RAYTHEON CO/ | 2013 | FY | 3


Summary of Significant Accounting Policies
 
Consolidation and Classification—The consolidated financial statements include the accounts of Raytheon Company, and all wholly-owned, majority-owned and otherwise controlled domestic and foreign subsidiaries. All intercompany transactions have been eliminated. For classification of certain current assets and liabilities, we use the duration of the related contract or program as our operating cycle, which is generally longer than one year. In addition, certain prior year amounts have been reclassified to conform with the current year presentation. Effective April 1, 2013, we consolidated our structure into the following four businesses: Integrated Defense Systems (IDS); Intelligence, Information and Services (IIS); Missile Systems (MS); and Space and Airborne Systems (SAS). As used in these notes, the terms “we”, “us”, “our”, “Raytheon” and the “Company” mean Raytheon Company and its subsidiaries, unless the context indicates another meaning.
 
Use of Estimates—Our consolidated financial statements are based on the application of U.S. Generally Accepted Accounting Principles (GAAP), which require us to make estimates and assumptions about future events that affect the amounts reported in our consolidated financial statements and the accompanying notes. Future events and their effects cannot be determined with certainty. Therefore, the determination of estimates requires the exercise of judgment. Actual results could differ from those estimates, and any such differences may be material to our consolidated financial statements.
 
Revenue RecognitionWe use the percentage-of-completion accounting method to account for our long-term contracts associated with the design, development, manufacture, or modification of complex aerospace or electronic equipment and related services, such as certain cost-plus service contracts. Under this method, revenue is recognized based on the extent of progress towards completion of the long-term contract. Our analysis of these contracts also contemplates whether contracts should be combined or segmented in accordance with the applicable criteria under GAAP. We combine closely related contracts when all the applicable criteria under GAAP are met. The combination of two or more contracts requires judgment in determining whether the intent of entering into the contracts was effectively to enter into a single project, which should be combined to reflect an overall profit rate. Similarly, we may segment a project, which may consist of a single contract or group of contracts, with varying rates of profitability, only if the applicable criteria under GAAP are met. Judgment also is involved in determining whether a single contract or group of contracts may be segmented based on how the arrangement was negotiated and the performance criteria. The decision to combine a group of contracts or segment a contract could change the amount of revenue and gross profit recorded in a given period.
 
The selection of the method by which to measure progress towards completion of a contract also requires judgment and is based on the nature of the products or services to be provided. We generally use the cost-to-cost measure of progress for our long-term contracts unless we believe another method more clearly measures progress towards completion of the contract. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the contract. Contract costs include labor, materials and subcontractors costs, as well as an allocation of indirect costs. Revenues, including estimated fees or profits, are recorded as costs are incurred. Due to the nature of the work required to be performed on many of our contracts, the estimation of total revenue and cost at completion (the process for which we describe below in more detail) is complex and subject to many variables. Incentive and award fees generally are awarded at the discretion of the customer or upon achievement of certain program milestones or cost targets. Incentive and award fees, as well as penalties related to contract performance, are considered in estimating profit rates. Estimates of award fees are based on actual awards and anticipated performance, which may include the performance of subcontractors or partners depending on the individual contract requirements. Incentive provisions that increase or decrease earnings based solely on a single significant event generally are not recognized until the event occurs. Such incentives and penalties are recorded when there is sufficient information for us to assess anticipated performance. Our claims on contracts are recorded only if it is probable that the claim will result in additional contract revenue and the amounts can be reliably estimated.

