Segment Information (Details 2) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) category	Mar. 31, 2015 USD ($)
Operating revenues by products and services
Number of categories of products and services (categories) | category	4
OPERATING REVENUES	$ 4,401	$ 4,451
Surcharge amount on customers' bills	146	135
Strategic services
Operating revenues by products and services
OPERATING REVENUES	$ 2,354	2,320
Facilities-based video services
Operating revenues by products and services
Number of markets	16
Legacy services
Operating revenues by products and services
OPERATING REVENUES	$ 1,623	1,734
Data integration
Operating revenues by products and services
OPERATING REVENUES	116	140
Other revenues
Operating revenues by products and services
OPERATING REVENUES	308	257
High cost support revenue
Operating revenues by products and services
OPERATING REVENUES	174	134
Other revenue
Operating revenues by products and services
OPERATING REVENUES	134	123
Business
Operating revenues by products and services
OPERATING REVENUES	2,604	2,697
Business | Business high-bandwidth data services
Operating revenues by products and services
OPERATING REVENUES	738	687
Business | Business low-bandwidth data services
Operating revenues by products and services
OPERATING REVENUES	481	532
Business | Business hosting services
Operating revenues by products and services
OPERATING REVENUES	307	318
Business | Other business strategic services
Operating revenues by products and services
OPERATING REVENUES	54	45
Business | Voice services
Operating revenues by products and services
OPERATING REVENUES	622	670
Business | Other business legacy services
Operating revenues by products and services
OPERATING REVENUES	287	306
Business | Data integration
Operating revenues by products and services
OPERATING REVENUES	115	139
Consumer
Operating revenues by products and services
OPERATING REVENUES	1,489	1,497
Consumer | Consumer high-speed Internet services
Operating revenues by products and services
OPERATING REVENUES	667	635
Consumer | Other consumer strategic services
Operating revenues by products and services
OPERATING REVENUES	107	103
Consumer | Voice services
Operating revenues by products and services
OPERATING REVENUES	634	688
Consumer | Other consumer legacy services
Operating revenues by products and services
OPERATING REVENUES	80	70
Consumer | Data integration
Operating revenues by products and services
OPERATING REVENUES	$ 1	$ 1