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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Product Information [Line Items]          
REVENUES $ 13,685 $ 13,659 $ 27,364 $ 27,312  
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 3,000   3,000   $ 2,965
Other noncurrent assets 4,791   4,791   4,732
Equipment installment plan receivable          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Accounts receivable, net 803   803   673
Other noncurrent assets 854   854   $ 687
Internet          
Product Information [Line Items]          
REVENUES 5,806 5,733 11,632 11,451  
Video          
Product Information [Line Items]          
REVENUES 3,867 4,188 7,775 8,442  
Voice          
Product Information [Line Items]          
REVENUES 350 365 724 738  
Mobile service          
Product Information [Line Items]          
REVENUES 737 539 1,422 1,036  
Residential revenue          
Product Information [Line Items]          
REVENUES 10,760 10,825 21,553 21,667  
Small and medium business          
Product Information [Line Items]          
REVENUES 1,101 1,094 2,189 2,185  
Enterprise          
Product Information [Line Items]          
REVENUES 721 690 1,429 1,372  
Commercial revenue          
Product Information [Line Items]          
REVENUES 1,822 1,784 3,618 3,557  
Advertising sales          
Product Information [Line Items]          
REVENUES 397 384 788 739  
Other          
Product Information [Line Items]          
REVENUES $ 706 $ 666 $ 1,405 $ 1,349