T-Mobile US (TMUS) 10-Q 31 Jul 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 28, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'T-MOBILE US, INC.	'
Trading Symbol	'TMUS	'
Entity Central Index Key	'0001283699	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	807,165,830

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$3,080	$5,891
Accounts receivable, net of deferred interest and allowances of $473 and $381	3,939	3,619
Accounts receivable from affiliates	87	41
Inventory	791	586
Current portion of deferred tax assets, net	820	839
Other current assets	1,179	1,252
Total current assets	9,896	12,228
Property and equipment, net of accumulated depreciation of $21,137 and $19,649	15,537	15,349
Goodwill	1,683	1,683
Spectrum licenses	21,828	18,122
Other intangible assets, net of accumulated amortization of $643 and $476	1,040	1,204
Other assets	1,680	1,367
Total assets	51,664	49,953
Current liabilities	'	'
Accounts payable and accrued liabilities	5,555	4,567
Current payables and short-term debt to affiliates	236	199
Short-term debt	272	244
Deferred revenue	447	445
Other current liabilities	621	353
Total current liabilities	7,131	5,808
Long-term debt to affiliates	5,600	5,600
Long-term debt	14,369	14,345
Long-term financial obligation	2,502	2,496
Deferred tax liabilities	4,757	4,645
Deferred rents	2,237	2,113
Other long-term liabilities	505	701
Total long-term liabilities	29,970	29,900
Commitments and contingencies	'	'
Stockholders' equity	'	'
Preferred stock, par value $0.00001 per share, 100,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, par value $0.00001 per share, 1,000,000,000 shares authorized; 808,508,529 and 803,262,309 shares issued, 807,126,024 and 801,879,804 shares outstanding	0	0
Additional paid-in capital	37,411	37,330
Treasury stock, at cost, 1,382,505 and 1,382,505 shares issued	0	0
Accumulated other comprehensive income	0	3
Accumulated deficit	-22,848	-23,088
Total stockholders' equity	14,563	14,245
Total liabilities and stockholders' equity	$51,664	$49,953

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Deferred interest and allowances	$473	$381
Accumulated depreciation	21,137	19,649
Accumulated amortization	$643	$476
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	808,508,529	803,262,309
Common stock, shares outstanding	807,126,024	801,879,804
Treasury stock, at cost, shares issued	1,382,505	1,382,505

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues	'	'	'	'
Branded postpaid revenues	$3,511	$3,284	$6,958	$6,547
Branded prepaid revenues	1,736	1,242	3,384	1,745
Wholesale revenues	172	143	346	293
Roaming and other service revenues	65	87	133	177
Total service revenues	5,484	4,756	10,821	8,762
Equipment sales	1,600	1,379	3,048	1,984
Other revenues	101	93	191	159
Total revenues	7,185	6,228	14,060	10,905
Operating expenses	'	'	'	'
Cost of services, exclusive of depreciation and amortization shown separately below	1,453	1,327	2,917	2,436
Cost of equipment sales	2,215	1,936	4,501	2,822
Selling, general and administrative	2,151	1,847	4,247	3,353
Depreciation and amortization	1,129	888	2,184	1,643
MetroPCS transaction and integration costs	22	26	34	39
Restructuring costs	0	23	0	54
Other, net	-747	0	-757	-2
Total operating expenses	6,223	6,047	13,126	10,345
Operating income	962	181	934	560
Interest expense to affiliates	-85	-225	-103	-403
Interest expense	-271	-109	-547	-160
Interest income	83	40	158	75
Other income (expense), net	-12	118	-18	112
Total other expense, net	-285	-176	-510	-376
Income before income taxes	677	5	424	184
Income tax expense	286	21	184	93
Net income (loss)	391	-16	240	91
Other comprehensive income (loss), net of tax	'	'	'	'
Net gain on cross currency interest rate swaps, net of tax effect of $0, $39, $0, and $13	0	66	0	23
Net loss on foreign currency translation, net of tax effect of $0, ($62), $0 and ($37)	0	-104	0	-62
Unrealized loss on available-for-sale securities, net of tax effect of $0, $0, ($1) and $0	0	0	-3	0
Other comprehensive loss, net of tax	0	-38	-3	-39
Total comprehensive income (loss)	$391	($54)	$237	$52
Earnings (loss) per share	'	'	'	'
Basic	$0.49	($0.02)	$0.30	$0.15
Diluted	$0.48	($0.02)	$0.30	$0.15
Weighted average shares outstanding	'	'	'	'
Basic	803,923,913	664,603,682	803,226,194	600,302,111
Diluted	813,556,137	664,603,682	812,903,135	601,694,911

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net gain on cross currency interest rate swaps, tax	$0	$39	$0	$13
Net loss on foreign currency translation, tax	0	-62	0	-37
Unrealized loss on available-for-sale securities, tax	$0	$0	($1)	$0

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities	'	'
Net cash provided by operating activities	$1,729	$1,715
Investing activities	'	'
Purchases of property and equipment	-1,887	-2,126
Purchases of spectrum licenses and other intangible assets	-2,367	-51
Short term affiliate loan receivable, net	0	300
Cash and cash equivalents acquired in MetroPCS business combination	0	2,144
Investments in unconsolidated affiliates, net	-20	0
Other, net	-1	-5
Net cash provided by (used in) investing activities	-4,275	262
Financing activities	'	'
Repayments of short-term debt for purchases of property and equipment	-231	0
Repayments related to a variable interest entity	0	-40
Distribution to affiliate	0	-41
Taxes paid related to net share settlement of stock awards	-72	0
Excess tax benefit from stock-based compensation	33	3
Proceeds from exercise of stock options	23	72
Other, net	-18	-3
Net cash used in financing activities	-265	-9
Change in cash and cash equivalents	-2,811	1,968
Cash and cash equivalents	'	'
Beginning of period	5,891	394
End of period	$3,080	$2,362

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Note 1 – Basis of Presentation
	The unaudited condensed consolidated financial statements of T-Mobile US, Inc. (“T-Mobile” or the “Company”) include all adjustments of a normal recurring nature necessary for the fair presentation of the results for the interim periods presented. The results for the interim periods are not necessarily indicative of those for the full year. The condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2013.
	The condensed consolidated financial statements include the balances and results of operations of T-Mobile and its consolidated subsidiaries. T-Mobile consolidates all majority-owned subsidiaries over which it exercises control, as well as variable interest entities (“VIE”) where it is deemed to be the primary beneficiary and VIEs which cannot be deconsolidated. Intercompany transactions and balances have been eliminated in consolidation.
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the financial statements and accompanying notes. Actual results could differ from those estimates.
	Recently Issued Accounting Standards
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers.” The standard requires entities to recognize revenue through the application of a five-step model, which includes identification of the contract, identification of the performance obligations, determination of the transaction price, allocation of the transaction price to the performance obligations, and recognition of revenue as the entity satisfies the performance obligations. The standard will become effective for T-Mobile beginning January 1, 2017. The Company is currently evaluating the guidance to determine the potential impact on T-Mobile’s financial condition, results of operations and cash flows, and financial statement disclosures.

Acquisitions_and_Other_Transac

Acquisitions and Other Transactions	6 Months Ended
	Jun. 30, 2014
Acquisitions and Other Transactions [Abstract]	'
Acquisitions and Other Transactions	'
	Note 2 – Acquisitions and Other Transactions
	Spectrum License Transactions
	In January 2014, T-Mobile entered into agreements with Verizon Communications Inc. (“Verizon”) for the acquisition of 700 MHz A-Block spectrum licenses for cash and the transfer of certain Advanced Wireless Service (“AWS”) and Personal Communications Service (“PCS”) spectrum licenses.  Upon closing of the transaction in April 2014, T-Mobile paid Verizon $2.4 billion in cash and transferred certain AWS and PCS spectrum licenses. T-Mobile recorded the 700 MHz A-Block spectrum licenses received at their fair value of $3.7 billion. In addition, T-Mobile recognized a non-cash gain of $517 million included in other, net for the three and six months ended June 30, 2014.
	In November 2013, the Company entered into an agreement with Verizon to exchange certain AWS and PCS spectrum licenses. Upon closing of the transaction in April 2014, T-Mobile transferred certain AWS and PCS spectrum licenses to Verizon.  T-Mobile recorded the AWS and PCS spectrum licenses received at their fair value of $792 million. In addition, T-Mobile recognized a non-cash gain of $214 million included in other, net for the three and six months ended June 30, 2014.
	Factoring Arrangement
	Transaction Overview
	In February 2014, T-Mobile entered into a two-year factoring arrangement to sell certain service accounts receivable on a revolving basis, subject to a maximum funding limit of $500 million. Sales of receivables occur daily and are settled on a monthly basis. The receivables consist of service charges currently due from customers and are short-term in nature. In connection with the factoring arrangement, the Company formed a wholly-owned subsidiary, which qualifies as a bankruptcy remote special purpose entity (“Factoring SPE”). Pursuant to the factoring arrangement, certain subsidiaries of T-Mobile transfer selected receivables to the Factoring SPE.  The Factoring SPE then sells the receivables to an unaffiliated entity (“Factoring VIE”), which was established to facilitate the sale of ownership interest in the receivables to certain third parties.
	Variable Interest Entity
	The Company determined the Factoring VIE is a VIE as it lacks sufficient equity to finance its activities. The Company has a variable interest in the Factoring VIE, but is not the primary beneficiary as it lacks the power to direct the activities that most significantly impact the Factoring VIE’s economic performance. As the Company has determined it is not the primary beneficiary and does not hold any equity interest, the results of the Factoring VIE are not consolidated into the Company’s condensed consolidated financial statements.
	Sales of Receivables
	The sales of receivables through the factoring arrangement are treated as sales of financial assets. Upon sale, T-Mobile derecognizes the receivables, as well as the related allowances, and recognizes the net proceeds in cash provided by operating activities.
	As of June 30, 2014, T-Mobile derecognized net receivables of $611 million through the factoring arrangement.  For the six months ended June 30, 2014, T-Mobile received net cash proceeds of $468 million. The proceeds were net of a receivable for the remainder of the purchase price (“deferred purchase price”), which is received from collections on the service receivables. The deferred purchase price is classified as a trading security and carried at fair value with unrealized gains and losses from changes in fair value included in selling, general and administrative expense. The fair value of the deferred purchase price was determined based on a discounted cash flow model which uses unobservable inputs (Level 3 inputs), including customer default rates. Due to the short-term nature of the underlying financial assets, the carrying value approximated fair value. As of June 30, 2014, other current assets related to the factoring arrangement, which were held by the Factoring SPE and primarily consisted of the deferred purchase price, were $236 million. In addition, T-Mobile recognized an obligation to the Factoring VIE primarily related to the timing of settlements for the sales of receivables through the factoring arrangement. As of June 30, 2014, accounts payable and accrued liabilities and other current liabilities related to the factoring arrangement, which were held by the Factoring SPE, were $101 million and $23 million, respectively.
	Net expenses resulting from the sales of receivables are recognized in selling, general and administrative expense. Prior to the sales of receivables, T-Mobile recognizes impairment charges, rather than bad debt expense, to reduce the receivables to fair value for estimated losses resulting from uncollectible balances. Net expenses also include any resulting gains or losses from the sales of receivables, unrealized gains and losses related to the deferred purchase price, and factoring fees. For the three and six months ended June 30, 2014, T-Mobile recognized net expenses of $77 million and $90 million, respectively.
	Continuing Involvement
	T-Mobile has continuing involvement with the sold receivables as it services the receivables and is required to repurchase certain receivables, including aged receivables and receivables where write-off is imminent, pursuant to the factoring arrangement. T-Mobile will continue to service the customer and their related receivables, including facilitating customer payment collection, in exchange for a monthly servicing fee. As the receivables are sold on a revolving basis, the customer payment collections are reinvested in new receivable sales. While servicing the receivables the same policies and procedures are applied to the sold receivables that apply to owned receivables, and T-Mobile continues to maintain normal relationships with its customers.
	In addition, T-Mobile has continuing involvement related to the sold receivables as it may be responsible for absorbing additional credit losses pursuant to the agreement. The Company’s maximum exposure to loss related to the involvement with the Factoring VIE was $440 million as of June 30, 2014. The maximum exposure to loss, which is required disclosure under GAAP, represents an estimated loss that would be incurred under severe, hypothetical circumstances whereby the Company would not receive the portion of the contractual proceeds withheld by the Factoring VIE and would also be required to repurchase the maximum amount of receivables pursuant to the agreement without consideration for any recovery.  As T-Mobile believes the probability of these circumstances occurring is very remote, the maximum exposure to loss is not an indication of the Company’s expected loss.
	Short-term Debt
	In June 2014, the Company entered into a handset financing arrangement with affiliates of Deutsche Bank AG which allows for up to $108 million in borrowings.  Under the arrangement, the Company can effectively extend payment terms for invoices payable to certain handset vendors.  The interest rate on the financing arrangement will be determined based on LIBOR plus a specified margin per the arrangement.  Obligations under the financing arrangement will be included in short-term debt.  As of June 30, 2014, there was no outstanding balance.
	Transaction with MetroPCS
	On April 30, 2013, the business combination involving T-Mobile USA, Inc. (“T-Mobile USA”) and MetroPCS Communications, Inc. (“MetroPCS”) was completed. In connection with the business combination, MetroPCS acquired all of the outstanding capital stock of T-Mobile USA beneficially owned by Deutsche Telekom AG (“Deutsche Telekom”) in consideration for the issuance of shares of common stock representing a majority of the fully diluted shares of the combined company. MetroPCS was subsequently renamed T-Mobile US, Inc. and is the consolidated parent of the Company’s subsidiaries, including T-Mobile USA. The business combination was accounted for as a reverse acquisition with T-Mobile USA as the accounting acquirer. Accordingly, T-Mobile USA’s historical financial statements became the historical financial statements of the combined company. The common shares outstanding and earnings (loss) per share presented for periods up to April 30, 2013 reflect the common shares issued to T-Mobile Global Holding GmbH, an indirect wholly-owned subsidiary of Deutsche Telekom, in connection with the reverse acquisition. Additionally, the acquired assets and liabilities of MetroPCS were included in the condensed consolidated balance sheets as of April 30, 2013 and the results of its operations and cash flows are included in the condensed consolidated statements of comprehensive income (loss) and cash flows for periods beginning after May 1, 2013.