We have a Company-wide standard and disciplined quarterly Estimate at Completion (EAC) process in which management reviews the progress and performance of our contracts. As part of this process, management reviews information including, but not limited to, any outstanding key contract matters, progress towards completion and the related program schedule, identified risks and opportunities, and the related changes in estimates of revenues and costs. The risks and opportunities include management's judgment about the ability and cost to achieve the schedule (e.g., the number and type of milestone events), technical requirements (e.g., a newly-developed product versus a mature product), and other contract requirements. Management must make assumptions and estimates regarding labor productivity and availability, the complexity of the work to be performed, the availability of materials, the length of time to complete the contract (e.g. to estimate increases in wages and prices for materials and related support cost allocations), performance by our subcontractors, the availability and timing of funding from our customer, and overhead cost rates, among other variables. These estimates also include the estimated cost of satisfying our industrial cooperation agreements, sometimes referred to as offset obligations, required under certain contracts. Based on this analysis, any quarterly adjustments to net sales, cost of sales, and the related impact to operating income are recognized as necessary in the period they become known. These adjustments may result from positive program performance, and may result in an increase in operating income during the performance of individual contracts, if we determine we will be successful in mitigating risks surrounding the technical, schedule, and cost aspects of those contracts or realizing related opportunities. Likewise, these adjustments may result in a decrease in operating income if we determine we will not be successful in mitigating these risks or realizing related opportunities. Changes in estimates of net sales, cost of sales, and the related impact to operating income are recognized quarterly on a cumulative catch-up basis, which recognizes in the current period the cumulative effect of the changes on current and prior periods based on a contract's percentage of completion. A significant change in one or more of these estimates could affect the profitability of one or more of our contracts. When estimates of total costs to be incurred on a contract exceed total estimates of revenue to be earned, a provision for the entire loss on the contract is recognized in the period the loss is determined.

Net EAC adjustments had the following impact on our operating results:
(In millions, except per share amounts)
2013

 
2012

 
2011

Operating income
$
557

 
$
613

 
$
548

Income from continuing operations attributable to Raytheon Company
362

 
398

 
348

Diluted EPS from continuing operations attributable to Raytheon Company
$
1.12

 
$
1.19

 
$
0.98


 
To a much lesser extent, we enter into other types of contracts such as service, commercial, or software and licensing arrangements. Revenue under fixed-price service contracts not associated with the design, development, manufacture, or modification of complex aerospace or electronic equipment, and under commercial contracts, generally is recognized upon delivery or as services are rendered once persuasive evidence of an arrangement exists, our price is fixed or determinable, and collectability is reasonably assured. Costs on fixed-price service contracts are expensed as incurred, unless they otherwise qualify for deferral. We recognize revenue on contracts to sell software when evidence of an arrangement exists, the software has been delivered and accepted by the customer, the fee is fixed or determinable, and collection is probable. For software arrangements that include multiple elements, including perpetual software licenses and undelivered items (e.g., maintenance and/or services; subscriptions/term licenses), we allocate and defer revenue for the undelivered items based on vendor specific objective evidence (VSOE) of the fair value of the undelivered elements, and recognize revenue on the perpetual license using the residual method. We base VSOE of each element on the price for which the undelivered element is sold separately. We determine fair value of the undelivered elements based on historical evidence of our stand-alone sales of these elements to third parties or from the stated renewal rate for the undelivered elements. When VSOE does not exist for undelivered items, we recognize the entire arrangement fee ratably over the applicable performance period. Revenue from non-software license fees is recognized over the expected life of the continued involvement with the customer. Additionally, royalty revenue is recognized when earned.
We apply the separation guidance under GAAP for contracts with multiple deliverables. We analyze revenue arrangements with multiple deliverables to determine if the deliverables should be divided into more than one unit of accounting. For contracts with more than one unit of accounting, we allocate the consideration we receive among the separate units of accounting based on their relative selling prices, which we determine based on prices of the deliverables as sold on a stand-alone basis, or if not sold on a stand-alone basis, the prices we would charge if sold on a stand-alone basis, and we recognize revenue for each deliverable based on the revenue recognition policies described above.

Research and Development Expenses—Research and development expenses are included in general and administrative expenses in our consolidated statements of operations. Expenditures for Company-sponsored research and development projects are expensed as incurred, and were $465 million, $451 million and $450 million in 2013, 2012 and 2011, respectively. Customer-sponsored research and development projects performed under contracts are accounted for as contract costs as the work is performed and included in contracts in process, net in our consolidated balance sheets.
 
