Raytheon 10-K 10 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Feb. 08, 2016	Jun. 26, 2015
Entity Information [Line Items]
Entity Registrant Name	RAYTHEON CO/
Entity Central Index Key	1,047,122
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Trading Symbol	RTN
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		298,998,000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Aggregate market value of the voting stock held by non-affiliates			$ 29.6

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 2,328,000,000	$ 3,222,000,000
Short-term investments	872,000,000	1,497,000,000
Contracts in process, net	5,564,000,000	4,985,000,000
Inventories	635,000,000	414,000,000
Prepaid expenses and other current assets	413,000,000	161,000,000
Total current assets	9,812,000,000	10,279,000,000
Property, plant and equipment, net	2,005,000,000	1,935,000,000
Goodwill	14,731,000,000	13,061,000,000
Other assets, net	2,733,000,000	2,441,000,000
Total assets	29,281,000,000	27,716,000,000
Current liabilities
Advance payments and billings in excess of costs incurred	2,193,000,000	2,284,000,000
Accounts payable	1,402,000,000	1,250,000,000
Accrued employee compensation	1,154,000,000	1,059,000,000
Other current liabilities	1,377,000,000	1,159,000,000
Total current liabilities	6,126,000,000	5,752,000,000
Accrued retiree benefits and other long-term liabilities	7,140,000,000	6,918,000,000
Long-term debt	$ 5,330,000,000	$ 5,325,000,000
Commitments and contingencies (Note 11)
Redeemable noncontrolling interest (Note 5)	$ 355,000,000	$ 0
Raytheon Company stockholders’ equity
Common stock, par value, $0.01 per share, 1,450 shares authorized, 299 and 307 shares outstanding at December 31, 2015 and 2014, respectively.	3,000,000	3,000,000
Additional paid-in capital	398,000,000	1,309,000,000
Accumulated other comprehensive loss	(7,176,000,000)	(7,458,000,000)
Retained earnings	16,903,000,000	15,671,000,000
Total Raytheon Company stockholders’ equity	10,128,000,000	9,525,000,000
Noncontrolling interests in subsidiaries	202,000,000	196,000,000
Total equity	10,330,000,000	9,721,000,000
Total liabilities, redeemable noncontrolling interest and equity	$ 29,281,000,000	$ 27,716,000,000

CONSOLIDATED BALANCE SHEETS Con

CONSOLIDATED BALANCE SHEETS Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Dec. 31, 2015	Dec. 31, 2014
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,450	1,450
Common Stock, Shares, Outstanding	299	307.3

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net sales
Products	$ 19,443	$ 19,126	$ 19,855
Services	3,804	3,700	3,851
Total net sales	23,247	22,826	23,706
Operating expenses
Cost of sales—products	14,447	14,260	15,292
Cost of sales—services	3,127	3,035	3,240
General and administrative expenses	2,660	2,352	2,236
Total operating expenses	20,234	19,647	20,768
Operating income	3,013	3,179	2,938
Non-operating (income) expense, net
Interest expense	233	213	210
Interest income	(11)	(10)	(12)
Other (income) expense, net	4	(7)	(17)
Total non-operating (income) expense, net	226	196	181
Income from continuing operations before taxes	2,787	2,983	2,757
Federal and foreign income taxes	733	790	808
Income from continuing operations	2,054	2,193	1,949
Income (loss) from discontinued operations, net of tax	13	65	64
Net income	2,067	2,258	2,013
Less: Net income (loss) attributable to noncontrolling interests in subsidiaries	(7)	14	17
Net income attributable to Raytheon Company	$ 2,074	$ 2,244	$ 1,996
Basic earnings per share attributable to Raytheon Company common stockholders:
Income from continuing operations	$ 6.76	$ 6.98	$ 5.97
Income (loss) from discontinued operations, net of tax	0.04	0.21	0.20
Net income	6.81	7.19	6.17
Diluted earnings per share attributable to Raytheon Company common stockholders:
Income from continuing operations	6.75	6.97	5.96
Income (loss) from discontinued operations, net of tax	0.04	0.21	0.20
Net income	$ 6.80	$ 7.18	$ 6.16
Amounts attributable to Raytheon Company common stockholders:
Income from continuing operations	$ 2,061	$ 2,179	$ 1,932
Income (loss) from discontinued operations, net of tax	13	65	64
Net income	$ 2,074	$ 2,244	$ 1,996

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 2,067	$ 2,258	$ 2,013
Pension and other employee benefit plans, net:
Prior service (cost) credit arising during period	(2)	(11)	0
Amortization of prior service cost (credit) included in net periodic cost	6	6	7
Net gain (loss) arising during period	(622)	(4,410)	2,965
Amortization of net actuarial loss included in net income	1,129	892	1,154
Loss due to curtailments/settlements	4	0	0
Effect of exchange rates	10	9	2
Pension and postretirement benefit plans, net	525	(3,514)	4,128
Foreign exchange translation	(57)	(50)	(13)
Cash flow hedges and interest rate locks	(4)	(10)	(4)
Unrealized gains (losses) on investments and other, net	(5)	1	1
Other comprehensive income (loss), before tax	459	(3,573)	4,112
Income tax benefit (expense) related to items of other comprehensive income (loss)	(177)	1,228	(1,437)
Other comprehensive income (loss), net of tax	282	(2,345)	2,675
Total comprehensive income (loss)	2,349	(87)	4,688
Less: Comprehensive income (loss) attributable to noncontrolling interests in subsidiaries	(7)	14	17
Comprehensive income (loss) attributable to Raytheon Company	$ 2,356	$ (101)	$ 4,671

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Common stock [Member]	Additional paid-In capital [Member]	Accumulated other comprehensive income (loss) [Member]	Retained earnings [Member]	Total Raytheon Company stockholders' equity [Member]	Noncontrolling interest in subsidiaries(1) [Member]	[1]
Beginning Balance at Dec. 31, 2012	$ 8,190	$ 3	$ 2,928	$ (7,788)	$ 12,883	$ 8,026	$ 164
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Raytheon Company	1,996				1,996	1,996
Net income excluding redeemable noncontrolling interest	2,013						17
Other comprehensive income (loss), net of tax	2,675			2,675		2,675
Dividends declared	(706)				(706)	(706)
Distributions and other activity related to noncontrolling interests	(19)					0	(19)
Common stock plans activity	167		167			167
Share repurchases	(1,123)		(1,123)			(1,123)
Ending Balance at Dec. 31, 2013	11,197	3	1,972	(5,113)	14,173	11,035	162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Raytheon Company	2,244				2,244	2,244
Net income excluding redeemable noncontrolling interest	2,258						14
Other comprehensive income (loss), net of tax	(2,345)			(2,345)		(2,345)
Dividends declared	(746)				(746)	(746)
Distributions and other activity related to noncontrolling interests	(2)		(22)			(22)	20
Common stock plans activity	199		199			199
Share repurchases	(840)		(840)			(840)
Ending Balance at Dec. 31, 2014	9,721	3	1,309	(7,458)	15,671	9,525	196
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Raytheon Company	2,074				2,074	2,074
Net income excluding redeemable noncontrolling interest	2,084						10
Other comprehensive income (loss), net of tax	282			282		282
Adjustment of redeemable noncontrolling interest to redemption value	(29)				(29)	(29)
Dividends declared	(813)				(813)	(813)
Distributions and other activity related to noncontrolling interests	(6)		(2)			(2)	(4)
Common stock plans activity	190		190			190
Share repurchases	(1,099)		(1,099)			(1,099)
Ending Balance at Dec. 31, 2015	$ 10,330	$ 3	$ 398	$ (7,176)	$ 16,903	$ 10,128	$ 202
[1]	(1) Excludes redeemable noncontrolling interest which is not considered equity. See "Note 5: Forcepoint Joint Venture" for additional information.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income	$ 2,067,000,000	$ 2,258,000,000	$ 2,013,000,000
(Income) loss from discontinued operations, net of tax	(13,000,000)	(65,000,000)	(64,000,000)
Income from continuing operations	2,054,000,000	2,193,000,000	1,949,000,000
Adjustments to reconcile to net cash provided by (used in) operating activities from continuing operations, net of the effect of acquisitions and divestitures
Depreciation and amortization	489,000,000	439,000,000	445,000,000
Stock-based compensation	140,000,000	148,000,000	129,000,000
Deferred income taxes	(56,000,000)	(60,000,000)	68,000,000
Tax benefit from stock-based awards	(47,000,000)	(47,000,000)	(16,000,000)
Changes in assets and liabilities
Contracts in process, net and advance payments and billings in excess of costs incurred	(637,000,000)	(162,000,000)	(391,000,000)
Inventories	(223,000,000)	(50,000,000)	18,000,000
Prepaid expenses and other current assets	(28,000,000)	50,000,000	(27,000,000)
Income taxes receivable/payable	(181,000,000)	(33,000,000)	197,000,000
Accounts payable	107,000,000	54,000,000	(171,000,000)
Accrued employee compensation	72,000,000	(20,000,000)	53,000,000
Other current liabilities	58,000,000	(33,000,000)	48,000,000
Accrued retiree benefits	637,000,000	(367,000,000)	150,000,000
Other, net	(39,000,000)	(48,000,000)	(70,000,000)
Net cash provided by (used in) operating activities from continuing operations	2,346,000,000	2,064,000,000	2,382,000,000
Net cash provided by (used in) operating activities from discontinued operations	13,000,000	120,000,000	(4,000,000)
Net cash provided by (used in) operating activities	2,359,000,000	2,184,000,000	2,378,000,000
Cash flows from investing activities
Additions to property, plant and equipment	(406,000,000)	(326,000,000)	(280,000,000)
Proceeds from sales of property, plant and equipment	59,000,000	9,000,000	2,000,000
Additions to capitalized internal use software	(51,000,000)	(54,000,000)	(49,000,000)
Purchases of short-term investments	(1,392,000,000)	(2,914,000,000)	(1,241,000,000)
Sales of short-term investments	209,000,000	882,000,000	325,000,000
Maturities of short-term investments	1,793,000,000	1,523,000,000	779,000,000
Payments for acquired companies, net of cash received	(1,954,000,000)	(427,000,000)	(9,000,000)
Other	(2,000,000)	(15,000,000)	0
Net cash provided by (used in) investing activities	(1,744,000,000)	(1,322,000,000)	(473,000,000)
Cash flows from financing activities
Dividends paid	(797,000,000)	(735,000,000)	(694,000,000)
Issuance of long-term debt, net of offering costs	0	592,000,000	0
Proceeds from exercise of stock options	0	2,000,000	24,000,000
Tax benefit from stock-based awards	47,000,000	47,000,000	16,000,000
Sale of noncontrolling interest in Forcepoint	343,000,000	0	0
Other	(3,000,000)	(2,000,000)	(20,000,000)
Net cash provided by (used in) financing activities	(1,509,000,000)	(936,000,000)	(1,797,000,000)
Net increase (decrease) in cash and cash equivalents	(894,000,000)	(74,000,000)	108,000,000
Cash and cash equivalents at beginning of year	3,222,000,000	3,296,000,000	3,188,000,000
Cash and cash equivalents at end of year	2,328,000,000	3,222,000,000	3,296,000,000
Satisfy tax withholding [Member]
Cash flows from financing activities
Repurchases of common stock under share repurchase programs	(99,000,000)	(90,000,000)	(48,000,000)
Share Repurchase Program [Member]
Cash flows from financing activities
Repurchases of common stock under share repurchase programs	$ (1,000,000,000)	$ (750,000,000)	$ (1,075,000,000)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	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. 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 Recognition — We 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 toward 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 U.S. GAAP. We combine closely related contracts when all the applicable criteria under U.S. 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 U.S. 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 a method to measure progress toward 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 toward completion of the contract. Under the cost-to-cost measure of progress, the extent of progress toward 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 companywide 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 toward 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 in 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 in 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) 2015 2014 2013 Operating income $ 371 $ 513 $ 557 Income from continuing operations attributable to Raytheon Company 241 333 362 Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company $ 0.79 $ 1.07 $ 1.12 We apply the separation guidance under U.S. 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. We recognize revenue for each deliverable based on the revenue recognition policies described herein. 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. We also sell software via subscriptions and hosted solutions and revenue for these arrangements is recognized straight-line over the term of the agreement. A portion of our revenues are generated from the sale of appliances that contain software components, such as operating systems, that operate together with the hardware platform to provide the essential functionality of the appliance. When sold in a multiple element arrangement, these appliances are considered non-software deliverables and therefore, we can allocate the arrangement fee based upon relative selling price of each element. When applying the relative selling price method, we determine the selling price of each element using best estimate of selling price (BESP), because VSOE and third-party evidence (TPE) are not available. The revenues allocated to the software-related elements are recognized based on software industry specific revenue recognition guidance, as noted above. The revenues allocated to the non-software related elements are recognized based on the nature of the element provided. We estimate BESP by considering internal factors such as historical pricing practices and gross margin objectives, as well as market conditions such as competitor pricing strategies, customer demands and geography, and regularly review these assumptions. To a much lesser extent, we enter into other types of contracts such as service, commercial, 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. 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. 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 $706 million , $500 million and $465 million in 2015 , 2014 and 2013 , 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. With the exception of Forcepoint, 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. Payments made for state income taxes related to Forcepoint are included in federal and foreign income tax expense. Other Expense (Income), Net —Other expense (income), net, consists primarily of gains and losses from our investments held in 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. These marketable securities are classified as available-for-sale and are recorded at fair value as short-term investments in our consolidated balance sheets. These investments are deemed Level 2 assets under the fair value hierarchy at December 31, 2015 and December 31, 2014 , 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. At December 31, 2015 and December 31, 2014 , we had short-term investments of $872 million and $1,497 million , respectively, 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 and P-1 . As of December 31, 2015 , our short-term investments had an average maturity of approximately five months. The amortized cost of these securities closely approximated their fair value at December 31, 2015 and December 31, 2014 . There were no securities deemed to have other than temporary declines in value for 2015 . In 2015 , we recorded unrealized gains on short-term investments of less than $1 million , net of tax, in accumulated other comprehensive loss (AOCL). In 2014 , we recorded unrealized losses on short-term investments of less than $1 million , net of tax, in AOCL. In 2015 , we recorded sales of short-term investments of $209 million , which resulted in gains of less than $1 million recorded in other (income) expense, net. In 2014 , we recorded sales of short-term investments of $882 million , which resulted in gains of less than $1 million recorded in other (income) expense, net. For purposes of computing realized gains and losses on available-for-sale securities, we determine cost on a specific identification basis. 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 U.S. 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, 2015 and December 31, 2014 , net deferred contract costs were approximately $241 million and $223 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 (PRB) 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 PRB costs differ from the Financial Accounting Standards (FAS) requirements under U.S. 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 PRB plans in 2013 – 2015 . This resulted in $185 million of income , $286 million of income and $249 million of expense in 2015 , 2014 and 2013 , respectively, reflected in our consolidated results of operations for the difference between CAS and FAS requirements for our pension and PRB plans in those years. Inventories —Inventories are stated at the lower of its cost (first-in, first-out or average cost) or 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) 2015 2014 Materials and purchased parts $ 69 $ 70 Work in process 551 326 Finished goods 15 18 Total $ 635 $ 414 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 $225 million and $126 million in inventories as work in process at December 31, 2015 and December 31, 2014 . 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 operating 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 U.S. GAAP. In performing our annual impairment test in the fourth quarters of 2015 , 2014 and 2013 we did not identify any goodwill 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 enterprisewide 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 . Computer software development costs related to software products developed for external use are capitalized, when significant, after establishment of technological feasibility and marketability. There have been no such costs capitalized to date as the costs incurred during the period between technological feasibility to general release have not been significant. 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. Deferred Revenue —We receive up-front payments related to software license sales for Forcepoint, which we recognize ratably over the license term. We classify deferred revenue as current and noncurrent based on the timing of when we expect to recognize revenue. The current and noncurrent portions of Forcepoint's deferred revenue are included in other accrued expenses and accrued retiree benefits and other long-term liabilities, respectively, in our consolidated balance sheets. Redeemable Noncontrolling Interest —Redeemable noncontrolling interest is recognized at the greater of the estimated redemption value as of the balance sheet date or the initial value adjusted for the noncontrolling interest holder's share of the cumulative impact of net income (loss) and other changes in accumulated other comprehensive income (loss). Adjustments to the redemption value over the period from the date of acquisition to the date the redemption feature becomes puttable are immediately recorded to retained earnings. We reflect the redemption value adjustments in the EPS calculation if redemption value is in excess of the fair value of noncontrolling interest. Other Comprehensive Income (Loss) —Other comprehensive income (loss) includes foreign exchange translation adjustments, effective portion of gains and losses on derivative instruments qualified as cash flow hedges, unrealized gains (losses) on available-for-sale investments, and gains and losses associated with pension and PRB. 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, 2015 , 2014 and 2013 : Foreign exchange translation Cash flow hedges and interest rate locks Unrealized gains (losses) on investments and other, net Pension and postretirement benefit plans, net Total (In millions) 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 ) Before tax amount (50 ) (10 ) 1 (3,514 ) (3,573 ) Tax (expense) benefit — 4 (1 ) 1,225 1,228 Net of tax amount (50 ) (6 ) — (2,289 ) (2,345 ) Balance at December 31, 2014 (3 ) (14 ) (9 ) (7,432 ) (7,458 ) Before tax amount (57 ) (4 ) (5 ) 525 459 Tax (expense) benefit — 2 2 (181 ) (177 ) Net of tax amount (57 ) (2 ) (3 ) 344 282 Balance at December 31, 2015 $ (60 ) $ (16 ) $ (12 ) $ (7,088 ) $ (7,176 ) Material amounts reclassified out of AOCL were related to amortization of net actuarial loss associated with our pension and PRB plans and were $1,129 million , $892 million and $1,154 million before tax in 2015 , 2014 and 2013 , respectively. This component of AOCL is included in the calculation of net periodic pension expense (income) (see "Note 14: Pension and Other Employee Benefits" for additional details). The defined benefit pension and other employee benefit plans are shown net of tax benefits of $3,824 million and $4,005 million at December 31, 2015 and December 31, 2014 , respectively. The cash flow hedges and interest rate locks are shown net of tax benefits of $10 million and $8 million at December 31, 2015 and December 31, 2014 , respectively. The unrealized gains (losses) on investments and other are shown net of tax benefits of $4 million and $2 million at December 31, 2015 and December 31, 2014 , respectively. We expect approximately $5 million of after-tax net unrealized losses on our cash flow hedges at December 31, 2015 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 2015 , 2014 and 2013 were not material. Treasury Stock —Repurchased shares are 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. Pension and Other Postretirement Benefits (PRB) 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 U.S. GAAP, and the calculations and assumptions utilized require judgment. U.S. GAAP outlines the methodology used to determine pension expense or income for financial reporting purposes. For purposes of determining pension expense under U.S. 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 U.S. 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% 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. We execute these instruments with financial institutions that we judge to be credit-worthy, and the majority of our foreign currency forward contracts are denominated in currencies of major industrial countries. We do not hold or issue derivative financial instruments for trading or speculative purposes. 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 classify the cash flows from these instruments in the same category as the cash flows from the hedged items. The aggregate notional amount of the outstanding foreign currency forward contracts was $1,076 million and $926 million at December 31, 2015 and December 31, 2014 , respectively. The net notional exposure of these contracts was approximately $117 million and $57 million at December 31, 2015 and December 31, 2014 , respectively. The foreign currency forward contracts at December 31, 2015 have maturities at various dates through 2028 as follows: $695 million in 2016 ; $263 million in 2017 ; $70 million in 2018 ; and $48 million thereafter. We recognize all derivative financial instruments as either assets or liabilities at fair value in our consolidated balance sheets. The fair value of asset derivatives included in other assets, net and liability derivatives included in other current liabilities in our consolidated balance sheets related to foreign currency contracts were $9 million and $29 million , respectively at December 31, 2015 and $7 million and $24 million , respectively at December 31, 2014. The fair values of these derivatives are Level 2 in the fair value hierarchy for 2015 and 2014 because they are determined based on a market approach utilizing externally quoted forward rates for similar contracts. We measure and record the impact of counterparty credit risk into our valuation and the impact was less than $1 million for the years ended December 31, 2015 and 2014 . 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. 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 may also 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

Earnings Per Share (EPS)

Earnings Per Share (EPS)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share (EPS)	Earnings Per Share (EPS) EPS from continuing operations attributable to Raytheon Company common stockholders and unvested stock-based payment awards was as follows: 2015 2014 2013 Basic EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 2.67 $ 2.39 $ 2.19 Undistributed earnings 4.09 4.59 3.78 Total $ 6.76 $ 6.98 $ 5.97 Diluted EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 2.67 $ 2.39 $ 2.18 Undistributed earnings 4.08 4.58 3.78 Total $ 6.75 $ 6.97 $ 5.96 Basic and diluted EPS from discontinued operations attributable to Raytheon Company common stockholders and unvested stock-based payment awards were earnings of $0.04 , $0.21 and $0.20 for 2015 , 2014 and 2013 , respectively. Income attributable to participating securities was as follows: (In millions) 2015 2014 2013 Income from continuing operations attributable to participating securities $ 32 $ 39 $ 38 Income (loss) from discontinued operations, net of tax attributable to participating securities (1) — 1 1 Net income attributable to participating securities $ 32 $ 40 $ 39 (1) Income (loss) from discontinued operations, net of tax attributable to participating securities, was earnings of less than $1 million for 2015 . The weighted-average shares outstanding for basic and diluted EPS were as follows: (In millions) 2015 2014 2013 Shares for basic EPS (1) 304.8 312.0 323.4 Dilutive effect of stock options and LTPP (2) 0.4 0.6 0.8 Shares for diluted EPS 305.2 312.6 324.2 (1) Includes participating securities of 4.7 million , 5.5 million and 6.4 million for 2015 , 2014 and 2013 , respectively. (2) Includes stock options outstanding of less than 1 million in 2014 and 2013 . There were no stock options outstanding at December 31, 2015 . Our Board of Directors is authorized to issue up to 200 million shares of preferred stock, $0.01 par value per share, in multiple series with terms as determined by them. There were no shares of preferred stock outstanding at December 31, 2015 and December 31, 2014 .

eBorders Settlement

eBorders Settlement	12 Months Ended
	Dec. 31, 2015
eBorders Settlement [Abstract]
Legal Matters and Contingencies [Text Block]	eBorders Settlement In March 2015, Raytheon Systems Limited (RSL) reached a settlement with the UK Home Office concluding the parties' dispute regarding the UK Home Office's July 2010 termination of RSL's eBorders contract within our Intelligence, Information and Services (IIS) segment. The settlement included a cash payment from the UK Home Office to RSL of £150 million (approximately $226 million based on foreign exchange rates as of the settlement date) for the resolution of all claims and counterclaims of both parties related to the matter. After certain expenses and derecognition of the outstanding receivables, IIS recorded $181 million in operating income through a reduction in cost of sales in 2015.