Equipment_Installment_Plan_Rec

Equipment Installment Plan Receivables	6 Months Ended
	Jun. 30, 2014
Equipment Installment Plan Receivables [Abstract]	'
Equipment Installment Plan Receivables	'
	Note 3 – Equipment Installment Plan Receivables
	T-Mobile offers certain retail customers the option to pay for their devices and other purchases in installments over a period of up to 24 months using an Equipment Installment Plan (“EIP”). The carrying values of EIP receivables approximate fair value as the receivables are recorded at their present value, net of the deferred interest and additional allowance for credit losses. At the time of sale, the Company imputes interest, inclusive of credit risk, on the EIP receivables and records the deferred interest as a reduction to equipment sales and as an allowance against the related accounts receivable. Interest income is recognized over the financed installment term.
	The following table summarizes the EIP receivables:
	(in millions)	June 30,			December 31,
		2014			2013
	EIP receivables, gross	$	4,029		$	2,882
	Deferred interest	(320		)	(276		)
	EIP receivables, net of deferred interest	3,709			2,606
	Allowance for credit losses	(126		)	(60		)
	EIP receivables, net	$	3,583		$	2,546
	Classified on the balance sheet as:
	Accounts receivable, net	$	2,190		$	1,471
	Other assets	1,393			1,075
	EIP receivables, net	$	3,583		$	2,546
	Based upon customer credit profiles, T-Mobile classifies EIP receivables into the credit categories of “Prime” and “Subprime”. T-Mobile uses proprietary scoring systems that measure the credit quality of the EIP receivables using several factors, such as credit bureau information, consumer credit risk scores and service plan characteristics. Prime customer receivables are those with lower delinquency risk and Subprime customer receivables are those with higher delinquency risk. Customers within the Subprime category may be required to pay a significant down payment on their equipment purchases. In addition, certain customers within the Subprime category are required to pay an advance deposit.
	The balance and aging of the EIP receivables on a gross basis by credit category were as follows:
		June 30, 2014								December 31, 2013
	(in millions)	Prime			Subprime			Total		Prime		Subprime		Total
	Unbilled	$	2,058		$	1,798		$	3,856	$	1,482	$	1,270	$	2,752
	Billed - Current	59			60			119		45		45		90
	Billed - Past Due	20			34			54		15		25		40
	EIP receivables, gross	$	2,137		$	1,892		$	4,029	$	1,542	$	1,340	$	2,882
	EIP receivables for which invoices have not yet been generated for the customer are classified as Unbilled. EIP receivables for which invoices have been generated but which are not past the contractual due date are classified as Billed - Current. EIP receivables for which invoices have been generated and the payment is past the contractual due date are classified as Billed - Past Due.
	T-Mobile maintains an additional allowance for credit losses exceeding the credit risk recorded as deferred interest. The allowance is based on a number of factors, including collection experience, aging of the accounts receivable portfolio, credit quality of the customer base, and other qualitative factors such as macro-economic conditions. T-Mobile writes off account balances if collection efforts were unsuccessful and future collection is unlikely based on customer credit ratings and the length of time from the original billing date. Equipment sales that are not reasonably assured to be collectible are recorded on a cash basis as payments are received.
	Activity in the deferred interest and allowance for credit losses for the EIP receivables was as follows:
	(in millions)	June 30,
		2014
	Deferred interest and allowance for credit losses, beginning of period	$	336
	Bad debt expense	187
	Write-offs, net of recoveries	(121		)
	Change in deferred interest on short-term and long-term EIP receivables	44
	Deferred interest and allowance for credit losses, end of period	$	446
	Deferred interest and allowance for credit losses includes the long-term portion of deferred interest of $64 million as of June 30, 2014 and December 31, 2013, respectively.

Fair_Value_Measurements_and_De

Fair Value Measurements and Derivative Instruments	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements and Derivative Instruments	'
	Note 4 – Fair Value Measurements and Derivative Instruments
	Derivative Financial Instruments
	Embedded Derivatives
	In connection with the business combination with MetroPCS, T-Mobile issued senior reset notes to Deutsche Telekom. The interest rates are adjusted at the reset dates to rates defined in the applicable supplemental indentures to manage interest rate risk related to the senior reset notes. The Company determined certain components of the reset feature are required to be bifurcated from the senior reset notes and separately accounted for as embedded derivative instruments not designated as hedges. T-Mobile held five embedded derivatives as of June 30, 2014 and December 31, 2013, respectively.
	The embedded derivatives are carried at fair value with unrealized gains and losses from changes in fair value included in interest expense to affiliates. The fair value of the embedded derivatives was determined using a lattice-based valuation model by determining the fair value of the senior reset notes with and without the embedded derivatives included. The fair value of the senior reset notes with the embedded derivatives utilizes the contractual term of each senior reset note, reset rates calculated based on the spread between specified yield curves and the yield curve on T-Mobile long-term debt adjusted pursuant to the applicable supplemental indentures, and interest rate volatility. Interest rate volatility is a significant unobservable input (Level 3) as it is derived based on weighted risk-free rate volatility and credit spread volatility. Significant increases or decreases in the weighting of risk-free volatility and credit spread volatility, in isolation, would result in a higher or lower fair value of the embedded derivatives. The embedded derivatives were classified as Level 3 in the fair value hierarchy.
	Interest Rate Swaps
	Prior to the closing of the business combination with MetroPCS, T-Mobile managed interest rate risk related to its long-term debt to affiliates by entering into interest rate swap agreements. T-Mobile held seven interest rate swaps with a total notional amount of $3.6 billion as of December 31, 2012. These interest rate swap agreements were not designated as hedging instruments.
	In April 2013, prior to the closing of the business combination with MetroPCS, Deutsche Telekom recapitalized T-Mobile by retiring the existing T-Mobile long-term debt to affiliates and all related derivative instruments, which included the interest rate swaps. The related balance in accumulated other comprehensive income (“AOCI”) was reclassified into net income (loss). As of June 30, 2014 and December 31, 2013, there were no outstanding interest rate swaps.
	Cross Currency Interest Rate Swaps
	Prior to the closing of the business combination with MetroPCS, T-Mobile managed foreign currency risk along with interest rate risk through cross currency interest rate swap agreements related to its intercompany Euro denominated long-term debt to affiliates, which were entered into upon assumption of the notes to fix the future interest and principal payments in U.S. dollars, as well as to mitigate the impact of foreign currency transaction gains or losses over the terms of the long-term debt to affiliates extending to 2025. T-Mobile had three cross currency interest rate swaps with a total notional amount of $2.3 billion as of December 31, 2012. These cross currency interest rate swaps were designated as cash flow hedges and met the criteria for hedge accounting. The hedges were evaluated as highly effective prior to the closing of the business combination with MetroPCS, thus no gains (losses) were recognized due to hedge ineffectiveness.
	In April 2013, prior to the closing of the business combination with MetroPCS, Deutsche Telekom recapitalized T-Mobile by retiring the existing T-Mobile long-term debt to affiliates and all related derivative instruments, which included cross currency interest rate swaps. The related balance in AOCI was reclassified into net income (loss). As of June 30, 2014 and December 31, 2013, there were no outstanding cross currency interest rate swaps.
	Fair values of derivative instruments measured on a recurring basis by level were as follows:
		Balance Sheet Location		June 30, 2014
	(in millions)			Level 1				Level 2				Level 3				Total
	Embedded derivatives	Other current assets		$	—			$	—			$	14			$	14
	Embedded derivatives	Other assets		—				—				27				27
		Balance Sheet Location		December 31, 2013
	(in millions)			Level 1				Level 2				Level 3				Total
	Embedded derivatives	Other long-term liabilities		$	—			$	—			$	13			$	13
	The following table summarizes the activity related to derivatives instruments:
		Three Months Ended June 30,								Six Months Ended June 30,
	(in millions)	2014				2013				2014				2013
	Gain (loss) recognized in other comprehensive loss:
	Cross currency interest rate swaps	$	—			$	57			$	—			$	(17	)
	Gain (loss) recognized in interest expense to affiliates:
	Embedded derivatives	(7		)		(5		)		54				(5		)
	Interest rate swaps	—				6				—				8
	Cross currency interest rate swaps	—				48				—				53
	Long-term Debt
	The fair value of the Company’s long-term debt to affiliates was determined based on a discounted cash flow approach which considers the future cash flows discounted at current rates. The approach includes an estimate for the stand-alone credit risk of T-Mobile. The Company’s long-term debt to affiliates were classified as Level 2 in the fair value hierarchy. The fair value of the Company’s long-term debt to third parties was determined based on quoted market prices in active markets, and therefore are classified as Level 1 in the fair value hierarchy.
	The carrying amounts and fair values of the Company’s long-term debt were as follows:
		June 30, 2014								December 31, 2013
	(in millions)	Carrying Amount				Fair Value				Carrying Amount				Fair Value
	Long-term debt to affiliates	$	5,600			$	6,025			$	5,600			$	5,866
	Long-term debt to third parties principal, excluding capital leases	13,600				14,597				13,600				14,251
	Although the Company has determined the estimated fair value amounts using available market information and commonly accepted valuation methodologies, considerable judgment is required in interpreting market data to develop fair value estimates for the long-term debt. The fair value estimates are based on information available as of June 30, 2014 and December 31, 2013. As such, the Company’s estimates are not necessarily indicative of the amount that the Company could realize in a current market exchange.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Note 5 – Commitments and Contingencies
	Purchase Commitments
	T-Mobile has commitments to purchase handsets, network services, equipment, software, marketing sponsorship agreements and other items in the ordinary course of business, with various terms through 2018. These amounts are not reflective of the Company’s entire anticipated purchases under the related agreements, but are determined based on the non-cancelable quantities or termination amounts to which the Company was contractually obligated. During the second quarter of 2014, T-Mobile entered into significant new commitments for the purchase of network services, equipment and software.
	Future minimum payments for non-cancelable purchase commitments, excluding non-dedicated transportation lines, are summarized below:
	(in millions)	Purchase Commitments
	Twelve Months Ending June 30,
	2015	$	1,389
	2016	1,691
	2017	1,257
	2018	24
	2019	2
	Thereafter	—
	Total	$	4,363
	Guarantee Liabilities
	T-Mobile offers a handset upgrade program, Just Upgrade My Phone (“JUMP!”), that provides eligible customers a specified-price trade-in right to upgrade their handset.  Participating customers must finance their handset using an EIP.  Upon upgrading, the customer will receive a credit for up to 50% of their initially financed EIP balance provided they trade in their eligible used handset in good working condition and purchase a new handset from T-Mobile.
	For customers who enroll in the trade-in programs, the Company defers the portion of equipment sales revenue which represents the estimated value of the specified-price trade-in right guarantee.  The guarantee liabilities are valued based on various economic and customer behavioral assumptions, including the customer's estimated remaining EIP balance at trade-in, the expected fair value of the used handset at trade-in, and the probability and timing of trade-in.  When the customer upgrades their handset, the difference between the trade-in credit to the customer and the fair value of the returned handset is recorded against the guarantee liabilities.  Guarantee liabilities included in other current liabilities were $298 million and $191 million as of June 30, 2014 and December 31, 2013, respectively.  The estimated EIP receivable balance if all enrolled handset upgrade program customers were to claim their benefit, not including any trade-in value of the required used handset, was $2.1 billion as of June 30, 2014. This 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 in good working condition at trade-in, nor does it consider the probability and timing of trade-in.
	Contingencies and Litigation
	T-Mobile is involved in various lawsuits, regulatory proceedings, and other similar matters, including class actions and intellectual property claims, including patent infringement claims, that arise in the ordinary course of business. Specifically, T-Mobile faces actual and potential litigation and other legal and regulatory proceedings that challenge customer billing and other business practices, and seek awards of damages, restitution, injunctive relief, and/or penalties. T-Mobile has established an accrual with respect to certain of these matters, where appropriate, which is reflected in the condensed consolidated financial statements but that T-Mobile does not consider, individually or in the aggregate, significant. An accrual is established when T-Mobile believes it is both probable that a loss has been incurred and an amount can be reasonably estimated. For other matters, where the Company has not determined that a loss is probable or because the amount of loss cannot be reasonably estimated, the Company has not recorded an accrual due to various factors typical in contested proceedings, including but not limited to: uncertainty concerning legal theories and their resolution by courts or regulators; uncertain damage theories and demands; and a less than fully developed factual record. While T-Mobile does not expect that the ultimate resolution of these proceedings, individually or in the aggregate, including the Federal Trade Commission (“FTC”) litigation and related matters described below, will have a material adverse effect on the Company’s financial position, an unfavorable outcome of some or all of these proceedings could have a material adverse impact on results of operations or cash flows for a particular period. This assessment is based on T-Mobile’s current understanding of relevant facts and circumstances. As such, T-Mobile’s view of these matters is subject to inherent uncertainties and may change in the future.
	As T-Mobile has previously disclosed, state Attorneys General and other government agencies have engaged in investigations and inquiries regarding third-party billing, a practice sometimes referred to as “cramming”, and are seeking restitution and changes in business practices. In particular, these investigations and inquiries have focused on alleged unauthorized billing for premium Short Message Service (“SMS”) content. Premium SMS content was provided to customers by third parties that sent text alerts on topics of interest, such as weather and sports scores, and ringtones. T-Mobile, along with the other major wireless carriers, stopped billing for these services in late 2013. In June 2014, T-Mobile announced a comprehensive refund program, under which T-Mobile will notify current and former customers who paid for premium SMS content and have not already received a refund how to request a summary of these charges and a refund for those charges customers assert to have been unauthorized. T-Mobile recognized the estimated cost of the refund program as a reduction to service revenues during the second quarter of 2014.
	On July 1, 2014, the FTC filed a lawsuit alleging that T-Mobile allowed third-party merchants to include unauthorized premium SMS content charges on customer bills, and seeking restitution and changes in business practices (Federal Trade Commission v. T-Mobile USA, Inc., Case No. 2:14-cv-00967-JLR, W.D. Washington). This complaint does not seek a specified sum as monetary relief. In addition, the Federal Communications Commission (“FCC”) and other government agencies have begun investigations and inquiries regarding billing for premium SMS content. Although it is reasonably possible that T-Mobile may incur losses relating to the alleged unauthorized billing of customers for premium SMS content in excess of the amount already recognized in connection with the comprehensive refund program described above, T-Mobile cannot reasonably estimate the amount of the possible loss or the range of loss, if any, which may result from these matters given the procedural status of the disputes, the legal issues presented, T-Mobile’s legal and factual defenses, the inherent difficulty in predicting the potential for or amount of regulatory fines and penalties, and the various remedies and levels of judicial review available to T-Mobile in the event a monetary award, fine or penalty is assessed. T-Mobile is vigorously defending these proceedings.

