SPRINT 10-K 26 May 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2015	18-May-15	Sep. 30, 2014
Document and Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	S
Entity Registrant Name	SPRINT CORP
Entity Central Index Key	101830
Current Fiscal Year End Date	-28
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		3,967,215,647
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$4,747,107,524

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (Successor [Member], USD $)	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Successor [Member]
Current assets
Cash and cash equivalents	$4,010		$4,970		$6,364
Short-term investments	166		1,220
Accounts and notes receivable, net	2,290		3,607
Device and accessory inventory	1,359		982
Deferred tax assets	62		128
Prepaid expenses and other current assets	1,890		672
Total current assets	9,777		11,579
Property, plant and equipment, net	19,721		16,299
Intangible assets
Goodwill	6,575		6,383		6,434
FCC licenses and other	39,987		41,978
Definite-lived intangible assets, net	5,893		7,558
Other assets	1,077		892
Total assets	83,030		84,689		86,095
Current liabilities
Accounts payable	4,347	[1]	3,163	[1]
Accrued expenses and other current liabilities	5,293		5,544
Current portion of long-term debt, financing and capital lease obligations	1,300		991
Total current liabilities	10,940		9,698
Long-term debt, financing and capital lease obligations	32,531		31,787
Deferred tax liabilities	13,898		14,207
Other liabilities	3,951		3,685
Total liabilities	61,320		59,377
Commitments and contingencies
Stockholders' equity
Common stock	40		39
Paid-in capital	27,468		27,354
Treasury shares, at cost	-7		0
Accumulated deficit	-5,383		-2,038
Accumulated other comprehensive loss	-408		-43
Total stockholders' equity	21,710		25,312		25,584
Total liabilities and stockholders' equity	$83,030		$84,689
[1]	Includes liabilities in the amounts of $90 million and $91 million as of March 31, 2015 and 2014, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) (Successor [Member], USD $)	Mar. 31, 2015	Mar. 31, 2014
Successor [Member]
Common stock, par value	$0.01	$0.01
Common shares, shares authorized (in shares)	9,000,000,000	9,000,000,000
Common stock, shares, issued	3,967,000,000	3,941,000,000

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	6 Months Ended	3 Months Ended				12 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	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	[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.

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	3 Months Ended			12 Months Ended		6 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2015	Dec. 31, 2013	Jul. 10, 2013	Dec. 31, 2012
Successor [Member]
Net loss	($151)	($9)	($27)	($3,345)	($1,860)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	1	0	0	-25	3
Unrealized holding (losses) gains on securities:
Unrealized holding (losses) gains on securities	1	0	0	-6	6
Less: Reclassification adjustment for realized gains included in net loss	0	0	0	0	0
Net unrealized holding (losses) gains on securities	1	0	0	-6	6
Unrecognized net periodic pension and other postretirement benefits:
Net actuarial (loss) gain	-147	0	0	-393	93
Less: Amortization of actuarial loss, included in net loss	0	0	0	0	0
Less: Settlement event charge, included in net loss	0	0	0	59	0
Net unrecognized net periodic pension and other postretirement benefits	-147	0	0	-334	93
Other comprehensive (loss) income	-145	0	0	-365	102
Comprehensive (loss)	-296	-9	-27	-3,710	-1,758
Predecessor [Member]
Net loss		-643				-1,158	-4,326
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment		-2				-8	-4
Unrealized holding (losses) gains on securities:
Unrealized holding (losses) gains on securities		1				-4	5
Less: Reclassification adjustment for realized gains included in net loss		0				0	-3
Net unrealized holding (losses) gains on securities		1				-4	2
Unrecognized net periodic pension and other postretirement benefits:
Net actuarial (loss) gain		0				0	-404
Less: Amortization of actuarial loss, included in net loss		15				35	65
Less: Settlement event charge, included in net loss		0				0	0
Net unrecognized net periodic pension and other postretirement benefits		15				35	-339
Other comprehensive (loss) income		14				23	-341
Comprehensive (loss)		($629)				($1,135)	($4,667)

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended				12 Months Ended			6 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2015		Dec. 31, 2013	Jul. 10, 2013	Dec. 31, 2012
Successor [Member]
Cash flows from operating activities:
Net loss	($151)		($9)	($27)	($3,345)		($1,860)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Asset impairments	75	[1]	0	0	2,133	[1]	0
Depreciation and amortization	1,297		0	0	5,349		2,934
Provision for losses on accounts receivable	153		0	0	892		261
Share-based and long-term incentive compensation expense	35		0	0	86		98
Deferred income tax (benefit) expense	46		-1	1	-609		32
Equity in losses of unconsolidated investments, net	0		0	0	0		0
Gain on previously-held equity interests	0		0	0	0		0
Amortization and accretion of long-term debt premiums and discounts	-74		0	0	-303		-160
Other changes in assets and liabilities:
Accounts and notes receivable	-232		-11	-6	-644		-558
Inventories and other current assets	173		0	0	-1,573		-391
Accounts payable and other current liabilities	-490		8	3	481		25
Non-current assets and liabilities, net	-350		0	0	-199		-386
Other, net	40		11	29	182		-56
Net cash provided by (used in) operating activities	522		-2	0	2,450		-61
Cash flows from investing activities:
Capital expenditures - network and other	-1,488		0	0	-5,422		-3,847
Capital expenditures - leased devices	0		0	0	-582		0
Expenditures relating to FCC licenses	-152		0	0	-163		-146
Reimbursements related to FCC licenses	0		0	0	95		0
Acquisitions, net of cash acquired	0		0	0	0		-14,112
Investment in Clearwire (including debt securities)	0		0	0	0		0
Investment and derivative in Sprint Communications, Inc.	0		0	-3,100	0		0
Proceeds from sales and maturities of short-term investments	920		0	0	3,131		1,715
Purchases of short-term investments	-1,035		0	0	-2,077		-1,719
Proceeds from sale of assets and FCC licenses	1		0	0	315		7
Other, net	-2		0	0	-11		-6
Net cash used in investing activities	-1,756		0	-3,100	-4,714		-18,108
Cash flows from financing activities:
Proceeds from debt and financings	0		0	0	1,930		9,500
Repayments of debt, financing and capital lease obligations	-159		0	0	-574		-3,378
Debt financing costs	-1		0	0	-87		-147
Proceeds from issuance of common stock and warrants, net	0		0	3,105	35		18,567
Other, net	0		0	0	0		-14
Net cash provided by (used in) financing activities	-160		0	3,105	1,304		24,528
Net (decrease) increase in cash and cash equivalents	-1,394		-2	5	-960		6,359
Cash and cash equivalents, beginning of period	6,364		5	0	4,970		5	5
Cash and cash equivalents, end of period	4,970		3	5	4,010		6,364		5
Predecessor [Member]
Cash flows from operating activities:
Net loss			-643					-1,158	-4,326
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Asset impairments			0					0	102	[1]
Depreciation and amortization			1,492					3,245	6,543
Provision for losses on accounts receivable			83					194	561
Share-based and long-term incentive compensation expense			17					37	82
Deferred income tax (benefit) expense			24					1,586	209
Equity in losses of unconsolidated investments, net			202					482	1,114
Gain on previously-held equity interests			0					-2,926	0
Amortization and accretion of long-term debt premiums and discounts			14					9	4
Other changes in assets and liabilities:
Accounts and notes receivable			215					150	-892
Inventories and other current assets			243					298	-486
Accounts payable and other current liabilities			-734					280	577
Non-current assets and liabilities, net			16					207	-119
Other, net			11					267	-370
Net cash provided by (used in) operating activities			940					2,671	2,999
Cash flows from investing activities:
Capital expenditures - network and other			-1,381					-3,140	-4,261
Capital expenditures - leased devices			0					0	0
Expenditures relating to FCC licenses			-55					-125	-198
Reimbursements related to FCC licenses			0					0	0
Acquisitions, net of cash acquired			0					-4,039	0
Investment in Clearwire (including debt securities)			-80					-308	-228
Investment and derivative in Sprint Communications, Inc.			0					0	0
Proceeds from sales and maturities of short-term investments			1,281					2,445	1,513
Purchases of short-term investments			-926					-1,221	-3,212
Proceeds from sale of assets and FCC licenses			6					10	19
Other, net			-3					-7	-8
Net cash used in investing activities			-1,158					-6,385	-6,375
Cash flows from financing activities:
Proceeds from debt and financings			204					204	9,176
Repayments of debt, financing and capital lease obligations			-59					-362	-4,791
Debt financing costs			-10					-11	-134
Proceeds from issuance of common stock and warrants, net			7					60	29
Other, net			0					0	0
Net cash provided by (used in) financing activities			142					-109	4,280
Net (decrease) increase in cash and cash equivalents			-76					-3,823	904
Cash and cash equivalents, beginning of period			6,351				6,351	6,351	5,447
Cash and cash equivalents, end of period			$6,275	$6,351				$2,528	$6,351
[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.

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)		Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Successor [Member]		Successor [Member]		Successor [Member]		Successor [Member]		Successor [Member]		Successor [Member]		SoftBank [Member]	SoftBank [Member]	SoftBank [Member]	Common Class B [Member]
In Millions, except Share data, unless otherwise specified		USD ($)	Common Stock [Member]	Paid-in Capital [Member]	Treasury Shares [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	USD ($)		Common Stock [Member]		Paid-in Capital [Member]		Treasury Shares [Member]		Accumulated Deficit [Member]		Accumulated Other Comprehensive (Loss) Income [Member]		Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]
			USD ($)	USD ($)	USD ($)	USD ($)	USD ($)			USD ($)		USD ($)		USD ($)		USD ($)		USD ($)		USD ($)	Common Stock [Member]	Paid-in Capital [Member]	Common Stock [Member]
																					USD ($)	USD ($)
Balance at Dec. 31, 2011		$11,427	$5,992	$46,716	$0	($40,489)	($792)
Balance (in shares) at Dec. 31, 2011			2,996,000,000		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		-4,326				-4,326
Other comprehensive (loss) income		-341					-341
Issuance of common stock, net (in shares)			14,000,000
Issuance of common stock, net		29	27	2
Share-based compensation expense		44		44
Beneficial conversion feature on convertible bond		254		254
Common stock, shares, issued																							3,000,000
Balance at Dec. 31, 2012		7,087	6,019	47,016	0	-44,815	-1,133							0	[1]
Balance (in shares) at Dec. 31, 2012			3,010,000,000		0									0	[1]
Balance at Oct. 05, 2012	[1]							0		0		0		0		0		0
Balance (in shares) at Oct. 05, 2012	[1]									0				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								-27								-27
Other comprehensive (loss) income								0
Capital contribution by SoftBank												3,105
Expenses incurred by SoftBank for the benefit of Sprint								32				32
Common stock, shares, issued																							3,000,000
Balance at Dec. 31, 2012		7,087			0			3,110	[1]			3,137	[1]	0	[1]	-27	[1]
Balance (in shares) at Dec. 31, 2012					0									0	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		-643						-9
Other comprehensive (loss) income		14						0
Balance at Mar. 31, 2013
Balance at Dec. 31, 2012		7,087	6,019	47,016	0	-44,815	-1,133							0	[1]
Balance (in shares) at Dec. 31, 2012			3,010,000,000		0									0	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		-1,158				-1,158
Other comprehensive (loss) income		23					23
Issuance of common stock, net (in shares)			16,000,000
Issuance of common stock, net		60	33	27
Share-based compensation expense		18		18
Conversion of convertible debt (in shares)			590,000,000
Conversion of convertible debt			1,181
Adjustments to paid in capital, conversation of convertible debt				1,919
Beneficial conversion feature on convertible bond		3,100
Balance at Jul. 10, 2013		9,130	7,233	48,980	0	-45,973	-1,110
Balance (in shares) at Jul. 10, 2013			3,616,000,000		0
Balance at Dec. 31, 2012					0			3,110	[1]	0	[1]	3,137	[1]	0	[1]	-27	[1]	0	[1]
Balance (in shares) at Dec. 31, 2012					0					0	[1]			0	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								-1,860								-1,860
Other comprehensive (loss) income								102										102
Issuance of common stock, net (in shares)										7,000,000
Issuance of common stock, net								27				27
Share-based compensation expense								45				45
Expenses incurred by SoftBank for the benefit of Sprint								97				97
Issuance of common stock to stockholders upon acquisition (in shares)										851,000,000											3,076,000,000
Issuance of common stock to stockholders upon acquisition								5,344		8		5,336								18,401	31	18,370
Conversion of Sprint vested stock-based awards upon acquisition								193				193
Issuance of warrant to SoftBank prior to acquisition								139				139
Return of capital to SoftBank prior to acquisition								-14				-14
Balance at Dec. 31, 2013								25,584		39		27,330		0		-1,887		102
Balance (in shares) at Dec. 31, 2013										3,934,000,000				0
Balance at Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		1,082
Balance at Jul. 10, 2013		9,130			0
Balance (in shares) at Jul. 10, 2013					0
Balance at Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								-1,038
Balance at Dec. 31, 2013								25,584		39		27,330		0		-1,887		102
Balance (in shares) at Dec. 31, 2013										3,934,000,000				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								-151								-151
Other comprehensive (loss) income								-145										-145
Issuance of common stock, net (in shares)										7,000,000
Issuance of common stock, net								0
Share-based compensation expense								24				24
Common stock, shares, issued								3,941,000,000
Balance at Mar. 31, 2014								25,312		39		27,354				-2,038		-43
Balance (in shares) at Mar. 31, 2014										3,941,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								23
Balance at Jun. 30, 2014
Balance at Mar. 31, 2014								25,312		39		27,354		0		-2,038		-43
Balance (in shares) at Mar. 31, 2014										3,941,000,000				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								-3,345								-3,345
Other comprehensive (loss) income								-365										-365
Issuance of common stock, net (in shares)										26,000,000
Issuance of common stock, net								35		1		41
Issuance (repurchase) of common stock, net (in shares)														1,000,000
Issuance (repurchase) of common stock, net														-7
Share-based compensation expense								71				71
Capital contribution by SoftBank												2
Common stock, shares, issued								3,967,000,000
Balance at Mar. 31, 2015								21,710		40		27,468		-7		-5,383		-408
Balance (in shares) at Mar. 31, 2015										3,967,000,000				1,000,000
Balance at Dec. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								-224
Common stock, shares, issued								3,967,000,000
Balance at Mar. 31, 2015								$21,710
[1]	(1)For the Successor period beginning October 5, 2012 and ending December 31, 2012, there were approximately 3 million shares of Class B common stock of Starburst II, Inc. issued and outstanding with an immaterial value. These shares were exchanged in connection with the issuance of common stock to SoftBank upon completion of the Merger.

Description_of_Operations_Note

Description of Operations (Notes)	12 Months Ended
	Mar. 31, 2015
Nature of Operations [Abstract]
Description of Operations [Text Block]	Description of Operations
	Sprint Corporation, including its consolidated subsidiaries, is a communications company offering a comprehensive range of wireless and wireline communications products and services that are designed to meet the needs of individual consumers, businesses, government subscribers and resellers.
	The Wireless segment includes retail, wholesale, and affiliate service revenue from a wide array of wireless voice and data transmission services and equipment revenue from the sale or lease of wireless devices and the sale of accessories in the U.S., Puerto Rico and the U.S. Virgin Islands. The Wireline segment includes revenue from domestic and international wireline voice and data communication services.
	On July 9, 2013 (Clearwire Acquisition Date), Sprint Communications completed the acquisition of the remaining equity interests in Clearwire (as defined below) that it did not already own for approximately $3.5 billion, net of cash acquired, or $5.00 per share (Clearwire Acquisition). The consideration paid was allocated to assets acquired and liabilities assumed based on their estimated fair values at the Clearwire Acquisition Date. The effects of the Clearwire Acquisition are included in the Predecessor period financial information and are therefore included in the allocation of the consideration transferred at the SoftBank Merger Date (as defined below).
	On July 10, 2013 (SoftBank Merger Date), SoftBank Corp. and certain of its wholly-owned subsidiaries (together, "SoftBank") completed the merger (SoftBank Merger) with Sprint Nextel Corporation (Sprint Nextel) contemplated by the Agreement and Plan of Merger, dated as of October 15, 2012 (as amended, the Merger Agreement), and the Bond Purchase Agreement, dated as of October 15, 2012 (as amended, the Bond Agreement). As a result of the SoftBank Merger, Starburst II, Inc. (Starburst II), a wholly-owned subsidiary of SoftBank, became the parent company of Sprint Nextel. Immediately thereafter, Starburst II changed its name to Sprint Corporation and Sprint Nextel changed its name to Sprint Communications, Inc. In addition, in connection with the closing of the SoftBank Merger, Sprint Corporation became the successor registrant to Sprint Nextel under Rule 12g-3 of the Securities Exchange Act of 1934 (Exchange Act) and is the entity subject to the reporting requirements of the Exchange Act for filings with the Securities and Exchange Commission (SEC) subsequent to the close of the SoftBank Merger. In addition, in order to align with SoftBank’s reporting schedule, we changed our fiscal year end to March 31, effective March 31, 2014. As a result, this annual report also includes the three-month transition period of January 1, 2014 through March 31, 2014 as well as the comparable three-month unaudited period of January 1, 2013 through March 31, 2013. References herein to fiscal year 2014 and 2015 refer to the twelve-month periods ending March 31, 2015 and 2016, respectively. See Note 3. Significant Transactions for additional information regarding the SoftBank Merger and related transactions. Unless the context otherwise requires, references to "Sprint," "we," "us," "our" and the "Company" mean Sprint Corporation and its consolidated subsidiaries for all periods presented, inclusive of Successor and Predecessor periods described below, and references to "Sprint Communications" are to Sprint Communications, Inc. and its consolidated subsidiaries.
	In connection with the change of control, as a result of the SoftBank Merger, Sprint Communications' assets and liabilities were adjusted to fair value on the closing date of the SoftBank Merger. The consolidated financial statements distinguish between the predecessor period (Predecessor) relating to Sprint Communications for periods prior to the SoftBank Merger and the successor period (Successor) relating to Sprint Corporation, formerly known as Starburst II, for periods subsequent to the incorporation of Starburst II on October 5, 2012. The Successor financial information represents the activity and accounts of Sprint Corporation, which includes the activity and accounts of Starburst II prior to the SoftBank Merger Date and Sprint Communications, inclusive of the consolidation of Clearwire Corporation and its wholly-owned subsidiary Clearwire Communications LLC (together, "Clearwire"), prospectively following the SoftBank Merger Date beginning on July 11, 2013 (Post-merger period). The accounts and operating activity of Starburst II prior to the SoftBank Merger Date primarily related to merger expenses that were incurred in connection with the SoftBank Merger (recognized in selling, general and administrative expense) and interest related to the $3.1 billion convertible bond (Bond) Sprint Communications, Inc. issued to Starburst II. The Predecessor financial information represents the historical basis of presentation for Sprint Communications for all periods prior to the SoftBank Merger Date. As a result of the valuation of assets acquired and liabilities assumed at fair value at the SoftBank Merger Date, the financial statements for the Successor period are presented on a measurement basis different than the Predecessor period (Sprint Communications historical cost) and are, therefore, not comparable.

Summary_of_Significant_Account

Summary of Significant Accounting Policies and Other Information (Notes)	12 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and Other Information	Summary of Significant Accounting Policies and Other Information
	Basis of Consolidation and Estimates
	The consolidated financial statements include our accounts, those of our 100% owned subsidiaries, and subsidiaries we control or in which we have a controlling financial interest. All intercompany transactions and balances have been eliminated in consolidation. Prior to the Clearwire Acquisition Date, we applied the equity method of accounting to the investment in Clearwire because we did not have a controlling vote or the ability to control operating and financial policies.
	The consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP). This requires management of the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements. Significant estimates and assumptions are used for, but are not limited to, allowance for doubtful accounts, estimated economic lives and residual values of property, plant and equipment, fair value of identified purchased tangible and intangible assets in a business combination, fair value assessments for purposes of impairment testing, valuation of guarantee liabilities and litigation reserves.
	Certain prior period amounts have been reclassified to conform to the current period presentation, including separately presenting Service revenue and Equipment revenue from Net operating revenues and separately presenting Cost of services and Cost of products from Net operating expenses.
	Change in Estimate
	When estimating the value of returned inventory, we evaluate many factors and obtain information to support the estimated value of used devices and the useful lives. Recently, we have observed sustained value and extended useful lives for handsets leading to an increase in the estimated value for returned inventory. As a result, we revised our methodology and assumptions used in estimating the value for returned handsets during the year ended March 31, 2015.
	The change in estimate was accounted for on a prospective basis. The effect of the change in estimate, which was included in "Cost of products" in our consolidated statements of operations, reduced our operating loss by approximately $80 million, or $0.02 per basic and diluted share, for the year ended March 31, 2015. In addition, this change resulted in an increase to "Device and accessory inventory" on the consolidated balance sheet of approximately $80 million.
	Summary of Significant Accounting Policies
	Cash and Cash Equivalents
	Cash equivalents generally include highly liquid investments with maturities at the time of purchase of three months or less. These investments may include money market funds, certificates of deposit, U.S. government and government-sponsored debt securities, corporate debt securities, municipal securities, bank-related securities, and credit and debit card transactions in process. The carrying amounts approximate fair value.
	Installment Receivables
	The carrying value of installment receivables approximates fair value because the receivables are recorded at their present value, net of the deferred interest and allowance for credit losses. At the time of sale, we impute the interest on the installment receivable and record it as a reduction to revenue and as a reduction to the face amount of the related receivable. Interest income is recognized over the term of the installment contract as service revenue.
	We categorize our installment receivables as prime and subprime based upon subscriber credit profiles and as unbilled, billed-current and billed-past due based upon the age of the receivable. We use proprietary scoring systems that measure the credit quality of our receivables using several factors, such as credit bureau information, subscriber credit risk scores and service plan characteristics. Payment history is subsequently monitored to further evaluate credit profiles. Prime subscriber receivables are those with lower delinquency risk and subprime subscriber receivables are those with higher delinquency risk. Subscribers within the subprime category may be required to pay a down payment on their device and accessory purchases. Installment receivables for which invoices have not yet been generated for the customer are considered unbilled. Installment receivables for which invoices have been generated but which are not past the contractual due date are considered billed - current. Installment receivables for which invoices have been generated and the payment is approximately ten days past the contractual due date are considered billed - past due. Account balances are written-off if collection efforts are unsuccessful and future collection is unlikely based on the length of time from the day accounts become past due.
	Allowance for Doubtful Accounts
	An allowance for doubtful accounts is established to cover probable and reasonably estimable losses. Because of the number of subscriber accounts, it is not practical to review the collectability of each of those accounts individually to determine the amount of allowance for doubtful accounts each period, although some account level analysis is performed with respect to large wireless and wireline subscribers. The estimate of allowance for doubtful accounts considers a number of factors, including collection experience, installment billing arrangements, aging of the accounts receivable portfolios, credit quality of the subscriber base and other qualitative considerations, including macro-economic factors. Account balances are written-off if collection efforts are unsuccessful and future collection is unlikely based on the length of time from the day accounts become past due. Amounts written off against the allowance for doubtful accounts, net of recoveries and other adjustments, were $752 million, $106 million and $98 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, and $374 million, $105 million, and $549 million, for the Predecessor 191-day period ended July 10, 2013, the unaudited three-month period ended March 31, 2013, and year ended December 31, 2012, respectively. See Note 4. Installment Receivables for additional information as it relates to the allowance for doubtful accounts specifically attributable to installment receivables.
	Device and Accessory Inventory
	Inventories are stated at the lower of cost or market. Cost is determined by the first-in, first-out (FIFO) method. The Company sells wireless devices separately or in conjunction with a service contract. When the device is sold below cost, the cost and related revenues generated from the device sales (equipment net subsidy) are recognized at the time of sale. Expected equipment net subsidy is not recognized prior to the time of sale because the promotional discount decision is generally made at the point of sale and because the equipment net subsidies are expected to be recovered through service revenues.
	The net realizable value of devices and other inventory is analyzed on a regular basis. This analysis includes assessing obsolescence, sales forecasts, product life cycle, marketplace and other considerations. If assessments regarding the above factors adversely change, we may sell devices at a higher subsidy or record a write-down to inventory for obsolete or slow-moving items prior to the point of sale.
	Property, Plant and Equipment
	Property, plant and equipment (PP&E), including improvements that extend useful lives, are recognized at cost. Depreciation on property, plant and equipment is generally calculated using the straight-line method based on estimated economic useful lives of 3 to 30 years for buildings and improvements and network equipment, site costs and related software and 3 to 12 years for non-network internal use software, office equipment and other. Leasehold improvements are depreciated over the shorter of the lease term or the estimated useful life of the respective assets. Leased devices are depreciated using the straight-line method to their estimated residual value at the end of the term of the lease, which ranges from 12 to 30 months. We calculate depreciation on certain network assets using the group life method. Accordingly, ordinary asset retirements and disposals on those assets are charged against accumulated depreciation with no gain or loss recognized. Gains or losses associated with all other asset retirements or disposals are recognized in the consolidated statements of operations. Depreciation rates for assets are revised periodically to account for changes, if any, related to management's strategic objectives, technological changes, estimated residual values, or obsolescence. Changes in our estimates will result in adjustment to depreciation prospectively over the estimated useful lives of our non-leased assets and over the remaining lease term for devices leased to our customers. Repair and maintenance costs and research and development costs are expensed as incurred.
	We capitalize costs for network and non-network software developed or obtained for internal use during the application development stage. These costs are included in PP&E and, when the software is placed in service, are depreciated over estimated useful lives of three to five years. Costs incurred during the preliminary project and post-implementation stage, as well as maintenance and training costs, are expensed as incurred.
	Long-Lived Asset Impairment
	Sprint evaluates long-lived assets, including intangible assets subject to amortization, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. Asset groups are determined at the lowest level for which identifiable cash flows are largely independent of cash flows of other groups of assets and liabilities. When the carrying amount of a long-lived asset group is not recoverable and exceeds its fair value, an impairment loss is recognized equal to the excess of the asset group’s carrying value over the estimated fair value. See Note 6. Property, Plant and Equipment for additional information on long-lived asset impairments.
	Certain assets that have not yet been deployed in the business, including network equipment, cell site development costs and software in development, are periodically assessed to determine recoverability. Network equipment and cell site development costs are expensed whenever events or changes in circumstances cause the Company to conclude the assets are no longer needed to meet management's strategic network plans and will not be deployed. Software development costs are expensed when it is no longer probable that the software project will be deployed. Network equipment that has been removed from the network is also periodically assessed to determine recoverability. If we experience significant operational challenges, including retaining and attracting subscribers, future cash flows of the Company may not be sufficient to recover the carrying value of our wireless asset group, and we could record asset impairments that are material to Sprint's consolidated results of operations and financial condition.
	Indefinite-Lived Intangible Assets
	Our indefinite-lived intangible assets primarily consist of goodwill, certain of our trademarks and FCC licenses. Goodwill represents the excess of consideration paid over the estimated fair value of the net tangible and identifiable intangible assets acquired in business combinations. In determining whether an intangible asset, other than goodwill, is indefinite-lived, we consider the expected use of the assets, the regulatory and economic environment within which they are being used, and the effects of obsolescence on their use. We assess our indefinite-lived intangible assets, including goodwill, for impairment at least annually or, if necessary, more frequently, whenever events or changes in circumstances indicate the asset may be impaired.
	These analyses, which include the determination of fair value, require considerable judgment and are highly sensitive to changes in underlying assumptions. Consequently, there can be no assurance that the estimates and assumptions made for the purposes of estimating the fair values of our indefinite-lived assets, including goodwill, will prove to be an accurate prediction of the future. Continued, sustained declines in the Company’s operating results, future forecasted cash flows, growth rates and other assumptions, as well as significant, sustained declines in the Company’s stock price and related market capitalization could impact the underlying key assumptions and our estimated fair values, potentially leading to a future material impairment of goodwill or other indefinite-lived intangible assets. See Note 7. Intangible Assets for additional information on indefinite-lived intangible asset impairments.
	Guarantee Liabilities
	Under certain of our wireless service plans, we offer an option to our subscribers to purchase, on a monthly basis, an annual trade-in right (the option). At the trade-in date, a subscriber, who has elected to purchase a device in an installment billing arrangement, will receive a credit in the amount of the outstanding balance of the remaining installment payments provided the subscriber trades-in an eligible used device in good working condition and purchases a new device from Sprint. Additionally, the subscriber must have purchased the option for the twelve consecutive months preceding the trade-in. When a subscriber elects the option, the total estimated arrangement proceeds associated with the subscriber are reduced by the estimated fair value of the fixed-price trade-in credit (guarantee liability) and the remaining proceeds are allocated amongst the other deliverables in the arrangement. The guarantee liability is estimated based on assumptions, including, but not limited to, the expected fair value of the used device at trade-in, subscribers’ estimated remaining balance of the installment receivable, and the probability and timing of the trade-in. When the subscriber elects to exercise the trade-in right, the difference between the outstanding balance of the installment receivable and the estimated fair value of the returned device is recorded as a reduction of the guarantee liability. If the subscriber elects to stop purchasing the option prior to, or after, becoming eligible to exercise the trade-in right, we recognize the amount of the associated guarantee liability as operating revenue. At each reporting date, we reevaluate our estimate of the guarantee liability. If all subscribers, who elected the option, were to claim their benefit at the earliest contractual time of eligible trade-in, the maximum amount of the guarantee liability (i.e., the estimated unpaid balance of the subscribers' installment contracts) would be approximately $248 million as of March 31, 2015. This amount is not an indication of the Company's expected loss exposure because it does not consider the expected fair value of the used handset, which is required to be returned to us in good working condition at trade-in, nor does it consider the probability and timing of trade-in. The total guarantee liabilities associated with the option, which are recorded in "Accrued expenses and other current liabilities" in the consolidated balance sheets, were immaterial.
	Benefit Plans
	We provide a defined benefit pension plan and certain other postretirement benefits to certain employees, and we sponsor a defined contribution plan for all employees.
	In June 2014, the Company’s Board of Directors approved a plan amendment to the Sprint Retirement Pension Plan (the Plan) to offer certain terminated participants, who had not begun to receive Plan benefits, the opportunity to voluntarily elect to receive their benefits as an immediate lump sum distribution. Upon expiration of the election period and completion of cash payments on November 28, 2014, the lump sum distribution, totaling approximately $560 million, created a settlement event that resulted in a $59 million charge, which is reflected in "Other, net" in the consolidated statements of operations, and a reduction in the projected benefit obligation of approximately $300 million, impacted by the settlement as well as a change in the mortality tables and a change in the discount rate used to estimate the projected benefit obligation.
	As of March 31, 2015 and 2014, the fair value of our pension plan assets and certain other postretirement benefit plan assets in aggregate was $1.3 billion and $1.8 billion, respectively, and the fair value of our projected benefit obligations in aggregate was $2.2 billion and $2.4 billion, respectively. As a result, the plans were underfunded by approximately $900 million and $600 million at March 31, 2015 and 2014, respectively, and were recorded as a net liability in our consolidated balance sheets. Estimated contributions totaling approximately $8 million are expected to be paid during the fiscal year 2015.
	The offset to the pension liability is recorded in equity as a component of "Accumulated other comprehensive loss," net of tax, including $393 million, $147 million, and $93 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014, year ended December 31, 2013, respectively, which is amortized to "Selling, general and administrative" in Sprint's consolidated statements of operations. The change in the net liability of the Plan in the Successor year ended March 31, 2015 was affected by the impact of the settlement event on the projected benefit obligation combined with a change in the discount rate used to estimate the projected benefit obligation, decreasing from 4.9% for the Successor three-month transition period ended March 31, 2014 to 4.2% for the Successor year ended March 31, 2015. The change in the net liability of the Plan in the Successor three-month transition period ended March 31, 2014 and year ended December 31, 2013 was affected primarily by a change in the discount rate used to estimate the projected benefit obligation, decreasing from 5.3% to 4.9% for the Successor three-month transition period ended March 31, 2014. We intend to make future cash contributions to the Plan in an amount necessary to meet minimum funding requirements according to applicable benefit plan regulations.
	As of December 31, 2005, the Plan was amended to freeze benefit plan accruals for participants. The objective for the investment portfolio of the pension plan is to achieve a long-term nominal rate of return, net of fees, which exceeds the plan's long-term expected rate of return on investments for funding purposes which was 7.75% at March 31, 2015 and 2014. To meet this objective, our investment strategy for the year ended March 31, 2015 was governed by an asset allocation policy, whereby a targeted allocation percentage is assigned to each asset class as follows: 38% to U.S. equities; 16% to international equities; 28% to fixed income investments; 9% to real estate investments; and 9% to other investments including hedge funds. Actual allocations are allowed to deviate from target allocation percentages within a range for each asset class as defined in the investment policy.
	Investments of the Plan are measured at fair value on a recurring basis which is determined using quoted market prices or estimated fair values. As of March 31, 2015, 47% of the investment portfolio was valued at quoted prices in active markets for identical assets; 35% was valued using quoted prices for similar assets in active or inactive markets, or other observable inputs; and 18% was valued using unobservable inputs that are supported by little or no market activity.
	Under our defined contribution plan, participants may contribute a portion of their eligible pay to the plan through payroll withholdings. For the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014, and the year ended December 31, 2013, the Company matched 100% of the participants' pre-tax and Roth contribution (in aggregate) on the first 3% of eligible compensation and 50% of the participants' pre-tax and Roth contribution (in aggregate) on the next 2% of eligible compensation up to a maximum matching contribution of 4%. For the Predecessor year ended December 31, 2012, the Company matched 50% of participants' contributions up to 2% of their eligible compensation. Fixed matching contributions totaled approximately $71 million, $15 million and $35 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $32 million, $15 million, and $30 million for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013, and year ended December 31, 2012, respectively. Prior to 2013, the Company also made a discretionary matching contribution, as determined by the Board of Directors of the Company, equal to 100% of participants' contributions up to 3.95% of eligible compensation, or $60 million, in the Predecessor year ended December 31, 2012 based upon the attainment of certain profitability levels.
	Revenue Recognition
	Operating revenues primarily consist of wireless service revenues, revenues generated from device and accessory sales, revenues from leasing a device, revenues from wholesale operators and third-party affiliates, as well as long distance voice, data and Internet revenues. Service revenues consist of fixed monthly recurring charges, variable usage charges and miscellaneous fees such as activation fees, directory assistance, roaming, equipment protection, late payment and early termination charges, interest, and certain regulatory related fees, net of service credits and other adjustments. We generally recognize service revenues as services are rendered, assuming all other revenue recognition criteria are met. We recognize revenue for access charges and other services charged at fixed amounts ratably over the service period, net of credits and adjustments for service discounts, billing disputes and fraud or unauthorized usage. As a result of the cutoff times of our multiple billing cycles each month, we are required to estimate the amount of subscriber revenues earned but not billed from the end of each billing cycle to the end of each reporting period. These estimates are based primarily on rate plans in effect and our historical usage and billing patterns. Regulatory fees and costs are recorded gross. The largest component of the regulatory fees is the universal service fund, which represented no more than 2% of net operating revenues for all periods presented in the consolidated statements of operations.
	We recognize equipment revenue and corresponding costs of devices when title and risk of loss passes to the indirect dealer or end-use subscriber. For arrangements involving multiple deliverables such as equipment and service, revenue is allocated to the deliverables based on their relative selling prices. Equipment revenue is limited to the amount of non-contingent consideration received when the device is sold to a subscriber. Equipment revenue is also reduced by the estimated amount of imputed interest associated with installment receivables for subscribers who elect to finance the purchase of a device for up to a 24-month period. Often, we subsidize the cost of the device as an incentive to retain and acquire subscribers. The cost of these incentives is recorded as a reduction to revenue upon activation of the device and a service contract.
	Qualified subscribers can lease a device for a contractual period of time. At the end of the lease term, subscribers have the option to turn in their devices, continue leasing their device or purchase the device. Accounting for device leases involves specific determinations under applicable lease accounting standards, which involve complex and prescriptive provisions. These provisions impact the timing and amount of revenue recognized for our leased devices. The critical elements that are considered with respect to our lease accounting are the economic life of the device and the fair value of the device, including the residual value. We only lease devices to qualifying subscribers that also purchase a service plan. To date, substantially all of our device leases were classified as operating leases. Revenues under these arrangements are allocated considering the relative fair values of the lease and non-lease elements included in the multiple-element arrangement. The amount of the arrangement consideration allocated to the operating lease element is recognized ratably over the lease term, which is typically two years.
	If a multiple-element arrangement includes an option to purchase, on a monthly basis, an annual trade-in right, the amount of the total arrangement consideration is reduced by the estimated fair value of the trade-in right or the guarantee and the remaining proceeds are then allocated amongst the other deliverables in the arrangement.
	The accounting estimates related to the recognition of revenue require us to make assumptions about numerous factors such as future billing adjustments for disputes with subscribers, unauthorized usage, future returns, mail-in rebates on device sales, the fair value of a trade-in right and the total arrangement consideration.
	Dealer Commissions
	Cash consideration given by us to a dealer or end-use subscriber is presumed to be a reduction of revenue unless we receive, or will receive, an identifiable benefit in exchange for the consideration, and the fair value of such benefit can be reasonably estimated, in which case the consideration will generally be recorded as a selling expense or a purchase of inventory. We compensate our dealers using specific compensation programs related to the sale of our devices and our subscriber service contracts, or both. When a commission is earned by a dealer solely due to a selling activity relating to wireless service, the cost is recorded as a selling expense. When a commission is earned by a dealer due to the dealer selling devices purchased from us, the cost is recorded as a reduction to equipment revenue. Commissions are generally earned upon sale of device, service, or both, to an end-use subscriber. Incentive payments to dealers for sales associated with devices and service contracts are classified as contra-revenue, to the extent the incentive payment is reimbursement of loss on the device, and selling expense for the amount associated with the selling effort. Incentive payments to certain indirect dealers who purchase devices from other sources, such as the original equipment manufacturer (OEM), are recognized as selling expense when the device is activated with a Sprint service plan because Sprint does not recognize any equipment revenue or cost of products for those transactions.
	Severance and Exit Costs
	Liabilities for severance and exit costs are recognized based upon the nature of the cost to be incurred. For involuntary separation plans that are completed within the guidelines of our written involuntary separation plan, a liability is recognized when it is probable and reasonably estimable. For voluntary separation plans (VSP) a liability is recognized when the VSP is irrevocably accepted by the employee. For one-time termination benefits, such as additional severance pay or benefit payouts, and other exit costs, such as lease termination costs, the liability is measured and recognized initially at fair value in the period in which the liability is incurred, with subsequent changes to the liability recognized as adjustments in the period of change. Severance and exit costs associated with business combinations are recorded in the results of operations when incurred.
	Compensation Plans
	As of March 31, 2015, Sprint sponsored three incentive plans: the 2007 Omnibus Incentive Plan (2007 Plan); the 1997 Long-Term Incentive Program (1997 Program); and the Nextel Incentive Equity Plan (Nextel Plan) (together, "Compensation Plans"). Sprint also sponsors an Employee Stock Purchase Plan (ESPP). Under the 2007 Plan, we may grant share and non-share based awards, including stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units and other equity-based and cash awards to employees, outside directors and other eligible individuals as defined by the plan. As of March 31, 2015, the number of shares available and reserved for future grants under the 2007 Plan and ESPP totaled approximately 172 million common shares. The Compensation Committee of our board of directors, or one or more executive officers should the Compensation Committee so authorize, as provided in the 2007 Plan, will determine the terms of each share and non-share based award. No new grants can be made under the 1997 Program or the Nextel Plan. We use new shares to satisfy share-based awards or treasury shares, if available.
	The fair value of each option award is estimated on the grant date using the Black-Scholes option valuation model, based on several assumptions including the risk-free interest rate, volatility, expected dividend yield and expected term. During the Successor year ended March 31, 2015, the Company granted approximately 23 million stock options with a weighted average grant date fair value of $3.09 per share based upon assumptions of a risk free interest rate from 1.80% to 2.06%, weighted average expected volatility from 47.0% to 59.1%, expected dividend yield of 0% and expected term from 5.5 years years to 6.5 years years. In general, options are granted with an exercise price equal to the market value of the underlying shares on the grant date, vest on an annual basis over three years, and have a contractual term of ten years. As of March 31, 2015, 40 million options were outstanding, of which 19 million options were exercisable.
	The fair value of each restricted stock unit award is calculated using the share price at the date of grant. Restricted stock units generally have performance and service requirements or service requirements only with vesting periods ranging from one to three years. Employees and directors who are granted restricted stock units are not required to pay for the shares but generally must remain employed with us, or continue to serve as a member of our board of directors, until the restrictions lapse, which is typically three years for employees and one year for directors. Certain restricted stock units outstanding as of March 31, 2015, are entitled to dividend equivalents paid in cash, if dividends are declared and paid on common shares, but performance-based restricted stock units are not entitled to dividend equivalent payments until the applicable performance and service criteria have been met. During the Successor year ended March 31, 2015, the Company granted approximately 6 million service only and performance-based restricted stock units with a weighted average grant date fair value of $7.39 per share. At March 31, 2015, approximately 17 million restricted stock unit awards were outstanding.
	Compensation Costs
	The cost of employee services received in exchange for share-based awards classified as equity is measured using the estimated fair value of the award on the date of the grant, and that cost is recognized over the period that the award recipient is required to provide service in exchange for the award. Awards of instruments classified as liabilities are measured at the estimated fair value at each reporting date through settlement.
	Pre-tax share and non-share based compensation charges from our incentive plans included in net loss were $86 million, $35 million and $98 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014, and the year ended December 31, 2013, respectively, and $37 million, $17 million and $82 million for the Predecessor 191-day period ended July 10, 2013, unaudited three month-period ended March 31, 2013 and year ended December 31, 2012, respectively. The net income tax benefit (expense) recognized in the consolidated financial statements for share-based compensation awards was $34 million, $12 million and $34 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $2 million, $(1) million and $14 million for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period March 31, 2013 and year ended December 31, 2012, respectively. As of March 31, 2015, there was $76 million of total unrecognized compensation cost related to non-vested incentive awards that are expected to be recognized over a weighted average period of 1.75 years.
	Advertising Costs
	We recognize advertising expense when incurred as selling, general and administrative expense. Advertising expenses totaled $1.5 billion, $408 million and $697 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $858 million, $409 million and $1.4 billion for the Predecessor 191-day period ended July 10, 2013, the unaudited three-month period March 31, 2013 and year ended December 31, 2012, respectively.
	New Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (FASB) issued authoritative guidance regarding Reporting of Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. The updated guidance defines discontinued operations as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has, or will have, a major effect on an entity’s operations and financial results. Additionally, the disclosure requirements for discontinued operations were expanded and new disclosures for individually significant dispositions that do not qualify as discontinued operations are required. The guidance is effective prospectively for fiscal years and interim reporting periods within those years beginning after December 15, 2014, with early adoption permitted for transactions that have not been reported in financial statements previously issued or available for issuance. The standard will be effective for the Company's fiscal year beginning April 1, 2015 and will be applied to relevant future transactions.
	In May 2014, the FASB issued new authoritative literature, Revenue from Contracts with Customers. The issuance is part of a joint effort by the FASB and the International Accounting Standards Board (IASB) to enhance financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards and, thereby, improving the consistency of requirements, comparability of practices and usefulness of disclosures. The new standard will supersede much of the existing authoritative literature for revenue recognition. As currently written, the standard and related amendments will be effective for the Company for its annual reporting period beginning April 1, 2017, including interim periods within that reporting period, and early application is not permitted. In April 2015, the FASB issued a proposal to defer the effective date of the new literature by one year but allow companies to early adopt according to the original effective date. Entities are allowed to transition to the new standard by either retrospective application or recognizing the cumulative effect. The Company is currently evaluating the guidance, including which transition approach will be applied and the estimated impact it will have on our consolidated financial statements.
	In June 2014, the FASB issued authoritative guidance regarding Compensation - Stock Compensation, which provides guidance on how to treat performance targets that can be achieved after the requisite service period. The updated guidance requires that a performance target that affects vesting and could be achieved after the requisite service period be treated as a performance condition and accounted for under current guidance as opposed to a nonvesting condition that would impact the grant-date fair value of the award. The guidance is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015 with early adoption permitted. Entities may apply the amendments either (i) prospectively to all awards granted or modified after the effective date; or (ii) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter with the cumulative effect as an adjustment to the opening retained earnings balance as of the beginning of the earliest annual period presented. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.
	In August 2014, the FASB issued authoritative guidance regarding Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which requires management to assess an entity’s ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. The updated guidance requires management to perform interim and annual assessments on whether there are conditions or events, considered in the aggregate, that raise substantial doubt about an entity’s ability to continue as a going concern within one year after the date that the financial statements are issued and to provide related disclosures, if required. The standard will be effective for the Company’s fiscal year ending March 31, 2017, although early adoption is permitted. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.
	In January 2015, the FASB issued authoritative guidance on Extraordinary and Unusual Items, eliminating the concept of extraordinary items. The issuance is part of the FASB’s initiative to reduce complexity in accounting standards. Under the current guidance, an entity is required to separately classify, present and disclose events and transactions that meet the criteria for extraordinary classification. Under the new guidance, reporting entities will no longer be required to consider whether an underlying event or transaction is extraordinary, however, presentation and disclosure guidance for items that are unusual in nature or occur infrequently was retained and expanded to include items that are both unusual in nature and infrequently occurring. The amendments are effective for the Company’s fiscal year beginning April 1, 2016, although early adoption is permitted if applied from the beginning of a fiscal year. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.
	In February 2015, the FASB issued authoritative guidance regarding Consolidation, which provides guidance to management when evaluating whether they should consolidate certain legal entities. The updated guidance modifies evaluation criteria of limited partnerships and similar legal entities, eliminates the presumption that a general partner should consolidate a limited partnership, and affects the consolidation analysis of reporting entities that are involved with variable interest entities, particularly those that have fee arrangements and related party relationships. All legal entities will be subject to reevaluation under the revised consolidation model. The standard will be effective for the Company’s annual reporting period beginning April 1, 2016, including interim periods within that reporting period, although early adoption is permitted. The Company is currently evaluating the newly issued guidance and assessing the impact it will have on our consolidated financial statements.
In April 2015, the FASB issued authoritative guidance regarding Interest - Imputation of Interest, which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The guidance is effective for fiscal years and interim reporting periods within those years beginning after December 31, 2015, with early adoption permitted. The standard will be effective for the Company’s fiscal year beginning April 1, 2016. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.

