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Accounts Payable and Accrued Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Accounts Payable and Accrued Liabilities [Abstract]    
Accounts payable – trade $ 686 $ 763
Deferred revenue 501 436
Accrued liabilities:    
Programming costs 2,106 1,940
Labor 1,235 1,374
Capital expenditures 1,123 1,227
Interest 1,067 1,083
Taxes and regulatory fees 638 555
Property and casualty 491 462
Operating lease liabilities 262 235
Other 1,132 792
Total accounts payable and accrued liabilities $ 9,241 $ 8,867