Acquisitions and Goodwill

Acquisitions and Goodwill	12 Months Ended
	Dec. 31, 2015
Business Combination, Description [Abstract]
Acquisitions	Acquisitions and Goodwill In pursuing our business strategies, we acquire and make investments in certain businesses that meet strategic and financial criteria. In October 2015, we acquired Foreground Security, subsequently renamed Raytheon Foreground Security (RFS), for $62 million in cash, net of cash received, and exclusive of retention payments. RFS will be integrated into our IIS business, within the Cybersecurity and Special Missions (CSM) product area. RFS provides security operations centers (SOCs), managed security service solutions and cybersecurity professional services. RFS will accelerate Raytheon's expansion into managed security services across federal, international and commercial markets. In connection with this transaction we have preliminarily recorded $50 million of goodwill related to expected synergies from combining operations and the value of the existing workforce, and $7 million of intangible assets, primarily related to customer relationships and technology with a weighted-average life of seven years. We expect to complete the purchase price allocation process in 2016 after our final reviews are completed. In May 2015, we acquired Websense, Inc. (Websense) from Vista Equity Partners for approximately $1.9 billion , net of cash received, and exclusive of retention payments. Websense is a leader in advanced threat protection and data theft prevention across web, email, cloud and endpoint infrastructure. Following the acquisition, we completed a series of transactions to create our Forcepoint joint venture (with Vista Equity Partners). For more information on the Forcepoint joint venture, see Item 1 "Business," and "Note 5: Forcepoint Joint Venture" within Item 8 of this Form 10-K. In connection with this acquisition, we incurred transaction and integration-related costs of $33 million in 2015 of which $26 million were recorded at Corporate. We recorded $1.6 billion of goodwill, all of which was allocated to the Forcepoint segment, primarily related to expected synergies from combining operations and the value of the existing workforce, and none of which is expected to be deductible for tax purposes. The final purchase price allocation, net of cash received, for the Websense acquisition was as follows: (In millions) Purchase Price Allocation Accounts receivable (at contractually stated amounts) $ 38 Other current assets 21 Property, plant and equipment 19 Goodwill 1,624 Intangible assets 501 Other non-current assets 16 Deferred revenue (225 ) Current liabilities (51 ) Long-term liabilities (52 ) Fair value of net assets acquired $ 1,891 The following are the identifiable intangible assets acquired and the respective estimated periods over which such assets will be amortized: (In millions, except years) Gross Carrying Amount Weighted-average Useful Life (in Years) Completed technology $ 439 7 Customer relationships 43 13 Trademarks and other 19 10 Fair value of intangible assets acquired $ 501 In November 2014, we acquired Blackbird Technologies, Incorporated, subsequently renamed Raytheon Blackbird Technologies (RBT), for $427 million in cash, net of cash received, and exclusive of retention payments. RBT is a leading provider of persistent surveillance, secure tactical communications and cybersecurity solutions to the Intelligence Community and special operations market and further expands our IIS offerings. In connection with this acquisition, we have recorded $300 million of goodwill, all of which was allocated to our IIS business segment, primarily related to expected synergies from combining operations and the value of the existing workforce, and $126 million of intangible assets, primarily related to contractual relationships, completed technology and trade names with a weighted-average life of nine years. In June 2013, we acquired Visual Analytics, Incorporated, subsequently renamed Raytheon Visual Analytics Incorporated (RVAI). RVAI further extends our capabilities to meet the data analytics, data visualization and information sharing needs of our customers. In connection with this acquisition, we have recorded $12 million of goodwill, primarily related to expected synergies from combining operations and the value of the existing workforce, and $3 million of intangible assets, primarily related to technology and customer relationships with a weighted-average life of seven years. Pro forma financial information and revenue from the date of acquisition has not been provided for these acquisitions as they are not material either individually or in the aggregate. We funded each of the above acquisitions using cash on hand. The operating results of these businesses have been included in our consolidated results as of the respective closing dates of the acquisitions. The purchase price of these businesses has been allocated to the estimated fair value of net tangible and intangible assets acquired, with any excess purchase price recorded as goodwill. The total amount of goodwill that is expected to be deductible for tax purposes related to these acquisitions was $312 million at December 31, 2015 . A rollforward of goodwill by segment was as follows: (In millions) Integrated Defense Systems Intelligence, Information and Services (1) Missile Systems Space and Airborne Systems Forcepoint (1) Total Balance at December 31, 2013 $ 1,800 $ 2,523 $ 4,150 $ 4,106 $ 185 $ 12,764 Acquisitions — 301 — — — 301 Effect of foreign exchange rates and other (3 ) (1 ) — — — (4 ) Balance at December 31, 2014 1,797 2,823 4,150 4,106 185 13,061 Acquisitions (2) — 48 4 — 1,624 1,676 Effect of foreign exchange rates and other (3 ) (3 ) — — — (6 ) Balance at December 31, 2015 $ 1,794 $ 2,868 $ 4,154 $ 4,106 $ 1,809 $ 14,731 (1) In connection with the reclassification of Raytheon Cyber Products (RCP) from our IIS segment, goodwill of $185 million was allocated to the Forcepoint segment on a relative fair value basis. (2) In addition to the acquisitions of Websense and Foreground Security, we acquired Sensintel, Inc. at Missile Systems (MS) and finalized the purchase price allocation for RBT at IIS in 2015 . For information on our intangible assets, see "Note 9: Other Assets, Net".

Forcepoint Joint Venture

Forcepoint Joint Venture	12 Months Ended
	Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Forcepoint Joint Venture	Forcepoint Joint Venture In May 2015, we created Raytheon|Websense, a new cybersecurity joint venture company (with Vista Equity Partners), through a series of transactions by which we acquired Websense, Inc. (Websense) from Vista Equity Partners and combined it with RCP, formerly part of our IIS segment. We then sold 19.7% of the equity interest in the combined company to Vista Equity Partners for $343 million . Raytheon|Websense was later renamed Forcepoint. The joint venture agreement between Raytheon and Vista Equity Partners provides Vista Equity Partners with certain rights to require Forcepoint to pursue an initial public offering at any time after four years and three months following the closing date of May 29, 2015, or pursue a sale of the company at any time after five years following the closing date. In either of these events, Raytheon has the option to purchase all (but not less than all) of Vista Equity Partners’ interest in Forcepoint for cash at a price equal to fair value as determined under the joint venture agreement. Additionally, Vista Equity Partners has the ability to liquidate its ownership through a put option any time after two years following the closing date. In the event of a put option, Vista Equity Partners could require Raytheon to purchase all (but not less than all) of Vista Equity Partners’ interest in Forcepoint for cash at a price equal to fair value as determined under the joint venture agreement. Lastly, at any time after three years following the closing date, Raytheon has the option to purchase all (but not less than all) of Vista Equity Partners’ interest in Forcepoint at a price equal to fair value as determined under the joint venture agreement. Vista Equity Partners' interest in Forcepoint is presented as redeemable noncontrolling interest, outside of stockholders' equity, on the consolidated balance sheet. A rollforward of redeemable noncontrolling interest was as follows: (In millions) 2015 2014 2013 Beginning balance $ — $ — $ — Sale of noncontrolling interest in Forcepoint 343 — — Net income (loss) (17 ) — — Other comprehensive income (loss), net of tax (1) — — — Adjustment of noncontrolling interest to redemption value 29 — — Ending balance $ 355 $ — $ — (1) Other comprehensive income (loss), net of tax, was a loss of less than $1 million in 2015 .

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2015
Discontinued Operations [Abstract]
Discontinued Operations	Discontinued Operations In pursuing our business strategies we have divested certain non-core businesses, investments and assets when appropriate. All residual activity relating to our previously disposed businesses appears in discontinued operations. In the second quarter of 2014, we received notice of the resolution of a dispute and related litigation with the U.S. government regarding pension segment closing adjustments under U.S. government Cost Accounting Standard 413 (CAS 413) for operations we divested over ten years ago. Under CAS 413, a pension plan termination adjustment is required when a contractor divests a business, yet retains ownership of the pension plan assets and liabilities of that business. These adjustments can result in payments to the U.S. government for pension plans that are in surplus position or payments to contractors for plans that are in a deficit position. As a result, in 2014 we received payment of $81 million and recorded a $52 million gain, net of federal tax expense, in discontinued operations, attributable to the affected plans that were in a deficit position at the time of divestiture. In 2010, we recorded a $39 million charge, net of federal tax benefit, in discontinued operations related to the Internal Revenue Service (IRS) assessing Flight Options LLC (Flight Options) for excise taxes. We contested the matter through litigation, and in the fourth quarter of 2013, we reached a settlement and recorded a $33 million gain, net of federal tax expense, in discontinued operations. Additionally in the fourth quarter of 2013, we reached a settlement regarding certain tax audits associated with our divestiture of Raytheon Aircraft Company and recorded a $25 million gain, net of federal tax expense, in discontinued operations.

Contracts in Process, Net

Contracts in Process, Net	12 Months Ended
	Dec. 31, 2015
Contract in Process Net [Abstract]
Contracts in Process, Net	Contracts in Process, Net Contracts in process, net, consisted of the following at December 31: Cost-Type Fixed-Price Total (In millions) 2015 2014 2015 2014 2015 2014 U.S. government contracts (including foreign military sales): Billed $ 432 $ 409 $ 196 $ 226 $ 628 $ 635 Unbilled 867 810 8,381 8,418 9,248 9,228 Progress payments — — (5,752 ) (5,834 ) (5,752 ) (5,834 ) 1,299 1,219 2,825 2,810 4,124 4,029 Other customers: Billed 22 14 524 393 546 407 Unbilled 21 27 1,317 1,127 1,338 1,154 Progress payments — — (439 ) (601 ) (439 ) (601 ) 43 41 1,402 919 1,445 960 Allowance for doubtful accounts — — (5 ) (4 ) (5 ) (4 ) Total contracts in process, net $ 1,342 $ 1,260 $ 4,222 $ 3,725 $ 5,564 $ 4,985 The U.S. government has title to the assets related to unbilled amounts on contracts that provide progress payments. Unbilled amounts are recorded under the percentage-of-completion method and are recoverable from the customer upon shipment of the product, presentation of billings or completion of the contract. Included in unbilled at December 31, 2015 was $250 million which is expected to be collected outside of one year. Billed and unbilled contracts in process include retentions arising from contractual provisions. At December 31, 2015 , retentions were $50 million . We anticipate collecting $9 million of these retentions in 2016 and the balance thereafter.

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net, consisted of the following at December 31: (In millions) 2015 2014 Land $ 86 $ 103 Buildings and improvements 2,530 2,607 Machinery and equipment 3,917 3,716 Property, plant and equipment, gross 6,533 6,426 Accumulated depreciation and amortization (4,528 ) (4,491 ) Total $ 2,005 $ 1,935 Depreciation and amortization expense of property, plant and equipment, net, was $307 million , $301 million and $303 million in 2015 , 2014 and 2013 , respectively.

Other Assets, Net

Other Assets, Net	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Assets Net [Text Block]	Other Assets, Net Other assets, net, consisted of the following at December 31: (In millions) 2015 2014 Marketable securities held in trust (1) $ 525 $ 519 Computer software, net of accumulated amortization of $1,059 and $992 at December 31, 2015 and 2014, respectively 294 313 Other intangible assets, net of accumulated amortization of $402 and $293 at December 31, 2015 and 2014, respectively 700 303 Other noncurrent assets, net 308 241 Deferred tax asset (2) 906 1,065 Total $ 2,733 $ 2,441 (1) For further details, refer to "Note 14: Pension and Other Employee Benefits". (2) For further details, refer to "Note 15: Income Taxes". Computer software amortization expense was $70 million , $79 million and $82 million in 2015 , 2014 and 2013 , respectively. Other intangible assets, net, consisted primarily of completed technology, intellectual property and acquired customer relationships, and increased $509 million , $126 million and $3 million as a result of acquired businesses in 2015 , 2014 and 2013 , respectively. These intangible assets are being amortized over their estimated useful lives which range from 1 to 15 years using either a straight-line or accelerated amortization method based on the pattern of economic benefits we expect to realize from such assets. Amortization expense for other intangible assets was $113 million , $58 million and $60 million in 2015 , 2014 and 2013 , respectively. Computer software and other intangible asset amortization expense is expected to be approximately $199 million in 2016 , $187 million in 2017 , $166 million in 2018 , $137 million in 2019 and $102 million in 2020 . Investments, which are included in other noncurrent assets, net, above consisted of the following at December 31: (In millions, except percentages) Ownership % 2015 2014 Equity method investments Thales-Raytheon Systems Co. Ltd. (TRS) 50 $ 99 $ 98 Range Generation Next (RGNext) 50 11 — Other investments Various 19 11 Total $ 129 $ 109 In 2001, we formed the TRS joint venture with Thales S.A. TRS is a system of systems integrator and provides fully customized solutions through the integration of command and control centers, radars, and communication networks. We record our share of the TRS income or loss and other comprehensive income (loss) as a component of cost of sales and AOCL, respectively. We record losses beyond the carrying amount of the investment only when we guarantee obligations of the investee or commit to provide the investee further financial support. TRS has three operating subsidiaries, one of which, Thales-Raytheon Systems LLC (TRS LLC), we control and consolidate, and the other two, Thales-Raytheon Systems Company S.A.S. (TRS SAS) and Thales-Raytheon Systems Air and Missile Defense Command and Control S.A.S. (TRS AMDC2), previously called Air Command Systems International S.A.S., which we account for using the equity method through our investment in TRS, all of which are reflected in our Integrated Defense Systems (IDS) segment. Of the $99 million investment in TRS, $89 million represents undistributed earnings at December 31, 2015 . Our consolidated statements of operations includes net income, which represents net income attributable to Raytheon Company and net income attributable to noncontrolling interests in subsidiaries. Our primary noncontrolling interest relates to TRS LLC. At December 31, 2015 , TRS LLC had $16 million of receivables due from TRS AMDC2. In addition, we have entered into certain joint ventures formed specifically to facilitate a teaming arrangement between two contractors for the benefit of a customer, generally the U.S. government, whereby we receive a subcontract from the joint venture in the joint venture’s capacity as prime contractor. Accordingly, we record the work we perform for the joint venture as an operating activity. Periodically we enter into other equity method investments that are not related to our core operations. We record the income or loss from these investments as a component of other (income) expense, net. We record losses beyond the carrying amount of the investment only when we guarantee obligations of the investee or commit to provide the investee further financial support.

