Organization and Summary of Significant Accounting Policies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 01, 2014
Description of Business
Business Acquisition, Effective Date of Acquisition	Oct. 31, 2014								Oct. 31, 2014
IP Equipment												$ 222
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income									90
Period company may receive up front payments for services to be provided in the future (in years)									25
USF contributions									234	194	191
Bad debt expense									22	17	15
Net Income (Loss)	66	85	51	112	14	(21)	(24)	(78)	314	(109)	(422)
Capitalized labor and related costs associated with employee and contract labor working on capital projects									187	164	146
Impairment of Intangible Assets (Excluding Goodwill)									17
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Basic Earnings Per Share									$ 0.35
Network Access Costs	695	607	613	614	618	608	616	629	2,529	2,471	2,602
Network Related Expenses	345	307	302	292	298	314	300	302	1,246	1,214	1,249
Selling, General and Administrative Expenses	393	266	267	255	263	292	310	297	1,181	1,162	1,201
Total Costs and Expenses	1,683	1,367	1,369	1,345	1,383	1,417	1,425	1,422	5,764	5,647	5,801
Racks and Cabinets												114
Facility Equipment												151
Fixtures and Equipment, Gross												487
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Diluted Earnings Per Share									$ 0.35
Sales Revenue | Customer Concentration Risk
Description of Business
Percentage of communications revenue from top ten customers									17.00%	17.00%	17.00%
Minimum [Member]
Description of Business
Finite-lived intangible assets, useful life, minimum (in years)									4 years
Minimum [Member] | Facility and Leasehold Improvements
Description of Business
Property, plant and equipment, useful life, minimum (in years)									15 years
Minimum [Member] | Network infrastructure (including fiber and conduit)
Description of Business
Property, plant and equipment, useful life, minimum (in years)									25 years
Minimum [Member] | Operating Equipment
Description of Business
Property, plant and equipment, useful life, minimum (in years)									5 years
Minimum [Member] | Office Equipment [Member]
Description of Business
Property, plant and equipment, useful life, minimum (in years)									3 years
Minimum [Member] | Expansion and improvements of communications network and customer installations
Description of Business
Property, plant and equipment, useful life, minimum (in years)									3 years
Maximum
Description of Business
Finite-lived intangible assets, useful life, minimum (in years)									12 years
Maximum | Facility and Leasehold Improvements
Description of Business
Property, plant and equipment, useful life, minimum (in years)									40 years
Maximum | Network infrastructure (including fiber and conduit)
Description of Business
Property, plant and equipment, useful life, minimum (in years)									50 years
Maximum | Operating Equipment
Description of Business
Property, plant and equipment, useful life, minimum (in years)									15 years
Maximum | Office Equipment [Member]
Description of Business
Property, plant and equipment, useful life, minimum (in years)									7 years
Maximum | Expansion and improvements of communications network and customer installations
Description of Business
Property, plant and equipment, useful life, minimum (in years)									7 years
Maximum | Software development
Description of Business
Property, plant and equipment, useful life, minimum (in years)									3 years
Scenario, Previously Reported [Member]
Description of Business
Cost of Revenue										2,471	2,602
Network Access Costs										0	0
Network Related Expenses										0	0
Selling, General and Administrative Expenses										2,376	2,450
Total Costs and Expenses										5,647	5,801
Restatement Adjustment [Member]
Description of Business
Cost of Revenue										(2,471)	(2,602)
Network Access Costs										2,471	2,602
Network Related Expenses										1,214	1,249
Selling, General and Administrative Expenses										(1,214)	(1,249)
Total Costs and Expenses										0	0
As Restated [Member]
Description of Business
Cost of Revenue										0	0
Network Access Costs										2,471	2,602
Network Related Expenses										1,214	1,249
Selling, General and Administrative Expenses										1,162	1,201
Total Costs and Expenses										$ 5,647	$ 5,801