Additional_Financial_Informati

Additional Financial Information	6 Months Ended
	Jun. 30, 2014
Additional Financial Information [Abstract]	'
Additional Financial Information	'
	Note 6 – Additional Financial Information
	Supplemental Balance Sheet Information
	Cash and Cash Equivalents
	T-Mobile is required to restrict cash equivalents as collateral for certain agreements.  Restricted cash equivalents included in other current assets were $100 million as of June 30, 2014 and December 31, 2013, respectively.
	Accumulated Other Comprehensive Income
	There were no significant effects on net income (loss) of amounts reclassified from AOCI for the three and six months ended June 30, 2014.
	The following table presents the effects on net income (loss) of amounts reclassified from AOCI (in millions):
				Amount Reclassified from AOCI to Income
	AOCI Component		Location	Three Months Ended June 30, 2013				Six Months Ended June 30, 2013
	Cross Currency Interest Rate Swaps		Interest expense to affiliates	$	(48	)		$	(53	)
			Income tax effect	18				20
			Net of tax	(30		)		(33		)
	Foreign Currency Translation		Other income, net	166				166
			Income tax effect	(62		)		(62		)
			Net of tax	104				104
	Total reclassifications, net of tax			$	74			$	71
	Supplemental Statements of Comprehensive Income (Loss) Information
	Earnings (Loss) Per Share
	The computation of basic and diluted earnings (loss) per share was as follows:
		Three Months Ended June 30,							Six Months Ended June 30,
	(in millions, except shares and per share amounts)	2014			2013				2014		2013
	Basic and Diluted Earnings (Loss) Per Share:
	Net income (loss)	$	391		$	(16	)		$	240	$	91
	Weighted average shares outstanding - basic	803,923,913			664,603,682				803,226,194		600,302,111
	Dilutive effect of outstanding stock options and awards	9,632,224			—				9,676,941		1,392,800
	Weighted average shares outstanding - diluted	813,556,137			664,603,682				812,903,135		601,694,911
	Earnings (loss) per share - basic	$	0.49		$	(0.02	)		$	0.3	$	0.15
	Earnings (loss) per share - diluted	0.48			(0.02		)		0.3		0.15
	Potentially dilutive securities were not included in the computation of diluted earnings (loss) per share for certain periods if to do so would have been antidilutive.  For the three months ended June 30, 2014, potentially dilutive outstanding stock options of 1,631,748 and unvested stock awards of 65,108 as of June 30, 2014 were excluded. As the Company incurred a net loss for the three months ended June 30, 2013, all outstanding stock options of 11,319,269 and unvested stock awards of 22,911,491 as of June 30, 2013 were excluded. For the six months ended June 30, 2014 and 2013, potentially dilutive outstanding stock options of 1,631,748 and 8,460,878 and unvested stock awards of 87,816 and 22,911,491 as of June 30, 2014 and 2013, respectively, were excluded. Unvested performance stock units were based on the number of shares ultimately expected to vest based on T-Mobile’s business performance against the specified performance goal.
	Supplemental Statements of Cash Flows Information
	The following table summarizes T-Mobile’s supplemental cash flows information:
		Six Months Ended June 30,
	(in millions)	2014			2013
	Interest and income tax payments:
	Interest payments	$	639		$	583
	Income tax payments	23			14
	Noncash investing and financing activities:
	Increase in accounts payable for purchases of property and equipment	56			173
	Short-term debt outstanding for financing of property and equipment purchases	250			193
	Retirement of long-term debt to affiliates	—			14,450
	Elimination of net unamortized discounts and premiums on long-term debt to affiliates	—			434
	Issuance of new long-term debt to affiliates	—			11,200
	Settlement of accounts receivable from affiliates and other outstanding balances	—			363
	Income tax benefit from debt recapitalization	—			178
	Net assets acquired in MetroPCS business combination, excluding cash acquired	—			827