Significant_Transactions_Notes

Significant Transactions (Notes)	12 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Significant Transactions	Significant Transactions
	Acquisition of Remaining Interest in Clearwire
	On July 9, 2013, Sprint Communications completed the Clearwire Acquisition. The cash consideration paid totaled approximately $3.5 billion, net of cash acquired of $198 million. Approximately $125 million of the cash consideration is accrued for within "Accrued expenses and other current liabilities" on the consolidated balance sheet for dissenting shares relating to stockholders who exercised their appraisal rights.
	The fair value of consideration, which is measured at the estimated fair value of each element of consideration transferred as of the Clearwire Acquisition Date, was determined as the sum of (a) approximately $3.7 billion of cash transferred to Clearwire stockholders, which included $125 million of cash relating to dissenting shares, (b) approximately $3.3 billion representing the estimated fair value of Clearwire shares held by Sprint Communications immediately preceding the acquisition and (c) approximately $59 million of share-based payment awards (replacement awards) exchanged for awards held by Clearwire employees.
	Purchase Price Allocation
	The consideration transferred was allocated to assets acquired and liabilities assumed based on their estimated fair values at the Clearwire Acquisition Date. The allocation of consideration transferred was based on management's judgment after evaluating several factors, including a valuation assessment. Management finalized its purchase price allocation during the quarter ended June 30, 2014. Adjustments made since the initial purchase price allocation decreased recorded goodwill by approximately $269 million and were primarily attributable to a reduction of approximately $270 million made to deferred tax liabilities as a result of additional analysis. The remaining adjustments were insignificant.
	The following table summarizes the purchase price allocation of consideration in the Clearwire Acquisition:
	Purchase Price Allocation (in millions):
	Current assets	$	778
	Property, plant and equipment	1,245
	Identifiable intangibles	12,870
	Goodwill	437
	Other assets	25
	Current liabilities	(1,070		)
	Long-term debt	(4,288		)
	Deferred tax liabilities	(2,130		)
	Other liabilities	(876		)
	Net assets acquired	$	6,991
	SoftBank Transaction
	As discussed above, the SoftBank Merger was completed on July 10, 2013. Sprint Communications, Inc. stockholders received consideration in a combination of both cash and stock, subject to proration. Cash consideration paid in the SoftBank Merger was $14.1 billion, net of cash acquired of $2.5 billion and the estimated fair value of the 22% interest in Sprint Corporation issued to the then existing stockholders of Sprint Communications, Inc.
	In addition, pursuant to the Bond Agreement, on October 15, 2012, Sprint Communications, Inc. issued a Bond to Starburst II with a principal amount of $3.1 billion, interest rate of 1%, and maturity date of October 15, 2019, which was converted into 590,476,190 shares of Sprint Communications, Inc. common stock at $5.25 per share immediately prior to the SoftBank Merger Date. As a result of the completion of the SoftBank Merger and subsequent open market stock purchases, SoftBank owned approximately 79% of the outstanding voting common stock of Sprint Corporation and other Sprint stockholders own the remaining approximately 21% as of March 31, 2015.
	Consideration Transferred and Investments by SoftBank
	The fair value of consideration transferred, which is measured at the estimated fair value of each element of consideration transferred as of the SoftBank Merger Date, was determined as the sum of (a) approximately $16.6 billion of cash transferred to Sprint Communications, Inc. stockholders, (b) approximately $5.3 billion representing shares of Sprint issued to Sprint Communications, Inc. stockholders and (c) approximately $193 million of share-based payment awards (replacement awards) exchanged for awards held by Sprint employees.
	Additionally, SoftBank invested approximately $5.0 billion in the form of a capital contributions to Sprint. The fair value of the investments by SoftBank was determined based on the cash transferred, including $3.1 billion to purchase the Bond and $1.9 billion at the SoftBank Merger Date.
	Purchase Price Allocation
	The consideration transferred was allocated to assets acquired and liabilities assumed based on their estimated fair values as of the SoftBank Merger Date, inclusive of the Clearwire Acquisition described above. The excess of the consideration transferred over the estimated fair values of assets acquired and liabilities assumed was recorded as goodwill. Goodwill resulting from the SoftBank Merger is allocated to the Wireless segment. The allocation of consideration transferred was based on management's judgment after evaluating several factors, including a valuation assessment. Management finalized its purchase price allocation during the quarter ended June 30, 2014. Adjustments made since the initial purchase price allocation decreased recorded goodwill by approximately $476 million. Indefinite-lived intangible assets increased by approximately $300 million due to additional analysis performed by management during the quarter ended December 31, 2013 and the quarter ended June 30, 2014 related to the value assigned to certain FCC licenses. The remainder of the decrease was due to insignificant changes in various accounts.
	The following table summarizes the purchase price allocation of consideration transferred:
	Purchase Price Allocation (in millions):
	Current assets	$	8,576
	Investments	133
	Property, plant and equipment	14,558
	Identifiable intangibles	50,672
	Goodwill	6,343
	Other assets	244
	Current liabilities	(10,623		)
	Long-term debt	(29,481		)
	Deferred tax liabilities	(14,256		)
	Other liabilities	(3,989		)
	Net assets acquired, prior to conversion of the Bond	22,177
	Conversion of Bond	3,100
	Net assets acquired, after conversion of the Bond	$	25,277
	Pro Forma Financial Information
	The following unaudited pro forma consolidated results of operations assume that the SoftBank Merger and Clearwire Acquisition were completed as of January 1, 2012.
		Years Ended December 31,
		2013			2012
		(in millions)
	Net operating revenues	$	35,953		$	35,918
	Net loss	$	(4,290	)	$	(5,141	)
	Basic loss per common share	$	(1.12	)	$	(1.35	)
	The unaudited pro forma financial information was prepared to illustrate the pro forma effect of the combination of Sprint, Sprint Communications and Clearwire using the consideration transferred as of each acquisition date as though the acquisition date for each transaction occurred on January 1, 2012. The preparation of the pro forma financial information also assumed a purchase price allocation of the consideration transferred among the assets acquired and liabilities assumed for each acquiree. The pro forma financial information adjusts the actual combined results for items that are recurring in nature and directly attributable to the Clearwire Acquisition and SoftBank Merger. The pro forma net loss provided excludes certain non-recurring items such as Sprint's gain on its previously held interest in Clearwire and transaction costs associated with the Clearwire Acquisition and SoftBank Merger. As a result, the pro forma financial information presented above excludes a net gain of $1.4 billion and acquisition related costs of approximately $169 million.
	This pro forma financial information has been prepared based on estimates and assumptions, which management believes are reasonable, and is not necessarily indicative of the consolidated financial position or results of operations that Sprint would have achieved had the Clearwire Acquisition and/or the SoftBank Merger actually occurred at January 1, 2012 or at any other historical date, nor is it reflective of our expected actual financial positions or results of operations for any future period.
	Accounts Receivable Facility
	Transaction Overview
	On May 16, 2014, certain wholly-owned subsidiaries of Sprint entered into a two-year committed facility (Receivables Facility) to sell certain accounts receivable (the Receivables) on a revolving basis, subject to a maximum funding limit of $1.3 billion. The available funding varies based on the amount of eligible receivables (as defined in the Receivables Facility). In connection with the Receivables Facility, Sprint formed wholly-owned subsidiaries that are bankruptcy-remote special purpose entities (SPEs). Pursuant to the Receivables Facility, certain Sprint subsidiaries (Originators) transfer Receivables to the SPEs. Receivables contributed by the Originators to the SPEs and available to be sold to the Conduits primarily consisted of installment receivables and wireless service charges due from subscribers. The SPEs then may sell the Receivables to a bank agent on behalf of unaffiliated multi-seller asset-backed commercial paper conduits (Conduits) or their sponsoring banks. Sales of eligible Receivables by the SPEs, once initiated, generally occur daily and are settled on a monthly basis. Sprint pays a fee for the drawn and undrawn portions of the Receivables Facility. A subsidiary of Sprint services the Receivables in exchange for a monthly servicing fee, and Sprint guarantees the performance of the servicer's and the Originators' obligations under the Receivables Facility. The net fees associated with the Receivables Facility are recognized in selling, general and administrative expenses on the consolidated statements of operations. On April 24, 2015, the Receivables Facility was amended to include up to $2.0 billion of additional funding as a result of including installment receivables in the definition of eligible receivables under the Receivables Facility, which had the effect of increasing the maximum funding limit to $3.3 billion, of which $1.4 billion was available to be drawn for cash as of April 30, 2015. Additionally, the expiration date was extended to March 31, 2017.
	Receivables sold to the Conduits are treated as a sale of financial assets. Upon sale, Sprint derecognizes the Receivables, as well as the related allowances, and recognizes the net proceeds received in cash provided by operating activities. The difference between the Receivables sold and the cash received, which represents a financial asset due to Sprint from the Conduits, is realizable by Sprint contingent upon the collections on the sold Receivables.
	On March 31, 2015, of the $3.5 billion of Receivables contributed by the Originators to the SPEs, the SPEs sold approximately $1.8 billion of service Receivables to the Conduits in exchange for $500 million in cash (reflected within the change in accounts and notes receivable on the consolidated statement of cash flows) and a $1.3 billion receivable from the Conduits. The receivable due to Sprint from the Conduits is classified as a trading security and is recorded at its estimated fair value of $1.2 billion in "Prepaid expenses and other current assets" on the consolidated balance sheet. The fair value of the receivable due to Sprint was estimated using a discounted cash flow model, which relied principally on unobservable inputs such as the nature of the sold Receivables and subscriber payment history. Changes in the fair value of the receivable due to Sprint are recognized in operating (loss) income on the consolidated statements of operations. As of March 31, 2015, there was approximately $460 million of available funding under the Receivables Facility. In April 2015, Sprint elected to remit payments received to the Conduits to reduce the funded amount to zero.
	Each SPE’s sole business consists of the purchase or acceptance through capital contributions of the Receivables from the Originators and the subsequent retransfer of, or granting of a security interest in, such Receivables to the bank agent under the Receivables Facility. In addition, each SPE is a separate legal entity with its own separate creditors who will be entitled, prior to and upon the liquidation of the SPE, to be satisfied out of the SPE’s assets prior to any assets or value in the SPE becoming available to the Originators or Sprint. Accordingly, the assets of the SPE, including the $1.7 billion of installment receivables contributed by the Originators and held by the SPEs and the $1.3 billion receivable due to Sprint from the Conduits as of March 31, 2015, are not available to pay creditors of Sprint or any of its affiliates (other than any other SPE), although collections from these receivables in excess of amounts required to pay the investment, yield and fees of the Conduits and other creditors of the SPEs may be remitted to the Originators and Sprint during and after the term of the Receivables Facility.
	Continuing Involvement
	Sprint has continuing involvement in the Receivables sold by the SPEs to the Conduits because a subsidiary of Sprint services the receivables. Additionally, in accordance with the Receivables Facility, Sprint is required to repurchase aged receivables, or those that will be written off in accordance with Sprint's credit and collection policies, both of which result from subscriber non-payment. Sprint recognizes assets and liabilities, as applicable, with respect to its continuing involvement at fair value. Sprint's continuing involvement did not have a material impact on its financial statements as of Mach 31, 2015.
	Variable Interest Entity
	Sprint determined the Conduits are considered variable interest entities because they lack sufficient equity to finance their activities. Sprint's interests in the Receivables purchased by the Conduits, which is comprised of the net receivable due to Sprint, is not considered a variable interest because it is in assets that represent less than 50% of the total activity of the Conduits.

Installment_Receivables_Notes

Installment Receivables (Notes)	12 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Financing Receivables [Text Block]	Installment Receivables
	Certain subscribers have the option to purchase their devices in installments up to a 24-month period. Short-term installment receivables are recorded in "Accounts and notes receivable, net" and long-term installment receivables are recorded in "Other assets" in the consolidated balance sheets.
	The following table summarizes the installment receivables:
		March 31,			March 31,
		2015			2014
		(in millions)
	Installment receivables, gross	$	1,725		$	740
	Deferred interest	(139		)	(77		)
	Installment receivables, net of deferred interest	1,586			663
	Allowance for credit losses	(190		)	(47		)
	Installment receivables, net	$	1,396		$	616
	Classified on the consolidated balance sheets as:
	Accounts and notes receivable, net	$	1,035		$	299
	Other assets	361			317
	Installment receivables, net	$	1,396		$	616
	The balance and aging of installment receivables on a gross basis by credit category were as follows:
		March 31, 2015								March 31, 2014
		Prime			Subprime			Total		Prime		Subprime		Total
		(in millions)
	Unbilled	$	1,243		$	359		$	1,602	$	466	$	242	$	708
	Billed - current	65			22			87		16		9		25
	Billed - past due	21			15			36		5		2		7
	Installment receivables, gross	$	1,329		$	396		$	1,725	$	487	$	253	$	740
	Activity in the deferred interest and allowance for credit losses for the installment receivables for the year ended March 31, 2015, the three months ended March 31, 2014 and since the inception of the program in September 2013 through December 31, 2013 was as follows:
		Year Ended			Three Months Ended			Year Ended
		March 31,			March 31,			December 31,
		2015			2014			2013
		(in millions)
	Deferred interest and allowance for credit losses, beginning of period	$	124		$	13		$	—
	Bad debt expense	398			44			3
	Write-offs, net of recoveries	(255		)	—			—
	Change in deferred interest on short-term and long-term installment receivables	62			67			10
	Deferred interest and allowance for credit losses, end of period	$	329		$	124		$	13

Financial_Instruments_Notes

Financial Instruments (Notes)	12 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Financial Instruments	Financial Instruments
	The carrying amount of cash and cash equivalents, accounts and notes receivable, and accounts payable approximates fair value. Short-term investments (consisting primarily of time deposits, commercial paper, and Treasury securities), totaling approximately $166 million and $1.2 billion as of March 31, 2015 and 2014, respectively, are recorded at amortized cost, and the respective carrying amounts approximate fair value primarily using quoted prices in active markets. The fair value of marketable equity securities totaling $40 million and $50 million as of the periods ended March 31, 2015 and 2014, respectively, are measured on a recurring basis using quoted prices in active markets. The estimated fair value of the majority of our current and long-term debt, excluding our credit facilities, is determined based on quoted prices in active markets or by using other observable inputs that are derived principally from, or corroborated by, observable market data.
	The following table presents carrying amounts and estimated fair values of current and long-term debt:
		Carrying amount at March 31, 2015		Estimated Fair Value Using Input Type
				Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
		(in millions)
	Current and long-term debt	$	33,434	$	27,238	$	4,906	$	1,410	$	33,554
		Carrying amount at March 31, 2014		Estimated Fair Value Using Input Type
				Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
		(in millions)
	Current and long-term debt	$	32,277	$	27,516	$	5,421	$	1,262	$	34,199

Property_Plant_and_Equipment_N

Property, Plant and Equipment (Notes)	12 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment
	Property, plant and equipment consists primarily of network equipment and other long-lived assets used to provide service to our subscribers. As a result of the modernization of our network and shut-down of the Nextel platform, estimated useful lives of related equipment were shortened, causing incremental depreciation charges during this period of implementation. The incremental effect of accelerated depreciation expense totaled approximately $800 million and $360 million for the Predecessor 191-day period ended July 10, 2013 and unaudited three month-period March 31, 2013, respectively, and $2.1 billion for the Predecessor year ended December 31, 2012, of which the majority related to shortened useful lives of Nextel platform assets for all periods.
	The following table presents the components of property, plant and equipment, and the related accumulated depreciation:
		March 31,
		2015			2014
		(in millions)
	Land	$	266		$	265
	Network equipment, site costs and related software	18,990			14,902
	Buildings and improvements	754			745
	Non-network internal use software, office equipment, leased devices and other	2,979			866
	Construction in progress	2,090			1,970
	Less: accumulated depreciation	(5,358		)	(2,449		)
	Property, plant and equipment, net	$	19,721		$	16,299
	Network equipment, site costs and related software includes switching equipment, cell site towers, site development costs, radio frequency equipment, network software, digital fiber optic cable, transport facilities and transmission-related equipment. Buildings and improvements principally consists of owned general office facilities, retail stores and leasehold improvements. Non-network internal use software, office equipment, leased devices and other primarily consists of furniture, information technology systems, equipment and vehicles, and leased devices. Construction in progress, which is not depreciated until placed in service, primarily includes materials, transmission and related equipment, labor, engineering, site development costs, interest and other costs relating to the construction and development of our network. Non-cash accruals included in property, plant and equipment totaled $1.5 billion, $2.0 billion and $2.4 billion for the Successor year ended March 31, 2015, three-months ended March 31, 2014 and year ended December 31, 2013.
	In September 2014, Sprint introduced a leasing program, whereby qualified subscribers can lease a device for a contractual period of time. At the end of the lease term, the subscriber has the option to turn in their device, continue leasing their device, or purchase the device. As of March 31, 2015, substantially all of our device leases were classified as operating leases. At lease inception, the devices leased through Sprint's direct channels are reclassified from inventory to property, plant and equipment. For those devices leased through indirect channels, Sprint will purchase the device to be leased from the retailer at lease inception. The devices are then depreciated using the straight-line method to their estimated residual value at the end of the lease term.
	The following table presents leased devices and the related accumulated depreciation:
		March 31,
		2015			2014
		(in millions)
	Leased devices	$	1,974		$	—
	Less: accumulated depreciation	(197		)	—
	Leased devices, net	$	1,777		$	—
	During the year ended March 31, 2015 there were non-cash additions to leased devices of approximately $1.4 billion along with a corresponding decrease in "Device and accessory inventory" of approximately $1.2 billion and a corresponding increase in "Accounts payable" of approximately $182 million for devices purchased from indirect dealers that were leased to our subscribers.
	As of March 31, 2015, the minimum estimated payments to be received for leased devices were as follows (in millions):
	Fiscal year 2015	$	740
	Fiscal year 2016	505
	Fiscal year 2017	1
	Fiscal year 2018 and thereafter	—
		$	1,246
	Assessment of Impairment
	During the quarter ended December 31, 2014, we tested the recoverability of the Wireline long-lived assets due to continued declines in our Wireline segment earnings and our forecast that projected continued losses in future periods. As a result of the test, we recorded an impairment loss of $233 million, which is included in “Impairments” in our consolidated statements of operations, to reduce the carrying value of the Wireline asset group, which includes the Wireline long-lived assets, to its estimated fair value of $918 million as of our testing date. The fair value of the Wireline long-lived assets was estimated using a market approach, which included significant unobservable inputs including liquidation curves, useful life assumptions, and scrap values. As the assumptions are largely unobservable, the estimate of fair value is considered to be unobservable within the fair value hierarchy.
	We recorded asset impairments of $75 million for the Successor three-month transition period ended March 31, 2014 and $102 million for the Predecessor year ended December 31, 2012, respectively. For the Successor three-month transition period ended March 31, 2014, asset impairments were recorded primarily due to network equipment assets that were no longer necessary as a result of changes in management's strategic plans. Asset impairments in the year ended December 31, 2012 consisted of $18 million of assets associated with a decision to utilize fiber backhaul, which we expect to be more cost effective, rather than microwave backhaul, $66 million of capitalized assets that we no longer intend to deploy as a result of the termination of the spectrum hosting arrangement with LightSquared, and $18 million related to network asset equipment ($13 million Wireless; $5 million Wireline) that is no longer necessary for management's strategic plans.

Intangible_Assets_Notes

Intangible Assets (Notes)	12 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets
	Indefinite-Lived Intangible Assets
	Our indefinite-lived intangible assets consists of FCC licenses, which were acquired primarily through FCC auctions and business combinations, certain of our trademarks, and goodwill. At March 31, 2015, we held 1.9 GHz, 800 MHz and 2.5 GHz FCC licenses authorizing the use of radio frequency spectrum to deploy our wireless services. As long as the Company acts within the requirements and constraints of the regulatory authorities, the renewal and extension of these licenses is reasonably certain at minimal cost. Accordingly, we have concluded that FCC licenses are indefinite-lived intangible assets. Goodwill represents the excess of consideration paid over the estimated fair value of net tangible and identifiable intangible assets acquired in business combinations (see Note 3. Significant Transactions).
	During the quarter ended June 30, 2014, the Company entered into definitive agreements with various counterparties to sell certain FCC licenses held by its Wireless segment. During the quarters ended September 30, 2014 and March 31, 2015, agreements totaling $100 million and $200 million, respectively, received regulatory approval and were settled. These transactions did not have a material impact on the Company's consolidated results of operations.
	The following provides the activity of Indefinite-lived intangible assets within the consolidated balance sheets:
		March 31,				Net					March 31,
		2014				Additions					2015
		(in millions)
	FCC licenses	$	36,043			$	(91	)			$	35,952
	Trademarks	5,935				(1,900		)	(1	)	4,035
	Goodwill	6,383				192			(2	)	6,575
		$	48,361			$	(1,799	)			$	46,562
		December 31,				Net					March 31,
		2013				Additions					2014
		(in millions)
	FCC licenses	$	35,889			$	154				$	36,043
	Trademarks	5,935				—					5,935
	Goodwill	6,434				(51		)	(3	)	6,383
		$	48,258			$	103				$	48,361
	_________________
	-1	Net reduction to trademarks for the year ended March 31, 2015 of approximately $1.9 billion was related to the impairment of the Sprint trade name. See discussion below.
	-2	Net additions to goodwill for the Successor year ended March 31, 2015 of approximately $192 million were the result of purchase price allocation adjustments, which consisted of a $232 million increase recorded during the three-month period ended March 31, 2015 to correct the amount of net deferred tax liabilities recognized in connection with the SoftBank Merger and Clearwire Acquisition and a net $40 million decrease recorded during the three-months ended June 30, 2014, which is also associated with the SoftBank Merger and Clearwire Acquisition.
	-3	Net reduction to goodwill for the Successor three-month transition period ended March 31, 2014 of $51 million was the result of purchase price allocation adjustments associated with the SoftBank Merger.
	Assessment of Impairment
	Our annual impairment testing date for goodwill and indefinite-lived intangible assets is January 1 of each year; however, we test for impairment between our annual tests if an event occurs or circumstances change that indicate that the asset may be impaired, or in the case of goodwill, that the fair value of the reporting unit is below its carrying amount. Since the SoftBank Merger Date, actual results and expectations of net postpaid handset subscriber additions have been lower than the forecasts used to allocate the purchase price to the assets acquired and liabilities assumed. During the quarter ended December 31, 2014, the stock price and our related market capitalization decreased significantly and our credit rating was downgraded by one of the ratings service providers. We also updated our long-term forecasted cash flows for the Company, including for the Wireless reporting unit, during the fourth quarter. This update considered current economic conditions and trends, estimated future operating results, our views of growth rates, anticipated future economic and regulatory conditions, future cost savings initiatives and the availability of the necessary network infrastructure, handsets and other devices. Based on these events and changes in circumstances, we determined that recoverability of the carrying amount of goodwill and the Sprint trade name should be evaluated for impairment.
	The impairment test for an indefinite-lived intangible asset consists of a comparison of the fair value of the asset to its carrying amount. If the carrying amount exceeds its fair value, an impairment loss is recognized equal to that excess. We estimated the fair value of the Sprint trade name assigned to the Wireless segment using the relief-from-royalty method, which uses several significant assumptions, including management projections of future revenue, a royalty rate, a long-term growth rate, and a discount rate. As these assumptions are largely unobservable, the estimate of fair value is considered to be unobservable within the fair value hierarchy. The significant unobservable inputs included projected revenues, a royalty rate, a growth rate of 1.5% in the terminal year and a discount rate of 16%. The carrying value of the Sprint trade name exceeded its estimated fair value of $3.3 billion. Accordingly, during the quarter ended December 31, 2014 we recorded an impairment loss of $1.9 billion, which is included in “Impairments” in our consolidated statements of operations.
	The analysis of potential impairment of goodwill requires a two-step approach. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. We estimated the fair value of the Wireless reporting unit using both discounted cash flow and market-based valuation models. The determination of the fair value of the reporting unit requires significant estimates and assumptions, including significant unobservable inputs. The key inputs include, but are not limited to, a discount rate of 8%, a terminal growth rate of 1.5%, a control premium, market multiple data from selected guideline public companies, management’s internal forecasts which include numerous assumptions such as share of industry gross additions, churn, mix of plans, rate changes, expenses, EBITDA margins, and capital expenditures, among others. We compared the estimated fair value to the carrying amount of the Wireless reporting unit and concluded that the second step of a goodwill impairment test was not required because the estimated fair value exceeded the carrying amount.
	The determination of fair value requires considerable judgment and is highly sensitive to changes in underlying assumptions. Consequently, there can be no assurance that the estimates and assumptions made for the purposes of the goodwill and Sprint trade name impairment tests will prove to be an accurate prediction of the future. Continued, sustained declines in the Company’s operating results, future forecasted cash flows, growth rates and other assumptions, as well as significant, sustained declines in the Company’s stock price and related market capitalization could impact the underlying key assumptions and our estimated fair values, potentially leading to a future material impairment of goodwill or other indefinite-lived intangible assets.
	Intangible Assets Subject to Amortization
	Customer relationships are amortized using the sum-of-the-months' digits method, while all other definite-lived intangible assets are amortized using the straight line method over the estimated useful lives of the respective assets. We reduce the gross carrying value and associated accumulated amortization when specified intangible assets become fully amortized. Amortization expense related to favorable spectrum and tower leases is recognized in cost of services.
				March 31, 2015												March 31, 2014
		Useful Lives		Gross				Accumulated				Net				Gross				Accumulated			Net
				Carrying				Amortization				Carrying				Carrying				Amortization			Carrying
				Value								Value				Value							Value
				(in millions)
	Customer relationships	4 to 8 years		$	6,923			$	(2,791	)		$	4,132			$	6,923			$	(1,289	)	$	5,634
	Other intangible assets:
	Favorable spectrum leases	23 years		884				(71		)		813				884				(30		)	854
	Favorable tower leases	3 to 7 years		589				(189		)		400				589				(80		)	509
	Trademarks	34 years		520				(27		)		493				520				(12		)	508
	Other	4 to 10 years		72				(17		)		55				60				(7		)	53
	Total other intangible assets			2,065				(304		)		1,761				2,053				(129		)	1,924
	Total definite-lived intangible assets			$	8,988			$	(3,095	)		$	5,893			$	8,976			$	(1,418	)	$	7,558
		Fiscal Year 2015				Fiscal Year 2016				Fiscal Year 2017				Fiscal Year 2018				Fiscal Year 2019
		(in millions)
	Estimated amortization expense	$	1,427			$	1,162			$	882			$	665			$	461

LongTerm_Debt_Financing_and_Ca

Long-Term Debt, Financing and Capital Lease Obligations (Notes)	12 Months Ended
	Mar. 31, 2015
Long-term Debt and Capital Lease Obligations [Abstract]
Long-Term Debt, Financing and Capital Lease Obligations	Long-Term Debt, Financing and Capital Lease Obligations
		Interest Rates			Maturities			March 31,			March 31,
								2015			2014
								(in millions)
	Notes
	Senior notes
	Sprint Corporation	7.13	-	7.88%	2021	-	2025	$	10,500		$	9,000
	Sprint Communications, Inc.	6	-	11.50%	2016	-	2022	9,280			9,280
	Sprint Capital Corporation	6.88	-	8.75%	2019	-	2032	6,204			6,204
	Guaranteed notes
	Sprint Communications, Inc.	7	-	9.00%	2018	-	2020	4,000			4,000
	Secured notes
	iPCS, Inc.	3.49%			2014			—			181
	Clearwire Communications LLC (1)	14.75%			2016			300			300
	Exchangeable notes
	Clearwire Communications LLC (1)	8.25%			2040			629			629
	Credit facilities
	Bank credit facility	3.31%			2018			—			—
	Export Development Canada (EDC)	3.5	-	4.08%	2015	-	2019	800			500
	Secured equipment credit facilities	1.85	-	2.20%	2017	-	2022	610			762
	Financing obligation	6.09%			2021			275			327
	Capital lease obligations and other	2.35	-	10.52%	2015	-	2023	127			187
	Net premiums							1,106			1,408
								33,831			32,778
	Less current portion							(1,300		)	(991		)
	Long-term debt, financing and capital lease obligations							$	32,531		$	31,787
	________
	-1	Notes of Clearwire Communications LLC are also direct obligations of Clearwire Finance, Inc. and are guaranteed by certain Clearwire subsidiaries.
	As of March 31, 2015, Sprint Corporation, the parent corporation, had $10.5 billion in aggregate principal amount of senior notes outstanding. In addition, as of March 31, 2015, the outstanding principal amount of senior notes issued by Sprint Communications, Inc. and Sprint Capital Corporation, guaranteed notes issued by Sprint Communications, Inc., exchangeable notes issued by Clearwire Communications LLC, the EDC agreement and the secured equipment credit facilities, totaling $21.5 billion in principal amount of our long-term debt issued by 100% owned subsidiaries, was fully and unconditionally guaranteed by Sprint Corporation. The indentures and financing arrangements governing certain of our subsidiaries' debt contain provisions that limit cash dividend payments on subsidiary common stock. Except in the case of notes issued by and secured by assets of Clearwire Communications LLC, the transfer of cash from subsidiaries to the parent corporation generally is not restricted.
	As of March 31, 2015, approximately $1.3 billion aggregate principal amount of our outstanding debt, comprised of certain notes, financing and capital lease obligations and mortgages, was secured by $14.6 billion of property, plant and equipment and other assets, net. Cash interest payments, net of amounts capitalized of $56 million, $13 million, and $30 million, totaled $2.3 billion, $559 million, and $1.0 billion during the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively. Cash interest payments, net of amounts capitalized of $29 million, $15 million, and $278 million, totaled $814 million, $305 million, and $1.4 billion during the Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013 and year ended December 31, 2012, respectively. Our weighted average effective interest rate related to our notes and credit facilities was 6.1%, 6.2%, and 6.4% for the Successor year ended March 31, 2015, three-month transition period ended March 31, 2014, and year ended December 31, 2013, respectively, and 8.9%, 7.1%, and 7.5% for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013 and year ended December 31, 2012, respectively.
	Notes
	As of March 31, 2015, our outstanding notes consisted of senior notes, guaranteed notes, and exchangeable notes, all of which are unsecured, as well as secured notes of Clearwire Communications LLC, which are secured solely by assets of Clearwire Communications LLC and certain of its subsidiaries. Cash interest on all of the notes is generally payable semi-annually in arrears. As of March 31, 2015, $30.1 billion aggregate principal amount of the notes was redeemable at the Company's discretion at the then-applicable redemption prices plus accrued interest.
	As of March 31, 2015, $21.6 billion aggregate principal amount of our senior notes and guaranteed notes provide holders with the right to require us to repurchase the notes if a change of control triggering event (as defined in the applicable indentures and supplemental indentures) occurs. As of March 31, 2015, $300 million aggregate principal amount of Clearwire Communications LLC notes provide holders with the right to require us to repurchase the notes if a change of control occurs (as defined in the applicable indentures and supplemental indentures). If we are required to make such a change of control offer, we will offer a cash payment equal to 101% of the aggregate principal amount of notes repurchased plus accrued and unpaid interest.
	Upon the close of the Clearwire Acquisition, the Clearwire Communications, LLC 8.25% Exchangeable Notes due 2040 became exchangeable at any time, at the holder’s option, for a fixed amount of cash equal to $706.21 for each $1,000 principal amount of notes surrendered. As a result, $444 million, which is the total cash consideration payable upon an exchange of all $629 million principal amount of notes outstanding, is now classified as a current debt obligation. The remaining carrying value of these notes is classified as a long-term debt obligation.
	Debt Issuances
	On February 24, 2015, Sprint Corporation issued $1.5 billion aggregate principal amount of 7.625% notes due 2025. Interest on the notes is payable semi-annually on February 15 and August 15. The notes are guaranteed by Sprint Communications, Inc.
	Debt Retirements
	On May 1, 2014, the Company retired the remaining $181 million aggregate principal amount upon maturity of its outstanding iPCS, Inc. Second Lien Secured Floating Rate Notes due 2014 plus accrued and unpaid interest.
	Credit Facilities
	Bank credit facility
	The Company has a $3.3 billion unsecured revolving bank credit facility that expires in February 2018. Borrowings under the revolving bank credit facility bear interest at a rate equal to the London Interbank Offered Rate (LIBOR) plus a spread that varies depending on the Company’s credit ratings. As of March 31, 2015, approximately $470 million in letters of credit were outstanding under this credit facility, including the letter of credit required by the Report and Order (see Note 12. Commitments and Contingencies). As a result of the outstanding letters of credit, which directly reduce the availability of borrowings, the Company had $2.8 billion of borrowing capacity available under the revolving bank credit facility as of March 31, 2015. In October 2014, we amended our revolving bank credit facility to, among other things, modify the required ratio (Leverage Ratio) of total indebtedness to trailing four quarters earnings before interest, taxes, depreciation and amortization and other non-recurring items, as defined by the credit facility (adjusted EBITDA), to provide that it may not exceed 6.5 to 1.0 through the quarter ending December 31, 2015, 6.25 to 1.0 through the quarter ending December 31, 2016 and 6.0 to 1.0 each fiscal quarter ending thereafter through expiration of the facility. The amended revolving bank credit facility allows us to reduce our total indebtedness for purposes of calculating the Leverage Ratio by subtracting from total indebtedness the amount of any cash contributed into a segregated reserve account, provided that, after such cash contribution, our cash remaining on hand for operations exceeds $2.0 billion. Upon transfer, the cash contribution will remain restricted until and to the extent it is no longer required for the Leverage Ratio to remain in compliance. The amendment also added Sprint Corporation as a guarantor of the revolving bank credit facility.
	EDC agreement
	The unsecured EDC agreement was amended in December 2014 to modify the Leverage Ratio to provide for terms similar to those of the revolving bank credit facility, as was amended in October 2014 mentioned above, as well as to add Sprint Corporation as guarantor. As part of the amendment to the EDC agreement, we increased our borrowing capacity by an additional $300 million due in 2019. As of March 31, 2015, the EDC agreement was fully drawn totaling $800 million. Under the terms of the EDC agreement, repayments of outstanding amounts cannot be re-drawn.
	Secured equipment credit facilities
	Eksportkreditnamnden (EKN)
	The EKN secured equipment credit facility was amended in December 2014 to modify the terms and conditions as it relates to the Leverage Ratio to provide for terms similar to those of the revolving bank credit facility as was amended in October 2014 mentioned above, as well as to add Sprint Corporation as a guarantor. As of March 31, 2015, both tranches of the EKN secured equipment credit facility totaling $1.0 billion were fully drawn. We made regularly scheduled principal repayments totaling $254 million during the year ended March 31, 2015 and the balance outstanding at March 31, 2015 was $508 million. Under the terms of the EKN secured equipment credit facility, repayments of outstanding amounts cannot be re-drawn.
	Finnvera plc (Finnvera)
	In December 2014, we and certain of our subsidiaries entered into a secured equipment credit facility insured by Finnvera, the Finnish export credit agency, with the ability to borrow up to $800 million, to finance network equipment-related purchases from Nokia Solutions and Networks US LLC, USA. The facility is divided into three consecutive tranches of varying size, with borrowings available through October 2017, contingent upon the amount of equipment-related purchases made by Sprint. Interest and fully-amortizing principal payments are due semi-annually, by tranche, beginning in March 2015 until June 2021. As of March 31, 2015, we had drawn $72 million on the facility. We made principal repayments totaling $28 million during the year ended March 31, 2015 and the balance outstanding at March 31, 2015 was $44 million.
	K-sure
	In December 2014, we and certain of our subsidiaries entered into a secured equipment credit facility insured by K-sure, the Korean export credit agency, with the ability to borrow up to $750 million, to finance network equipment-related purchases from Samsung Telecommunications America, LLC. The facility is divided into three consecutive tranches of varying size, and draws became available in January 2015 and will be available until May 2018 or until fully drawn, contingent upon the amount of equipment-related purchases by Sprint. Interest and fully-amortizing principal payments are due semi-annually by tranche beginning in June 2015 until December 2022. As of March 31, 2015, we had drawn $58 million on the facility.
	Delcredere | Ducroire (D/D)
	In December 2014, we and certain of our subsidiaries entered into a secured equipment credit facility insured by D/D, the Belgian export credit agency, with the ability to borrow up to $250 million, to finance network equipment-related purchases from Alcatel-Lucent USA Inc. The facility became available to draw in early 2015 and will be available until December 2016. Interest and fully-amortizing principal payments are due semi-annually beginning in June 2015 until December 2021. As of March 31, 2015, we had not made any draws on the facility.
	Borrowings under the EKN, Finnvera, K-sure and D/D secured equipment credit facilities are each secured by liens on the respective equipment purchased pursuant to each of the facilities. Each of these facilities is fully and unconditionally guaranteed by both Sprint Communications, Inc. and Sprint Corporation. The covenants under each of the four secured equipment credit facilities are similar to one another and to the covenants of our revolving bank credit facility and EDC agreement.
	Financing, Capital Lease and Other Obligations
	We have approximately 3,000 cell sites that we sold and subsequently leased back. Terms extend through 2021, with renewal options for an additional 20 years. These cell sites continue to be reported as part of our property, plant and equipment due to our continued involvement with the property sold and the transaction is accounted for as a financing. Our capital lease and other obligations are primarily for the use of wireless network equipment.
	Covenants
	Certain indentures and other agreements also require compliance with various covenants, including covenants that limit the ability of the Company and its subsidiaries to sell all or substantially all of its assets, limit the ability of the Company and its subsidiaries to incur indebtedness and liens, and require that we maintain certain financial ratios, each as defined by the terms of the indentures, supplemental indentures and financing arrangements.
	As of March 31, 2015, the Company was in compliance with all restrictive and financial covenants associated with its borrowings. A default under any of our borrowings could trigger defaults under certain of our other debt obligations, which in turn could result in the maturities being accelerated.
	Under our revolving bank credit facility and other finance agreements, we are currently restricted from paying cash dividends because our ratio of total indebtedness to adjusted EBITDA (each as defined in the applicable agreements) exceeds 2.5 to 1.0.
	Future Maturities of Long-Term Debt, Financing Obligation and Capital Lease Obligations
	Aggregate amount of maturities for long-term debt, financing obligation and capital lease obligations outstanding as of March 31, 2015, were as follows (in millions):
	Fiscal year 2015	$	1,300
	Fiscal year 2016	3,643
	Fiscal year 2017	1,379
Fiscal year 2018	3,068
Fiscal year 2019	3,094
Fiscal year 2020 and thereafter	20,241
	32,725
Net premiums	1,106
	$	33,831

Severance_and_Exit_Costs_Notes

Severance and Exit Costs (Notes)	12 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Severance and Exit Costs	Severance and Exit Costs
	For the year ended March 31, 2015, we recognized lease exit costs primarily associated with tower and cell sites as well as facility closures. For the Successor three-month transition period ended March 31, 2014, we recognized lease exit costs primarily associated with retail store closures. For the Successor year ended December 31, 2013 as well as for the Predecessor 191-day period ended July 10, 2013 and unaudited three-month period ended March 31, 2013, we recognized lease exit costs associated with the decommissioning of the Nextel Platform and access exit costs related to payments that will continue to be made under our backhaul access contracts for which we will no longer be receiving any economic benefit.
	As a result of the United States Cellular (U.S. Cellular) asset acquisition, which closed in May 2013, we recorded a liability related to network shut-down costs for which we agreed to reimburse U.S. Cellular. During the quarter ended December 31, 2014, we identified favorable trends in actual costs and, as a result, we released some of the reserve resulting in a gain of approximately $41 million included in "Other, net" on the consolidated statements of operations.
	For the Successor year ended March 31, 2015, three-month transition period ended March 31, 2014 and year ended December 31, 2013 as well as the Predecessor 191-day period ended July 10, 2013 and unaudited three-month period ended March 31, 2013, we also recognized severance costs associated with reductions in our work force.
	As a result of the modernization of our network and the completion of the Significant Transactions (see Note 3. Significant Transactions), we expect to incur additional exit costs in the future related to the transition of our existing backhaul architecture to a replacement technology for our network and the efforts associated with the integration of our Significant Transactions, such as the evaluation of future use of the Clearwire 4G broadband network, among other initiatives. These additional exit costs are expected to range between approximately $75 million to $150 million, of which the majority are expected to be incurred through March 31, 2016.
	The following provides the activity in the severance and exit costs liability included in "Accounts payable," "Accrued expenses and other current liabilities" and "Other liabilities" within the consolidated balance sheets:
		Successor
		March 31,				Net					Cash Payments				March 31,
		2014				Expense					and Other				2015
		(in millions)
	Lease exit costs	$	650			$	(28	)	(1)		$	(331	)		$	291
	Severance costs	197				253			(2)		(331		)		119
	Access exit costs	124				38			(3)		(118		)		44
		$	971			$	263				$	(780	)		$	454
	_________________
	-1	In addition to the $41 million gain (Wireless only) related to U.S. Cellular recognized, we recognized costs of $13 million ($12 million Wireless and $1 million Wireline) for the year ended March 31, 2015.
	-2	For the Successor year ended March 31, 2015, we recognized costs of $253 million ($218 million Wireless, $35 million Wireline).
	-3	For the Successor year ended March 31, 2015, we recognized costs of $38 million ($33 million Wireless, $5 million Wireline).
		Successor
		December 31,				Net					Cash Payments				March 31,
		2013				Expense					and Other				2014
		(in millions)
	Lease exit costs	$	764			$	11		(4)		$	(125	)		$	650
	Severance costs	225				14			(5)		(42		)		197
	Access exit costs	149				31			(6)		(56		)		124
		$	1,138			$	56				$	(223	)		$	971
	_________________
	-4	For the three-month transition period ended March 31, 2014, we recognized costs of $11 million (solely attributable to Wireless).
	-5	For the three-month transition period ended March 31, 2014, we recognized costs of $14 million ($12 million Wireless, $2 million Wireline).
	-6	For the three-month transition period ended March 31, 2014, $4 million (solely attributable to Wireline) was recognized as "Cost of services" and $27 million (solely attributable to Wireless) was recognized in "Severance and exit costs."
		Successor
		July 11,				Net					Cash Payments				December 31,
		2013				Expense					and Other				2013
		(in millions)
	Lease exit costs	$	933	(7)		$	56		(8)		$	(225	)		$	764
	Severance costs	54				219			(9)		(48		)		225
	Access exit costs	189				53			(10)		(93		)		149
		$	1,176			$	328				$	(366	)		$	1,138
	_________________
	-7	The July 11, 2013 opening balance takes into account purchase price adjustments as it relates to the SoftBank Merger.
	-8	For the year ended December 31, 2013, we recognized costs of $56 million ($54 million Wireless, $2 million Wireline).
	-9	For the year ended December 31, 2013, we recognized costs of $219 million ($191 million Wireless, $28 million Wireline).
	-10	For the year ended December 31, 2013, $19 million (solely attributable to Wireline) was recognized as "Cost of services" and $34 million (solely attributable to Wireless) was recognized in "Severance and exit costs."
		Predecessor
		December 31,			Purchase Price				Net					Cash Payments			July 10,
		2012			Adjustments				Expense					and Other			2013
		(in millions)
	Lease exit costs	$	190		$	131			$	478		(11)		$	(33	)	$	766
	Severance costs	11			—				58			(12)		(15		)	54
	Access exit costs	43			—				151			(13)		(5		)	189
		$	244		$	131			$	687				$	(53	)	$	1,009
	_________________
	-11	For the 191-day period ended July 10, 2013, we recognized net costs of $478 million (solely attributable to our Wireless segment). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $8 million (solely attributable to our Wireless segment).
	-12	For the 191-day period ended July 10, 2013, we recognized costs of $58 million ($55 million Wireless, and $3 million was Wireline). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $17 million ($14 million Wireless, and $3 million Wireline).
	-13	Of the $151 million ($133 million Wireless; $18 million Wireline) recognized for the 191-day period ended July 10, 2013, $35 million was recognized as "Cost of services" and $116 million was recognized in "Severance and exit costs." For the unaudited three-month period ended March 31, 2013, we recognized $7 million ($4 million Wireless; $3 million Wireline) all as "Cost of services."