Federal, Foreign and State Income Taxes—The Company and its domestic subsidiaries provide for federal income taxes on pretax accounting income at rates in effect under existing tax law. Foreign subsidiaries record provisions for income taxes at applicable foreign tax rates in a similar manner. Such provisions differ from the amounts currently payable because certain items of income and expense are recognized in different time periods for financial reporting purposes than for income tax purposes. The Company does not provide for a U.S. income tax liability on undistributed earnings of our foreign subsidiaries. Such earnings are indefinitely reinvested in foreign operations or expected to be remitted substantially free of additional tax. Payments made for state income taxes are included in administrative and selling expenses as these costs can generally be recovered through the pricing of products and services to the U.S. Government in the period in which the tax is payable. Accordingly, the state income tax provision (benefit) is allocated to contracts in future periods as described below in Deferred Contract Costs.
 
Other Expense (Income), Net—Other expense (income), net consists primarily of gains and losses from our investments held in rabbi trusts used to fund certain of our non-qualified deferred compensation plans, gains and losses on the early repurchase of long-term debt and certain financing fees.
 
Cash and Cash Equivalents—Cash and cash equivalents consist of cash and highly liquid investments with original maturities of 90 days or less at the date of purchase. The estimated fair value of cash and cash equivalents approximates the carrying value due to their short maturities.

Short-term Investments—We invest in marketable securities in accordance with our short-term investment policy and cash management strategy. At December 31, 2013, we had short-term investments consisting of highly rated bank certificates of deposit with a minimum long-term debt rating of A or A2 and a minimum short term debt rating of A-1 or P-1.

The fair value of our short term investments consisted of the following at December 31:
(In millions)
2013

 
2012

Short-term investments
$
1,001

 
$
856



The estimated fair value of our short-term investments approximates the carrying value due to their short maturities. These investments are deemed Level 2 assets under the fair value hierarchy for both 2013 and 2012, as their fair value is determined under a market approach using valuation models that utilize observable inputs, including maturity date, issue date, settlements date, and current rates. These marketable securities are classified as available-for-sale and are recorded at fair value as short-term investments in our consolidated balance sheets. The amortized cost of these securities closely approximated their fair value as of December 31, 2013. Unrealized gains and losses on our available-for-sale securities are recorded in accumulated other comprehensive loss (AOCL), net of tax. Realized gains and losses on sales of our available-for-sale securities are recorded in other (income) expense, net on our consolidated statement of operations. When determined, other than temporary declines in the value of available-for-sale securities are recorded as a loss in earnings. We make such determinations by considering, among other factors, the length of time the fair value of the investment has been less than the carrying value, future business prospects for the investee, and information regarding market and industry trends for the investee's business, if available. For purposes of computing realized gains and losses on available-for-sale securities, we determine cost on a specific identification basis. There were no securities deemed to have other than temporary declines in value for the twelve months ended December 31, 2013. In the twelve months ended December 31, 2013, we recorded an unrealized gain on short-term investments of less than $1 million, net of tax, in AOCL. In the twelve months ended December 31, 2013, we had sales of short-term investments of $325 million, which resulted in gains of approximately $1 million recorded in other (income) expense, net.

Contracts in Process, Net—Contracts in process, net are stated at cost plus estimated profit, but not in excess of estimated realizable value. Included in contracts in process are accounts receivable, which include amounts billed and due from customers. We maintain an allowance for doubtful accounts to provide for the estimated amount of accounts receivable that will not be collected. The allowance is based upon an assessment of customer creditworthiness, historical payment experience, the age of outstanding receivables and collateral to the extent applicable.
 
Deferred Contract Costs—Included in contracts in process, net are certain costs related to the performance of our U.S. Government contracts which are required to be recorded under GAAP but are not currently allocable to contracts. Such costs are deferred and primarily include a portion of our environmental expenses, asset retirement obligations, certain restructuring costs, deferred state income taxes, workers’ compensation and certain other accruals. At December 31, 2013 and December 31, 2012, net deferred contract costs were approximately $279 million and $65 million, respectively. These costs are allocated to contracts when they are paid or otherwise agreed. We regularly assess the probability of recovery of these costs. This assessment requires us to make assumptions about the extent of cost recovery under our contracts and the amount of future contract activity. If the level of backlog in the future does not support the continued deferral of these costs, the profitability of our remaining contracts could be adversely affected.
 
