Segment Information (Segment Financial Information) (Details) (USD $)	12 Months Ended	3 Months Ended					6 Months Ended	12 Months Ended					3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended		6 Months Ended				0 Months Ended	3 Months Ended						6 Months Ended			12 Months Ended				6 Months Ended	12 Months Ended		6 Months Ended	12 Months Ended		6 Months Ended		12 Months Ended						6 Months Ended		12 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended		12 Months Ended		3 Months Ended		12 Months Ended		3 Months Ended		12 Months Ended		6 Months Ended		12 Months Ended				6 Months Ended		12 Months Ended				6 Months Ended		12 Months Ended				6 Months Ended		12 Months Ended
	Dec. 31, 2013 segments	Dec. 31, 2013 Successor [Member]	Sep. 30, 2013 Successor [Member]	Jun. 30, 2013 Successor [Member]	Mar. 31, 2013 Successor [Member]	Dec. 30, 2012 Successor [Member]	Dec. 31, 2013 Successor [Member]	Dec. 31, 2013 Successor [Member]		Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Successor [Member]	Dec. 31, 2013 Successor [Member] Corporate Segment [Member]	Dec. 30, 2012 Successor [Member] Wireless [Member]	Dec. 31, 2013 Successor [Member] Wireless [Member]	Dec. 31, 2012 Successor [Member] Wireless [Member]	Dec. 30, 2012 Successor [Member] Wireline [Member]	Dec. 31, 2013 Successor [Member] Wireline [Member]	Dec. 31, 2012 Successor [Member] Wireline [Member]	Dec. 30, 2012 Successor [Member] Corporate, Other And Eliminations [Member]	Dec. 31, 2013 Successor [Member] Corporate, Other And Eliminations [Member]	Dec. 31, 2012 Successor [Member] Corporate, Other And Eliminations [Member]	Dec. 31, 2013 Successor [Member] Lease [Member]		Dec. 31, 2013 Successor [Member] Lease [Member] Wireless [Member]	Dec. 31, 2013 Successor [Member] Lease [Member] Wireline [Member]	Jul. 09, 2013 Predecessor [Member]	Jun. 30, 2013 Predecessor [Member]	Mar. 31, 2013 Predecessor [Member]	Dec. 31, 2012 Predecessor [Member]	Sep. 30, 2012 Predecessor [Member]	Jun. 30, 2012 Predecessor [Member]	Mar. 31, 2012 Predecessor [Member]	Jul. 09, 2013 Predecessor [Member]	Jul. 10, 2013 Predecessor [Member]		Dec. 31, 2012 Predecessor [Member]		Dec. 31, 2011 Predecessor [Member]		Jul. 10, 2013 Predecessor [Member] Wireless [Member]	Dec. 31, 2012 Predecessor [Member] Wireless [Member]	Dec. 31, 2011 Predecessor [Member] Wireless [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member]	Dec. 31, 2012 Predecessor [Member] Wireline [Member]	Dec. 31, 2011 Predecessor [Member] Wireline [Member]	Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member]		Dec. 31, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member]		Dec. 31, 2011 Predecessor [Member] Corporate, Other And Eliminations [Member]		Dec. 31, 2012 Predecessor [Member] Lease [Member]		Jul. 10, 2013 Predecessor [Member] Lease [Member] Wireless [Member]		Dec. 31, 2011 Predecessor [Member] Lease [Member] Wireless [Member]	Dec. 30, 2012 Intersegment Eliminations [Member] Successor [Member]		Dec. 31, 2013 Intersegment Eliminations [Member] Successor [Member]		Dec. 30, 2012 Intersegment Eliminations [Member] Successor [Member] Wireless [Member]		Dec. 31, 2013 Intersegment Eliminations [Member] Successor [Member] Wireless [Member]		Dec. 30, 2012 Intersegment Eliminations [Member] Successor [Member] Wireline [Member]		Dec. 31, 2013 Intersegment Eliminations [Member] Successor [Member] Wireline [Member]		Dec. 30, 2012 Intersegment Eliminations [Member] Successor [Member] Corporate, Other And Eliminations [Member]		Dec. 31, 2013 Intersegment Eliminations [Member] Successor [Member] Corporate, Other And Eliminations [Member]		Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member]		Dec. 31, 2012 Intersegment Eliminations [Member] Predecessor [Member]		Dec. 31, 2011 Intersegment Eliminations [Member] Predecessor [Member]		Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Wireless [Member]		Dec. 31, 2012 Intersegment Eliminations [Member] Predecessor [Member] Wireless [Member]		Dec. 31, 2011 Intersegment Eliminations [Member] Predecessor [Member] Wireless [Member]		Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Wireline [Member]		Dec. 31, 2012 Intersegment Eliminations [Member] Predecessor [Member] Wireline [Member]		Dec. 31, 2011 Intersegment Eliminations [Member] Predecessor [Member] Wireline [Member]		Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Corporate, Other And Eliminations [Member]		Dec. 31, 2012 Intersegment Eliminations [Member] Predecessor [Member] Corporate, Other And Eliminations [Member]		Dec. 31, 2011 Intersegment Eliminations [Member] Predecessor [Member] Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Severance and exit costs								$ 309,000,000																										$ 652,000,000
Restructuring Charges							(328,000,000)															(56,000,000)	[1]	(54,000,000)	(2,000,000)									(687,000,000)		(240,000,000)		(28,000,000)														(196,000,000)	[2]	(478,000,000)	[3]	0