Supplemental_Financial_Informa

Supplemental Financial Information (Notes)	12 Months Ended
	Mar. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Supplemental Financial Information	Supplemental Financial Information
		March 31,			March 31,
		2015			2014
		(in millions)
	Accounts and notes receivable, net
	Trade	$	1,037		$	3,271
	Unbilled trade and other	1,457			533
	Less allowances for doubtful accounts and deferred interest	(204		)	(197		)
		$	2,290		$	3,607
	Prepaid expenses and other current assets
	Prepaid expenses	$	401		$	451
	Due from Conduits for sold receivables	1,198			—
	Deferred charges and other	291			221
		$	1,890		$	672
	Other assets
	Unbilled trade installment receivables, net	361			317
	Investments	151			146
	Other	565			429
		$	1,077		$	892
	Accounts payable(1)
	Trade	$	3,786		$	2,492
	Accrued interconnection costs	198			316
	Capital expenditures and other	363			355
		$	4,347		$	3,163
	Accrued expenses and other current liabilities
	Deferred revenues	$	1,385		$	1,286
	Accrued taxes	238			306
	Payroll and related	589			290
	Severance, lease and other exit costs	223			555
	Accrued interest	525			515
	Accrued capital expenditures	705			1,247
	Other	1,628			1,345
		$	5,293		$	5,544
	Other liabilities
	Deferred rental income-communications towers	$	229		$	240
	Deferred rent	366			179
	Asset retirement obligations	584			651
	Unfavorable lease liabilities	856			1,068
	Post-retirement benefits and other non-current employee related liabilities	987			647
	Other	929			900
		$	3,951		$	3,685
	______________________
	-1	Includes liabilities in the amounts of $90 million and $91 million as of March 31, 2015 and 2014, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.

Income_Taxes_Notes

Income Taxes (Notes)	12 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	Sprint Corporation is the parent corporation of an affiliated group of corporations which join in the filing of a U.S. federal consolidated income tax return. Additionally, we file income tax returns in each state jurisdiction which imposes an income tax. We also file income tax returns in a number of foreign jurisdictions. However, our foreign income tax activity has been immaterial. Cash paid or received for income tax purposes was insignificant for all Successor and Predecessor periods presented.
	Income tax expense consists of the following:
		Successor																	Predecessor
		Year Ended			Three Months Ended						Year Ended				87 Days Ended December 31,				191 Days Ended July 10,			Three Months Ended			Year Ended
		March 31,			March 31,						December 31,											March 31,			December 31,
		2015			2014			2013 (Unaudited)			2013				2012				2013			2013 (Unaudited)			2012
					(in millions)
	Current income tax (expense) benefit
	Federal	$	5		$	—		$	(2	)	$	1			$	(3	)		$	2		$	(8	)	$	34
	State	(39		)	(10		)	—			(13		)		—				(17		)	(6		)	22
	Total current income tax (expense) benefit	(34		)	(10		)	(2		)	(12		)		(3		)		(15		)	(14		)	56
	Deferred income tax benefit
	(expense)
	Federal	491			(48		)	1			(46		)		(1		)		(1,402		)	(19		)	(199		)
	State	118			2			—			14				—				(184		)	(5		)	(10		)
	Total deferred income tax benefit (expense)	609			(46		)	1			(32		)		(1		)		(1,586		)	(24		)	(209		)
	Foreign income tax expense	(1		)	—						(1		)		—				—			—			(1		)
	Total income tax benefit (expense)	$	574		$	(56	)	$	(1	)	$	(45	)		$	(4	)		$	(1,601	)	$	(38	)	$	(154	)
	The differences that caused our effective income tax rates to vary from the 35% U.S. federal statutory rate for income taxes were as follows:
		Successor																	Predecessor
		Year Ended			Three Months Ended						Year Ended				87 Days Ended December 31,				191 Days Ended July 10,			Three Months Ended			Year Ended
		March 31,			March 31,						December 31,											March 31,			December 31,
		2015			2014			2013 (Unaudited)			2013				2012				2013			2013 (Unaudited)			2012
					(in millions)
	Income tax benefit (expense) at the federal statutory rate	$	1,372		$	33		$	3		$	635			$	8			$	(155	)	$	212		$	1,460
	Effect of:
	State income taxes, net of federal income tax effect	124			(4		)	—			47				—				(18		)	16			137
	State law changes, net of federal income tax effect	4			5			—			10				—				—			—			(5		)
	Reduction (increase) in liability for unrecognized tax benefits	1			—			—			2				—				(7		)	—			38
	Change in valuation allowance	(911		)	(82		)	—			(708		)		(4		)		(1,410		)	(265		)	(1,756		)
	Other, net	(16		)	(8		)	(4		)	(31		)		(8		)		(11		)	(1		)	(28		)
	Income tax benefit (expense)	$	574		$	(56	)	$	(1	)	$	(45	)		$	(4	)		$	(1,601	)	$	(38	)	$	(154	)
	Effective income tax rate	14.6		%	(58.9		)%	(12.5		)%	(2.5		)%		(17.4		)%		361.4		%	(6.3		)%	(3.7		)%
	Income tax (expense) benefit allocated to other items was as follows:
		Successor										Predecessor
		Year Ended			Three Months Ended			Year Ended				191 Days Ended July 10,				Three Months Ended			Year Ended
		March 31,			March 31,			December 31,								March 31,			December 31,
		2015			2014			2013				2013				2013 (Unaudited)			2012
					(in millions)
	Unrecognized net periodic pension and other postretirement benefit cost(1)	$	—		$	—		$	(58	)		$	(18	)		$	(10	)	$	—
	Unrealized holding gains/losses on securities(1)	$	—		$	(1	)	$	(3	)		$	—			$	(1	)	$	—
	_______________
	-1	These amounts have been recognized in accumulated other comprehensive loss.
	Deferred income taxes are recognized for the temporary differences between the carrying amounts of our assets and liabilities for financial statement purposes and their tax bases. Deferred tax assets are also recorded for operating loss, capital loss and tax credit carryforwards. The sources of the differences that give rise to the deferred income tax assets and liabilities as of March 31, 2015 and 2014, along with the income tax effect of each, were as follows:
		Successor
		March 31, 2015						March 31, 2014
		Current			Long-Term			Current			Long-Term
		(in millions)
	Deferred tax assets
	Net operating loss carryforwards	$	—		$	8,155		$	—		$	7,264
	Tax credit carryforwards	—			381			—			374
	Capital loss carryforwards	—			84			—			82
	Property, plant and equipment	—			261			—			500
	Debt obligations	—			419			—			598
	Deferred rent	—			470			—			474
	Pension and other postretirement benefits	—			385			—			252
	Accruals and other liabilities	637			561			738			601
		637			10,716			738			10,145
	Valuation allowance	(509		)	(8,371		)	(522		)	(7,175		)
		128			2,345			216			2,970
	Deferred tax liabilities
	FCC licenses	—			12,558			—			12,158
	Trademarks	—			1,725			—			2,461
Intangibles	—			1,658			—			2,248
Other	66			302			88			310
	66			16,243			88			17,177
Current deferred tax asset	$	62					$	128
Long-term deferred tax liability				$	13,898					$	14,207
The realization of deferred tax assets, including net operating loss carryforwards, is dependent on the generation of future taxable income sufficient to realize the tax deductions, carryforwards and credits. However, our history of annual losses reduces our ability to rely on expectations of future income in evaluating the ability to realize our deferred tax assets. Valuation allowances on deferred tax assets are recognized if it is determined that it is more likely than not that the asset will not be realized. As a result, the Company recognized income tax expense to increase the valuation allowance of $911 million, $82 million and $708 million for the Successor year ended March 31, 2015, three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $1.4 billion, $265 million, and $1.8 billion for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013, and year ended December 31, 2012, respectively, on deferred tax assets primarily related to losses incurred during the period that are not currently realizable and expenses recorded during the period that are not currently deductible for income tax purposes. The remaining increase of $272 million in the carrying amount of the valuation allowance for the Successor year ended March 31, 2015 is primarily related to amounts recorded to other comprehensive (loss) income related to the pension net actuarial loss and net impacts of acquisition accounting for the SoftBank Merger and Clearwire Acquisition. The remaining decrease in the carrying amount of the valuation allowance for the Successor year ended December 31, 2013 is primarily related to the net impact of acquisition accounting for the SoftBank Merger and Clearwire Acquisition. For the Predecessor year ended December 31, 2012 the remaining increase in the carrying amount of the valuation allowance is primarily associated with the tax effect of items reflected in other comprehensive loss and other accounts. We do not expect to record significant tax benefits on future net operating losses until our circumstances justify the recognition of such benefits.
We believe it is more likely than not that our remaining deferred income tax assets, net of the valuation allowance, will be realized based on current income tax laws and expectations of future taxable income stemming from the reversal of existing deferred tax liabilities. Uncertainties surrounding income tax law changes, shifts in operations between state taxing jurisdictions and future operating income levels may, however, affect the ultimate realization of all or some of these deferred income tax assets.
Income tax benefit of $574 million for the Successor year ended March 31, 2015 is primarily attributable to recognition of a tax benefit on the $1.9 billion Sprint trade name impairment loss partially offset by tax expense on taxable temporary differences from the amortization of FCC licenses during the period. Income tax expense of $56 million and $45 million for the Successor three-month transition period ended March 31, 2014, and year ended December 31, 2013, respectively, and $38 million and $154 million for the Predecessor unaudited three-month period ended March 31, 2013 and year ended December 31, 2012, respectively, is primarily attributable to taxable temporary differences from amortization of FCC licenses. Income tax expense of $1.6 billion for the Predecessor 191-day period ended July 10, 2013, is primarily attributable to taxable temporary differences from the $2.9 billion gain on the previously-held equity interests in Clearwire. The gain on the previously-held equity interests in Clearwire was principally attributable to the increase in the fair value of FCC licenses held by Clearwire. FCC licenses are amortized over 15 years for income tax purposes but, because these licenses have an indefinite life, they are not amortized for financial statement reporting purposes. These temporary differences result in net deferred income tax expense since they cannot be scheduled to reverse during the loss carryforward period. In addition, during the year ended December 31, 2012, a $69 million tax benefit was recorded as a result of the successful resolution of various state income tax uncertainties.
During the Successor year ended March 31, 2015, three-month transition period ended March 31, 2014 and year ended December 31, 2013, and Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013, and year ended December 31, 2012, we generated $398 million, $110 million, $263 million, $238 million, $96 million, and $319 million, respectively, of foreign income, which is included in (loss) income before income taxes on the consolidated statements of operations. We have no material unremitted earnings of foreign subsidiaries.
As of March 31, 2015, we had federal operating loss carryforwards of $19.9 billion, state operating loss carryforwards of $20.6 billion and foreign net operating loss carryforwards of $797 million. Related to these loss carryforwards, we have recorded federal tax benefits of $7.0 billion, net state tax benefits of $951 million and foreign tax benefits of $266 million before consideration of the valuation allowances. Approximately $1.4 billion of the federal net operating loss carryforwards expire between 2017 and 2021. The remaining $18.5 billion expire in varying amounts between 2022 and 2035. The state operating loss carryforwards expire in varying amounts through 2035. Foreign operating loss carryforwards of $426 million do not expire. The remaining foreign operating loss carryforwards expire in varying amounts starting in 2016.
In addition, we had available, for income tax purposes, federal alternative minimum tax net operating loss carryforwards of $20.9 billion and state alternative minimum tax net operating loss carryforwards of $4.9 billion. The loss carryforwards expire in varying amounts through 2035. We also had available capital loss carryforwards of $220 million. Related to these capital loss carryforwards are tax benefits of $84 million. The capital loss carryforwards expire between 2016 and 2019.
We also had available $451 million of federal and state income tax credit carryforwards as of March 31, 2015. Included in this amount are $3 million of income tax credits which expire prior to 2017 and $320 million which expire in varying amounts between 2017 and 2035. The remaining $128 million do not expire.
Unrecognized tax benefits are established for uncertain tax positions based upon estimates regarding potential future challenges to those positions at the largest amount that is greater than fifty percent likely of being realized upon ultimate settlement. These estimates are updated at each reporting date based on the facts, circumstances and information available. Interest related to these unrecognized tax benefits is recognized in interest expense. Penalties are recognized as additional income tax expense. The total unrecognized tax benefits attributable to uncertain tax positions were $163 million and $160 million, as of the March 31, 2015 and 2014, respectively. As of March 31, 2015, the total unrecognized tax benefits included items that would favorably affect the income tax provision by $152 million, if recognized without an offsetting valuation allowance adjustment. The accrued liability for income tax related interest and penalties was insignificant for all periods presented.
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
	Successor
	Year Ended			Three Months Ended
	March 31,			March 31,
	2015			2014
				(in  millions)
Balance at beginning of period	$	160		$	166
Additions based on current year tax positions	5			—
Additions based on prior year tax positions	3			1
Reductions for prior year tax positions	(3		)	(1		)
Reductions for settlements	(1		)	—
Reductions for lapse of statute of limitations	(1		)	(6		)
Balance at end of period	$	163		$	160
Settlement agreements were reached with the Appeals or Exam division of the Internal Revenue Service (IRS) for examination issues in dispute for years prior to 2010. The issues were immaterial to our consolidated financial statements. As of March 31, 2015, there are no federal income tax examinations being handled by the IRS Exam division nor are there any issues being handled by the IRS Appeals division.
We are involved in multiple state income tax examinations related to various years beginning with 1996, which are in various stages of the examination, administrative review or appellate process. Based on our current knowledge of the examinations, administrative reviews and appellate processes, we believe it is reasonably possible a number of our uncertain tax positions may be resolved during the next twelve months which could result in a reduction of up to $20 million in our unrecognized tax benefits.
The federal and state statutes of limitations for assessment of tax liability generally lapse three and four years, respectively, after the date the tax returns are filed. However, income tax attributes that are carried forward, such as net operating loss carryforwards, may be challenged and adjusted by taxing authorities at any time prior to the expiration of the statute of limitations for the tax year in which they are utilized.

Commitments_and_Contingencies_

Commitments and Contingencies (Notes)	12 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Litigation, Claims and Assessments
	In March 2009, a stockholder brought suit, Bennett v. Sprint Nextel Corp., in the U.S. District Court for the District of Kansas, alleging that Sprint Communications and three of its former officers violated Section 10(b) of the Exchange Act and Rule 10b-5 by failing adequately to disclose certain alleged operational difficulties subsequent to the Sprint-Nextel merger, and by purportedly issuing false and misleading statements regarding the write-down of goodwill. The plaintiff sought class action status for purchasers of Sprint Communications common stock from October 26, 2006 to February 27, 2008. On January 6, 2011, the Court denied the motion to dismiss. Subsequently, our motion to certify the January 6, 2011 order for an interlocutory appeal was denied. On March 27, 2014, the court certified a class including bondholders as well as stockholders. On April 11, 2014, we filed a petition to appeal that certification order to the Tenth Circuit Court of Appeals. The petition was denied on May 23, 2014. After mediation, the parties have reached an agreement in principle to settle the matter, and the settlement amount is expected to be substantially paid by the Company's insurers. The district court granted preliminary approval of the proposed settlement on April 10, 2015 and a final approval hearing has been scheduled for August 5, 2015. We do not expect the resolution of this matter to have a material adverse effect on our financial position or results of operations.
	In addition, five related stockholder derivative suits were filed against Sprint Communications and certain of its present and/or former officers and directors. The first, Murphy v. Forsee, was filed in state court in Kansas on April 8, 2009, was removed to federal court, and was stayed by the court pending resolution of the motion to dismiss the Bennett case; the second, Randolph v. Forsee, was filed on July 15, 2010 in state court in Kansas, was removed to federal court, and was remanded back to state court; the third, Ross-Williams v. Bennett, et al., was filed in state court in Kansas on February 1, 2011; the fourth, Price v. Forsee, et al., was filed in state court in Kansas on April 15, 2011; and the fifth, Hartleib v. Forsee, et. al., was filed in federal court in Kansas on July 14, 2011. These cases are essentially stayed while the Bennett case is being resolved. We do not expect the resolution of these matters to have a material adverse effect on our financial position or results of operations.
	On April 19, 2012, the New York Attorney General filed a complaint alleging that Sprint Communications has fraudulently failed to collect and pay more than $100 million in New York sales taxes on receipts from its sale of wireless telephone services since July 2005. The complaint seeks recovery of triple damages as well as penalties and interest. Sprint Communications moved to dismiss the complaint on June 14, 2012. On July 1, 2013, the court entered an order denying the motion to dismiss in large part, although it did dismiss certain counts or parts of certain counts. Sprint Communications has appealed that order and the intermediate appellate court affirmed the order of the trial court. Our petition for leave to bring an interlocutory appeal to the highest court in New York was granted and briefing of that appeal was completed in January 2015. We believe the complaint is without merit and intend to continue to defend this matter vigorously. We do not expect the resolution of this matter to have a material adverse effect on our financial position or results of operations.
	Eight related stockholder derivative suits have been filed against Sprint Communications and certain of its current and former officers and directors. Each suit alleges generally that the individual defendants breached their fiduciary duties to Sprint Communications and its stockholders by allegedly permitting, and failing to disclose, the actions alleged in the suit filed by the New York Attorney General. One suit, filed by the Louisiana Municipal Police Employees Retirement System, was dismissed by a federal court. Two suits were filed in state court in Johnson County, Kansas and one of those suits was dismissed as premature; and five suits are pending in federal court in Kansas. The remaining Kansas suits have been stayed. We do not expect the resolution of these matters to have a material adverse effect on our financial position or results of operations.
	Sprint Communications, Inc. is also a defendant in a complaint filed by stockholders of Clearwire Corporation asserting claims for breach of fiduciary duty by Sprint Communications, and related claims and otherwise challenging the Clearwire Acquisition. ACP Master, LTD, et al. v. Sprint Nextel Corp., et al., was filed April 26, 2013, in Chancery Court in Delaware. Our motion to dismiss the suit was denied, and discover has begun. Plaintiffs in the ACP Master, LTD suit have also filed suit requesting an appraisal of the fair value of their Clearwire stock, and discovery is proceeding in that case. Sprint Communications intends to defend the ACP Master, LTD case vigorously. We do not expect the resolution of these matters to have a material adverse effect on our financial position or results of operations.
	Sprint is currently involved in numerous court actions alleging that Sprint is infringing various patents. Most of these cases effectively seek only monetary damages. A small number of these cases are brought by companies that sell products and seek injunctive relief as well. These cases have progressed to various degrees and a small number may go to trial if they are not otherwise resolved. Adverse resolution of these cases could require us to pay significant damages, cease certain activities, or cease selling the relevant products and services. In many circumstances, we would be indemnified for monetary losses that we incur with respect to the actions of our suppliers or service providers. We do not expect the resolution of these cases to have a material adverse effect on our financial position or results of operations.
	In October 2013, the FCC Enforcement Bureau began to issue notices of apparent liability (NALs) to other Lifeline providers, imposing fines for intracarrier duplicate accounts identified by the government during its audit function. Those audits also identified a small percentage of potentially duplicative intracarrier accounts related to our Assurance Wireless business. No NAL has yet been issued with respect to Sprint and we do not know if one will be issued. Further, we are not able to reasonably estimate the amount of any claim for penalties that might be asserted. However, based on the information currently available, if a claim is asserted by the FCC, Sprint does not believe that any amount ultimately paid would be material to the Company’s results of operations or financial position.
	Beginning in early 2012, a group of state attorneys general began an investigation into the practice of wireless carriers including on their bills charges for certain content from third-party providers, particularly premium short message services, and the measures taken by carriers to ensure that such charges were appropriately authorized. Late in 2013, the Consumer Financial Protection Bureau (CFPB) also began a separate investigation into the issue, and the FCC began its own investigation in mid-2014. In July 2014, the Federal Trade Commission (FTC) brought suit against T-Mobile, alleging that it included unauthorized charges on its bills; in December 2014, T-Mobile entered into a settlement agreement with the FTC, FCC and state attorneys general. In October 2014, the FTC, FCC and states announced a settlement with AT&T regarding third-party billing issues. In December, 2014, the CFPB brought suit against Sprint regarding third-party billing issues. On May 6, 2015, we entered into agreements with the FCC, CFPB, and various states to settle all issues involved in the investigation for an amount not material to the Company's results of operations or financial position.
	Various other suits, inquiries, proceedings and claims, either asserted or unasserted, including purported class actions typical for a large business enterprise and intellectual property matters, are possible or pending against us or our subsidiaries. If our interpretation of certain laws or regulations, including those related to various federal or state matters such as sales, use or property taxes, or other charges were found to be mistaken, it could result in payments by us. While it is not possible to determine the ultimate disposition of each of these proceedings and whether they will be resolved consistent with our beliefs, we expect that the outcome of such proceedings, individually or in the aggregate, will not have a material adverse effect on our financial position or results of operations.
	Spectrum Reconfiguration Obligations
	In 2004, the FCC adopted a Report and Order that included new rules regarding interference in the 800 MHz band and a comprehensive plan to reconfigure the 800 MHz band. The Report and Order provides for the exchange of a portion of our 800 MHz FCC spectrum licenses, and requires us to fund the cost incurred by public safety systems and other incumbent licensees to reconfigure the 800 MHz spectrum band. Also, in exchange, we received licenses for 10 MHz of nationwide spectrum in the 1.9 GHz band.
	The minimum cash obligation under the Report and Order is $2.8 billion. We are, however, obligated to pay the full amount of the costs relating to the reconfiguration plan, even if those costs exceed $2.8 billion. As required under the terms of the Report and Order, a letter of credit has been secured to provide assurance that funds will be available to pay the relocation costs of the incumbent users of the 800 MHz spectrum. The letter of credit was initially $2.5 billion, but has been reduced during the course of the proceeding to $406 million as of March 31, 2015. Since the inception of the program, we have incurred payments of approximately $3.4 billion directly attributable to our performance under the Report and Order, including approximately $157 million during the year ended March 31, 2015. When incurred, substantially all costs are accounted for as additions to FCC licenses with the remainder as property, plant and equipment. Although costs incurred through March 31, 2015 have exceeded $2.8 billion, not all of those costs have been reviewed and accepted as eligible by the transition administrator. During the year ended March 31, 2015, we received a cash payment of approximately $95 million which represented a reimbursement of prior reconfiguration costs incurred by us that also benefited spectrum recently auctioned by the FCC. We do not expect any further reimbursements.
	Completion of the 800 MHz band reconfiguration was initially required by June 26, 2008 and public safety reconfiguration is nearly complete across the country with the exception of Washington State and the four states that share a common border with Mexico. The FCC continues to grant the remaining 800 MHz public safety licensees additional time to complete their band reconfigurations which, in turn, delays our access to our 800 MHz replacement channels in these areas. In the areas where band reconfiguration is complete, Sprint has received its replacement spectrum in the 800 MHz band and Sprint is deploying 3G CDMA and 4G LTE on this spectrum in combination with its spectrum in the 1.9 GHz and 2.5 GHz bands.
	Future Minimum Commitments
	As of March 31, 2015, the minimum estimated amounts due under operating leases, spectrum leases and service credits, and purchase orders and other commitments were as follows:
	Future Minimum Commitments	Total		Fiscal Year 2015		Fiscal Year 2016		Fiscal Year 2017		Fiscal Year 2018		Fiscal Year 2019		Fiscal Year
														2020 and thereafter
		(in millions)
	Operating leases	$	15,381	$	2,122	$	2,078	$	2,015	$	1,964	$	1,857	$	5,345
	Spectrum leases and service credits	6,725		194		204		212		214		218		5,683
	Purchase orders and other commitments	15,004		8,861		2,614		1,147		914		460		1,008
	Total	$	37,110	$	11,177	$	4,896	$	3,374	$	3,092	$	2,535	$	12,036
	Operating Leases
	We lease various equipment, office facilities, retail outlets and kiosks, switching facilities and cell sites under operating leases. The non-cancelable portion of these leases generally ranges from monthly up to 15 years. These leases, with few exceptions, provide for automatic renewal options and escalations that are either fixed or based on the consumer price index. Any rent abatements, along with rent escalations, are included in the computation of rent expense calculated on a straight-line basis over the lease term. Our lease term for most leases includes the initial non-cancelable term plus at least one renewal period, if the non-cancelable term is less than ten years, as the exercise of the related renewal option or options is reasonably assured. Our cell site leases generally provide for an initial non-cancelable term of five to twelve years with up to 5 renewal options for five years each.
	During 2011 and 2012, we renegotiated cell site leases in connection with the modernization of our network and the shutdown of the Nextel platform. Our rental commitments for operating leases, including lease renewals that are reasonably assured, consisted mainly of leases for cell and switch sites, real estate, information technology and network equipment and office space. Total rental expense was $2.6 billion, $653 million and $1.3 billion for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $1.0 billion, $483 million and $2.0 billion for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013 and year ended December 31, 2012, respectively.
	Spectrum Leases and Service Credits
	Certain of the spectrum leases provide for minimum lease payments, additional charges, renewal options and escalation clauses. Leased spectrum agreements generally have terms of up to 30 years. We expect that all renewal periods in our spectrum leases will be renewed by us.
	We also have commitments to provide services to certain lessors, and to reimburse lessors for certain capital equipment and third-party service expenditures over the term of the lease. We accrue a monthly obligation for the services and equipment based on the total estimated available service credits divided by the term of the lease. The obligation is reduced by services provided and as actual invoices are presented and paid to the lessors. During the period ended March 31, 2015, we satisfied $9 million related to these commitments. The maximum remaining commitment at March 31, 2015 was $90 million and is expected to be incurred over the term of the related lease agreements, which generally range from 15 to 30 years.
	Purchase Orders and Other Commitments
	We are a party to other commitments, which includes, among other things, service, spectrum, network equipment, devices, asset retirement obligations and other executory contracts in connection with conducting our business. Amounts actually paid under some of these agreements will likely be higher due to variable components of these agreements. The more significant variable components that determine the ultimate obligation owed include such items as hours contracted, subscribers and other factors. In addition, we are a party to various arrangements that are conditional in nature and obligate us to make payments only upon the occurrence of certain events, such as the delivery of functioning software or a product. Because it is not possible to predict the timing or amounts that may be due under these conditional arrangements, no such amounts have been included in the table above.

Stockholders_Equity_and_Per_Sh

Stockholders' Equity and Per Share Data (Notes)	12 Months Ended
	Mar. 31, 2015
Shareholders' Equity and Per Share Data [Abstract]
Stockholders' Equity and Per Share Data	Stockholders' Equity and Per Share Data
	Our certificate of incorporation authorizes 10,020,000,000 shares of capital stock as follows:
	•	9,000,000,000 shares of common stock, par value $0.01 per share;
	•	1,000,000,000 shares of non-voting common stock, par value $0.01 per share; and
	•	20,000,000 shares of preferred stock, par value $0.0001 per share.
	Classes of Common Stock
	Voting Common Stock
	The holders of our common stock are entitled to one vote per share on all matters submitted for action by the stockholders. There were approximately 4.0 billion shares of common stock outstanding as of March 31, 2015.
	Treasury Shares
	Shares of common stock repurchased by us are recorded at cost as treasury shares and result in a reduction of stockholders' equity. We reissue treasury shares as part of our stockholder approved stock-based compensation programs, as well as upon conversion of outstanding securities that are convertible into common stock. When shares are reissued, we determine the cost using the FIFO method.
	Dividends
	We did not declare any dividends on our common shares for all periods presented in the consolidated financial statements. We are currently restricted from paying cash dividends by the terms of our revolving bank credit facility, EDC Agreement and all other equipment credit facilities (See Note 8. Long-Term Debt, Financing and Capital Lease Obligations).
	Accumulated Other Comprehensive Loss
	The components of accumulated other comprehensive loss, net of tax are as follows:
		March 31, 2015			March 31, 2014
		(in millions)
	Unrecognized net periodic pension and postretirement benefit cost	$	(388	)	$	(54	)
	Unrealized net gains related to investments	1			7
	Foreign currency translation adjustments	(21		)	4
	Accumulated other comprehensive loss	$	(408	)	$	(43	)
	Per Share Data
	Basic net loss per common share is calculated by dividing net loss by the weighted average number of common shares outstanding during the period. Diluted net loss per common share adjusts basic net loss per common share, computed using the treasury stock method, for the effects of potentially dilutive common shares, if the effect is not antidilutive. Outstanding options and restricted stock units (exclusive of participating securities) that had no effect on our computation of dilutive weighted average number of shares outstanding as their effect would have been antidilutive were approximately 56 million, 60 million and 70 million as of the Successor periods ended March 31, 2015, March 31, 2014, and December 31, 2013, respectively, and 61 million, 74 million and 78 million shares for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013 and year ended December 31, 2012, respectively. In addition, as of all periods subsequent to the SoftBank Merger, all 55 million shares issuable under the warrant which was issued to SoftBank at the close of the SoftBank Merger were treated as potentially dilutive securities but did not impact our computation of dilutive weighted average number of shares outstanding as their effect would have been antidilutive. The warrant is exercisable at $5.25 per share at the option of Softbank, in whole or in part, at any time within the five-year term.

Segments_Notes

Segments (Notes)	12 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segments	Segments
	Sprint operates two reportable segments: Wireless and Wireline.
	•	Wireless primarily includes retail, wholesale, and affiliate revenue from a wide array of wireless voice and data transmission services and equipment revenue from the sale of wireless devices and accessories in the U.S., Puerto Rico and the U.S. Virgin Islands.
	•	Wireline primarily includes revenue from domestic and international wireline voice and data communication services, including services to the cable multiple systems operators that resell our local and long distance services and use our back office systems and network assets in support of their telephone services provided over cable facilities primarily to residential end-use subscribers.
	We define segment earnings as wireless or wireline operating (loss) income before other segment expenses such as depreciation, amortization, severance, exit costs, goodwill impairments, asset impairments, and other items, if any, solely and directly attributable to the segment representing items of a non-recurring or unusual nature. Expense and income items excluded from segment earnings are managed at the corporate level. Transactions between segments are generally accounted for based on market rates, which we believe approximate fair value. The Company generally re-establishes these rates at the beginning of each calendar year. Over the past several years, there has been an industry-wide trend of lower rates due to increased competition from other wireline and wireless communications companies as well as cable and Internet service providers.
	Segment financial information is as follows:
	Successor
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Year Ended March 31, 2015
	Net operating revenues	$	32,327		$	2,191		$	14		$	34,532
	Inter-segment revenues(1)	—			623			(623		)	—
	Total segment operating expenses	(26,433		)	(2,701		)	602			(28,532		)
	Segment earnings	$	5,894		$	113		$	(7	)	6,000
	Less:
	Depreciation										(3,797		)
	Amortization										(1,552		)
	Impairments(2)										(2,133		)
	Other, net(3)										(413		)
	Operating loss										(1,895		)
	Interest expense										(2,051		)
	Other income, net										27
	Loss before income taxes										$	(3,919	)
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Three Months Ended March 31, 2014
	Net operating revenues	$	8,254		$	617		$	4		$	8,875
	Inter-segment revenues(1)	—			153			(153		)	—
	Total segment operating expenses	(6,417		)	(758		)	144			(7,031		)
	Segment earnings	$	1,837		$	12		$	(5	)	1,844
	Less:
	Depreciation										(868		)
	Amortization										(429		)
	Impairments(2)										(75		)
	Other, net(3)										(52		)
	Operating income										420
	Interest expense										(516		)
	Other income, net										1
	Loss before income taxes										$	(95	)
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Three Months Ended March 31, 2013 (unaudited)
	Net operating revenues	$	—		$	—		$	—		$	—
	Inter-segment revenues(1)	—			—			—			—
	Total segment operating expenses	—			—			(14		)	(14		)
	Segment earnings	$	—		$	—		$	(14	)	(14		)
	Other income, net										6
	Loss before income taxes										$	(8	)
	Successor
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Year Ended December 31, 2013
	Net operating revenues	$	15,642		$	1,240		$	9		$	16,891
	Inter-segment revenues(1)	—			396			(396		)	—
	Total segment operating expenses	(13,464		)	(1,414		)	353			(14,525		)
	Segment earnings	$	2,178		$	222		$	(34	)	2,366
Less:
Depreciation										(2,026		)
Amortization										(908		)
Other, net(3)										(402		)
Operating loss										(970		)
Interest expense										(918		)
Other income, net										73
Loss before income taxes										$	(1,815	)
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
87 days Ended December 31, 2012
Net operating revenues	$	—		$	—		$	—		$	—
Inter-segment revenues(1)	—			—			—			—
Total segment operating expenses	—			—			(33		)	(33		)
Segment earnings	$	—		$	—		$	(33	)	(33		)
Other income, net										10
Loss before income taxes										$	(23	)
Other Information	Wireless			Wireline			Corporate and			Consolidated
							Other
	(in millions)
As of and for the year ended March 31, 2015
Capital expenditures	$	5,442		$	275		$	287		$	6,004
Total assets	$	75,581		$	1,261		$	6,188		$	83,030
As of and for the three months ended March 31, 2014
Capital expenditures	$	1,343		$	79		$	66		$	1,488
Total assets	$	75,051		$	1,499		$	8,139		$	84,689
As of March 31, 2013
Total assets	$	—		$	—		$	3,122		$	3,122
As of and for the year ended December 31, 2013
Capital expenditures	$	3,535		$	153		$	159		$	3,847
Total assets	$	75,128		$	1,548		$	9,419		$	86,095
As of December 31, 2012
Total assets	$	—		$	—		$	3,115		$	3,115
Predecessor
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
191 Days Ended July 10, 2013
Net operating revenues	$	17,125		$	1,471		$	6		$	18,602
Inter-segment revenues(1)	—			430			(430		)	—
Total segment operating expenses	(14,355		)	(1,629		)	425			(15,559		)
Segment earnings	$	2,770		$	272		$	1		3,043
Less:
Depreciation										(3,098		)
Amortization										(147		)
Other, net(3)										(683		)
Operating loss										(885		)
Interest expense										(1,135		)
Equity in losses of unconsolidated investments, net							$	(482	)
Gain on previously-held equity interests							2,926			2,444
Other income, net										19
Income before income taxes										$	443
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
Three Months Ended March 31, 2013 (unaudited)
Net operating revenues	$	8,089		$	702		$	2		$	8,793
Inter-segment revenues(1)	—			191			(191		)	—
Total segment operating expenses	(6,694		)	(765		)	190			(7,269		)
Segment earnings	$	1,395		$	128		$	1		1,524
Less:
Depreciation										(1,422		)
Amortization										(70		)
Other, net(3)										(3		)
Operating income										29
Interest expense										(432		)
Equity in losses of unconsolidated investments, net							$	(202	)	(202		)
Loss before income taxes										$	(605	)
Predecessor
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
Year Ended December 31, 2012
Net operating revenues	$	32,355		$	2,999		$	12		$	35,366
Inter-segment revenues(1)	—			882			(882		)	—
Total segment operating expenses	(28,208		)	(3,232		)	877			(30,563		)
Segment earnings	$	4,147		$	649		$	7		4,803
Less:
Depreciation										(6,240		)
Amortization										(303		)
Business combination and hurricane-related charges(4)										(64		)
Impairments(2)										(102		)
Other, net(3)										86
Operating loss										(1,820		)
Interest expense										(1,428		)
Equity in losses of unconsolidated investments, net							$	(1,114	)	(1,114		)
Other income, net										190
Loss before income taxes										$	(4,172	)
Other Information	Wireless			Wireline			Corporate and			Consolidated
							Other
	(in millions)
Capital expenditures for the 191 days ended July 10, 2013	$	2,840		$	174		$	126		$	3,140
Capital expenditures for the three months ended March 31, 2013 (unaudited)	$	1,270		$	64		$	47		$	1,381
As of and for the year ended December 31, 2012
Capital expenditures	$	3,753		$	240		$	268		$	4,261
Total assets	$	38,297		$	2,195		$	11,078		$	51,570
_________________
-1	Inter-segment revenues consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.
-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.
-3	Other, net for the Successor year ended March 31, 2015 consists of $304 million of severance and exit costs, combined with $91 million for legal reserves related to various pending legal suits and proceedings and $59 million for a partial pension settlement, partially offset by a $41 million release of liability reserves associated with the May 2013 U.S. Cellular asset acquisition. Other, net for the Successor three-month transition period ended March 31, 2014 consists of $52 million of severance and exit costs. 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 and unaudited three-month period ended March 31, 2013 consists of $652 million and $25 million, respectively, of severance and exit costs, partially offset by $22 million of favorable developments in connection with an E911 regulatory tax-related contingency. Other, net for the Predecessor 191-day period ended July 10, 2013 also includes $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). Other, net for the Predecessor year ended December 31, 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 $196 million of lease exit costs.
-4	Includes $45 million of hurricane-related charges for the Predecessor year ended December 31, 2012, which are classified in our consolidated statements of operations as follows: $21 million as contra-revenue in net operating revenues of Wireless, $20 million as cost of services ($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.
Successor
Operating Revenues by Service and Products	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations(1)
	(in millions)
Year Ended March 31, 2015
Wireless services	$	26,544		$	—		$	—		$	26,544
Wireless equipment	4,990			—			—			4,990
Voice	—			1,174			(365		)	809
Data	—			213			(88		)	125
Internet	—			1,353			(165		)	1,188
Other	793			74			9			876
Total net operating revenues	$	32,327		$	2,814		$	(609	)	$	34,532
	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations(1)
	(in millions)
Three Months Ended March 31, 2014
Wireless services	$	7,096		$	—		$	—		$	7,096
Wireless equipment	999			—			—			999
Voice	—			352			(88		)	264
Data	—			62			(26		)	36
Internet	—			345			(37		)	308
Other	159			11			2			172
Total net operating revenues	$	8,254		$	770		$	(149	)	$	8,875
	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations(1)
	(in millions)
Year Ended December 31, 2013
Wireless services	$	13,579		$	—		$	—		$	13,579
Wireless equipment	1,797			—			—			1,797
Voice	—			719			(240		)	479
Data	—			138			(69		)	69
Internet	—			747			(81		)	666
Other	266			32			3			301
Total net operating revenues	$	15,642		$	1,636		$	(387	)	$	16,891
Predecessor
Operating Revenues by Service and Products	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations(1)
	(in millions)
191 Days Ended July 10, 2013
Wireless services	$	15,139		$	—		$	—		$	15,139
Wireless equipment	1,707			—			—			1,707
Voice	—			771			(236		)	535
Data	—			188			(93		)	95
Internet	—			913			(100		)	813
Other	279			29			5			313
Total net operating revenues	$	17,125		$	1,901		$	(424	)	$	18,602
	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations(1)
	(in millions)
Three Months Ended March 31, 2013 (unaudited)
Wireless services	$	7,143		$	—		$	—		$	7,143
Wireless equipment	813			—			—			813
Voice	—			352			(99		)	253
Data	—			94			(46		)	48
Internet	—			434			(47		)	387
Other	133			13			3			149
Total net operating revenues	$	8,089		$	893		$	(189	)	$	8,793
	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations(1)
	(in millions)
Year Ended December 31, 2012
Wireless services(2)	$	28,624		$	—		$	—		$	28,624
Wireless equipment	3,248			—			—			3,248
Voice	—			1,627			(515		)	1,112
Data	—			398			(176		)	222
Internet	—			1,781			(190		)	1,591
Other	483			75			11			569
Total net operating revenues	$	32,355		$	3,881		$	(870	)	$	35,366
_______________
-1	Revenues eliminated in consolidation consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.
-2	Wireless services related to the Wireless segment for the Predecessor year ended December 31, 2012 excludes $21 million of hurricane-related contra-revenue charges reflected in net operating revenues in our consolidated statements of operations.

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited) (Notes)	12 Months Ended
	Mar. 31, 2015
Selected Quarterly Financial Information [Abstract]
Quarterly Financial Data	Quarterly Financial Data (Unaudited)
		Successor
		Quarter
		1st			2nd			3rd			4th
		(in millions, except per share amounts)
	Fiscal year 2014
	Net operating revenues	$	8,789		$	8,488		$	8,973		$	8,292
	Operating income (loss)	$	519		$	(192	)	$	(2,540	)	$	318
	Net income (loss)	$	23		$	(765	)	$	(2,379	)	$	(224	)
	Basic and diluted income (loss) per common share(1)	$	0.01		$	(0.19	)	$	(0.60	)	$	(0.06	)
	Calendar year 2013
	Net operating revenues	$	—		$	—		$	7,749		$	9,142
	Operating loss	$	(14	)	$	(22	)	$	(358	)	$	(576	)
	Net loss	$	(9	)	$	(114	)	$	(699	)	$	(1,038	)
	Basic and diluted loss per common share(1)	$	—		$	—		$	(0.18	)	$	(0.26	)
		Predecessor
		Quarter
		1st			2nd			10-Jul-13
		(in millions, except per share amounts)
	Calendar year 2013
	Net operating revenues	$	8,793		$	8,877		$	932
	Operating income (loss)	$	29		$	(874	)	$	(40	)
	Net (loss) income	$	(643	)	$	(1,597	)	$	1,082
	Basic (loss) income per common share(1)	$	(0.21	)	$	(0.53	)	$	0.35
	Diluted (loss) income per common share(1)	$	(0.21	)	$	(0.53	)	$	0.3
	_____________
	-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.

Related_Party_Transactions_Not

Related Party Transactions (Notes)	12 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	Related-Party Transactions
	Clearwire Related-Party Transactions
	Sprint's relationship with Clearwire, which is now a wholly-owned subsidiary of Sprint, includes agreements by which we resell wireless data services utilizing Clearwire's 4G network. In addition, Clearwire subscribers utilize the third generation (3G) Sprint network which provides dual-mode service to subscribers in those areas where access to Clearwire's 4G network is not available.
	Immediately prior to the Clearwire Acquisition, Sprint Communications held approximately 50.1% of non-controlling voting interest and a 6.0% non-controlling economic interest in Clearwire Corporation as well as a 44.1% non-controlling economic interest in Clearwire Communications LLC for which the carrying value totaled $325 million. Prior to the close of the Clearwire Acquisition, we applied equity method accounting to the investment in Clearwire.
	Equity in losses from Clearwire were $482 million, $202 million, and $1.1 billion for the Predecessor 190-day period ended July 9, 2013, Predecessor unaudited three-month period ended March 31, 2013 and the Predecessor year ended December 31, 2012, respectively. The equity in losses from our investment in Clearwire consisted of our share of Clearwire's net loss and other adjustments, if any, such as non-cash impairment of our investment, gains or losses associated with the dilution of our ownership interest resulting from Clearwire's equity issuances, derivative losses associated with the change in fair value of the embedded derivative included in exchangeable notes between Clearwire and Sprint, and other items recognized by Clearwire Corporation that did not affect our economic interest. Sprint's equity in losses for the Predecessor 190-day period ended July 9, 2013, include a $65 million derivative loss associated with the change in fair value of the embedded derivative. Equity in losses from Clearwire for the Predecessor year ended December 31, 2012 included a $204 million pre-tax impairment reflecting a reduction in the carrying value of the investment in Clearwire to an estimated fair value as well as a $41 million charge associated with Clearwire's write-off of certain network and other assets that no longer met its strategic plans.
	Subsequent to the Clearwire Acquisition, Clearwire is consolidated as a wholly-owned subsidiary of Sprint. In connection with the acquisition, Sprint recorded a pre-tax gain of approximately $2.9 billion to "Gain on previously-held equity interests" in its Predecessor consolidated statements of operations immediately preceding the Clearwire Acquisition resulting from the difference between the estimated fair value of the interests owned prior to the acquisition ($5.00 per share offer price less an estimated control premium of approximately $0.60) and the carrying value of approximately $325 million for those previously-held equity interests.
	Cost of services included in our consolidated statements of operations related to our agreement to purchase 4G services from Clearwire totaled $207 million, $101 million and $417 million for the Predecessor 190-day period ended July 9, 2013, Predecessor unaudited three-month period ended March 31, 2013 and the Predecessor year ended December 31, 2012, respectively.
	Summarized financial information for Clearwire for the 190-day period ended July 9, 2013, which preceded the Clearwire Acquisition, is as follows:
		190 Days Ended July 9,			Year Ended December 31,
		2013			2012
		(in millions)
	Revenues	$	666		$	1,265
	Operating expenses	(1,285		)	(2,644		)
	Operating loss	$	(619	)	$	(1,379	)
	Net loss from continuing operations before non-controlling interests	$	(1,102	)	$	(1,744	)
	Net loss from discontinued operations before non-controlling interests	$	—		$	(168	)
	SoftBank Related-Party Transactions
	In addition to agreements arising out of or relating to the SoftBank Merger, Sprint has entered into various other arrangements with SoftBank or its controlled affiliates (SoftBank Parties) or with third parties to which SoftBank Parties are also parties, including for international wireless roaming, wireless and wireline call termination, real estate, device and accessory purchasing, distribution and other services.
	Specifically, we have arrangements with Brightstar US, Inc. (Brightstar), a wholly-owned subsidiary of SoftBank, whereby Brightstar provides supply chain and inventory management services to us in our indirect channels and whereby Sprint may sell new and used devices and new accessories to Brightstar for its own purposes. The supply chain and inventory management arrangement contemplates that Brightstar will purchase inventory from the OEMs to sell directly to our indirect dealers. As compensation for these services, we remit per unit fees to Brightstar for each device sold to dealers or retailers in our indirect channels. During the year ended March 31, 2015, we incurred fees under this arrangement totaling $66 million. Until Brightstar successfully negotiates contracts with, and procures credit from, our existing OEMs, Brightstar will purchase device inventory from us in order to fulfill orders within our indirect channel. During the year ended March 31, 2015, Brightstar primarily fulfilled indirect channel orders with inventory acquired from us. In October 2014, we provided a $1.0 billion credit line to Brightstar to facilitate certain of these arrangements. As a result, we shifted our concentration of credit risk away from our indirect channel partners to Brightstar. As Brightstar is a wholly-owned subsidiary of SoftBank, we expect SoftBank will provide the necessary support to ensure that Brightstar will fulfill its obligations to us under these agreements. However, we have no assurance that SoftBank will provide such support.
	Amounts included in our consolidated financial statements associated with our arrangements with Brightstar were as follows:
	Consolidated balance sheets:	March 31,			March 31,
		2015			2014
		(in millions)
	Accounts receivable	$	430		$	—
	Accounts payable	$	96		$	—
	Consolidated statements of operations:	March 31,
		2015
		(in millions)
	Net operating revenues (1)	$	1,818
	Cost of products (1)	$	1,887
	_________________
	-1	Amounts for all other reported periods were immaterial.
	Additionally, we have arrangements with a wholly-owned subsidiary of Brightstar (Brightstar Subsidiary) to procure devices and accessories on our behalf with certain third-party vendors under existing purchase arrangements Sprint has with those vendors as well as new vendor purchase arrangements entered into by the Brightstar Subsidiary. The procurement services include placing orders, processing invoices, receiving payments from us, making payments to our suppliers on our behalf. As compensation under the device arrangement, we paid a portion of certain costs that Brightstar Subsidiary incurs plus a profit percentage. Under the accessory arrangement, we pay a percentage mark-up on the cost of accessory purchases. During the year ended March 31, 2015, three-month transition period ended March 31, 2014 and year ended December 31, 2013, we procured, through the Brightstar Subsidiary, approximately $5.3 billion, $411 million and $86 million, respectively, of device and accessory inventory, which was sold in direct and indirect channels for which we paid immaterial fees to the Brightstar Subsidiary. In mid-December 2014, we determined that the Brightstar Subsidiary will discontinue procurement of devices on our behalf and as a result, those purchasing activities are transitioning back to us.
	Amounts included in our consolidated balance sheets associated with these arrangements with the Brightstar Subsidiary were as follows:
		March 31,			March 31,
		2015			2014
		(in millions)
	Device and accessory inventory	$	410		$	266
	Accounts payable	$	16		$	205
	All other transactions under agreements with SoftBank Parties, in the aggregate, were immaterial through the period ended March 31, 2015.