Guarantor_Financial_Informatio

Guarantor Financial Information	6 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Guarantor Financial Information	'
	Note 7 – Guarantor Financial Information
	Pursuant to the applicable indentures and supplemental indentures, the long-term debt, excluding capital leases, issued by T-Mobile USA (“Issuer”) is fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by T-Mobile (“Parent”) and certain of the Issuer’s wholly owned subsidiaries (“Guarantor Subsidiaries”). The guarantees of the Guarantor Subsidiaries are subject to release in limited circumstances only upon the occurrence of certain customary conditions. The indentures governing the long-term debt contain covenants that, among other things, limit the ability of the Issuer and the Guarantor Subsidiaries to: incur more debt; pay dividends and make distributions; make certain investments; repurchase stock; create liens or other encumbrances; enter into transactions with affiliates; enter into transactions that restrict dividends or distributions from subsidiaries; and merge, consolidate, or sell, or otherwise dispose of, substantially all of their assets. Certain provisions of each of the indentures and the supplemental indentures relating to the long-term debt restrict the ability of the Issuer to loan funds or make payments to Parent. However, the Issuer and Guarantor Subsidiaries are allowed to make certain permitted payments to the Parent under the terms of the indentures and the supplemental indentures.
	In February 2014, T-Mobile entered into a factoring arrangement to sell certain service accounts receivable on a revolving basis. In connection with the factoring arrangement, the Company formed the Factoring SPE, which is included in the Non-Guarantor Subsidiaries condensed consolidating financial information. See Note 2 – Acquisitions and Other Transactions for further information regarding the factoring arrangement.
	In April 2014, Parent contributed $1.7 billion of cash to the Issuer in connection with the Verizon 700 MHz A-Block spectrum license acquisition. The transaction was recorded as an equity contribution and reflected in investments in subsidiaries, net on the Parent’s condensed consolidating balance sheet information. In addition, the contribution was presented as an investing activity from the Parent to the Issuer in the condensed consolidating statement of cash flows information.
	Presented below is the condensed consolidating financial information as of June 30, 2014 and December 31, 2013 and for the three and six months ended June 30, 2014 and 2013, respectively. As the business combination was treated as a “reverse acquisition” and the Issuer was treated as the accounting acquirer, the Issuer’s historical financial statements are the historical financial statements of Parent for comparative purposes. As a result the Parent column only reflects activity in the condensed consolidating financial statements presented below for periods subsequent to the consummation of the business combination on April 30, 2013. The equity method of accounting is used to account for ownership interests in subsidiaries, where applicable.
	Condensed Consolidating Balance Sheet Information
	As of June 30, 2014
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Assets
	Current assets
	Cash and cash equivalents	$	1,288		$	1,500		$	61		$	231		$	—		$	3,080
	Accounts receivable, net	—			—			3,782			157			—			3,939
	Accounts receivable from affiliates	—			—			87			—			—			87
	Inventory	—			—			791			—			—			791
	Current portion of deferred tax assets, net	—			—			805			15			—			820
	Other current assets	—			14			909			256			—			1,179
	Total current assets	1,288			1,514			6,435			659			—			9,896
	Property and equipment, net of accumulated depreciation	—			—			14,982			555			—			15,537
	Goodwill	—			—			1,683			—			—			1,683
	Spectrum licenses	—			—			21,828			—			—			21,828
	Other intangible assets, net of accumulated amortization	—			—			1,040			—			—			1,040
	Investments in subsidiaries, net	13,455			29,942			112			—			(43,509		)	—
	Intercompany receivables	—			2,172			—			—			(2,172		)	—
	Other assets	2			50			1,618			82			(72		)	1,680
	Total assets	$	14,745		$	33,678		$	47,698		$	1,296		$	(45,753	)	$	51,664
	Liabilities and Stockholders' Equity
	Current liabilities
	Accounts payable and accrued liabilities	$	—		$	334		$	4,907		$	314		$	—		$	5,555
	Current payables and short-term debt to affiliates	—			56			180			—			—			236
	Short-term debt	—			250			22			—			—			272
	Deferred revenue	—			—			447			—			—			447
	Other current liabilities	—			—			598			23			—			621
	Total current liabilities	—			640			6,154			337			—			7,131
	Long-term debt to affiliates	—			5,600			—			—			—			5,600
	Long-term debt	—			13,983			386			—			—			14,369
	Long-term financial obligation	—			—			367			2,135			—			2,502
	Deferred tax liabilities	—			—			4,829			—			(72		)	4,757
	Deferred rents	—			—			2,237			—			—			2,237
	Negative carrying value of subsidiaries, net	—			—			804			—			(804		)	—
	Intercompany payables	182			—			1,929			61			(2,172		)	—
	Other long-term liabilities	—			—			505			—			—			505
	Total long-term liabilities	182			19,583			11,057			2,196			(3,048		)	29,970
	Total stockholders' equity	14,563			13,455			30,487			(1,237		)	(42,705		)	14,563
	Total liabilities and stockholders' equity	$	14,745		$	33,678		$	47,698		$	1,296		$	(45,753	)	$	51,664
	Condensed Consolidating Balance Sheet Information
	As of December 31, 2013
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Assets
	Current assets
	Cash and cash equivalents	$	2,960		$	2,698		$	57		$	176		$	—		$	5,891
	Accounts receivable, net	—			—			3,541			78			—			3,619
	Accounts receivable from affiliates	—			—			41			—			—			41
	Inventory	—			—			586			—			—			586
	Current portion of deferred tax assets, net	—			—			824			15			—			839
	Other current assets	—			—			1,250			2			—			1,252
	Total current assets	2,960			2,698			6,299			271			—			12,228
	Property and equipment, net of accumulated depreciation	—			—			14,754			595			—			15,349
	Goodwill	—			—			1,683			—			—			1,683
	Spectrum licenses	—			—			18,122			—			—			18,122
	Other intangible assets, net of accumulated amortization	—			—			1,204			—			—			1,204
	Investments in subsidiaries, net	11,484			29,123			—			—			(40,607		)	—
	Intercompany receivables	—			—			418			—			(418		)	—
	Other assets	2			24			1,292			93			(44		)	1,367
Total assets	$	14,446		$	31,845		$	43,772		$	959		$	(41,069	)	$	49,953
Liabilities and Stockholders' Equity
Current liabilities
Accounts payable and accrued liabilities	$	—		$	273		$	4,218		$	76		$	—		$	4,567
Current payables and short-term debt to affiliates	—			56			143			—			—			199
Short-term debt	—			226			18			—			—			244
Deferred revenue	—			—			445			—			—			445
Other current liabilities	—			—			313			40			—			353
Total current liabilities	—			555			5,137			116			—			5,808
Long-term debt to affiliates	—			5,600			—			—			—			5,600
Long-term debt	—			14,010			335			—			—			14,345
Long-term financial obligation	—			—			365			2,131			—			2,496
Deferred tax liabilities	—			—			4,689			—			(44		)	4,645
Deferred rents	—			—			2,113			—			—			2,113
Negative carrying value of subsidiaries, net	—			—			779			—			(779		)	—
Intercompany payables	201			183			—			34			(418		)	—
Other long-term liabilities	—			13			688			—			—			701
Total long-term liabilities	201			19,806			8,969			2,165			(1,241		)	29,900
Total stockholders' equity	14,245			11,484			29,666			(1,322		)	(39,828		)	14,245
Total liabilities and stockholders' equity	$	14,446		$	31,845		$	43,772		$	959		$	(41,069	)	$	49,953
Condensed Consolidating Statement of Comprehensive Income (Loss) Information
Three Months Ended June 30, 2014
(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
Revenues
Service revenues	$	—		$	—		$	5,259		$	323		$	(98	)	$	5,484
Equipment sales	—			—			1,768			—			(168		)	1,600
Other revenues	—			—			70			34			(3		)	101
Total revenues	—			—			7,097			357			(269		)	7,185
Operating expenses
Cost of services	—			—			1,447			6			—			1,453
Cost of equipment sales	—			—			2,188			207			(180		)	2,215
Selling, general and administrative	—			—			2,116			124			(89		)	2,151
Depreciation and amortization	—			—			1,108			21			—			1,129
MetroPCS transaction and integration costs	—			—			22			—			—			22
Restructuring costs	—			—			—			—			—			—
Other, net	—			—			(747		)	—			—			(747		)
Total operating expenses	—			—			6,134			358			(269		)	6,223
Operating income (loss)	—			—			963			(1		)	—			962
Other income (expense)
Interest expense to affiliates	—			(85		)	—			—			—			(85		)
Interest expense	—			(212		)	(15		)	(44		)	—			(271		)
Interest income	—			—			83			—			—			83
Other income (expense), net	—			(14		)	2			—			—			(12		)
Total other income (expense), net	—			(311		)	70			(44		)	—			(285		)
Income (loss) before income taxes	—			(311		)	1,033			(45		)	—			677
Income tax expense (benefit)	—			—			306			(20		)	—			286
Earnings (loss) of subsidiaries	391			702			(12		)	—			(1,081		)	—
Net income (loss)	391			391			715			(25		)	(1,081		)	391
Other comprehensive loss, net of tax	—			—			—			—			—			—
Total comprehensive income (loss)	$	391		$	391		$	715		$	(25	)	$	(1,081	)	$	391
Condensed Consolidating Statement of Comprehensive Income (Loss) Information
Three Months Ended June 30, 2013
(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
Revenues
Service revenues	$	—		$	—		$	4,591		$	191		$	(26	)	$	4,756
Equipment sales	—			—			1,542			—			(163		)	1,379
Other revenues	—			—			85			44			(36		)	93
Total revenues	—			—			6,218			235			(225		)	6,228
Operating expenses
Cost of services	—			—			1,342			21			(36		)	1,327
Cost of equipment sales	—			—			1,994			122			(180		)	1,936
Selling, general and administrative	—			—			1,821			35			(9		)	1,847
Depreciation and amortization	—			—			867			21			—			888
MetroPCS transaction and integration costs	—			—			26			—			—			26
Restructuring costs	—			—			23			—			—			23
Total operating expenses	—			—			6,073			199			(225		)	6,047
Operating income	—			—			145			36			—			181
Other income (expense)
Interest expense to affiliates	—			(225		)	—			—			—			(225		)
Interest expense	—			(53		)	(13		)	(43		)	—			(109		)
Interest income	—			—			40			—			—			40
Other income (expense), net	—			120			(2		)	—			—			118
Total other income (expense), net	—			(158		)	25			(43		)	—			(176		)
Income (loss) before income taxes	—			(158		)	170			(7		)	—			5
Income tax expense (benefit)	—			—			28			(7		)	—			21
Earnings (loss) of subsidiaries	(47		)	142			(15		)	—			(80		)	—
Net income (loss)	(47		)	(16		)	127			—			(80		)	(16		)
Other comprehensive income (loss), net of tax	—			(38		)	23			—			(23		)	(38		)
Total comprehensive income (loss)	$	(47	)	$	(54	)	$	150		$	—		$	(103	)	$	(54	)
Condensed Consolidating Statement of Comprehensive Income (Loss) Information
Six Months Ended June 30, 2014
(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
Revenues
Service revenues	$	—		$	—		$	10,409		$	588		$	(176	)	$	10,821
Equipment sales	—			—			3,365			—			(317		)	3,048
Other revenues	—			—			128			68			(5		)	191
Total revenues	—			—			13,902			656			(498		)	14,060
Operating expenses
Cost of services	—			—			2,907			10			—			2,917
Cost of equipment sales	—			—			4,501			345			(345		)	4,501
Selling, general and administrative	—			—			4,176			224			(153		)	4,247
Depreciation and amortization	—			—			2,143			41			—			2,184
MetroPCS transaction and integration costs	—			—			34			—			—			34
Other, net	—			—			(757		)	—			—			(757		)
Total operating expenses	—			—			13,004			620			(498		)	13,126
Operating income	—			—			898			36			—			934
Other income (expense)
Interest expense to affiliates	—			(103		)	—			—			—			(103		)
Interest expense	—			(426		)	(33		)	(88		)	—			(547		)
Interest income	—			—			158			—			—			158
Other income (expense), net	—			(22		)	4			—			—			(18		)
Total other income (expense), net	—			(551		)	129			(88		)	—			(510		)
Income (loss) before income taxes	—			(551		)	1,027			(52		)	—			424
Income tax expense (benefit)	—			—			206			(22		)	—			184
Earnings (loss) of subsidiaries	240			791			(27		)	—			(1,004		)	—
Net income (loss)	240			240			794			(30		)	(1,004		)	240
Other comprehensive loss, net of tax	(3		)	(3		)	(3		)	—			6			(3		)
Total comprehensive income (loss)	$	237		$	237		$	791		$	(30	)	$	(998	)	$	237
Condensed Consolidating Statement of Comprehensive Income (Loss) Information
Six Months Ended June 30, 2013
(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
Revenues
Service revenues	$	—		$	—		$	8,447		$	367		$	(52	)	$	8,762
Equipment sales	—			—			2,308			—			(324		)	1,984
Other revenues	—			—			141			86			(68		)	159
Total revenues	—			—			10,896			453			(444		)	10,905
Operating expenses
Cost of services	—			—			2,464			40			(68		)	2,436
Cost of equipment sales	—			—			2,926			251			(355		)	2,822
Selling, general and administrative	—			—			3,303			71			(21		)	3,353
Depreciation and amortization	—			—			1,602			41			—			1,643
MetroPCS transaction and integration costs	—			—			39			—			—			39
Restructuring costs	—			—			54			—			—			54
Other, net	—			—			(2		)	—			—			(2		)
Total operating expenses	—			—			10,386			403			(444		)	10,345
Operating income	—			—			510			50			—			560
Other income (expense)
Interest expense to affiliates	—			(403		)	—			—			—			(403		)
Interest expense	—			(54		)	(20		)	(86		)	—			(160		)
Interest income	—			—			75			—			—			75
Other income (expense), net	—			114			(2		)	—			—			112
Total other income (expense), net	—			(343		)	53			(86		)	—			(376		)
Income (loss) before income taxes	—			(343		)	563			(36		)	—			184
Income tax expense (benefit)	—			—			109			(16		)	—			93
Earnings (loss) of subsidiaries	(47		)	434			(29		)	—			(358		)	—
Net income (loss)	(47		)	91			425			(20		)	(358		)	91
Other comprehensive income (loss), net of tax	—			(39		)	24			—			(24		)	(39		)
Total comprehensive income (loss)	$	(47	)	$	52		$	449		$	(20	)	$	(382	)	$	52
Condensed Consolidating Statement of Cash Flows Information
Six Months Ended June 30, 2014
(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
Operating activities
Net cash provided by (used in) operating activities	$	5		$	(2,898	)	$	4,567		$	55		$	—		$	1,729
Investing activities
Purchases of property and equipment	—			—			(1,887		)	—			—			(1,887		)
Purchases of spectrum licenses and other intangible assets	—			—			(2,367		)	—			—			(2,367		)
Investment in subsidiaries	(1,700		)	—			—			—			1,700			—
Investments in unconsolidated affiliates, net	—			—			(20		)	—			—			(20		)
Other, net	—			—			(1		)	—			—			(1		)
Net cash used in investing activities	(1,700		)	—			(4,275		)	—			1,700			(4,275		)
Financing activities
Proceeds from capital contribution	—			1,700			—			—			(1,700		)	—
Repayments of short-term debt for purchases of property and equipment	—			—			(231		)	—			—			(231		)
Taxes paid related to net share settlement of stock awards	—			—			(72		)	—			—			(72		)
Excess tax benefit from stock-based compensation	—			—			33			—			—			33
Proceeds from exercise of stock options	23			—			—			—			—			23
Other, net	—			—			(18		)	—			—			(18		)
Net cash provided by (used in) financing activities	23			1,700			(288		)	—			(1,700		)	(265		)
Change in cash and cash equivalents	(1,672		)	(1,198		)	4			55			—			(2,811		)
Cash and cash equivalents
Beginning of period	2,960			2,698			57			176			—			5,891
End of period	$	1,288		$	1,500		$	61		$	231		$	—		$	3,080
Condensed Consolidating Statement of Cash Flows Information
Six Months Ended June 30, 2013
(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
Operating activities
Net cash provided by (used in) operating activities	$	298		$	(386	)	$	1,769		$	34		$	—		$	1,715
Investing activities
Purchases of property and equipment	—			—			(2,126		)	—			—			(2,126		)
Purchases of spectrum licenses and other intangible assets	—			—			(51		)	—			—			(51		)
Short term affiliate loan receivable, net	—			—			300			—			—			300
Cash and cash equivalents acquired in MetroPCS business combination	737			1,407			—			—			—			2,144
Other, net	—			—			(5		)	—			—			(5		)
Net cash provided by (used in) investing activities	737			1,407			(1,882		)	—			—			262
Financing activities
Repayments related to a variable interest entity	—			—			(40		)	—			—			(40		)
Distribution to affiliate	—			—			(41		)	—			—			(41		)
Excess tax benefit from stock-based compensation	—			—			3			—			—			3
Proceeds from exercise of stock options	72			—			—			—			—			72
Other, net	—			—			(3		)	—			—			(3		)
Net cash provided by (used in) financing activities	72			—			(81		)	—			—			(9		)
Change in cash and cash equivalents	1,107			1,021			(194		)	34			—			1,968
Cash and cash equivalents
Beginning of period	—			—			287			107			—			394
End of period	$	1,107		$	1,021		$	93		$	141		$	—		$	2,362

Subsequent_Events

Subsequent Events	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Note 8 – Subsequent Events
	Contingencies and Litigation
	In July 2014, the FTC filed a lawsuit against T-Mobile alleging claims related to the inclusion of unauthorized charges by third-party merchants on T-Mobile customer bills.  In addition, the FCC and other government agencies have begun investigations and inquiries regarding third-party billing, such as for premium SMS content.  See Note 5 – Commitments and Contingencies for further information.
	Network Decommissioning Costs
	Prior to the closing of the business combination, T-Mobile developed integration plans which included the decommissioning of the MetroPCS Code Division Multiple Access (“CDMA”) network and certain other redundant network cell sites. In July 2014, T-Mobile began decommissioning the MetroPCS CDMA network and redundant network cell sites. During the second half of 2014, T-Mobile expects to incur network decommissioning costs between $250 million and $300 million for certain cell sites in three major metropolitan markets. Network decommissioning costs primarily relate to the acceleration of lease costs for cell sites, which will result in cash expenditures that will continue to be made over the remaining lease terms, but for which T-Mobile will no longer receive any economic benefit. Accrued liabilities for network decommissioning costs will be relieved as payments are made over the remaining lease terms. Network decommissioning costs will be recognized in MetroPCS transaction and integration costs in the condensed consolidated statements of comprehensive income (loss).
	T-Mobile expects to decommission certain cell sites in additional major metropolitan markets in 2015 and 2016. Currently, T-Mobile is unable to estimate the expected network decommissioning costs and related future cash expenditures for those cell sites due to uncertainties regarding the specific sites to be decommissioned and the timing of such decommissioning.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	The unaudited condensed consolidated financial statements of T-Mobile US, Inc. (“T-Mobile” or the “Company”) include all adjustments of a normal recurring nature necessary for the fair presentation of the results for the interim periods presented. The results for the interim periods are not necessarily indicative of those for the full year. The condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2013.
Principles of Consolidation	'
	The condensed consolidated financial statements include the balances and results of operations of T-Mobile and its consolidated subsidiaries. T-Mobile consolidates all majority-owned subsidiaries over which it exercises control, as well as variable interest entities (“VIE”) where it is deemed to be the primary beneficiary and VIEs which cannot be deconsolidated. Intercompany transactions and balances have been eliminated in consolidation.
Use of Estimates	'
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the financial statements and accompanying notes. Actual results could differ from those estimates.
New Accounting Pronouncements	'
	Recently Issued Accounting Standards
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers.” The standard requires entities to recognize revenue through the application of a five-step model, which includes identification of the contract, identification of the performance obligations, determination of the transaction price, allocation of the transaction price to the performance obligations, and recognition of revenue as the entity satisfies the performance obligations. The standard will become effective for T-Mobile beginning January 1, 2017. The Company is currently evaluating the guidance to determine the potential impact on T-Mobile’s financial condition, results of operations and cash flows, and financial statement disclosures.

