Financial Instruments

9 Months Ended

Dec. 31, 2016

The Company carries certain assets and liabilities at fair value. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The three tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs based on the observability as of the measurement date, is as follows: quoted prices in active markets for identical assets or liabilities; observable inputs other than the quoted prices in active markets for identical assets and liabilities; and unobservable inputs for which there is little or no market data, which require the Company to develop assumptions of what market participants would use in pricing the asset or liability.

The carrying amount of cash and cash equivalents, accounts and notes receivable, and accounts payable approximates fair value. Short-term investments (consisting primarily of time deposits and commercial paper) are recorded at amortized cost, and the respective carrying amounts approximate fair value. Short-term investments totaled approximately $2.3 billion as of December 31, 2016 and Sprint did not hold any short-term investments as of March 31, 2016. The fair value of marketable equity securities totaling $50 million and $46 million as of December 31, 2016 and March 31, 2016, respectively, are measured on a recurring basis using quoted prices in active markets.

Except for our financing transaction with MLS, current and long-term debt and our other financings are carried at amortized cost. The Company elected to measure the financing obligation with MLS at fair value as a means to better reflect the economic substance of the arrangement. The Tranche 2 financing obligation, which amounted to $554 million at December 31, 2016 and is reported in "Current portion of long-term debt, financing and capital lease obligations" in our consolidated balance sheets, is the only eligible financial instrument for which we have elected the fair value option.

The fair value of the financing obligation, which was determined at the outset of the arrangement using a discounted cash flow model, was derived by unobservable inputs such as customer churn rates, customer upgrade probabilities, and the likelihood that Sprint will elect the Exchange Option versus the termination option upon a customer upgrade. Any gains or losses resulting from changes in the fair value of the financing obligation are included in “Other (expense) income, net” on the consolidated statements of comprehensive loss. During the nine-month period ended December 31, 2016, the change in fair value of the financing obligation resulted in a loss of approximately $30 million. During the nine-month period ended December 31, 2016, the payments made to MLS totaled $502 million.

The estimated fair value of the majority of our current and long-term debt, excluding our credit facilities, future lease receivables and borrowings under our Network Equipment Sale-Leaseback and Tranche 2 transactions, is determined based on quoted prices in active markets or by using other observable inputs that are derived principally from, or corroborated by, observable market data.

The following table presents carrying amounts and estimated fair values of current and long-term debt:



	Carrying amount at December 31, 2016		Estimated Fair Value Using Input Type
	Carrying amount at December 31, 2016		Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
	(in millions)
Current and long-term debt	$	36,870	$	29,457	$	4,391	$	4,758	$	38,606



	Carrying amount at March 31, 2016		Estimated Fair Value Using Input Type
	Carrying amount at March 31, 2016		Quoted prices in active markets		Observable		Unobservable		Total estimated fair value
	(in millions)
Current and long-term debt	$	33,645	$	21,757	$	4,474	$	2,130	$	28,361

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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