Guarantor_Financial_Informatio

Guarantor Financial Information (Notes)	12 Months Ended
	Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Guarantor Financial Information	Guarantor Financial Information
	On September 11, 2013, Sprint Corporation issued $2.25 billion aggregate principal amount of 7.250% notes due 2021 and $4.25 billion aggregate principal amount of 7.875% notes due 2023 in a private placement transaction with registration rights. On December 12, 2013, Sprint Corporation issued $2.5 billion aggregate principal amount of 7.125% notes due 2024 in a private placement transaction with registration rights. Each of these issuances is fully and unconditionally guaranteed by Sprint Communications, Inc. (Subsidiary Guarantor), which is a 100 percent owned subsidiary of Sprint Corporation (Parent/Issuer). In connection with the foregoing, the registration rights agreements with respect to the notes required the Company and Sprint Communications, Inc. to use their reasonable best efforts to cause an offer to exchange the notes for a new issue of substantially identical exchange notes registered under the Securities Act of 1933. Accordingly, in November 2014, we completed an exchange offer for these notes in compliance with our registration obligations. We did not receive any proceeds from this exchange offer. In addition, on February 24, 2015, Sprint Corporation issued $1.5 billion aggregate principal amount of 7.625% notes due 2025, which are fully and unconditionally guaranteed by Sprint Communications, Inc.
	Under the Subsidiary Guarantor's revolving bank credit facility and other finance agreements, the Subsidiary Guarantor is currently restricted from paying cash dividends to the Parent/Issuer or any Non-Guarantor Subsidiary because the ratio of total indebtedness to adjusted EBITDA (each as defined in the applicable agreement) exceeds 2.5 to 1.0.
	In May 2014, certain wholly-owned subsidiaries of Sprint entered into a Receivables Facility arrangement to sell certain accounts receivable on a revolving basis, subject to a maximum funding limit of $1.3 billion. In connection with this arrangement, Sprint formed certain wholly-owned subsidiaries, which are bankruptcy remote SPEs and are included in the Non-Guarantor Subsidiaries condensed consolidated financial information (see Note 3. Significant Transactions).
	The guarantor financial information distinguishes between the Predecessor period relating to Sprint Communications for periods prior to the SoftBank Merger and the Successor period relating to Sprint Corporation (formerly Starburst II), for periods subsequent to the incorporation of Starburst II on October 5, 2012. Additionally, because the Parent/Issuer column represents the activities of Sprint Corporation (formerly Starburst II), no Parent/Issuer financial information exists for the Predecessor periods, which are prior to the SoftBank Merger. We have accounted for investments in subsidiaries using the equity method. Presented below is the condensed consolidating financial information as of the periods presented in the consolidated financial statements.
	CONDENSED CONSOLIDATING BALANCE SHEET
		As of March 31, 2015
		Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
		(in millions)
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—		$	3,492		$	518		$	—		$	4,010
	Short-term investments	—			146			20			—			166
	Accounts and notes receivable, net	84			157			2,160			(111		)	2,290
	Device and accessory inventory	—			—			1,359			—			1,359
	Deferred tax assets	—			—			62			—			62
	Prepaid expenses and other current assets	—			13			1,877			—			1,890
	Total current assets	84			3,808			5,996			(111		)	9,777
	Investments in subsidiaries	21,712			22,413			—			(44,125		)	—
	Property, plant and equipment, net	—			—			19,721			—			19,721
	Due from consolidated affiliate	68			20,934			—			(21,002		)	—
	Note receivable from consolidated affiliate	10,500			458			—			(10,958		)	—
	Intangible assets
	Goodwill	—			—			6,575			—			6,575
	FCC licenses and other	—			—			39,987			—			39,987
	Definite-lived intangible assets, net	—			—			5,893			—			5,893
	Other assets	139			1,260			836			(1,158		)	1,077
	Total assets	$	32,503		$	48,873		$	79,008		$	(77,354	)	$	83,030
	LIABILITIES AND STOCKHOLDERS' EQUITY
	Current liabilities:
	Accounts payable	$	—		$	—		$	4,347		$	—		$	4,347
	Accrued expenses and other current liabilities	154			625			4,625			(111		)	5,293
	Current portion of long-term debt, financing and capital lease obligations	—			500			800			—			1,300
	Total current liabilities	154			1,125			9,772			(111		)	10,940
	Long-term debt, financing and capital lease obligations	10,500			14,576			8,474			(1,019		)	32,531
	Deferred tax liabilities	—			—			13,898			—			13,898
	Note payable due to consolidated affiliate	—			10,500			458			(10,958		)	—
	Other liabilities	—			960			2,991			—			3,951
	Due to consolidated affiliate	139			—			21,002			(21,141		)	—
	Total liabilities	10,793			27,161			56,595			(33,229		)	61,320
	Commitments and contingencies
	Total stockholders' equity	21,710			21,712			22,413			(44,125		)	21,710
	Total liabilities and stockholders' equity	$	32,503		$	48,873		$	79,008		$	(77,354	)	$	83,030
	CONDENSED CONSOLIDATING BALANCE SHEET
		As of March 31, 2014
		Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
		(in millions)
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—		$	4,125		$	845		$	—		$	4,970
	Short-term investments	—			1,220			—			—			1,220
	Accounts and notes receivable, net	74			27			3,607			(101		)	3,607
	Device and accessory inventory	—			—			982			—			982
	Deferred tax assets	—			—			128			—			128
	Prepaid expenses and other current assets	—			14			658			—			672
	Total current assets	74			5,386			6,220			(101		)	11,579
	Investments in subsidiaries	25,316			25,588			—			(50,904		)	—
	Property, plant and equipment, net	—			—			16,299			—			16,299
	Due from consolidated affiliate	—			18,234			—			(18,234		)	—
	Note receivable from consolidated affiliate	9,000			—			—			(9,000		)	—
	Intangible assets
	Goodwill	—			—			6,383			—			6,383
	FCC licenses and other	—			—			41,978			—			41,978
	Definite-lived intangible assets, net	—			—			7,558			—			7,558
Other assets	133			1,237			674			(1,152		)	892
Total assets	$	34,523		$	50,445		$	79,112		$	(79,391	)	$	84,689
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable	$	—		$	—		$	3,163		$	—		$	3,163
Accrued expenses and other current liabilities	78			493			5,074			(101		)	5,544
Current portion of long-term debt, financing and capital lease obligations	—			—			991			—			991
Total current liabilities	78			493			9,228			(101		)	9,698
Long-term debt, financing and capital lease obligations	9,000			15,027			8,779			(1,019		)	31,787
Deferred tax liabilities	—			—			14,207			—			14,207
Note payable due to consolidated affiliate	—			9,000			—			(9,000		)	—
Other liabilities	—			609			3,076			—			3,685
Due to consolidated affiliate	133			—			18,234			(18,367		)	—
Total liabilities	9,211			25,129			53,524			(28,487		)	59,377
Commitments and contingencies
Total stockholders' equity	25,312			25,316			25,588			(50,904		)	25,312
Total liabilities and stockholders' equity	$	34,523		$	50,445		$	79,112		$	(79,391	)	$	84,689
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Successor
	Year Ended March 31, 2015
	Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	—		$	29,542		$	—		$	29,542
Equipment	—			—			4,990			—			4,990
	—			—			34,532			—			34,532
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			—			9,660			—			9,660
Cost of products (exclusive of depreciation and amortization below)	—			—			9,309			—			9,309
Selling, general and administrative	—			—			9,563			—			9,563
Impairments	—			—			2,133			—			2,133
Severance and exit costs	—			—			304			—			304
Depreciation	—			—			3,797			—			3,797
Amortization	—			—			1,552			—			1,552
Other, net	—			1			108			—			109
	—			1			36,426			—			36,427
Operating loss	—			(1		)	(1,894		)	—			(1,895		)
Other income (expense):
Interest income	687			146			3			(824		)	12
Interest expense	(687		)	(1,521		)	(667		)	824			(2,051		)
Equity in losses of unconsolidated investments, net	—			—			—			—			—
Gain on previously-held equity interests	—			—			—			—			—
(Losses) earnings of subsidiaries	(3,345		)	(1,970		)	—			5,315			—
Other income, net	—			1			14			—			15
	(3,345		)	(3,344		)	(650		)	5,315			(2,024		)
(Loss) income before income taxes	(3,345		)	(3,345		)	(2,544		)	5,315			(3,919		)
Income tax benefit	—			—			574			—			574
Net (loss) income	(3,345		)	(3,345		)	(1,970		)	5,315			(3,345		)
Other comprehensive (loss) income	(365		)	(365		)	(355		)	720			(365		)
Comprehensive (loss) income	$	(3,710	)	$	(3,710	)	$	(2,325	)	$	6,035		$	(3,710	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Successor
	Three Months Ended March 31, 2014
	Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	—		$	7,876		$	—		$	7,876
Equipment	—			—			999			—			999
	—			—			8,875			—			8,875
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			—			2,622			—			2,622
Cost of products (exclusive of depreciation and amortization below)	—			—			2,038			—			2,038
Selling, general and administrative	—			—			2,371			—			2,371
Impairments	—			—			75			—			75
Severance and exit costs	—			—			52			—			52
Depreciation	—			—			868			—			868
Amortization	—			—			429			—			429
	—			—			8,455			—			8,455
Operating income	—			—			420			—			420
Other income (expense):
Interest income	169			20			4			(189		)	4
Interest expense	(166		)	(373		)	(166		)	189			(516		)
(Losses) earnings of subsidiaries	(154		)	199			—			(45		)	—
Other expense, net	—			—			(3		)	—			(3		)
	(151		)	(154		)	(165		)	(45		)	(515		)
(Loss) income before income taxes	(151		)	(154		)	255			(45		)	(95		)
Income tax expense	—			—			(56		)	—			(56		)
Net (loss) income	(151		)	(154		)	199			(45		)	(151		)
Other comprehensive (loss) income	(145		)	(145		)	(147		)	292			(145		)
Comprehensive (loss) income	$	(296	)	$	(299	)	$	52		$	247		$	(296	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Successor
	Year Ended December 31, 2013
	Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	—		$	15,094		$	—		$	15,094
Equipment	—			—			1,797			—			1,797
	—			—			16,891			—			16,891
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			—			5,174			—			5,174
Cost of products (exclusive of depreciation and amortization below)	—			—			4,603			—			4,603
Selling, general and administrative	36			—			4,805			—			4,841
Severance and exit costs	—			—			309			—			309
Depreciation	—			—			2,026			—			2,026
Amortization	—			—			908			—			908
	36			—			17,825			—			17,861
Operating loss	(36		)	—			(934		)	—			(970		)
Other income (expense):
Interest income	189			40			6			(200		)	35
Interest expense	(163		)	(548		)	(407		)	200			(918		)
(Losses) earnings of subsidiaries	(1,831		)	(1,320		)	—			3,151			—
Other (expense) income, net	(15		)	(3		)	56			—			38
	(1,820		)	(1,831		)	(345		)	3,151			(845		)
(Loss) income before income taxes	(1,856		)	(1,831		)	(1,279		)	3,151			(1,815		)
Income tax expense	(4		)	—			(41		)	—			(45		)
Net (loss) income	(1,860		)	(1,831		)	(1,320		)	3,151			(1,860		)
Other comprehensive income (loss)	102			102			93			(195		)	102
Comprehensive (loss) income	$	(1,758	)	$	(1,729	)	$	(1,227	)	$	2,956		$	(1,758	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Predecessor
	For the 191 Days Ended July 10, 2013
	Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	16,895		$	—		$	16,895
Equipment	—			1,707			—			1,707
	—			18,602			—			18,602
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			5,673			—			5,673
Cost of products (exclusive of depreciation and amortization below)	—			4,872			—			4,872
Selling, general and administrative	—			5,067			—			5,067
Severance and exit costs	—			652			—			652
Depreciation	—			3,098			—			3,098
Amortization	—			147			—			147
Other, net	—			(22		)	—			(22		)
	—			19,487			—			19,487
Operating loss	—			(885		)	—			(885		)
Other income (expense):
Interest income	61			15			(43		)	33
Interest expense	(842		)	(336		)	43			(1,135		)
Equity in losses of unconsolidated investments, net	—			(482		)	—			(482		)
Gain on previously-held equity interests	—			2,926			—			2,926
(Losses) earnings of subsidiaries	(365		)	—			365			—
Other expense, net	(12		)	(2		)	—			(14		)
	(1,158		)	2,121			365			1,328
(Loss) income before income taxes	(1,158		)	1,236			365			443
Income tax expense	—			(1,601		)	—			(1,601		)
Net (loss) income	(1,158		)	(365		)	365			(1,158		)
Other comprehensive income (loss)	23			35			(35		)	23
Comprehensive (loss) income	$	(1,135	)	$	(330	)	$	330		$	(1,135	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Predecessor
	Three Months Ended March 31, 2013 (Unaudited)
	Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	7,980		$	—		$	7,980
Equipment	—			813			—			813
	—			8,793			—			8,793
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			2,640			—			2,640
Cost of products (exclusive of depreciation and amortization below)	—			2,293			—			2,293
Selling, general and administrative	—			2,336			—			2,336
Severance and exit costs	—			25			—			25
Depreciation	—			1,422			—			1,422
Amortization	—			70			—			70
Other, net	—			(22		)	—			(22		)
	—			8,764			—			8,764
Operating income	—			29			—			29
Other income (expense):
Interest income	29			6			(21		)	14
Interest expense	(292		)	(161		)	21			(432		)
Equity in losses of unconsolidated investments, net	—			(202		)	—			(202		)
(Losses) earnings of subsidiaries	(368		)	—			368			—
Other expense, net	(12		)	(2		)	—			(14		)
	(643		)	(359		)	368			(634		)
(Loss) income before income taxes	(643		)	(330		)	368			(605		)
Income tax expense	—			(38		)	—			(38		)
Net (loss) income	(643		)	(368		)	368			(643		)
Other comprehensive income (loss)	14			15			(15		)	14
Comprehensive (loss) income	$	(629	)	$	(353	)	$	353		$	(629	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Predecessor
	Year Ended December 31, 2012
	Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	32,097		$	—		$	32,097
Equipment	—			3,248			—			3,248
	—			35,345			—			35,345
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			10,936			—			10,936
Cost of products (exclusive of depreciation and amortization below)	—			9,905			—			9,905
Selling, general and administrative	—			9,765			—			9,765
Impairments	—			102			—			102
Severance and exit costs	—			196			—			196
Depreciation	—			6,240			—			6,240
Amortization	—			303			—			303
Other, net	—			(282		)	—			(282		)
	—			37,165			—			37,165
Operating loss	—			(1,820		)	—			(1,820		)
Other income (expense):
Interest income	112			34			(81		)	65
Interest expense	(907		)	(602		)	81			(1,428		)
Equity in losses of unconsolidated investments, net	—			(1,114		)	—			(1,114		)
(Losses) earnings of subsidiaries	(3,530		)	—			3,530			—
Other (expense) income, net	(1		)	126			—			125
	(4,326		)	(1,556		)	3,530			(2,352		)
(Loss) income before income taxes	(4,326		)	(3,376		)	3,530			(4,172		)
Income tax expense	—			(154		)	—			(154		)
Net (loss) income	(4,326		)	(3,530		)	3,530			(4,326		)
Other comprehensive (loss) income	(341		)	(339		)	339			(341		)
Comprehensive (loss) income	$	(4,667	)	$	(3,869	)	$	3,869		$	(4,667	)
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Successor
	Year Ended March 31, 2015
	Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$	—		$	(750	)	$	3,700		$	(500	)	$	2,450
Cash flows from investing activities:
Capital expenditures - network and other	—			—			(5,422		)	—			(5,422		)
Capital expenditures - leased devices	—			—			(582		)	—			(582		)
Expenditures relating to FCC licenses	—			—			(163		)	—			(163		)
Reimbursements relating to FCC licenses	—			—			95			—			95
Proceeds from sales and maturities of short-term investments	—			3,061			70			—			3,131
Purchases of short-term investments	—			(1,987		)	(90		)	—			(2,077		)
Change in amounts due from/due to consolidated affiliates	—			(2,425		)	—			2,425			—
Proceeds from sales of assets and FCC licenses	—			—			315			—			315
Intercompany note advance to consolidated affiliate	(1,481		)	(343		)	—			1,824			—
Other, net	—			—			(11		)	—			(11		)
Net cash (used in) provided by investing activities	(1,481		)	(1,694		)	(5,788		)	4,249			(4,714		)
Cash flows from financing activities:
Proceeds from debt and financings	1,500			300			130			—			1,930
Repayments of debt, financing and capital lease obligations	—			—			(574		)	—			(574		)
Debt financing costs	(21		)	(5		)	(61		)	—			(87		)
Proceeds from issuance of common stock, net	—			35			—			—			35
Intercompany dividends paid to consolidated affiliate	—			—			(500		)	500			—
Change in amounts due from/due to consolidated affiliates	2			—			2,423			(2,425		)	—
Intercompany note advance from parent	—			1,481			343			(1,824		)	—
Net cash provided by (used in) financing activities	1,481			1,811			1,761			(3,749		)	1,304
Net decrease in cash and cash equivalents	—			(633		)	(327		)	—			(960		)
Cash and cash equivalents, beginning of period	—			4,125			845			—			4,970
Cash and cash equivalents, end of period	$	—		$	3,492		$	518		$	—		$	4,010
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Successor
	Three Months Ended March 31, 2014
	Parent/Issuer			Subsidiary Guarantor			Non-			Eliminations			Consolidated
							Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$	—		$	(483	)	$	1,005		$	—		$	522
Cash flows from investing activities:
Capital expenditures	—			—			(1,488		)	—			(1,488		)
Expenditures relating to FCC licenses	—			—			(152		)	—			(152		)
Proceeds from sales and maturities of short-term investments	—			920			—			—			920
Purchases of short-term investments	—			(1,035		)	—			—			(1,035		)
Change in amounts due from/due to consolidated affiliates	—			(941		)	—			941			—
Proceeds from sales of assets and FCC licenses	—			—			1			—			1
Other, net	—			—			(2		)	—			(2		)
Net cash (used in) provided by investing activities	—			(1,056		)	(1,641		)	941			(1,756		)
Cash flows from financing activities:
Repayments of debt and capital lease obligations	—			—			(159		)	—			(159		)
Debt financing costs	—			(1		)	—			—			(1		)
Change in amounts due from/due to consolidated affiliates	—			—			941			(941		)	—
Net cash provided by (used in) financing activities	—			(1		)	782			(941		)	(160		)
Net (decrease) increase in cash and cash equivalents	—			(1,540		)	146			—			(1,394		)
Cash and cash equivalents, beginning of period	—			5,665			699			—			6,364
Cash and cash equivalents, end of period	$	—		$	4,125		$	845		$	—		$	4,970
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Successor
	Year Ended December 31, 2013
	Parent/Issuer			Subsidiary Guarantor			Non-			Eliminations			Consolidated
							Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$	9		$	(458	)	$	388		$	—		$	(61	)
Cash flows from investing activities:
Capital expenditures	—			—			(3,847		)	—			(3,847		)
Expenditures relating to FCC licenses	—			—			(146		)	—			(146		)
Acquisitions, net of cash acquired	(16,640		)	2,528			—			—			(14,112		)
Proceeds from sales and maturities of short-term investments	—			1,715			—			—			1,715
Purchases of short-term investments	—			(1,719		)	—			—			(1,719		)
Change in amounts due from/due to consolidated affiliates	—			(7,189		)	—			7,189			—
Proceeds from sales of assets and FCC licenses	—			—			7			—			7
Investment in consolidated affiliate	(1,900		)	—			—			1,900			—
Intercompany note advance to consolidated affiliate	(8,861		)	—			—			8,861			—
Other, net	—			—			(6		)	—			(6		)
Net cash (used in) provided by investing activities	(27,401		)	(4,665		)	(3,992		)	17,950			(18,108		)
Cash flows from financing activities:
Proceeds from debt and financings	9,000			—			500			—			9,500
Repayments of debt and capital lease obligations	—			—			(3,378		)	—			(3,378		)
Debt financing costs	(139		)	—			(8		)	—			(147		)
Proceeds from issuance of common stock, net	18,540			27			—			—			18,567
Change in amounts due from/due to consolidated affiliates	—			—			7,189			(7,189		)	—
Intercompany note advance from parent	—			8,861			—			(8,861		)	—
Equity contribution from parent	—			1,900			—			(1,900		)	—
Other, net	(14		)	—			—			—			(14		)
Net cash provided by (used in) financing activities	27,387			10,788			4,303			(17,950		)	24,528
Net (decrease) increase in cash and cash equivalents	(5		)	5,665			699			—			6,359
Cash and cash equivalents, beginning of period	5			—			—			—			5
Cash and cash equivalents, end of period	$	—		$	5,665		$	699		$	—		$	6,364
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Predecessor
	For the 191 Days Ended July 10, 2013
	Subsidiary Guarantor			Non-			Eliminations			Consolidated
				Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$	(559	)	$	3,230		$	—		$	2,671
Cash flows from investing activities:
Capital expenditures	—			(3,140		)	—			(3,140		)
Expenditures relating to FCC licenses	—			(125		)	—			(125		)
Acquisitions, net of cash acquired	(4,039		)	—			—			(4,039		)
Investment in Clearwire (including debt securities)	—			(308		)	—			(308		)
Proceeds from sales and maturities of short-term investments	2,445			—			—			2,445
Purchases of short-term investments	(1,221		)	—			—			(1,221		)
Change in amounts due from/due to consolidated affiliates	(372		)	—			372			—
Proceeds from sales of assets and FCC licenses	—			10			—			10
Other, net	—			(7		)	—			(7		)
Net cash (used in) provided by investing activities	(3,187		)	(3,570		)	372			(6,385		)
Cash flows from financing activities:
Proceeds from debt and financings	—			204			—			204
Repayments of debt and capital lease obligations	—			(362		)	—			(362		)
Debt financing costs	(11		)	—			—			(11		)
Proceeds from issuance of common stock, net	60			—			—			60
Change in amounts due from/due to consolidated affiliates	—			372			(372		)	—
Net cash provided by (used in) financing activities	49			214			(372		)	(109		)
Net decrease in cash and cash equivalents	(3,697		)	(126		)	—			(3,823		)
Cash and cash equivalents, beginning of period	5,218			1,133			—			6,351
Cash and cash equivalents, end of period	$	1,521		$	1,007		$	—		$	2,528
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Predecessor
	Three Months Ended March 31, 2013 (Unaudited)
	Subsidiary Guarantor			Non-			Eliminations			Consolidated
				Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$	(210	)	$	1,150		$	—		$	940
Cash flows from investing activities:
Capital expenditures	—			(1,381		)	—			(1,381		)
Expenditures relating to FCC licenses	—			(55		)	—			(55		)
Investment in Clearwire (including debt securities)	—			(80		)	—			(80		)
Proceeds from sales and maturities of short-term investments	1,281			—			—			1,281
Purchases of short-term investments	(926		)	—			—			(926		)
Change in amounts due from/due to consolidated affiliates	(236		)	—			236			—
Proceeds from sales of assets and FCC licenses	—			6			—			6
Other, net	—			(3		)	—			(3		)
Net cash provided by (used in) investing activities	119			(1,513		)	236			(1,158		)
Cash flows from financing activities:
Proceeds from debt and financings	—			204			—			204
Repayments of debt and capital lease obligations	—			(59		)	—			(59		)
Debt financing costs	(10		)	—			—			(10		)
Proceeds from issuance of common stock, net	7			—			—			7
Change in amounts due from/due to consolidated affiliates	—			236			(236		)	—
Net cash provided by (used in) financing activities	(3		)	381			(236		)	142
Net (decrease) increase in cash and cash equivalents	(94		)	18			—			(76		)
Cash and cash equivalents, beginning of period	5,218			1,133			—			6,351
Cash and cash equivalents, end of period	$	5,124		$	1,151		$	—		$	6,275
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Predecessor
	Year Ended December 31, 2012
	Subsidiary Guarantor			Non-			Eliminations			Consolidated
				Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$	(728	)	$	3,727		$	—		$	2,999
Cash flows from investing activities:
Capital expenditures	—			(4,261		)	—			(4,261		)
Expenditures relating to FCC licenses	—			(198		)	—			(198		)
Investment in Clearwire (including debt securities)	—			(228		)	—			(228		)
Proceeds from sales and maturities of short-term investments	1,513			—			—			1,513
Purchases of short-term investments	(3,212		)	—			—			(3,212		)
Change in amounts due from/due to consolidated affiliates	(5,610		)	—			5,610			—
Proceeds from sales of assets and FCC licenses	—			19			—			19
Other, net	—			(8		)	—			(8		)
Net cash (used in) provided by investing activities	(7,309		)	(4,676		)	5,610			(6,375		)
Cash flows from financing activities:
Proceeds from debt and financings	8,880			296			—			9,176
Repayments of debt and capital lease obligations	—			(4,791		)	—			(4,791		)
Debt financing costs	(105		)	(29		)	—			(134		)
Proceeds from issuance of common stock, net	29			—			—			29
Change in amounts due from/due to consolidated affiliates	—			5,610			(5,610		)	—
Net cash provided by (used in) financing activities	8,804			1,086			(5,610		)	4,280
Net increase in cash and cash equivalents	767			137			—			904
Cash and cash equivalents, beginning of period	4,451			996			—			5,447
Cash and cash equivalents, end of period	$	5,218		$	1,133		$	—		$	6,351

Summary_of_Significant_Account1

Summary of Significant Accounting Policies and Other Information (Policies)	12 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Consolidation and Estimates	Basis of Consolidation and Estimates
	The consolidated financial statements include our accounts, those of our 100% owned subsidiaries, and subsidiaries we control or in which we have a controlling financial interest. All intercompany transactions and balances have been eliminated in consolidation. Prior to the Clearwire Acquisition Date, we applied the equity method of accounting to the investment in Clearwire because we did not have a controlling vote or the ability to control operating and financial policies.
	The consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP). This requires management of the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements. Significant estimates and assumptions are used for, but are not limited to, allowance for doubtful accounts, estimated economic lives and residual values of property, plant and equipment, fair value of identified purchased tangible and intangible assets in a business combination, fair value assessments for purposes of impairment testing, valuation of guarantee liabilities and litigation reserves.
	Certain prior period amounts have been reclassified to conform to the current period presentation, including separately presenting Service revenue and Equipment revenue from Net operating revenues and separately presenting Cost of services and Cost of products from Net operating expenses.
	Change in Estimate
	When estimating the value of returned inventory, we evaluate many factors and obtain information to support the estimated value of used devices and the useful lives. Recently, we have observed sustained value and extended useful lives for handsets leading to an increase in the estimated value for returned inventory. As a result, we revised our methodology and assumptions used in estimating the value for returned handsets during the year ended March 31, 2015.
	The change in estimate was accounted for on a prospective basis. The effect of the change in estimate, which was included in "Cost of products" in our consolidated statements of operations, reduced our operating loss by approximately $80 million, or $0.02 per basic and diluted share, for the year ended March 31, 2015. In addition, this change resulted in an increase to "Device and accessory inventory" on the consolidated balance sheet of approximately $80 million.
Cash and Cash Equivalents	Cash and Cash Equivalents
	Cash equivalents generally include highly liquid investments with maturities at the time of purchase of three months or less. These investments may include money market funds, certificates of deposit, U.S. government and government-sponsored debt securities, corporate debt securities, municipal securities, bank-related securities, and credit and debit card transactions in process. The carrying amounts approximate fair value.
Installment Receivables and Allowance for Doubtful Accounts	Installment Receivables
	The carrying value of installment receivables approximates fair value because the receivables are recorded at their present value, net of the deferred interest and allowance for credit losses. At the time of sale, we impute the interest on the installment receivable and record it as a reduction to revenue and as a reduction to the face amount of the related receivable. Interest income is recognized over the term of the installment contract as service revenue.
	We categorize our installment receivables as prime and subprime based upon subscriber credit profiles and as unbilled, billed-current and billed-past due based upon the age of the receivable. We use proprietary scoring systems that measure the credit quality of our receivables using several factors, such as credit bureau information, subscriber credit risk scores and service plan characteristics. Payment history is subsequently monitored to further evaluate credit profiles. Prime subscriber receivables are those with lower delinquency risk and subprime subscriber receivables are those with higher delinquency risk. Subscribers within the subprime category may be required to pay a down payment on their device and accessory purchases. Installment receivables for which invoices have not yet been generated for the customer are considered unbilled. Installment receivables for which invoices have been generated but which are not past the contractual due date are considered billed - current. Installment receivables for which invoices have been generated and the payment is approximately ten days past the contractual due date are considered billed - past due. Account balances are written-off if collection efforts are unsuccessful and future collection is unlikely based on the length of time from the day accounts become past due.
	Allowance for Doubtful Accounts
	An allowance for doubtful accounts is established to cover probable and reasonably estimable losses. Because of the number of subscriber accounts, it is not practical to review the collectability of each of those accounts individually to determine the amount of allowance for doubtful accounts each period, although some account level analysis is performed with respect to large wireless and wireline subscribers. The estimate of allowance for doubtful accounts considers a number of factors, including collection experience, installment billing arrangements, aging of the accounts receivable portfolios, credit quality of the subscriber base and other qualitative considerations, including macro-economic factors. Account balances are written-off if collection efforts are unsuccessful and future collection is unlikely based on the length of time from the day accounts become past due. Amounts written off against the allowance for doubtful accounts, net of recoveries and other adjustments, were $752 million, $106 million and $98 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, and $374 million, $105 million, and $549 million, for the Predecessor 191-day period ended July 10, 2013, the unaudited three-month period ended March 31, 2013, and year ended December 31, 2012, respectively. See Note 4. Installment Receivables for additional information as it relates to the allowance for doubtful accounts specifically attributable to installment receivables.
Device and Accessory Inventory	Device and Accessory Inventory
	Inventories are stated at the lower of cost or market. Cost is determined by the first-in, first-out (FIFO) method. The Company sells wireless devices separately or in conjunction with a service contract. When the device is sold below cost, the cost and related revenues generated from the device sales (equipment net subsidy) are recognized at the time of sale. Expected equipment net subsidy is not recognized prior to the time of sale because the promotional discount decision is generally made at the point of sale and because the equipment net subsidies are expected to be recovered through service revenues.
	The net realizable value of devices and other inventory is analyzed on a regular basis. This analysis includes assessing obsolescence, sales forecasts, product life cycle, marketplace and other considerations. If assessments regarding the above factors adversely change, we may sell devices at a higher subsidy or record a write-down to inventory for obsolete or slow-moving items prior to the point of sale.
Property, Plant and Equipment	Property, Plant and Equipment
	Property, plant and equipment (PP&E), including improvements that extend useful lives, are recognized at cost. Depreciation on property, plant and equipment is generally calculated using the straight-line method based on estimated economic useful lives of 3 to 30 years for buildings and improvements and network equipment, site costs and related software and 3 to 12 years for non-network internal use software, office equipment and other. Leasehold improvements are depreciated over the shorter of the lease term or the estimated useful life of the respective assets. Leased devices are depreciated using the straight-line method to their estimated residual value at the end of the term of the lease, which ranges from 12 to 30 months. We calculate depreciation on certain network assets using the group life method. Accordingly, ordinary asset retirements and disposals on those assets are charged against accumulated depreciation with no gain or loss recognized. Gains or losses associated with all other asset retirements or disposals are recognized in the consolidated statements of operations. Depreciation rates for assets are revised periodically to account for changes, if any, related to management's strategic objectives, technological changes, estimated residual values, or obsolescence. Changes in our estimates will result in adjustment to depreciation prospectively over the estimated useful lives of our non-leased assets and over the remaining lease term for devices leased to our customers. Repair and maintenance costs and research and development costs are expensed as incurred.
	We capitalize costs for network and non-network software developed or obtained for internal use during the application development stage. These costs are included in PP&E and, when the software is placed in service, are depreciated over estimated useful lives of three to five years. Costs incurred during the preliminary project and post-implementation stage, as well as maintenance and training costs, are expensed as incurred.
Long-Lived Asset Impairment	Long-Lived Asset Impairment
	Sprint evaluates long-lived assets, including intangible assets subject to amortization, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. Asset groups are determined at the lowest level for which identifiable cash flows are largely independent of cash flows of other groups of assets and liabilities. When the carrying amount of a long-lived asset group is not recoverable and exceeds its fair value, an impairment loss is recognized equal to the excess of the asset group’s carrying value over the estimated fair value. See Note 6. Property, Plant and Equipment for additional information on long-lived asset impairments.
	Certain assets that have not yet been deployed in the business, including network equipment, cell site development costs and software in development, are periodically assessed to determine recoverability. Network equipment and cell site development costs are expensed whenever events or changes in circumstances cause the Company to conclude the assets are no longer needed to meet management's strategic network plans and will not be deployed. Software development costs are expensed when it is no longer probable that the software project will be deployed. Network equipment that has been removed from the network is also periodically assessed to determine recoverability. If we experience significant operational challenges, including retaining and attracting subscribers, future cash flows of the Company may not be sufficient to recover the carrying value of our wireless asset group, and we could record asset impairments that are material to Sprint's consolidated results of operations and financial condition.
Indefinite-Lived Intangible Assets	Indefinite-Lived Intangible Assets
	Our indefinite-lived intangible assets primarily consist of goodwill, certain of our trademarks and FCC licenses. Goodwill represents the excess of consideration paid over the estimated fair value of the net tangible and identifiable intangible assets acquired in business combinations. In determining whether an intangible asset, other than goodwill, is indefinite-lived, we consider the expected use of the assets, the regulatory and economic environment within which they are being used, and the effects of obsolescence on their use. We assess our indefinite-lived intangible assets, including goodwill, for impairment at least annually or, if necessary, more frequently, whenever events or changes in circumstances indicate the asset may be impaired.
Guarantee Liabilities	Guarantee Liabilities
	Under certain of our wireless service plans, we offer an option to our subscribers to purchase, on a monthly basis, an annual trade-in right (the option). At the trade-in date, a subscriber, who has elected to purchase a device in an installment billing arrangement, will receive a credit in the amount of the outstanding balance of the remaining installment payments provided the subscriber trades-in an eligible used device in good working condition and purchases a new device from Sprint. Additionally, the subscriber must have purchased the option for the twelve consecutive months preceding the trade-in. When a subscriber elects the option, the total estimated arrangement proceeds associated with the subscriber are reduced by the estimated fair value of the fixed-price trade-in credit (guarantee liability) and the remaining proceeds are allocated amongst the other deliverables in the arrangement. The guarantee liability is estimated based on assumptions, including, but not limited to, the expected fair value of the used device at trade-in, subscribers’ estimated remaining balance of the installment receivable, and the probability and timing of the trade-in. When the subscriber elects to exercise the trade-in right, the difference between the outstanding balance of the installment receivable and the estimated fair value of the returned device is recorded as a reduction of the guarantee liability. If the subscriber elects to stop purchasing the option prior to, or after, becoming eligible to exercise the trade-in right, we recognize the amount of the associated guarantee liability as operating revenue. At each reporting date, we reevaluate our estimate of the guarantee liability. If all subscribers, who elected the option, were to claim their benefit at the earliest contractual time of eligible trade-in, the maximum amount of the guarantee liability (i.e., the estimated unpaid balance of the subscribers' installment contracts) would be approximately $248 million as of March 31, 2015. This amount is not an indication of the Company's expected loss exposure because it does not consider the expected fair value of the used handset, which is required to be returned to us in good working condition at trade-in, nor does it consider the probability and timing of trade-in. The total guarantee liabilities associated with the option, which are recorded in "Accrued expenses and other current liabilities" in the consolidated balance sheets, were immaterial.
Benefit Plans	Benefit Plans
	We provide a defined benefit pension plan and certain other postretirement benefits to certain employees, and we sponsor a defined contribution plan for all employees.
	In June 2014, the Company’s Board of Directors approved a plan amendment to the Sprint Retirement Pension Plan (the Plan) to offer certain terminated participants, who had not begun to receive Plan benefits, the opportunity to voluntarily elect to receive their benefits as an immediate lump sum distribution. Upon expiration of the election period and completion of cash payments on November 28, 2014, the lump sum distribution, totaling approximately $560 million, created a settlement event that resulted in a $59 million charge, which is reflected in "Other, net" in the consolidated statements of operations, and a reduction in the projected benefit obligation of approximately $300 million, impacted by the settlement as well as a change in the mortality tables and a change in the discount rate used to estimate the projected benefit obligation.
	As of March 31, 2015 and 2014, the fair value of our pension plan assets and certain other postretirement benefit plan assets in aggregate was $1.3 billion and $1.8 billion, respectively, and the fair value of our projected benefit obligations in aggregate was $2.2 billion and $2.4 billion, respectively. As a result, the plans were underfunded by approximately $900 million and $600 million at March 31, 2015 and 2014, respectively, and were recorded as a net liability in our consolidated balance sheets. Estimated contributions totaling approximately $8 million are expected to be paid during the fiscal year 2015.
	The offset to the pension liability is recorded in equity as a component of "Accumulated other comprehensive loss," net of tax, including $393 million, $147 million, and $93 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014, year ended December 31, 2013, respectively, which is amortized to "Selling, general and administrative" in Sprint's consolidated statements of operations. The change in the net liability of the Plan in the Successor year ended March 31, 2015 was affected by the impact of the settlement event on the projected benefit obligation combined with a change in the discount rate used to estimate the projected benefit obligation, decreasing from 4.9% for the Successor three-month transition period ended March 31, 2014 to 4.2% for the Successor year ended March 31, 2015. The change in the net liability of the Plan in the Successor three-month transition period ended March 31, 2014 and year ended December 31, 2013 was affected primarily by a change in the discount rate used to estimate the projected benefit obligation, decreasing from 5.3% to 4.9% for the Successor three-month transition period ended March 31, 2014. We intend to make future cash contributions to the Plan in an amount necessary to meet minimum funding requirements according to applicable benefit plan regulations.
	As of December 31, 2005, the Plan was amended to freeze benefit plan accruals for participants. The objective for the investment portfolio of the pension plan is to achieve a long-term nominal rate of return, net of fees, which exceeds the plan's long-term expected rate of return on investments for funding purposes which was 7.75% at March 31, 2015 and 2014. To meet this objective, our investment strategy for the year ended March 31, 2015 was governed by an asset allocation policy, whereby a targeted allocation percentage is assigned to each asset class as follows: 38% to U.S. equities; 16% to international equities; 28% to fixed income investments; 9% to real estate investments; and 9% to other investments including hedge funds. Actual allocations are allowed to deviate from target allocation percentages within a range for each asset class as defined in the investment policy.
	Investments of the Plan are measured at fair value on a recurring basis which is determined using quoted market prices or estimated fair values. As of March 31, 2015, 47% of the investment portfolio was valued at quoted prices in active markets for identical assets; 35% was valued using quoted prices for similar assets in active or inactive markets, or other observable inputs; and 18% was valued using unobservable inputs that are supported by little or no market activity.
	Under our defined contribution plan, participants may contribute a portion of their eligible pay to the plan through payroll withholdings. For the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014, and the year ended December 31, 2013, the Company matched 100% of the participants' pre-tax and Roth contribution (in aggregate) on the first 3% of eligible compensation and 50% of the participants' pre-tax and Roth contribution (in aggregate) on the next 2% of eligible compensation up to a maximum matching contribution of 4%. For the Predecessor year ended December 31, 2012, the Company matched 50% of participants' contributions up to 2% of their eligible compensation. Fixed matching contributions totaled approximately $71 million, $15 million and $35 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $32 million, $15 million, and $30 million for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period ended March 31, 2013, and year ended December 31, 2012, respectively. Prior to 2013, the Company also made a discretionary matching contribution, as determined by the Board of Directors of the Company, equal to 100% of participants' contributions up to 3.95% of eligible compensation, or $60 million, in the Predecessor year ended December 31, 2012 based upon the attainment of certain profitability levels
Revenue Recognition	Revenue Recognition
	Operating revenues primarily consist of wireless service revenues, revenues generated from device and accessory sales, revenues from leasing a device, revenues from wholesale operators and third-party affiliates, as well as long distance voice, data and Internet revenues. Service revenues consist of fixed monthly recurring charges, variable usage charges and miscellaneous fees such as activation fees, directory assistance, roaming, equipment protection, late payment and early termination charges, interest, and certain regulatory related fees, net of service credits and other adjustments. We generally recognize service revenues as services are rendered, assuming all other revenue recognition criteria are met. We recognize revenue for access charges and other services charged at fixed amounts ratably over the service period, net of credits and adjustments for service discounts, billing disputes and fraud or unauthorized usage. As a result of the cutoff times of our multiple billing cycles each month, we are required to estimate the amount of subscriber revenues earned but not billed from the end of each billing cycle to the end of each reporting period. These estimates are based primarily on rate plans in effect and our historical usage and billing patterns. Regulatory fees and costs are recorded gross. The largest component of the regulatory fees is the universal service fund, which represented no more than 2% of net operating revenues for all periods presented in the consolidated statements of operations.
	We recognize equipment revenue and corresponding costs of devices when title and risk of loss passes to the indirect dealer or end-use subscriber. For arrangements involving multiple deliverables such as equipment and service, revenue is allocated to the deliverables based on their relative selling prices. Equipment revenue is limited to the amount of non-contingent consideration received when the device is sold to a subscriber. Equipment revenue is also reduced by the estimated amount of imputed interest associated with installment receivables for subscribers who elect to finance the purchase of a device for up to a 24-month period. Often, we subsidize the cost of the device as an incentive to retain and acquire subscribers. The cost of these incentives is recorded as a reduction to revenue upon activation of the device and a service contract.
	Qualified subscribers can lease a device for a contractual period of time. At the end of the lease term, subscribers have the option to turn in their devices, continue leasing their device or purchase the device. Accounting for device leases involves specific determinations under applicable lease accounting standards, which involve complex and prescriptive provisions. These provisions impact the timing and amount of revenue recognized for our leased devices. The critical elements that are considered with respect to our lease accounting are the economic life of the device and the fair value of the device, including the residual value. We only lease devices to qualifying subscribers that also purchase a service plan. To date, substantially all of our device leases were classified as operating leases. Revenues under these arrangements are allocated considering the relative fair values of the lease and non-lease elements included in the multiple-element arrangement. The amount of the arrangement consideration allocated to the operating lease element is recognized ratably over the lease term, which is typically two years.
	If a multiple-element arrangement includes an option to purchase, on a monthly basis, an annual trade-in right, the amount of the total arrangement consideration is reduced by the estimated fair value of the trade-in right or the guarantee and the remaining proceeds are then allocated amongst the other deliverables in the arrangement.
	The accounting estimates related to the recognition of revenue require us to make assumptions about numerous factors such as future billing adjustments for disputes with subscribers, unauthorized usage, future returns, mail-in rebates on device sales, the fair value of a trade-in right and the total arrangement consideration.
Leased Devices
Dealer Commissions	Dealer Commissions
	Cash consideration given by us to a dealer or end-use subscriber is presumed to be a reduction of revenue unless we receive, or will receive, an identifiable benefit in exchange for the consideration, and the fair value of such benefit can be reasonably estimated, in which case the consideration will generally be recorded as a selling expense or a purchase of inventory. We compensate our dealers using specific compensation programs related to the sale of our devices and our subscriber service contracts, or both. When a commission is earned by a dealer solely due to a selling activity relating to wireless service, the cost is recorded as a selling expense. When a commission is earned by a dealer due to the dealer selling devices purchased from us, the cost is recorded as a reduction to equipment revenue. Commissions are generally earned upon sale of device, service, or both, to an end-use subscriber. Incentive payments to dealers for sales associated with devices and service contracts are classified as contra-revenue, to the extent the incentive payment is reimbursement of loss on the device, and selling expense for the amount associated with the selling effort. Incentive payments to certain indirect dealers who purchase devices from other sources, such as the original equipment manufacturer (OEM), are recognized as selling expense when the device is activated with a Sprint service plan because Sprint does not recognize any equipment revenue or cost of products for those transactions.
Severance and Exit Costs	Severance and Exit Costs
	Liabilities for severance and exit costs are recognized based upon the nature of the cost to be incurred. For involuntary separation plans that are completed within the guidelines of our written involuntary separation plan, a liability is recognized when it is probable and reasonably estimable. For voluntary separation plans (VSP) a liability is recognized when the VSP is irrevocably accepted by the employee. For one-time termination benefits, such as additional severance pay or benefit payouts, and other exit costs, such as lease termination costs, the liability is measured and recognized initially at fair value in the period in which the liability is incurred, with subsequent changes to the liability recognized as adjustments in the period of change. Severance and exit costs associated with business combinations are recorded in the results of operations when incurred.
Compensation Plans	Compensation Plans
	As of March 31, 2015, Sprint sponsored three incentive plans: the 2007 Omnibus Incentive Plan (2007 Plan); the 1997 Long-Term Incentive Program (1997 Program); and the Nextel Incentive Equity Plan (Nextel Plan) (together, "Compensation Plans"). Sprint also sponsors an Employee Stock Purchase Plan (ESPP). Under the 2007 Plan, we may grant share and non-share based awards, including stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units and other equity-based and cash awards to employees, outside directors and other eligible individuals as defined by the plan. As of March 31, 2015, the number of shares available and reserved for future grants under the 2007 Plan and ESPP totaled approximately 172 million common shares. The Compensation Committee of our board of directors, or one or more executive officers should the Compensation Committee so authorize, as provided in the 2007 Plan, will determine the terms of each share and non-share based award. No new grants can be made under the 1997 Program or the Nextel Plan. We use new shares to satisfy share-based awards or treasury shares, if available.
	The fair value of each option award is estimated on the grant date using the Black-Scholes option valuation model, based on several assumptions including the risk-free interest rate, volatility, expected dividend yield and expected term. During the Successor year ended March 31, 2015, the Company granted approximately 23 million stock options with a weighted average grant date fair value of $3.09 per share based upon assumptions of a risk free interest rate from 1.80% to 2.06%, weighted average expected volatility from 47.0% to 59.1%, expected dividend yield of 0% and expected term from 5.5 years years to 6.5 years years. In general, options are granted with an exercise price equal to the market value of the underlying shares on the grant date, vest on an annual basis over three years, and have a contractual term of ten years. As of March 31, 2015, 40 million options were outstanding, of which 19 million options were exercisable.
	The fair value of each restricted stock unit award is calculated using the share price at the date of grant. Restricted stock units generally have performance and service requirements or service requirements only with vesting periods ranging from one to three years. Employees and directors who are granted restricted stock units are not required to pay for the shares but generally must remain employed with us, or continue to serve as a member of our board of directors, until the restrictions lapse, which is typically three years for employees and one year for directors. Certain restricted stock units outstanding as of March 31, 2015, are entitled to dividend equivalents paid in cash, if dividends are declared and paid on common shares, but performance-based restricted stock units are not entitled to dividend equivalent payments until the applicable performance and service criteria have been met. During the Successor year ended March 31, 2015, the Company granted approximately 6 million service only and performance-based restricted stock units with a weighted average grant date fair value of $7.39 per share. At March 31, 2015, approximately 17 million restricted stock unit awards were outstanding.
	Compensation Costs
	The cost of employee services received in exchange for share-based awards classified as equity is measured using the estimated fair value of the award on the date of the grant, and that cost is recognized over the period that the award recipient is required to provide service in exchange for the award. Awards of instruments classified as liabilities are measured at the estimated fair value at each reporting date through settlement.
	Pre-tax share and non-share based compensation charges from our incentive plans included in net loss were $86 million, $35 million and $98 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014, and the year ended December 31, 2013, respectively, and $37 million, $17 million and $82 million for the Predecessor 191-day period ended July 10, 2013, unaudited three month-period ended March 31, 2013 and year ended December 31, 2012, respectively. The net income tax benefit (expense) recognized in the consolidated financial statements for share-based compensation awards was $34 million, $12 million and $34 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $2 million, $(1) million and $14 million for the Predecessor 191-day period ended July 10, 2013, unaudited three-month period March 31, 2013 and year ended December 31, 2012, respectively. As of March 31, 2015, there was $76 million of total unrecognized compensation cost related to non-vested incentive awards that are expected to be recognized over a weighted average period of 1.75 years.
Advertising Costs	Advertising Costs
	We recognize advertising expense when incurred as selling, general and administrative expense. Advertising expenses totaled $1.5 billion, $408 million and $697 million for the Successor year ended March 31, 2015, the three-month transition period ended March 31, 2014 and year ended December 31, 2013, respectively, and $858 million, $409 million and $1.4 billion for the Predecessor 191-day period ended July 10, 2013, the unaudited three-month period March 31, 2013 and year ended December 31, 2012, respectively.
New Accounting Pronouncements	New Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (FASB) issued authoritative guidance regarding Reporting of Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. The updated guidance defines discontinued operations as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has, or will have, a major effect on an entity’s operations and financial results. Additionally, the disclosure requirements for discontinued operations were expanded and new disclosures for individually significant dispositions that do not qualify as discontinued operations are required. The guidance is effective prospectively for fiscal years and interim reporting periods within those years beginning after December 15, 2014, with early adoption permitted for transactions that have not been reported in financial statements previously issued or available for issuance. The standard will be effective for the Company's fiscal year beginning April 1, 2015 and will be applied to relevant future transactions.
	In May 2014, the FASB issued new authoritative literature, Revenue from Contracts with Customers. The issuance is part of a joint effort by the FASB and the International Accounting Standards Board (IASB) to enhance financial reporting by creating common revenue recognition guidance for U.S. GAAP and International Financial Reporting Standards and, thereby, improving the consistency of requirements, comparability of practices and usefulness of disclosures. The new standard will supersede much of the existing authoritative literature for revenue recognition. As currently written, the standard and related amendments will be effective for the Company for its annual reporting period beginning April 1, 2017, including interim periods within that reporting period, and early application is not permitted. In April 2015, the FASB issued a proposal to defer the effective date of the new literature by one year but allow companies to early adopt according to the original effective date. Entities are allowed to transition to the new standard by either retrospective application or recognizing the cumulative effect. The Company is currently evaluating the guidance, including which transition approach will be applied and the estimated impact it will have on our consolidated financial statements.
	In June 2014, the FASB issued authoritative guidance regarding Compensation - Stock Compensation, which provides guidance on how to treat performance targets that can be achieved after the requisite service period. The updated guidance requires that a performance target that affects vesting and could be achieved after the requisite service period be treated as a performance condition and accounted for under current guidance as opposed to a nonvesting condition that would impact the grant-date fair value of the award. The guidance is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015 with early adoption permitted. Entities may apply the amendments either (i) prospectively to all awards granted or modified after the effective date; or (ii) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter with the cumulative effect as an adjustment to the opening retained earnings balance as of the beginning of the earliest annual period presented. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.
	In August 2014, the FASB issued authoritative guidance regarding Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which requires management to assess an entity’s ability to continue as a going concern and to provide related footnote disclosures in certain circumstances. The updated guidance requires management to perform interim and annual assessments on whether there are conditions or events, considered in the aggregate, that raise substantial doubt about an entity’s ability to continue as a going concern within one year after the date that the financial statements are issued and to provide related disclosures, if required. The standard will be effective for the Company’s fiscal year ending March 31, 2017, although early adoption is permitted. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.
	In January 2015, the FASB issued authoritative guidance on Extraordinary and Unusual Items, eliminating the concept of extraordinary items. The issuance is part of the FASB’s initiative to reduce complexity in accounting standards. Under the current guidance, an entity is required to separately classify, present and disclose events and transactions that meet the criteria for extraordinary classification. Under the new guidance, reporting entities will no longer be required to consider whether an underlying event or transaction is extraordinary, however, presentation and disclosure guidance for items that are unusual in nature or occur infrequently was retained and expanded to include items that are both unusual in nature and infrequently occurring. The amendments are effective for the Company’s fiscal year beginning April 1, 2016, although early adoption is permitted if applied from the beginning of a fiscal year. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.
	In February 2015, the FASB issued authoritative guidance regarding Consolidation, which provides guidance to management when evaluating whether they should consolidate certain legal entities. The updated guidance modifies evaluation criteria of limited partnerships and similar legal entities, eliminates the presumption that a general partner should consolidate a limited partnership, and affects the consolidation analysis of reporting entities that are involved with variable interest entities, particularly those that have fee arrangements and related party relationships. All legal entities will be subject to reevaluation under the revised consolidation model. The standard will be effective for the Company’s annual reporting period beginning April 1, 2016, including interim periods within that reporting period, although early adoption is permitted. The Company is currently evaluating the newly issued guidance and assessing the impact it will have on our consolidated financial statements.
	In April 2015, the FASB issued authoritative guidance regarding Interest - Imputation of Interest, which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The guidance is effective for fiscal years and interim reporting periods within those years beginning after December 31, 2015, with early adoption permitted. The standard will be effective for the Company’s fiscal year beginning April 1, 2016. The Company does not expect the adoption of this guidance to have a material effect on our consolidated financial statements.