Pension and other postretirement benefits costs are allocated to our contracts as allowed costs based on the U.S. Government cost accounting standards (CAS). The CAS requirements for pension and other postretirement benefits costs differ from the financial accounting standards (FAS) requirements under GAAP. Given the inability to match with reasonable certainty individual expense and income items between the CAS and FAS requirements to determine specific recoverability, we have not estimated the incremental FAS income or expense to be recoverable under our expected future contract activity, and therefore did not defer any FAS expense for pension and other postretirement benefits plans in 20112013. This resulted in $249 million of expense, $255 million of expense, and $337 million of expense in 2013, 2012 and 2011, respectively, reflected in our consolidated results of operations for the difference between CAS and FAS requirements for our pension and other postretirement benefits plans in those years.

Inventories—Inventories are stated at cost (first-in, first-out or average cost), but not in excess of net realizable value. An impairment for excess or inactive inventory is recorded based upon an analysis that considers current inventory levels, historical usage patterns, future sales expectations and salvage value.
 
Inventories consisted of the following at December 31: 
(In millions)
2013

 
2012

Materials and purchased parts
$
73

 
$
74

Work in process
279

 
291

Finished goods
11

 
16

Total
$
363

 
$
381


 
We capitalize costs incurred in advance of contract award or funding in inventories if we determine that contract award or funding is probable. To the extent these are precontract costs, start-up costs have been excluded. We included capitalized precontract costs and other deferred costs of approximately $100 million in inventories as work in process at December 31, 2013 and December 31, 2012.
 
Property, Plant and Equipment, Net—Property, plant and equipment, net are stated at cost less accumulated depreciation. Major improvements are capitalized while expenditures for maintenance, repairs and minor improvements are expensed. We include gains and losses on the sales of plant and equipment that are allocable to our contracts in overhead as we generally can recover these costs through the pricing of products and services to the U.S. Government. For all other sales or asset retirements, the assets and related accumulated depreciation and amortization are eliminated from the accounts, and any resulting gain or loss is reflected in income.
 
Provisions for depreciation generally are computed using a combination of accelerated and straight-line methods and are based on estimated useful lives as follows: 
 
Years
Machinery and equipment
3–10
Buildings
20–45

 
Leasehold improvements are amortized over the lesser of the remaining life of the lease or the estimated useful life of the improvement.
 
Impairment of Goodwill and Long-lived Assets—We evaluate our goodwill for impairment annually or whenever events or circumstances indicate that the carrying value of goodwill may not be recoverable. We perform our annual impairment test as of the first day of the fourth quarter utilizing a two-step methodology that requires us to first identify potential goodwill impairment and then measure the amount of the related goodwill impairment loss, if any. We have identified our operating segments as reporting units under the impairment test assessment criteria outlined in GAAP. In performing our annual impairment test in the fourth quarters of 2013 and 2012, we did not identify any goodwill impairment. As part of our business consolidation in 2013, we reallocated goodwill to our reporting units on a relative fair value basis and performed an interim impairment test. There was no indication of impairment.
 
We determine whether long-lived assets are to be held for use or disposal. Upon indication of possible impairment of long-lived assets held for use, we evaluate the recoverability of such assets by measuring the carrying amount of the assets against the related estimated undiscounted future cash flows. When an evaluation indicates that the future undiscounted cash flows are not sufficient to recover the carrying value of the asset, the asset is adjusted to its estimated fair value. In order for long-lived assets to be considered held for disposal, we must have committed to a plan to dispose of the assets. Once deemed held for disposal, the assets are stated at the lower of the carrying amount or fair value.

Computer Software, Net—Internal use computer software, net, included in other assets, net, which consists primarily of our enterprise-wide software solutions, is stated at cost less accumulated amortization and is amortized using the straight-line method over its estimated useful life, generally 10 years.