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt Long-term debt consisted of the following at December 31: (In millions, except percentages) 2015 2014 $251 notes due 2018, 6.75% $ 251 $ 251 $340 notes due 2018, 6.40% 339 339 $500 notes due 2020, 4.40% 498 497 $1,000 notes due 2020, 3.125% 993 992 $1,100 notes due 2022, 2.50% 1,093 1,092 $300 notes due 2024, 3.15% 297 296 $382 notes due 2027, 7.20% 370 369 $185 notes due 2028, 7.00% 184 184 $600 notes due 2040, 4.875% 591 591 $425 notes due 2041, 4.70% 419 419 $300 notes due 2044, 4.20% 295 295 Total debt issued and outstanding (1) $ 5,330 $ 5,325 (1) Total long-term debt amounts at December 31, 2014 are adjusted to reflect the reclassification of debt issuance costs of $5 million in accordance with ASU 2015-03. See "Note 1: Summary of Significant Accounting Policies" for additional information. The notes are redeemable by us at any time at redemption prices based on U.S. Treasury rates. The carrying value of long-term debt was recorded at amortized cost. The fair value of long-term debt was determined using quoted prices in inactive markets, which falls within Level 2 of the fair value hierarchy. The estimated fair value of long-term debt was the following at December 31: (In millions) 2015 2014 Fair value of long-term debt $ 5,826 $ 5,936 In the fourth quarter of 2014, we received proceeds of $592 million for the issuance of $600 million fixed-rate long-term debt. The adjustments to the principal amounts of long-term debt were as follows at December 31: (In millions) 2015 2014 Principal $ 5,383 $ 5,383 Unamortized issue discounts (43 ) (48 ) Unamortized interest rate lock costs (10 ) (10 ) Total $ 5,330 $ 5,325 The aggregate amounts of principal payments due on long-term debt for the next five years are: (In millions) 2016 $ — 2017 — 2018 591 2019 — 2020 1,500 Thereafter 3,292 In November 2015, we entered into a $1.25 billion revolving credit facility maturing in November 2020 and terminated the previous $1.4 billion credit facility entered into in December 2011. Under the $1.25 billion credit facility, we can borrow, issue letters of credit and backstop commercial paper. Borrowings under this facility bear interest at various rate options, including LIBOR plus a margin based on our credit ratings. Based on our credit ratings at December 31, 2015 , borrowings would generally bear interest at LIBOR plus 80.5 basis points. The credit facility is composed of commitments from 20 separate highly rated lenders, each committing no more than 10% of the facility. As of December 31, 2015 and December 31, 2014 there were no borrowings outstanding under these credit facilities. We had no outstanding letters of credit at December 31, 2015 and $2 million of outstanding letters of credit at December 31, 2014 , which effectively reduced our borrowing capacity under the credit facility by that amount. Under the $1.4 billion and $1.25 billion credit facilities we must comply with certain covenants, including a ratio of total debt to total capitalization of no more than 60% . We were in compliance with the credit facility covenants during 2015 and 2014. Our ratio of total debt to total capitalization, as those terms are defined in the credit facility, was 34.5% at December 31, 2015 . We are providing this ratio as this metric is used by our lenders to monitor our leverage and is also a threshold that limits our ability to utilize this facility. Total cash paid for interest on long-term debt was $232 million , $209 million and $210 million in 2015 , 2014 and 2013 , respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Leases —At December 31, 2015 , we had commitments under long-term leases requiring annual rentals on a net lease basis as follows: (In millions) 2016 $ 220 2017 190 2018 162 2019 124 2020 102 Thereafter 352 Rent expense was $236 million , $225 million and $248 million in 2015 , 2014 and 2013 , respectively. In the normal course of business, we lease equipment, office buildings and other facilities under leases that include standard escalation clauses for adjusting rent payments to reflect changes in price indices, as well as renewal options. At December 31, 2015 , we had commitments under agreements to outsource a portion of our information technology function, which have minimum annual payments of approximately $15 million . Environmental Matters — We are involved in various stages of investigation and cleanup related to remediation of various environmental sites. Our estimate of the liability of total environmental remediation costs includes the use of a discount rate and takes into account that a portion of these costs is eligible for future recovery through the pricing of our products and services to the U.S. government. We consider such recovery probable based on government contracting regulations and our long history of receiving reimbursement for such costs, and accordingly have recorded the estimated future recovery of these costs from the U.S. government within contracts in process, net, in our consolidated balance sheets. Our estimates regarding remediation costs to be incurred were as follows at December 31: (In millions, except percentages) 2015 2014 Total remediation costs—undiscounted $ 224 $ 202 Weighted-average discount rate 5.2 % 5.5 % Total remediation costs—discounted $ 149 $ 131 Recoverable portion 94 80 We also lease certain government-owned properties and generally are not liable for remediation of preexisting environmental contamination at these sites. As a result, we generally do not provide for these costs in our consolidated financial statements. Due to the complexity of environmental laws and regulations, the varying costs and effectiveness of alternative cleanup methods and technologies, the uncertainty of insurance coverage and the unresolved extent of our responsibility, it is difficult to determine the ultimate outcome of environmental matters. However, we do not expect any additional liability to have a material adverse effect on our financial position, results of operations or liquidity. Environmental remediation costs expected to be incurred are: (In millions) 2016 $ 32 2017 24 2018 20 2019 16 2020 11 Thereafter 121 Financing Arrangements and Other — We issue guarantees, and banks and surety companies issue, on our behalf, letters of credit and surety bonds to meet various bid, performance, warranty, retention and advance payment obligations of us or our affiliates. These instruments expire on various dates through 2024. Additional guarantees of project performance for which there is no stated value also remain outstanding. The stated values outstanding consisted of the following at December 31: (In millions) 2015 2014 Guarantees $ 213 $ 266 Letters of credit 2,242 1,938 Surety bonds 264 298 Included in guarantees and letters of credit described above were $203 million and $187 million , respectively, at December 31, 2015 , and $196 million and $244 million , respectively, at December 31, 2014 , related to our joint venture in TRS. We provide these guarantees and letters of credit to TRS and other affiliates to assist these entities in obtaining financing on more favorable terms, making bids on contracts and performing their contractual obligations. While we expect these entities to satisfy their loans and meet their project performance and other contractual obligations, their failure to do so may result in a future obligation to us. We periodically evaluate the risk of TRS and other affiliates failing to meet their obligations described above. At December 31, 2015 , we believe the risk that TRS and other affiliates will not be able to meet their obligations is minimal for the foreseeable future based on their current financial condition. All obligations were current at December 31, 2015 . At December 31, 2015 and December 31, 2014 , we had an estimated liability of $8 million and $9 million , respectively, related to these guarantees and letters of credit. In 2001, we formed the TRS joint venture with Thales S.A. See additional background on the TRS joint venture in "Note 9: Other Assets, Net" within Item 8 of this Form 10-K. On December 24, 2015 Thales S.A. and Raytheon entered into a letter agreement relating to the joint venture agreement for the TRS joint venture (excluding Thales-Raytheon Systems Air and Missile Defense Command and Control S.A.S (TRS AMDC2), previously called Air Command Systems International S.A.S). The letter agreement contemplates that the parties will use their commercially reasonable efforts to amend the joint venture agreement on or before June 30, 2016 to reduce its existing scope of work to NATO-only business opportunities involving air command and control systems. In connection with the contemplated changes, we will reacquire Thales S.A.'s noncontrolling interest in Thales-Raytheon Systems LLC (TRS LLC) and sell our equity method interest in TRS SAS, with a net payment due to Thales S.A. totaling $90 million based on the relative values and undistributed earnings of TRS LLC and TRS SAS. Any gain or loss resulting from the transactions contemplated by the letter agreement will be recognized upon completion of a definitive agreement and resolution of all contingencies which is expected to occur on or before June 30, 2016. The TRS joint venture will continue to operate under the current structure until the close of the transactions. We have an approximately $400 million international classified contract that did not achieve certain contractual milestones in 2015. We are working with the customer to complete the milestones quickly and we currently do not expect to be terminated on the program. However, if we were terminated for default, it could result in a write-off currently estimated at $180 – $200 million . As discussed in "Note 5: Forcepoint Joint Venture", under the joint venture agreement between Raytheon Company and Vista Equity Partners, Raytheon may be required to purchase Vista Equity Partners' interest in Forcepoint. We have entered into industrial cooperation agreements, sometimes referred to as offset agreements, as a condition to obtaining orders for our products and services from certain customers in foreign countries. At December 31, 2015 , the aggregate amount of our offset agreements had an outstanding notional value of approximately $5.5 billion . These agreements are designed to return economic value to the foreign country by requiring us to engage in activities supporting local defense or commercial industries, promoting a balance of trade, developing in-country technology capabilities, or addressing other local development priorities. Offset agreements may be satisfied through activities that do not require a direct cash payment, including transferring technology, providing manufacturing, training and other consulting support to in-country projects, and the purchase by third parties (e.g., our vendors) of supplies from in-country vendors. These agreements may also be satisfied through our use of cash for activities such as subcontracting with local partners, purchasing supplies from in-country vendors, providing financial support for in-country projects, and making investments in local ventures. Such activities may also vary by country depending upon requirements as dictated by their governments. We typically do not commit to offset agreements until orders for our products or services are definitive. The amounts ultimately applied against our offset agreements are based on negotiations with the customers and typically require cash outlays that represent only a fraction of the notional value in the offset agreements. Offset programs usually extend over several or more years and may provide for penalties in the event we fail to perform in accordance with offset requirements. We have historically not been required to pay any such penalties. As a U.S. government contractor, we are subject to many levels of audit and investigation by the U.S. government relating to our contract performance and compliance with applicable rules and regulations. Agencies that oversee contract performance include: the Defense Contract Audit Agency (DCAA); the Defense Contract Management Agency (DCMA); the Inspector General of the U.S. Department of Defense (DoD) and other departments and agencies; the Government Accountability Office; the Department of Justice (DoJ); and Congressional Committees. From time to time, these and other agencies investigate or conduct audits to determine whether our operations are being conducted in accordance with applicable requirements. Such investigations and audits could result in administrative, civil or criminal liabilities, including repayments, fines or penalties being imposed upon us, the suspension of government export licenses or the suspension or debarment from future U.S. government contracting. U.S. government investigations often take years to complete and many result in no adverse action against us. Our final allowable incurred costs for each year are also subject to audit and have from time to time resulted in disputes between us and the U.S. government with litigation resulting at the Court of Federal Claims (COFC) or the Armed Services Board of Contract Appeals (ASBCA) or their related courts of appeals. In addition, the DoJ has, from time to time, convened grand juries to investigate possible irregularities by us. We also provide products and services to customers outside of the U.S. and those sales are subject to local government laws, regulations, and procurement policies and practices. Our compliance with such local government regulations or any applicable U.S. government regulations (e.g., the Foreign Corrupt Practices Act (FCPA) and the International Traffic in Arms Regulations (ITAR)) may also be investigated or audited. Other than as specifically disclosed herein, we do not expect these audits, investigations or disputes to have a material effect on our financial position, results of operations or liquidity, either individually or in the aggregate. In addition, various other claims and legal proceedings generally incidental to the normal course of business are pending or threatened against, or initiated by, us. We do not expect any of these proceedings to result in any additional liability or gains that would materially affect our financial position, results of operations or liquidity. In connection with certain of our legal matters, we may be entitled to insurance recovery for qualified legal costs. We do not expect any insurance recovery to have a material impact on the financial exposure that could result from these matters. Product Warranty —We provide for product warranties in conjunction with certain product sales for which we recognize revenue upon delivery. Activity related to product warranty accruals was as follows: (In millions) 2015 2014 2013 Beginning balance $ 32 $ 30 $ 33 Provisions for warranties 1 9 3 Warranty services provided (9 ) (7 ) (6 ) Ending balance $ 24 $ 32 $ 30 We account for warranty provision costs incurred under our long-term contracts using the cost-to-cost measure of progress as contracts costs, as the estimation of these costs is integral in determining the price of the related long-term contracts. The table above excludes these costs.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity The changes in shares of our common stock outstanding were as follows: (In millions) 2015 2014 2013 Beginning balance 307.3 314.5 328.1 Stock plans activity 1.6 1.4 2.4 Share repurchases (9.9 ) (8.6 ) (16.0 ) Ending balance 299.0 307.3 314.5 From time to time, our Board of Directors authorizes the repurchase of shares of our common stock. In September 2011, our Board authorized the repurchase of up to $2.0 billion of our outstanding common stock. Our Board also authorized the repurchase of up to an additional $2.0 billion of our outstanding common stock in November 2013 and up to another additional $2.0 billion of our outstanding common stock in November 2015. At December 31, 2015 , we had approximately $2.5 billion available under the 2015 and 2013 repurchase programs. Share repurchases will take place from time to time at management’s discretion depending on market conditions. Share repurchases also include shares surrendered by employees to satisfy tax withholding obligations in connection with restricted stock , RSUs, stock options and LTPP awards issued to employees. Our share repurchases were as follows: (In millions) 2015 2014 2013 $ Shares $ Shares $ Shares Shares repurchased under our share repurchase programs $ 1,000 9.0 $ 750 7.7 $ 1,075 15.2 Shares repurchased to satisfy tax withholding obligations 99 0.9 90 0.9 48 0.8 Total share repurchases $ 1,099 9.9 $ 840 8.6 $ 1,123 16.0 In March 2015, our Board of Directors authorized an 11% increase to our annual dividend payout rate from $2.42 to $2.68 per share. Our Board of Directors declared dividends of $2.68 , $2.42 and $2.20 per share in 2015 , 2014 and 2013 , respectively. Dividends are subject to quarterly approval by our Board of Directors.

Stock-based Compensation Plans

Stock-based Compensation Plans	12 Months Ended
	Dec. 31, 2015
Share-based Compensation [Abstract]
Stock-based Compensation Plans	Stock-based Compensation Plans The Raytheon 2010 Stock Plan provides for shares to be issued as stock options, stock appreciation rights, restricted stock, RSUs or stock grants, including awards based on performance criteria. The plan authorizes the issuance of 7.5 million shares in addition to shares available under certain prior plans of the Company. The total maximum number of shares originally authorized for issuance under the 2010 Stock Plan and those certain prior plans is 41.8 million . The 2010 Stock Plan provides that awards to our employees, officers and consultants are generally made by the Management Development and Compensation Committee of our Board of Directors (MDCC) and are compensatory in nature, while awards to our non-employee directors are made by the Board's Governance and Nominating Committee. Shares issued as a result of stock awards, stock option exercises or conversion of restricted stock unit awards will be funded through the issuance of shares under the 2010 Stock Plan. At December 31, 2015 there were 7.0 million shares available for new awards and 4.7 million shares outstanding. Stock-based compensation expense and the associated tax benefit recognized were as follows: (In millions) 2015 2014 2013 Stock-based compensation expense Restricted stock expense $ 92 $ 81 $ 82 RSU expense 26 28 3 LTPP expense 22 39 44 Total stock-based compensation expense $ 140 $ 148 $ 129 Stock-based tax benefit recognized 44 48 39 At December 31, 2015 , there was $156 million of compensation expense related to nonvested awards not yet recognized which is expected to be recognized over a weighted-average period of 1.5 years . Restricted Stock and Restricted Stock Units (RSUs) Restricted stock awards vest over a specified period of time as determined by the MDCC, generally four years for employee awards and one year for nonemployee directors. Restricted stock awards entitle the recipient to full dividend and voting rights beginning on the date of grant. Non-vested shares are restricted as to disposition and subject to forfeiture under certain circumstances. At the date of grant each share of restricted stock is credited to common stock at par value. The fair value of restricted stock, calculated under the intrinsic value method at the date of grant, is charged to income as compensation expense generally over the vesting period with a corresponding credit to additional paid-in capital. RSUs also vest over a specified period of time as determined by the MDCC, are compensatory in nature and are primarily awarded to retirement eligible employees. Retirement eligible recipients of RSUs are entitled to full dividend rights beginning on the date of grant. In addition, RSUs granted to retirement eligible employees continue to vest, but do not accelerate, on the scheduled vesting dates into retirement subject to the recipient's compliance with certain post-employment covenants. Since recipients of RSUs with continued vesting provisions have satisfied the service requirement of the award at the date of grant, the Company recognizes all of the stock-based compensation expense associated with the RSUs awarded to retirement eligible employees in the period the award is granted. Restricted stock and RSU activity was as follows: Shares/units (in thousands) Weighted-Average Grant Date Fair Value Outstanding at December 31, 2012 5,838 $ 49.98 Granted 1,855 67.46 Vested (1,708 ) 48.93 Forfeited (648 ) 52.39 Outstanding at December 31, 2013 5,337 56.10 Granted 1,355 96.84 Vested (1,648 ) 51.30 Forfeited (526 ) 58.74 Outstanding at December 31, 2014 4,518 69.76 Granted 1,242 110.28 Vested (1,597 ) 57.65 Forfeited (423 ) 77.02 Outstanding at December 31, 2015 3,740 $ 87.57 The total fair value of restricted stock and RSUs vested and the related tax benefit realized were as follows: (In millions) 2015 2014 2013 Fair value of restricted stock and RSUs vested $ 167 $ 161 $ 116 Tax benefit realized related to vested shares/units 58 56 41 Long-term Performance Plan (LTPP) In 2004, we established the LTPP, which provides for restricted stock unit awards granted from our stock plans to our senior leadership. Recipients of LTPP awards have no voting rights and receive dividend equivalent units. The vesting of LTTP awards and related dividend equivalent units is based upon the achievement of specific pre-established levels of performance at the end of a three -year performance cycle. In the event of a retirement, vesting for awards will not accelerate and instead will vest in accordance with the original vesting conditions on a pro-rated basis. The performance goals for the three outstanding performance cycles at December 31, 2015 , are independent of each other and based on three metrics, as defined in the award agreements: return on invested capital (ROIC), weighted at 50% ; total shareholder return (TSR) relative to a peer group, weighted at 25% ; and cumulative free cash flow from continuing operations (CFCF), weighted at 25% . Depending on the achievement of these metrics, a recipient of the award is entitled to receive a number of ordinary shares equal to a percentage, ranging from zero to 200% of the award granted. Compensation expense for the awards is recognized on a straight-line basis from the grant date through the end of the performance period based upon the value determined under the intrinsic value method for the CFCF and ROIC portions of the award and the Monte Carlo simulation method for the TSR portion of the award. Compensation expense for the CFCF and ROIC portions of the awards will be adjusted based upon the expected achievement of those performance goals. The assumptions used in the Monte Carlo model for the TSR portion of the awards granted during each year were as follows: 2015 2014 2013 Expected stock price volatility 16.90 % 18.93 % 20.16 % Peer group stock price volatility 19.37 % 23.19 % 25.42 % Correlations of returns 59.51 % 68.01 % 70.53 % Risk free interest rate 0.89 % 0.87 % 0.38 % LTPP activity related to the expected units was as follows (1) : Units (in thousands) Weighted-Average Grant Date Fair Value Outstanding at December 31, 2012 1,420 $ 52.57 Granted 402 61.38 Increase due to expected performance 398 53.86 Vested (383 ) 55.74 Forfeited (10 ) 51.22 Outstanding at December 31, 2013 1,827 54.13 Granted 280 97.59 Increase due to expected performance 99 39.50 Vested (664 ) 52.33 Forfeited (134 ) 75.80 Outstanding at December 31, 2014 1,408 60.53 Granted 189 112.14 Increase due to expected performance 148 73.70 Vested (797 ) 50.83 Forfeited (33 ) 85.16 Outstanding at December 31, 2015 915 $ 80.83 (1) This table excludes 50 thousand , 93 thousand and 114 thousand expected dividend equivalent units outstanding at December 31, 2015 , December 31, 2014 and December 31, 2013 , respectively, based on expected performance on each reporting date. The total fair value of LTPP units vested and the related tax benefit realized were as follows: (In millions) 2015 2014 2013 Fair value of LTPP units vested $ 93 $ 70 $ 23 Tax benefit realized related to vested LTPP units 33 25 8 In the third quarter of 2015, Forcepoint established long-term incentive plans that provide for awards of unit appreciation rights and profits interests in the joint venture to Forcepoint management and key employees. Awards are approved by the Board of Forcepoint. These awards vest over a specified period of time and settlement is subject to a liquidity event defined as either a change in control or an initial public offering of the joint venture. In 2015 , Forcepoint issued 12 thousand unit appreciation rights, all of which remained outstanding at December 31, 2015 . Also in 2015 , Forcepoint issued 53 thousand profits interests, 1 thousand of which were forfeited and 52 thousand of which remained outstanding at December 31, 2015 . The fair value of the awards is determined using the Black-Scholes valuation model and compensation expense is recognized over the requisite service period when achievement of the liquidity event is considered probable. No compensation expense has been recognized for these plans to date. The weighted-average assumptions used in the Black-Scholes model and the weighted-average grant date fair value for the Forcepoint awards granted in 2015 were as follows: Unit Price $ 1,000 Expected life (in years) 3.5 Expected unit price volatility 56.96 % Risk free interest rate 1.21 % Dividend yield — % Grant date fair value $ 418.13 Stock Options In 2004, we changed the primary form of our broad-based equity compensation from stock options to restricted stock. There have been no stock options granted since 2005. There were no stock options outstanding at December 31, 2015 .