Significant_Transactions_Table

Significant Transactions (Tables)	12 Months Ended
	Mar. 31, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Schedule of Pro Forma Financial Information	The following unaudited pro forma consolidated results of operations assume that the SoftBank Merger and Clearwire Acquisition were completed as of January 1, 2012.
		Years Ended December 31,
		2013			2012
		(in millions)
	Net operating revenues	$	35,953		$	35,918
	Net loss	$	(4,290	)	$	(5,141	)
	Basic loss per common share	$	(1.12	)	$	(1.35	)
Clearwire Acquisition [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the purchase price allocation of consideration in the Clearwire Acquisition:
	Purchase Price Allocation (in millions):
	Current assets	$	778
	Property, plant and equipment	1,245
	Identifiable intangibles	12,870
	Goodwill	437
	Other assets	25
	Current liabilities	(1,070		)
	Long-term debt	(4,288		)
	Deferred tax liabilities	(2,130		)
	Other liabilities	(876		)
	Net assets acquired	$	6,991
SoftBank Merger [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the purchase price allocation of consideration transferred:
	Purchase Price Allocation (in millions):
	Current assets	$	8,576
	Investments	133
	Property, plant and equipment	14,558
	Identifiable intangibles	50,672
	Goodwill	6,343
	Other assets	244
	Current liabilities	(10,623		)
	Long-term debt	(29,481		)
	Deferred tax liabilities	(14,256		)
	Other liabilities	(3,989		)
	Net assets acquired, prior to conversion of the Bond	22,177
	Conversion of Bond	3,100
	Net assets acquired, after conversion of the Bond	$	25,277

Installment_Receivables_Instal

Installment Receivables Installment Receivables (Tables)	12 Months Ended
	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Installment Receivables	The following table summarizes the installment receivables:
		March 31,			March 31,
		2015			2014
		(in millions)
	Installment receivables, gross	$	1,725		$	740
	Deferred interest	(139		)	(77		)
	Installment receivables, net of deferred interest	1,586			663
	Allowance for credit losses	(190		)	(47		)
	Installment receivables, net	$	1,396		$	616
	Classified on the consolidated balance sheets as:
	Accounts and notes receivable, net	$	1,035		$	299
	Other assets	361			317
	Installment receivables, net	$	1,396		$	616
Balance and Aging of Installment Receivables	The balance and aging of installment receivables on a gross basis by credit category were as follows:
		March 31, 2015								March 31, 2014
		Prime			Subprime			Total		Prime		Subprime		Total
		(in millions)
	Unbilled	$	1,243		$	359		$	1,602	$	466	$	242	$	708
	Billed - current	65			22			87		16		9		25
	Billed - past due	21			15			36		5		2		7
	Installment receivables, gross	$	1,329		$	396		$	1,725	$	487	$	253	$	740
Allowance for Credit Losses on Financing Receivables	Activity in the deferred interest and allowance for credit losses for the installment receivables for the year ended March 31, 2015, the three months ended March 31, 2014 and since the inception of the program in September 2013 through December 31, 2013 was as follows:
		Year Ended			Three Months Ended			Year Ended
		March 31,			March 31,			December 31,
		2015			2014			2013
		(in millions)
	Deferred interest and allowance for credit losses, beginning of period	$	124		$	13		$	—
	Bad debt expense	398			44			3
	Write-offs, net of recoveries	(255		)	—			—
	Change in deferred interest on short-term and long-term installment receivables	62			67			10
	Deferred interest and allowance for credit losses, end of period	$	329		$	124		$	13

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Carrying Amounts and Estimated Fair Values of Current and Long-Term Debt	The following table presents carrying amounts and estimated fair values of current and long-term debt:
		Carrying amount at March 31, 2015		Estimated Fair Value Using Input Type
				Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
		(in millions)
	Current and long-term debt	$	33,434	$	27,238	$	4,906	$	1,410	$	33,554
		Carrying amount at March 31, 2014		Estimated Fair Value Using Input Type
				Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
		(in millions)
	Current and long-term debt	$	32,277	$	27,516	$	5,421	$	1,262	$	34,199

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	12 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	The following table presents the components of property, plant and equipment, and the related accumulated depreciation:
		March 31,
		2015			2014
		(in millions)
	Land	$	266		$	265
	Network equipment, site costs and related software	18,990			14,902
	Buildings and improvements	754			745
	Non-network internal use software, office equipment, leased devices and other	2,979			866
	Construction in progress	2,090			1,970
	Less: accumulated depreciation	(5,358		)	(2,449		)
	Property, plant and equipment, net	$	19,721		$	16,299
Minimum Estimated Payments to be Received for Leased Devices	As of March 31, 2015, the minimum estimated payments to be received for leased devices were as follows (in millions):
	Fiscal year 2015	$	740
	Fiscal year 2016	505
	Fiscal year 2017	1
	Fiscal year 2018 and thereafter	—
		$	1,246
Leased devices [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	The following table presents leased devices and the related accumulated depreciation:
		March 31,
		2015			2014
		(in millions)
	Leased devices	$	1,974		$	—
	Less: accumulated depreciation	(197		)	—
	Leased devices, net	$	1,777		$	—

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-Lived Intangible Assets	The following provides the activity of Indefinite-lived intangible assets within the consolidated balance sheets:
		March 31,				Net					March 31,
		2014				Additions					2015
		(in millions)
	FCC licenses	$	36,043			$	(91	)			$	35,952
	Trademarks	5,935				(1,900		)	(1	)	4,035
	Goodwill	6,383				192			(2	)	6,575
		$	48,361			$	(1,799	)			$	46,562
		December 31,				Net					March 31,
		2013				Additions					2014
		(in millions)
	FCC licenses	$	35,889			$	154				$	36,043
	Trademarks	5,935				—					5,935
	Goodwill	6,434				(51		)	(3	)	6,383
		$	48,258			$	103				$	48,361
	_________________
	-1	Net reduction to trademarks for the year ended March 31, 2015 of approximately $1.9 billion was related to the impairment of the Sprint trade name. See discussion below.
	-2	Net additions to goodwill for the Successor year ended March 31, 2015 of approximately $192 million were the result of purchase price allocation adjustments, which consisted of a $232 million increase recorded during the three-month period ended March 31, 2015 to correct the amount of net deferred tax liabilities recognized in connection with the SoftBank Merger and Clearwire Acquisition and a net $40 million decrease recorded during the three-months ended June 30, 2014, which is also associated with the SoftBank Merger and Clearwire Acquisition.
	-3	Net reduction to goodwill for the Successor three-month transition period ended March 31, 2014 of $51 million was the result of purchase price allocation adjustments associated with the SoftBank Merger.
Intangible Assets Subject to Amortization
				March 31, 2015												March 31, 2014
		Useful Lives		Gross				Accumulated				Net				Gross				Accumulated			Net
				Carrying				Amortization				Carrying				Carrying				Amortization			Carrying
				Value								Value				Value							Value
				(in millions)
	Customer relationships	4 to 8 years		$	6,923			$	(2,791	)		$	4,132			$	6,923			$	(1,289	)	$	5,634
	Other intangible assets:
	Favorable spectrum leases	23 years		884				(71		)		813				884				(30		)	854
	Favorable tower leases	3 to 7 years		589				(189		)		400				589				(80		)	509
	Trademarks	34 years		520				(27		)		493				520				(12		)	508
	Other	4 to 10 years		72				(17		)		55				60				(7		)	53
	Total other intangible assets			2,065				(304		)		1,761				2,053				(129		)	1,924
	Total definite-lived intangible assets			$	8,988			$	(3,095	)		$	5,893			$	8,976			$	(1,418	)	$	7,558
Intangible Assets Subject to Amortization, Future Amortization Expense
		Fiscal Year 2015				Fiscal Year 2016				Fiscal Year 2017				Fiscal Year 2018				Fiscal Year 2019
		(in millions)
	Estimated amortization expense	$	1,427			$	1,162			$	882			$	665			$	461

LongTerm_Debt_Financing_and_Ca1

Long-Term Debt, Financing and Capital Lease Obligations (Tables)	12 Months Ended
	Mar. 31, 2015
Long-term Debt and Capital Lease Obligations [Abstract]
Schedule of Long-term Debt Instruments
		Interest Rates			Maturities			March 31,			March 31,
								2015			2014
								(in millions)
	Notes
	Senior notes
	Sprint Corporation	7.13	-	7.88%	2021	-	2025	$	10,500		$	9,000
	Sprint Communications, Inc.	6	-	11.50%	2016	-	2022	9,280			9,280
	Sprint Capital Corporation	6.88	-	8.75%	2019	-	2032	6,204			6,204
	Guaranteed notes
	Sprint Communications, Inc.	7	-	9.00%	2018	-	2020	4,000			4,000
	Secured notes
	iPCS, Inc.	3.49%			2014			—			181
	Clearwire Communications LLC (1)	14.75%			2016			300			300
	Exchangeable notes
	Clearwire Communications LLC (1)	8.25%			2040			629			629
	Credit facilities
	Bank credit facility	3.31%			2018			—			—
	Export Development Canada (EDC)	3.5	-	4.08%	2015	-	2019	800			500
	Secured equipment credit facilities	1.85	-	2.20%	2017	-	2022	610			762
	Financing obligation	6.09%			2021			275			327
	Capital lease obligations and other	2.35	-	10.52%	2015	-	2023	127			187
	Net premiums							1,106			1,408
								33,831			32,778
	Less current portion							(1,300		)	(991		)
	Long-term debt, financing and capital lease obligations							$	32,531		$	31,787
Schedule of Maturities of Long-term Debt	Aggregate amount of maturities for long-term debt, financing obligation and capital lease obligations outstanding as of March 31, 2015, were as follows (in millions):
	Fiscal year 2015	$	1,300
	Fiscal year 2016	3,643
	Fiscal year 2017	1,379
	Fiscal year 2018	3,068
	Fiscal year 2019	3,094
	Fiscal year 2020 and thereafter	20,241
		32,725
	Net premiums	1,106
		$	33,831

Severance_and_Exit_Costs_Table

Severance and Exit Costs (Tables)	12 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Schedule of Severance and Exit Costs	The following provides the activity in the severance and exit costs liability included in "Accounts payable," "Accrued expenses and other current liabilities" and "Other liabilities" within the consolidated balance sheets:
		Successor
		March 31,				Net					Cash Payments				March 31,
		2014				Expense					and Other				2015
		(in millions)
	Lease exit costs	$	650			$	(28	)	(1)		$	(331	)		$	291
	Severance costs	197				253			(2)		(331		)		119
	Access exit costs	124				38			(3)		(118		)		44
		$	971			$	263				$	(780	)		$	454
	_________________
	-1	In addition to the $41 million gain (Wireless only) related to U.S. Cellular recognized, we recognized costs of $13 million ($12 million Wireless and $1 million Wireline) for the year ended March 31, 2015.
	-2	For the Successor year ended March 31, 2015, we recognized costs of $253 million ($218 million Wireless, $35 million Wireline).
	-3	For the Successor year ended March 31, 2015, we recognized costs of $38 million ($33 million Wireless, $5 million Wireline).
		Successor
		December 31,				Net					Cash Payments				March 31,
		2013				Expense					and Other				2014
		(in millions)
	Lease exit costs	$	764			$	11		(4)		$	(125	)		$	650
	Severance costs	225				14			(5)		(42		)		197
	Access exit costs	149				31			(6)		(56		)		124
		$	1,138			$	56				$	(223	)		$	971
	_________________
	-4	For the three-month transition period ended March 31, 2014, we recognized costs of $11 million (solely attributable to Wireless).
	-5	For the three-month transition period ended March 31, 2014, we recognized costs of $14 million ($12 million Wireless, $2 million Wireline).
	-6	For the three-month transition period ended March 31, 2014, $4 million (solely attributable to Wireline) was recognized as "Cost of services" and $27 million (solely attributable to Wireless) was recognized in "Severance and exit costs."
		Successor
		July 11,				Net					Cash Payments				December 31,
		2013				Expense					and Other				2013
		(in millions)
	Lease exit costs	$	933	(7)		$	56		(8)		$	(225	)		$	764
	Severance costs	54				219			(9)		(48		)		225
	Access exit costs	189				53			(10)		(93		)		149
		$	1,176			$	328				$	(366	)		$	1,138
	_________________
	-7	The July 11, 2013 opening balance takes into account purchase price adjustments as it relates to the SoftBank Merger.
	-8	For the year ended December 31, 2013, we recognized costs of $56 million ($54 million Wireless, $2 million Wireline).
	-9	For the year ended December 31, 2013, we recognized costs of $219 million ($191 million Wireless, $28 million Wireline).
	-10	For the year ended December 31, 2013, $19 million (solely attributable to Wireline) was recognized as "Cost of services" and $34 million (solely attributable to Wireless) was recognized in "Severance and exit costs."
		Predecessor
		December 31,			Purchase Price				Net					Cash Payments			July 10,
		2012			Adjustments				Expense					and Other			2013
		(in millions)
	Lease exit costs	$	190		$	131			$	478		(11)		$	(33	)	$	766
	Severance costs	11			—				58			(12)		(15		)	54
	Access exit costs	43			—				151			(13)		(5		)	189
		$	244		$	131			$	687				$	(53	)	$	1,009
	_________________
	-11	For the 191-day period ended July 10, 2013, we recognized net costs of $478 million (solely attributable to our Wireless segment). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $8 million (solely attributable to our Wireless segment).
	-12	For the 191-day period ended July 10, 2013, we recognized costs of $58 million ($55 million Wireless, and $3 million was Wireline). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $17 million ($14 million Wireless, and $3 million Wireline).
	-13	Of the $151 million ($133 million Wireless; $18 million Wireline) recognized for the 191-day period ended July 10, 2013, $35 million was recognized as "Cost of services" and $116 million was recognized in "Severance and exit costs." For the unaudited three-month period ended March 31, 2013, we recognized $7 million ($4 million Wireless; $3 million Wireline) all as "Cost of services."

Supplemental_Financial_Informa1

Supplemental Financial Information (Tables)	12 Months Ended
	Mar. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Schedule of Supplemental Balance Sheet Disclosures
		March 31,			March 31,
		2015			2014
		(in millions)
	Accounts and notes receivable, net
	Trade	$	1,037		$	3,271
	Unbilled trade and other	1,457			533
	Less allowances for doubtful accounts and deferred interest	(204		)	(197		)
		$	2,290		$	3,607
	Prepaid expenses and other current assets
	Prepaid expenses	$	401		$	451
	Due from Conduits for sold receivables	1,198			—
	Deferred charges and other	291			221
		$	1,890		$	672
	Other assets
	Unbilled trade installment receivables, net	361			317
	Investments	151			146
	Other	565			429
		$	1,077		$	892
	Accounts payable(1)
	Trade	$	3,786		$	2,492
	Accrued interconnection costs	198			316
	Capital expenditures and other	363			355
		$	4,347		$	3,163
	Accrued expenses and other current liabilities
	Deferred revenues	$	1,385		$	1,286
	Accrued taxes	238			306
	Payroll and related	589			290
	Severance, lease and other exit costs	223			555
	Accrued interest	525			515
	Accrued capital expenditures	705			1,247
	Other	1,628			1,345
		$	5,293		$	5,544
	Other liabilities
	Deferred rental income-communications towers	$	229		$	240
	Deferred rent	366			179
	Asset retirement obligations	584			651
	Unfavorable lease liabilities	856			1,068
	Post-retirement benefits and other non-current employee related liabilities	987			647
	Other	929			900
		$	3,951		$	3,685
	______________________
	-1	Includes liabilities in the amounts of $90 million and $91 million as of March 31, 2015 and 2014, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Income tax expense consists of the following:
		Successor																	Predecessor
		Year Ended			Three Months Ended						Year Ended				87 Days Ended December 31,				191 Days Ended July 10,			Three Months Ended			Year Ended
		March 31,			March 31,						December 31,											March 31,			December 31,
		2015			2014			2013 (Unaudited)			2013				2012				2013			2013 (Unaudited)			2012
					(in millions)
	Current income tax (expense) benefit
	Federal	$	5		$	—		$	(2	)	$	1			$	(3	)		$	2		$	(8	)	$	34
	State	(39		)	(10		)	—			(13		)		—				(17		)	(6		)	22
	Total current income tax (expense) benefit	(34		)	(10		)	(2		)	(12		)		(3		)		(15		)	(14		)	56
	Deferred income tax benefit
	(expense)
	Federal	491			(48		)	1			(46		)		(1		)		(1,402		)	(19		)	(199		)
	State	118			2			—			14				—				(184		)	(5		)	(10		)
	Total deferred income tax benefit (expense)	609			(46		)	1			(32		)		(1		)		(1,586		)	(24		)	(209		)
	Foreign income tax expense	(1		)	—						(1		)		—				—			—			(1		)
	Total income tax benefit (expense)	$	574		$	(56	)	$	(1	)	$	(45	)		$	(4	)		$	(1,601	)	$	(38	)	$	(154	)
Factors Causing Variation in Effective Tax Rate From US Federal Statutory Rate	The differences that caused our effective income tax rates to vary from the 35% U.S. federal statutory rate for income taxes were as follows:
		Successor																	Predecessor
		Year Ended			Three Months Ended						Year Ended				87 Days Ended December 31,				191 Days Ended July 10,			Three Months Ended			Year Ended
		March 31,			March 31,						December 31,											March 31,			December 31,
		2015			2014			2013 (Unaudited)			2013				2012				2013			2013 (Unaudited)			2012
					(in millions)
	Income tax benefit (expense) at the federal statutory rate	$	1,372		$	33		$	3		$	635			$	8			$	(155	)	$	212		$	1,460
	Effect of:
	State income taxes, net of federal income tax effect	124			(4		)	—			47				—				(18		)	16			137
	State law changes, net of federal income tax effect	4			5			—			10				—				—			—			(5		)
	Reduction (increase) in liability for unrecognized tax benefits	1			—			—			2				—				(7		)	—			38
	Change in valuation allowance	(911		)	(82		)	—			(708		)		(4		)		(1,410		)	(265		)	(1,756		)
	Other, net	(16		)	(8		)	(4		)	(31		)		(8		)		(11		)	(1		)	(28		)
	Income tax benefit (expense)	$	574		$	(56	)	$	(1	)	$	(45	)		$	(4	)		$	(1,601	)	$	(38	)	$	(154	)
	Effective income tax rate	14.6		%	(58.9		)%	(12.5		)%	(2.5		)%		(17.4		)%		361.4		%	(6.3		)%	(3.7		)%
Schedule of Income Tax Expense Benefit Allocated to Other Items	Income tax (expense) benefit allocated to other items was as follows:
		Successor										Predecessor
		Year Ended			Three Months Ended			Year Ended				191 Days Ended July 10,				Three Months Ended			Year Ended
		March 31,			March 31,			December 31,								March 31,			December 31,
		2015			2014			2013				2013				2013 (Unaudited)			2012
					(in millions)
	Unrecognized net periodic pension and other postretirement benefit cost(1)	$	—		$	—		$	(58	)		$	(18	)		$	(10	)	$	—
	Unrealized holding gains/losses on securities(1)	$	—		$	(1	)	$	(3	)		$	—			$	(1	)	$	—
	_______________
	-1	These amounts have been recognized in accumulated other comprehensive loss.
Schedule of Deferred Tax Assets and Liabilities	The sources of the differences that give rise to the deferred income tax assets and liabilities as of March 31, 2015 and 2014, along with the income tax effect of each, were as follows:
		Successor
		March 31, 2015						March 31, 2014
		Current			Long-Term			Current			Long-Term
		(in millions)
	Deferred tax assets
	Net operating loss carryforwards	$	—		$	8,155		$	—		$	7,264
	Tax credit carryforwards	—			381			—			374
	Capital loss carryforwards	—			84			—			82
	Property, plant and equipment	—			261			—			500
	Debt obligations	—			419			—			598
	Deferred rent	—			470			—			474
	Pension and other postretirement benefits	—			385			—			252
	Accruals and other liabilities	637			561			738			601
		637			10,716			738			10,145
	Valuation allowance	(509		)	(8,371		)	(522		)	(7,175		)
		128			2,345			216			2,970
	Deferred tax liabilities
	FCC licenses	—			12,558			—			12,158
	Trademarks	—			1,725			—			2,461
	Intangibles	—			1,658			—			2,248
	Other	66			302			88			310
		66			16,243			88			17,177
	Current deferred tax asset	$	62					$	128
	Long-term deferred tax liability				$	13,898					$	14,207
Summary of Income Tax Contingencies	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		Successor
		Year Ended			Three Months Ended
		March 31,			March 31,
		2015			2014
					(in  millions)
	Balance at beginning of period	$	160		$	166
	Additions based on current year tax positions	5			—
	Additions based on prior year tax positions	3			1
	Reductions for prior year tax positions	(3		)	(1		)
	Reductions for settlements	(1		)	—
	Reductions for lapse of statute of limitations	(1		)	(6		)
	Balance at end of period	$	163		$	160

Commitments_and_Contingencies_1

Commitments and Contingencies Commitments and Contingencies (Tables)	12 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Contractual Obligation by Maturity Year	As of March 31, 2015, the minimum estimated amounts due under operating leases, spectrum leases and service credits, and purchase orders and other commitments were as follows:
	Future Minimum Commitments	Total		Fiscal Year 2015		Fiscal Year 2016		Fiscal Year 2017		Fiscal Year 2018		Fiscal Year 2019		Fiscal Year
														2020 and thereafter
		(in millions)
	Operating leases	$	15,381	$	2,122	$	2,078	$	2,015	$	1,964	$	1,857	$	5,345
	Spectrum leases and service credits	6,725		194		204		212		214		218		5,683
	Purchase orders and other commitments	15,004		8,861		2,614		1,147		914		460		1,008
	Total	$	37,110	$	11,177	$	4,896	$	3,374	$	3,092	$	2,535	$	12,036

Stockholders_Equity_and_Per_Sh1

Stockholders' Equity and Per Share Data (Tables)	12 Months Ended
	Mar. 31, 2015
Shareholders' Equity and Per Share Data [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive loss, net of tax are as follows:
		March 31, 2015			March 31, 2014
		(in millions)
	Unrecognized net periodic pension and postretirement benefit cost	$	(388	)	$	(54	)
	Unrealized net gains related to investments	1			7
	Foreign currency translation adjustments	(21		)	4
	Accumulated other comprehensive loss	$	(408	)	$	(43	)

Segments_Tables

Segments (Tables)	12 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Statement of Operations Information	inancial information is as follows:
	Successor
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Year Ended March 31, 2015
	Net operating revenues	$	32,327		$	2,191		$	14		$	34,532
	Inter-segment revenues(1)	—			623			(623		)	—
	Total segment operating expenses	(26,433		)	(2,701		)	602			(28,532		)
	Segment earnings	$	5,894		$	113		$	(7	)	6,000
	Less:
	Depreciation										(3,797		)
	Amortization										(1,552		)
	Impairments(2)										(2,133		)
	Other, net(3)										(413		)
	Operating loss										(1,895		)
	Interest expense										(2,051		)
	Other income, net										27
	Loss before income taxes										$	(3,919	)
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Three Months Ended March 31, 2014
	Net operating revenues	$	8,254		$	617		$	4		$	8,875
	Inter-segment revenues(1)	—			153			(153		)	—
	Total segment operating expenses	(6,417		)	(758		)	144			(7,031		)
	Segment earnings	$	1,837		$	12		$	(5	)	1,844
	Less:
	Depreciation										(868		)
	Amortization										(429		)
	Impairments(2)										(75		)
	Other, net(3)										(52		)
	Operating income										420
	Interest expense										(516		)
	Other income, net										1
	Loss before income taxes										$	(95	)
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Three Months Ended March 31, 2013 (unaudited)
	Net operating revenues	$	—		$	—		$	—		$	—
	Inter-segment revenues(1)	—			—			—			—
	Total segment operating expenses	—			—			(14		)	(14		)
	Segment earnings	$	—		$	—		$	(14	)	(14		)
	Other income, net										6
	Loss before income taxes										$	(8	)
	Successor
	Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations
		(in millions)
	Year Ended December 31, 2013
	Net operating revenues	$	15,642		$	1,240		$	9		$	16,891
	Inter-segment revenues(1)	—			396			(396		)	—
	Total segment operating expenses	(13,464		)	(1,414		)	353			(14,525		)
	Segment earnings	$	2,178		$	222		$	(34	)	2,366
	Less:
	Depreciation										(2,026		)
	Amortization										(908		)
	Other, net(3)										(402		)
	Operating loss										(970		)
Interest expense										(918		)
Other income, net										73
Loss before income taxes										$	(1,815	)
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
87 days Ended December 31, 2012
Net operating revenues	$	—		$	—		$	—		$	—
Inter-segment revenues(1)	—			—			—			—
Total segment operating expenses	—			—			(33		)	(33		)
Segment earnings	$	—		$	—		$	(33	)	(33		)
Other income, net										10
Loss before income taxes										$	(23	)
Other Information	Wireless			Wireline			Corporate and			Consolidated
							Other
	(in millions)
As of and for the year ended March 31, 2015
Capital expenditures	$	5,442		$	275		$	287		$	6,004
Total assets	$	75,581		$	1,261		$	6,188		$	83,030
As of and for the three months ended March 31, 2014
Capital expenditures	$	1,343		$	79		$	66		$	1,488
Total assets	$	75,051		$	1,499		$	8,139		$	84,689
As of March 31, 2013
Total assets	$	—		$	—		$	3,122		$	3,122
As of and for the year ended December 31, 2013
Capital expenditures	$	3,535		$	153		$	159		$	3,847
Total assets	$	75,128		$	1,548		$	9,419		$	86,095
As of December 31, 2012
Total assets	$	—		$	—		$	3,115		$	3,115
Predecessor
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
191 Days Ended July 10, 2013
Net operating revenues	$	17,125		$	1,471		$	6		$	18,602
Inter-segment revenues(1)	—			430			(430		)	—
Total segment operating expenses	(14,355		)	(1,629		)	425			(15,559		)
Segment earnings	$	2,770		$	272		$	1		3,043
Less:
Depreciation										(3,098		)
Amortization										(147		)
Other, net(3)										(683		)
Operating loss										(885		)
Interest expense										(1,135		)
Equity in losses of unconsolidated investments, net							$	(482	)
Gain on previously-held equity interests							2,926			2,444
Other income, net										19
Income before income taxes										$	443
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
Three Months Ended March 31, 2013 (unaudited)
Net operating revenues	$	8,089		$	702		$	2		$	8,793
Inter-segment revenues(1)	—			191			(191		)	—
Total segment operating expenses	(6,694		)	(765		)	190			(7,269		)
Segment earnings	$	1,395		$	128		$	1		1,524
Less:
Depreciation										(1,422		)
Amortization										(70		)
Other, net(3)										(3		)
Operating income										29
Interest expense										(432		)
Equity in losses of unconsolidated investments, net							$	(202	)	(202		)
Loss before income taxes										$	(605	)
Predecessor
Statement of Operations Information	Wireless			Wireline			Corporate,			Consolidated
							Other and
							Eliminations
	(in millions)
Year Ended December 31, 2012
Net operating revenues	$	32,355		$	2,999		$	12		$	35,366
Inter-segment revenues(1)	—			882			(882		)	—
Total segment operating expenses	(28,208		)	(3,232		)	877			(30,563		)
Segment earnings	$	4,147		$	649		$	7		4,803
Less:
Depreciation										(6,240		)
Amortization										(303		)
Business combination and hurricane-related charges(4)										(64		)
Impairments(2)										(102		)
Other, net(3)										86
Operating loss										(1,820		)
Interest expense										(1,428		)
Equity in losses of unconsolidated investments, net							$	(1,114	)	(1,114		)
Other income, net										190
Loss before income taxes										$	(4,172	)
Other Information	Wireless			Wireline			Corporate and			Consolidated
							Other
	(in millions)
Capital expenditures for the 191 days ended July 10, 2013	$	2,840		$	174		$	126		$	3,140
Capital expenditures for the three months ended March 31, 2013 (unaudited)	$	1,270		$	64		$	47		$	1,381
As of and for the year ended December 31, 2012
Capital expenditures	$	3,753		$	240		$	268		$	4,261
Total assets	$	38,297		$	2,195		$	11,078		$	51,570
_________________
-1	Inter-segment revenues consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.
-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.
-3	Other, net for the Successor year ended March 31, 2015 consists of $304 million of severance and exit costs, combined with $91 million for legal reserves related to various pending legal suits and proceedings and $59 million for a partial pension settlement, partially offset by a $41 million release of liability reserves associated with the May 2013 U.S. Cellular asset acquisition. Other, net for the Successor three-month transition period ended March 31, 2014 consists of $52 million of severance and exit costs. 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 and unaudited three-month period ended March 31, 2013 consists of $652 million and $25 million, respectively, of severance and exit costs, partially offset by $22 million of favorable developments in connection with an E911 regulatory tax-related contingency. Other, net for the Predecessor 191-day period ended July 10, 2013 also includes $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). Other, net for the Predecessor year ended December 31, 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 $196 million of lease exit costs.
-4	Includes $45 million of hurricane-related charges for the Predecessor year ended December 31, 2012, which are classified in our consolidated statements of operations as follows: $21 million as contra-revenue in net operating revenues of Wireless, $20 million as cost of services ($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.
Operating Revenues by Service and Products
	Predecessor
	Operating Revenues by Service and Products	Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations(1)
		(in millions)
	191 Days Ended July 10, 2013
	Wireless services	$	15,139		$	—		$	—		$	15,139
	Wireless equipment	1,707			—			—			1,707
	Voice	—			771			(236		)	535
	Data	—			188			(93		)	95
	Internet	—			913			(100		)	813
	Other	279			29			5			313
	Total net operating revenues	$	17,125		$	1,901		$	(424	)	$	18,602
		Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations(1)
		(in millions)
	Three Months Ended March 31, 2013 (unaudited)
	Wireless services	$	7,143		$	—		$	—		$	7,143
	Wireless equipment	813			—			—			813
	Voice	—			352			(99		)	253
	Data	—			94			(46		)	48
	Internet	—			434			(47		)	387
	Other	133			13			3			149
	Total net operating revenues	$	8,089		$	893		$	(189	)	$	8,793
		Wireless			Wireline			Corporate,			Consolidated
								Other and
								Eliminations(1)
		(in millions)
	Year Ended December 31, 2012
	Wireless services(2)	$	28,624		$	—		$	—		$	28,624
	Wireless equipment	3,248			—			—			3,248
	Voice	—			1,627			(515		)	1,112
	Data	—			398			(176		)	222
	Internet	—			1,781			(190		)	1,591
	Other	483			75			11			569
	Total net operating revenues	$	32,355		$	3,881		$	(870	)	$	35,366

Quarterly_Financial_Data_Unaud1

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Mar. 31, 2015
Selected Quarterly Financial Information [Abstract]
Schedule of Quarterly Financial Information
		Successor
		Quarter
		1st			2nd			3rd			4th
		(in millions, except per share amounts)
	Fiscal year 2014
	Net operating revenues	$	8,789		$	8,488		$	8,973		$	8,292
	Operating income (loss)	$	519		$	(192	)	$	(2,540	)	$	318
	Net income (loss)	$	23		$	(765	)	$	(2,379	)	$	(224	)
	Basic and diluted income (loss) per common share(1)	$	0.01		$	(0.19	)	$	(0.60	)	$	(0.06	)
	Calendar year 2013
	Net operating revenues	$	—		$	—		$	7,749		$	9,142
	Operating loss	$	(14	)	$	(22	)	$	(358	)	$	(576	)
	Net loss	$	(9	)	$	(114	)	$	(699	)	$	(1,038	)
	Basic and diluted loss per common share(1)	$	—		$	—		$	(0.18	)	$	(0.26	)
		Predecessor
		Quarter
		1st			2nd			10-Jul-13
		(in millions, except per share amounts)
	Calendar year 2013
	Net operating revenues	$	8,793		$	8,877		$	932
	Operating income (loss)	$	29		$	(874	)	$	(40	)
	Net (loss) income	$	(643	)	$	(1,597	)	$	1,082
	Basic (loss) income per common share(1)	$	(0.21	)	$	(0.53	)	$	0.35
	Diluted (loss) income per common share(1)	$	(0.21	)	$	(0.53	)	$	0.3
	_____________
	-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.