Business Combination, Acquisition Related Costs								(100,000,000)				(75,000,000)		(25,000,000)																				(53,000,000)		(19,000,000)
Number of Reportable Segments	2
Segment Reporting Information, Total Net Operating Revenues						0		16,891,000,000					0	15,642,000,000		0	1,240,000,000		0	9,000,000														18,602,000,000		35,366,000,000		33,679,000,000		17,125,000,000	32,355,000,000	30,301,000,000	1,471,000,000	2,999,000,000	3,370,000,000	6,000,000		12,000,000		8,000,000
Revenues		9,142,000,000	7,749,000,000	0	0	0		16,891,000,000						15,642,000,000			1,636,000,000			(387,000,000)						932,000,000	8,877,000,000	8,793,000,000	9,005,000,000	8,763,000,000	8,843,000,000	8,734,000,000		18,602,000,000		35,345,000,000		33,679,000,000		17,125,000,000	32,355,000,000	30,301,000,000	1,901,000,000	3,881,000,000	4,326,000,000	(424,000,000)	[4]	(870,000,000)	[4]	(948,000,000)	[4]						0	[5]	0	[5]	0	[5]	0	[5]	0	[5]	396,000,000	[5]	0	[5]	(396,000,000)	[5]	0	[5]	0	[5]	0	[5]	0	[5]	0	[5]	0	[5]	430,000,000	[5]	882,000,000	[5]	956,000,000	[5]	(430,000,000)	[5]	(882,000,000)	[5]	(956,000,000)	[5]
Segment Operating Expenses						(33,000,000)		(14,525,000,000)					0	(13,464,000,000)		0	(1,414,000,000)		(33,000,000)	353,000,000														(15,559,000,000)		(30,563,000,000)		(28,607,000,000)		(14,355,000,000)	(28,208,000,000)	(26,034,000,000)	(1,629,000,000)	(3,232,000,000)	(3,526,000,000)	425,000,000		877,000,000		953,000,000
Segment Reporting Information Operating Income or Loss						(33,000,000)		2,366,000,000					0	2,178,000,000		0	222,000,000		(33,000,000)	(34,000,000)														3,043,000,000		4,803,000,000		5,072,000,000		2,770,000,000	4,147,000,000	4,267,000,000	272,000,000	649,000,000	800,000,000	1,000,000		7,000,000		5,000,000
Depreciation						0		2,026,000,000																										3,098,000,000		6,240,000,000		4,455,000,000
Amortization of Intangible Assets						0		(908,000,000)																										(147,000,000)		(303,000,000)		(403,000,000)
Business combination and hurricane-related charges																																				(64,000,000)	[6]
Other, net								(402,000,000)	[7]																									(683,000,000)	[7]	(16,000,000)	[7]	(106,000,000)	[7]
Operating income (loss)		576,000,000	358,000,000	22,000,000	14,000,000	33,000,000		970,000,000																		40,000,000	(874,000,000)	(29,000,000)	705,000,000	231,000,000	629,000,000	255,000,000		885,000,000		1,820,000,000		(108,000,000)
Interest Expense						0		(918,000,000)																										(1,135,000,000)		(1,428,000,000)		(1,011,000,000)
Income (Loss) from Equity Method Investments																																	482,000,000			1,100,000,000		1,700,000,000																																																							(1,114,000,000)		(1,730,000,000)
Equity in losses of unconsolidated investments, net						0		0																										(482,000,000)		(1,114,000,000)		(1,730,000,000)
Income loss from equity method investments, net																																		2,444,000,000
Other Nonoperating Income (Expense)						10,000,000		73,000,000																										19,000,000		190,000,000		(3,000,000)
Loss (income) before income taxes						(23,000,000)		(1,815,000,000)																										443,000,000		(4,172,000,000)		(2,636,000,000)																																			443,000,000
Gain on previously-held equity interests						0		0																										2,926,000,000		0		0
Payment received for incremental costs or obligations incurred by the Company for Spectrum Hosting						0		0																										0		236,000,000		0
Gain Loss from asset dispositions and exchanges						0		0																										0		29,000,000		0
Net benefit resulting from favorable developments relating to access cost disputes associated with prior periods																																				17,000,000
Severance, exit costs and asset impairments						0		309,000,000																										652,000,000		298,000,000		106,000,000
Asset impairments						0		0		102,000,000	78,000,000																							0		102,000,000		78,000,000
Payments to Acquire Property, Plant, and Equipment						0		3,847,000,000						3,535,000,000			153,000,000			159,000,000														3,140,000,000		4,261,000,000		3,130,000,000		2,840,000,000	3,753,000,000	2,702,000,000	174,000,000	240,000,000	168,000,000	126,000,000		268,000,000		260,000,000
Assets		86,095,000,000					86,095,000,000	86,095,000,000		3,115,000,000				75,128,000,000	0		1,548,000,000	0		9,419,000,000	3,115,000,000								51,570,000,000							51,570,000,000		49,383,000,000			38,297,000,000	37,606,000,000		2,195,000,000	2,355,000,000			11,078,000,000		9,422,000,000
OtherOperatingExpensesNet						0		0																										22,000,000		282,000,000		0
Other Nonrecurring (Income) Expense							7,000,000																													(45,000,000)					(4,000,000)
Contra Revenue																																									21,000,000
Cost of services and products, nonrecurring																																				$ 20,000,000					$ 17,000,000			$ 3,000,000