Pension and Other Employee Bene

Pension and Other Employee Benefits	12 Months Ended
	Dec. 31, 2015
Pension and Other Postretirement Benefit Expense [Abstract]
Pension and Other Employee Benefits	Pension and Other Employee Benefits We have pension plans covering the majority of our employees, including certain employees in foreign countries (Pension Benefits). Our primary pension obligations relate to our domestic IRS qualified pension plans. We also provide certain health care and life insurance benefits to retired employees and to eligible employees upon retirement through other postretirement benefit (PRB) plans. The fair value of plan assets for our domestic and foreign Pension Benefits plans was as follows: (In millions) 2015 2014 Domestic Pension Benefits plan $ 18,063 $ 19,352 Foreign Pension Benefits plan 837 868 We maintain a defined contribution plan that includes a 401(k) plan. Covered employees hired or rehired after January 1, 2007 are eligible for a Company contribution based on age and service, instead of participating in our pension plans. These and other covered employees are eligible to contribute up to a specific percentage of their pay to the 401(k) plan. We match the employee’s contribution, generally up to 3% or 4% of the employee’s pay, which is invested in the same way as employee contributions. Total expense for our contributions was $276 million , $274 million and $279 million in 2015 , 2014 and 2013 , respectively. At December 31, 2015 and December 31, 2014 , there was $14.6 billion and $14.9 billion invested in our defined contribution plan, respectively. At December 31, 2015 and December 31, 2014 , $1.5 billion and $1.4 billion of these amounts were invested in our stock fund, respectively. We also sponsor nonqualified defined benefit and defined contribution plans to provide benefits in excess of qualified plan limits. We have set aside certain assets in a separate trust, which we expect to be used to pay for trust obligations. The fair value of marketable securities held in trust, which are considered Level 1 assets under the fair value hierarchy, consisted of the following at December 31: (In millions) 2015 2014 Marketable securities held in trust $ 525 $ 519 Included in marketable securities held in trust in the table above was $337 million and $328 million at December 31, 2015 and December 31, 2014 , respectively, related to the nonqualified defined contribution plans. The liabilities related to the nonqualified defined contribution plans were $337 million and $327 million at December 31, 2015 and December 31, 2014 , respectively. We also maintain additional contractual pension benefits agreements for certain executive officers. The liability associated with such agreements was $38 million and $39 million at December 31, 2015 and December 31, 2014 , respectively. Contributions and Benefit Payments We may make both required and discretionary contributions to our pension plans. Required contributions are primarily determined in accordance with the Pension Protection Act (PPA), which amended the Employee Retirement Income Security Act of 1974 (ERISA) rules and are affected by the actual return on plan assets (ROA) and plan funded status. The funding requirements under the PPA require us to fully fund our pension plans over a rolling seven-year period as determined annually based upon the funded status at the beginning of the year. In July 2012, the Surface Transportation Extension Act (STE Act), was passed by Congress and signed by the President. The STE Act includes a provision for temporary pension funding relief due to the low interest rate environment. The provision adjusts the 24-month average high quality corporate bond rates used to determine the PPA funded status so that they are within a floor and cap, or “corridor,” based on the 25-year average of corporate bond rates. The STE Act gradually phased out this interest rate provision beginning in 2013. Subsequent to the STE Act, the Highway and Transportation Funding Act of 2014 (HATFA) and the Bipartisan Budget Act of 2015 (BBA) further extended this interest rate provision until 2020, at which time the provision is gradually phased out. We made the following contributions to our pension and PRB plans during the years ended December 31: (In millions) 2015 2014 2013 Required pension contributions $ 339 $ 650 $ 778 Discretionary pension contributions 200 600 300 PRB contributions 22 20 22 Total $ 561 $ 1,270 $ 1,100 We periodically evaluate whether to make additional discretionary contributions. We expect to make required contributions of approximately $140 million and $25 million to our pension and PRB plans, respectively, in 2016 . The table below reflects the total Pension Benefits expected to be paid from the plans or from our assets, including both our share of the benefit cost and the participants’ share of the cost, which is funded by participant contributions. PRB Benefits expected to be paid reflect our portion only. (In millions) Pension Benefits PRB Benefits 2016 $ 1,871 $ 61 2017 1,838 61 2018 1,741 61 2019 1,500 60 2020 1,509 60 Thereafter (next 5 years) 7,804 266 Defined Benefit Retirement Plan Summary Financial Information The tables below outline the components of net periodic benefit expense (income) and related actuarial assumptions of our domestic and foreign Pension Benefits and PRB Benefits plans. Components of Net Periodic Pension Expense (Income) Pension Benefits (In millions) 2015 2014 2013 Service cost $ 537 $ 448 $ 579 Interest cost 1,047 1,128 996 Expected return on plan assets (1,533 ) (1,580 ) (1,495 ) Amounts reflected in net funded status 51 (4 ) 80 Amortization of prior service cost included in net periodic pension expense 7 7 9 Recognized net actuarial loss 1,127 891 1,150 Loss recognized due to settlements 1 1 1 Amounts reclassified during the year 1,135 899 1,160 Net periodic pension expense (income) $ 1,186 $ 895 $ 1,240 Net periodic pension expense (income) also includes income from foreign Pension Benefits plans of $5 million in 2015 , income of $9 million in 2014 and expense of $4 million and 2013 . Components of Net Periodic PRB Expense (Income) PRB Benefits (In millions) 2015 2014 2013 Service cost $ 7 $ 6 $ 8 Interest cost 30 35 32 Expected return on plan assets (28 ) (33 ) (32 ) Amounts reflected in net funded status 9 8 8 Amortization of prior service cost included in net periodic PRB expense (1 ) (1 ) (2 ) Recognized net actuarial loss 2 1 4 Loss recognized due to settlements 2 — — Amounts reclassified during the year 3 — 2 Net periodic PRB expense (income) $ 12 $ 8 $ 10 Funded Status – Amounts Recognized on our Balance Sheets Pension Benefits PRB Benefits (In millions) December 31: 2015 2014 2015 2014 Noncurrent assets $ 43 $ 28 $ — $ — Current liabilities (114 ) (98 ) (13 ) (12 ) Noncurrent liabilities (6,474 ) (6,359 ) (352 ) (352 ) Net amount recognized on our balance sheets $ (6,545 ) $ (6,429 ) $ (365 ) $ (364 ) Reconciliation of Amounts Recognized on our Balance Sheets Pension Benefits PRB Benefits (In millions) December 31: 2015 2014 2015 2014 Accumulated other comprehensive loss: Prior service (cost) credit $ (14 ) $ (18 ) $ 2 $ 4 Net loss (10,793 ) (11,325 ) (107 ) (98 ) Accumulated other comprehensive loss (10,807 ) (11,343 ) (105 ) (94 ) Accumulated contributions in excess (below) net periodic benefit or cost 4,262 4,914 (260 ) (270 ) Net amount recognized on our balance sheets $ (6,545 ) $ (6,429 ) $ (365 ) $ (364 ) Sources of Change in Accumulated Other Comprehensive Loss Pension Benefits PRB Benefits (In millions) 2015 2014 2015 2014 Prior service (cost) credit arising during period $ (1 ) $ (11 ) $ (1 ) $ — Amortization of prior service cost (credit) included in net income 7 7 (1 ) (1 ) Net change in prior service (cost) credit not recognized in net income during that period 6 (4 ) (2 ) (1 ) Actuarial gain (loss) arising during period (609 ) (4,334 ) (13 ) (76 ) Amortization of net actuarial (gain) loss included in net income 1,127 891 2 1 Loss due to curtailments/settlements 2 — 2 — Net change in actuarial gain (loss) not included in net income during the period 520 (3,443 ) (9 ) (75 ) Effect of exchange rates 10 9 — — Total change in accumulated other comprehensive loss during period $ 536 $ (3,438 ) $ (11 ) $ (76 ) The amounts in accumulated other comprehensive loss at December 31, 2015 expected to be recognized as components of net periodic benefit cost in 2016 are as follows: (in millions) Pension Benefits PRB Benefits Amortization of net loss $ (979 ) $ (4 ) Amortization of prior service (cost) credit (5 ) 1 Total $ (984 ) $ (3 ) The projected benefit obligation (PBO) represents the present value of Pension Benefits earned through the end of the year, with an allowance for future salary increases. The accumulated benefit obligation (ABO) is similar to the PBO, but does not provide for future salary increases. The PBO, ABO and asset values for our domestic qualified pension plans were as follows: (In millions) 2015 2014 PBO for domestic qualified pension plans $ 23,623 $ 24,767 ABO for domestic qualified pension plans 21,598 22,570 Asset values for domestic qualified pension plans 18,063 19,352 The PBO and fair value of plans assets for Pension Benefits plans with PBOs in excess of plan assets were $24,699 million and $18,111 million , respectively, at December 31, 2015 and $25,916 million and $19,459 million , respectively, at December 31, 2014 . The ABO and fair value of plan assets for Pension Benefits plans with ABOs in excess of plan assets were $22,546 million and $18,111 million , respectively, at December 31, 2015 and $23,520 million and $19,406 million , respectively, at December 31, 2014 . The ABO for all Pension Benefits plans was $23,286 million and $24,298 million at December 31, 2015 and December 31, 2014 , respectively. The tables below provide a reconciliation of benefit obligations, plan assets and related actuarial assumptions of our domestic and foreign Pension Benefits and PRB plans. Change in Projected Benefit Obligation Pension Benefits PRB Benefits (In millions) 2015 2014 2015 2014 Projected benefit obligation at beginning of year $ 26,649 $ 22,970 $ 782 $ 732 Service cost 537 448 7 6 Interest cost 1,047 1,128 30 35 Plan participants’ contributions 10 12 50 50 Amendments 1 12 1 — Plan curtailments/settlements (5 ) (4 ) (9 ) — Actuarial loss (gain) (943 ) 4,007 (17 ) 67 Foreign exchange loss (gain) (47 ) (42 ) — — Benefits paid (1,804 ) (1,882 ) (99 ) (108 ) Projected benefit obligation at end of year $ 25,445 $ 26,649 $ 745 $ 782 The PBO for our domestic and foreign Pension Benefits plans was $24,605 million and $840 million , respectively at December 31, 2015 and $25,745 million and $904 million , respectively, at December 31, 2014 . Change in Plan Assets Pension Benefits PRB Benefits (In millions) 2015 2014 2015 2014 Fair value of plan assets at beginning of year $ 20,220 $ 19,628 $ 418 $ 431 Actual return (loss) on plan assets (19 ) 1,254 (2 ) 25 Company contributions 539 1,250 22 20 Plan participants’ contributions 10 12 50 50 Plan settlements (4 ) (4 ) (9 ) — Foreign exchange gain (loss) (42 ) (38 ) — — Benefits paid (1,804 ) (1,882 ) (99 ) (108 ) Fair value of plan assets at end of year $ 18,900 $ 20,220 $ 380 $ 418 Retirement Plan Assumptions Weighted-Average Net Periodic Benefit Cost Assumptions Pension Benefits 2015 2014 2013 Discount rate 4.06 % 5.06 % 4.15 % Expected long-term rate of return on plan assets 7.91 % 8.67 % 8.67 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% Average 4.41 % 4.40 % 4.40 % Weighted-Average Net Periodic Benefit Cost Assumptions PRB Benefits 2015 2014 2013 Discount rate 4.05 % 5.01 % 4.00 % Expected long-term rate of return on plan assets 7.01 % 8.24 % 8.24 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% Average 4.50 % 4.50 % 4.50 % Health care trend rate * 4.00 % 4.00 % 4.00 % * Currently at the ultimate trend rate. Weighted-Average Year-End Benefit Obligation Assumptions Pension Benefits PRB Benefits 2015 2014 2015 2014 Discount rate 4.45 % 4.06 % 4.42 % 4.05 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% 2%–7% Average 4.40 % 4.40 % 4.50 % 4.50 % Health care trend rate * 4.00 % 4.00 % * Currently at the ultimate trend rate. The weighted-average year-end benefit obligation discount rate for our domestic Pension Benefits plans was 4.47% and 4.08% at December 31, 2015 and December 31, 2014 , respectively. Our foreign Pension Benefits plan assumptions have been included in the Pension Benefits assumptions in the table above. The long-term ROA represents the average rate of earnings expected over the long term on the assets invested to provide for anticipated future benefit payment obligations. The long-term ROA used to calculate net periodic pension cost is set annually at the beginning of each year. Given the long-term nature of the ROA assumption, which we believe should not be solely reactive to short-term market conditions that may not persist, we expect the long-term ROA to remain unchanged unless there are significant changes in our investment strategy, the underlying economic assumptions, or other major factors. To establish our long-term ROA assumption we employ a “building block” approach. As part of our annual process for determining whether it is appropriate to change our long-term ROA assumption, we first review the existing long-term ROA assumption against a statistically determined reasonable range of outcomes. For purposes of determining the long-term ROA assumption for 2014 and prior, we considered this range to be between the 25th and 75th percentile likelihood of achieving a long-term return over future years, consistent with the Actuarial Standard of Practice No. 27, Selection of Economic Assumptions for Measuring Pension Obligations (ASOP 27) in effect at the time. Therefore, it is less than 25% likely that the long-term return of the pension plan would fall below or above the 25th and 75th percentiles points, respectively (i.e., it is 50% likely that the long-term return of the pension plan will be within the 25th and 75th percentile range). In September 2013, the Actuarial Standards Board issued a revision to ASOP 27, that replaced the explicit reference to the best estimate range concept with the selection of a reasonable assumption that considers multiple criteria including the purposes of measurement, the actuary’s professional judgment, historical and current economic data and estimates of future experience and has no significant bias. The revised standard is effective for assumptions established on or after September 30, 2014. As a result of the revised standard, we continue to evaluate our long-term ROA assumption against a reasonable range of possible outcomes but, effective for our 2015 and future years assumptions, we modified that range to be between the 35th to 65th percentile likelihood of achieving a long-term return over future years. We believe that continuing to validate our ROA assumption within a reasonable range that is narrowed to the 35th to 65th percentiles ensures an unbiased result while also ensuring that the ROA assumption is not solely reactive to short-term market conditions that may not persist, and is consistent with external actuarial practices. The building block approach and the reasonable range of outcomes are based upon our asset allocation assumptions and long-term capital market assumptions. Such assumptions incorporate the economic outlook for various asset classes over short- and long-term periods and also take into consideration other factors, including historical market performance, inflation and interest rates. The reasonable range of long-term returns that was used to validate the long-term ROA assumption for the calculation of the net periodic benefit cost for 2015 , 2014 and 2013 , are shown below. Percentile 2015 2014 2013 25 th N/A 5.53 % 5.62 % 35 th 6.37 % N/A N/A 65 th 8.37 % N/A N/A 75 th N/A 9.65 % 9.41 % The long-term domestic ROA of 8.75% for 2014 and 2013 fell between the 60th–65th percentile and 65th–70th percentile of the applicable reasonable range for 2014 and 2013 , respectively. The 50th percentile of the reasonable range used to develop the 2014 and 2013 long-term ROA was 7.59% and 7.51%, respectively. In the fourth quarter of 2014, we reduced our long-term target allocation for equities and increased our target allocation for fixed income within the investment policy allocations established by our Investment Committee in order to reduce the overall exposure to equity volatility. This change in asset allocation reduced the range of reasonable outcomes that we use to evaluate our long-term ROA assumption and we determined that the historical assumption of 8.75% no longer fell within this range. To develop our 2015 long-term ROA assumption, we employed a building block approach. Under this building block method, the overall expected investment return equals the weighted-average of the individual expected return for each asset class based on the target asset allocation and the long-term capital market assumptions. The expected return for each asset class is composed of inflation plus a risk-free rate of return, plus an expected risk premium for that asset class. The resulting return is then adjusted for administrative, investment management and trading expenses as well as recognition of alpha for active management. The building block approach resulted in a long-term ROA assumption of 8.0% for 2015. To validate this assumption we compared the result against the reasonable range of outcomes and confirmed that the 8.0% result falls between the 55th–60th percentile of the reasonable range for 2015 with the 50th percentile at 7.37%. In addition, when we updated our target asset allocation and our long-term ROA assumption changed from 8.75% to 8.0%, we assessed what our historical asset performance may have been since 1986 using the updated target allocation and concluded the average return would likely have been equal to or greater than 8.0% for the time period from 1986 through 2014. Based upon our application of the building block approach and our review of the resulting assumption against the 35th to 65th reasonable range and an analysis of our historical results, we have established a 2015 long-term ROA assumption of 8.0% and have determined that the new assumption is reasonable and consistent with the provisions of ASOP 27. Our domestic pension plans’ actual rates of return were approximately 0%, 6% and 15% for 2015 , 2014 and 2013 , respectively. The difference between the actual rate of return and our long-term ROA assumption is included in deferred losses. The long-term ROA assumptions for foreign Pension Benefits plans are based on the asset allocations and the economic environment prevailing in the locations where the Pension Benefits plans reside. Foreign pension assets do not make up a significant portion of the total assets for all of our Pension Benefits plans. For purposes of determining pension expense under U.S. 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% 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. The effect of a 1% increase or decrease in the assumed health care trend rate for each future year for the aggregate of service cost and interest cost is less than $1 million and for the accumulated postretirement benefit obligation is a $6 million increase or decrease. Plan Assets Substantially all our domestic Pension Benefits Plan (Plan) assets, which consist of investments in cash and cash equivalents, publicly traded U.S. and international equity securities, private equity funds, private real estate funds, fixed-income securities, commingled funds and other investments such as insurance contracts and derivatives, are held in a master trust, which was established for the investment of assets of our Company-sponsored retirement plans. The assets of the master trust are overseen by our Investment Committee comprised of members of senior management drawn from appropriate diversified levels of the executive management team. The Investment Committee is responsible for setting the policy that provides the framework for management of the Plan assets. In accordance with its responsibilities and charter, the Investment Committee meets on a regular basis to review the performance of the Plan assets and compliance with the investment policy. The policy sets forth an investment structure for managing Plan assets, including setting the asset allocation ranges, which are expected to provide an appropriate level of overall diversification and total investment return over the long term while maintaining sufficient liquidity to pay the benefits of the Plan. In developing the asset allocation ranges, third-party asset allocation studies are periodically performed that consider the current and expected positions of the plan assets and funded status. Based on these studies and other appropriate information, the Investment Committee establishes asset allocation ranges taking into account acceptable risk targets and associated returns. The investment policy asset allocation ranges for the Plan, as set by the Investment Committee, for the year ended December 31, 2015 were as follows: Asset Category Global equity (combined U.S. and international equity) 40%–60% U.S. equities 25%–40% International equities 15%–25% Fixed-income securities 25%–40% Cash and cash equivalents 1%–10% Private equity and private real estate 5%–22% Other (including absolute return funds) 5%–20% The Investment Committee appoints the investment fiduciary, who is responsible for making investment decisions within the framework of the Investment Policy, setting the long-term target allocation within the investment policy asset allocation ranges and for supervising the internal pension investment team. The pension investment team is comprised of experienced investment professionals, who are all employees of the Company. The investment fiduciary reports back to the Investment Committee. During times of unusual market conditions, the investment fiduciary may seek authorization from the Investment Committee to change the investing allocation ranges to reasonably limit excessive volatility or other undesirable consequences. Taking into account the asset allocation ranges, the investment fiduciary determines the specific allocation of the Plan’s investments within various asset classes. The Plan utilizes select investment strategies which are executed through separate account or fund structures with external investment managers who demonstrate experience and expertise in the appropriate asset classes and styles. The selection of investment managers is done with careful evaluation of all aspects of performance and risk, due diligence of internal operations and controls, reputation, systems evaluation and a review of investment managers' policies and processes. The Plan also utilizes funds that track an index and are highly liquid. Investment performance is monitored frequently against appropriate benchmarks and tracked to compliance guidelines with the assistance of third-party performance evaluation tools and metrics. Consistent with the objective of optimizing return on investment while taking into account investment risks that are prudent and reasonable given prevailing market conditions, multiple investment strategies are employed to diversify risk such that no single investment or manager holding represents a significant exposure to the total investment portfolio. Plan assets are invested in numerous diversified strategies with the intent to minimize correlations. This allows for diversification of returns. Plan assets can be invested in funds that track an index and are designed to achieve broad market diversification. The Plan had $2.2 billion invested in such funds across three indices as of December 31, 2015 . Other than funds that track an index, no individual investment strategy represented more than 5% of the Plan as of December 31, 2015 . Further, within each separate account strategy, guidelines are established which set forth the list of authorized investments, the typical portfolio characteristics and diversification required by limiting the amount that can be invested by sector, country and issuer. The Plan’s investments are stated at fair value. Investments in equity securities (common and preferred) are valued at the last reported sales price when an active market exists. Investments in fixed-income securities are generally valued using methods based upon market transactions for comparable securities and various relationships between securities which are generally recognized by institutional traders. Investments in private equity funds, private real estate funds and other commingled funds are estimated at fair market value, which primarily utilizes net asset values reported by the investment manager or fund administrator. We review additional valuation and pricing information from fund managers, including audited financial statements, to evaluate the net asset values. The fair value of our Plan assets by asset category and by level (as described in "Note 1: Summary of Significant Accounting Policies") at December 31, 2015 and December 31, 2014 were as follows: Fair Value Measurements at December 31, 2015 (In millions) Total Level 1 Level 2 Level 3 Not subject to leveling (7) U.S. equities (1) $ 5,341 $ 2,838 $ — $ — $ 2,503 International equities (1) 2,954 2,043 1 — 910 Fixed-income securities U.S. government and agency securities 344 258 86 — — Corporate debt securities/instruments (2) 2,671 109 2,440 — 122 Core fixed-income (3) 1,172 1,172 — — — Global multi-sector fixed-income (4) 434 434 — — — Securitized and structured credit (5) 818 — — — 818 Cash and cash equivalents (6) 877 637 1 — 239 Absolute return funds 1,406 — — — 1,406 Private equity funds 1,068 — — — 1,068 Private real estate funds 997 — — — 997 Insurance contracts 28 — — 28 — Total investments 18,110 7,491 2,528 28 8,063 Net receivables and payables (47 ) — — — (47 ) Total assets $ 18,063 $ 7,491 $ 2,528 $ 28 $ 8,016 Fair Value Measurements at December 31, 2014 (In millions) Total Level 1 Level 2 Level 3 Not subject to leveling (7) U.S. equities (1) $ 6,833 $ 3,268 $ — $ — $ 3,565 International equities (1) 2,792 1,749 — — 1,043 Fixed-income securities U.S. government and agency securities 112 104 8 — — Corporate debt securities/instruments (2) 2,813 161 2,528 — 124 Core fixed-income (3) 1,215 1,098 — — 117 Global multi-sector fixed-income (4) 456 456 — — — Securitized and structured credit (5) 1,006 — — — 1,006 Cash and cash equivalents (6) 820 558 158 — 104 Absolute return funds 1,478 — — — 1,478 Private equity funds 938 — — — 938 Private real estate funds 692 — — — 692 Insurance contracts 28 — — 28 — Total investments 19,183 7,394 2,694 28 9,067 Net receivables and payables 169 — — — 169 Total assets $ 19,352 $ 7,394 $ 2,694 $ 28 $ 9,236 (1) U.S. and International equities primarily include investments across the spectrum of large, medium and small market capitalization stocks. (2) Corporate debt securities/instruments include investment grade and non-investment grade bonds. (3) Core fixed-income securities are funds that invest primarily in intermediate-term high quality domestic bonds issued by various governmental or private sector entities. (4) Global multi-sector fixed-income investments are funds that invest globally among several sectors including governments, investment grade corporate bonds, high yield corporate bonds and emerging market bonds. (5) Securitized and structured credit include fixed-income funds and securities that pool together various cash flow producing financial assets that are structured in a way that can achieve desired targeted credit, maturity or other characteristics and are typically collateralized by residential mortgages, commercial mortgages and other assets, and other fixed income related securities. (6) Cash and cash equivalents are invested in highly liquid money market funds. Included in cash and cash equivalents is excess cash in investment manager accounts. This cash is available for immediate use and is used to fund daily operations and execute the investment policy. This amount is not considered to be part of the cash target allocation set forth in the investment policy. (7) Receivables, payables and certain investments that are valued using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amount presented for the total domestic pension benefits plan assets. A reconciliation of investments with significant unobservable inputs (Level 3) has not been provided as the amounts are immaterial. The Plan limits the use of derivatives through direct or separate account investments such that the derivatives used are liquid and able to be readily valued in the market. Derivative usage in separate account structures is limited to hedging purposes or to gain market exposure in a non-speculative manner. The fair market value of the Plan’s derivatives through direct or separate account investments was approximately less than $1 million and $(7) million as of December 31, 2015 and December 31, 2014 , respectively. In addition, assets are held in trust for non-U.S. Pension Benefits plans, primarily in the U.K. and Canada, which are governed locally in accordance with specific jurisdictional requirements. These assets are overseen by local management in Canada and by trustees with a combination of members representing plan participants and local management in the U.K. Investments in the non-U.S. Pension Benefits plans consist primarily of fixed-income securities and equity securities and had a fair market value of $837 million and $868 million at December 31, 2015 and December 31, 2014 , respectively. These investments are valued using quoted prices in active markets (Level 1) as well as significant observable inputs (Level 2). Investments with significant unobservable inputs (Level 3) are immaterial in the non-U.S. Pension Benefits plans. The fair market value of assets related to our PRB Benefits was $380 million and $418 million as of December 31, 2015 and December 31, 2014 , respectively. These assets included $169 million and $185 million at December 31, 2015 and December 31, 2014 , respectively, that were invested in the master trust described above and are therefore invested in the same assets described above. The remaining investments are held within Voluntary Employees’ Beneficiary Association (VEBA) trusts. The assets of the VEBA trusts are also overseen by the Investment Committee and managed by the same investment fiduciary that manages the master trust’s investments. These assets are generally invested in mutual funds and are valued primarily using quoted prices in active markets (Level 1) as well as significant observable inputs (Level 2). There were no Level 3 investments in the VEBA trusts at December 31, 2015 or December 31, 2014 . The table below details assets by category for our VEBA trusts. These assets consist primarily of publicly-traded equity securities and publicly-traded fixed-income securities. % of Plan Assets at Dec 31: Asset category 2015 2014 Fixed-income securities 45 % 46 % U.S. equities 40 % 41 % International equities 10 % 10 % Cash and cash equivalents 5 % 3 % Total 100 % 100 %

