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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Product Information [Line Items]          
REVENUES $ 13,659 $ 13,598 $ 27,312 $ 26,798  
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 2,864   2,864   $ 2,921
Other noncurrent assets 4,850   4,850   4,769
Equipment installment plan receivable          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 650   650   577
Other noncurrent assets 456   456   $ 261
Internet          
Product Information [Line Items]          
REVENUES 5,733 5,562 11,451 11,014  
Video          
Product Information [Line Items]          
REVENUES 4,188 4,484 8,442 8,830  
Voice          
Product Information [Line Items]          
REVENUES 365 398 738 789  
Mobile service          
Product Information [Line Items]          
REVENUES 539 415 1,036 802  
Residential revenue          
Product Information [Line Items]          
REVENUES 10,825 10,859 21,667 21,435  
Small and medium business          
Product Information [Line Items]          
REVENUES 1,094 1,092 2,185 2,162  
Enterprise          
Product Information [Line Items]          
REVENUES 690 669 1,372 1,330  
Commercial revenue          
Product Information [Line Items]          
REVENUES 1,784 1,761 3,557 3,492  
Advertising sales          
Product Information [Line Items]          
REVENUES 384 460 739 843  
Other          
Product Information [Line Items]          
REVENUES $ 666 $ 518 $ 1,349 $ 1,028