Segment Information (Segment Financial Information) (Details) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended			9 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended			0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	6 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended
	Jul. 10, 2013	Sep. 30, 2013	Jul. 10, 2013	Sep. 30, 2013 segments	Sep. 30, 2012	Sep. 30, 2013 Corporate Segment [Member]	Sep. 30, 2013 Corporate Segment [Member]	Jul. 10, 2013 Wireless [Member]	Sep. 30, 2013 Wireless [Member]	Sep. 30, 2013 Wireless [Member]	Sep. 30, 2012 Lease [Member]	Sep. 30, 2012 Lease [Member]	Jul. 10, 2013 Lease [Member] Wireless [Member]	Sep. 30, 2013 Successor [Member]	Sep. 30, 2013 Successor [Member]		Sep. 30, 2013 Successor [Member]		Sep. 30, 2013 Successor [Member] Wireless [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member]	Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member]		Sep. 30, 2013 Successor [Member] Lease [Member]	Sep. 30, 2013 Successor [Member] Lease [Member] Wireless [Member]	Sep. 30, 2013 Successor [Member] Lease [Member] Wireline [Member]	Jul. 10, 2013 Predecessor [Member]	Sep. 30, 2012 Predecessor [Member]	Jul. 10, 2013 Predecessor [Member]	Sep. 30, 2012 Predecessor [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member]	Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member]	Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member]	Jul. 10, 2013 Predecessor [Member] Lease [Member] Wireless [Member]	Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member]		Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member]		Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member] Wireless [Member]		Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member] Wireless [Member]		Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member] Wireline [Member]		Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member] Wireline [Member]		Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member] Corporate, Other And Eliminations [Member]		Sep. 30, 2013 Intersegment Eliminations [Member] Successor [Member] Corporate, Other And Eliminations [Member]		Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member]	Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member]	Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Wireless [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member] Wireless [Member]	Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Wireless [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member] Wireless [Member]	Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Wireline [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member] Wireline [Member]	Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Wireline [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member] Wireline [Member]	Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Corporate, Other And Eliminations [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member] Corporate, Other And Eliminations [Member]	Jul. 10, 2013 Intersegment Eliminations [Member] Predecessor [Member] Corporate, Other And Eliminations [Member]	Sep. 30, 2012 Intersegment Eliminations [Member] Predecessor [Member] Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Restructuring Charges		$ 103,000,000	$ (652,000,000)	$ (103,000,000)									$ (37,000,000)	$ 110,000,000															$ 45,000,000	$ 43,000,000	$ 2,000,000			$ 687,000,000														$ 478,000,000
Business Combination, Acquisition Related Costs	(19,000,000)	100,000,000	(53,000,000)	(100,000,000)		75,000,000	75,000,000		25,000,000	25,000,000
Number of Reportable Segments				2
Segment Reporting Information, Total Net Operating Revenues															7,749,000,000		7,749,000,000			7,159,000,000	7,159,000,000		586,000,000	586,000,000	4,000,000		4,000,000					932,000,000	8,763,000,000	18,602,000,000	26,340,000,000	858,000,000	8,042,000,000	17,125,000,000	24,059,000,000	74,000,000	717,000,000	1,471,000,000	2,272,000,000	0	4,000,000	6,000,000	9,000,000
Revenues															7,749,000,000		7,749,000,000			7,159,000,000	7,159,000,000		777,000,000	777,000,000	(187,000,000)	[1]	(187,000,000)	[1]				932,000,000	8,763,000,000	18,602,000,000	26,340,000,000	858,000,000	8,042,000,000	17,125,000,000	24,059,000,000	98,000,000	939,000,000	1,901,000,000	2,932,000,000	(24,000,000)	(218,000,000)	(424,000,000)	(651,000,000)		0	[2]	0	[2]	0	[2]	0	[2]	191,000,000	[2]	191,000,000	[2]	(191,000,000)	[2]	(191,000,000)	[2]	0	0	0	0	0	0	0	0	24,000,000	222,000,000	430,000,000	660,000,000	(24,000,000)	(222,000,000)	(430,000,000)	(660,000,000)
Segment Operating Expenses															(6,501,000,000)		(6,537,000,000)			(6,034,000,000)	(6,034,000,000)		(660,000,000)	(660,000,000)	193,000,000		157,000,000					(837,000,000)	(7,484,000,000)	(15,559,000,000)	(22,397,000,000)	(777,000,000)	(6,924,000,000)	(14,355,000,000)	(20,590,000,000)	(83,000,000)	(781,000,000)	(1,629,000,000)	(2,464,000,000)	23,000,000	221,000,000	425,000,000	657,000,000
Segment Reporting Information Operating Income or Loss															1,248,000,000		1,212,000,000			1,125,000,000	1,125,000,000		117,000,000	117,000,000	6,000,000		(30,000,000)					95,000,000	1,279,000,000	3,043,000,000	3,943,000,000	81,000,000	1,118,000,000	2,770,000,000	3,469,000,000	15,000,000	158,000,000	272,000,000	468,000,000	(1,000,000)	3,000,000	1,000,000	6,000,000
Depreciation															942,000,000		942,000,000															113,000,000	1,411,000,000	3,098,000,000	4,820,000,000
Amortization of Intangible Assets															(461,000,000)		(461,000,000)															(8,000,000)	(77,000,000)	(147,000,000)	(230,000,000)
Other, net															(203,000,000)	[3]	(203,000,000)	[3]														(14,000,000)	(22,000,000)	(683,000,000)	(8,000,000)
Operating income (loss)															358,000,000		394,000,000															40,000,000	231,000,000	885,000,000	1,115,000,000
Interest Expense															(416,000,000)		(416,000,000)															(275,000,000)	(377,000,000)	(1,135,000,000)	(996,000,000)
Income (Loss) from Equity Method Investments															0		0															(23,000,000)	(208,000,000)	(482,000,000)	(927,000,000)																																										(23,000,000)	(208,000,000)	(482,000,000)	(927,000,000)
Income loss from equity method investments, net																																2,903,000,000		2,444,000,000
Other Nonoperating Income (Expense)															165,000,000		18,000,000															2,000,000	96,000,000	19,000,000	144,000,000
Loss (income) before income taxes															(609,000,000)		(792,000,000)															2,590,000,000	(720,000,000)	443,000,000	(2,894,000,000)																														2,590,000,000		443,000,000
Gain on previously-held equity interests															0		0															2,926,000,000	0	2,926,000,000	0																																										2,926,000,000		2,926,000,000
Payment received for incremental costs or obligations incurred by the Company for Spectrum Hosting					236,000,000												0																	0	236,000,000
Gain Loss from asset dispositions and exchanges					29,000,000												0																	0	29,000,000
Net benefit resulting from favorable developments relating to access cost disputes associated with prior periods					17,000,000						(22,000,000)	206,000,000
Asset impairments				0										0			0															0		0	84,000,000
Payments to Acquire Property, Plant, and Equipment																	1,878,000,000				1,743,000,000			73,000,000			62,000,000							3,140,000,000	2,784,000,000			2,840,000,000	2,413,000,000			174,000,000	186,000,000			126,000,000	185,000,000
OtherOperatingExpensesNet			(22,000,000)												0		0															0	0	22,000,000	282,000,000
Severance Costs								$ (32,000,000)						$ 41,000,000					$ 33,000,000			$ 8,000,000												$ 58,000,000				$ 55,000,000				$ 3,000,000