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes The provision for federal and foreign income taxes consisted of the following: (In millions) 2015 2014 2013 Current income tax expense Federal $ 757 $ 837 $ 723 Foreign 36 13 17 State (4 ) — — Deferred income tax expense (benefit) Federal (103 ) (73 ) 36 Foreign 45 13 32 State 2 — — Total $ 733 $ 790 $ 808 The expense for income taxes differs from the U.S. statutory rate due to the following: 2015 2014 2013 Statutory tax rate 35.0 % 35.0 % 35.0 % Research and development tax credit (1.2 ) (1.1 ) (1.8 ) Tax settlements and refund claims (3.2 ) (0.5 ) (0.8 ) Domestic manufacturing deduction benefit (3.1 ) (2.7 ) (2.1 ) Foreign income tax rate differential (1.4 ) (0.6 ) — Tax benefit on foreign dividend — (2.8 ) — Other, net 0.2 (0.8 ) (1.0 ) Effective tax rate 26.3 % 26.5 % 29.3 % In December 2015, U.S. legislation was enacted to permanently reinstate the Research & Development tax credit (R&D tax credit) which had expired on December 31, 2014. In the fourth quarter of 2015, we recorded a full year benefit of approximately $33 million related to the 2015 R&D tax credit. In 2014, we recorded a full year benefit of approximately $30 million related to the 2014 R&D tax credit. We are subject to income taxes in the U.S. and numerous foreign jurisdictions. We have participated in the IRS Compliance Assurance Process (CAP) program since 2011. In the second quarter of 2015 the IRS completed the examination for the 2013 tax year, which completed all examinations through 2013. As a result of closing federal and state audit examinations, our unrecognized tax benefits decreased by approximately $100 million , inclusive of interest, the majority of which impacted income from continuing operations. We continue to participate in the CAP program for the 2014 and 2015 tax years. We are also under audit by multiple state and foreign tax authorities. During 2014, a foreign subsidiary authorized and completed a transaction which resulted in a taxable dividend of approximately $115 million . The transaction did not affect our indefinite reinvestment assertion because it generated a net tax benefit of approximately $80 million . During 2013, the IRS completed its examination of our 2009 and 2012 tax years and we received final approval from the U.S. Congressional Joint Committee on Taxation of a refund claim related to the 2011 tax year. As a result of closing the federal audit examinations, our unrecognized tax benefits decreased by approximately $70 million , inclusive of interest, the majority of which did not impact our income from continuing operations. (In millions) 2015 2014 2013 Domestic income from continuing operations before taxes $ 2,482 $ 2,868 $ 2,612 Foreign income from continuing operations before taxes 305 115 145 At December 31, 2015 , foreign earnings of approximately $688 million have been retained by foreign subsidiaries for reinvestment. No provision has been made for deferred taxes on undistributed earnings of non-U.S. subsidiaries as these earnings have been indefinitely invested or are expected to be remitted substantially free of additional tax. Determination of the amount of unrecognized deferred tax liability on these undistributed earnings is not practicable because of the complexity of laws and regulations, the varying tax treatment of alternative repatriation scenarios, and the variation due to multiple potential assumptions relating to the timing of any future repatriation. We made the following net tax payments during the years ended December 31: (In millions) 2015 2014 2013 Federal $ 1,008 $ 705 $ 628 Foreign 43 19 22 State 30 35 39 We believe that our income tax reserves are adequate; however, amounts asserted by taxing authorities could be greater or less than amounts accrued and reflected in our consolidated balance sheets. Accordingly, we could record adjustments to the amounts for federal, foreign and state tax-related liabilities in the future as we revise estimates or we settle or otherwise resolve the underlying matters. In the ordinary course of business, we may take new positions that could increase or decrease our unrecognized tax benefits in future periods. The balance of unrecognized tax benefits, exclusive of interest, was $7 million and $104 million at December 31, 2015 and December 31, 2014 , respectively, the majority of which would affect earnings if recognized. We accrue interest and penalties related to unrecognized tax benefits in tax expense. At December 31, 2015 , December 31, 2014 and December 31, 2013 , we had $2 million , $6 million and $5 million of interest accrued related to unrecognized tax benefits, which, net of the federal tax benefit, was approximately $0.5 million , $4 million and $3 million , respectively. A rollforward of our unrecognized tax benefits was as follows: (In millions) 2015 2014 2013 Unrecognized tax benefits, beginning of year $ 104 $ 118 $ 129 Additions based on current year tax positions 4 1 104 Additions based on prior year tax positions 1 10 — Reductions based on prior year tax positions (102 ) (25 ) (64 ) Settlements based on prior year tax positions — — (51 ) Unrecognized tax benefits, end of year $ 7 $ 104 $ 118 With the exception of Forcepoint, we generally account for our state income tax expense as a deferred contract cost, to the extent we can recover this expense through the pricing of our products and services to the U.S. government. We include this deferred amount in contracts in process, net, until allocated to our contracts, which generally occurs upon payment or when otherwise agreed as allocable with the U.S. government. Net state income tax expense allocated to our contracts was $28 million , $41 million and $42 million in 2015 , 2014 and 2013 , respectively. We include state income tax expense allocated to our contracts in administrative and selling expenses. Deferred income taxes consisted of the following at December 31: (In millions) 2015 2014 Noncurrent deferred tax assets (liabilities) (1) Accrued employee compensation and benefits $ 322 $ 242 Other accrued expenses and reserves 133 132 Contracts in process and inventories (841 ) (539 ) Pension benefits 2,355 2,242 Other retiree benefits 109 110 Net operating loss and tax credit carryforwards 115 101 Depreciation and amortization (1,385 ) (1,337 ) Other 79 106 Deferred income taxes-noncurrent $ 887 $ 1,057 (1) Noncurrent deferred tax assets (liabilities) amounts at both December 31, 2015 and December 31, 2014 include the reclassification of current deferred tax assets and liabilities to noncurrent in accordance with ASU 2015-17. See "Note 1: Summary of Significant Accounting Policies" for additional information. As of December 31, 2015 , we had U.S. federal and State net operating loss carryforwards related to Forcepoint of approximately $155 million and $114 million , respectively, which expire at various dates through 2034. We also had foreign net operating loss carryforwards of approximately $133 million , with the majority generated in the U.K. where net operating losses may be carried forward indefinitely. We believe that we have sufficient taxable income to realize these deferred tax assets. The tax expense (benefit) related to discontinued operations was $(14) million , $23 million and $(5) million in 2015 , 2014 and 2013 , respectively.

Business Segment Reporting

Business Segment Reporting	12 Months Ended
	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Business Segment Reporting	Business Segment Reporting Our reportable segments, organized based on capabilities and technologies, are: Integrated Defense Systems (IDS); Intelligence, Information and Services (IIS); Missile Systems (MS); Space and Airborne Systems (SAS); and Forcepoint. IDS is a leader in integrated air and missile defense; large land- and sea-based radar solutions; command, control, communications, computers, cyber and intelligence (C5I™) solutions; and naval combat and ship electronic systems. IDS delivers combat-proven performance against the complete spectrum of airborne and ballistic missile threats and is a world leader in the technology, development, and production of sensors and mission systems. IIS provides a full range of technical and professional services to intelligence, defense, federal and commercial customers worldwide. IIS specializes in global Intelligence, Surveillance and Reconnaissance (ISR); navigation; U.S. Department of Defense (DoD) space and weather solutions; cybersecurity; analytics; training; logistics; mission support; engineering; automation and sustainment solutions; and international and domestic Air Traffic Management (ATM) systems. MS is a premier developer and producer of missile and combat systems for the armed forces of the U.S. and other allied nations. Leveraging its capabilities in advanced airframes, guidance and navigation systems, high-resolution sensors, surveillance, targeting, and netted systems, MS develops and supports a broad range of advanced weapon systems, including missiles, smart munitions, close-in weapon systems, projectiles, kinetic kill vehicles, directed energy effectors and advanced combat sensor solutions. SAS is a leader in the design and development of integrated sensor and communication systems for advanced missions, including traditional and non-traditional ISR, precision engagement, unmanned aerial operations, and space. Leveraging advanced concepts, state-of-the-art technologies and mission systems knowledge, SAS provides electro-optical/infrared (EO/IR) sensors, airborne radars for surveillance and fire control applications, lasers, precision guidance systems, signals intelligence systems, processors, electronic warfare systems, communication systems, and space-qualified systems for civil and military applications. Forcepoint is a global provider of information technology security products and related services designed to protect commercial and government organizations and their customers and other users from external and internal threats, including modern cyber-threats, advanced malware attacks, information leaks, legal liability and productivity loss. Forcepoint is a joint venture company (with Vista Equity Partners) created in May 2015 through a series of transactions by which Raytheon acquired Websense from Vista Equity Partners and combined it with RCP, formerly part of the IIS segment, and then sold a minority interest in the combined company to Vista Equity Partners. The new company combines Raytheon's advanced cybersecurity technologies and Websense's industry-leading TRITON platform to provide defense-grade cybersecurity solutions to domestic and international customers. The amounts, discussion and presentation of our business segments, including Corporate and eliminations for intersegment activity, set forth in this Form 10-K, reflect the Forcepoint transaction. The Forcepoint results reflect RCP results for all periods and Websense results after the acquisition date of May 29, 2015. Segment total net sales and operating income generally include intersegment sales and profit recorded at cost plus a specified fee, which may differ from what the selling entity would be able to obtain on sales to external customers. Eliminations includes intersegment sales and profit eliminations. Corporate operating income includes expenses that represent unallocated costs and certain other corporate costs not considered part of management’s evaluation of reportable segment operating performance. Segment financial results were as follows: Total Net Sales (in millions) 2015 2014 2013 Integrated Defense Systems $ 6,375 $ 6,085 $ 6,489 Intelligence, Information and Services 5,733 5,889 5,970 Missile Systems 6,556 6,309 6,599 Space and Airborne Systems 5,796 6,072 6,371 Forcepoint (1) 328 104 87 Eliminations (1,480 ) (1,633 ) (1,810 ) Total business segment sales 23,308 22,826 23,706 Forcepoint Acquisition Accounting Adjustments (2) (61 ) — — Total $ 23,247 $ 22,826 $ 23,706 (1) Excludes the unfavorable impact of the acquisition accounting adjustments to record acquired deferred revenue at fair value related to Forcepoint, including historical RCP acquisitions. These amounts are included in Forcepoint Acquisition Accounting Adjustments. (2) Adjustments were less than $(1) million for 2014 and 2013 . Intersegment Sales (in millions) 2015 2014 2013 Integrated Defense Systems $ 69 $ 107 $ 107 Intelligence, Information and Services 769 827 816 Missile Systems 143 140 163 Space and Airborne Systems 484 548 711 Forcepoint 15 11 13 Total $ 1,480 $ 1,633 $ 1,810 Operating Income (in millions) 2015 2014 2013 Integrated Defense Systems $ 917 $ 974 $ 1,115 Intelligence, Information and Services 599 495 507 Missile Systems 867 800 830 Space and Airborne Systems 794 846 920 Forcepoint (1) 30 11 13 Eliminations (159 ) (166 ) (170 ) Total business segment operating income 3,048 2,960 3,215 Forcepoint Acquisition Accounting Adjustments (119 ) (6 ) (9 ) FAS/CAS Adjustment 185 286 (249 ) Corporate (101 ) (61 ) (19 ) Total $ 3,013 $ 3,179 $ 2,938 (1) Excludes the unfavorable impact of the acquisition accounting adjustments to record acquired deferred revenue at fair value of $(61) million in 2015 , and less than $(1) million in 2014 and 2013 , and amortization of acquired intangible assets of $(58) million , $(6) million , and $(9) million in 2015 , 2014 and 2013 , respectively, related to Forcepoint, including historical RCP acquisitions. These amounts are included in Forcepoint Acquisition Accounting Adjustments. Intersegment Operating Income (in millions) 2015 2014 2013 Integrated Defense Systems $ 3 $ 8 $ 9 Intelligence, Information and Services 86 83 72 Missile Systems 15 14 17 Space and Airborne Systems 47 52 62 Forcepoint 8 9 10 Total $ 159 $ 166 $ 170 We must calculate our pension and PRB costs under both FAS requirements under U.S. GAAP and CAS. U.S. GAAP outlines the methodology used to determine pension expense or income for financial reporting purposes, which is not indicative of the funding requirements for pension and PRB plans that we determine by other factors. CAS prescribes the allocation to and recovery of pension and PRB costs on U.S. government contracts. The results of each segment only include pension and PRB expense as determined under CAS. The CAS requirements for pension costs and its calculation methodology differ from the FAS requirements and calculation methodology. As a result, while both FAS and CAS use long-term assumptions in their calculation methodologies, each method results in different calculated amounts of pension and PRB cost. The FAS/CAS Adjustment, which is reported as a separate line in our segment results above, represents the difference between our pension and PRB expense or income under FAS in accordance with U.S. GAAP and our pension and PRB expense under CAS. The components of the FAS/CAS Adjustment were as follows: (In millions) 2015 2014 2013 FAS/CAS Pension Adjustment $ 182 $ 281 $ (253 ) FAS/CAS PRB Adjustment 3 5 4 FAS/CAS Adjustment $ 185 $ 286 $ (249 ) Capital Expenditures (in millions) 2015 2014 2013 Integrated Defense Systems $ 126 $ 99 $ 69 Intelligence, Information and Services 85 41 28 Missile Systems 62 56 55 Space and Airborne Systems 131 117 117 Forcepoint 10 — — Corporate 11 13 11 Total (1) $ 425 $ 326 $ 280 (1) Total capital expenditures may not agree to our consolidated statements of cash flows due to non-cash transactions. Depreciation and Amortization (in millions) 2015 2014 2013 Integrated Defense Systems $ 90 $ 95 $ 96 Intelligence, Information and Services 57 50 52 Missile Systems 75 76 76 Space and Airborne Systems 166 168 158 Forcepoint 8 1 1 Forcepoint Acquisition Accounting Adjustments 58 6 9 Corporate 35 43 53 Total $ 489 $ 439 $ 445 Total Assets (in millions) 2015 2014 Integrated Defense Systems $ 4,357 $ 4,128 Intelligence, Information and Services 4,155 4,032 Missile Systems 6,561 6,223 Space and Airborne Systems 6,416 6,414 Forcepoint (1) 2,486 211 Corporate 5,306 6,708 Total $ 29,281 $ 27,716 (1) Includes intangible assets of $452 million and $10 million at December 31, 2015 and December 31, 2014 , respectively. Related amortization expense is included in Forcepoint Acquisition Accounting Adjustments. Total Net Sales by Geographic Areas (in millions) 2015 2014 2013 United States $ 16,097 $ 16,285 $ 17,260 Asia/Pacific 2,429 2,390 2,590 Middle East and North Africa 3,446 2,857 2,396 All other (principally Europe) 1,275 1,294 1,460 Total $ 23,247 $ 22,826 $ 23,706 The following is a breakdown of net sales to major customers: (In millions) 2015 2014 2013 Sales to the U.S. government (1) $ 15,767 $ 16,083 $ 17,019 Sales to the U.S. Department of Defense (1) 14,876 15,059 16,015 Total international sales (2) 7,150 6,541 6,446 Foreign direct commercial sales (1) 4,336 3,579 3,384 Foreign military sales through the U.S. government 2,814 2,962 3,062 (1) Excludes foreign military sales through the U.S. government. (2) Includes foreign military sales through the U.S. government. Property, Plant and Equipment, net, by Geographic Area (in millions) 2015 2014 United States $ 1,928 $ 1,847 All other (principally Europe) 77 88 Total $ 2,005 $ 1,935

Quarterly Operating Results (Un

Quarterly Operating Results (Unaudited)	12 Months Ended
	Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]
Quarterly Financial Information [Text Block]	Quarterly Operating Results (Unaudited) (In millions, except per share amounts, stock prices and workdays) 2015 First (3) Second Third Fourth Total net sales $ 5,288 $ 5,848 $ 5,783 $ 6,328 Gross margin 1,455 1,323 1,375 1,520 Income from continuing operations 554 502 444 554 Net income attributable to Raytheon Company 551 505 447 571 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 1.79 $ 1.65 $ 1.47 $ 1.85 Diluted 1.78 1.65 1.47 1.85 EPS attributable to Raytheon Company common stockholders (1) Basic 1.79 1.65 1.47 1.89 Diluted 1.79 1.65 1.47 1.89 Cash dividends per share Declared 0.670 0.670 0.670 0.670 Paid 0.605 0.670 0.670 0.670 Common stock prices High 112.40 110.99 110.33 127.95 Low 100.05 97.79 95.57 105.69 Workdays (2) 61 64 63 61 2014 First (4) Second Third Fourth Total net sales $ 5,508 $ 5,701 $ 5,474 $ 6,143 Gross margin 1,347 1,400 1,303 1,481 Income from continuing operations 593 501 519 580 Net income attributable to Raytheon Company 596 551 515 582 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 1.87 $ 1.59 $ 1.66 $ 1.86 Diluted 1.87 1.59 1.65 1.86 EPS attributable to Raytheon Company common stockholders (1) Basic 1.89 1.76 1.66 1.88 Diluted 1.89 1.76 1.65 1.88 Cash dividends per share Declared 0.605 0.605 0.605 0.605 Paid 0.550 0.605 0.605 0.605 Common stock prices High 101.31 101.47 103.35 110.47 Low 88.13 94.08 89.43 93.85 Workdays (2) 62 64 63 60 (1) EPS is computed independently for each of the quarters presented; therefore, the sum of the quarterly earnings per share may not equal the total computed for each year. (2) Number of workdays per our fiscal calendar, which excludes holidays and weekends. (3) In March 2015, RSL recorded a settlement with the UK Home Office concluding the parties' dispute regarding the UK Home Office's July 2010 termination of RSL's eBorders contract within our IIS segment. After certain expenses and derecognition of outstanding receivables, IIS recorded $181 million in operating income through a reduction in cost of sales in the first quarter of 2015. (4) In January 2014, a foreign subsidiary authorized and completed a transaction which resulted in a taxable dividend of approximately $115 million and generated a net tax benefit of approximately $80 million , which is reflected in our first quarter of 2014 results.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Consolidation and Classification [Policy Text Block]	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. 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 [Policy Text Block]	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 Recognition [Policy Text Block]	Revenue Recognition — We 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 toward 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 U.S. GAAP. We combine closely related contracts when all the applicable criteria under U.S. 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 U.S. 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 a method to measure progress toward 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 toward completion of the contract. Under the cost-to-cost measure of progress, the extent of progress toward 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 companywide 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 toward 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 in 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 in 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) 2015 2014 2013 Operating income $ 371 $ 513 $ 557 Income from continuing operations attributable to Raytheon Company 241 333 362 Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company $ 0.79 $ 1.07 $ 1.12 We apply the separation guidance under U.S. 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. We recognize revenue for each deliverable based on the revenue recognition policies described herein. 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. We also sell software via subscriptions and hosted solutions and revenue for these arrangements is recognized straight-line over the term of the agreement. A portion of our revenues are generated from the sale of appliances that contain software components, such as operating systems, that operate together with the hardware platform to provide the essential functionality of the appliance. When sold in a multiple element arrangement, these appliances are considered non-software deliverables and therefore, we can allocate the arrangement fee based upon relative selling price of each element. When applying the relative selling price method, we determine the selling price of each element using best estimate of selling price (BESP), because VSOE and third-party evidence (TPE) are not available. The revenues allocated to the software-related elements are recognized based on software industry specific revenue recognition guidance, as noted above. The revenues allocated to the non-software related elements are recognized based on the nature of the element provided. We estimate BESP by considering internal factors such as historical pricing practices and gross margin objectives, as well as market conditions such as competitor pricing strategies, customer demands and geography, and regularly review these assumptions. To a much lesser extent, we enter into other types of contracts such as service, commercial, 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. 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.
Research and Development Expenses [Policy Text Block]	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 $706 million , $500 million and $465 million in 2015 , 2014 and 2013 , 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 [Policy Text Block]	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. With the exception of Forcepoint, 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. Payments made for state income taxes related to Forcepoint are included in federal and foreign income tax expense.
Other Expense (Income), Net [Policy Text Block]	Other Expense (Income), Net —Other expense (income), net, consists primarily of gains and losses from our investments held in 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 [Policy Text Block]	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 [Policy Text Block]	Short-term Investments — We invest in marketable securities in accordance with our short-term investment policy and cash management strategy. These marketable securities are classified as available-for-sale and are recorded at fair value as short-term investments in our consolidated balance sheets. These investments are deemed Level 2 assets under the fair value hierarchy at December 31, 2015 and December 31, 2014 , 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. At December 31, 2015 and December 31, 2014 , we had short-term investments of $872 million and $1,497 million , respectively, 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 and P-1 . As of December 31, 2015 , our short-term investments had an average maturity of approximately five months. The amortized cost of these securities closely approximated their fair value at December 31, 2015 and December 31, 2014 . There were no securities deemed to have other than temporary declines in value for 2015 . In 2015 , we recorded unrealized gains on short-term investments of less than $1 million , net of tax, in accumulated other comprehensive loss (AOCL). In 2014 , we recorded unrealized losses on short-term investments of less than $1 million , net of tax, in AOCL. In 2015 , we recorded sales of short-term investments of $209 million , which resulted in gains of less than $1 million recorded in other (income) expense, net. In 2014 , we recorded sales of short-term investments of $882 million , which resulted in gains of less than $1 million recorded in other (income) expense, net. For purposes of computing realized gains and losses on available-for-sale securities, we determine cost on a specific identification basis.
Contracts in Process, Net [Policy Text Block]	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 [Policy Text Block]	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 U.S. 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, 2015 and December 31, 2014 , net deferred contract costs were approximately $241 million and $223 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 (PRB) 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 PRB costs differ from the Financial Accounting Standards (FAS) requirements under U.S. 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 PRB plans in 2013 – 2015 . This resulted in $185 million of income , $286 million of income and $249 million of expense in 2015 , 2014 and 2013 , respectively, reflected in our consolidated results of operations for the difference between CAS and FAS requirements for our pension and PRB plans in those years.
Inventories [Policy Text Block]	Inventories —Inventories are stated at the lower of its cost (first-in, first-out or average cost) or 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) 2015 2014 Materials and purchased parts $ 69 $ 70 Work in process 551 326 Finished goods 15 18 Total $ 635 $ 414 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 $225 million and $126 million in inventories as work in process at December 31, 2015 and December 31, 2014 .
Property, Plant and Equipment, Net [Policy Text Block]	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 operating 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 [Policy Text Block]	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 U.S. GAAP. In performing our annual impairment test in the fourth quarters of 2015 , 2014 and 2013 we did not identify any goodwill 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 [Policy Text Block]	Computer Software, Net —Internal use computer software, net, included in other assets, net, which consists primarily of our enterprisewide 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 . Computer software development costs related to software products developed for external use are capitalized, when significant, after establishment of technological feasibility and marketability. There have been no such costs capitalized to date as the costs incurred during the period between technological feasibility to general release have not been significant.
Advance Payments and Billings in Excess of Costs Incurred [Policy Text Block]	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.
Deferred Revenue [Policy Text Block]	Deferred Revenue —We receive up-front payments related to software license sales for Forcepoint, which we recognize ratably over the license term. We classify deferred revenue as current and noncurrent based on the timing of when we expect to recognize revenue. The current and noncurrent portions of Forcepoint's deferred revenue are included in other accrued expenses and accrued retiree benefits and other long-term liabilities, respectively, in our consolidated balance sheets.
Redeemable Noncontrolling interest [Policy Text Block]	Redeemable Noncontrolling Interest —Redeemable noncontrolling interest is recognized at the greater of the estimated redemption value as of the balance sheet date or the initial value adjusted for the noncontrolling interest holder's share of the cumulative impact of net income (loss) and other changes in accumulated other comprehensive income (loss). Adjustments to the redemption value over the period from the date of acquisition to the date the redemption feature becomes puttable are immediately recorded to retained earnings. We reflect the redemption value adjustments in the EPS calculation if redemption value is in excess of the fair value of noncontrolling interest.
Other Comprehensive Income (Loss) [Policy Text Block]	Other Comprehensive Income (Loss) —Other comprehensive income (loss) includes foreign exchange translation adjustments, effective portion of gains and losses on derivative instruments qualified as cash flow hedges, unrealized gains (losses) on available-for-sale investments, and gains and losses associated with pension and PRB. 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, 2015 , 2014 and 2013 : Foreign exchange translation Cash flow hedges and interest rate locks Unrealized gains (losses) on investments and other, net Pension and postretirement benefit plans, net Total (In millions) 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 ) Before tax amount (50 ) (10 ) 1 (3,514 ) (3,573 ) Tax (expense) benefit — 4 (1 ) 1,225 1,228 Net of tax amount (50 ) (6 ) — (2,289 ) (2,345 ) Balance at December 31, 2014 (3 ) (14 ) (9 ) (7,432 ) (7,458 ) Before tax amount (57 ) (4 ) (5 ) 525 459 Tax (expense) benefit — 2 2 (181 ) (177 ) Net of tax amount (57 ) (2 ) (3 ) 344 282 Balance at December 31, 2015 $ (60 ) $ (16 ) $ (12 ) $ (7,088 ) $ (7,176 ) Material amounts reclassified out of AOCL were related to amortization of net actuarial loss associated with our pension and PRB plans and were $1,129 million , $892 million and $1,154 million before tax in 2015 , 2014 and 2013 , respectively. This component of AOCL is included in the calculation of net periodic pension expense (income) (see "Note 14: Pension and Other Employee Benefits" for additional details). The defined benefit pension and other employee benefit plans are shown net of tax benefits of $3,824 million and $4,005 million at December 31, 2015 and December 31, 2014 , respectively. The cash flow hedges and interest rate locks are shown net of tax benefits of $10 million and $8 million at December 31, 2015 and December 31, 2014 , respectively. The unrealized gains (losses) on investments and other are shown net of tax benefits of $4 million and $2 million at December 31, 2015 and December 31, 2014 , respectively. We expect approximately $5 million of after-tax net unrealized losses on our cash flow hedges at December 31, 2015 to be reclassified into earnings at then-current values over the next twelve months as the underlying hedged transactions occur.
Translation of Foreign Currencies [Policy Text Block]	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 2015 , 2014 and 2013 were not material.
Treasury Stock [Policy Text Block]	Treasury Stock —Repurchased shares are 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.
Pension and Other Postretirement Benefits Costs [Policy Text Block]	Pension and Other Postretirement Benefits (PRB) 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 U.S. GAAP, and the calculations and assumptions utilized require judgment. U.S. GAAP outlines the methodology used to determine pension expense or income for financial reporting purposes. For purposes of determining pension expense under U.S. 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 U.S. 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% 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 [Policy Text Block]	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. We execute these instruments with financial institutions that we judge to be credit-worthy, and the majority of our foreign currency forward contracts are denominated in currencies of major industrial countries. We do not hold or issue derivative financial instruments for trading or speculative purposes. 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 classify the cash flows from these instruments in the same category as the cash flows from the hedged items. The aggregate notional amount of the outstanding foreign currency forward contracts was $1,076 million and $926 million at December 31, 2015 and December 31, 2014 , respectively. The net notional exposure of these contracts was approximately $117 million and $57 million at December 31, 2015 and December 31, 2014 , respectively. The foreign currency forward contracts at December 31, 2015 have maturities at various dates through 2028 as follows: $695 million in 2016 ; $263 million in 2017 ; $70 million in 2018 ; and $48 million thereafter. We recognize all derivative financial instruments as either assets or liabilities at fair value in our consolidated balance sheets. The fair value of asset derivatives included in other assets, net and liability derivatives included in other current liabilities in our consolidated balance sheets related to foreign currency contracts were $9 million and $29 million , respectively at December 31, 2015 and $7 million and $24 million , respectively at December 31, 2014. The fair values of these derivatives are Level 2 in the fair value hierarchy for 2015 and 2014 because they are determined based on a market approach utilizing externally quoted forward rates for similar contracts. We measure and record the impact of counterparty credit risk into our valuation and the impact was less than $1 million for the years ended December 31, 2015 and 2014 . 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. 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 may also 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, 2015 and 2014 .
Fair Values [Policy Text Block]	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, 2015 and 2014 . Fair value information for those assets and liabilities, including their classification in the fair value hierarchy, is included in "Note 14: Pension and Other Employee Benefits" (for marketable securities held in trust) and "Note 1: Summary of Significant Accounting Policies" (for short-term investments and foreign currency forward contracts). Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. 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, 2015 and 2014 . We did not have any material amounts of Level 3 assets or liabilities at December 31, 2015 and 2014 .
Earnings per Share (EPS) [Policy Text Block]	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 stock-based payment awards, and separately disclose distributed and undistributed earnings. Distributed earnings represent common stock dividends and dividends earned on unvested stock-based payment awards of retirement eligible employees. Undistributed earnings represent earnings that were available for distribution but were not distributed. Common stock and unvested stock-based payment awards earn dividends equally.
Employee Stock Plans [Policy Text Block]	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 (RSUs) and the straight-line amortization method for our LTPP. The expense related to our Forcepoint long-term incentive plans is recognized over the requisite service period when achievement of the performance conditions is considered probable. 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 [Policy Text Block]	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 68% , 70% , and 72% of total net sales in 2015 , 2014 and 2013 , respectively. Total sales to customers outside the U.S., including foreign military sales through the U.S. government, were 31% , 29% and 27% of total net sales in 2015 , 2014 and 2013 , 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.
Accounting Standards [Policy Text Block]	Accounting Standards— In November 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes, which requires all deferred income tax assets and liabilities to be classified as noncurrent on the balance sheet. The new standard is effective for annual reporting periods beginning after December 15, 2016 with early adoption permitted. We have elected to early adopt this requirement retrospectively in the current period. We reclassified $165 million of net current deferred income tax liabilities from current to noncurrent at December 31, 2014. In May 2015, the FASB issued ASU 2015-07, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent), which, for all investments for which fair value is measured using the net asset value per share practical expedient, removes the requirement to make certain disclosures and to categorize them within the fair value hierarchy. The new standard is effective for annual reporting periods beginning after December 15, 2016 with early adoption permitted. We have elected to early adopt this requirement retrospectively in the current period. In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs , which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability. The new standard is effective for annual reporting periods beginning after December 15, 2015 and interim periods within those fiscal years, with early adoption permitted. We have elected to early adopt this requirement retrospectively in the current period. We reclassified $5 million of debt issuance costs from other assets, net, to a reduction of long-term debt at December 31, 2014. In May 2014, the FASB issued ASU 2014-09 Revenue from Contracts with Customers (Topic 606) which will replace numerous requirements in U.S. GAAP, including industry-specific requirements, and provide companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. Under the new standard, we expect to continue using the cost-to-cost percentage of completion method to recognize revenue for most of our long-term contracts. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. We have not yet selected a transition method. We are currently evaluating the potential changes from this ASU to our future financial reporting and disclosures. On July 9, 2015, the FASB approved the deferral of the new standard's effective date by one year. The new standard now would be effective for annual reporting periods beginning after December 15, 2017. The FASB will permit companies to adopt the new standard early, but not before the original effective date of annual reporting periods beginning after December 15, 2016 . Other new pronouncements issued but not effective until after December 31, 2015 are not expected to have a material impact on our financial position, results of operations or liquidity.