Related_Party_Transactions_Rel

Related Party Transactions Related Party Transactions (Tables)	12 Months Ended
	Mar. 31, 2015
Related Party Transaction [Line Items]
Investee Summarized Income Statement Information	Summarized financial information for Clearwire for the 190-day period ended July 9, 2013, which preceded the Clearwire Acquisition, is as follows:
		190 Days Ended July 9,			Year Ended December 31,
		2013			2012
		(in millions)
	Revenues	$	666		$	1,265
	Operating expenses	(1,285		)	(2,644		)
	Operating loss	$	(619	)	$	(1,379	)
	Net loss from continuing operations before non-controlling interests	$	(1,102	)	$	(1,744	)
	Net loss from discontinued operations before non-controlling interests	$	—		$	(168	)
Brightstar [Member]
Related Party Transaction [Line Items]
Schedule of Related Party Transactions	Amounts included in our consolidated financial statements associated with our arrangements with Brightstar were as follows:
	Consolidated balance sheets:	March 31,			March 31,
		2015			2014
		(in millions)
	Accounts receivable	$	430		$	—
	Accounts payable	$	96		$	—
	Consolidated statements of operations:	March 31,
		2015
		(in millions)
	Net operating revenues (1)	$	1,818
	Cost of products (1)	$	1,887
	_________________
	-1	Amounts for all other reported periods were immaterial.
Brightstar Subsidiary [Member]
Related Party Transaction [Line Items]
Schedule of Related Party Transactions	Amounts included in our consolidated balance sheets associated with these arrangements with the Brightstar Subsidiary were as follows:
		March 31,			March 31,
		2015			2014
		(in millions)
	Device and accessory inventory	$	410		$	266
	Accounts payable	$	16		$	205

Guarantor_Financial_Informatio1

Guarantor Financial Information (Tables)	12 Months Ended
	Mar. 31, 2015
Condensed Balance Sheet Statements, Captions [Line Items]
Condensed Consolidating Balance Sheet	CONDENSED CONSOLIDATING BALANCE SHEET
		As of March 31, 2015
		Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
		(in millions)
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—		$	3,492		$	518		$	—		$	4,010
	Short-term investments	—			146			20			—			166
	Accounts and notes receivable, net	84			157			2,160			(111		)	2,290
	Device and accessory inventory	—			—			1,359			—			1,359
	Deferred tax assets	—			—			62			—			62
	Prepaid expenses and other current assets	—			13			1,877			—			1,890
	Total current assets	84			3,808			5,996			(111		)	9,777
	Investments in subsidiaries	21,712			22,413			—			(44,125		)	—
	Property, plant and equipment, net	—			—			19,721			—			19,721
	Due from consolidated affiliate	68			20,934			—			(21,002		)	—
	Note receivable from consolidated affiliate	10,500			458			—			(10,958		)	—
	Intangible assets
	Goodwill	—			—			6,575			—			6,575
	FCC licenses and other	—			—			39,987			—			39,987
	Definite-lived intangible assets, net	—			—			5,893			—			5,893
	Other assets	139			1,260			836			(1,158		)	1,077
	Total assets	$	32,503		$	48,873		$	79,008		$	(77,354	)	$	83,030
	LIABILITIES AND STOCKHOLDERS' EQUITY
	Current liabilities:
	Accounts payable	$	—		$	—		$	4,347		$	—		$	4,347
	Accrued expenses and other current liabilities	154			625			4,625			(111		)	5,293
	Current portion of long-term debt, financing and capital lease obligations	—			500			800			—			1,300
	Total current liabilities	154			1,125			9,772			(111		)	10,940
	Long-term debt, financing and capital lease obligations	10,500			14,576			8,474			(1,019		)	32,531
	Deferred tax liabilities	—			—			13,898			—			13,898
	Note payable due to consolidated affiliate	—			10,500			458			(10,958		)	—
	Other liabilities	—			960			2,991			—			3,951
	Due to consolidated affiliate	139			—			21,002			(21,141		)	—
	Total liabilities	10,793			27,161			56,595			(33,229		)	61,320
	Commitments and contingencies
	Total stockholders' equity	21,710			21,712			22,413			(44,125		)	21,710
	Total liabilities and stockholders' equity	$	32,503		$	48,873		$	79,008		$	(77,354	)	$	83,030
	CONDENSED CONSOLIDATING BALANCE SHEET
		As of March 31, 2014
		Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
		(in millions)
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—		$	4,125		$	845		$	—		$	4,970
	Short-term investments	—			1,220			—			—			1,220
	Accounts and notes receivable, net	74			27			3,607			(101		)	3,607
	Device and accessory inventory	—			—			982			—			982
	Deferred tax assets	—			—			128			—			128
	Prepaid expenses and other current assets	—			14			658			—			672
	Total current assets	74			5,386			6,220			(101		)	11,579
	Investments in subsidiaries	25,316			25,588			—			(50,904		)	—
	Property, plant and equipment, net	—			—			16,299			—			16,299
	Due from consolidated affiliate	—			18,234			—			(18,234		)	—
	Note receivable from consolidated affiliate	9,000			—			—			(9,000		)	—
	Intangible assets
	Goodwill	—			—			6,383			—			6,383
	FCC licenses and other	—			—			41,978			—			41,978
	Definite-lived intangible assets, net	—			—			7,558			—			7,558
	Other assets	133			1,237			674			(1,152		)	892
	Total assets	$	34,523		$	50,445		$	79,112		$	(79,391	)	$	84,689
	LIABILITIES AND STOCKHOLDERS' EQUITY
	Current liabilities:
	Accounts payable	$	—		$	—		$	3,163		$	—		$	3,163
Accrued expenses and other current liabilities	78			493			5,074			(101		)	5,544
Current portion of long-term debt, financing and capital lease obligations	—			—			991			—			991
Total current liabilities	78			493			9,228			(101		)	9,698
Long-term debt, financing and capital lease obligations	9,000			15,027			8,779			(1,019		)	31,787
Deferred tax liabilities	—			—			14,207			—			14,207
Note payable due to consolidated affiliate	—			9,000			—			(9,000		)	—
Other liabilities	—			609			3,076			—			3,685
Due to consolidated affiliate	133			—			18,234			(18,367		)	—
Total liabilities	9,211			25,129			53,524			(28,487		)	59,377
Commitments and contingencies
Total stockholders' equity	25,312			25,316			25,588			(50,904		)	25,312
Total liabilities and stockholders' equity	$	34,523		$	50,445		$	79,112		$	(79,391	)	$	84,689
Condensed Consolidating Income Statement	CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
	Successor
		Year Ended March 31, 2015
		Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
		(in millions)
	Net operating revenues:
	Service	$	—		$	—		$	29,542		$	—		$	29,542
	Equipment	—			—			4,990			—			4,990
		—			—			34,532			—			34,532
	Net operating expenses:
	Cost of services (exclusive of depreciation and amortization below)	—			—			9,660			—			9,660
	Cost of products (exclusive of depreciation and amortization below)	—			—			9,309			—			9,309
	Selling, general and administrative	—			—			9,563			—			9,563
	Impairments	—			—			2,133			—			2,133
	Severance and exit costs	—			—			304			—			304
	Depreciation	—			—			3,797			—			3,797
	Amortization	—			—			1,552			—			1,552
	Other, net	—			1			108			—			109
		—			1			36,426			—			36,427
	Operating loss	—			(1		)	(1,894		)	—			(1,895		)
	Other income (expense):
	Interest income	687			146			3			(824		)	12
	Interest expense	(687		)	(1,521		)	(667		)	824			(2,051		)
	Equity in losses of unconsolidated investments, net	—			—			—			—			—
	Gain on previously-held equity interests	—			—			—			—			—
	(Losses) earnings of subsidiaries	(3,345		)	(1,970		)	—			5,315			—
	Other income, net	—			1			14			—			15
		(3,345		)	(3,344		)	(650		)	5,315			(2,024		)
	(Loss) income before income taxes	(3,345		)	(3,345		)	(2,544		)	5,315			(3,919		)
	Income tax benefit	—			—			574			—			574
	Net (loss) income	(3,345		)	(3,345		)	(1,970		)	5,315			(3,345		)
	Other comprehensive (loss) income	(365		)	(365		)	(355		)	720			(365		)
	Comprehensive (loss) income	$	(3,710	)	$	(3,710	)	$	(2,325	)	$	6,035		$	(3,710	)
	CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
	Successor
		Three Months Ended March 31, 2014
		Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
		(in millions)
	Net operating revenues:
	Service	$	—		$	—		$	7,876		$	—		$	7,876
	Equipment	—			—			999			—			999
		—			—			8,875			—			8,875
	Net operating expenses:
	Cost of services (exclusive of depreciation and amortization below)	—			—			2,622			—			2,622
	Cost of products (exclusive of depreciation and amortization below)	—			—			2,038			—			2,038
	Selling, general and administrative	—			—			2,371			—			2,371
	Impairments	—			—			75			—			75
	Severance and exit costs	—			—			52			—			52
	Depreciation	—			—			868			—			868
	Amortization	—			—			429			—			429
		—			—			8,455			—			8,455
	Operating income	—			—			420			—			420
	Other income (expense):
	Interest income	169			20			4			(189		)	4
	Interest expense	(166		)	(373		)	(166		)	189			(516		)
	(Losses) earnings of subsidiaries	(154		)	199			—			(45		)	—
	Other expense, net	—			—			(3		)	—			(3		)
		(151		)	(154		)	(165		)	(45		)	(515		)
	(Loss) income before income taxes	(151		)	(154		)	255			(45		)	(95		)
	Income tax expense	—			—			(56		)	—			(56		)
	Net (loss) income	(151		)	(154		)	199			(45		)	(151		)
	Other comprehensive (loss) income	(145		)	(145		)	(147		)	292			(145		)
	Comprehensive (loss) income	$	(296	)	$	(299	)	$	52		$	247		$	(296	)
	CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Successor
	Year Ended December 31, 2013
	Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	—		$	15,094		$	—		$	15,094
Equipment	—			—			1,797			—			1,797
	—			—			16,891			—			16,891
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			—			5,174			—			5,174
Cost of products (exclusive of depreciation and amortization below)	—			—			4,603			—			4,603
Selling, general and administrative	36			—			4,805			—			4,841
Severance and exit costs	—			—			309			—			309
Depreciation	—			—			2,026			—			2,026
Amortization	—			—			908			—			908
	36			—			17,825			—			17,861
Operating loss	(36		)	—			(934		)	—			(970		)
Other income (expense):
Interest income	189			40			6			(200		)	35
Interest expense	(163		)	(548		)	(407		)	200			(918		)
(Losses) earnings of subsidiaries	(1,831		)	(1,320		)	—			3,151			—
Other (expense) income, net	(15		)	(3		)	56			—			38
	(1,820		)	(1,831		)	(345		)	3,151			(845		)
(Loss) income before income taxes	(1,856		)	(1,831		)	(1,279		)	3,151			(1,815		)
Income tax expense	(4		)	—			(41		)	—			(45		)
Net (loss) income	(1,860		)	(1,831		)	(1,320		)	3,151			(1,860		)
Other comprehensive income (loss)	102			102			93			(195		)	102
Comprehensive (loss) income	$	(1,758	)	$	(1,729	)	$	(1,227	)	$	2,956		$	(1,758	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Predecessor
	For the 191 Days Ended July 10, 2013
	Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	16,895		$	—		$	16,895
Equipment	—			1,707			—			1,707
	—			18,602			—			18,602
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			5,673			—			5,673
Cost of products (exclusive of depreciation and amortization below)	—			4,872			—			4,872
Selling, general and administrative	—			5,067			—			5,067
Severance and exit costs	—			652			—			652
Depreciation	—			3,098			—			3,098
Amortization	—			147			—			147
Other, net	—			(22		)	—			(22		)
	—			19,487			—			19,487
Operating loss	—			(885		)	—			(885		)
Other income (expense):
Interest income	61			15			(43		)	33
Interest expense	(842		)	(336		)	43			(1,135		)
Equity in losses of unconsolidated investments, net	—			(482		)	—			(482		)
Gain on previously-held equity interests	—			2,926			—			2,926
(Losses) earnings of subsidiaries	(365		)	—			365			—
Other expense, net	(12		)	(2		)	—			(14		)
	(1,158		)	2,121			365			1,328
(Loss) income before income taxes	(1,158		)	1,236			365			443
Income tax expense	—			(1,601		)	—			(1,601		)
Net (loss) income	(1,158		)	(365		)	365			(1,158		)
Other comprehensive income (loss)	23			35			(35		)	23
Comprehensive (loss) income	$	(1,135	)	$	(330	)	$	330		$	(1,135	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Predecessor
	Three Months Ended March 31, 2013 (Unaudited)
	Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	7,980		$	—		$	7,980
Equipment	—			813			—			813
	—			8,793			—			8,793
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			2,640			—			2,640
Cost of products (exclusive of depreciation and amortization below)	—			2,293			—			2,293
Selling, general and administrative	—			2,336			—			2,336
Severance and exit costs	—			25			—			25
Depreciation	—			1,422			—			1,422
Amortization	—			70			—			70
Other, net	—			(22		)	—			(22		)
	—			8,764			—			8,764
Operating income	—			29			—			29
Other income (expense):
Interest income	29			6			(21		)	14
Interest expense	(292		)	(161		)	21			(432		)
Equity in losses of unconsolidated investments, net	—			(202		)	—			(202		)
(Losses) earnings of subsidiaries	(368		)	—			368			—
Other expense, net	(12		)	(2		)	—			(14		)
	(643		)	(359		)	368			(634		)
(Loss) income before income taxes	(643		)	(330		)	368			(605		)
Income tax expense	—			(38		)	—			(38		)
Net (loss) income	(643		)	(368		)	368			(643		)
Other comprehensive income (loss)	14			15			(15		)	14
Comprehensive (loss) income	$	(629	)	$	(353	)	$	353		$	(629	)
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE LOSS
Predecessor
	Year Ended December 31, 2012
	Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(in millions)
Net operating revenues:
Service	$	—		$	32,097		$	—		$	32,097
Equipment	—			3,248			—			3,248
	—			35,345			—			35,345
Net operating expenses:
Cost of services (exclusive of depreciation and amortization below)	—			10,936			—			10,936
Cost of products (exclusive of depreciation and amortization below)	—			9,905			—			9,905
Selling, general and administrative	—			9,765			—			9,765
Impairments	—			102			—			102
Severance and exit costs	—			196			—			196
Depreciation	—			6,240			—			6,240
Amortization	—			303			—			303
Other, net	—			(282		)	—			(282		)
	—			37,165			—			37,165
Operating loss	—			(1,820		)	—			(1,820		)
Other income (expense):
Interest income	112			34			(81		)	65
Interest expense	(907		)	(602		)	81			(1,428		)
Equity in losses of unconsolidated investments, net	—			(1,114		)	—			(1,114		)
(Losses) earnings of subsidiaries	(3,530		)	—			3,530			—
Other (expense) income, net	(1		)	126			—			125
	(4,326		)	(1,556		)	3,530			(2,352		)
(Loss) income before income taxes	(4,326		)	(3,376		)	3,530			(4,172		)
Income tax expense	—			(154		)	—			(154		)
Net (loss) income	(4,326		)	(3,530		)	3,530			(4,326		)
Other comprehensive (loss) income	(341		)	(339		)	339			(341		)
Comprehensive (loss) income	$	(4,667	)	$	(3,869	)	$	3,869		$	(4,667	)
Condensed Consolidating Cash Flow Statement	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	Successor
		Year Ended March 31, 2015
		Parent/Issuer			Subsidiary Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
		(in millions)
	Cash flows from operating activities:
	Net cash (used in) provided by operating activities	$	—		$	(750	)	$	3,700		$	(500	)	$	2,450
	Cash flows from investing activities:
	Capital expenditures - network and other	—			—			(5,422		)	—			(5,422		)
	Capital expenditures - leased devices	—			—			(582		)	—			(582		)
	Expenditures relating to FCC licenses	—			—			(163		)	—			(163		)
	Reimbursements relating to FCC licenses	—			—			95			—			95
	Proceeds from sales and maturities of short-term investments	—			3,061			70			—			3,131
	Purchases of short-term investments	—			(1,987		)	(90		)	—			(2,077		)
	Change in amounts due from/due to consolidated affiliates	—			(2,425		)	—			2,425			—
	Proceeds from sales of assets and FCC licenses	—			—			315			—			315
	Intercompany note advance to consolidated affiliate	(1,481		)	(343		)	—			1,824			—
	Other, net	—			—			(11		)	—			(11		)
	Net cash (used in) provided by investing activities	(1,481		)	(1,694		)	(5,788		)	4,249			(4,714		)
	Cash flows from financing activities:
	Proceeds from debt and financings	1,500			300			130			—			1,930
	Repayments of debt, financing and capital lease obligations	—			—			(574		)	—			(574		)
	Debt financing costs	(21		)	(5		)	(61		)	—			(87		)
	Proceeds from issuance of common stock, net	—			35			—			—			35
	Intercompany dividends paid to consolidated affiliate	—			—			(500		)	500			—
	Change in amounts due from/due to consolidated affiliates	2			—			2,423			(2,425		)	—
	Intercompany note advance from parent	—			1,481			343			(1,824		)	—
	Net cash provided by (used in) financing activities	1,481			1,811			1,761			(3,749		)	1,304
	Net decrease in cash and cash equivalents	—			(633		)	(327		)	—			(960		)
	Cash and cash equivalents, beginning of period	—			4,125			845			—			4,970
	Cash and cash equivalents, end of period	$	—		$	3,492		$	518		$	—		$	4,010
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	Successor
		Three Months Ended March 31, 2014
		Parent/Issuer			Subsidiary Guarantor			Non-			Eliminations			Consolidated
								Guarantor Subsidiaries
		(in millions)
	Cash flows from operating activities:
	Net cash provided by (used in) operating activities	$	—		$	(483	)	$	1,005		$	—		$	522
	Cash flows from investing activities:
	Capital expenditures	—			—			(1,488		)	—			(1,488		)
	Expenditures relating to FCC licenses	—			—			(152		)	—			(152		)
	Proceeds from sales and maturities of short-term investments	—			920			—			—			920
	Purchases of short-term investments	—			(1,035		)	—			—			(1,035		)
	Change in amounts due from/due to consolidated affiliates	—			(941		)	—			941			—
	Proceeds from sales of assets and FCC licenses	—			—			1			—			1
	Other, net	—			—			(2		)	—			(2		)
	Net cash (used in) provided by investing activities	—			(1,056		)	(1,641		)	941			(1,756		)
	Cash flows from financing activities:
	Repayments of debt and capital lease obligations	—			—			(159		)	—			(159		)
	Debt financing costs	—			(1		)	—			—			(1		)
	Change in amounts due from/due to consolidated affiliates	—			—			941			(941		)	—
	Net cash provided by (used in) financing activities	—			(1		)	782			(941		)	(160		)
	Net (decrease) increase in cash and cash equivalents	—			(1,540		)	146			—			(1,394		)
	Cash and cash equivalents, beginning of period	—			5,665			699			—			6,364
	Cash and cash equivalents, end of period	$	—		$	4,125		$	845		$	—		$	4,970
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	Successor
		Year Ended December 31, 2013
		Parent/Issuer			Subsidiary Guarantor			Non-			Eliminations			Consolidated
								Guarantor Subsidiaries
		(in millions)
	Cash flows from operating activities:
	Net cash provided by (used in) operating activities	$	9		$	(458	)	$	388		$	—		$	(61	)
Cash flows from investing activities:
Capital expenditures	—			—			(3,847		)	—			(3,847		)
Expenditures relating to FCC licenses	—			—			(146		)	—			(146		)
Acquisitions, net of cash acquired	(16,640		)	2,528			—			—			(14,112		)
Proceeds from sales and maturities of short-term investments	—			1,715			—			—			1,715
Purchases of short-term investments	—			(1,719		)	—			—			(1,719		)
Change in amounts due from/due to consolidated affiliates	—			(7,189		)	—			7,189			—
Proceeds from sales of assets and FCC licenses	—			—			7			—			7
Investment in consolidated affiliate	(1,900		)	—			—			1,900			—
Intercompany note advance to consolidated affiliate	(8,861		)	—			—			8,861			—
Other, net	—			—			(6		)	—			(6		)
Net cash (used in) provided by investing activities	(27,401		)	(4,665		)	(3,992		)	17,950			(18,108		)
Cash flows from financing activities:
Proceeds from debt and financings	9,000			—			500			—			9,500
Repayments of debt and capital lease obligations	—			—			(3,378		)	—			(3,378		)
Debt financing costs	(139		)	—			(8		)	—			(147		)
Proceeds from issuance of common stock, net	18,540			27			—			—			18,567
Change in amounts due from/due to consolidated affiliates	—			—			7,189			(7,189		)	—
Intercompany note advance from parent	—			8,861			—			(8,861		)	—
Equity contribution from parent	—			1,900			—			(1,900		)	—
Other, net	(14		)	—			—			—			(14		)
Net cash provided by (used in) financing activities	27,387			10,788			4,303			(17,950		)	24,528
Net (decrease) increase in cash and cash equivalents	(5		)	5,665			699			—			6,359
Cash and cash equivalents, beginning of period	5			—			—			—			5
Cash and cash equivalents, end of period	$	—		$	5,665		$	699		$	—		$	6,364
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Predecessor
	For the 191 Days Ended July 10, 2013
	Subsidiary Guarantor			Non-			Eliminations			Consolidated
				Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$	(559	)	$	3,230		$	—		$	2,671
Cash flows from investing activities:
Capital expenditures	—			(3,140		)	—			(3,140		)
Expenditures relating to FCC licenses	—			(125		)	—			(125		)
Acquisitions, net of cash acquired	(4,039		)	—			—			(4,039		)
Investment in Clearwire (including debt securities)	—			(308		)	—			(308		)
Proceeds from sales and maturities of short-term investments	2,445			—			—			2,445
Purchases of short-term investments	(1,221		)	—			—			(1,221		)
Change in amounts due from/due to consolidated affiliates	(372		)	—			372			—
Proceeds from sales of assets and FCC licenses	—			10			—			10
Other, net	—			(7		)	—			(7		)
Net cash (used in) provided by investing activities	(3,187		)	(3,570		)	372			(6,385		)
Cash flows from financing activities:
Proceeds from debt and financings	—			204			—			204
Repayments of debt and capital lease obligations	—			(362		)	—			(362		)
Debt financing costs	(11		)	—			—			(11		)
Proceeds from issuance of common stock, net	60			—			—			60
Change in amounts due from/due to consolidated affiliates	—			372			(372		)	—
Net cash provided by (used in) financing activities	49			214			(372		)	(109		)
Net decrease in cash and cash equivalents	(3,697		)	(126		)	—			(3,823		)
Cash and cash equivalents, beginning of period	5,218			1,133			—			6,351
Cash and cash equivalents, end of period	$	1,521		$	1,007		$	—		$	2,528
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Predecessor
	Three Months Ended March 31, 2013 (Unaudited)
	Subsidiary Guarantor			Non-			Eliminations			Consolidated
				Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$	(210	)	$	1,150		$	—		$	940
Cash flows from investing activities:
Capital expenditures	—			(1,381		)	—			(1,381		)
Expenditures relating to FCC licenses	—			(55		)	—			(55		)
Investment in Clearwire (including debt securities)	—			(80		)	—			(80		)
Proceeds from sales and maturities of short-term investments	1,281			—			—			1,281
Purchases of short-term investments	(926		)	—			—			(926		)
Change in amounts due from/due to consolidated affiliates	(236		)	—			236			—
Proceeds from sales of assets and FCC licenses	—			6			—			6
Other, net	—			(3		)	—			(3		)
Net cash provided by (used in) investing activities	119			(1,513		)	236			(1,158		)
Cash flows from financing activities:
Proceeds from debt and financings	—			204			—			204
Repayments of debt and capital lease obligations	—			(59		)	—			(59		)
Debt financing costs	(10		)	—			—			(10		)
Proceeds from issuance of common stock, net	7			—			—			7
Change in amounts due from/due to consolidated affiliates	—			236			(236		)	—
Net cash provided by (used in) financing activities	(3		)	381			(236		)	142
Net (decrease) increase in cash and cash equivalents	(94		)	18			—			(76		)
Cash and cash equivalents, beginning of period	5,218			1,133			—			6,351
Cash and cash equivalents, end of period	$	5,124		$	1,151		$	—		$	6,275
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
Predecessor
	Year Ended December 31, 2012
	Subsidiary Guarantor			Non-			Eliminations			Consolidated
				Guarantor Subsidiaries
	(in millions)
Cash flows from operating activities:
Net cash (used in) provided by operating activities	$	(728	)	$	3,727		$	—		$	2,999
Cash flows from investing activities:
Capital expenditures	—			(4,261		)	—			(4,261		)
Expenditures relating to FCC licenses	—			(198		)	—			(198		)
Investment in Clearwire (including debt securities)	—			(228		)	—			(228		)
Proceeds from sales and maturities of short-term investments	1,513			—			—			1,513
Purchases of short-term investments	(3,212		)	—			—			(3,212		)
Change in amounts due from/due to consolidated affiliates	(5,610		)	—			5,610			—
Proceeds from sales of assets and FCC licenses	—			19			—			19
Other, net	—			(8		)	—			(8		)
Net cash (used in) provided by investing activities	(7,309		)	(4,676		)	5,610			(6,375		)
Cash flows from financing activities:
Proceeds from debt and financings	8,880			296			—			9,176
Repayments of debt and capital lease obligations	—			(4,791		)	—			(4,791		)
Debt financing costs	(105		)	(29		)	—			(134		)
Proceeds from issuance of common stock, net	29			—			—			29
Change in amounts due from/due to consolidated affiliates	—			5,610			(5,610		)	—
Net cash provided by (used in) financing activities	8,804			1,086			(5,610		)	4,280
Net increase in cash and cash equivalents	767			137			—			904
Cash and cash equivalents, beginning of period	4,451			996			—			5,447
Cash and cash equivalents, end of period	$	5,218		$	1,133		$	—		$	6,351

Description_of_Operations_Deta

Description of Operations (Details) (USD $)	6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jul. 09, 2013	Jul. 10, 2013	Oct. 22, 2012
Clearwire Acquisition [Member]
Nature of Operations [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$3,500
SoftBank Merger [Member]
Nature of Operations [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		14,100
Convertible Debt			$3,100
Clearwire [Member] | Clearwire Acquisition [Member]
Nature of Operations [Line Items]
Business acquisition, share price	$5

Summary_of_Significant_Account2

Summary of Significant Accounting Policies and Other Information (Details) (USD $)	3 Months Ended		6 Months Ended	12 Months Ended			3 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Jul. 10, 2013	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012
Effect of the change in estimate which reduced operating income (loss)				$80,000,000
Effect of the change in estimate which reduced operating income loss per each share of common stock or unit outstanding				$0.02
Change in Estimates Financial Effect Balance Sheet				80,000,000
Allowance For Doubtful Accounts Writeoffs Net Of Recoveries	106,000,000	105,000,000	374,000,000	752,000,000	98,000,000	549,000,000
Maximum amount of the guarantee liability				248,000,000
Defined Benefit Plan, Special Termination Benefits				560,000,000
Defined Benefit Plan, Settlements, Benefit Obligation				300,000,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.75%			7.75%
Installment billing maximum payment term				24 months
the number of shares available and reserved for future grants under the 2007 Plan and ESPP				172
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term				10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number				19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number				16.6
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized				76,000,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition				1 year 9 months
Network Equipment, Site Costs and Related Software [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life				3 years
Network Equipment, Site Costs and Related Software [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life				30 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life				3 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life				30 years
Non-network Internal Use Software Office Equipment, Leased Devices And Other [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life				3 years
Non-network Internal Use Software Office Equipment, Leased Devices And Other [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life				12 years
Network and Non-network Software [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life				3 years
Network and Non-network Software [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life				5 years
Leased devices [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life				12 years
Leased devices [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life				30 years
U.S. Equity Securities [Member]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities				38.00%
International Equity Securities [Member] [Member]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities				16.00%
Fixed Income Securities [Member]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities				28.00%
Real Estate Investment [Member]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities				9.00%
Other Investment Companies [Member]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities				9.00%
Successor [Member]
Pension expense				59,000,000
Defined Benefit Plan, Fair Value of Plan Assets	1,800,000,000			1,300,000,000
Defined Benefit Plan, Benefit Obligation	2,400,000,000			2,200,000,000
Defined Benefit Plan, Funded Status of Plan	600,000,000			900,000,000
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year				8,000,000
Defined Benefit Plan, Actuarial Net (Gains) Losses	-147,000,000	0		-393,000,000	93,000,000		0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.90%			4.20%	5.30%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match, Base Contribution	100.00%			100.00%	100.00%	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent, Base Contribution	3.00%			3.00%	3.00%	2.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match, Additional Contribution	50.00%			50.00%	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent, Additional Contribution	2.00%			2.00%	2.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	4.00%			4.00%	4.00%
Defined Contribution Plan Fixed Matching Contributions	15,000,000			71,000,000	35,000,000
Percentage of Operating Revenues Related to Universal Service Fund Fees	2.00%			2.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures				22.9
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value				$3.09
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum				1.80%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum				2.06%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum				47.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum				59.10%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate				0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$7.39
Pre Tax Share And Non Share Based Compensation Charges	35,000,000			86,000,000	98,000,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense		12,000,000		34,000,000	34,000,000
Advertising Expense	408,000,000			1,500,000,000	697,000,000
Successor [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term				5 years 6 months
Successor [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term				6 years 6 months
Predecessor [Member]
Defined Benefit Plan, Actuarial Net (Gains) Losses		0	0			-404,000,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay						50.00%
Defined Contribution Maximum Percentage of Participant's Eligible Compensation						2.00%
Defined Contribution Plan Fixed Matching Contributions		15,000,000	32,000,000			30,000,000
Defined contribution plan percentage of discretionary match						100.00%
Defined Contribution Percentage of Discretionary Match Of Participants Contributions Maximum						3.95%
Defined Contribution Plan, Employer Discretionary Contribution Amount						60,000,000
Percentage of Operating Revenues Related to Universal Service Fund Fees					2.00%	2.00%
Pre Tax Share And Non Share Based Compensation Charges		17,000,000	37,000,000			82,000,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense		-1,000,000	2,000,000			14,000,000
Advertising Expense		$409,000,000	$858,000,000			$1,400,000,000
Quoted prices in active markets [Member]
Investment Owned, Percent of Net Assets				47.00%
Observable [Member]
Investment Owned, Percent of Net Assets				35.00%
Unobservable [Member]
Investment Owned, Percent of Net Assets				18.00%
Options Held [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				3 years
Restricted Stock Units (RSUs) [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				1 year
Restricted Stock Units (RSUs) [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				3 years

Significant_Transactions_Detai

Significant Transactions (Details) (USD $)	6 Months Ended		12 Months Ended	6 Months Ended	3 Months Ended			12 Months Ended			3 Months Ended
	Jul. 10, 2013	Jul. 09, 2013	Jun. 30, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2015	Oct. 22, 2012	16-May-14	Apr. 30, 2015	Apr. 24, 2015	Apr. 10, 2015
Business Acquisition [Line Items]
Business Combination, Equity Interest in Acquiree, Remeasurement Net Gain excluded in Pro Forma Financial Results	$1,400,000,000
Business Combination Acquisition Related Costs excluded in Pro Forma Financial Results	169,000,000
Clearwire Acquisition [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		3,500,000,000
Cash Acquired from Acquisition		198,000,000
Cash consideration accrued for dissenting shares relating to stockholders who exercised their right to appraisal		125,000,000
Payments to Acquire Businesses, Gross		3,700,000,000
Goodwill, Purchase Accounting Adjustments			269,000,000
SoftBank Merger [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	14,100,000,000
Cash Acquired from Acquisition	2,500,000,000
Payments to Acquire Businesses, Gross	16,600,000,000
Equity Method Investments, Fair Value Disclosure		3,300,000,000
Conversion of Sprint vested stock-based awards upon acquisition	193,000,000	59,000,000
Goodwill, Purchase Accounting Adjustments			476,000,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	22.00%							21.00%			21.00%
Convertible Debt												3,100,000,000
Debt instrument, interest rate, stated percentage												1.00%
Stock Issued During Period, Shares, Conversion of Convertible Securities	590,476,190
Debt Instrument, Convertible, Conversion Price	$5.25
Business Acquisition, Percentage of Voting Interests Acquired								79.00%			79.00%
Issuance of common stock to stockholders upon acquisition	5,300,000,000
Capital contribution by SoftBank	5,000,000,000
Business combination, cost of acquired entity, additional partial cash paid	1,900,000,000
SoftBank Merger [Member] | Other Intangible Assets [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles				300,000,000
Successor [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired					0	0	0	0	14,112,000,000
Conversion of Sprint vested stock-based awards upon acquisition									193,000,000
Issuance of common stock to stockholders upon acquisition									5,344,000,000
Predecessor [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	4,039,000,000					0				0
deferred tax liability [Member] | Clearwire Acquisition [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities				270,000,000
Accounts Receivable [Member]
Business Acquisition [Line Items]
Accounts Receivable Facility, Expiration Period								2 years
Maximum funding limit													1,300,000,000
Receivables Facility, Amount of Funds Available								500,000,000			500,000,000
Receivables contributed by the Originators to the SPEs								3,500,000,000			3,500,000,000
Derecognized assets, gross								1,800,000,000			1,800,000,000
Cash received for sale of receivables under receivables facility											500,000,000
Receivable from Conduits								1,300,000,000			1,300,000,000
Transfers of financial assets accounted for as a sale, initial fair value of assets obtained as proceeds								1,200,000,000			1,200,000,000
Pledged Financial Instruments and Other Assets, Not Separately Reported on Statement of Financial Position, Description								1.7
Subsequent Event [Member] | Accounts Receivable [Member]
Business Acquisition [Line Items]
Maximum funding limit															3,300,000,000
Installment Receivables added to Receivables Facility Availability															2,000,000,000
Receivables Facility, Amount of Funds Available														1,400,000,000
Funded Balance																$0

Significant_Transactions_Sched

Significant Transactions (Schedule of Purchase Price Allocation) (Details) (Clearwire Acquisition [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Jul. 08, 2013	Jul. 09, 2013
Clearwire Acquisition [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		$778
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		1,245
Finite-Lived Intangibles		12,870
Goodwill, Acquired During Period	437
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		25
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		1,070
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		4,288
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent		2,130
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		876
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		$6,991

Significant_Transactions_Sched1

Significant Transactions (Schedule of Purchase Price Allocation After Merger) (Details) (SoftBank Merger [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Jul. 10, 2013	Oct. 22, 2012
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	$8,576
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, investments	133
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	14,558
Finite-Lived Intangibles	50,672
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	244
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	-10,623
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	-29,481
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	-14,256
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	-3,989
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	22,177
Convertible Debt		3,100
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, after Conversion of the Bond	25,277
Successor [Member]
Business Acquisition [Line Items]
Goodwill	$6,343

Significant_Transactions_Busin

Significant Transactions (Business Acquisition Pro Forma Information) (Details) (Combined Softbank and Clearwire transactions [Member], USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Combined Softbank and Clearwire transactions [Member]
Business Acquisition, Pro Forma Revenue	$35,953	$35,918
Business Acquisition, Pro Forma Net Income (Loss)	($4,290)	($5,141)
Business Acquisition, Pro Forma Earnings Per Share, Basic	($1.12)	($1.35)

Installment_Receivables_Detail

Installment Receivables (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment billing maximum payment term	24 months
Installment receivables, gross	$1,725	$740
Deferred interest	-139	-77
Installment receivables, net of deferred interest	1,586	663
Allowance for credit losses	190	47
Installment receivables, net	1,396	616
Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	1,329	487
Subprime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	396	253
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, net	1,035	299
Other Noncurrent Assets [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, net	361	317
Unbilled Revenues [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	1,602	708
Unbilled Revenues [Member] | Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	1,243	466
Unbilled Revenues [Member] | Subprime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	359	242
Billed Revenues [Member] | Billed receivables, current [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	87	25
Billed Revenues [Member] | Billed receivables, current [Member] | Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	65	16
Billed Revenues [Member] | Billed receivables, current [Member] | Subprime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	22	9
Billed Revenues [Member] | Billed receivables, past due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	36	7
Billed Revenues [Member] | Billed receivables, past due [Member] | Prime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	21	5
Billed Revenues [Member] | Billed receivables, past due [Member] | Subprime [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment receivables, gross	$15	$2

Installment_Receivables_Activi

Installment Receivables (Activity in the Deferred Interest and Allowance for Credit Losses for the Installment Receivables) (Details) (Successor [Member], Financing Receivable [Member], USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2012
Successor [Member] | Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Deferred interest and allowance for credit losses, beginning of period	$124	$329	$13	$0
Bad debt expense	44	398	3
Write-offs, net of recoveries	0	-255	0
Change in deferred interest on short-term and long-term installment receivables	$67	$62	$10

Financial_Instruments_Narative

Financial Instruments (Narative) (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]
Fair value of marketable equity securities	$40	$50

Financial_Instruments_Estimate

Financial Instruments (Estimated Fair Value of Debt, Financing and Capital Lease Obligations) (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current and long-term debt, carrying amount	$33,434	$32,277
Current and long-term debt, total estimated fair value	33,554	34,199
Quoted prices in active markets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current and long-term debt, total estimated fair value	27,238	27,516
Observable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current and long-term debt, total estimated fair value	4,906	5,421
Unobservable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current and long-term debt, total estimated fair value	$1,410	$1,262

Property_Plant_and_Equipment_N1

Property, Plant and Equipment (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended		3 Months Ended			12 Months Ended			3 Months Ended
	Mar. 31, 2013	Jul. 10, 2013	Dec. 31, 2012		Mar. 31, 2014		Dec. 31, 2012	Mar. 31, 2015		Dec. 31, 2013	Dec. 31, 2014
Predecessor [Member]
Property, Plant and Equipment [Line Items]
Asset impairments	$0	$0	$102,000,000	[1]
Predecessor [Member] | iDEN and CDMA [Member]
Property, Plant and Equipment [Line Items]
Incremental effect of accelerated depreciation expense	360,000,000	800,000,000	2,100,000,000
Successor [Member]
Property, Plant and Equipment [Line Items]
Capital Expenditures Incurred but Not yet Paid					2,000,000,000			1,500,000,000		2,400,000,000
Asset impairments	0				75,000,000	[1]	0	2,133,000,000	[1]	0
Wireline [Member]
Property, Plant and Equipment [Line Items]
Estimated fair value											918,000,000
Wireline [Member] | Successor [Member]
Property, Plant and Equipment [Line Items]
Impairment loss											233,000,000
Leased devices [Member]
Property, Plant and Equipment [Line Items]
Non-cash additions to leased devices								1,428,000,000
Increase (decrease) in device and accessory inventory								1,246,000,000
Increase in accounts payable								182,000,000
Asset Under Construction [Member] | Predecessor [Member]
Property, Plant and Equipment [Line Items]
Asset impairments			18,000,000
Capitalized Assets Specific to the Spectrum Hosting [Member] | Predecessor [Member]
Property, Plant and Equipment [Line Items]
Asset impairments			66,000,000
Network Equipment, Site Costs and Related Software [Member] | Predecessor [Member]
Property, Plant and Equipment [Line Items]
Asset impairments			18,000,000
Network Equipment, Site Costs and Related Software [Member] | Wireline [Member] | Predecessor [Member]
Property, Plant and Equipment [Line Items]
Asset impairments			5,000,000
Network Equipment, Site Costs and Related Software [Member] | Wireless [Member] | Predecessor [Member]
Property, Plant and Equipment [Line Items]
Asset impairments			$13,000,000
[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.

Property_Plant_and_Equipment_C

Property, Plant and Equipment (Components of Property Plant and Equipment) (Details) (Successor [Member], USD $)	Mar. 31, 2015	Mar. 31, 2014
In Millions, unless otherwise specified
Property, Plant and Equipment [Line Items]
Less accumulated depreciation	($5,358)	($2,449)
Property, plant and equipment, net	19,721	16,299
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	266	265
Network Equipment, Site Costs and Related Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	18,990	14,902
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	754	745
Non-network internal use software, office equipment, leased devices and other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,979	866
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	$2,090	$1,970

Property_Plant_and_Equipment_C1

Property, Plant and Equipment (Components of Property Plant and Equipment, specifically Leased Handsets) (Details) (Leased devices [Member], USD $)	Mar. 31, 2015	Mar. 31, 2014
In Millions, unless otherwise specified
Leased devices [Member]
Property, Plant and Equipment [Line Items]
Leased devices	$1,974	$0
Less accumulated depreciation	-197	0
Leased devices, net	$1,777	$0

Property_Plant_and_Equipment_S

Property, Plant and Equipment (Schedule of Leases Receivable by Year) (Details) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Property, Plant and Equipment [Line Items]
Fiscal year 2015	$740
Fiscal year 2016	505
Fiscal year 2017	1
Fiscal year 2018 and thereafter	0
Estimated payments to be received for leased devices	$1,246

Intangible_Assets_IndefiniteLi

Intangible Assets (Indefinite-Lived Intangible Assets) (Details) (Successor [Member], USD $)	3 Months Ended				12 Months Ended		15 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2013
Indefinite-lived Intangible Assets [Line Items]
FCC licenses and trademarks, beginning balance		$41,978			$41,978
FCC licenses and trademarks, ending balance	39,987		41,978		39,987		41,978
Goodwill, beginning balance		6,383	6,434		6,383
Goodwill, period increase (decrease)	232	40	-51	[1]	192	[2]
Goodwill, ending balance	6,575		6,383		6,575		6,383
Total indefinite-lived intangible assets including FCC licenses, Trademarks, Goodwill, beginning balance		48,361	48,258		48,361
Indefinite lived intangible assets period increase decrease					-1,799		103
Total indefinite-lived intangible assets including FCC licenses, Trademarks, Goodwill, ending balance	46,562		48,361		46,562		48,361
FCC Licenses [Member]
Indefinite-lived Intangible Assets [Line Items]
FCC licenses and trademarks, beginning balance		36,043			36,043			35,889
FCC licenses and trademarks, period increase (decrease)					-91		154
FCC licenses and trademarks, ending balance	35,952		36,043		35,952		36,043	35,889
Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
FCC licenses and trademarks, beginning balance		5,935			5,935			5,935
FCC licenses and trademarks, period increase (decrease)							0
Impairment of intangible assets, indefinite-lived (excluding goodwill)					-1,900	[3]
FCC licenses and trademarks, ending balance	$4,035		$5,935		$4,035		$5,935	$5,935
[1]	Net reduction to goodwill for the Successor three-month transition period ended March 31, 2014 of $51 million was the result of purchase price allocation adjustments associated with the SoftBank Merger.
[2]	Net additions to goodwill for the Successor year ended March 31, 2015 of approximately $192 million were the result of purchase price allocation adjustments, which consisted of a $232 million increase recorded during the three-month period ended March 31, 2015 to correct the amount of net deferred tax liabilities recognized in connection with the SoftBank Merger and Clearwire Acquisition and a net $40 million decrease recorded during the three-months ended June 30, 2014, which is also associated with the SoftBank Merger and Clearwire Acquisition.
[3]	Net reduction to trademarks for the year ended March 31, 2015 of approximately $1.9 billion was related to the impairment of the Sprint trade name. See discussion below.

Intangible_Assets_Narrative_De

Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended	3 Months Ended		12 Months Ended			3 Months Ended
	Mar. 31, 2013	Jul. 10, 2013	Dec. 31, 2012	Mar. 31, 2014	Dec. 31, 2012	Mar. 31, 2015		Dec. 31, 2013	Dec. 31, 2014	Mar. 31, 2015	Sep. 30, 2014
Predecessor [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Proceeds from sale of assets and FCC licenses	$6,000,000	$10,000,000	$19,000,000
Successor [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Proceeds from sale of assets and FCC licenses	0			1,000,000	0	315,000,000		7,000,000
Goodwill [Member] | Successor [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Projected revenues growth rate									1.50%
Projected revenues, discount rate									8.00%
FCC Licenses [Member] | Successor [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Proceeds from sale of assets and FCC licenses										200,000,000	100,000,000
Trademarks [Member] | Successor [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Projected revenues growth rate									1.50%
Projected revenues, discount rate									16.00%
Estimated fair value of Sprint trade name									3,300,000,000
Impairment due to Sprint trade name						$1,900,000,000	[1]
[1]	Net reduction to trademarks for the year ended March 31, 2015 of approximately $1.9 billion was related to the impairment of the Sprint trade name. See discussion below.

Intangible_Assets_Intangible_A

Intangible Assets (Intangible Assets Subject to Amortization) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	4 years
Minimum [Member] | Favorable tower leases [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	3 years
Minimum [Member] | Reacquired Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	9 years
Minimum [Member] | Other Finite Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	4 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	8 years
Maximum [Member] | Favorable spectrum leases [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	23 years
Maximum [Member] | Favorable tower leases [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	7 years
Maximum [Member] | Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	34 years
Maximum [Member] | Reacquired Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	14 years
Maximum [Member] | Other Finite Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives	10 years
Successor [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	8,988	$8,976
Accumulated amortization	-3,095	-1,418
Net carrying value	5,893	7,558
Successor [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	6,923	6,923
Accumulated amortization	-2,791	-1,289
Net carrying value	4,132	5,634
Successor [Member] | Favorable spectrum leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	884	884
Accumulated amortization	-71	-30
Net carrying value	813	854
Successor [Member] | Favorable tower leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	589	589
Accumulated amortization	-189	-80
Net carrying value	400	509
Successor [Member] | Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	520	520
Accumulated amortization	-27	-12
Net carrying value	493	508
Successor [Member] | Other Finite Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	72	60
Accumulated amortization	-17	-7
Net carrying value	55	53
Successor [Member] | Finite Lived Intangible Assets Excluding Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	2,065	2,053
Accumulated amortization	-304	-129
Net carrying value	1,761	$1,924

Intangible_Assets_Intangible_A1

Intangible Assets (Intangible Assets Subject to Amortization, Future Amortization) (Details) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Intangible Assets Subject to Amortization, Future Amortization [Abstract]
Estimated amortization expense, fiscal year 2015	$1,427
Estimated amortization expense, fiscal year 2016	1,162
Estimated amortization expense, fiscal year 2017	882
Estimated amortization expense, fiscal year 2018	665
Estimated amortization expense, fiscal year 2019	$461

LongTerm_Debt_Financing_and_Ca2

Long-Term Debt, Financing and Capital Lease Obligations (Schedule of Long-term Debt Instruments) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Jul. 10, 2013	Mar. 31, 2014
Debt Instrument [Line Items]
Net premiums	$1,106
Current and long-term debt, financing and capital lease obligations	33,831
Exchangeable Notes [Member] | Clearwire Communications LLC [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			8.25%
Long-term debt, gross			629
Successor [Member]
Debt Instrument [Line Items]
Net premiums	1,106			1,408
Current and long-term debt, financing and capital lease obligations	33,831			32,778
Less current portion	-1,300			-991
Long-term debt, financing and capital lease obligations	32,531			31,787
Successor [Member] | Senior Notes [Member] | Sprint Corporation [Member]
Debt Instrument [Line Items]
Interest rate, minimum	7.13%
Interest rate, maximum	7.88%
Maturity date, start	15-Sep-21
Maturity date, end	15-Feb-25
Long-term debt, gross	10,500			9,000
Successor [Member] | Senior Notes [Member] | Sprint Capital Corporation [Member]
Debt Instrument [Line Items]
Interest rate, minimum	6.88%
Interest rate, maximum	8.75%
Maturity date, start	1-May-19
Maturity date, end	15-Mar-32
Long-term debt, gross	6,204			6,204
Successor [Member] | Senior Notes [Member] | Sprint Nextel Corporation Guaranteed Notes [Member]
Debt Instrument [Line Items]
Interest rate, minimum	6.00%
Interest rate, maximum	11.50%
Maturity date, start	1-Dec-16
Maturity date, end	15-Nov-22
Long-term debt, gross	9,280			9,280
Successor [Member] | Guaranteed Notes [Member] | Sprint Nextel Corporation Guaranteed Notes [Member]
Debt Instrument [Line Items]
Interest rate, minimum	7.00%
Interest rate, maximum	9.00%
Maturity date, start	15-Nov-18
Maturity date, end	1-Mar-20
Long-term debt, gross	4,000			4,000
Successor [Member] | Secured Notes [Member] | iPCS Inc Secured Notes [Member]
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	3.49%
Debt instrument, maturity date	1-May-14
Long-term debt, gross	0			181
Successor [Member] | Secured Notes [Member] | Clearwire Communications LLC [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	14.75%	[1]
Debt instrument, maturity date	1-Dec-16	[1]
Long-term debt, gross	300	[1]		300	[1]
Successor [Member] | Exchangeable Notes [Member] | Clearwire Communications LLC [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	8.25%	[1]
Debt instrument, maturity date	1-Dec-40	[1]
Long-term debt, gross	629	[1]		629	[1]
Successor [Member] | Revolving Credit Facility [Member] | Unsecured Revolving Credit Facility expires in 2018 [Member]
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	3.31%
Maturity date, end	28-Feb-18
Line of credit facility, amount outstanding	0			0
Successor [Member] | Line of Credit [Member] | Export Development Canada Credit Facilities [Member]
Debt Instrument [Line Items]
Maturity date, start	15-Dec-15
Maturity date, end	17-Dec-19
Line of credit facility, amount outstanding	800			500
Successor [Member] | Line of Credit [Member] | Secured Equipment Credit Facilities [Member]
Debt Instrument [Line Items]
Interest rate, minimum	2.00%
Interest rate, maximum	2.20%
Maturity date, start	30-Mar-17
Maturity date, end	19-Dec-22
Line of credit facility, amount outstanding	610			762
Successor [Member] | Financing Obligation [Member]
Debt Instrument [Line Items]
Percentage bearing fixed interest, percentage rate	6.09%
Debt instrument, maturity date	30-Sep-21
Long-term debt, gross	275			327
Successor [Member] | Capital Lease Obligations and Other [Member]
Debt Instrument [Line Items]
Interest rate, minimum	2.35%
Interest rate, maximum	10.52%
Maturity date, start	30-Apr-15
Maturity date, end	21-Nov-23
Long-term debt, gross	$127			$187
Minimum [Member] | Successor [Member] | Line of Credit [Member] | Export Development Canada Credit Facilities [Member]
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	4.00%
Maximum [Member] | Successor [Member] | Line of Credit [Member] | Export Development Canada Credit Facilities [Member]
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	4.08%
[1]	(1)Notes of Clearwire Communications LLC are also direct obligations of Clearwire Finance, Inc. and are guaranteed by certain Clearwire subsidiaries.