Equipment_Installment_Plan_Rec1

Equipment Installment Plan Receivables (Tables)	6 Months Ended
	Jun. 30, 2014
Equipment Installment Plan Receivables [Abstract]	'
Schedule of Equipment Installment Plan Receivables	'
	The following table summarizes the EIP receivables:
	(in millions)	June 30,			December 31,
		2014			2013
	EIP receivables, gross	$	4,029		$	2,882
	Deferred interest	(320		)	(276		)
	EIP receivables, net of deferred interest	3,709			2,606
	Allowance for credit losses	(126		)	(60		)
	EIP receivables, net	$	3,583		$	2,546
	Classified on the balance sheet as:
	Accounts receivable, net	$	2,190		$	1,471
	Other assets	1,393			1,075
	EIP receivables, net	$	3,583		$	2,546
Schedule of Equipment Installment Plan Receivables by Credit Category	'
	The balance and aging of the EIP receivables on a gross basis by credit category were as follows:
		June 30, 2014								December 31, 2013
	(in millions)	Prime			Subprime			Total		Prime		Subprime		Total
	Unbilled	$	2,058		$	1,798		$	3,856	$	1,482	$	1,270	$	2,752
	Billed - Current	59			60			119		45		45		90
	Billed - Past Due	20			34			54		15		25		40
	EIP receivables, gross	$	2,137		$	1,892		$	4,029	$	1,542	$	1,340	$	2,882
Schedule of Deferred Interest and Allowance for Credit Losses	'
	Activity in the deferred interest and allowance for credit losses for the EIP receivables was as follows:
	(in millions)	June 30,
		2014
	Deferred interest and allowance for credit losses, beginning of period	$	336
	Bad debt expense	187
	Write-offs, net of recoveries	(121		)
	Change in deferred interest on short-term and long-term EIP receivables	44
	Deferred interest and allowance for credit losses, end of period	$	446

Fair_Value_Measurements_and_De1

Fair Value Measurements and Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value of Derivative Instruments	'
	Fair values of derivative instruments measured on a recurring basis by level were as follows:
		Balance Sheet Location		June 30, 2014
	(in millions)			Level 1				Level 2				Level 3				Total
	Embedded derivatives	Other current assets		$	—			$	—			$	14			$	14
	Embedded derivatives	Other assets		—				—				27				27
		Balance Sheet Location		December 31, 2013
	(in millions)			Level 1				Level 2				Level 3				Total
	Embedded derivatives	Other long-term liabilities		$	—			$	—			$	13			$	13
Schedule of Gains (Losses) on Derivative Instruments	'
	The following table summarizes the activity related to derivatives instruments:
		Three Months Ended June 30,								Six Months Ended June 30,
	(in millions)	2014				2013				2014				2013
	Gain (loss) recognized in other comprehensive loss:
	Cross currency interest rate swaps	$	—			$	57			$	—			$	(17	)
	Gain (loss) recognized in interest expense to affiliates:
	Embedded derivatives	(7		)		(5		)		54				(5		)
	Interest rate swaps	—				6				—				8
	Cross currency interest rate swaps	—				48				—				53
Schedule of Carrying Values and Fair Values of Long-term Debt	'
	The carrying amounts and fair values of the Company’s long-term debt were as follows:
		June 30, 2014								December 31, 2013
	(in millions)	Carrying Amount				Fair Value				Carrying Amount				Fair Value
	Long-term debt to affiliates	$	5,600			$	6,025			$	5,600			$	5,866
	Long-term debt to third parties principal, excluding capital leases	13,600				14,597				13,600				14,251

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Purchase Commitments	'
	Future minimum payments for non-cancelable purchase commitments, excluding non-dedicated transportation lines, are summarized below:
	(in millions)	Purchase Commitments
	Twelve Months Ending June 30,
	2015	$	1,389
	2016	1,691
	2017	1,257
	2018	24
	2019	2
	Thereafter	—
	Total	$	4,363

Additional_Financial_Informati1

Additional Financial Information (Tables)	6 Months Ended
	Jun. 30, 2014
Additional Financial Information [Abstract]	'
Schedule of Reclassifications Out of Accumulated Other Comprehensive Income	'
	The following table presents the effects on net income (loss) of amounts reclassified from AOCI (in millions):
				Amount Reclassified from AOCI to Income
	AOCI Component		Location	Three Months Ended June 30, 2013				Six Months Ended June 30, 2013
	Cross Currency Interest Rate Swaps		Interest expense to affiliates	$	(48	)		$	(53	)
			Income tax effect	18				20
			Net of tax	(30		)		(33		)
	Foreign Currency Translation		Other income, net	166				166
			Income tax effect	(62		)		(62		)
			Net of tax	104				104
	Total reclassifications, net of tax			$	74			$	71
Schedule of Earnings Per Share, Basic and Diluted	'
	The computation of basic and diluted earnings (loss) per share was as follows:
		Three Months Ended June 30,							Six Months Ended June 30,
	(in millions, except shares and per share amounts)	2014			2013				2014		2013
	Basic and Diluted Earnings (Loss) Per Share:
	Net income (loss)	$	391		$	(16	)		$	240	$	91
	Weighted average shares outstanding - basic	803,923,913			664,603,682				803,226,194		600,302,111
	Dilutive effect of outstanding stock options and awards	9,632,224			—				9,676,941		1,392,800
	Weighted average shares outstanding - diluted	813,556,137			664,603,682				812,903,135		601,694,911
	Earnings (loss) per share - basic	$	0.49		$	(0.02	)		$	0.3	$	0.15
	Earnings (loss) per share - diluted	0.48			(0.02		)		0.3		0.15
Schedule of Cash Flow, Supplemental Disclosures	'
	The following table summarizes T-Mobile’s supplemental cash flows information:
		Six Months Ended June 30,
	(in millions)	2014			2013
	Interest and income tax payments:
	Interest payments	$	639		$	583
	Income tax payments	23			14
	Noncash investing and financing activities:
	Increase in accounts payable for purchases of property and equipment	56			173
	Short-term debt outstanding for financing of property and equipment purchases	250			193
	Retirement of long-term debt to affiliates	—			14,450
	Elimination of net unamortized discounts and premiums on long-term debt to affiliates	—			434
	Issuance of new long-term debt to affiliates	—			11,200
	Settlement of accounts receivable from affiliates and other outstanding balances	—			363
	Income tax benefit from debt recapitalization	—			178
	Net assets acquired in MetroPCS business combination, excluding cash acquired	—			827

Guarantor_Financial_Informatio1

Guarantor Financial Information (Tables)	6 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Schedule of Condensed Consolidating Balance Sheet Information	'
	Condensed Consolidating Balance Sheet Information
	As of June 30, 2014
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Assets
	Current assets
	Cash and cash equivalents	$	1,288		$	1,500		$	61		$	231		$	—		$	3,080
	Accounts receivable, net	—			—			3,782			157			—			3,939
	Accounts receivable from affiliates	—			—			87			—			—			87
	Inventory	—			—			791			—			—			791
	Current portion of deferred tax assets, net	—			—			805			15			—			820
	Other current assets	—			14			909			256			—			1,179
	Total current assets	1,288			1,514			6,435			659			—			9,896
	Property and equipment, net of accumulated depreciation	—			—			14,982			555			—			15,537
	Goodwill	—			—			1,683			—			—			1,683
	Spectrum licenses	—			—			21,828			—			—			21,828
	Other intangible assets, net of accumulated amortization	—			—			1,040			—			—			1,040
	Investments in subsidiaries, net	13,455			29,942			112			—			(43,509		)	—
	Intercompany receivables	—			2,172			—			—			(2,172		)	—
	Other assets	2			50			1,618			82			(72		)	1,680
	Total assets	$	14,745		$	33,678		$	47,698		$	1,296		$	(45,753	)	$	51,664
	Liabilities and Stockholders' Equity
	Current liabilities
	Accounts payable and accrued liabilities	$	—		$	334		$	4,907		$	314		$	—		$	5,555
	Current payables and short-term debt to affiliates	—			56			180			—			—			236
	Short-term debt	—			250			22			—			—			272
	Deferred revenue	—			—			447			—			—			447
	Other current liabilities	—			—			598			23			—			621
	Total current liabilities	—			640			6,154			337			—			7,131
	Long-term debt to affiliates	—			5,600			—			—			—			5,600
	Long-term debt	—			13,983			386			—			—			14,369
	Long-term financial obligation	—			—			367			2,135			—			2,502
	Deferred tax liabilities	—			—			4,829			—			(72		)	4,757
	Deferred rents	—			—			2,237			—			—			2,237
	Negative carrying value of subsidiaries, net	—			—			804			—			(804		)	—
	Intercompany payables	182			—			1,929			61			(2,172		)	—
	Other long-term liabilities	—			—			505			—			—			505
	Total long-term liabilities	182			19,583			11,057			2,196			(3,048		)	29,970
	Total stockholders' equity	14,563			13,455			30,487			(1,237		)	(42,705		)	14,563
	Total liabilities and stockholders' equity	$	14,745		$	33,678		$	47,698		$	1,296		$	(45,753	)	$	51,664
	Condensed Consolidating Balance Sheet Information
	As of December 31, 2013
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Assets
	Current assets
	Cash and cash equivalents	$	2,960		$	2,698		$	57		$	176		$	—		$	5,891
	Accounts receivable, net	—			—			3,541			78			—			3,619
	Accounts receivable from affiliates	—			—			41			—			—			41
	Inventory	—			—			586			—			—			586
	Current portion of deferred tax assets, net	—			—			824			15			—			839
	Other current assets	—			—			1,250			2			—			1,252
	Total current assets	2,960			2,698			6,299			271			—			12,228
	Property and equipment, net of accumulated depreciation	—			—			14,754			595			—			15,349
	Goodwill	—			—			1,683			—			—			1,683
	Spectrum licenses	—			—			18,122			—			—			18,122
	Other intangible assets, net of accumulated amortization	—			—			1,204			—			—			1,204
	Investments in subsidiaries, net	11,484			29,123			—			—			(40,607		)	—
	Intercompany receivables	—			—			418			—			(418		)	—
	Other assets	2			24			1,292			93			(44		)	1,367
	Total assets	$	14,446		$	31,845		$	43,772		$	959		$	(41,069	)	$	49,953
	Liabilities and Stockholders' Equity
	Current liabilities
	Accounts payable and accrued liabilities	$	—		$	273		$	4,218		$	76		$	—		$	4,567
	Current payables and short-term debt to affiliates	—			56			143			—			—			199
Short-term debt	—			226			18			—			—			244
Deferred revenue	—			—			445			—			—			445
Other current liabilities	—			—			313			40			—			353
Total current liabilities	—			555			5,137			116			—			5,808
Long-term debt to affiliates	—			5,600			—			—			—			5,600
Long-term debt	—			14,010			335			—			—			14,345
Long-term financial obligation	—			—			365			2,131			—			2,496
Deferred tax liabilities	—			—			4,689			—			(44		)	4,645
Deferred rents	—			—			2,113			—			—			2,113
Negative carrying value of subsidiaries, net	—			—			779			—			(779		)	—
Intercompany payables	201			183			—			34			(418		)	—
Other long-term liabilities	—			13			688			—			—			701
Total long-term liabilities	201			19,806			8,969			2,165			(1,241		)	29,900
Total stockholders' equity	14,245			11,484			29,666			(1,322		)	(39,828		)	14,245
Total liabilities and stockholders' equity	$	14,446		$	31,845		$	43,772		$	959		$	(41,069	)	$	49,953
Schedule of Condensed Consolidating Statement of Comprehensive Income (Loss) Information	'
	Condensed Consolidating Statement of Comprehensive Income (Loss) Information
	Three Months Ended June 30, 2014
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Revenues
	Service revenues	$	—		$	—		$	5,259		$	323		$	(98	)	$	5,484
	Equipment sales	—			—			1,768			—			(168		)	1,600
	Other revenues	—			—			70			34			(3		)	101
	Total revenues	—			—			7,097			357			(269		)	7,185
	Operating expenses
	Cost of services	—			—			1,447			6			—			1,453
	Cost of equipment sales	—			—			2,188			207			(180		)	2,215
	Selling, general and administrative	—			—			2,116			124			(89		)	2,151
	Depreciation and amortization	—			—			1,108			21			—			1,129
	MetroPCS transaction and integration costs	—			—			22			—			—			22
	Restructuring costs	—			—			—			—			—			—
	Other, net	—			—			(747		)	—			—			(747		)
	Total operating expenses	—			—			6,134			358			(269		)	6,223
	Operating income (loss)	—			—			963			(1		)	—			962
	Other income (expense)
	Interest expense to affiliates	—			(85		)	—			—			—			(85		)
	Interest expense	—			(212		)	(15		)	(44		)	—			(271		)
	Interest income	—			—			83			—			—			83
	Other income (expense), net	—			(14		)	2			—			—			(12		)
	Total other income (expense), net	—			(311		)	70			(44		)	—			(285		)
	Income (loss) before income taxes	—			(311		)	1,033			(45		)	—			677
	Income tax expense (benefit)	—			—			306			(20		)	—			286
	Earnings (loss) of subsidiaries	391			702			(12		)	—			(1,081		)	—
	Net income (loss)	391			391			715			(25		)	(1,081		)	391
	Other comprehensive loss, net of tax	—			—			—			—			—			—
	Total comprehensive income (loss)	$	391		$	391		$	715		$	(25	)	$	(1,081	)	$	391
	Condensed Consolidating Statement of Comprehensive Income (Loss) Information
	Three Months Ended June 30, 2013
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Revenues
	Service revenues	$	—		$	—		$	4,591		$	191		$	(26	)	$	4,756
	Equipment sales	—			—			1,542			—			(163		)	1,379
	Other revenues	—			—			85			44			(36		)	93
	Total revenues	—			—			6,218			235			(225		)	6,228
	Operating expenses
	Cost of services	—			—			1,342			21			(36		)	1,327
	Cost of equipment sales	—			—			1,994			122			(180		)	1,936
	Selling, general and administrative	—			—			1,821			35			(9		)	1,847
	Depreciation and amortization	—			—			867			21			—			888
	MetroPCS transaction and integration costs	—			—			26			—			—			26
	Restructuring costs	—			—			23			—			—			23
	Total operating expenses	—			—			6,073			199			(225		)	6,047
	Operating income	—			—			145			36			—			181
	Other income (expense)
	Interest expense to affiliates	—			(225		)	—			—			—			(225		)
	Interest expense	—			(53		)	(13		)	(43		)	—			(109		)
	Interest income	—			—			40			—			—			40
	Other income (expense), net	—			120			(2		)	—			—			118
	Total other income (expense), net	—			(158		)	25			(43		)	—			(176		)
	Income (loss) before income taxes	—			(158		)	170			(7		)	—			5
	Income tax expense (benefit)	—			—			28			(7		)	—			21
	Earnings (loss) of subsidiaries	(47		)	142			(15		)	—			(80		)	—
	Net income (loss)	(47		)	(16		)	127			—			(80		)	(16		)
	Other comprehensive income (loss), net of tax	—			(38		)	23			—			(23		)	(38		)
	Total comprehensive income (loss)	$	(47	)	$	(54	)	$	150		$	—		$	(103	)	$	(54	)
	Condensed Consolidating Statement of Comprehensive Income (Loss) Information
	Six Months Ended June 30, 2014
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Revenues
Service revenues	$	—		$	—		$	10,409		$	588		$	(176	)	$	10,821
Equipment sales	—			—			3,365			—			(317		)	3,048
Other revenues	—			—			128			68			(5		)	191
Total revenues	—			—			13,902			656			(498		)	14,060
Operating expenses
Cost of services	—			—			2,907			10			—			2,917
Cost of equipment sales	—			—			4,501			345			(345		)	4,501
Selling, general and administrative	—			—			4,176			224			(153		)	4,247
Depreciation and amortization	—			—			2,143			41			—			2,184
MetroPCS transaction and integration costs	—			—			34			—			—			34
Other, net	—			—			(757		)	—			—			(757		)
Total operating expenses	—			—			13,004			620			(498		)	13,126
Operating income	—			—			898			36			—			934
Other income (expense)
Interest expense to affiliates	—			(103		)	—			—			—			(103		)
Interest expense	—			(426		)	(33		)	(88		)	—			(547		)
Interest income	—			—			158			—			—			158
Other income (expense), net	—			(22		)	4			—			—			(18		)
Total other income (expense), net	—			(551		)	129			(88		)	—			(510		)
Income (loss) before income taxes	—			(551		)	1,027			(52		)	—			424
Income tax expense (benefit)	—			—			206			(22		)	—			184
Earnings (loss) of subsidiaries	240			791			(27		)	—			(1,004		)	—
Net income (loss)	240			240			794			(30		)	(1,004		)	240
Other comprehensive loss, net of tax	(3		)	(3		)	(3		)	—			6			(3		)
Total comprehensive income (loss)	$	237		$	237		$	791		$	(30	)	$	(998	)	$	237
Condensed Consolidating Statement of Comprehensive Income (Loss) Information
Six Months Ended June 30, 2013
(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
Revenues
Service revenues	$	—		$	—		$	8,447		$	367		$	(52	)	$	8,762
Equipment sales	—			—			2,308			—			(324		)	1,984
Other revenues	—			—			141			86			(68		)	159
Total revenues	—			—			10,896			453			(444		)	10,905
Operating expenses
Cost of services	—			—			2,464			40			(68		)	2,436
Cost of equipment sales	—			—			2,926			251			(355		)	2,822
Selling, general and administrative	—			—			3,303			71			(21		)	3,353
Depreciation and amortization	—			—			1,602			41			—			1,643
MetroPCS transaction and integration costs	—			—			39			—			—			39
Restructuring costs	—			—			54			—			—			54
Other, net	—			—			(2		)	—			—			(2		)
Total operating expenses	—			—			10,386			403			(444		)	10,345
Operating income	—			—			510			50			—			560
Other income (expense)
Interest expense to affiliates	—			(403		)	—			—			—			(403		)
Interest expense	—			(54		)	(20		)	(86		)	—			(160		)
Interest income	—			—			75			—			—			75
Other income (expense), net	—			114			(2		)	—			—			112
Total other income (expense), net	—			(343		)	53			(86		)	—			(376		)
Income (loss) before income taxes	—			(343		)	563			(36		)	—			184
Income tax expense (benefit)	—			—			109			(16		)	—			93
Earnings (loss) of subsidiaries	(47		)	434			(29		)	—			(358		)	—
Net income (loss)	(47		)	91			425			(20		)	(358		)	91
Other comprehensive income (loss), net of tax	—			(39		)	24			—			(24		)	(39		)
Total comprehensive income (loss)	$	(47	)	$	52		$	449		$	(20	)	$	(382	)	$	52
Schedule of Condensed Consolidating Statement of Cash Flows Information	'
	Condensed Consolidating Statement of Cash Flows Information
	Six Months Ended June 30, 2014
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Operating activities
	Net cash provided by (used in) operating activities	$	5		$	(2,898	)	$	4,567		$	55		$	—		$	1,729
	Investing activities
	Purchases of property and equipment	—			—			(1,887		)	—			—			(1,887		)
	Purchases of spectrum licenses and other intangible assets	—			—			(2,367		)	—			—			(2,367		)
	Investment in subsidiaries	(1,700		)	—			—			—			1,700			—
	Investments in unconsolidated affiliates, net	—			—			(20		)	—			—			(20		)
	Other, net	—			—			(1		)	—			—			(1		)
	Net cash used in investing activities	(1,700		)	—			(4,275		)	—			1,700			(4,275		)
	Financing activities
	Proceeds from capital contribution	—			1,700			—			—			(1,700		)	—
	Repayments of short-term debt for purchases of property and equipment	—			—			(231		)	—			—			(231		)
	Taxes paid related to net share settlement of stock awards	—			—			(72		)	—			—			(72		)
	Excess tax benefit from stock-based compensation	—			—			33			—			—			33
	Proceeds from exercise of stock options	23			—			—			—			—			23
	Other, net	—			—			(18		)	—			—			(18		)
	Net cash provided by (used in) financing activities	23			1,700			(288		)	—			(1,700		)	(265		)
	Change in cash and cash equivalents	(1,672		)	(1,198		)	4			55			—			(2,811		)
	Cash and cash equivalents
	Beginning of period	2,960			2,698			57			176			—			5,891
	End of period	$	1,288		$	1,500		$	61		$	231		$	—		$	3,080
	Condensed Consolidating Statement of Cash Flows Information
	Six Months Ended June 30, 2013
	(in millions)	Parent			Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidating and Eliminating Adjustments			Consolidated
	Operating activities
	Net cash provided by (used in) operating activities	$	298		$	(386	)	$	1,769		$	34		$	—		$	1,715
	Investing activities
	Purchases of property and equipment	—			—			(2,126		)	—			—			(2,126		)
	Purchases of spectrum licenses and other intangible assets	—			—			(51		)	—			—			(51		)
	Short term affiliate loan receivable, net	—			—			300			—			—			300
	Cash and cash equivalents acquired in MetroPCS business combination	737			1,407			—			—			—			2,144
	Other, net	—			—			(5		)	—			—			(5		)
	Net cash provided by (used in) investing activities	737			1,407			(1,882		)	—			—			262
	Financing activities
	Repayments related to a variable interest entity	—			—			(40		)	—			—			(40		)
	Distribution to affiliate	—			—			(41		)	—			—			(41		)
	Excess tax benefit from stock-based compensation	—			—			3			—			—			3
	Proceeds from exercise of stock options	72			—			—			—			—			72
	Other, net	—			—			(3		)	—			—			(3		)
	Net cash provided by (used in) financing activities	72			—			(81		)	—			—			(9		)
	Change in cash and cash equivalents	1,107			1,021			(194		)	34			—			1,968
	Cash and cash equivalents
	Beginning of period	—			—			287			107			—			394
	End of period	$	1,107		$	1,021		$	93		$	141		$	—		$	2,362