Summary of Significant Accoun26

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Net EAC adjustments	Net EAC adjustments had the following impact on our operating results: (In millions, except per share amounts) 2015 2014 2013 Operating income $ 371 $ 513 $ 557 Income from continuing operations attributable to Raytheon Company 241 333 362 Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company $ 0.79 $ 1.07 $ 1.12
Schedule of Inventory	Inventories consisted of the following at December 31: (In millions) 2015 2014 Materials and purchased parts $ 69 $ 70 Work in process 551 326 Finished goods 15 18 Total $ 635 $ 414
Schedule Of Property Plant And Equipment Estimated Useful Life Of Asset	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
Schedule of Comprehensive Income (Loss)	Other comprehensive income (loss) consisted of the following activity during the years ended December 31, 2015 , 2014 and 2013 : Foreign exchange translation Cash flow hedges and interest rate locks Unrealized gains (losses) on investments and other, net Pension and postretirement benefit plans, net Total (In millions) 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 ) Before tax amount (50 ) (10 ) 1 (3,514 ) (3,573 ) Tax (expense) benefit — 4 (1 ) 1,225 1,228 Net of tax amount (50 ) (6 ) — (2,289 ) (2,345 ) Balance at December 31, 2014 (3 ) (14 ) (9 ) (7,432 ) (7,458 ) Before tax amount (57 ) (4 ) (5 ) 525 459 Tax (expense) benefit — 2 2 (181 ) (177 ) Net of tax amount (57 ) (2 ) (3 ) 344 282 Balance at December 31, 2015 $ (60 ) $ (16 ) $ (12 ) $ (7,088 ) $ (7,176 )

Earnings Per Share (EPS) (Table

Earnings Per Share (EPS) (Tables)	12 Months Ended
	Dec. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	EPS from continuing operations attributable to Raytheon Company common stockholders and unvested stock-based payment awards was as follows: 2015 2014 2013 Basic EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 2.67 $ 2.39 $ 2.19 Undistributed earnings 4.09 4.59 3.78 Total $ 6.76 $ 6.98 $ 5.97 Diluted EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 2.67 $ 2.39 $ 2.18 Undistributed earnings 4.08 4.58 3.78 Total $ 6.75 $ 6.97 $ 5.96
Income Attributable to Participating Securities	Income attributable to participating securities was as follows: (In millions) 2015 2014 2013 Income from continuing operations attributable to participating securities $ 32 $ 39 $ 38 Income (loss) from discontinued operations, net of tax attributable to participating securities (1) — 1 1 Net income attributable to participating securities $ 32 $ 40 $ 39 (1) Income (loss) from discontinued operations, net of tax attributable to participating securities, was earnings of less than $1 million for 2015 .
Weighted-Average Shares Outstanding for Basic and Diluted EPS	The weighted-average shares outstanding for basic and diluted EPS were as follows: (In millions) 2015 2014 2013 Shares for basic EPS (1) 304.8 312.0 323.4 Dilutive effect of stock options and LTPP (2) 0.4 0.6 0.8 Shares for diluted EPS 305.2 312.6 324.2 (1) Includes participating securities of 4.7 million , 5.5 million and 6.4 million for 2015 , 2014 and 2013 , respectively. (2) Includes stock options outstanding of less than 1 million in 2014 and 2013 . There were no stock options outstanding at December 31, 2015 .

Acquisitions and Goodwill (Tabl

Acquisitions and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2015
Business Acquisition [Line Items]
Rollforward of Goodwill by Segment	A rollforward of goodwill by segment was as follows: (In millions) Integrated Defense Systems Intelligence, Information and Services (1) Missile Systems Space and Airborne Systems Forcepoint (1) Total Balance at December 31, 2013 $ 1,800 $ 2,523 $ 4,150 $ 4,106 $ 185 $ 12,764 Acquisitions — 301 — — — 301 Effect of foreign exchange rates and other (3 ) (1 ) — — — (4 ) Balance at December 31, 2014 1,797 2,823 4,150 4,106 185 13,061 Acquisitions (2) — 48 4 — 1,624 1,676 Effect of foreign exchange rates and other (3 ) (3 ) — — — (6 ) Balance at December 31, 2015 $ 1,794 $ 2,868 $ 4,154 $ 4,106 $ 1,809 $ 14,731 (1) In connection with the reclassification of Raytheon Cyber Products (RCP) from our IIS segment, goodwill of $185 million was allocated to the Forcepoint segment on a relative fair value basis. (2) In addition to the acquisitions of Websense and Foreground Security, we acquired Sensintel, Inc. at Missile Systems (MS) and finalized the purchase price allocation for RBT at IIS in 2015 .
Websense, Inc. [Member]
Business Acquisition [Line Items]
Purchase price allocation	The final purchase price allocation, net of cash received, for the Websense acquisition was as follows: (In millions) Purchase Price Allocation Accounts receivable (at contractually stated amounts) $ 38 Other current assets 21 Property, plant and equipment 19 Goodwill 1,624 Intangible assets 501 Other non-current assets 16 Deferred revenue (225 ) Current liabilities (51 ) Long-term liabilities (52 ) Fair value of net assets acquired $ 1,891
Schedule of Finite-Lived Intangible Assets Acquired and Weighted Average Useful Life	The following are the identifiable intangible assets acquired and the respective estimated periods over which such assets will be amortized: (In millions, except years) Gross Carrying Amount Weighted-average Useful Life (in Years) Completed technology $ 439 7 Customer relationships 43 13 Trademarks and other 19 10 Fair value of intangible assets acquired $ 501

Forcepoint Joint Venture Forcep

Forcepoint Joint Venture Forcepoint Joint Venture (Tables)	12 Months Ended
	Dec. 31, 2015
Forcepoint
Redeemable Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest [Table Text Block]	A rollforward of redeemable noncontrolling interest was as follows: (In millions) 2015 2014 2013 Beginning balance $ — $ — $ — Sale of noncontrolling interest in Forcepoint 343 — — Net income (loss) (17 ) — — Other comprehensive income (loss), net of tax (1) — — — Adjustment of noncontrolling interest to redemption value 29 — — Ending balance $ 355 $ — $ — (1) Other comprehensive income (loss), net of tax, was a loss of less than $1 million in 2015 .

Contracts in Process, Net (Tabl

Contracts in Process, Net (Tables)	12 Months Ended
	Dec. 31, 2015
Contract in Process Net [Abstract]
Schedule of Contracts in Progress, Net	Contracts in process, net, consisted of the following at December 31: Cost-Type Fixed-Price Total (In millions) 2015 2014 2015 2014 2015 2014 U.S. government contracts (including foreign military sales): Billed $ 432 $ 409 $ 196 $ 226 $ 628 $ 635 Unbilled 867 810 8,381 8,418 9,248 9,228 Progress payments — — (5,752 ) (5,834 ) (5,752 ) (5,834 ) 1,299 1,219 2,825 2,810 4,124 4,029 Other customers: Billed 22 14 524 393 546 407 Unbilled 21 27 1,317 1,127 1,338 1,154 Progress payments — — (439 ) (601 ) (439 ) (601 ) 43 41 1,402 919 1,445 960 Allowance for doubtful accounts — — (5 ) (4 ) (5 ) (4 ) Total contracts in process, net $ 1,342 $ 1,260 $ 4,222 $ 3,725 $ 5,564 $ 4,985

Property, Plant and Equipment31

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule Of Property Plant And Equipment Net [Text Block]	Property, plant and equipment, net, consisted of the following at December 31: (In millions) 2015 2014 Land $ 86 $ 103 Buildings and improvements 2,530 2,607 Machinery and equipment 3,917 3,716 Property, plant and equipment, gross 6,533 6,426 Accumulated depreciation and amortization (4,528 ) (4,491 ) Total $ 2,005 $ 1,935

Other Assets, Net (Tables)

Other Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Assets Net	Other assets, net, consisted of the following at December 31: (In millions) 2015 2014 Marketable securities held in trust (1) $ 525 $ 519 Computer software, net of accumulated amortization of $1,059 and $992 at December 31, 2015 and 2014, respectively 294 313 Other intangible assets, net of accumulated amortization of $402 and $293 at December 31, 2015 and 2014, respectively 700 303 Other noncurrent assets, net 308 241 Deferred tax asset (2) 906 1,065 Total $ 2,733 $ 2,441 (1) For further details, refer to "Note 14: Pension and Other Employee Benefits". (2) For further details, refer to "Note 15: Income Taxes".
Schedule of Investments Included in Other Assets Net	Investments, which are included in other noncurrent assets, net, above consisted of the following at December 31: (In millions, except percentages) Ownership % 2015 2014 Equity method investments Thales-Raytheon Systems Co. Ltd. (TRS) 50 $ 99 $ 98 Range Generation Next (RGNext) 50 11 — Other investments Various 19 11 Total $ 129 $ 109

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consisted of the following at December 31: (In millions, except percentages) 2015 2014 $251 notes due 2018, 6.75% $ 251 $ 251 $340 notes due 2018, 6.40% 339 339 $500 notes due 2020, 4.40% 498 497 $1,000 notes due 2020, 3.125% 993 992 $1,100 notes due 2022, 2.50% 1,093 1,092 $300 notes due 2024, 3.15% 297 296 $382 notes due 2027, 7.20% 370 369 $185 notes due 2028, 7.00% 184 184 $600 notes due 2040, 4.875% 591 591 $425 notes due 2041, 4.70% 419 419 $300 notes due 2044, 4.20% 295 295 Total debt issued and outstanding (1) $ 5,330 $ 5,325 (1) Total long-term debt amounts at December 31, 2014 are adjusted to reflect the reclassification of debt issuance costs of $5 million in accordance with ASU 2015-03. See "Note 1: Summary of Significant Accounting Policies" for additional information.
Fair Value of long term debt	The estimated fair value of long-term debt was the following at December 31: (In millions) 2015 2014 Fair value of long-term debt $ 5,826 $ 5,936
Schedule of Long-term Debt Instruments	The adjustments to the principal amounts of long-term debt were as follows at December 31: (In millions) 2015 2014 Principal $ 5,383 $ 5,383 Unamortized issue discounts (43 ) (48 ) Unamortized interest rate lock costs (10 ) (10 ) Total $ 5,330 $ 5,325 The aggregate amounts of principal payments due on long-term debt for the next five years are: (In millions) 2016 $ — 2017 — 2018 591 2019 — 2020 1,500 Thereafter 3,292

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Loss Contingencies [Line Items]
Schedule of Annual Rentals on a Lease Basis	At December 31, 2015 , we had commitments under long-term leases requiring annual rentals on a net lease basis as follows: (In millions) 2016 $ 220 2017 190 2018 162 2019 124 2020 102 Thereafter 352
Estimates of Total Remediation Costs, Weighted Average Risk-Free Rate, Total Remediation Costs - Discounted and Recoverable Portion	Our estimates regarding remediation costs to be incurred were as follows at December 31: (In millions, except percentages) 2015 2014 Total remediation costs—undiscounted $ 224 $ 202 Weighted-average discount rate 5.2 % 5.5 % Total remediation costs—discounted $ 149 $ 131 Recoverable portion 94 80
Stated Values Outstanding, Guarantees, Letters of credit and Surety bonds	The stated values outstanding consisted of the following at December 31: (In millions) 2015 2014 Guarantees $ 213 $ 266 Letters of credit 2,242 1,938 Surety bonds 264 298
Activity Related to Product Warranty Accruals	Activity related to product warranty accruals was as follows: (In millions) 2015 2014 2013 Beginning balance $ 32 $ 30 $ 33 Provisions for warranties 1 9 3 Warranty services provided (9 ) (7 ) (6 ) Ending balance $ 24 $ 32 $ 30
Environmental Remediation Costs [Member]
Loss Contingencies [Line Items]
Schedule of Environmental Remediation Costs	Environmental remediation costs expected to be incurred are: (In millions) 2016 $ 32 2017 24 2018 20 2019 16 2020 11 Thereafter 121

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Schedule Of Changes In Shares Of Common Stock Outstanding	The changes in shares of our common stock outstanding were as follows: (In millions) 2015 2014 2013 Beginning balance 307.3 314.5 328.1 Stock plans activity 1.6 1.4 2.4 Share repurchases (9.9 ) (8.6 ) (16.0 ) Ending balance 299.0 307.3 314.5
Repurchases of Common Stock	Our share repurchases were as follows: (In millions) 2015 2014 2013 $ Shares $ Shares $ Shares Shares repurchased under our share repurchase programs $ 1,000 9.0 $ 750 7.7 $ 1,075 15.2 Shares repurchased to satisfy tax withholding obligations 99 0.9 90 0.9 48 0.8 Total share repurchases $ 1,099 9.9 $ 840 8.6 $ 1,123 16.0

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Stock-based compensation	Stock-based compensation expense and the associated tax benefit recognized were as follows: (In millions) 2015 2014 2013 Stock-based compensation expense Restricted stock expense $ 92 $ 81 $ 82 RSU expense 26 28 3 LTPP expense 22 39 44 Total stock-based compensation expense $ 140 $ 148 $ 129 Stock-based tax benefit recognized 44 48 39
Restricted Stock Activity Disclosure	Restricted stock and RSU activity was as follows: Shares/units (in thousands) Weighted-Average Grant Date Fair Value Outstanding at December 31, 2012 5,838 $ 49.98 Granted 1,855 67.46 Vested (1,708 ) 48.93 Forfeited (648 ) 52.39 Outstanding at December 31, 2013 5,337 56.10 Granted 1,355 96.84 Vested (1,648 ) 51.30 Forfeited (526 ) 58.74 Outstanding at December 31, 2014 4,518 69.76 Granted 1,242 110.28 Vested (1,597 ) 57.65 Forfeited (423 ) 77.02 Outstanding at December 31, 2015 3,740 $ 87.57 The total fair value of restricted stock and RSUs vested and the related tax benefit realized were as follows: (In millions) 2015 2014 2013 Fair value of restricted stock and RSUs vested $ 167 $ 161 $ 116 Tax benefit realized related to vested shares/units 58 56 41
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Assumptions Used [Table Text Block]	The assumptions used in the Monte Carlo model for the TSR portion of the awards granted during each year were as follows: 2015 2014 2013 Expected stock price volatility 16.90 % 18.93 % 20.16 % Peer group stock price volatility 19.37 % 23.19 % 25.42 % Correlations of returns 59.51 % 68.01 % 70.53 % Risk free interest rate 0.89 % 0.87 % 0.38 %
Long-Term Performance Plan Activity	LTPP activity related to the expected units was as follows (1) : Units (in thousands) Weighted-Average Grant Date Fair Value Outstanding at December 31, 2012 1,420 $ 52.57 Granted 402 61.38 Increase due to expected performance 398 53.86 Vested (383 ) 55.74 Forfeited (10 ) 51.22 Outstanding at December 31, 2013 1,827 54.13 Granted 280 97.59 Increase due to expected performance 99 39.50 Vested (664 ) 52.33 Forfeited (134 ) 75.80 Outstanding at December 31, 2014 1,408 60.53 Granted 189 112.14 Increase due to expected performance 148 73.70 Vested (797 ) 50.83 Forfeited (33 ) 85.16 Outstanding at December 31, 2015 915 $ 80.83 (1) This table excludes 50 thousand , 93 thousand and 114 thousand expected dividend equivalent units outstanding at December 31, 2015 , December 31, 2014 and December 31, 2013 , respectively, based on expected performance on each reporting date. The total fair value of LTPP units vested and the related tax benefit realized were as follows: (In millions) 2015 2014 2013 Fair value of LTPP units vested $ 93 $ 70 $ 23 Tax benefit realized related to vested LTPP units 33 25 8
Forcepoint
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Assumptions Used [Table Text Block]	The weighted-average assumptions used in the Black-Scholes model and the weighted-average grant date fair value for the Forcepoint awards granted in 2015 were as follows: Unit Price $ 1,000 Expected life (in years) 3.5 Expected unit price volatility 56.96 % Risk free interest rate 1.21 % Dividend yield — % Grant date fair value $ 418.13