Advance Payments and Billings in Excess of Costs Incurred—We receive advances, performance-based payments and progress payments from customers that may exceed costs incurred on certain contracts. We classify advance payments and billings in excess of costs incurred as current liabilities. Costs incurred in excess of billings are classified as contracts in process, net.
 
Other Comprehensive Income (Loss)—Other comprehensive income (loss) includes foreign exchange translation adjustments, gains and losses on derivative instruments qualified as cash flow hedges, unrealized gains (losses) on investments, and gains and losses associated with pension and other postretirement benefits. The computation of other comprehensive income (loss) and its components are presented in the consolidated statements of comprehensive income.

Other comprehensive income (loss) consisted of the following activity during the years ended December 31, 2013, 2012 and 2011:
 
Foreign exchange translation

 
Cash flow hedges and interest rate locks

 
Unrealized gains (losses) on investments and other, net

 
Pension and other employee benefit plans, net

 
Total

 
 
 
 
 
(In millions)
 
 
 
 
Balance at December 31, 2010
$
28

 
$
(7
)
 
$
(11
)
 
$
(5,156
)
 
$
(5,146
)
Before tax amount
(3
)
 
(9
)
 
3

 
(2,845
)
 
(2,854
)
Tax (expense) benefit

 
3

 
3

 
993

 
999

Net of tax amount
(3
)
 
(6
)
 
6

 
(1,852
)
 
(1,855
)
Balance at December 31, 2011
25

 
(13
)
 
(5
)
 
(7,008
)
 
(7,001
)
Before tax amount
35

 
13

 
(6
)
 
(1,275
)
 
(1,233
)
Tax (expense) benefit

 
(5
)
 
1

 
450

 
446

Net of tax amount
35

 
8

 
(5
)
 
(825
)
 
(787
)
Balance at December 31, 2012
60

 
(5
)
 
(10
)
 
(7,833
)
 
(7,788
)
Before tax amount
(13
)
 
(4
)
 
1

 
4,128

 
4,112

Tax (expense) benefit

 
1

 

 
(1,438
)
 
(1,437
)
Net of tax amount
(13
)
 
(3
)
 
1

 
2,690

 
2,675

Balance at December 31, 2013
$
47

 
$
(8
)
 
$
(9
)
 
$
(5,143
)
 
$
(5,113
)


Material amounts reclassified out of AOCL were related to amortization of net actuarial loss associated with our pension and other employee benefit plans and were $1,154 million, $942 million and $795 million before tax in 2013, 2012 and 2011, respectively. This component of AOCL is included in the calculation of net periodic pension expense (income) (see "Note 13: Pension and Other Employee Benefits" for additional details).

The defined benefit pension and other employee benefit plans are shown net of tax benefits of $2,780 million and $4,218 million at December 31, 2013 and December 31, 2012, respectively. The cash flow hedges and interest rate locks are shown net of tax benefits of $4 million and $2 million at December 31, 2013 and December 31, 2012, respectively. The unrealized gains on investments and other are shown net of tax benefits of $4 million at December 31, 2013 and December 31, 2012. We expect approximately $2 million of after-tax net unrealized losses on our cash flow hedges at December 31, 2013, to be reclassified into earnings at then-current values over the next twelve months as the underlying hedged transactions occur.
 
Translation of Foreign Currencies—Assets and liabilities of foreign subsidiaries are translated at current exchange rates and the effects of these translation adjustments are reported as a component of AOCL in equity. Deferred taxes are not recognized for translation-related temporary differences of foreign subsidiaries as their undistributed earnings are considered to be indefinitely reinvested. Income and expenses in foreign currencies are translated at the average exchange rate during the period. Foreign exchange transaction gains and losses in 2013, 2012 and 2011 were not material.
 
Treasury Stock—During 2012, our Board of Directors authorized the retirement of all outstanding treasury shares directly held by the Company. As a result, all outstanding treasury shares directly held by the Company were retired in the fourth quarter of 2012, with an offsetting reduction in common stock for the par value and the remaining amount offset in additional paid-in-capital. In addition, our Board of Directors authorized all future share repurchases to be retired immediately upon repurchase. We account for treasury stock under the cost method. Upon retirement the excess over par value is charged against additional paid-in capital. The remaining treasury stock activity relates primarily to stock-based compensation awards and the related shares withheld to settle employee tax obligations.
 