Acquisitions_and_Other_Transac1

Acquisitions and Other Transactions (Spectrum License Transactions) (Details) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
			Spectrum License Transactions - AWS and PCS [Member]	Spectrum License Transaction - 700 MHz A-Block, AWS and PCS [Member]	Spectrum License Transaction - 700 MHz A-Block, AWS and PCS [Member]	Other, Net [Member]	Other, Net [Member]	Other, Net [Member]	Other, Net [Member]
						Spectrum License Transactions - AWS and PCS [Member]	Spectrum License Transactions - AWS and PCS [Member]	Spectrum License Transaction - 700 MHz A-Block, AWS and PCS [Member]	Spectrum License Transaction - 700 MHz A-Block, AWS and PCS [Member]
Cash payment to acquire spectrum license	$2,367	$51	'	'	$2,400	'	'	'	'
Fair value of spectrum licenses acquired	'	'	792	3,700	'	'	'	'	'
Non-cash gain on spectrum transaction	'	'	'	'	'	$214	$214	$517	$517

Acquisitions_and_Other_Transac2

Acquisitions and Other Transactions (Factoring Arrangement) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
In Millions, unless otherwise specified			Factoring Arrangement [Member]	Factoring Arrangement [Member]	Factoring Arrangement [Member]
					Variable Interest Entity, Not Primary Beneficiary [Member]
Maximum funding limit	'	'	$500	$500	'
Derecognized net receivables	'	'	611	611	'
Net cash proceeds	'	'	'	468	'
Deferred purchase price	'	'	236	236	'
Accounts payable and accrued liabilities	'	'	101	101	'
Other current liabilities	621	353	23	23	'
Net expense	'	'	77	90	'
Maximum exposure	'	'	'	'	$440

Acquisitions_and_Other_Transac3

Acquisitions and Other Transactions Short-Term Debt (Details) (Handset Financing Arrangement [Member], USD $)	Jun. 30, 2014
In Millions, unless otherwise specified
Handset Financing Arrangement [Member]	'
Short-term Debt	'
Borrowing capacity	$108

Equipment_Installment_Plan_Rec2

Equipment Installment Plan Receivables (EIP Receivables) (Details) (Equipment Installment Plan Receivable [Member], USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan, maximum payment terms	'24 months	'
Equipment installment plan receivables, gross	$4,029	$2,882
Equipment installment plan receivables, deferred interest and allowance for credit losses	-446	-336
Equipment installment plan receivables, net of deferred interest	3,709	2,606
Equipment installment plan receivables, net	3,583	2,546
Deferred Interest [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, deferred interest and allowance for credit losses	-320	-276
Allowances for Credit Losses [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, deferred interest and allowance for credit losses	-126	-60
Accounts Receivable, Net [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, net	2,190	1,471
Other Assets [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, net	$1,393	$1,075

Equipment_Installment_Plan_Rec3

Equipment Installment Plan Receivables (Gross Receivables by Credit Category) (Details) (Equipment Installment Plan Receivable [Member], USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, gross	$4,029	$2,882
Unbilled [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, current	3,856	2,752
Billed [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, current	119	90
Equipment installment plan receivables, past due	54	40
Prime [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, gross	2,137	1,542
Prime [Member] | Unbilled [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, current	2,058	1,482
Prime [Member] | Billed [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, current	59	45
Equipment installment plan receivables, past due	20	15
Subprime [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, gross	1,892	1,340
Subprime [Member] | Unbilled [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, current	1,798	1,270
Subprime [Member] | Billed [Member]	'	'
Equipment Installment Plan Receivables [Line Items]	'	'
Equipment installment plan receivables, current	60	45
Equipment installment plan receivables, past due	$34	$25

Equipment_Installment_Plan_Rec4

Equipment Installment Plan Receivables (Deferred Interest and Allowance for Credit Losses) (Details) (Equipment Installment Plan Receivable [Member], USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
		Deferred Interest, Long-term [Member]	Deferred Interest, Long-term [Member]
Equipment Installment Plan Receivables, Deferred Interest and Allowance for Credit Losses [Roll Forward]	'	'	'
Deferred interest and allowance for credit losses, beginning of period	$336	$64	$64
Bad debt expense	187	'	'
Write-offs, net of recoveries	-121	'	'
Change in deferred interest on short-term and long-term EIP receivables	44	'	'
Deferred interest and allowance for credit losses, end of period	$446	$64	$64

Fair_Value_Measurements_and_De2

Fair Value Measurements and Derivative Instruments (Narrative) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
In Billions, unless otherwise specified	derivative_instruments	derivative_instruments	derivative_instruments
Embedded Derivatives [Member]	'	'	'
Derivative Instruments [Line Items]	'	'	'
Number of embedded derivative agreements	5	5	'
Interest Rate Swaps [Member]	'	'	'
Derivative Instruments [Line Items]	'	'	'
Number of interest rate swap agreements	0	0	7
Notional amounts	'	'	$3.60
Cross Currency Interest Rate Swaps [Member]	'	'	'
Derivative Instruments [Line Items]	'	'	'
Number of cross currency interest rate swap agreements	0	0	3
Notional amounts	'	'	$2.30

Fair_Value_Measurements_and_De3

Fair Value Measurements and Derivative Instruments (Fair Value of Financial Instruments by Level) (Details) (Not Designated as Hedging Instrument [Member], Embedded Derivatives [Member], USD $)

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

In Millions, unless otherwise specified

Other Current Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Other Current Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Assets [Member]

Other Long-term Liabilities [Member]

Other Long-term Liabilities [Member]

Other Long-term Liabilities [Member]

Other Long-term Liabilities [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 1 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Derivative Instruments, Fair Value [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Embedded derivatives, assets

$14

$0

$0

$14

$27

$0

$0

$27

'

'

'

'

Embedded derivatives, liabilities

'

'

'

'

'

'

'

'

$13

$0

$0

$13

Fair_Value_Measurements_and_De4

Fair Value Measurements and Derivative Instruments (Effect Of Derivative Instruments On Earnings And Other Comprehensive Income) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Designated as Hedging Instrument [Member] | Cross Currency Interest Rate Swaps [Member] | Other Comprehensive Income (Loss) [Member]	'	'	'	'
Derivative Instruments [Line Items]	'	'	'	'
Gain (loss) on derivative instrument	$0	$57	$0	($17)
Designated as Hedging Instrument [Member] | Cross Currency Interest Rate Swaps [Member] | Interest Expense to Affiliates [Member]	'	'	'	'
Derivative Instruments [Line Items]	'	'	'	'
Gain (loss) on derivative instrument	0	48	0	53
Not Designated as Hedging Instrument [Member] | Embedded Derivatives [Member] | Interest Expense to Affiliates [Member]	'	'	'	'
Derivative Instruments [Line Items]	'	'	'	'
Gain (loss) on derivative instrument	-7	-5	54	-5
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Interest Expense to Affiliates [Member]	'	'	'	'
Derivative Instruments [Line Items]	'	'	'	'
Gain (loss) on derivative instrument	$0	$6	$0	$8

Fair_Value_Measurements_and_De5

Fair Value Measurements and Derivative Instruments (Fair Value of Long-term Debt) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Inputs, Level 1 [Member]	'	'
Long-Term Debt, Fair Value [Line Items]	'	'
Long-term debt	$14,597	$14,251
Fair Value, Inputs, Level 1 [Member] | Carrying Amount [Member]	'	'
Long-Term Debt, Fair Value [Line Items]	'	'
Long-term debt	13,600	13,600
Fair Value, Inputs, Level 2 [Member] | Deutsche Telekom [Member]	'	'
Long-Term Debt, Fair Value [Line Items]	'	'
Long-term debt	6,025	5,866
Fair Value, Inputs, Level 2 [Member] | Carrying Amount [Member] | Deutsche Telekom [Member]	'	'
Long-Term Debt, Fair Value [Line Items]	'	'
Long-term debt	$5,600	$5,600

