          
Product Information [Line Items]          
REVENUES 4,484 4,378 8,830 8,722  
Voice          
Product Information [Line Items]          
REVENUES 398 394 789 793  
Residential revenue          
Product Information [Line Items]          
REVENUES 10,444 9,993 20,633 19,822  
Small and medium business          
Product Information [Line Items]          
REVENUES 1,080 1,042 2,139 2,054  
Enterprise          
Product Information [Line Items]          
REVENUES 669 636 1,330 1,274  
Commercial revenue          
Product Information [Line Items]          
REVENUES 1,749 1,678 3,469 3,328  
Advertising sales          
Product Information [Line Items]          
REVENUES 460 411 843 755  
Mobile          
Product Information [Line Items]          
REVENUES 726 519 1,416 1,011  
Other          
Product Information [Line Items]          
REVENUES $ 219 $ 201 $ 437 $ 408