[1] (8)For the year ended December 31, 2013, we recognized costs of $56 million ($54 million Wireless, $2 million Wireline).

[2] (4)For the year ended December 31, 2012, we recognized costs of $196 million (solely attributable to our Wireless segment).

[3] (1)For the 191-day period ended July 10, 2013, we recognized net costs of $478 million (solely attributable to our Wireless segment).

[4] (1)Revenues eliminated in consolidation consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.

[5] (1)Inter-segment revenues consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.

[6] (3)Includes $45 million of hurricane-related charges for the Predecessor year ended December 31, 2012, which are classified in our consolidated statements of comprehensive loss as follows: $21 million as contra-revenue in net operating revenues of Wireless, $20 million as cost of services and products ($17 million Wireless; $3 million Wireline), and $4 million as selling, general and administrative expenses in our Wireless segment. Also includes $19 million of business combination charges for fees paid to unrelated parties necessary for the proposed transactions with SoftBank and Clearwire, which is included in our corporate segment and classified as selling, general and administrative expenses.

[7] (2)Other, net for the Successor year ended December 31, 2013 consists of $309 million of severance and exit costs and $100 million of business combination fees paid to unrelated parties in connection with the transactions with SoftBank and Clearwire ($75 million included in our corporate segment and $25 million included in our wireless segment and classified as selling, general and administrative expenses), partially offset by $7 million of insurance reimbursement towards 2012 hurricane-related charges (included in our wireless segment and classified as a contra-expense in cost of services expense). Other, net for the Predecessor 191-day period ended July 10, 2013 consists of $652 million of severance and exit costs and $53 million of business combination fees paid to unrelated parties in connection with the transactions with SoftBank and Clearwire (included in our corporate segment and classified as selling, general and administrative expenses), partially offset by $22 million of favorable developments in connection with an E911 regulatory tax-related contingency. Other, net for the Predecessor year ended December 31, 2012 consists of $196 million of lease exit costs and $102 million of asset impairment charges, partially offset by net operating income of $236 million associated with the termination of the spectrum hosting arrangement with LightSquared, a gain of $29 million on spectrum swap transactions, and a benefit of $17 million resulting from favorable developments relating to access cost disputes associated with prior periods. Other, net for the Predecessor year ended December 31, 2011 consists of $106 million of severance, exit costs and asset impairments associated with the shut-down of the Nextel platform.