Commitments_and_Contingencies_1

Commitments and Contingencies Purchase Commitments (Details) (Purchase Commitments [Member], USD $)	Jun. 30, 2014
In Millions, unless otherwise specified
Purchase Commitments [Member]	'
Twelve Months Ending June 30,	'
2015	$1,389
2016	1,691
2017	1,257
2018	24
2019	2
Thereafter	0
Total future minimum payments	$4,363

Commitments_and_Contingencies_2

Commitments and Contingencies Guarantee Liabilities (Details) (Handset Upgrade Program [Member], USD $)	Jun. 30, 2014	Dec. 31, 2013
Handset Upgrade Program [Member]	'	'
Guarantee Liabilities	'	'
Guarantee liabilities	$298,000,000	$191,000,000
Maximum exposure, related to guarantee liabilities	$2,100,000,000	'

Additional_Financial_Informati2

Additional Financial Information (Cash and Cash Equivalents) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Cash and Cash Equivalents [Abstract]	'	'
Restricted cash equivalents	$100	$100

Additional_Financial_Informati3

Additional Financial Information (Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Interest expense to affiliates	($85)	($225)	($103)	($403)
Other income, net	-12	118	-18	112
Income tax effect	-286	-21	-184	-93
Net income (loss)	391	-16	240	91
Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Net income (loss)	'	74	'	71
Cross Currency Interest Rate Swaps [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Interest expense to affiliates	'	-48	'	-53
Income tax effect	'	18	'	20
Net income (loss)	'	-30	'	-33
Foreign Currency Translation [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Other income, net	'	166	'	166
Income tax effect	'	-62	'	-62
Net income (loss)	'	$104	'	$104

Additional_Financial_Informati4

Additional Financial Information (Earnings (Loss) Per Share) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Net income (loss)	$391	($16)	$240	$91
Weighted average shares outstanding - basic	803,923,913	664,603,682	803,226,194	600,302,111
Dilutive effect of outstanding stock options and awards	9,632,224	0	9,676,941	1,392,800
Weighted average shares outstanding - diluted	813,556,137	664,603,682	812,903,135	601,694,911
Earnings (loss) per share - basic	$0.49	($0.02)	$0.30	$0.15
Earnings (loss) per share - diluted	$0.48	($0.02)	$0.30	$0.15
Stock Options [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Potentially dilutive outstanding securities	1,631,748	11,319,269	1,631,748	8,460,878
Restricted Stock Units (RSUs) and Performance Stock Units (PSUs) [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Potentially dilutive outstanding securities	65,108	22,911,491	87,816	22,911,491

Additional_Financial_Informati5

Additional Financial Information (Supplemental Cash Flows Information) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Additional Financial Information [Abstract]	'	'
Interest payments	$639	$583
Income tax payments	23	14
Increase in accounts payable for purchases of property and equipment	56	173
Short-term debt outstanding for financing of property and equipment purchases	250	193
Retirement of long-term debt to affiliates	0	14,450
Elimination of net unamortized discounts and premiums on long-term debt to affiliates	0	434
Issuance of new long-term debt to affiliates	0	11,200
Settlement of accounts receivable from affiliates and other outstanding balances	0	363
Income tax benefit from debt recapitalization	0	178
Net assets acquired in MetroPCS business combination, excluding cash acquired	$0	$827

Guarantor_Financial_Informatio2

Guarantor Financial Information (Narrative) (Details) (Parent [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Parent [Member]	'
Contribution to issuer	$1,700

Guarantor_Financial_Informatio3

Guarantor Financial Information (Condensed Consolidating Balance Sheet Information) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Current assets	'	'	'	'
Cash and cash equivalents	$3,080	$5,891	$2,362	$394
Accounts receivable, net	3,939	3,619	'	'
Accounts receivable from affiliates	87	41	'	'
Inventory	791	586	'	'
Current portion of deferred tax assets, net	820	839	'	'
Other current assets	1,179	1,252	'	'
Total current assets	9,896	12,228	'	'
Property and equipment, net of accumulated depreciation	15,537	15,349	'	'
Goodwill	1,683	1,683	'	'
Spectrum licenses	21,828	18,122	'	'
Other intangible assets, net of accumulated amortization	1,040	1,204	'	'
Investments in subsidiaries, net	0	0	'	'
Intercompany receivables	0	0	'	'
Other assets	1,680	1,367	'	'
Total assets	51,664	49,953	'	'
Current liabilities	'	'	'	'
Accounts payable and accrued liabilities	5,555	4,567	'	'
Current payables and short-term debt to affiliates	236	199	'	'
Short-term debt	272	244	'	'
Deferred revenue	447	445	'	'
Other current liabilities	621	353	'	'
Total current liabilities	7,131	5,808	'	'
Long-term debt to affiliates	5,600	5,600	'	'
Long-term debt	14,369	14,345	'	'
Long-term financial obligation	2,502	2,496	'	'
Deferred tax liabilities	4,757	4,645	'	'
Deferred rents	2,237	2,113	'	'
Negative carrying value of subsidiaries, net	0	0	'	'
Intercompany payables	0	0	'	'
Other long-term liabilities	505	701	'	'
Total long-term liabilities	29,970	29,900	'	'
Total stockholders' equity	14,563	14,245	'	'
Total liabilities and stockholders' equity	51,664	49,953	'	'
Consolidating and Eliminating Adjustments [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0	'	'
Accounts receivable from affiliates	0	0	'	'
Inventory	0	0	'	'
Current portion of deferred tax assets, net	0	0	'	'
Other current assets	0	0	'	'
Total current assets	0	0	'	'
Property and equipment, net of accumulated depreciation	0	0	'	'
Goodwill	0	0	'	'
Spectrum licenses	0	0	'	'
Other intangible assets, net of accumulated amortization	0	0	'	'
Investments in subsidiaries, net	-43,509	-40,607	'	'
Intercompany receivables	-2,172	-418	'	'
Other assets	-72	-44	'	'
Total assets	-45,753	-41,069	'	'
Current liabilities	'	'	'	'
Accounts payable and accrued liabilities	0	0	'	'
Current payables and short-term debt to affiliates	0	0	'	'
Short-term debt	0	0	'	'
Deferred revenue	0	0	'	'
Other current liabilities	0	0	'	'
Total current liabilities	0	0	'	'
Long-term debt to affiliates	0	0	'	'
Long-term debt	0	0	'	'
Long-term financial obligation	0	0	'	'
Deferred tax liabilities	-72	-44	'	'
Deferred rents	0	0	'	'
Negative carrying value of subsidiaries, net	-804	-779	'	'
Intercompany payables	-2,172	-418	'	'
Other long-term liabilities	0	0	'	'
Total long-term liabilities	-3,048	-1,241	'	'
Total stockholders' equity	-42,705	-39,828	'	'
Total liabilities and stockholders' equity	-45,753	-41,069	'	'
Parent [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	1,288	2,960	1,107	0
Accounts receivable, net	0	0	'	'
Accounts receivable from affiliates	0	0	'	'
Inventory	0	0	'	'
Current portion of deferred tax assets, net	0	0	'	'
Other current assets	0	0	'	'
Total current assets	1,288	2,960	'	'
Property and equipment, net of accumulated depreciation	0	0	'	'
Goodwill	0	0	'	'
Spectrum licenses	0	0	'	'
Other intangible assets, net of accumulated amortization	0	0	'	'
Investments in subsidiaries, net	13,455	11,484	'	'
Intercompany receivables	0	0	'	'
Other assets	2	2	'	'
Total assets	14,745	14,446	'	'
Current liabilities	'	'	'	'
Accounts payable and accrued liabilities	0	0	'	'
Current payables and short-term debt to affiliates	0	0	'	'
Short-term debt	0	0	'	'
Deferred revenue	0	0	'	'
Other current liabilities	0	0	'	'
Total current liabilities	0	0	'	'
Long-term debt to affiliates	0	0	'	'
Long-term debt	0	0	'	'
Long-term financial obligation	0	0	'	'
Deferred tax liabilities	0	0	'	'
Deferred rents	0	0	'	'
Negative carrying value of subsidiaries, net	0	0	'	'
Intercompany payables	182	201	'	'
Other long-term liabilities	0	0	'	'
Total long-term liabilities	182	201	'	'
Total stockholders' equity	14,563	14,245	'	'
Total liabilities and stockholders' equity	14,745	14,446	'	'
Issuer [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	1,500	2,698	1,021	0
Accounts receivable, net	0	0	'	'
Accounts receivable from affiliates	0	0	'	'
Inventory	0	0	'	'
Current portion of deferred tax assets, net	0	0	'	'
Other current assets	14	0	'	'
Total current assets	1,514	2,698	'	'
Property and equipment, net of accumulated depreciation	0	0	'	'
Goodwill	0	0	'	'
Spectrum licenses	0	0	'	'
Other intangible assets, net of accumulated amortization	0	0	'	'
Investments in subsidiaries, net	29,942	29,123	'	'
Intercompany receivables	2,172	0	'	'
Other assets	50	24	'	'
Total assets	33,678	31,845	'	'
Current liabilities	'	'	'	'
Accounts payable and accrued liabilities	334	273	'	'
Current payables and short-term debt to affiliates	56	56	'	'
Short-term debt	250	226	'	'
Deferred revenue	0	0	'	'
Other current liabilities	0	0	'	'
Total current liabilities	640	555	'	'
Long-term debt to affiliates	5,600	5,600	'	'
Long-term debt	13,983	14,010	'	'
Long-term financial obligation	0	0	'	'
Deferred tax liabilities	0	0	'	'
Deferred rents	0	0	'	'
Negative carrying value of subsidiaries, net	0	0	'	'
Intercompany payables	0	183	'	'
Other long-term liabilities	0	13	'	'
Total long-term liabilities	19,583	19,806	'	'
Total stockholders' equity	13,455	11,484	'	'
Total liabilities and stockholders' equity	33,678	31,845	'	'
Guarantor Subsidiaries [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	61	57	93	287
Accounts receivable, net	3,782	3,541	'	'
Accounts receivable from affiliates	87	41	'	'
Inventory	791	586	'	'
Current portion of deferred tax assets, net	805	824	'	'
Other current assets	909	1,250	'	'
Total current assets	6,435	6,299	'	'
Property and equipment, net of accumulated depreciation	14,982	14,754	'	'
Goodwill	1,683	1,683	'	'
Spectrum licenses	21,828	18,122	'	'
Other intangible assets, net of accumulated amortization	1,040	1,204	'	'
Investments in subsidiaries, net	112	0	'	'
Intercompany receivables	0	418	'	'
Other assets	1,618	1,292	'	'
Total assets	47,698	43,772	'	'
Current liabilities	'	'	'	'
Accounts payable and accrued liabilities	4,907	4,218	'	'
Current payables and short-term debt to affiliates	180	143	'	'
Short-term debt	22	18	'	'
Deferred revenue	447	445	'	'
Other current liabilities	598	313	'	'
Total current liabilities	6,154	5,137	'	'
Long-term debt to affiliates	0	0	'	'
Long-term debt	386	335	'	'
Long-term financial obligation	367	365	'	'
Deferred tax liabilities	4,829	4,689	'	'
Deferred rents	2,237	2,113	'	'
Negative carrying value of subsidiaries, net	804	779	'	'
Intercompany payables	1,929	0	'	'
Other long-term liabilities	505	688	'	'
Total long-term liabilities	11,057	8,969	'	'
Total stockholders' equity	30,487	29,666	'	'
Total liabilities and stockholders' equity	47,698	43,772	'	'
Non-Guarantor Subsidiaries [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	231	176	141	107
Accounts receivable, net	157	78	'	'
Accounts receivable from affiliates	0	0	'	'
Inventory	0	0	'	'
Current portion of deferred tax assets, net	15	15	'	'
Other current assets	256	2	'	'
Total current assets	659	271	'	'
Property and equipment, net of accumulated depreciation	555	595	'	'
Goodwill	0	0	'	'
Spectrum licenses	0	0	'	'
Other intangible assets, net of accumulated amortization	0	0	'	'
Investments in subsidiaries, net	0	0	'	'
Intercompany receivables	0	0	'	'
Other assets	82	93	'	'
Total assets	1,296	959	'	'
Current liabilities	'	'	'	'
Accounts payable and accrued liabilities	314	76	'	'
Current payables and short-term debt to affiliates	0	0	'	'
Short-term debt	0	0	'	'
Deferred revenue	0	0	'	'
Other current liabilities	23	40	'	'
Total current liabilities	337	116	'	'
Long-term debt to affiliates	0	0	'	'
Long-term debt	0	0	'	'
Long-term financial obligation	2,135	2,131	'	'
Deferred tax liabilities	0	0	'	'
Deferred rents	0	0	'	'
Negative carrying value of subsidiaries, net	0	0	'	'
Intercompany payables	61	34	'	'
Other long-term liabilities	0	0	'	'
Total long-term liabilities	2,196	2,165	'	'
Total stockholders' equity	-1,237	-1,322	'	'
Total liabilities and stockholders' equity	$1,296	$959	'	'

