Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable – trade	$ 663	$ 758
Deferred revenue	526	494
Accrued liabilities:
Programming costs	2,064	2,044
Labor	1,005	1,052
Capital expenditures	973	1,472
Interest	943	1,045
Taxes and regulatory fees	575	526
Property and casualty	464	424
Other	1,050	990
Total accounts payable and accrued liabilities	$ 8,263	$ 8,805