Pension and Other Employee Be37

Pension and Other Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2015
Defined Benefit Plans and PRB Plans [Line Items]
Schedule of Fair Value of Pension Plans	The fair value of plan assets for our domestic and foreign Pension Benefits plans was as follows: (In millions) 2015 2014 Domestic Pension Benefits plan $ 18,063 $ 19,352 Foreign Pension Benefits plan 837 868
Marketable Securities	The fair value of marketable securities held in trust, which are considered Level 1 assets under the fair value hierarchy, consisted of the following at December 31: (In millions) 2015 2014 Marketable securities held in trust $ 525 $ 519
Schedule of Pension Contributions	We made the following contributions to our pension and PRB plans during the years ended December 31: (In millions) 2015 2014 2013 Required pension contributions $ 339 $ 650 $ 778 Discretionary pension contributions 200 600 300 PRB contributions 22 20 22 Total $ 561 $ 1,270 $ 1,100
Pension Benefits Expected to be Paid From Plans or Companies Assets	The table below reflects the total Pension Benefits expected to be paid from the plans or from our assets, including both our share of the benefit cost and the participants’ share of the cost, which is funded by participant contributions. PRB Benefits expected to be paid reflect our portion only. (In millions) Pension Benefits PRB Benefits 2016 $ 1,871 $ 61 2017 1,838 61 2018 1,741 61 2019 1,500 60 2020 1,509 60 Thereafter (next 5 years) 7,804 266
Amounts Recognized on the Balance Sheets	Funded Status – Amounts Recognized on our Balance Sheets Pension Benefits PRB Benefits (In millions) December 31: 2015 2014 2015 2014 Noncurrent assets $ 43 $ 28 $ — $ — Current liabilities (114 ) (98 ) (13 ) (12 ) Noncurrent liabilities (6,474 ) (6,359 ) (352 ) (352 ) Net amount recognized on our balance sheets $ (6,545 ) $ (6,429 ) $ (365 ) $ (364 ) Reconciliation of Amounts Recognized on our Balance Sheets Pension Benefits PRB Benefits (In millions) December 31: 2015 2014 2015 2014 Accumulated other comprehensive loss: Prior service (cost) credit $ (14 ) $ (18 ) $ 2 $ 4 Net loss (10,793 ) (11,325 ) (107 ) (98 ) Accumulated other comprehensive loss (10,807 ) (11,343 ) (105 ) (94 ) Accumulated contributions in excess (below) net periodic benefit or cost 4,262 4,914 (260 ) (270 ) Net amount recognized on our balance sheets $ (6,545 ) $ (6,429 ) $ (365 ) $ (364 )
Sources of Change in Accumulated Other Comprehensive Loss	Sources of Change in Accumulated Other Comprehensive Loss Pension Benefits PRB Benefits (In millions) 2015 2014 2015 2014 Prior service (cost) credit arising during period $ (1 ) $ (11 ) $ (1 ) $ — Amortization of prior service cost (credit) included in net income 7 7 (1 ) (1 ) Net change in prior service (cost) credit not recognized in net income during that period 6 (4 ) (2 ) (1 ) Actuarial gain (loss) arising during period (609 ) (4,334 ) (13 ) (76 ) Amortization of net actuarial (gain) loss included in net income 1,127 891 2 1 Loss due to curtailments/settlements 2 — 2 — Net change in actuarial gain (loss) not included in net income during the period 520 (3,443 ) (9 ) (75 ) Effect of exchange rates 10 9 — — Total change in accumulated other comprehensive loss during period $ 536 $ (3,438 ) $ (11 ) $ (76 )
Adjustment to Accumulated Other Comprehensive Loss	The amounts in accumulated other comprehensive loss at December 31, 2015 expected to be recognized as components of net periodic benefit cost in 2016 are as follows: (in millions) Pension Benefits PRB Benefits Amortization of net loss $ (979 ) $ (4 ) Amortization of prior service (cost) credit (5 ) 1 Total $ (984 ) $ (3 )
PBO and ABO Schedule	The PBO, ABO and asset values for our domestic qualified pension plans were as follows: (In millions) 2015 2014 PBO for domestic qualified pension plans $ 23,623 $ 24,767 ABO for domestic qualified pension plans 21,598 22,570 Asset values for domestic qualified pension plans 18,063 19,352
Schedule of Change In Projected Benefit Obligation	The tables below provide a reconciliation of benefit obligations, plan assets and related actuarial assumptions of our domestic and foreign Pension Benefits and PRB plans. Change in Projected Benefit Obligation Pension Benefits PRB Benefits (In millions) 2015 2014 2015 2014 Projected benefit obligation at beginning of year $ 26,649 $ 22,970 $ 782 $ 732 Service cost 537 448 7 6 Interest cost 1,047 1,128 30 35 Plan participants’ contributions 10 12 50 50 Amendments 1 12 1 — Plan curtailments/settlements (5 ) (4 ) (9 ) — Actuarial loss (gain) (943 ) 4,007 (17 ) 67 Foreign exchange loss (gain) (47 ) (42 ) — — Benefits paid (1,804 ) (1,882 ) (99 ) (108 ) Projected benefit obligation at end of year $ 25,445 $ 26,649 $ 745 $ 782
Schedule of Change In Plan Assets	Change in Plan Assets Pension Benefits PRB Benefits (In millions) 2015 2014 2015 2014 Fair value of plan assets at beginning of year $ 20,220 $ 19,628 $ 418 $ 431 Actual return (loss) on plan assets (19 ) 1,254 (2 ) 25 Company contributions 539 1,250 22 20 Plan participants’ contributions 10 12 50 50 Plan settlements (4 ) (4 ) (9 ) — Foreign exchange gain (loss) (42 ) (38 ) — — Benefits paid (1,804 ) (1,882 ) (99 ) (108 ) Fair value of plan assets at end of year $ 18,900 $ 20,220 $ 380 $ 418
Retirement Plan Assumptions	Weighted-Average Net Periodic Benefit Cost Assumptions Pension Benefits 2015 2014 2013 Discount rate 4.06 % 5.06 % 4.15 % Expected long-term rate of return on plan assets 7.91 % 8.67 % 8.67 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% Average 4.41 % 4.40 % 4.40 % Weighted-Average Net Periodic Benefit Cost Assumptions PRB Benefits 2015 2014 2013 Discount rate 4.05 % 5.01 % 4.00 % Expected long-term rate of return on plan assets 7.01 % 8.24 % 8.24 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% Average 4.50 % 4.50 % 4.50 % Health care trend rate * 4.00 % 4.00 % 4.00 % * Currently at the ultimate trend rate. Weighted-Average Year-End Benefit Obligation Assumptions Pension Benefits PRB Benefits 2015 2014 2015 2014 Discount rate 4.45 % 4.06 % 4.42 % 4.05 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% 2%–7% Average 4.40 % 4.40 % 4.50 % 4.50 % Health care trend rate * 4.00 % 4.00 % * Currently at the ultimate trend rate.
Long term returns used in ROA assumptions	The reasonable range of long-term returns that was used to validate the long-term ROA assumption for the calculation of the net periodic benefit cost for 2015 , 2014 and 2013 , are shown below. Percentile 2015 2014 2013 25 th N/A 5.53 % 5.62 % 35 th 6.37 % N/A N/A 65 th 8.37 % N/A N/A 75 th N/A 9.65 % 9.41 %
Schedule of Allocation of Plan Assets	The investment policy asset allocation ranges for the Plan, as set by the Investment Committee, for the year ended December 31, 2015 were as follows: Asset Category Global equity (combined U.S. and international equity) 40%–60% U.S. equities 25%–40% International equities 15%–25% Fixed-income securities 25%–40% Cash and cash equivalents 1%–10% Private equity and private real estate 5%–22% Other (including absolute return funds) 5%–20%
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Components of Net Periodic Benefit Cost	The tables below outline the components of net periodic benefit expense (income) and related actuarial assumptions of our domestic and foreign Pension Benefits and PRB Benefits plans. Components of Net Periodic Pension Expense (Income) Pension Benefits (In millions) 2015 2014 2013 Service cost $ 537 $ 448 $ 579 Interest cost 1,047 1,128 996 Expected return on plan assets (1,533 ) (1,580 ) (1,495 ) Amounts reflected in net funded status 51 (4 ) 80 Amortization of prior service cost included in net periodic pension expense 7 7 9 Recognized net actuarial loss 1,127 891 1,150 Loss recognized due to settlements 1 1 1 Amounts reclassified during the year 1,135 899 1,160 Net periodic pension expense (income) $ 1,186 $ 895 $ 1,240
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Components of Net Periodic Benefit Cost	Components of Net Periodic PRB Expense (Income) PRB Benefits (In millions) 2015 2014 2013 Service cost $ 7 $ 6 $ 8 Interest cost 30 35 32 Expected return on plan assets (28 ) (33 ) (32 ) Amounts reflected in net funded status 9 8 8 Amortization of prior service cost included in net periodic PRB expense (1 ) (1 ) (2 ) Recognized net actuarial loss 2 1 4 Loss recognized due to settlements 2 — — Amounts reclassified during the year 3 — 2 Net periodic PRB expense (income) $ 12 $ 8 $ 10
Domestic Pension Benefits Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Schedule of Allocation of Plan Assets	The fair value of our Plan assets by asset category and by level (as described in "Note 1: Summary of Significant Accounting Policies") at December 31, 2015 and December 31, 2014 were as follows: Fair Value Measurements at December 31, 2015 (In millions) Total Level 1 Level 2 Level 3 Not subject to leveling (7) U.S. equities (1) $ 5,341 $ 2,838 $ — $ — $ 2,503 International equities (1) 2,954 2,043 1 — 910 Fixed-income securities U.S. government and agency securities 344 258 86 — — Corporate debt securities/instruments (2) 2,671 109 2,440 — 122 Core fixed-income (3) 1,172 1,172 — — — Global multi-sector fixed-income (4) 434 434 — — — Securitized and structured credit (5) 818 — — — 818 Cash and cash equivalents (6) 877 637 1 — 239 Absolute return funds 1,406 — — — 1,406 Private equity funds 1,068 — — — 1,068 Private real estate funds 997 — — — 997 Insurance contracts 28 — — 28 — Total investments 18,110 7,491 2,528 28 8,063 Net receivables and payables (47 ) — — — (47 ) Total assets $ 18,063 $ 7,491 $ 2,528 $ 28 $ 8,016 Fair Value Measurements at December 31, 2014 (In millions) Total Level 1 Level 2 Level 3 Not subject to leveling (7) U.S. equities (1) $ 6,833 $ 3,268 $ — $ — $ 3,565 International equities (1) 2,792 1,749 — — 1,043 Fixed-income securities U.S. government and agency securities 112 104 8 — — Corporate debt securities/instruments (2) 2,813 161 2,528 — 124 Core fixed-income (3) 1,215 1,098 — — 117 Global multi-sector fixed-income (4) 456 456 — — — Securitized and structured credit (5) 1,006 — — — 1,006 Cash and cash equivalents (6) 820 558 158 — 104 Absolute return funds 1,478 — — — 1,478 Private equity funds 938 — — — 938 Private real estate funds 692 — — — 692 Insurance contracts 28 — — 28 — Total investments 19,183 7,394 2,694 28 9,067 Net receivables and payables 169 — — — 169 Total assets $ 19,352 $ 7,394 $ 2,694 $ 28 $ 9,236 (1) U.S. and International equities primarily include investments across the spectrum of large, medium and small market capitalization stocks. (2) Corporate debt securities/instruments include investment grade and non-investment grade bonds. (3) Core fixed-income securities are funds that invest primarily in intermediate-term high quality domestic bonds issued by various governmental or private sector entities. (4) Global multi-sector fixed-income investments are funds that invest globally among several sectors including governments, investment grade corporate bonds, high yield corporate bonds and emerging market bonds. (5) Securitized and structured credit include fixed-income funds and securities that pool together various cash flow producing financial assets that are structured in a way that can achieve desired targeted credit, maturity or other characteristics and are typically collateralized by residential mortgages, commercial mortgages and other assets, and other fixed income related securities. (6) Cash and cash equivalents are invested in highly liquid money market funds. Included in cash and cash equivalents is excess cash in investment manager accounts. This cash is available for immediate use and is used to fund daily operations and execute the investment policy. This amount is not considered to be part of the cash target allocation set forth in the investment policy. (7) Receivables, payables and certain investments that are valued using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amount presented for the total domestic pension benefits plan assets.
VEBA [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Schedule of Allocation of Plan Assets	The table below details assets by category for our VEBA trusts. These assets consist primarily of publicly-traded equity securities and publicly-traded fixed-income securities. % of Plan Assets at Dec 31: Asset category 2015 2014 Fixed-income securities 45 % 46 % U.S. equities 40 % 41 % International equities 10 % 10 % Cash and cash equivalents 5 % 3 % Total 100 % 100 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Taxes [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The provision for federal and foreign income taxes consisted of the following: (In millions) 2015 2014 2013 Current income tax expense Federal $ 757 $ 837 $ 723 Foreign 36 13 17 State (4 ) — — Deferred income tax expense (benefit) Federal (103 ) (73 ) 36 Foreign 45 13 32 State 2 — — Total $ 733 $ 790 $ 808
Schedule of Effective Income Tax Rate Reconciliation	The expense for income taxes differs from the U.S. statutory rate due to the following: 2015 2014 2013 Statutory tax rate 35.0 % 35.0 % 35.0 % Research and development tax credit (1.2 ) (1.1 ) (1.8 ) Tax settlements and refund claims (3.2 ) (0.5 ) (0.8 ) Domestic manufacturing deduction benefit (3.1 ) (2.7 ) (2.1 ) Foreign income tax rate differential (1.4 ) (0.6 ) — Tax benefit on foreign dividend — (2.8 ) — Other, net 0.2 (0.8 ) (1.0 ) Effective tax rate 26.3 % 26.5 % 29.3 %
Schedule of domestic and foreign income from continuing operations before taxes	(In millions) 2015 2014 2013 Domestic income from continuing operations before taxes $ 2,482 $ 2,868 $ 2,612 Foreign income from continuing operations before taxes 305 115 145
Schedule of income taxes paid	We made the following net tax payments during the years ended December 31: (In millions) 2015 2014 2013 Federal $ 1,008 $ 705 $ 628 Foreign 43 19 22 State 30 35 39
Schedule of Unrecognized Tax Benefits Roll Forward	A rollforward of our unrecognized tax benefits was as follows: (In millions) 2015 2014 2013 Unrecognized tax benefits, beginning of year $ 104 $ 118 $ 129 Additions based on current year tax positions 4 1 104 Additions based on prior year tax positions 1 10 — Reductions based on prior year tax positions (102 ) (25 ) (64 ) Settlements based on prior year tax positions — — (51 ) Unrecognized tax benefits, end of year $ 7 $ 104 $ 118
Schedule of Deferred Tax Assets and Liabilities	Deferred income taxes consisted of the following at December 31: (In millions) 2015 2014 Noncurrent deferred tax assets (liabilities) (1) Accrued employee compensation and benefits $ 322 $ 242 Other accrued expenses and reserves 133 132 Contracts in process and inventories (841 ) (539 ) Pension benefits 2,355 2,242 Other retiree benefits 109 110 Net operating loss and tax credit carryforwards 115 101 Depreciation and amortization (1,385 ) (1,337 ) Other 79 106 Deferred income taxes-noncurrent $ 887 $ 1,057 (1) Noncurrent deferred tax assets (liabilities) amounts at both December 31, 2015 and December 31, 2014 include the reclassification of current deferred tax assets and liabilities to noncurrent in accordance with ASU 2015-17. See "Note 1: Summary of Significant Accounting Policies" for additional information.

Business Segment Reporting (Tab

Business Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2015
Revenue, Major Customer [Line Items]
Segment Operating Performance	Segment financial results were as follows: Total Net Sales (in millions) 2015 2014 2013 Integrated Defense Systems $ 6,375 $ 6,085 $ 6,489 Intelligence, Information and Services 5,733 5,889 5,970 Missile Systems 6,556 6,309 6,599 Space and Airborne Systems 5,796 6,072 6,371 Forcepoint (1) 328 104 87 Eliminations (1,480 ) (1,633 ) (1,810 ) Total business segment sales 23,308 22,826 23,706 Forcepoint Acquisition Accounting Adjustments (2) (61 ) — — Total $ 23,247 $ 22,826 $ 23,706 (1) Excludes the unfavorable impact of the acquisition accounting adjustments to record acquired deferred revenue at fair value related to Forcepoint, including historical RCP acquisitions. These amounts are included in Forcepoint Acquisition Accounting Adjustments. (2) Adjustments were less than $(1) million for 2014 and 2013 . Intersegment Sales (in millions) 2015 2014 2013 Integrated Defense Systems $ 69 $ 107 $ 107 Intelligence, Information and Services 769 827 816 Missile Systems 143 140 163 Space and Airborne Systems 484 548 711 Forcepoint 15 11 13 Total $ 1,480 $ 1,633 $ 1,810 Operating Income (in millions) 2015 2014 2013 Integrated Defense Systems $ 917 $ 974 $ 1,115 Intelligence, Information and Services 599 495 507 Missile Systems 867 800 830 Space and Airborne Systems 794 846 920 Forcepoint (1) 30 11 13 Eliminations (159 ) (166 ) (170 ) Total business segment operating income 3,048 2,960 3,215 Forcepoint Acquisition Accounting Adjustments (119 ) (6 ) (9 ) FAS/CAS Adjustment 185 286 (249 ) Corporate (101 ) (61 ) (19 ) Total $ 3,013 $ 3,179 $ 2,938 (1) Excludes the unfavorable impact of the acquisition accounting adjustments to record acquired deferred revenue at fair value of $(61) million in 2015 , and less than $(1) million in 2014 and 2013 , and amortization of acquired intangible assets of $(58) million , $(6) million , and $(9) million in 2015 , 2014 and 2013 , respectively, related to Forcepoint, including historical RCP acquisitions. These amounts are included in Forcepoint Acquisition Accounting Adjustments. Intersegment Operating Income (in millions) 2015 2014 2013 Integrated Defense Systems $ 3 $ 8 $ 9 Intelligence, Information and Services 86 83 72 Missile Systems 15 14 17 Space and Airborne Systems 47 52 62 Forcepoint 8 9 10 Total $ 159 $ 166 $ 170
Components of FAS/CAS Adjustment	(In millions) 2015 2014 2013 FAS/CAS Pension Adjustment $ 182 $ 281 $ (253 ) FAS/CAS PRB Adjustment 3 5 4 FAS/CAS Adjustment $ 185 $ 286 $ (249 )
Schedules of Capital Expenditures and Depreciation and Amortization	Capital Expenditures (in millions) 2015 2014 2013 Integrated Defense Systems $ 126 $ 99 $ 69 Intelligence, Information and Services 85 41 28 Missile Systems 62 56 55 Space and Airborne Systems 131 117 117 Forcepoint 10 — — Corporate 11 13 11 Total (1) $ 425 $ 326 $ 280 (1) Total capital expenditures may not agree to our consolidated statements of cash flows due to non-cash transactions. Depreciation and Amortization (in millions) 2015 2014 2013 Integrated Defense Systems $ 90 $ 95 $ 96 Intelligence, Information and Services 57 50 52 Missile Systems 75 76 76 Space and Airborne Systems 166 168 158 Forcepoint 8 1 1 Forcepoint Acquisition Accounting Adjustments 58 6 9 Corporate 35 43 53 Total $ 489 $ 439 $ 445
Components of Identifiable Assets	Total Assets (in millions) 2015 2014 Integrated Defense Systems $ 4,357 $ 4,128 Intelligence, Information and Services 4,155 4,032 Missile Systems 6,561 6,223 Space and Airborne Systems 6,416 6,414 Forcepoint (1) 2,486 211 Corporate 5,306 6,708 Total $ 29,281 $ 27,716 (1) Includes intangible assets of $452 million and $10 million at December 31, 2015 and December 31, 2014 , respectively. Related amortization expense is included in Forcepoint Acquisition Accounting Adjustments.
Schedules of Total Net Sales and Property Plant and Equipment, net by Geographic Areas Revenue	Total Net Sales by Geographic Areas (in millions) 2015 2014 2013 United States $ 16,097 $ 16,285 $ 17,260 Asia/Pacific 2,429 2,390 2,590 Middle East and North Africa 3,446 2,857 2,396 All other (principally Europe) 1,275 1,294 1,460 Total $ 23,247 $ 22,826 $ 23,706 Property, Plant and Equipment, net, by Geographic Area (in millions) 2015 2014 United States $ 1,928 $ 1,847 All other (principally Europe) 77 88 Total $ 2,005 $ 1,935
Schedule of Revenue by Major Customers	The following is a breakdown of net sales to major customers: (In millions) 2015 2014 2013 Sales to the U.S. government (1) $ 15,767 $ 16,083 $ 17,019 Sales to the U.S. Department of Defense (1) 14,876 15,059 16,015 Total international sales (2) 7,150 6,541 6,446 Foreign direct commercial sales (1) 4,336 3,579 3,384 Foreign military sales through the U.S. government 2,814 2,962 3,062 (1) Excludes foreign military sales through the U.S. government. (2) Includes foreign military sales through the U.S. government.