Guarantor_Financial_Informatio4

Guarantor Financial Information (Condensed Consolidating Statement of Comprehensive Income (Loss) Information) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues	'	'	'	'
Service revenues	$5,484	$4,756	$10,821	$8,762
Equipment sales	1,600	1,379	3,048	1,984
Other revenues	101	93	191	159
Total revenues	7,185	6,228	14,060	10,905
Operating expenses	'	'	'	'
Cost of services, exclusive of depreciation and amortization shown separately below	1,453	1,327	2,917	2,436
Cost of equipment sales	2,215	1,936	4,501	2,822
Selling, general and administrative	2,151	1,847	4,247	3,353
Depreciation and amortization	1,129	888	2,184	1,643
MetroPCS transaction and integration costs	22	26	34	39
Restructuring costs	0	23	0	54
Other, net	-747	0	-757	-2
Total operating expenses	6,223	6,047	13,126	10,345
Operating income	962	181	934	560
Operating expenses	'	'	'	'
Interest expense to affiliates	-85	-225	-103	-403
Interest expense	-271	-109	-547	-160
Interest income	83	40	158	75
Other income (expense), net	-12	118	-18	112
Total other expense, net	-285	-176	-510	-376
Income before income taxes	677	5	424	184
Income tax expense	286	21	184	93
Earnings (loss) of subsidiaries	0	0	0	0
Net income (loss)	391	-16	240	91
Other comprehensive loss, net of tax	0	-38	-3	-39
Total comprehensive income (loss)	391	-54	237	52
Consolidating and Eliminating Adjustments [Member]	'	'	'	'
Revenues	'	'	'	'
Service revenues	-98	-26	-176	-52
Equipment sales	-168	-163	-317	-324
Other revenues	-3	-36	-5	-68
Total revenues	-269	-225	-498	-444
Operating expenses	'	'	'	'
Cost of services, exclusive of depreciation and amortization shown separately below	0	-36	0	-68
Cost of equipment sales	-180	-180	-345	-355
Selling, general and administrative	-89	-9	-153	-21
Depreciation and amortization	0	0	0	0
MetroPCS transaction and integration costs	0	0	0	0
Restructuring costs	0	0	'	0
Other, net	0	'	0	0
Total operating expenses	-269	-225	-498	-444
Operating income	0	0	0	0
Operating expenses	'	'	'	'
Interest expense to affiliates	0	0	0	0
Interest expense	0	0	0	0
Interest income	0	0	0	0
Other income (expense), net	0	0	0	0
Total other expense, net	0	0	0	0
Income before income taxes	0	0	0	0
Income tax expense	0	0	0	0
Earnings (loss) of subsidiaries	-1,081	-80	-1,004	-358
Net income (loss)	-1,081	-80	-1,004	-358
Other comprehensive loss, net of tax	0	-23	6	-24
Total comprehensive income (loss)	-1,081	-103	-998	-382
Parent [Member]	'	'	'	'
Revenues	'	'	'	'
Service revenues	0	0	0	0
Equipment sales	0	0	0	0
Other revenues	0	0	0	0
Total revenues	0	0	0	0
Operating expenses	'	'	'	'
Cost of services, exclusive of depreciation and amortization shown separately below	0	0	0	0
Cost of equipment sales	0	0	0	0
Selling, general and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
MetroPCS transaction and integration costs	0	0	0	0
Restructuring costs	0	0	'	0
Other, net	0	'	0	0
Total operating expenses	0	0	0	0
Operating income	0	0	0	0
Operating expenses	'	'	'	'
Interest expense to affiliates	0	0	0	0
Interest expense	0	0	0	0
Interest income	0	0	0	0
Other income (expense), net	0	0	0	0
Total other expense, net	0	0	0	0
Income before income taxes	0	0	0	0
Income tax expense	0	0	0	0
Earnings (loss) of subsidiaries	391	-47	240	-47
Net income (loss)	391	-47	240	-47
Other comprehensive loss, net of tax	0	0	-3	0
Total comprehensive income (loss)	391	-47	237	-47
Issuer [Member]	'	'	'	'
Revenues	'	'	'	'
Service revenues	0	0	0	0
Equipment sales	0	0	0	0
Other revenues	0	0	0	0
Total revenues	0	0	0	0
Operating expenses	'	'	'	'
Cost of services, exclusive of depreciation and amortization shown separately below	0	0	0	0
Cost of equipment sales	0	0	0	0
Selling, general and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
MetroPCS transaction and integration costs	0	0	0	0
Restructuring costs	0	0	'	0
Other, net	0	'	0	0
Total operating expenses	0	0	0	0
Operating income	0	0	0	0
Operating expenses	'	'	'	'
Interest expense to affiliates	-85	-225	-103	-403
Interest expense	-212	-53	-426	-54
Interest income	0	0	0	0
Other income (expense), net	-14	120	-22	114
Total other expense, net	-311	-158	-551	-343
Income before income taxes	-311	-158	-551	-343
Income tax expense	0	0	0	0
Earnings (loss) of subsidiaries	702	142	791	434
Net income (loss)	391	-16	240	91
Other comprehensive loss, net of tax	0	-38	-3	-39
Total comprehensive income (loss)	391	-54	237	52
Guarantor Subsidiaries [Member]	'	'	'	'
Revenues	'	'	'	'
Service revenues	5,259	4,591	10,409	8,447
Equipment sales	1,768	1,542	3,365	2,308
Other revenues	70	85	128	141
Total revenues	7,097	6,218	13,902	10,896
Operating expenses	'	'	'	'
Cost of services, exclusive of depreciation and amortization shown separately below	1,447	1,342	2,907	2,464
Cost of equipment sales	2,188	1,994	4,501	2,926
Selling, general and administrative	2,116	1,821	4,176	3,303
Depreciation and amortization	1,108	867	2,143	1,602
MetroPCS transaction and integration costs	22	26	34	39
Restructuring costs	0	23	'	54
Other, net	-747	'	-757	-2
Total operating expenses	6,134	6,073	13,004	10,386
Operating income	963	145	898	510
Operating expenses	'	'	'	'
Interest expense to affiliates	0	0	0	0
Interest expense	-15	-13	-33	-20
Interest income	83	40	158	75
Other income (expense), net	2	-2	4	-2
Total other expense, net	70	25	129	53
Income before income taxes	1,033	170	1,027	563
Income tax expense	306	28	206	109
Earnings (loss) of subsidiaries	-12	-15	-27	-29
Net income (loss)	715	127	794	425
Other comprehensive loss, net of tax	0	23	-3	24
Total comprehensive income (loss)	715	150	791	449
Non-Guarantor Subsidiaries [Member]	'	'	'	'
Revenues	'	'	'	'
Service revenues	323	191	588	367
Equipment sales	0	0	0	0
Other revenues	34	44	68	86
Total revenues	357	235	656	453
Operating expenses	'	'	'	'
Cost of services, exclusive of depreciation and amortization shown separately below	6	21	10	40
Cost of equipment sales	207	122	345	251
Selling, general and administrative	124	35	224	71
Depreciation and amortization	21	21	41	41
MetroPCS transaction and integration costs	0	0	0	0
Restructuring costs	0	0	'	0
Other, net	0	'	0	0
Total operating expenses	358	199	620	403
Operating income	-1	36	36	50
Operating expenses	'	'	'	'
Interest expense to affiliates	0	0	0	0
Interest expense	-44	-43	-88	-86
Interest income	0	0	0	0
Other income (expense), net	0	0	0	0
Total other expense, net	-44	-43	-88	-86
Income before income taxes	-45	-7	-52	-36
Income tax expense	-20	-7	-22	-16
Earnings (loss) of subsidiaries	0	0	0	0
Net income (loss)	-25	0	-30	-20
Other comprehensive loss, net of tax	0	0	0	0
Total comprehensive income (loss)	($25)	$0	($30)	($20)

Guarantor_Financial_Informatio5

Guarantor Financial Information (Condensed Consolidating Statement of Cash Flows Information) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities	'	'
Net cash provided by operating activities	$1,729	$1,715
Investing activities	'	'
Purchases of property and equipment	-1,887	-2,126
Purchases of spectrum licenses and other intangible assets	-2,367	-51
Investment in subsidiaries	0	'
Short term affiliate loan receivable, net	0	300
Cash and cash equivalents acquired in MetroPCS business combination	0	2,144
Investments in unconsolidated affiliates, net	-20	0
Other, net	-1	-5
Net cash provided by (used in) investing activities	-4,275	262
Financing activities	'	'
Proceeds from capital contribution	0	'
Repayments of short-term debt for purchases of property and equipment	-231	0
Repayments related to a variable interest entity	0	-40
Distribution to affiliate	0	-41
Taxes paid related to net share settlement of stock awards	-72	0
Excess tax benefit from stock-based compensation	33	3
Proceeds from exercise of stock options	23	72
Other, net	-18	-3
Net cash used in financing activities	-265	-9
Change in cash and cash equivalents	-2,811	1,968
Beginning of period	5,891	394
End of period	3,080	2,362
Consolidating and Eliminating Adjustments [Member]	'	'
Operating activities	'	'
Net cash provided by operating activities	0	0
Investing activities	'	'
Purchases of property and equipment	0	0
Purchases of spectrum licenses and other intangible assets	0	0
Investment in subsidiaries	1,700	'
Short term affiliate loan receivable, net	'	0
Cash and cash equivalents acquired in MetroPCS business combination	'	0
Investments in unconsolidated affiliates, net	0	'
Other, net	0	0
Net cash provided by (used in) investing activities	1,700	0
Financing activities	'	'
Proceeds from capital contribution	-1,700	'
Repayments of short-term debt for purchases of property and equipment	0	'
Repayments related to a variable interest entity	'	0
Distribution to affiliate	'	0
Taxes paid related to net share settlement of stock awards	0	'
Excess tax benefit from stock-based compensation	0	0
Proceeds from exercise of stock options	0	0
Other, net	0	0
Net cash used in financing activities	-1,700	0
Change in cash and cash equivalents	0	0
Beginning of period	0	0
End of period	0	0
Parent [Member]	'	'
Operating activities	'	'
Net cash provided by operating activities	5	298
Investing activities	'	'
Purchases of property and equipment	0	0
Purchases of spectrum licenses and other intangible assets	0	0
Investment in subsidiaries	-1,700	'
Short term affiliate loan receivable, net	'	0
Cash and cash equivalents acquired in MetroPCS business combination	'	737
Investments in unconsolidated affiliates, net	0	'
Other, net	0	0
Net cash provided by (used in) investing activities	-1,700	737
Financing activities	'	'
Proceeds from capital contribution	0	'
Repayments of short-term debt for purchases of property and equipment	0	'
Repayments related to a variable interest entity	'	0
Distribution to affiliate	'	0
Taxes paid related to net share settlement of stock awards	0	'
Excess tax benefit from stock-based compensation	0	0
Proceeds from exercise of stock options	23	72
Other, net	0	0
Net cash used in financing activities	23	72
Change in cash and cash equivalents	-1,672	1,107
Beginning of period	2,960	0
End of period	1,288	1,107
Issuer [Member]	'	'
Operating activities	'	'
Net cash provided by operating activities	-2,898	-386
Investing activities	'	'
Purchases of property and equipment	0	0
Purchases of spectrum licenses and other intangible assets	0	0
Investment in subsidiaries	0	'
Short term affiliate loan receivable, net	'	0
Cash and cash equivalents acquired in MetroPCS business combination	'	1,407
Investments in unconsolidated affiliates, net	0	'
Other, net	0	0
Net cash provided by (used in) investing activities	0	1,407
Financing activities	'	'
Proceeds from capital contribution	1,700	'
Repayments of short-term debt for purchases of property and equipment	0	'
Repayments related to a variable interest entity	'	0
Distribution to affiliate	'	0
Taxes paid related to net share settlement of stock awards	0	'
Excess tax benefit from stock-based compensation	0	0
Proceeds from exercise of stock options	0	0
Other, net	0	0
Net cash used in financing activities	1,700	0
Change in cash and cash equivalents	-1,198	1,021
Beginning of period	2,698	0
End of period	1,500	1,021
Guarantor Subsidiaries [Member]	'	'
Operating activities	'	'
Net cash provided by operating activities	4,567	1,769
Investing activities	'	'
Purchases of property and equipment	-1,887	-2,126
Purchases of spectrum licenses and other intangible assets	-2,367	-51
Investment in subsidiaries	0	'
Short term affiliate loan receivable, net	'	300
Cash and cash equivalents acquired in MetroPCS business combination	'	0
Investments in unconsolidated affiliates, net	-20	'
Other, net	-1	-5
Net cash provided by (used in) investing activities	-4,275	-1,882
Financing activities	'	'
Proceeds from capital contribution	0	'
Repayments of short-term debt for purchases of property and equipment	-231	'
Repayments related to a variable interest entity	'	-40
Distribution to affiliate	'	-41
Taxes paid related to net share settlement of stock awards	-72	'
Excess tax benefit from stock-based compensation	33	3
Proceeds from exercise of stock options	0	0
Other, net	-18	-3
Net cash used in financing activities	-288	-81
Change in cash and cash equivalents	4	-194
Beginning of period	57	287
End of period	61	93
Non-Guarantor Subsidiaries [Member]	'	'
Operating activities	'	'
Net cash provided by operating activities	55	34
Investing activities	'	'
Purchases of property and equipment	0	0
Purchases of spectrum licenses and other intangible assets	0	0
Investment in subsidiaries	0	'
Short term affiliate loan receivable, net	'	0
Cash and cash equivalents acquired in MetroPCS business combination	'	0
Investments in unconsolidated affiliates, net	0	'
Other, net	0	0
Net cash provided by (used in) investing activities	0	0
Financing activities	'	'
Proceeds from capital contribution	0	'
Repayments of short-term debt for purchases of property and equipment	0	'
Repayments related to a variable interest entity	'	0
Distribution to affiliate	'	0
Taxes paid related to net share settlement of stock awards	0	'
Excess tax benefit from stock-based compensation	0	0
Proceeds from exercise of stock options	0	0
Other, net	0	0
Net cash used in financing activities	0	0
Change in cash and cash equivalents	55	34
Beginning of period	176	107
End of period	$231	$141

Subsequent_Events_Details

Subsequent Events (Details) (Subsequent Event [Member], USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Minimum [Member]	'
Subsequent Event [Line Items]	'
Network decommissioning, expected costs	$250
Maximum [Member]	'
Subsequent Event [Line Items]	'
Network decommissioning, expected costs	$300