LongTerm_Debt_Financing_and_Ca3

Long-Term Debt, Financing and Capital Lease Obligations (Narrative) (Details) (USD $)

1 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

1-May-14

Mar. 31, 2015

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2013

Jul. 10, 2013

Dec. 31, 2012

Feb. 24, 2015

Sep. 11, 2013

Dec. 12, 2013

Dec. 31, 2014

Apr. 02, 2013

Oct. 31, 2014

tranche

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt issued by 100% owned subsidiary and is fully and unconditionally guaranteed by the parent

$21,500,000,000

Secured debt

1,300,000,000

Secured Debt Collateral

14,600,000,000

Redeemable notes

30,100,000,000

Principal amount of notes with the right to require the Company to repurchase on change of control

21,600,000,000

Percentage of principal amount required to repurchase notes on change of control

101.00%

Fixed amount of cash for a fixed principal amount of notes surrendered that becomes exchangeable at the holder's option

706.21

Fixed principal amount of notes surrendered for a fixed amount of cash that becomes exchangeable at the holder's option

1,000

Number of cell sites leased back

3,000

Term in years for cell sites leased back renewal options

20

Ratio of total indebtedness to adjusted EBITDA

2.5

Exchangeable Notes [Member] | Clearwire Communications LLC [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

629,000,000

Debt instrument, interest rate, stated percentage

8.25%

Total cash consideration payable upon an exchange of all principal amount of notes outstanding

444,000,000

Secured Notes [Member] | Clearwire Communications LLC [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Principal amount of notes with the right to require the Company to repurchase on change of control

300,000,000

Secured Notes [Member] | iPCS Inc Secured Notes [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Repayments of long-term debt

181,000,000

Senior Notes [Member] | Sprint Communications Inc. Guaranteed Notes due 2021 [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Debt instrument, interest rate, stated percentage

7.63%

7.25%

Debt instrument, face amount

1,500,000,000

2,250,000,000

Senior Notes [Member] | Sprint Corporation 7.875% [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Debt instrument, interest rate, stated percentage

7.88%

Debt instrument, face amount

4,250,000,000

Senior Notes [Member] | Sprint Corporation 7.125% [Member] [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Debt instrument, interest rate, stated percentage

7.13%

Debt instrument, face amount

2,500,000,000

Line of Credit [Member] | Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Debt instrument, annual principal payment

254,000,000

Line of Credit [Member] | Finnvera Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, maximum borrowing capacity

800,000,000

Debt instrument, annual principal payment

28,000,000

Number of tranches

3

Line of Credit [Member] | K-sure Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, maximum borrowing capacity

750,000,000

Number of tranches

3

Line of Credit [Member] | Delcredere / Ducroire (D/D) Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, maximum borrowing capacity

250,000,000

Revolving Credit Facility [Member] | Unsecured Revolving Credit Facility expires in 2018 [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, maximum borrowing capacity

3,300,000,000

Line of credit facility, remaining borrowing capacity

2,800,000,000

Letter of Credit [Member] | Unsecured Revolving Credit Facility expires in 2018 [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Letters of credit outstanding, amount

470,000,000

Successor [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Interest costs capitalized

56,000,000

13,000,000

30,000,000

Cash interest payments

2,300,000,000

559,000,000

1,000,000,000

Senior notes weighted average effective interest rate

6.10%

6.20%

6.40%

Successor [Member] | Exchangeable Notes [Member] | Clearwire Communications LLC [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

629,000,000

[1]

629,000,000

[1]

Debt instrument, interest rate, stated percentage

8.25%

[1]

Successor [Member] | Secured Notes [Member] | Clearwire Communications LLC [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

300,000,000

[1]

300,000,000

[1]

Debt instrument, interest rate, stated percentage

14.75%

[1]

Successor [Member] | Secured Notes [Member] | iPCS Inc Secured Notes [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

0

181,000,000

Successor [Member] | Senior Notes [Member] | Sprint Corporation [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

10,500,000,000

9,000,000,000

Successor [Member] | Senior Notes [Member] | Sprint Nextel Corporation Guaranteed Notes [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

9,280,000,000

9,280,000,000

Successor [Member] | Line of Credit [Member] | Export Development Canada Credit Facilities [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, amount outstanding

800,000,000

500,000,000

Successor [Member] | Line of Credit [Member] | Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, amount outstanding

508,000,000

Successor [Member] | Line of Credit [Member] | Finnvera Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, amount outstanding

44,000,000

Successor [Member] | Line of Credit [Member] | K-sure Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, amount outstanding

58,000,000

Successor [Member] | Guaranteed Notes [Member] | Sprint Nextel Corporation Guaranteed Notes [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

4,000,000,000

4,000,000,000

Successor [Member] | Revolving Credit Facility [Member] | Unsecured Revolving Credit Facility expires in 2018 [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, amount outstanding

0

0

Predecessor [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Interest costs capitalized

15,000,000

29,000,000

278,000,000

Cash interest payments

305,000,000

814,000,000

1,400,000,000

Senior notes weighted average effective interest rate

7.10%

8.90%

7.50%

Tranche three [Member] | Successor [Member] | Line of Credit [Member] | Export Development Canada Credit Facilities [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit, additional drawdown

300,000,000

Tranche one [Member] | Line of Credit [Member] | Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, amount outstanding

1,000,000,000

Tranche one [Member] | Line of Credit [Member] | Finnvera Secured Equipment Credit Facility [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Line of credit facility, amount outstanding

72,000,000

Parent [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Long-term debt, gross

10,500,000,000

Unsecured Revolving Credit Facility expires in 2018 [Member]

Schedule of Capitalization, Long-term Debt [Line Items]

Ratio of total indebtedness to adjusted EBITDA through the quarter ended December 31, 2015

6.5

Ratio of total indebtedness to adjusted EBITDA through the quarter ended December 31, 2016

6.25

Required ratio of total indebtedness to adjusted EBITDA for each fiscal quarter ending thereafter through expiration of the revolving credit facility

6

Minimum required cash remaining on hand for operations as part of covenants

$2,000,000,000

[1]

(1)Notes of Clearwire Communications LLC are also direct obligations of Clearwire Finance, Inc. and are guaranteed by certain Clearwire subsidiaries.

LongTerm_Debt_Financing_and_Ca4

Long-Term Debt, Financing and Capital Lease Obligations (Schedule of Maturities of Long-term Debt) (Details) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Long-term Debt, Fiscal Year Maturity [Abstract]
Fiscal year 2015	$1,300
Fiscal year 2016	3,643
Fiscal year 2017	1,379
Fiscal year 2018	3,068
Fiscal year 2019	3,094
Fiscal year 2020 and thereafter	20,241
Long-term debt	32,725
Net premiums	1,106
Current and long-term debt, financing and capital lease obligations	$33,831

Severance_and_Exit_Costs_Detai

Severance and Exit Costs (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013		Jul. 10, 2013		Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2015
Predecessor [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	$17	[1]	$58	[1]
Successor [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs					14	[2]	219	[3]	253	[4]
Lease and access exit costs [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected future cost									75
Lease and access exit costs [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected future cost									150
Wireless [Member] | Predecessor [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	14		55
Wireless [Member] | Successor [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, accrual adjustment									41
Severance costs					12		191		218
Wireline [Member] | Predecessor [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	3		3
Wireline [Member] | Successor [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs					$2		$28		$35
[1]	(12)For the 191-day period ended July 10, 2013, we recognized costs of $58 million ($55 million Wireless, and $3 million was Wireline). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $17 million ($14 million Wireless, and $3 million Wireline).
[2]	(5)For the three-month transition period ended March 31, 2014, we recognized costs of $14 million ($12 million Wireless, $2 million Wireline).
[3]	(9)For the year ended December 31, 2013, we recognized costs of $219 million ($191 million Wireless, $28 million Wireline).
[4]	(2)For the Successor year ended March 31, 2015, we recognized costs of $253 million ($218 million Wireless, $35 million Wireline).

Severance_and_Exit_Costs_Sched

Severance and Exit Costs (Schedule of Severance and Exit Costs Liability) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2015		Mar. 31, 2013		Jul. 10, 2013		Dec. 31, 2012
Successor [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning	$1,138		$1,176		$971
Severance costs, beginning	225		54		197
Restructuring charges	56		328		263
Severance costs	14	[1]	219	[2]	253	[3]
Restructuring reserve, settled with cash	-223		-366		-780
Payments for postemployment benefits	-42		-48		-331
Restructuring reserve, end	971		1,138		454
Severance costs, end	197		225		119
Successor [Member] | Lease [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning	764		933	[4]	650
Restructuring charges excluding US Cellular gain					13
Restructuring charges	11	[5]	56	[6]	-28	[7]
Restructuring reserved settled with cash and other adjustments	-125		-225		-331
Restructuring reserve, end	650		764		291
Successor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning	149		189		124
Restructuring charges	31	[8]	53	[9]	38	[10]
Restructuring reserved settled with cash and other adjustments	-56		-93		-118
Restructuring reserve, end	124		149		44
Predecessor [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning							244		244
Severance costs, beginning							11		11
Purchase price adjustments									131
Restructuring charges									687
Severance costs							17	[11]	58	[11]
Restructuring reserve, settled with cash									-53
Payments for postemployment benefits									-15
Restructuring reserve, end									1,009
Severance costs, end									54
Predecessor [Member] | Lease [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning							190		190
Purchase price adjustments									131
Restructuring reserved settled with cash and other adjustments									-33
Restructuring reserve, end									766
Predecessor [Member] | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Purchase price adjustments									0
Predecessor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning							43		43
Purchase price adjustments									0
Restructuring charges									151	[12]
Restructuring reserved settled with cash and other adjustments									-5
Restructuring reserve, end									189
Cost of Products and Services [Member] | Predecessor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges							7		35
Restructuring Charges [Member] | Predecessor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges									116
Wireline [Member] | Successor [Member]
Restructuring Reserve [Roll Forward]
Severance costs	2		28		35
Wireline [Member] | Successor [Member] | Lease [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges			2		1
Wireline [Member] | Successor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges					5
Wireline [Member] | Predecessor [Member]
Restructuring Reserve [Roll Forward]
Severance costs							3		3
Wireline [Member] | Predecessor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges							3		18
Wireline [Member] | Cost of Products and Services [Member] | Successor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges	4		19
Wireless [Member] | Successor [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, accrual adjustment					41
Severance costs	12		191		218
Wireless [Member] | Successor [Member] | Lease [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges			54		12
Wireless [Member] | Successor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges					33
Wireless [Member] | Predecessor [Member]
Restructuring Reserve [Roll Forward]
Severance costs							14		55
Wireless [Member] | Predecessor [Member] | Lease [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges							8	[13]	478	[13]	196
Wireless [Member] | Predecessor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges							4		133
Wireless [Member] | Restructuring Charges [Member] | Successor [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges	$27								$34
[1]	(5)For the three-month transition period ended March 31, 2014, we recognized costs of $14 million ($12 million Wireless, $2 million Wireline).
[2]	(9)For the year ended December 31, 2013, we recognized costs of $219 million ($191 million Wireless, $28 million Wireline).
[3]	(2)For the Successor year ended March 31, 2015, we recognized costs of $253 million ($218 million Wireless, $35 million Wireline).
[4]	(7)The July 11, 2013 opening balance takes into account purchase price adjustments as it relates to the SoftBank Merger.
[5]	(4)For the three-month transition period ended March 31, 2014, we recognized costs of $11 million (solely attributable to Wireless).
[6]	(8)For the year ended December 31, 2013, we recognized costs of $56 million ($54 million Wireless, $2 million Wireline).
[7]	(1)In addition to the $41 million gain (Wireless only) related to U.S. Cellular recognized, we recognized costs of $13 million ($12 million Wireless and $1 million Wireline) for the year ended March 31, 2015.
[8]	(6)For the three-month transition period ended March 31, 2014, $4 million (solely attributable to Wireline) was recognized as "Cost of services" and $27 million (solely attributable to Wireless) was recognized in "Severance and exit costs."
[9]	(10)For the year ended December 31, 2013, $19 million (solely attributable to Wireline) was recognized as "Cost of services" and $34 million (solely attributable to Wireless) was recognized in "Severance and exit costs."
[10]	(3)For the Successor year ended March 31, 2015, we recognized costs of $38 million ($33 million Wireless, $5 million Wireline).
[11]	(12)For the 191-day period ended July 10, 2013, we recognized costs of $58 million ($55 million Wireless, and $3 million was Wireline). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $17 million ($14 million Wireless, and $3 million Wireline).
[12]	(13)Of the $151 million ($133 million Wireless; $18 million Wireline) recognized for the 191-day period ended July 10, 2013, $35 million was recognized as "Cost of services" and $116 million was recognized in "Severance and exit costs." For the unaudited three-month period ended March 31, 2013, we recognized $7 million ($4 million Wireless; $3 million Wireline) all as "Cost of services."
[13]	(11)For the 191-day period ended July 10, 2013, we recognized net costs of $478 million (solely attributable to our Wireless segment). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $8 million (solely attributable to our Wireless segment).

Supplemental_Financial_Informa2

Supplemental Financial Information (Details) (Successor [Member], USD $)	Mar. 31, 2015		Mar. 31, 2014
In Millions, unless otherwise specified
Successor [Member]
Accounts and notes receivable, net
Trade	$1,037		$3,271
Unbilled trade and other	1,457		533
Less allowance for doubtful accounts	-204		-197
Accounts and notes receivable, net	2,290		3,607
Prepaid expenses and other current assets
Prepaid expenses	401		451
Due from conduits for receivables sold	1,198		0
Deferred charges and other	291		221
Prepaid expense and other assets, current	1,890		672
Other assets
Unbilled trade installment receivables, net	361		317
Investments	151		146
Other	565		429
Other assets	1,077		892
Accounts payable
Trade	3,786	[1]	2,492	[1]
Accrued interconnection costs	198	[1]	316	[1]
Capital expenditures and other	363	[1]	355	[1]
Accounts payable	4,347	[1]	3,163	[1]
Accrued expenses and other current liabilities
Deferred revenues	1,385		1,286
Accrued taxes	238		306
Payroll and related	589		290
Severance, lease and other exit costs	223		555
Accrued interest	525		515
Accrued capital expenditures	705		1,247
Other	1,628		1,345
Accrued expenses and other current liabilites	5,293		5,544
Other liabilities
Deferred rental income-communications towers	229		240
Deferred rent	366		179
Asset retirement obligations	584		651
Unfavorable lease liabilities	856		1,068
Post-retirement benefits and other non-current employee related liabilities	987		647
Other	929		900
Other liabilities	3,951		3,685
Checks issued in excess of associated bank balances but not yet presented for collection	$90		$91
[1]	Includes liabilities in the amounts of $90 million and $91 million as of March 31, 2015 and 2014, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended			3 Months Ended			12 Months Ended	6 Months Ended	3 Months Ended
	Jul. 10, 2013	Mar. 31, 2015		Dec. 31, 2012	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Jul. 09, 2013	Dec. 31, 2014
Income Tax Contingency [Line Items]
Income tax expense	$1,600,000,000
FCC license amortization period for tax purposes (in years)		15 years
Effective income tax rate reconciliation, tax settlement, amount				69,000,000
Deferred tax assets, operating loss carryforwards, domestic		7,000,000,000
Deferred tax assets, operating loss carryforwards, state and local		951,000,000
Deferred tax assets, operating loss carryforwards, foreign		266,000,000
Capital loss carryforward		220,000,000
Deferred tax assets, capital loss carryforwards		84,000,000
Deferred tax assets, tax credit carryforwards		451,000,000
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound		20,000,000
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		19,900,000,000
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		20,600,000,000
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		797,000,000
Federal AMT [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		20,900,000,000
State AMT [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		4,900,000,000
Successor [Member]
Income Tax Contingency [Line Items]
Change in valuation allowance		911,000,000			82,000,000	0	4,000,000	708,000,000
Income tax expense		-574,000,000			56,000,000	1,000,000	4,000,000	45,000,000
Gain on previously-held equity interests		0			0	0	0	0
Income (loss) from continuing operations before income taxes, foreign		398,000,000			110,000,000			263,000,000
Deferred tax assets, capital loss carryforwards		84,000,000			82,000,000
Unrecognized tax benefit		163,000,000			160,000,000			166,000,000
Predecessor [Member]
Income Tax Contingency [Line Items]
Change in valuation allowance	1,410,000,000			1,756,000,000		265,000,000
Income tax expense	1,601,000,000			154,000,000		38,000,000
Gain on previously-held equity interests	-2,926,000,000			0		0
Income (loss) from continuing operations before income taxes, foreign	238,000,000			319,000,000		96,000,000
Clearwire [Member] | Predecessor [Member]
Income Tax Contingency [Line Items]
Gain on previously-held equity interests									-2,900,000,000
Expiration Between 2016 and 2020 [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		1,400,000,000
Expiration Between 2021 and 2034 [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		18,500,000,000
No Expiration [Member]
Income Tax Contingency [Line Items]
Deferred tax assets, tax credit carryforwards		128,000,000
No Expiration [Member] | Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		426,000,000
Expire Prior to 2016 [Member]
Income Tax Contingency [Line Items]
Deferred tax assets, tax credit carryforwards		3,000,000
Expire Between 2016 and 2034 [Member] [Member]
Income Tax Contingency [Line Items]
Deferred tax assets, tax credit carryforwards		320,000,000
Trademarks [Member] | Successor [Member]
Income Tax Contingency [Line Items]
Impairment of intangible assets, indefinite-lived (excluding goodwill)		1,900,000,000	[1]
Wireless [Member] | Trademarks [Member] | Successor [Member]
Income Tax Contingency [Line Items]
Impairment of intangible assets, indefinite-lived (excluding goodwill)										$1,900,000,000
[1]	Net reduction to trademarks for the year ended March 31, 2015 of approximately $1.9 billion was related to the impairment of the Sprint trade name. See discussion below.

Income_Taxes_Schedule_of_Incom

Income Taxes (Schedule of Income Tax (Expense) Benefit) (Details) (USD $)	6 Months Ended	3 Months Ended			12 Months Ended
In Millions, unless otherwise specified	Jul. 10, 2013	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2012
Deferred income tax benefit (expense)
Total income tax benefit (expense)	($1,600)
Successor [Member]
Current income tax (expense) benefit
Federal		0	-2	-3	5	1
State		-10	0	0	-39	-13
Total current income tax (expense) benefit		-10	-2	-3	-34	-12
Deferred income tax benefit (expense)
Federal		-48	1	-1	491	-46
State		2	0	0	118	14
Total deferred income tax benefit (expense)		-46	1	-1	609	-32
Foreign income tax expense		0		0	-1	-1
Total income tax benefit (expense)		-56	-1	-4	574	-45
Predecessor [Member]
Current income tax (expense) benefit
Federal	2		-8				34
State	-17		-6				22
Total current income tax (expense) benefit	-15		-14				56
Deferred income tax benefit (expense)
Federal	-1,402		-19				-199
State	-184		-5				-10
Total deferred income tax benefit (expense)	-1,586		-24				-209
Foreign income tax expense	0		0				-1
Total income tax benefit (expense)	($1,601)		($38)				($154)

Income_Taxes_Effective_Income_

Income Taxes (Effective Income Tax Rate) (Details) (USD $)	6 Months Ended	12 Months Ended	3 Months Ended			12 Months Ended
In Millions, unless otherwise specified	Jul. 10, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Federal statutory income tax rate		35.00%
Total income tax benefit (expense)	($1,600)
Successor [Member]
Operating Loss Carryforwards [Line Items]
Income tax benefit (expense) at the federal statutory rate		1,372	33	3	8	635
State income taxes, net of federal income tax effect		124	-4	0	0	47
State law changes, net of federal income tax effect		4	5	0	0	10
Reduction (increase) in liability for unrecognized tax benefits		1	0	0	0	2
Change in valuation allowance		-911	-82	0	-4	-708
Other, net		-16	-8	-4	-8	-31
Total income tax benefit (expense)		574	-56	-1	-4	-45
Effective income tax rate		-14.60%	58.90%	12.50%	17.40%	-2.50%
Predecessor [Member]
Operating Loss Carryforwards [Line Items]
Income tax benefit (expense) at the federal statutory rate	-155			212			1,460
State income taxes, net of federal income tax effect	-18			16			137
State law changes, net of federal income tax effect	0			0			-5
Reduction (increase) in liability for unrecognized tax benefits	-7			0			38
Change in valuation allowance	-1,410			-265			-1,756
Other, net	-11			-1			-28
Total income tax benefit (expense)	($1,601)			($38)			($154)
Effective income tax rate	361.40%			6.30%			-3.70%

Income_Taxes_Income_Tax_Expens

Income Taxes (Income Tax (Expense) Benefit Allocated to Other Items) (Details) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Mar. 31, 2014

Mar. 31, 2015

Dec. 31, 2013

Mar. 31, 2013

Jul. 10, 2013

Dec. 31, 2012

Successor [Member]

Income Tax Contingency [Line Items]

Unrecognized net periodic pension and other postretirement benefit cost

$0

[1]

$0

[1]

($58)

[1]

Unrealized holding gains/losses on securities

-1

[1]

0

[1]

-3

[1]

Predecessor [Member]

Income Tax Contingency [Line Items]

Unrecognized net periodic pension and other postretirement benefit cost

-10

[1]

-18

[1]

0

[1]

Unrealized holding gains/losses on securities

($1)

[1]

$0

[1]

$0

[1]

[1]

(1)These amounts have been recognized in accumulated other comprehensive loss.

Income_Taxes_Deferred_Income_T

Income Taxes (Deferred Income Tax Assets and Liabilities) (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
In Millions, unless otherwise specified
Deferred tax assets
Capital loss carryforwards, long-term	$84
Successor [Member]
Deferred tax assets
Net operating loss carryforwards, long-term	8,155	7,264
Tax credit carryforwards, long-term	381	374
Capital loss carryforwards, long-term	84	82
Property, plant and equipment, long-term	261	500
Debt obligations, long-term	419	598
Deferred rent, long-term	470	474
Pension and other postretirement benefits, long-term	385	252
Accruals and other liabilities, current	637	738
Accruals and other liabilities, long-term	561	601
Deferred tax assets, gross, current	637	738
Deferred tax assets, gross, noncurrent	10,716	10,145
Valuation allowance, current	-509	-522
Valuation allowance, noncurrent	-8,371	-7,175
Deferred tax assets, net of valuation allowance, current	128	216
Deferred tax assets, net of valuation allowance, noncurrent	2,345	2,970
Deferred tax liabilities
FCC Licenses	12,558	12,158
Trademarks	1,725	2,461
Intangibles	1,658	2,248
Other, current	66	88
Other, long-term	302	310
Deferred tax liabilities, current	66	88
Deferred tax liabilities, long-term	16,243	17,177
Current deferred tax asset	62	128
Long-term deferred tax liability	$13,898	$14,207

Income_Taxes_Unrecognized_Tax_

Income Taxes (Unrecognized Tax Benefit Rollforward) (Details) (Successor [Member], USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2015
Successor [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$166	$160
Additions based on current year tax positions	0	5
Additions based on prior year tax positions	1	3
Reductions for prior year tax positions	-1	-3
Reductions for settlements	0	-1
Reductions for lapse of statute of limitations	-6	-1
Balance at end of period	$160	$163

Commitments_and_Contingencies_2

Commitments and Contingencies (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Apr. 19, 2012	Mar. 31, 2015	Mar. 31, 2014	Jul. 10, 2013	Dec. 31, 2012	Jun. 30, 2014	Dec. 31, 2013
		renewal_option
Commitments and Contingencies [Line Items]
Sales receipts alleged to not be reported, amount	$100,000,000
Minimum spectrum reconfiguration obligations		2,800,000,000
Total Payments directly attributable to performance under Report and Order		3,400,000,000
Noncancelable portion of leases, maximum		15 years
Number of operating lease renewals available		1
Operating lease, maximum contract length to become eligible for renewal contract, term		10 years
General initial term of operating lease, minimum		5 years
General initial term of operating lease, maximum		12 years
Number of cell site renewal options available		5
Years for each renewal option for cell site leases		5 years
Maximum length of spectrum lease agreements		30 years
Maximum remaining commitments of other spectrum commitments		90,000,000
Predecessor [Member]
Commitments and Contingencies [Line Items]
Operating leases, rent expense, net			483,000,000	1,000,000,000	2,000,000,000
Successor [Member]
Commitments and Contingencies [Line Items]
Payments directly attributable to performance under report and order, net change		157,000,000
Licensees reimbursed share of costs						95,000,000
Operating leases, rent expense, net		2,600,000,000	653,000,000				1,300,000,000
Payment to satisfy other spectrum commitments		9,000,000
Minimum [Member]
Commitments and Contingencies [Line Items]
Remaining other spectrum commitments expected to be incurred over term		15 years
Maximum [Member]
Commitments and Contingencies [Line Items]
Remaining other spectrum commitments expected to be incurred over term		30 years
Letter Of Credit Required By The FCCs Report And Order [Member] | Unsecured Revolving Credit Facility expires in 2018 [Member]
Commitments and Contingencies [Line Items]
Initial letter of credit requirement		2,500,000,000
Letters of credit outstanding, amount		$406,000,000

Commitments_and_Contingencies_3

Commitments and Contingencies (Future Minimum Lease Commitments) (Details) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Operating leases
Total	$15,381
2015	2,122
2016	2,078
2017	2,015
2018	1,964
2019	1,857
2020 and thereafter	5,345
Spectrum leases and service credits
Total	6,725
2015	194
2016	204
2017	212
2018	214
2019	218
2020 and thereafter	5,683
Purchase orders and other commitments
Total	15,004
2015	8,861
2016	2,614
2017	1,147
2018	914
2019	460
2020 and thereafter	1,008
Total future minimum commitments
Total	37,110
2015	11,177
2016	4,896
2017	3,374
2018	3,092
2019	2,535
2020 and thereafter	$12,036

Stockholders_Equity_and_Per_Sh2

Stockholders' Equity and Per Share Data (Narrative) (Details) (USD $)	Mar. 31, 2015	Jul. 10, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014	Dec. 31, 2013
	years
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Capital stock authorized (in shares)	10,020,000,000
Preferred stock, shares authorized (in shares)	20,000,000
Preferred stock, par value	$0.00
Common stock, shares, outstanding (in shares)	4,000,000,000
Class of warrant or right, exercise price of warrants or rights	$5.25
Exercise period for warrant	5
Series 1 Voting [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common shares, shares authorized (in shares)	9,000,000,000
Common stock, par value	$0.01
Non Voting [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common shares, shares authorized (in shares)	1,000,000,000
Common stock, par value	$0.01
Predecessor [Member] | Options and RSUs [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Number of shares that had no effect on computation of dilutive weighted average number of shares outstanding (in shares)		61,000,000	74,000,000	78,000,000
Successor [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Common shares, shares authorized (in shares)	9,000,000,000				9,000,000,000
Common stock, par value	$0.01				$0.01
Number of stock that will be issued shares warrant (in shares)	55,000,000
Successor [Member] | Options and RSUs [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Number of shares that had no effect on computation of dilutive weighted average number of shares outstanding (in shares)	56,000,000				60,000,000	70,000,000

Stockholders_Equity_and_Per_Sh3

Stockholders' Equity and Per Share Data (Accumulated Other Comprehensive Income (Loss)) (Details) (Successor [Member], USD $)	Mar. 31, 2015	Mar. 31, 2014
In Millions, unless otherwise specified
Successor [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Unrecognized net periodic pension and postretirement benefit cost		($54)
Unrealized net gains related to investments		7
Foreign currency translation adjustments		4
Accumulated other comprehensive loss	($408)	($43)

Segments_Segment_Financial_Inf

Segments (Segment Financial Information) (Details) (USD $)	12 Months Ended		3 Months Ended													6 Months Ended				12 Months Ended		15 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2015		Mar. 31, 2015	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, 2012		Dec. 31, 2013		Jul. 10, 2013		Dec. 31, 2013		Mar. 31, 2014	Jul. 10, 2013	Jul. 09, 2013	Dec. 31, 2012
	segments
Segment Reporting Information [Line Items]
Number of reportable segments	2
Successor [Member]
Segment Reporting Information [Line Items]
Net operating revenues	34,532,000,000						$8,875,000,000					$0		$0				$16,891,000,000		$16,891,000,000
Inter-segment revenues	34,532,000,000		8,292,000,000	8,973,000,000	8,488,000,000	8,789,000,000	8,875,000,000		9,142,000,000	7,749,000,000	0	0		0						16,891,000,000
Total segment operating expenses	-28,532,000,000						-7,031,000,000					-14,000,000		-33,000,000						-14,525,000,000
Segment earnings	6,000,000,000						1,844,000,000					-14,000,000		-33,000,000						2,366,000,000
Depreciation	3,797,000,000						868,000,000					0		0						2,026,000,000
Amortization	-1,552,000,000						-429,000,000					0		0						-908,000,000
Impairments	-2,133,000,000	[1]					-75,000,000	[1]				0		0						0
Other, net	-413,000,000	[2]					-52,000,000	[2]												-402,000,000	[2]
Operating (loss) income	-1,895,000,000		318,000,000	-2,540,000,000	-192,000,000	519,000,000	420,000,000		-576,000,000	-358,000,000	-22,000,000	-14,000,000		-33,000,000						-970,000,000
Interest expense	-2,051,000,000						-516,000,000					0		0						-918,000,000
Equity in losses of unconsolidated investments, net	0						0					0		0						0
Gain on previously-held equity interests	0						0					0		0						0
Other income (expense), net	27,000,000						1,000,000					6,000,000		10,000,000						73,000,000
Income (loss) before income taxes	-3,919,000,000						-95,000,000					-8,000,000		-23,000,000						-1,815,000,000
Capital expenditures - network and other	5,422,000,000						1,488,000,000					0		0						3,847,000,000		1,488,000,000
Capital expenditures - network and other, inclusive of equipment on lease	6,004,000,000
Assets	83,030,000,000		83,030,000,000				84,689,000,000		86,095,000,000			3,122,000,000		3,115,000,000		86,095,000,000				86,095,000,000		84,689,000,000			3,115,000,000
Severance, exit costs and asset impairments	-304,000,000						-52,000,000
Legal fees	-91,000,000
Pension expense	59,000,000
Severance and exit costs	304,000,000						52,000,000					0		0						309,000,000
Business combination, acquisition related costs																				-100,000,000
Other nonrecurring (income) expense																7,000,000
Restructuring charges	-263,000,000						-56,000,000									-328,000,000
Other, net	-109,000,000						0					0		0						0
Successor [Member] | Corporate Segment [Member]
Segment Reporting Information [Line Items]
Business combination, acquisition related costs																				-75,000,000
Successor [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Net operating revenues	32,327,000,000						8,254,000,000					0		0						15,642,000,000
Inter-segment revenues	32,327,000,000						8,254,000,000													15,642,000,000
Total segment operating expenses	-26,433,000,000						-6,417,000,000					0		0						-13,464,000,000
Segment earnings	5,894,000,000						1,837,000,000					0		0						2,178,000,000
Capital expenditures - network and other	5,442,000,000																			3,535,000,000		1,343,000,000
Assets	75,581,000,000		75,581,000,000				75,051,000,000		75,128,000,000			0		0		75,128,000,000				75,128,000,000		75,051,000,000			0
Restructuring reserve, accrual adjustment	41,000,000
Business combination, acquisition related costs																				-25,000,000
Successor [Member] | Wireline [Member]
Segment Reporting Information [Line Items]
Net operating revenues	2,191,000,000						617,000,000					0		0						1,240,000,000
Inter-segment revenues	2,814,000,000						770,000,000											1,636,000,000
Total segment operating expenses	-2,701,000,000						-758,000,000					0		0						-1,414,000,000
Segment earnings	113,000,000						12,000,000					0		0						222,000,000
Capital expenditures - network and other	275,000,000																			153,000,000		79,000,000
Assets	1,261,000,000		1,261,000,000				1,499,000,000		1,548,000,000			0		0		1,548,000,000				1,548,000,000		1,499,000,000			0
Impairment loss				233,000,000
Successor [Member] | Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Net operating revenues	14,000,000						4,000,000					0		0						9,000,000
Inter-segment revenues	-609,000,000	[3]					-149,000,000	[3]										-387,000,000	[3]
Total segment operating expenses	602,000,000						144,000,000					-14,000,000		-33,000,000						353,000,000
Segment earnings	-7,000,000						-5,000,000					-14,000,000		-33,000,000						-34,000,000
Capital expenditures - network and other	287,000,000																			159,000,000		66,000,000
Assets	6,188,000,000		6,188,000,000				8,139,000,000		9,419,000,000			3,122,000,000		3,115,000,000		9,419,000,000				9,419,000,000		8,139,000,000			3,115,000,000
Successor [Member] | Lease [Member]
Segment Reporting Information [Line Items]
Restructuring charges	28,000,000	[4]					-11,000,000	[5]								-56,000,000	[6]
Successor [Member] | Lease [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Restructuring charges	-12,000,000															-54,000,000
Successor [Member] | Lease [Member] | Wireline [Member]
Segment Reporting Information [Line Items]
Restructuring charges	-1,000,000															-2,000,000
Predecessor [Member]
Segment Reporting Information [Line Items]
Net operating revenues												8,793,000,000						18,602,000,000							35,366,000,000
Inter-segment revenues										8,877,000,000		8,793,000,000						18,602,000,000					932,000,000		35,345,000,000
Total segment operating expenses												-7,269,000,000						-15,559,000,000							-30,563,000,000
Segment earnings												1,524,000,000						3,043,000,000							4,803,000,000
Depreciation												1,422,000,000						3,098,000,000							6,240,000,000
Amortization												-70,000,000						-147,000,000							-303,000,000
Business combination and hurricane-related charges																									-64,000,000	[7]
Impairments												0						0							-102,000,000	[1]
Other, net												-3,000,000	[2]					-683,000,000	[2]						86,000,000	[2]
Operating (loss) income										874,000,000		29,000,000						-885,000,000					-40,000,000		-1,820,000,000
Interest expense												-432,000,000						-1,135,000,000							-1,428,000,000
Equity in losses of unconsolidated investments, net												-202,000,000						-482,000,000						-482,000,000	-1,114,000,000
Gain on previously-held equity interests												0						2,926,000,000							0
Income loss from equity method investments, net												-202,000,000						2,444,000,000
Other income (expense), net												0						19,000,000							190,000,000
Income (loss) before income taxes												-605,000,000						443,000,000							-4,172,000,000
Capital expenditures - network and other												1,381,000,000						3,140,000,000							4,261,000,000
Assets														51,570,000,000											51,570,000,000
Severance, exit costs and asset impairments												-25,000,000
Severance and exit costs												25,000,000						652,000,000							196,000,000
Business combination, acquisition related costs																		-53,000,000							-19,000,000
Other nonrecurring (income) expense																									-45,000,000
Restructuring charges																		-687,000,000
Other, net												22,000,000						22,000,000							282,000,000
Payment received for incremental costs or obligations incurred by the Company for Spectrum Hosting																									236,000,000
Gain Loss from asset dispositions and exchanges																									29,000,000
Net benefit resulting from favorable developments relating to access cost disputes associated with prior periods																									17,000,000
Cost of services and products, nonrecurring																									20,000,000
Predecessor [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Net operating revenues												8,089,000,000						17,125,000,000							32,355,000,000
Inter-segment revenues												8,089,000,000						17,125,000,000							32,355,000,000
Total segment operating expenses												-6,694,000,000						-14,355,000,000							-28,208,000,000
Segment earnings												1,395,000,000						2,770,000,000							4,147,000,000
Capital expenditures - network and other												1,270,000,000						2,840,000,000							3,753,000,000
Assets														38,297,000,000											38,297,000,000
Other nonrecurring (income) expense																									-4,000,000
Contra Revenue																									21,000,000
Cost of services and products, nonrecurring																									17,000,000
Predecessor [Member] | Wireline [Member]
Segment Reporting Information [Line Items]
Net operating revenues												702,000,000						1,471,000,000							2,999,000,000
Inter-segment revenues												893,000,000						1,901,000,000							3,881,000,000
Total segment operating expenses												-765,000,000						-1,629,000,000							-3,232,000,000
Segment earnings												128,000,000						272,000,000							649,000,000
Capital expenditures - network and other												64,000,000						174,000,000							240,000,000
Assets														2,195,000,000											2,195,000,000
Cost of services and products, nonrecurring																									3,000,000
Predecessor [Member] | Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Net operating revenues												2,000,000						6,000,000							12,000,000
Inter-segment revenues												-189,000,000	[3]					-424,000,000	[3]						-870,000,000	[3]
Total segment operating expenses												190,000,000						425,000,000							877,000,000
Segment earnings												1,000,000						1,000,000							7,000,000
Capital expenditures - network and other												47,000,000						126,000,000							268,000,000
Assets														11,078,000,000											11,078,000,000
Predecessor [Member] | Lease [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Restructuring charges												-8,000,000	[8]					-478,000,000	[8]						-196,000,000
Intersegment Eliminations [Member] | Successor [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues	0	[9]					0	[9]				0	[9]	0	[9]					0	[9]
Intersegment Eliminations [Member] | Successor [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues	0	[9]					0	[9]				0	[9]	0	[9]					0	[9]
Intersegment Eliminations [Member] | Successor [Member] | Wireline [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues	623,000,000	[9]					153,000,000	[9]				0	[9]	0	[9]					396,000,000	[9]
Intersegment Eliminations [Member] | Successor [Member] | Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues	-623,000,000	[9]					-153,000,000	[9]				0	[9]	0	[9]					-396,000,000	[9]
Intersegment Eliminations [Member] | Predecessor [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues												0	[9]					0	[9]						0	[9]
Intersegment Eliminations [Member] | Predecessor [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues												0	[9]					0	[9]						0	[9]
Intersegment Eliminations [Member] | Predecessor [Member] | Wireline [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues												191,000,000	[9]					430,000,000	[9]						882,000,000	[9]
Intersegment Eliminations [Member] | Predecessor [Member] | Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues												-191,000,000	[9]					-430,000,000	[9]						-882,000,000	[9]
Equity in losses of unconsolidated investments, net																									-1,114,000,000
Trademarks [Member] | Successor [Member]
Segment Reporting Information [Line Items]
Impairment of intangible assets, indefinite-lived (excluding goodwill)	1,900,000,000	[10]
Trademarks [Member] | Successor [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Impairment of intangible assets, indefinite-lived (excluding goodwill)				$1,900,000,000
[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]	(3)Other, net for the Successor year ended March 31, 2015 consists of $304 million of severance and exit costs, combined with $91 million for legal reserves related to various pending legal suits and proceedings and $59 million for a partial pension settlement, partially offset by a $41 million release of liability reserves associated with the May 2013 U.S. Cellular asset acquisition. Other, net for the Successor three-month transition period ended March 31, 2014 consists of $52 million of severance and exit costs. 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 and unaudited three-month period ended March 31, 2013 consists of $652 million and $25 million, respectively, of severance and exit costs, partially offset by $22 million of favorable developments in connection with an E911 regulatory tax-related contingency. Other, net for the Predecessor 191-day period ended July 10, 2013 also includes $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). Other, net for the Predecessor year ended December 31, 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 $196 million of lease exit costs.
[3]	(1)Revenues eliminated in consolidation consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.
[4]	(1)In addition to the $41 million gain (Wireless only) related to U.S. Cellular recognized, we recognized costs of $13 million ($12 million Wireless and $1 million Wireline) for the year ended March 31, 2015.
[5]	(4)For the three-month transition period ended March 31, 2014, we recognized costs of $11 million (solely attributable to Wireless).
[6]	(8)For the year ended December 31, 2013, we recognized costs of $56 million ($54 million Wireless, $2 million Wireline).
[7]	(4)Includes $45 million of hurricane-related charges for the Predecessor year ended December 31, 2012, which are classified in our consolidated statements of operations as follows: $21 million as contra-revenue in net operating revenues of Wireless, $20 million as cost of services ($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.
[8]	(11)For the 191-day period ended July 10, 2013, we recognized net costs of $478 million (solely attributable to our Wireless segment). For the unaudited three-month period ended March 31, 2013, we recognized net costs of $8 million (solely attributable to our Wireless segment).
[9]	(1)Inter-segment revenues consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.
[10]	Net reduction to trademarks for the year ended March 31, 2015 of approximately $1.9 billion was related to the impairment of the Sprint trade name. See discussion below.