Pension and Other Postretirement Benefits Costs—We have pension plans covering the majority of our employees, including certain employees in foreign countries. We calculate our pension costs as required under GAAP, and the calculations and assumptions utilized require judgment. GAAP outlines the methodology used to determine pension expense or income for financial reporting purposes. For purposes of determining pension expense under GAAP, a calculated “market-related value” of our plan assets is used to develop the amount of deferred asset gains or losses to be amortized. The market-related value of assets is determined using actual asset gains or losses over a three year period. Under GAAP, a “corridor” approach may be elected and applied in the recognition of asset and liability gains or losses which limits expense recognition to the net outstanding gains and losses in excess of the greater of 10 percent of the projected benefit obligation or the calculated "market-related value" of assets. We do not use a “corridor” approach in the calculation of FAS expense.
 
We recognize the funded status of a postretirement benefit plan (defined benefit pension and other benefits) as an asset or liability in our consolidated balance sheets. Funded status represents the difference between the projected benefit obligation of the plan and the market value of the plan’s assets. Previously unrecognized deferred amounts such as demographic or asset gains or losses and the impact of historical plan changes are included in AOCL. Changes in these amounts in future years will be reflected through AOCL and amortized in future pension expense over the estimated average remaining employee service period.
 
Derivative Financial Instruments—We enter into foreign currency forward contracts with commercial banks to fix the foreign currency exchange rates on specific commitments, payments, and receipts. Our foreign currency forward contracts are transaction driven and relate directly to a particular asset, liability or transaction for which commitments are in place. For foreign currency forward contracts designated and qualified for cash flow hedge accounting, we record the effective portion of the gain or loss on the derivative in AOCL, net of tax, and reclassify it into earnings in the same period or periods during which the hedged revenue or cost of sales transaction affects earnings.
 
We recognize all derivative financial instruments as either assets or liabilities at fair value in our consolidated balance sheets. We measure and record the impact of counterparty credit risk into our valuation and the impact was not material for the years ended December 31, 2013 and 2012. We designate most foreign currency forward contracts as cash flow hedges of forecasted purchases and sales denominated in foreign currencies, and interest rate swaps as fair value hedges of our fixed-rate financing obligations. We classify the cash flows from these instruments in the same category as the cash flows from the hedged items. We do not hold or issue derivative financial instruments for trading or speculative purposes.
 
Realized gains and losses resulting from these cash flow hedges offset the foreign exchange gains and losses on the underlying transactions being hedged. Gains and losses on derivatives not designated for hedge accounting or representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized currently in net sales or cost of sales.

We also periodically enter into pay-variable, receive-fixed interest rate swaps to manage interest rate risk associated with our fixed-rate financing obligations. We account for our interest rate swaps as fair value hedges of a portion of our fixed-rate financing obligations, and accordingly record gains and losses from changes in the fair value of these swaps in interest expense, along with the offsetting gains and losses on the fair value adjustment of the hedged portion of our fixed-rate financing obligations. We also record in interest expense the net amount paid or received under the swap for the period and the amortization of gain or loss from the early termination of interest rate swaps. There were no interest rate swaps outstanding for the years ended December 31, 2013 and 2012. For a discussion of the impacts of our hedging activities on our results, see "Note 8: Derivative Financial Instruments".
 
Fair Values—The accounting standard for fair value measurements provides a framework for measuring fair value and requires expanded disclosures regarding fair value measurements. Fair value is defined as the price that would be received for an asset or the exit price that would be paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. This accounting standard established a fair value hierarchy, which requires an entity to maximize the use of observable inputs, where available. The following summarizes the three levels of inputs required:

Level 1:
Quoted prices in active markets for identical assets or liabilities.

Level 2:
Observable inputs, other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or that we corroborate with observable market data for substantially the full term of the related assets or liabilities.