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

[2] ment revenues consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers. (2)Oth

[3] , net for the three and nine-month periods ended September 30, 2013 consists of severance and exit costs of $103 million and $100 million, respectively, 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 in our consolidated statements of comprehensive income (loss) as selling, general and administrative expenses). Other, net for the 191-day period ended July 10, 2013 consists of severance and exit costs of $652 million 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 in our consolidated statements of comprehensive income (loss) 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 10-day period ended July 10, 2013 consists of $32 million of severance costs primarily associated with the Clearwire Acquisition and $19 million of business combination fees paid to unrelated parties in connection with the transactions with SoftBank and Clearwire, partially offset by $37 million related to changes in estimates for lease exit costs previously recognized. Other, net for the nine-month period ended September 30, 2012 consists of 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, partially offset by $206 million of lease exit costs and $84 million of asset impairment charges. Other, net for the three-month period ended September 30, 2012 consists of $22 million of lease exit costs associated with the shut-down of the Nextel platform. PredecessorOperating Revenues by Service and ProductsWireless Wireline Corporate, Other andEliminations(1) Consolidated (in millions)191 Days Ended July 10, 2013 Wireless services$15,139 $— $— $15,139Wireless equipment1,707 — — 1,707Voice— 771 (236) 535Data— 188 (93) 95Internet— 913 (100) 813Other279 29 5 313Total net operating revenues$17,125 $1,901 $(424) $18,602 Wireless Wireline Corporate, Other andEliminations(1) Consolidated (in millions)10 Days Ended July 10, 2013 Wireless services$769 $— $— $769Wireless equipment74 — — 74Voice— 42 (15) 27Data— 7 (3) 4Internet— 47 (5) 42Other15 2 (1) 16Total net operating revenues$858 $98 $(24) $932 Wireless Wireline Corporate, Other andEliminations(1) Consolidated (in millions)Nine Months Ended September 30, 2012 Wireless services$21,473 $— $— $21,473Wireless equipment2,238 — — 2,238Voice— 1,242 (388) 854Data— 302 (132) 170Internet— 1,330 (141) 1,189Other348 58 10 416Total net operating revenues$24,059 $2,932 $(651) $26,340 Wireless Wireline Corporate, Other andEliminations(1) Consolidated (in millions)Three Months Ended September 30, 2012 Wireless services$7,171 $— $— $7,171Wireless equipment750 — — 750Voice— 399 (131) 268Data— 95 (45) 50Internet— 428 (47) 381Other121 17 5 143Total net operating revenues$8,042 $939 $(218) $8,763 SuccessorOperating Revenues by Service and ProductsWireless Wireline Corporate, Other andEliminations(1) Consolidated (in millions)Nine Months Ended September 30, 2013 Wireless services$6,399 $— $— $6,399Wireless equipment636 — — 636Voice— 333 (120) 213Data— 57 (23) 34Internet— 373 (46) 327Other124 14 2 140Total net operating revenues$7,159 $777 $(187) $7,749 Wireless Wireline Corporate, Other andEliminations(1) Consolidated (in millions)Three Months Ended September 30, 2013 Wireless services$6,399 $— $— $6,399Wireless equipment636 — — 636Voice— 333 (120) 213Data— 57 (23) 34Internet— 373 (46) 327Other124 14 2 140Total net operating revenues$7,159 $777 $(187) $7,749 ___