Segments_Operating_Revenues_by

Segments (Operating Revenues by Service and Products) (Details) (USD $)	3 Months Ended												6 Months Ended		12 Months Ended				0 Months Ended	12 Months Ended
	Mar. 31, 2015	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, 2012	Jul. 10, 2013		Mar. 31, 2015		Dec. 31, 2013		Jul. 10, 2013	Dec. 31, 2012
Successor [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues	$8,292,000,000	$8,973,000,000	$8,488,000,000	$8,789,000,000	$8,875,000,000		$9,142,000,000	$7,749,000,000	$0	$0		$0			$34,532,000,000		$16,891,000,000
Net operating revenues					8,875,000,000					0		0	16,891,000,000		34,532,000,000		16,891,000,000
Successor [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net operating revenues					7,096,000,000										26,544,000,000		13,579,000,000
Successor [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Net operating revenues					999,000,000								1,797,000,000		4,990,000,000
Successor [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Net operating revenues					264,000,000								479,000,000		809,000,000
Successor [Member] | Data [Member]
Segment Reporting Information [Line Items]
Net operating revenues					36,000,000								69,000,000		125,000,000
Successor [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Net operating revenues					308,000,000								666,000,000		1,188,000,000
Successor [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Net operating revenues					172,000,000								301,000,000		876,000,000
Successor [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					8,254,000,000										32,327,000,000		15,642,000,000
Net operating revenues					8,254,000,000					0		0			32,327,000,000		15,642,000,000
Successor [Member] | Wireless [Member] | Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					7,096,000,000										26,544,000,000		13,579,000,000
Successor [Member] | Wireless [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					999,000,000										4,990,000,000		1,797,000,000
Successor [Member] | Wireless [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					0										0		0
Successor [Member] | Wireless [Member] | Data [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					0										0		0
Successor [Member] | Wireless [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					0										0		0
Successor [Member] | Wireless [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					159,000,000										793,000,000		266,000,000
Successor [Member] | Wireline [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					770,000,000								1,636,000,000		2,814,000,000
Net operating revenues					617,000,000					0		0			2,191,000,000		1,240,000,000
Successor [Member] | Wireline [Member] | Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					0										0		0
Successor [Member] | Wireline [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					0								0		0
Successor [Member] | Wireline [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					352,000,000								719,000,000		1,174,000,000
Successor [Member] | Wireline [Member] | Data [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					62,000,000								138,000,000		213,000,000
Successor [Member] | Wireline [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					345,000,000								747,000,000		1,353,000,000
Successor [Member] | Wireline [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					11,000,000								32,000,000		74,000,000
Successor [Member] | Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					-149,000,000	[1]							-387,000,000	[1]	-609,000,000	[1]
Net operating revenues					4,000,000					0		0			14,000,000		9,000,000
Successor [Member] | Corporate, Other And Eliminations [Member] | Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					0	[1]									0		0	[1]
Successor [Member] | Corporate, Other And Eliminations [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					0	[1]							0	[1]	0
Successor [Member] | Corporate, Other And Eliminations [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					-88,000,000	[1]							-240,000,000	[1]	-365,000,000
Successor [Member] | Corporate, Other And Eliminations [Member] | Data [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					-26,000,000	[1]							-69,000,000	[1]	-88,000,000
Successor [Member] | Corporate, Other And Eliminations [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					-37,000,000	[1]							-81,000,000	[1]	-165,000,000
Successor [Member] | Corporate, Other And Eliminations [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues					2,000,000	[1]							3,000,000	[1]	9,000,000
Predecessor [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues								8,877,000,000		8,793,000,000			18,602,000,000						932,000,000	35,345,000,000
Net operating revenues										8,793,000,000			18,602,000,000							35,366,000,000
Predecessor [Member] | Services [Member]
Segment Reporting Information [Line Items]
Net operating revenues										7,143,000,000			15,139,000,000							28,624,000,000	[2]
Predecessor [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Net operating revenues										813,000,000			1,707,000,000							3,248,000,000
Predecessor [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Net operating revenues										253,000,000			535,000,000							1,112,000,000
Predecessor [Member] | Data [Member]
Segment Reporting Information [Line Items]
Net operating revenues										48,000,000			95,000,000							222,000,000
Predecessor [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Net operating revenues										387,000,000			813,000,000							1,591,000,000
Predecessor [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Net operating revenues										149,000,000			313,000,000							569,000,000
Predecessor [Member] | Wireless [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										8,089,000,000			17,125,000,000							32,355,000,000
Net operating revenues										8,089,000,000			17,125,000,000							32,355,000,000
Predecessor [Member] | Wireless [Member] | Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										7,143,000,000			15,139,000,000							28,624,000,000	[2]
Predecessor [Member] | Wireless [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										813,000,000			1,707,000,000							3,248,000,000
Predecessor [Member] | Wireless [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										0			0							0
Predecessor [Member] | Wireless [Member] | Data [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										0			0							0
Predecessor [Member] | Wireless [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										0			0							0
Predecessor [Member] | Wireless [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										133,000,000			279,000,000							483,000,000
Predecessor [Member] | Wireline [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										893,000,000			1,901,000,000							3,881,000,000
Net operating revenues										702,000,000			1,471,000,000							2,999,000,000
Predecessor [Member] | Wireline [Member] | Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										0			0							0	[2]
Predecessor [Member] | Wireline [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										0			0							0
Predecessor [Member] | Wireline [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										352,000,000			771,000,000							1,627,000,000
Predecessor [Member] | Wireline [Member] | Data [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										94,000,000			188,000,000							398,000,000
Predecessor [Member] | Wireline [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										434,000,000			913,000,000							1,781,000,000
Predecessor [Member] | Wireline [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										13,000,000			29,000,000							75,000,000
Predecessor [Member] | Corporate, Other And Eliminations [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										-189,000,000	[1]		-424,000,000	[1]						-870,000,000	[1]
Net operating revenues										2,000,000			6,000,000							12,000,000
Predecessor [Member] | Corporate, Other And Eliminations [Member] | Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										0	[1]		0	[1]						0	[1],[2]
Predecessor [Member] | Corporate, Other And Eliminations [Member] | Equipment [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										0	[1]		0	[1]						0	[1]
Predecessor [Member] | Corporate, Other And Eliminations [Member] | Voice [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										-99,000,000	[1]		-236,000,000	[1]						-515,000,000	[1]
Predecessor [Member] | Corporate, Other And Eliminations [Member] | Data [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										-46,000,000	[1]		-93,000,000	[1]						-176,000,000	[1]
Predecessor [Member] | Corporate, Other And Eliminations [Member] | Internet [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										-47,000,000	[1]		-100,000,000	[1]						-190,000,000	[1]
Predecessor [Member] | Corporate, Other And Eliminations [Member] | Other Products or Services [Member]
Segment Reporting Information [Line Items]
Inter-segment revenues										$3,000,000	[1]		$5,000,000	[1]						$11,000,000	[1]
[1]	(1)Revenues eliminated in consolidation consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.
[2]	(2)Wireless services related to the Wireless segment for the Predecessor year ended December 31, 2012 excludes $21 million of hurricane-related contra-revenue charges reflected in net operating revenues in our consolidated statements of operations.

Quarterly_Financial_Data_Unaud2

Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended																		12 Months Ended		0 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2015		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, 2012	Mar. 31, 2015	Dec. 31, 2013	Jul. 10, 2013		Jul. 10, 2013	Dec. 31, 2012
Successor [Member]
Quarterly Financial Data [Line Items]
Revenues	$8,292,000,000		$8,973,000,000		$8,488,000,000		$8,789,000,000		$8,875,000,000	$9,142,000,000		$7,749,000,000		$0		$0		$0	$34,532,000,000	$16,891,000,000
Operating income (loss)	318,000,000		-2,540,000,000		-192,000,000		519,000,000		420,000,000	-576,000,000		-358,000,000		-22,000,000		-14,000,000		-33,000,000	-1,895,000,000	-970,000,000
Net loss	-224,000,000		-2,379,000,000		-765,000,000		23,000,000		-151,000,000	-1,038,000,000		-699,000,000		-114,000,000		-9,000,000		-27,000,000	-3,345,000,000	-1,860,000,000
Basic and diluted net loss per common share	$0	[1]	($1)	[1]	$0	[1]	$0.01	[1]	($0.04)	($0.26)	[1]	($0.18)	[1]	$0	[1]	$0	[1]		($1)	($0.54)
Predecessor [Member]
Quarterly Financial Data [Line Items]
Revenues												8,877,000,000				8,793,000,000					932,000,000		18,602,000,000	35,345,000,000
Operating income (loss)												874,000,000				29,000,000					-40,000,000		-885,000,000	-1,820,000,000
Net loss												($1,597,000,000)				($643,000,000)					$1,082,000,000		($1,158,000,000)	($4,326,000,000)
Basic and diluted net loss per common share																($0.21)							($0.38)	($1.44)
Basic (loss) income per common share												($0.53)	[1]			($0.21)	[1]				$0.35	[1]
Diluted (loss) income per common share												$0	[1]			$0	[1]				$0.30	[1]
[1]	(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.

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended		6 Months Ended	12 Months Ended		6 Months Ended	3 Months Ended			12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jul. 09, 2013	Mar. 31, 2013	Jul. 10, 2013	Dec. 31, 2012		Jul. 09, 2013	Mar. 31, 2014		Dec. 31, 2012	Mar. 31, 2015		Dec. 31, 2013	Jul. 08, 2013	Oct. 31, 2014
Clearwire [Member]
Related Party Transaction [Line Items]
Equity method investments													$325
Predecessor [Member]
Related Party Transaction [Line Items]
Equity in losses of unconsolidated investments, net	-482	-202	-482	-1,114
Derivative instruments not designated as hedging instruments, gain (loss), net	65
Impairments		0	0	102	[1]
Gain on previously-held equity interests		0	2,926	0
Related party transaction, amounts of transaction	207	101		417
Predecessor [Member] | Clearwire [Member]
Related Party Transaction [Line Items]
Equity method investment, other than temporary impairment				204
Impairments				41
Gain on previously-held equity interests						2,900
Successor [Member]
Related Party Transaction [Line Items]
Equity in losses of unconsolidated investments, net		0					0		0	0		0
Impairments		0					75	[1]	0	2,133	[1]	0
Gain on previously-held equity interests		0					0		0	0		0
Non-Controlling Economic Interest [Member] | Clearwire Corporation [Member]
Related Party Transaction [Line Items]
Equity method investment, ownership percentage													6.00%
Non-Controlling Economic Interest [Member] | Clearwire Communications LLC [Member]
Related Party Transaction [Line Items]
Equity method investment, ownership percentage													44.10%
Clearwire Acquisition [Member] | Clearwire [Member]
Related Party Transaction [Line Items]
Business acquisition, share price	$5					$5
Business acquisition, estimated control premium	$0.60					$0.60
Clearwire Acquisition [Member] | Non-Controlling Economic Interest [Member]
Related Party Transaction [Line Items]
Equity method investment, ownership percentage													50.10%
Line of Credit [Member] | Brightstar [Member]
Related Party Transaction [Line Items]
Line of credit facility, maximum borrowing capacity														1,000
Inventories [Member] | Successor [Member]
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction							$411			$5,300		$86
[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.

Related_Party_Transactions_Inv

Related Party Transactions (Investee Summarized Income Statement Information) (Details) (Predecessor [Member], USD $)	6 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Jul. 09, 2013	Dec. 31, 2012
Predecessor [Member]
Related Party Transaction [Line Items]
Revenues	$666	$1,265
Operating expenses	-1,285	-2,644
Operating loss	-619	-1,379
Net loss from continuing operations before non-controlling interests	-1,102	-1,744
Net loss from discontinued operations before non-controlling interests	$0	($168)

Related_Party_Transactions_Bri

Related Party Transactions (Brightstar) (Details) (Successor [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Brightstar Subsidiary [Member]
Related Party Transaction [Line Items]
Accounts payable	$16		$205
Inventories, related party	410		266
Brightstar [Member]
Related Party Transaction [Line Items]
Accounts receivable	430		0
Accounts payable	96		0
Revenue from related parties	1,818	[1]
Related party costs	$1,887	[1]
[1]	(1)Amounts for all other reported periods were immaterial.

Guarantor_Financial_Informatio2

Guarantor Financial Information (Details) (USD $)	Mar. 31, 2015	16-May-14	Feb. 24, 2015	Sep. 11, 2013	Dec. 12, 2013
In Billions, unless otherwise specified
Condensed Financial Statements, Captions [Line Items]
Ratio of total indebtedness to adjusted EBITDA	2.5
Accounts Receivable [Member]
Condensed Financial Statements, Captions [Line Items]
Maximum funding limit		$1.30
Sprint Communications Inc. Guaranteed Notes due 2021 [Member] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Debt instrument, face amount			1.5	2.25
Debt instrument, interest rate, stated percentage			7.63%	7.25%
Sprint Corporation 7.875% [Member] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Debt instrument, face amount				4.25
Debt instrument, interest rate, stated percentage				7.88%
Sprint Corporation 7.125% [Member] [Member] | Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Debt instrument, face amount					$2.50
Debt instrument, interest rate, stated percentage					7.13%

Guarantor_Financial_Informatio3

Guarantor Financial Information (CONDENSED CONSOLIDATING BALANCE SHEET) (Details) (Successor [Member], USD $)	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012		Oct. 05, 2012
In Millions, unless otherwise specified
Current assets
Cash and cash equivalents, beginning of period	$4,010		$4,970		$6,364	$3	$5		$0
Short-term investments	166		1,220
Accounts and notes receivable, net	2,290		3,607
Device and accessory inventory	1,359		982
Current deferred tax asset	62		128
Prepaid expenses and other current assets	1,890		672
Total current assets	9,777		11,579
Investment in subsidiaries	0		0
Property, plant and equipment, net	19,721		16,299
Due from consolidated affiliate	0		0
Note receivable from consolidated affiliate	0		0
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	6,575		6,383		6,434
FCC licenses and other	39,987		41,978
Definite-lived intangible assets, net	5,893		7,558
Other assets	1,077		892
Total assets	83,030		84,689		86,095	3,122	3,115
Current liabilities
Accounts payable	4,347	[1]	3,163	[1]
Accrued expenses and other current liabilities	5,293		5,544
Current portion of long-term debt, financing and capital lease obligations	1,300		991
Total current liabilities	10,940		9,698
Long-term debt, financing and capital lease obligations	32,531		31,787
Deferred tax liabilities	13,898		14,207
Note due to consolidated affiliate	0		0
Other liabilities	3,951		3,685
Due to consolidated affiliate	0		0
Total liabilities	61,320		59,377
Commitments and contingencies
Total stockholders' equity	21,710		25,312		25,584		3,110	[2]	0	[2]
Total liabilities and stockholders' equity	83,030		84,689
Parent [Member]
Current assets
Cash and cash equivalents, beginning of period	0		0		0		5
Short-term investments	0		0
Accounts and notes receivable, net	84		74
Device and accessory inventory	0		0
Current deferred tax asset	0		0
Prepaid expenses and other current assets	0		0
Total current assets	84		74
Investment in subsidiaries	21,712		25,316
Property, plant and equipment, net	0		0
Due from consolidated affiliate	68		0
Note receivable from consolidated affiliate	10,500		9,000
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	0		0
FCC licenses and other	0		0
Definite-lived intangible assets, net	0		0
Other assets	139		133
Total assets	32,503		34,523
Current liabilities
Accounts payable	0		0
Accrued expenses and other current liabilities	154		78
Current portion of long-term debt, financing and capital lease obligations	0		0
Total current liabilities	154		78
Long-term debt, financing and capital lease obligations	10,500		9,000
Deferred tax liabilities	0		0
Note due to consolidated affiliate	0		0
Other liabilities	0		0
Due to consolidated affiliate	139		133
Total liabilities	10,793		9,211
Total stockholders' equity	21,710		25,312
Total liabilities and stockholders' equity	32,503		34,523
Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents, beginning of period	3,492		4,125		5,665		0
Short-term investments	146		1,220
Accounts and notes receivable, net	157		27
Device and accessory inventory	0		0
Current deferred tax asset	0		0
Prepaid expenses and other current assets	13		14
Total current assets	3,808		5,386
Investment in subsidiaries	22,413		25,588
Property, plant and equipment, net	0		0
Due from consolidated affiliate	20,934		18,234
Note receivable from consolidated affiliate	458		0
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	0		0
FCC licenses and other	0		0
Definite-lived intangible assets, net	0		0
Other assets	1,260		1,237
Total assets	48,873		50,445
Current liabilities
Accounts payable	0		0
Accrued expenses and other current liabilities	625		493
Current portion of long-term debt, financing and capital lease obligations	500		0
Total current liabilities	1,125		493
Long-term debt, financing and capital lease obligations	14,576		15,027
Deferred tax liabilities	0		0
Note due to consolidated affiliate	10,500		9,000
Other liabilities	960		609
Due to consolidated affiliate	0		0
Total liabilities	27,161		25,129
Total stockholders' equity	21,712		25,316
Total liabilities and stockholders' equity	48,873		50,445
Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents, beginning of period	518		845		699		0
Short-term investments	20		0
Accounts and notes receivable, net	2,160		3,607
Device and accessory inventory	1,359		982
Current deferred tax asset	62		128
Prepaid expenses and other current assets	1,877		658
Total current assets	5,996		6,220
Investment in subsidiaries	0		0
Property, plant and equipment, net	19,721		16,299
Due from consolidated affiliate	0		0
Note receivable from consolidated affiliate	0		0
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	6,575		6,383
FCC licenses and other	39,987		41,978
Definite-lived intangible assets, net	5,893		7,558
Other assets	836		674
Total assets	79,008		79,112
Current liabilities
Accounts payable	4,347		3,163
Accrued expenses and other current liabilities	4,625		5,074
Current portion of long-term debt, financing and capital lease obligations	800		991
Total current liabilities	9,772		9,228
Long-term debt, financing and capital lease obligations	8,474		8,779
Deferred tax liabilities	13,898		14,207
Note due to consolidated affiliate	458		0
Other liabilities	2,991		3,076
Due to consolidated affiliate	21,002		18,234
Total liabilities	56,595		53,524
Total stockholders' equity	22,413		25,588
Total liabilities and stockholders' equity	79,008		79,112
Consolidation, Eliminations [Member]
Current assets
Cash and cash equivalents, beginning of period	0		0		0		0
Short-term investments	0		0
Accounts and notes receivable, net	-111		-101
Device and accessory inventory	0		0
Current deferred tax asset	0		0
Prepaid expenses and other current assets	0		0
Total current assets	-111		-101
Investment in subsidiaries	-44,125		-50,904
Property, plant and equipment, net	0		0
Due from consolidated affiliate	-21,002		-18,234
Note receivable from consolidated affiliate	-10,958		-9,000
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	0		0
FCC licenses and other	0		0
Definite-lived intangible assets, net	0		0
Other assets	-1,158		-1,152
Total assets	-77,354		-79,391
Current liabilities
Accounts payable	0		0
Accrued expenses and other current liabilities	-111		-101
Current portion of long-term debt, financing and capital lease obligations	0		0
Total current liabilities	-111		-101
Long-term debt, financing and capital lease obligations	-1,019		-1,019
Deferred tax liabilities	0		0
Note due to consolidated affiliate	-10,958		-9,000
Other liabilities	0		0
Due to consolidated affiliate	-21,141		-18,367
Total liabilities	-33,229		-28,487
Total stockholders' equity	-44,125		-50,904
Total liabilities and stockholders' equity	($77,354)		($79,391)
[1]	Includes liabilities in the amounts of $90 million and $91 million as of March 31, 2015 and 2014, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.
[2]	(1)For the Successor period beginning October 5, 2012 and ending December 31, 2012, there were approximately 3 million shares of Class B common stock of Starburst II, Inc. issued and outstanding with an immaterial value. These shares were exchanged in connection with the issuance of common stock to SoftBank upon completion of the Merger.

Guarantor_Financial_Informatio4

Guarantor Financial Information (CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS)) (Details) (USD $)	6 Months Ended	3 Months Ended											12 Months Ended			0 Months Ended	3 Months Ended	12 Months Ended
	Jul. 10, 2013	Mar. 31, 2015	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, 2012	Mar. 31, 2015		Dec. 31, 2013	Jul. 10, 2013	Jul. 09, 2013	Dec. 31, 2012
Other (expense) income:
Income tax benefit (expense)	($1,600,000,000)
Successor [Member]
Condensed Income Statements, Captions [Line Items]
Service						7,876,000,000					0	0	29,542,000,000		15,094,000,000
Equipment						999,000,000					0	0	4,990,000,000		1,797,000,000
Revenues		8,292,000,000	8,973,000,000	8,488,000,000	8,789,000,000	8,875,000,000		9,142,000,000	7,749,000,000	0	0	0	34,532,000,000		16,891,000,000
Cost of services (exclusive of depreciation and amortization below)						2,622,000,000					0	0	9,660,000,000		5,174,000,000
Cost of products (exclusive of depreciation and amortization below)						2,038,000,000					0	0	9,309,000,000		4,603,000,000
Net operating expenses:
Selling, general and administrative						2,371,000,000					14,000,000	33,000,000	9,563,000,000		4,841,000,000
Severance, exit costs and asset impairments						52,000,000							304,000,000
Depreciation						868,000,000					0	0	3,797,000,000		2,026,000,000
Amortization						429,000,000					0	0	1,552,000,000		908,000,000
Total costs and expenses						8,455,000,000					14,000,000	33,000,000	36,427,000,000		17,861,000,000
Operating (loss) income		318,000,000	-2,540,000,000	-192,000,000	519,000,000	420,000,000		-576,000,000	-358,000,000	-22,000,000	-14,000,000	-33,000,000	-1,895,000,000		-970,000,000
Other (expense) income:
Interest and Other Income						4,000,000							12,000,000		35,000,000
Interest Expense						-516,000,000					0	0	-2,051,000,000		-918,000,000
Equity in losses of unconsolidated investments, net						0					0	0	0		0
Gain on previously-held equity interests						0					0	0	0		0
(Losses) earnings of subsidiaries						0							0		0
Other nonoperating income (expense), excluding interest income						-3,000,000							15,000,000		38,000,000
Nonoperating income (expense)						-515,000,000					6,000,000	10,000,000	-2,024,000,000		-845,000,000
Income (loss) before income taxes						-95,000,000					-8,000,000	-23,000,000	-3,919,000,000		-1,815,000,000
Income tax benefit (expense)						-56,000,000					-1,000,000	-4,000,000	574,000,000		-45,000,000
Net loss		-224,000,000	-2,379,000,000	-765,000,000	23,000,000	-151,000,000		-1,038,000,000	-699,000,000	-114,000,000	-9,000,000	-27,000,000	-3,345,000,000		-1,860,000,000
Other comprehensive (loss) income						-145,000,000					0	0	-365,000,000		102,000,000
Comprehensive (loss)						-296,000,000					-9,000,000	-27,000,000	-3,710,000,000		-1,758,000,000
Asset impairments						75,000,000	[1]				0	0	2,133,000,000	[1]	0
Severance and exit costs						52,000,000					0	0	304,000,000		309,000,000
Other income (expense), net						1,000,000					6,000,000	10,000,000	27,000,000		73,000,000
Other, net						0					0	0	109,000,000		0
Successor [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Service						0							0		0
Equipment						0							0		0
Revenues						0							0		0
Cost of services (exclusive of depreciation and amortization below)						0							0		0
Cost of products (exclusive of depreciation and amortization below)						0							0		0
Net operating expenses:
Selling, general and administrative						0							0		0
Depreciation						0							0		0
Amortization						0							0		0
Total costs and expenses						0							1,000,000		0
Operating (loss) income						0							-1,000,000		0
Other (expense) income:
Interest and Other Income						20,000,000							146,000,000		40,000,000
Interest Expense						-373,000,000							-1,521,000,000		-548,000,000
Equity in losses of unconsolidated investments, net													0
Gain on previously-held equity interests													0
(Losses) earnings of subsidiaries						199,000,000							-1,970,000,000		-1,320,000,000
Other nonoperating income (expense), excluding interest income						0							1,000,000		-3,000,000
Nonoperating income (expense)						-154,000,000							-3,344,000,000		-1,831,000,000
Income (loss) before income taxes						-154,000,000							-3,345,000,000		-1,831,000,000
Income tax benefit (expense)						0							0		0
Net loss						-154,000,000							-3,345,000,000		-1,831,000,000
Other comprehensive (loss) income						-145,000,000							-365,000,000		102,000,000
Comprehensive (loss)						-299,000,000							-3,710,000,000		-1,729,000,000
Asset impairments						0							0
Severance and exit costs						0							0		0
Other, net													1,000,000
Successor [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Service						7,876,000,000							29,542,000,000		15,094,000,000
Equipment						999,000,000							4,990,000,000		1,797,000,000
Revenues						8,875,000,000							34,532,000,000		16,891,000,000
Cost of services (exclusive of depreciation and amortization below)						2,622,000,000							9,660,000,000		5,174,000,000
Cost of products (exclusive of depreciation and amortization below)						2,038,000,000							9,309,000,000		4,603,000,000
Net operating expenses:
Selling, general and administrative						2,371,000,000							9,563,000,000		4,805,000,000
Depreciation						868,000,000							3,797,000,000		2,026,000,000
Amortization						429,000,000							1,552,000,000		908,000,000
Total costs and expenses						8,455,000,000							36,426,000,000		17,825,000,000
Operating (loss) income						420,000,000							-1,894,000,000		-934,000,000
Other (expense) income:
Interest and Other Income						4,000,000							3,000,000		6,000,000
Interest Expense						-166,000,000							-667,000,000		-407,000,000
Equity in losses of unconsolidated investments, net													0
Gain on previously-held equity interests													0
(Losses) earnings of subsidiaries						0							0		0
Other nonoperating income (expense), excluding interest income						-3,000,000							14,000,000		56,000,000
Nonoperating income (expense)						-165,000,000							-650,000,000		-345,000,000
Income (loss) before income taxes						255,000,000							-2,544,000,000		-1,279,000,000
Income tax benefit (expense)						-56,000,000							574,000,000		-41,000,000
Net loss						199,000,000							-1,970,000,000		-1,320,000,000
Other comprehensive (loss) income						-147,000,000							-355,000,000		93,000,000
Comprehensive (loss)						52,000,000							-2,325,000,000		-1,227,000,000
Asset impairments						75,000,000							2,133,000,000
Severance and exit costs						52,000,000							304,000,000		309,000,000
Other, net													108,000,000
Successor [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Service						0							0		0
Equipment						0							0		0
Revenues						0							0		0
Cost of services (exclusive of depreciation and amortization below)						0							0		0
Cost of products (exclusive of depreciation and amortization below)						0							0		0
Net operating expenses:
Selling, general and administrative						0							0		0
Depreciation						0							0		0
Amortization						0							0		0
Total costs and expenses						0							0		0
Operating (loss) income						0							0		0
Other (expense) income:
Interest and Other Income						-189,000,000							-824,000,000		-200,000,000
Interest Expense						189,000,000							824,000,000		200,000,000
Equity in losses of unconsolidated investments, net													0
Gain on previously-held equity interests													0
(Losses) earnings of subsidiaries						-45,000,000							5,315,000,000		3,151,000,000
Other nonoperating income (expense), excluding interest income						0							0		0
Nonoperating income (expense)						-45,000,000							5,315,000,000		3,151,000,000
Income (loss) before income taxes						-45,000,000							5,315,000,000		3,151,000,000
Income tax benefit (expense)						0							0		0
Net loss						-45,000,000							5,315,000,000		3,151,000,000
Other comprehensive (loss) income						292,000,000							720,000,000		-195,000,000
Comprehensive (loss)						247,000,000							6,035,000,000		2,956,000,000
Asset impairments						0							0
Severance and exit costs						0							0		0
Other, net													0
Successor [Member] | Parent [Member]
Condensed Income Statements, Captions [Line Items]
Service						0							0		0
Equipment						0							0		0
Revenues						0							0		0
Cost of services (exclusive of depreciation and amortization below)						0							0		0
Cost of products (exclusive of depreciation and amortization below)						0							0		0
Net operating expenses:
Selling, general and administrative						0							0		36,000,000
Depreciation						0							0		0
Amortization						0							0		0
Total costs and expenses						0							0		36,000,000
Operating (loss) income						0							0		-36,000,000
Other (expense) income:
Interest and Other Income						169,000,000							687,000,000		189,000,000
Interest Expense						-166,000,000							-687,000,000		-163,000,000
Equity in losses of unconsolidated investments, net													0
Gain on previously-held equity interests													0
(Losses) earnings of subsidiaries						-154,000,000							-3,345,000,000		-1,831,000,000
Other nonoperating income (expense), excluding interest income						0							0		-15,000,000
Nonoperating income (expense)						-151,000,000							-3,345,000,000		-1,820,000,000
Income (loss) before income taxes						-151,000,000							-3,345,000,000		-1,856,000,000
Income tax benefit (expense)						0							0		-4,000,000
Net loss						-151,000,000							-3,345,000,000		-1,860,000,000
Other comprehensive (loss) income						-145,000,000							-365,000,000		102,000,000
Comprehensive (loss)						-296,000,000							-3,710,000,000		-1,758,000,000
Asset impairments						0							0
Severance and exit costs						0							0		0
Other, net													0
Predecessor [Member]
Condensed Income Statements, Captions [Line Items]
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
Revenues	18,602,000,000								8,877,000,000		8,793,000,000					932,000,000		35,345,000,000
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
Net operating expenses:
Selling, general and administrative	5,067,000,000										2,336,000,000							9,765,000,000
Severance, exit costs and asset impairments											25,000,000
Depreciation	3,098,000,000										1,422,000,000							6,240,000,000
Amortization	147,000,000										70,000,000							303,000,000
Total costs and expenses	19,487,000,000										8,764,000,000							37,165,000,000
Operating (loss) income	-885,000,000								874,000,000		29,000,000					-40,000,000		-1,820,000,000
Other (expense) income:
Interest and Other Income	33,000,000										14,000,000							65,000,000
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						-482,000,000	-1,114,000,000
Gain on previously-held equity interests	2,926,000,000										0							0
(Losses) earnings of subsidiaries	0										0							0
Other nonoperating income (expense), excluding interest income	-14,000,000										-14,000,000							125,000,000
Nonoperating income (expense)	1,328,000,000										-634,000,000							-2,352,000,000
Income (loss) 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								-1,597,000,000		-643,000,000					1,082,000,000		-4,326,000,000
Other comprehensive (loss) income	23,000,000										14,000,000							-341,000,000
Comprehensive (loss)	-1,135,000,000										-629,000,000							-4,667,000,000
Asset impairments	0										0							102,000,000	[1]
Severance and exit costs	652,000,000										25,000,000							196,000,000
Other income (expense), net	19,000,000										0							190,000,000
Other, net	-22,000,000										-22,000,000							-282,000,000
Predecessor [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Service	0										0							0
Equipment	0										0							0
Revenues	0										0							0
Cost of services (exclusive of depreciation and amortization below)	0										0							0
Cost of products (exclusive of depreciation and amortization below)	0										0							0
Net operating expenses:
Selling, general and administrative	0										0							0
Depreciation	0										0							0
Amortization	0										0							0
Total costs and expenses	0										0							0
Operating (loss) income	0										0							0
Other (expense) income:
Interest and Other Income	61,000,000										29,000,000							112,000,000
Interest Expense	-842,000,000										-292,000,000							-907,000,000
Equity in losses of unconsolidated investments, net	0										0							0
Gain on previously-held equity interests	0
(Losses) earnings of subsidiaries	-365,000,000										-368,000,000							-3,530,000,000
Other nonoperating income (expense), excluding interest income	-12,000,000										-12,000,000							-1,000,000
Nonoperating income (expense)	-1,158,000,000										-643,000,000							-4,326,000,000
Income (loss) before income taxes	-1,158,000,000										-643,000,000							-4,326,000,000
Income tax benefit (expense)	0										0							0
Net loss	-1,158,000,000										-643,000,000							-4,326,000,000
Other comprehensive (loss) income	23,000,000										14,000,000							-341,000,000
Comprehensive (loss)	-1,135,000,000										-629,000,000							-4,667,000,000
Asset impairments																		0
Severance and exit costs	0										0							0
Other, net	0										0							0
Predecessor [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
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
Revenues	18,602,000,000										8,793,000,000							35,345,000,000
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
Net operating expenses:
Selling, general and administrative	5,067,000,000										2,336,000,000							9,765,000,000
Depreciation	3,098,000,000										1,422,000,000							6,240,000,000
Amortization	147,000,000										70,000,000							303,000,000
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 and Other Income	15,000,000										6,000,000							34,000,000
Interest Expense	-336,000,000										-161,000,000							-602,000,000
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
(Losses) earnings of subsidiaries	0										0							0
Other nonoperating income (expense), excluding interest income	-2,000,000										-2,000,000							126,000,000
Nonoperating income (expense)	2,121,000,000										-359,000,000							-1,556,000,000
Income (loss) before income taxes	1,236,000,000										-330,000,000							-3,376,000,000
Income tax benefit (expense)	-1,601,000,000										-38,000,000							-154,000,000
Net loss	-365,000,000										-368,000,000							-3,530,000,000
Other comprehensive (loss) income	35,000,000										15,000,000							-339,000,000
Comprehensive (loss)	-330,000,000										-353,000,000							-3,869,000,000
Asset impairments																		102,000,000
Severance and exit costs	652,000,000										25,000,000							196,000,000
Other, net	-22,000,000										-22,000,000							-282,000,000
Predecessor [Member] | Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Service	0										0							0
Equipment	0										0							0
Revenues	0										0							0
Cost of services (exclusive of depreciation and amortization below)	0										0							0
Cost of products (exclusive of depreciation and amortization below)	0										0							0
Net operating expenses:
Selling, general and administrative	0										0							0
Depreciation	0										0							0
Amortization	0										0							0
Total costs and expenses	0										0							0
Operating (loss) income	0										0							0
Other (expense) income:
Interest and Other Income	-43,000,000										-21,000,000							-81,000,000
Interest Expense	43,000,000										21,000,000							81,000,000
Equity in losses of unconsolidated investments, net	0										0							0
Gain on previously-held equity interests	0
(Losses) earnings of subsidiaries	365,000,000										368,000,000							3,530,000,000
Other nonoperating income (expense), excluding interest income	0										0							0
Nonoperating income (expense)	365,000,000										368,000,000							3,530,000,000
Income (loss) before income taxes	365,000,000										368,000,000							3,530,000,000
Income tax benefit (expense)	0										0							0
Net loss	365,000,000										368,000,000							3,530,000,000
Other comprehensive (loss) income	-35,000,000										-15,000,000							339,000,000
Comprehensive (loss)	330,000,000										353,000,000							3,869,000,000
Asset impairments																		0
Severance and exit costs	0										0							0
Other, net	$0										$0							$0
[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.

Guarantor_Financial_Informatio5

Guarantor Financial Information (CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS) (Details) (USD $)	3 Months Ended		12 Months Ended		15 Months Ended	6 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2015	Dec. 31, 2013	Mar. 31, 2014	Jul. 10, 2013	Dec. 31, 2012
Successor [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$522	($2)	$2,450	($61)
Cash flows from investing activities:
Capital expenditures - network and other	-1,488	0	-5,422	-3,847	-1,488
Capital expenditures - leased devices	0	0	-582	0
Payments to Acquire Intangible Assets	-152	0	-163	-146
Reimbursements related to FCC licenses	0	0	-95	0
Acquisitions, net of cash acquired	0	0	0	-14,112
Investment in Clearwire (including debt securities)	0	0	0	0
Proceeds from sales and maturities of short-term investments	920	0	3,131	1,715
Purchases of short-term investments	-1,035	0	-2,077	-1,719
Increase (decrease) due from consolidated affiliate from investing activities	0		0	0
Payments to Acquire Businesses and Interest in Affiliates				0
Proceeds from sale of assets and FCC licenses	1	0	315	7
Payments for Advance to Affiliate			0	0
Other, net	-2	0	-11	-6
Net cash used in investing activities	-1,756	0	-4,714	-18,108
Cash flows from financing activities:
Proceeds from debt and financings	0	0	1,930	9,500
Repayments of debt, financing and capital lease obligations	-159	0	-574	-3,378
Debt financing costs	-1	0	-87	-147
Proceeds from issuance of common stock, net			35	18,567
Increase (decrease) due from/to consolidated affiliates from financing activities	0		0	0
Intercompany dividends paid to parent			0
Intercompany note advance from parent			0	0
Other, net	0	0	0	-14
Net cash provided by (used in) financing activities	-160	0	1,304	24,528
Proceeds from Contributions from Parent				0
Net (decrease) increase in cash and cash equivalents	-1,394	-2	-960	6,359
Cash and cash equivalents, beginning of period	6,364	5	4,970	5	5	5
Cash and cash equivalents, end of period	4,970	3	4,010	6,364	4,970		5
Successor [Member] | Parent [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	0		0	9
Cash flows from investing activities:
Capital expenditures - network and other	0		0	0
Capital expenditures - leased devices			0
Payments to Acquire Intangible Assets	0		0	0
Reimbursements related to FCC licenses			0
Acquisitions, net of cash acquired				-16,640
Proceeds from sales and maturities of short-term investments	0		0	0
Purchases of short-term investments	0		0	0
Increase (decrease) due from consolidated affiliate from investing activities	0		0	0
Payments to Acquire Businesses and Interest in Affiliates				-1,900
Proceeds from sale of assets and FCC licenses	0		0	0
Payments for Advance to Affiliate			-1,481	-8,861
Other, net	0		0	0
Net cash used in investing activities	0		-1,481	-27,401
Cash flows from financing activities:
Proceeds from debt and financings			1,500	9,000
Repayments of debt, financing and capital lease obligations	0		0	0
Debt financing costs	0		-21	-139
Proceeds from issuance of common stock, net			0	18,540
Increase (decrease) due from/to consolidated affiliates from financing activities	0		2	0
Intercompany dividends paid to parent			0
Intercompany note advance from parent			0	0
Other, net				-14
Net cash provided by (used in) financing activities	0		1,481	27,387
Proceeds from Contributions from Parent				0
Net (decrease) increase in cash and cash equivalents	0		0	-5
Cash and cash equivalents, beginning of period	0	5	0	5	5	5
Cash and cash equivalents, end of period	0		0	0	0
Successor [Member] | Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	-483		-750	-458
Cash flows from investing activities:
Capital expenditures - network and other	0		0	0
Capital expenditures - leased devices			0
Payments to Acquire Intangible Assets	0		0	0
Reimbursements related to FCC licenses			0
Acquisitions, net of cash acquired				2,528
Proceeds from sales and maturities of short-term investments	920		3,061	1,715
Purchases of short-term investments	-1,035		-1,987	-1,719
Increase (decrease) due from consolidated affiliate from investing activities	-941		-2,425	-7,189
Payments to Acquire Businesses and Interest in Affiliates				0
Proceeds from sale of assets and FCC licenses	0		0	0
Payments for Advance to Affiliate			-343	0
Other, net	0		0	0
Net cash used in investing activities	-1,056		-1,694	-4,665
Cash flows from financing activities:
Proceeds from debt and financings			300	0
Repayments of debt, financing and capital lease obligations	0		0	0
Debt financing costs	-1		-5	0
Proceeds from issuance of common stock, net			35	27
Increase (decrease) due from/to consolidated affiliates from financing activities	0		0	0
Intercompany dividends paid to parent			0
Intercompany note advance from parent			1,481	8,861
Other, net				0
Net cash provided by (used in) financing activities	-1		1,811	10,788
Proceeds from Contributions from Parent				1,900
Net (decrease) increase in cash and cash equivalents	-1,540		-633	5,665
Cash and cash equivalents, beginning of period	5,665	0	4,125	0	0	0
Cash and cash equivalents, end of period	4,125		3,492	5,665	4,125
Successor [Member] | Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	1,005		3,700	388
Cash flows from investing activities:
Capital expenditures - network and other	-1,488		-5,422	-3,847
Capital expenditures - leased devices			-582
Payments to Acquire Intangible Assets	-152		-163	-146
Reimbursements related to FCC licenses			-95
Acquisitions, net of cash acquired				0
Proceeds from sales and maturities of short-term investments	0		70	0
Purchases of short-term investments	0		-90	0
Increase (decrease) due from consolidated affiliate from investing activities	0		0	0
Payments to Acquire Businesses and Interest in Affiliates				0
Proceeds from sale of assets and FCC licenses	1		315	7
Payments for Advance to Affiliate			0	0
Other, net	-2		-11	-6
Net cash used in investing activities	-1,641		-5,788	-3,992
Cash flows from financing activities:
Proceeds from debt and financings			130	500
Repayments of debt, financing and capital lease obligations	-159		-574	-3,378
Debt financing costs	0		-61	-8
Proceeds from issuance of common stock, net			0	0
Increase (decrease) due from/to consolidated affiliates from financing activities	941		2,423	7,189
Intercompany dividends paid to parent			-500
Intercompany note advance from parent			343	0
Other, net				0
Net cash provided by (used in) financing activities	782		1,761	4,303
Proceeds from Contributions from Parent				0
Net (decrease) increase in cash and cash equivalents	146		-327	699
Cash and cash equivalents, beginning of period	699	0	845	0	0	0
Cash and cash equivalents, end of period	845		518	699	845
Successor [Member] | Consolidation, Eliminations [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	0		-500	0
Cash flows from investing activities:
Capital expenditures - network and other	0		0	0
Capital expenditures - leased devices			0
Payments to Acquire Intangible Assets	0		0	0
Reimbursements related to FCC licenses			0
Acquisitions, net of cash acquired				0
Proceeds from sales and maturities of short-term investments	0		0	0
Purchases of short-term investments	0		0	0
Increase (decrease) due from consolidated affiliate from investing activities	941		2,425	7,189
Payments to Acquire Businesses and Interest in Affiliates				1,900
Proceeds from sale of assets and FCC licenses	0		0	0
Payments for Advance to Affiliate			1,824	8,861
Other, net	0		0	0
Net cash used in investing activities	941		4,249	17,950
Cash flows from financing activities:
Proceeds from debt and financings			0	0
Repayments of debt, financing and capital lease obligations	0		0	0
Debt financing costs	0		0	0
Proceeds from issuance of common stock, net			0	0
Increase (decrease) due from/to consolidated affiliates from financing activities	-941		-2,425	-7,189
Intercompany dividends paid to parent			500
Intercompany note advance from parent			-1,824	-8,861
Other, net				0
Net cash provided by (used in) financing activities	-941		-3,749	-17,950
Proceeds from Contributions from Parent				-1,900
Net (decrease) increase in cash and cash equivalents	0		0	0
Cash and cash equivalents, beginning of period	0	0	0	0	0	0
Cash and cash equivalents, end of period	0		0	0	0
Predecessor [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities		940				2,671	2,999
Cash flows from investing activities:
Capital expenditures - network and other		-1,381				-3,140	-4,261
Capital expenditures - leased devices		0				0	0
Payments to Acquire Intangible Assets		-55				-125	-198
Reimbursements related to FCC licenses		0				0	0
Acquisitions, net of cash acquired		0				-4,039	0
Investment in Clearwire (including debt securities)		-80				-308	-228
Proceeds from sales and maturities of short-term investments		1,281				2,445	1,513
Purchases of short-term investments		-926				-1,221	-3,212
Increase (decrease) due from consolidated affiliate from investing activities		0				0	0
Proceeds from sale of assets and FCC licenses		6				10	19
Other, net		-3				-7	-8
Net cash used in investing activities		-1,158				-6,385	-6,375
Cash flows from financing activities:
Proceeds from debt and financings		204				204	9,176
Repayments of debt, financing and capital lease obligations		-59				-362	-4,791
Debt financing costs		-10				-11	-134
Proceeds from issuance of common stock, net		7				60	29
Increase (decrease) due from/to consolidated affiliates from financing activities		0				0	0
Other, net		0				0	0
Net cash provided by (used in) financing activities		142				-109	4,280
Net (decrease) increase in cash and cash equivalents		-76				-3,823	904
Cash and cash equivalents, beginning of period		6,351		6,351	6,351	6,351	5,447
Cash and cash equivalents, end of period		6,275				2,528	6,351
Predecessor [Member] | Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities		-210				-559	-728
Cash flows from investing activities:
Capital expenditures - network and other		0				0	0
Payments to Acquire Intangible Assets		0				0	0
Acquisitions, net of cash acquired						-4,039
Investment in Clearwire (including debt securities)		0				0	0
Proceeds from sales and maturities of short-term investments		1,281				2,445	1,513
Purchases of short-term investments		-926				-1,221	-3,212
Increase (decrease) due from consolidated affiliate from investing activities		-236				-372	-5,610
Proceeds from sale of assets and FCC licenses		0				0	0
Other, net		0				0	0
Net cash used in investing activities		119				-3,187	-7,309
Cash flows from financing activities:
Proceeds from debt and financings		0				0	8,880
Repayments of debt, financing and capital lease obligations		0				0	0
Debt financing costs		-10				-11	-105
Proceeds from issuance of common stock, net		7				60	29
Increase (decrease) due from/to consolidated affiliates from financing activities		0				0	0
Net cash provided by (used in) financing activities		-3				49	8,804
Net (decrease) increase in cash and cash equivalents		-94				-3,697	767
Cash and cash equivalents, beginning of period		5,218		5,218	5,218	5,218	4,451
Cash and cash equivalents, end of period		5,124				1,521	5,218
Predecessor [Member] | Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities		1,150				3,230	3,727
Cash flows from investing activities:
Capital expenditures - network and other		-1,381				-3,140	-4,261
Payments to Acquire Intangible Assets		-55				-125	-198
Acquisitions, net of cash acquired						0
Investment in Clearwire (including debt securities)		-80				-308	-228
Proceeds from sales and maturities of short-term investments		0				0	0
Purchases of short-term investments		0				0	0
Increase (decrease) due from consolidated affiliate from investing activities		0				0	0
Proceeds from sale of assets and FCC licenses		6				10	19
Other, net		-3				-7	-8
Net cash used in investing activities		-1,513				-3,570	-4,676
Cash flows from financing activities:
Proceeds from debt and financings		204				204	296
Repayments of debt, financing and capital lease obligations		-59				-362	-4,791
Debt financing costs		0				0	-29
Proceeds from issuance of common stock, net		0				0	0
Increase (decrease) due from/to consolidated affiliates from financing activities		236				372	5,610
Net cash provided by (used in) financing activities		381				214	1,086
Net (decrease) increase in cash and cash equivalents		18				-126	137
Cash and cash equivalents, beginning of period		1,133		1,133	1,133	1,133	996
Cash and cash equivalents, end of period		1,151				1,007	1,133
Predecessor [Member] | Consolidation, Eliminations [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities		0				0	0
Cash flows from investing activities:
Capital expenditures - network and other		0				0	0
Payments to Acquire Intangible Assets		0				0	0
Acquisitions, net of cash acquired						0
Investment in Clearwire (including debt securities)		0				0	0
Proceeds from sales and maturities of short-term investments		0				0	0
Purchases of short-term investments		0				0	0
Increase (decrease) due from consolidated affiliate from investing activities		236				372	5,610
Proceeds from sale of assets and FCC licenses		0				0	0
Other, net		0				0	0
Net cash used in investing activities		236				372	5,610
Cash flows from financing activities:
Proceeds from debt and financings		0				0	0
Repayments of debt, financing and capital lease obligations		0				0	0
Debt financing costs		0				0	0
Proceeds from issuance of common stock, net		0				0	0
Increase (decrease) due from/to consolidated affiliates from financing activities		-236				-372	-5,610
Net cash provided by (used in) financing activities		-236				-372	-5,610
Net (decrease) increase in cash and cash equivalents		0				0	0
Cash and cash equivalents, beginning of period		0		0	0	0	0
Cash and cash equivalents, end of period		$0				$0	$0