Level 3:
Unobservable inputs supported by little or no market activity that are significant to the fair value of the assets or liabilities.

Assets and liabilities measured at fair value on a recurring basis consisted of marketable securities held in trust, short-term investments and foreign currency forward contracts as of December 31, 2013 and 2012. Fair value information for those assets and liabilities, including their classification in the fair value hierarchy, is included in "Note 13: Pension and Other Employee Benefits" (for marketable securities held in trust), "Note 1: Summary of Significant Accounting Policies" (for short-term investments), and "Note 8: Derivative Financial Instruments" (for foreign currency forward contracts). We did not have any significant nonfinancial assets or nonfinancial liabilities that would be recognized or disclosed at fair value on a recurring basis as of December 31, 2013 and 2012. We did not have any material amounts of Level 3 assets or liabilities at December 31, 2013 and 2012.

Earnings per Share (EPS)—We compute basic EPS attributable to Raytheon Company common stockholders by dividing income from continuing operations attributable to Raytheon Company common stockholders, income (loss) from discontinued operations attributable to Raytheon Company common stockholders, and net income attributable to Raytheon Company, by our weighted-average common shares outstanding, including participating securities outstanding, as described below, during the period. Diluted EPS reflects the potential dilution beyond shares for basic EPS that could occur if securities or other contracts to issue common stock were exercised, converted into common stock, or resulted in the issuance of common stock that would have shared in our earnings. We compute basic and diluted EPS using actual income from continuing operations attributable to Raytheon Company common stockholders, income (loss) from discontinued operations attributable to Raytheon Company common stockholders, net income attributable to Raytheon Company, and our actual weighted-average shares and participating securities outstanding rather than the numbers presented within our consolidated financial statements, which are rounded to the nearest million. As a result, it may not be possible to recalculate EPS as presented in our consolidated financial statements. Furthermore, it may not be possible to recalculate EPS attributable to Raytheon Company common stockholders by adjusting EPS from continuing operations by EPS from discontinued operations.
 
We include all unvested stock awards that contain non-forfeitable rights to dividends or dividend equivalents, whether paid or unpaid, in the number of shares outstanding in our basic and diluted EPS calculations. As a result, we have included all of our outstanding unvested restricted stock and Long-Term Performance Plan (LTPP) awards that meet the retirement eligible criteria in our calculation of basic and diluted EPS. We disclose EPS for common stock and unvested share-based payment awards, and separately disclose distributed and undistributed earnings. Distributed earnings represent common stock dividends and dividends earned on unvested share-based payment awards of retirement eligible employees. Undistributed earnings represent earnings that were available for distribution but were not distributed. Common stock and unvested share-based payment awards earn dividends equally.
 
Employee Stock Plans—Stock-based compensation cost is measured at the grant date based on the calculated fair value of the award. The expense is recognized over the employees’ requisite service period, generally the vesting period of the award. The expense is amortized over the service period using the graded vesting method for our restricted stock and restricted stock units and the straight-line amortization method for our LTPP. The related gross excess tax benefit received upon exercise of stock options or vesting of a stock-based award, if any, is reflected in the consolidated statements of cash flows as a financing activity rather than an operating activity.
 
Risks and Uncertainties—We provide a wide range of technologically advanced products, services and solutions for principally governmental customers in the U.S. and abroad, and are subject to certain business risks specific to that industry. Total sales to the U.S. Government, excluding foreign military sales, were 72%, 73%, and 74% of total net sales in 2013, 2012 and 2011, respectively. Total sales to customers outside the U.S., including foreign military sales through the U.S. Government, were 27%, 26% and 25% of total net sales in 2013, 2012 and 2011, respectively. Sales to the U.S. Government may be affected by changes in procurement policies, budget considerations, changing concepts of national defense, political developments abroad and other factors. Sales to international customers may be affected by changes in the priorities and budgets of international customers, which may be driven by changes in threat environments, geo-political uncertainties, potentially volatile worldwide economic conditions, various regional and local economic and political factors, risks and uncertainties and U.S. foreign policy.

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