Segment Information (Details 2) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) category	Jun. 30, 2015 USD ($)
Operating revenues by products and services
Number of categories of products and services (categories) | category			4
Revenues	$ 4,398	$ 4,419	$ 8,799	$ 8,870
Surcharge amount on customers' bills	144	139	$ 291	274
Individual customers accounting for more than 10% of total operating revenues			We do not have any single customer that provides more than 10% of our total consolidated operating revenues.
Strategic services
Operating revenues by products and services
Revenues	$ 2,030	1,929	$ 4,019	3,832
Facilities-based video services
Operating revenues by products and services
Number of markets	16		16
Legacy services
Operating revenues by products and services
Revenues	$ 1,938	2,089	$ 3,926	4,240
Data integration
Operating revenues by products and services
Revenues	123	143	239	283
Other revenues
Operating revenues by products and services
Revenues	307	258	615	515
High cost support revenue
Operating revenues by products and services
Revenues	173	132	347	266
Other revenue
Operating revenues by products and services
Revenues	134	126	268	249
Business
Operating revenues by products and services
Revenues	2,597	2,658	5,201	5,355
Business | Business high-bandwidth data services
Operating revenues by products and services
Revenues	753	697	1,491	1,384
Business | Business hosting services
Operating revenues by products and services
Revenues	305	319	612	637
Business | Other business strategic services
Operating revenues by products and services
Revenues	172	155	342	315
Business | Voice services
Operating revenues by products and services
Revenues	611	648	1,233	1,318
Business | Business low-bandwidth data services
Operating revenues by products and services
Revenues	352	403	718	822
Business | Other business legacy services
Operating revenues by products and services
Revenues	281	293	567	597
Business | Data integration
Operating revenues by products and services
Revenues	123	143	238	282
Consumer
Operating revenues by products and services
Revenues	1,494	1,503	2,983	3,000
Consumer | Consumer broadband services
Operating revenues by products and services
Revenues	682	652	1,349	1,287
Consumer | Other consumer strategic services
Operating revenues by products and services
Revenues	118	106	225	209
Consumer | Voice services
Operating revenues by products and services
Revenues	615	675	1,249	1,363
Consumer | Other consumer legacy services
Operating revenues by products and services
Revenues	79	70	159	140
Consumer | Data integration
Operating revenues by products and services
Revenues	$ 0	0	$ 1	1
Business low-bandwidth data services | Restatement adjustment | Business | Strategic services
Operating revenues by products and services
Revenues		(401)		(818)
Business low-bandwidth data services | Restatement adjustment | Business | Legacy services
Operating revenues by products and services
Revenues		401		818
Other business strategic services | Restatement adjustment | Business | Strategic services
Operating revenues by products and services
Revenues		2		4
Other business legacy services | Restatement adjustment | Business | Legacy services
Operating revenues by products and services
Revenues		$ (2)		$ (4)