Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Product Information [Line Items]
REVENUES	$ 11,347	$ 10,854	$ 22,553	$ 21,511
Video [Member]
Product Information [Line Items]
REVENUES	4,391	4,363	8,775	8,655
Internet [Member]
Product Information [Line Items]
REVENUES	4,103	3,770	8,127	7,477
Voice [Member]
Product Information [Line Items]
REVENUES	489	531	993	1,087
Residential revenue [Member]
Product Information [Line Items]
REVENUES	8,983	8,664	17,895	17,219
Small and Medium Business [Member]
Product Information [Line Items]
REVENUES	963	915	1,908	1,815
Enterprise [Member]
Product Information [Line Items]
REVENUES	652	627	1,295	1,249
Commercial revenue [Member]
Product Information [Line Items]
REVENUES	1,615	1,542	3,203	3,064
Advertising sales [Member]
Product Information [Line Items]
REVENUES	395	427	740	783
Mobile [Member]
Product Information [Line Items]
REVENUES	158	0	298	0
Other services [Member]
Product Information [Line Items]
REVENUES	$ 196	$ 221	$ 417	$ 445