Operating Costs and Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Costs and Expenses [Abstract]
Programming	$ 11,290	$ 11,124	$ 10,596
Regulatory, connectivity and produced content	2,366	2,210	2,064
Costs to service customers	7,277	7,327	7,235
Marketing	3,044	3,042	3,036
Mobile	1,246	346	0
Other	4,001	3,811	3,610
Operating costs and expenses	$ 29,224	$ 27,860	$ 26,541