CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) Share data in Millions, except Per Share data, unless otherwise specified	6 Months Ended	3 Months Ended				12 Months Ended
	Jul. 10, 2013	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2015		Dec. 31, 2013	Dec. 31, 2012
Other (expense) income:
Income tax benefit (expense)	$ (1,600,000,000)
Successor [Member]
Net operating revenues:
Service		7,876,000,000		0		29,542,000,000		15,094,000,000
Equipment		999,000,000		0		4,990,000,000		1,797,000,000
Net operating revenues		8,875,000,000		0		34,532,000,000		16,891,000,000
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)		2,622,000,000		0		9,660,000,000		5,174,000,000
Cost of products (exclusive of depreciation and amortization below)		2,038,000,000		0		9,309,000,000		4,603,000,000
Selling, general and administrative		2,371,000,000		14,000,000		9,563,000,000		4,841,000,000
Impairments		75,000,000	[1]	0		2,133,000,000	[1]	0
Severance and exit costs		52,000,000		0		304,000,000		309,000,000
Depreciation		868,000,000		0		3,797,000,000		2,026,000,000
Amortization		429,000,000		0		1,552,000,000		908,000,000
Other, net		0		0		109,000,000		0
Total costs and expenses		8,455,000,000		14,000,000		36,427,000,000		17,861,000,000
Operating (loss) income		420,000,000		(14,000,000)		(1,895,000,000)		(970,000,000)
Other (expense) income:
Interest expense		(516,000,000)		0		(2,051,000,000)		(918,000,000)
Equity in losses of unconsolidated investments, net		0		0		0		0
Gain on previously-held equity interests		0		0		0		0
Other income (expense), net		1,000,000		6,000,000		27,000,000		73,000,000
Nonoperating income (expense)		(515,000,000)		6,000,000		(2,024,000,000)		(845,000,000)
Loss (income) before income taxes		(95,000,000)		(8,000,000)		(3,919,000,000)		(1,815,000,000)
Income tax benefit (expense)		(56,000,000)		(1,000,000)		574,000,000		(45,000,000)
Net loss		(151,000,000)		(9,000,000)		(3,345,000,000)		(1,860,000,000)
Basic and diluted net loss per common share		$ (0.04)		$ 0.00	[2]	$ (1)		$ (0.54)
Basic and diluted weighted average common shares outstanding		3,949				3,953		3,475
Predecessor [Member]
Net operating revenues:
Service	16,895,000,000			7,980,000,000					32,097,000,000
Equipment	1,707,000,000			813,000,000					3,248,000,000
Net operating revenues	18,602,000,000			8,793,000,000					35,345,000,000
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	5,673,000,000			2,640,000,000					10,936,000,000
Cost of products (exclusive of depreciation and amortization below)	4,872,000,000			2,293,000,000					9,905,000,000
Selling, general and administrative	5,067,000,000			2,336,000,000					9,765,000,000
Impairments	0			0					102,000,000	[1]
Severance and exit costs	652,000,000			25,000,000					196,000,000
Depreciation	3,098,000,000			1,422,000,000					6,240,000,000
Amortization	147,000,000			70,000,000					303,000,000
Other, net	(22,000,000)			(22,000,000)					(282,000,000)
Total costs and expenses	19,487,000,000			8,764,000,000					37,165,000,000
Operating (loss) income	(885,000,000)			29,000,000					(1,820,000,000)
Other (expense) income:
Interest expense	(1,135,000,000)			(432,000,000)					(1,428,000,000)
Equity in losses of unconsolidated investments, net	(482,000,000)			(202,000,000)					(1,114,000,000)
Gain on previously-held equity interests	2,926,000,000			0					0
Other income (expense), net	19,000,000			0					190,000,000
Nonoperating income (expense)	1,328,000,000			(634,000,000)					(2,352,000,000)
Loss (income) before income taxes	443,000,000			(605,000,000)					(4,172,000,000)
Income tax benefit (expense)	(1,601,000,000)			(38,000,000)					(154,000,000)
Net loss	$ (1,158,000,000)			$ (643,000,000)					$ (4,326,000,000)
Basic and diluted net loss per common share	$ (0.38)			$ (0.21)					$ (1.44)
Basic and diluted weighted average common shares outstanding	3,027			3,013					3,002

[1] (2)Impairments for the Successor year ended March 31, 2015 consist of a $1.9 billion trade name impairment related to the Wireless segment and a $233 million impairment related to Wireline long-lived assets. Impairments for the Successor three-month transition period ended March 31, 2014 consist of network equipment assets no longer necessary for management's strategic plans. Impairments for the Predecessor year ended December 31, 2012 primarily consist of capitalized assets associated with the termination of the spectrum hosting arrangement with LightSquared.

[2] (1)The sum of the quarterly earnings per share amounts may not equal the annual amounts because of the changes in the weighted average number of shares outstanding during the year.