Quarterly Operating Results (40

Quarterly Operating Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]
Schedule of Quarterly Financial Information	(In millions, except per share amounts, stock prices and workdays) 2015 First (3) Second Third Fourth Total net sales $ 5,288 $ 5,848 $ 5,783 $ 6,328 Gross margin 1,455 1,323 1,375 1,520 Income from continuing operations 554 502 444 554 Net income attributable to Raytheon Company 551 505 447 571 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 1.79 $ 1.65 $ 1.47 $ 1.85 Diluted 1.78 1.65 1.47 1.85 EPS attributable to Raytheon Company common stockholders (1) Basic 1.79 1.65 1.47 1.89 Diluted 1.79 1.65 1.47 1.89 Cash dividends per share Declared 0.670 0.670 0.670 0.670 Paid 0.605 0.670 0.670 0.670 Common stock prices High 112.40 110.99 110.33 127.95 Low 100.05 97.79 95.57 105.69 Workdays (2) 61 64 63 61 2014 First (4) Second Third Fourth Total net sales $ 5,508 $ 5,701 $ 5,474 $ 6,143 Gross margin 1,347 1,400 1,303 1,481 Income from continuing operations 593 501 519 580 Net income attributable to Raytheon Company 596 551 515 582 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 1.87 $ 1.59 $ 1.66 $ 1.86 Diluted 1.87 1.59 1.65 1.86 EPS attributable to Raytheon Company common stockholders (1) Basic 1.89 1.76 1.66 1.88 Diluted 1.89 1.76 1.65 1.88 Cash dividends per share Declared 0.605 0.605 0.605 0.605 Paid 0.550 0.605 0.605 0.605 Common stock prices High 101.31 101.47 103.35 110.47 Low 88.13 94.08 89.43 93.85 Workdays (2) 62 64 63 60 (1) EPS is computed independently for each of the quarters presented; therefore, the sum of the quarterly earnings per share may not equal the total computed for each year. (2) Number of workdays per our fiscal calendar, which excludes holidays and weekends. (3) In March 2015, RSL recorded a settlement with the UK Home Office concluding the parties' dispute regarding the UK Home Office's July 2010 termination of RSL's eBorders contract within our IIS segment. After certain expenses and derecognition of outstanding receivables, IIS recorded $181 million in operating income through a reduction in cost of sales in the first quarter of 2015. (4) In January 2014, a foreign subsidiary authorized and completed a transaction which resulted in a taxable dividend of approximately $115 million and generated a net tax benefit of approximately $80 million , which is reflected in our first quarter of 2014 results.

Summary of Significant Accoun41

Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015USD ($)Swap	Dec. 31, 2014USD ($)Swap	Dec. 31, 2013USD ($)
Significant Accounting Policies [Line Items]
Research and Development Expense	$ 706,000,000	$ 500,000,000	$ 465,000,000
Cash And Cash Equivalent Maturities Date	P90D
Short-term investments	$ 872,000,000	1,497,000,000
Average maturity of short-term investments	P5M
Securities deemed to have other than temporary declines in value	$ 0
Sales of short-term investments	209,000,000	882,000,000	325,000,000
Net deferred contract costs	241,000,000	223,000,000
Operating income	3,013,000,000	3,179,000,000	2,938,000,000
Capitalized precontract and other deferred costs, work in process inventories	225,000,000	126,000,000
Amortization of net actuarial loss included in net income	1,129,000,000	892,000,000	1,154,000,000
Defined benefit pension and other post employee benefit plans tax benefits	3,824,000,000	4,005,000,000
Cash flow hedges and interest rate locks tax benefit	10,000,000	8,000,000
Unrealized gains (loss) on investments and other tax benefit	4,000,000	2,000,000
Cash Flow Hedge Loss to be Reclassified within Twelve Months	$ 5,000,000
Number of years pension and PRB gain and losses spread	3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Unrealized Gain (Loss) on Short-term Investments	$ 1,000,000	(1,000,000)
Realized Gain (Loss) on sales of short-term investments	1,000,000	1,000,000
Foreign currency forward contracts, off-set or netting provisions, fair value of counterparty default exposure	$ 1,000,000	1,000,000
Software [Member]
Significant Accounting Policies [Line Items]
Computer Software, net, estimated useful lives, in years	10 years
FAS CAS Adjustment [Member]
Significant Accounting Policies [Line Items]
Operating income	$ 185,000,000	$ 286,000,000	$ (249,000,000)
Sales Revenue, Goods, Net [Member] | US Government Contacts Excluding FMS Sales [Member]
Significant Accounting Policies [Line Items]
Sales breakout	68.00%	70.00%	72.00%
Sales Revenue, Goods, Net [Member] | International Sales, including Foreign Military Sales [Member]
Significant Accounting Policies [Line Items]
Sales breakout	31.00%	29.00%	27.00%
Foreign Exchange Forward [Member]
Significant Accounting Policies [Line Items]
Derivative, Notional Amount	$ 1,076,000,000	$ 926,000,000
Foreign Currency Forward Contracts Net Exposure	117,000,000	$ 57,000,000
Foreign currency forward contracts maturing in next 12 months	695,000,000
Foreign currency forward contracts maturing in next two years	263,000,000
Foreign currency forward contracts maturing in next three years	70,000,000
Foreign currency forward contracts maturing in the next four years and thereafter	$ 48,000,000
Interest Rate Swap [Member]
Significant Accounting Policies [Line Items]
Interest rate swaps outstanding | Swap	0	0
Foreign Exchange Forward [Member]
Significant Accounting Policies [Line Items]
Derivative Asset	$ 9,000,000	$ 7,000,000
Derivative Liability	29,000,000	24,000,000
Fair Value, Inputs, Level 2 [Member]
Significant Accounting Policies [Line Items]
Short-term investments	$ 872,000,000	1,497,000,000
Other Current Liabilities [Member]
Significant Accounting Policies [Line Items]
Reclassification due to new accounting pronouncement		165,000,000
Other Assets [Member]
Significant Accounting Policies [Line Items]
Reclassification due to new accounting pronouncement		$ 5,000,000

Summary of Significant Accoun42

Summary of Significant Accounting Policies (Net EAC adjustments) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net EAC adjustments [Line Items]
Operating income									$ 3,013	$ 3,179	$ 2,938
Income from continuing operations attributable to Raytheon Company	$ 554	$ 444	$ 502	$ 554	$ 580	$ 519	$ 501	$ 593	$ 2,061	$ 2,179	$ 1,932
Diluted EPS from continuing operations attributable to Raytheon Company common stockholders	$ 1.85	$ 1.47	$ 1.65	$ 1.78	$ 1.86	$ 1.65	$ 1.59	$ 1.87	$ 6.75	$ 6.97	$ 5.96
Contracts Accounted for under Percentage of Completion [Member]
Net EAC adjustments [Line Items]
Operating income									$ 371	$ 513	$ 557
Income from continuing operations attributable to Raytheon Company									$ 241	$ 333	$ 362
Diluted EPS from continuing operations attributable to Raytheon Company common stockholders									$ 0.79	$ 1.07	$ 1.12

Summary of Significant Accoun43

Summary of Significant Accounting Policies (Inventory) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Inventory [Line Items]
Materials and purchased parts	$ 69	$ 70
Work in process	551	326
Finished goods	15	18
Total	$ 635	$ 414

Summary of Significant Accoun44

Summary of Significant Accounting Policies (Property, Plant and Equipment, Net) (Details)	12 Months Ended
	Dec. 31, 2015
Minimum [Member] | Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Maximum [Member] | Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	45 years

Summary of Significant Accoun45

Summary of Significant Accounting Policies (Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Exchange Translation	$ (3)	$ 47	$ 60
Foreign exchange translation - Before-tax amount	(57)	(50)	(13)
Foreign exchange translation - Tax (expense) benefit	0	0	0
Foreign exchange translation - Net of tax amount	(57)	(50)	(13)
Accumulated Other Comprehensive Income (Loss), Foreign Exchange Translation	(60)	(3)	47
Accumulated Other Comprehensive Income (Loss), Cash flow hedges and interest rate locks	(14)	(8)	(5)
Cash flow hedges and interest rate locks - Before tax amount	(4)	(10)	(4)
Cash flow hedges and interest rate locks - Tax (expense) benefit	2	4	1
Cash flow hedges and interest rate locks - Net of tax amount	(2)	(6)	(3)
Accumulated Other Comprehensive Income (Loss), Cash flow hedges and interest rate locks	(16)	(14)	(8)
Accumulated Other Comprehensive Income (Loss), Unrealized gains (losses) on investments, and other, net	(9)	(9)	(10)
Unrealized gains (losses) on investments and other, net - Before tax amount	(5)	1	1
Unrealized gains (losses) on investments and other, net - Tax (expense) benefit	2	(1)	0
Unrealized gains (losses) on investments and other, net - Net of tax amount	(3)	0	1
Accumulated Other Comprehensive Income (Loss), Unrealized gains (losses) on investments, and other, net	(12)	(9)	(9)
Accumulated Other Comprehensive Income (Loss), Pension and Postretirement Benefit Plans, Net	(7,432)	(5,143)	(7,833)
Pension and postretirement benefit plans, net - Before tax amount	525	(3,514)	4,128
Pension and postretirement benefit plans, net - Tax (expense) benefit	(181)	1,225	(1,438)
Pension and postretirement benefit plans, net - Net of tax amount	344	(2,289)	2,690
Accumulated Other Comprehensive Income (Loss), Pension and Postretirement Benefit Plans, Net	(7,088)	(7,432)	(5,143)
Accumulated other comprehensive loss	(7,458)	(5,113)	(7,788)
Other comprehensive income (loss) - Before tax amount	459	(3,573)	4,112
Other comprehensive income (loss) - Tax (expense) benefit	(177)	1,228	(1,437)
Other comprehensive income (loss), net of tax	282	(2,345)	2,675
Accumulated other comprehensive loss	$ (7,176)	$ (7,458)	$ (5,113)

Eanings Per Share (EPS) (Narrat

Eanings Per Share (EPS) (Narrative) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share
Basic EPS from discontinued operations	$ 0.04	$ 0.21	$ 0.20
Diluted EPS from discontinued operations	$ 0.04	$ 0.21	$ 0.20
Number of preferred stocks BOD authorized to issue	200,000,000
Preferred stock par value per share	$ 0.01
Preferred Stock, Shares Outstanding	0	0

Earnings Per Share (EPS) (EPS f

Earnings Per Share (EPS) (EPS from Continuing Operations) (Details) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Basic EPS attributable to Raytheon Company common stockholders:
Distributed earnings									$ 2.67	$ 2.39	$ 2.19
Undistributed earnings									4.09	4.59	3.78
Total	$ 1.85	$ 1.47	$ 1.65	$ 1.79	$ 1.86	$ 1.66	$ 1.59	$ 1.87	6.76	6.98	5.97
Diluted EPS attributable to Raytheon Company common stockholders:
Distributed earnings									2.67	2.39	2.18
Undistributed earnings									4.08	4.58	3.78
Total	$ 1.85	$ 1.47	$ 1.65	$ 1.78	$ 1.86	$ 1.65	$ 1.59	$ 1.87	$ 6.75	$ 6.97	$ 5.96

Earnings Per Share (EPS) (Incom

Earnings Per Share (EPS) (Income from Participating Securities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share
Net income attributable to participating securities	$ 32	$ 40	$ 39
Continuing Operations [Member]
Earnings Per Share
Net income attributable to participating securities	32	39	38
Discontinued Operations [Member]
Earnings Per Share
Net income attributable to participating securities	0	$ 1	$ 1
Discontinued Operations [Member] | Maximum [Member]
Earnings Per Share
Net income attributable to participating securities	$ 1

Earnings Per Share (EPS) (Weigh

Earnings Per Share (EPS) (Weighted-average Shares Outstanding for Basic and Diluted EPS) (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares for basic EPS(1)	304,800,000	312,000,000	323,400,000
Dilutive effect of stock options and LTPP(2)	400,000	600,000	800,000
Shares for diluted EPS	305,200,000	312,600,000	324,200,000
Shares for Diluted EPS, Participating Securities	4,700,000	5,500,000	6,400,000
Stock options outstanding	0
Maximum [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock options outstanding		1,000,000	1,000,000

eBorders Settlement (Narative)

eBorders Settlement (Narative) (Details) £ in Millions, $ in Millions	1 Months Ended		12 Months Ended
	Mar. 31, 2015GBP (£)	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Loss Contingencies [Line Items]
Operating income			$ 3,013	$ 3,179	$ 2,938
eBorders [Member]
Loss Contingencies [Line Items]
Settlement Amount	£ 150	$ 226
Intelligence, Information and Services | eBorders [Member]
Loss Contingencies [Line Items]
Operating income			$ 181

Acquisitions and Goodwill (Narr

Acquisitions and Goodwill (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended			12 Months Ended
	Oct. 31, 2015	May. 29, 2015	Nov. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Payments for acquired companies, net of cash received				$ 1,954	$ 427	$ 9
Goodwill				14,731	13,061	12,764
Fair value of intangible assets acquired				509	126	3
Tax deductible goodwill related to acquisitions				312
Foreground Security [Member]
Business Acquisition [Line Items]
Payments for acquired companies, net of cash received	$ 62
Goodwill				50
Fair value of intangible assets acquired				$ 7
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				7 years
Websense, Inc. [Member]
Business Acquisition [Line Items]
Payments for acquired companies, net of cash received		$ 1,900
Goodwill				$ 1,624
Fair value of intangible assets acquired				501
Business Combination, Integration Related Costs				33
Blackbird [Member]
Business Acquisition [Line Items]
Payments for acquired companies, net of cash received			$ 427
Goodwill					300
Fair value of intangible assets acquired					$ 126
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					9 years
Visual Analytics [Member]
Business Acquisition [Line Items]
Goodwill						12
Fair value of intangible assets acquired						$ 3
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						7 years
Corporate Segment [Member] | Websense, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Integration Related Costs				$ 26

Acquisitions and Goodwill (Purc

Acquisitions and Goodwill (Purchase Price Allocation) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combination Segment Allocation [Line Items]
Goodwill	$ 14,731	$ 13,061	$ 12,764
Intangible assets	509	$ 126	$ 3
Websense, Inc. [Member]
Business Combination Segment Allocation [Line Items]
Accounts receivable (at contractually stated amounts)	38
Other current assets	21
Property, plant and equipment	19
Goodwill	1,624
Intangible assets	501
Other non-current assets	16
Deferred revenue	(225)
Current liabilities	(51)
Long-term liabilities	(52)
Fair value of net assets acquired	$ 1,891

Acquisitions and Goodwill (Inta

Acquisitions and Goodwill (Intangible Assets Acquired) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of intangible assets acquired	$ 509	$ 126	$ 3
Websense, Inc. [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of intangible assets acquired	$ 501
Websense, Inc. [Member] | Completed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Fair value of intangible assets acquired	$ 439
Websense, Inc. [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years
Fair value of intangible assets acquired	$ 43
Websense, Inc. [Member] | Trademarks and Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Fair value of intangible assets acquired	$ 19

Acquisitions and Goodwill (Roll

Acquisitions and Goodwill (Rollforward of Goodwill by Segments) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$ 13,061,000,000	$ 12,764,000,000
Acquisitions	1,676,000,000	301,000,000
Effect of foreign exchange rates and other	(6,000,000)	(4,000,000)
Ending Balance	14,731,000,000	13,061,000,000
Integrated Defense Systems
Goodwill [Roll Forward]
Beginning balance	1,797,000,000	1,800,000,000
Acquisitions	0	0
Effect of foreign exchange rates and other	(3,000,000)	(3,000,000)
Ending Balance	1,794,000,000	1,797,000,000
Intelligence, Information and Services
Goodwill [Roll Forward]
Beginning balance	2,823,000,000	2,523,000,000
Acquisitions	48,000,000	301,000,000
Effect of foreign exchange rates and other	(3,000,000)	(1,000,000)
Ending Balance	2,868,000,000	2,823,000,000
Missile Systems
Goodwill [Roll Forward]
Beginning balance	4,150,000,000	4,150,000,000
Acquisitions	4,000,000	0
Effect of foreign exchange rates and other	0	0
Ending Balance	4,154,000,000	4,150,000,000
Space and Airborne Systems
Goodwill [Roll Forward]
Beginning balance	4,106,000,000	4,106,000,000
Acquisitions	0	0
Effect of foreign exchange rates and other	0	0
Ending Balance	4,106,000,000	4,106,000,000
Forcepoint
Goodwill [Roll Forward]
Beginning balance	185,000,000	185,000,000
Acquisitions	1,624,000,000	0
Effect of foreign exchange rates and other	0	0
Ending Balance	$ 1,809,000,000	$ 185,000,000

Forcepoint Joint Venture (Narra

Forcepoint Joint Venture (Narrative) (Details) - Vista Equity Partners [Member] $ in Millions	1 Months Ended
	May. 29, 2015USD ($)
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	19.70%
Payments to Acquire Interest in Joint Venture	$ 343

Forcepoint Joint Venture Noncon

Forcepoint Joint Venture Noncontrolling interest rollforward (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Noncontrolling Interest [Line Items]
Beginning balance	$ 0	$ 0	$ 0
Sale of noncontrolling interest in Forcepoint	343,000,000	0	0
Net income (loss)	(17,000,000)	0	0
Other comprehensive income (loss), net of tax(1)	0	0	0
Adjustment of noncontrolling interest to redemption value	29,000,000	0	0
Ending balance	355,000,000	$ 0	$ 0
Maximum [Member]
Noncontrolling Interest [Line Items]
Other comprehensive income (loss), net of tax(1)	$ (1,000,000)

Discontinued Operations (Narrat

Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Cash Receipt from Settlement		$ 81
Disposal Group, Gain from Settlement		$ 52
Flight Options [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Excise Tax Dispute Payment Expense Recognized Discontinued Operations			$ 39
Gain (Loss) Related to Litigation Settlement	$ 33
Raytheon Aircraft Company [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on tax settlement	$ 25

Contracts in Process, Net (Narr

Contracts in Process, Net (Narrative) (Details) $ in Millions	Dec. 31, 2015USD ($)
Contracts in Process, Net [Line Items]
Unbilled amounts expected to be collected after one year	$ 250
Retentions	50
Retentions to be collected next year	$ 9

Contracts in Process, Net (Cont

Contracts in Process, Net (Contracts in Process) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Contracts in Process, Net [Line Items]
Allowance for doubtful accounts	$ (5)	$ (4)
Contracts in process, net	5,564	4,985
US Government [Member]
Contracts in Process, Net [Line Items]
Billed	628	635
Unbilled	9,248	9,228
Progress payments	(5,752)	(5,834)
Contracts in process, net	4,124	4,029
Other Customers [Member]
Contracts in Process, Net [Line Items]
Billed	546	407
Unbilled	1,338	1,154
Progress payments	(439)	(601)
Contracts in process, net	1,445	960
Fixed-Price [Member]
Contracts in Process, Net [Line Items]
Allowance for doubtful accounts	(5)	(4)
Contracts in process, net	4,222	3,725
Fixed-Price [Member] | US Government [Member]
Contracts in Process, Net [Line Items]
Billed	196	226
Unbilled	8,381	8,418
Progress payments	(5,752)	(5,834)
Contracts in process, net	2,825	2,810
Fixed-Price [Member] | Other Customers [Member]
Contracts in Process, Net [Line Items]
Billed	524	393
Unbilled	1,317	1,127
Progress payments	(439)	(601)
Contracts in process, net	1,402	919
Cost-Type [Member]
Contracts in Process, Net [Line Items]
Allowance for doubtful accounts	0	0
Contracts in process, net	1,342	1,260
Cost-Type [Member] | US Government [Member]
Contracts in Process, Net [Line Items]
Billed	432	409
Unbilled	867	810
Progress payments	0	0
Contracts in process, net	1,299	1,219
Cost-Type [Member] | Other Customers [Member]
Contracts in Process, Net [Line Items]
Billed	22	14
Unbilled	21	27
Progress payments	0	0
Contracts in process, net	$ 43	$ 41

Property, Plant and Equipment60

Property, Plant and Equipment, Net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 307	$ 301	$ 303

Property, Plant and Equipment61

Property, Plant and Equipment, Net (Property, Plant and Equipment, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Land	$ 86	$ 103
Buildings and improvements	2,530	2,607
Machinery and equipment	3,917	3,716
Property, plant and equipment, gross	6,533	6,426
Accumulated depreciation and amortization	(4,528)	(4,491)
Property, plant and equipment, net	$ 2,005	$ 1,935

Other Assets, Net (Narrative) (

Other Assets, Net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Assets, Net [Line Items]
Fair value of intangible assets acquired	$ 509	$ 126	$ 3
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	199
Finite-Lived Intangible Assets, Amortization Expense, Year Two	187
Finite-Lived Intangible Assets, Amortization Expense, Year Three	166
Finite-Lived Intangible Assets, Amortization Expense, Year Four	137
Finite-Lived Intangible Assets, Amortization Expense, Year Five	102
TRS [Member]
Other Assets, Net [Line Items]
Equity Method Investments	99	98
Equity method investments - TRS undistributed earnings	89
Receivables due to TRS LLC from TRS AMDC2	$ 16
Minimum [Member]
Other Assets, Net [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum [Member]
Other Assets, Net [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Computer Software, Intangible Asset [Member]
Other Assets, Net [Line Items]
Intangible assets amortization expense	$ 70	79	82
Other Intangible Assets [Member]
Other Assets, Net [Line Items]
Intangible assets amortization expense	$ 113	$ 58	$ 60

Other Assets, Net (Schedule of

Other Assets, Net (Schedule of Other Assets Net) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Other Assets, Net [Line Items]
Marketable securities held in trust(1)	$ 525	$ 519
Computer software, net of accumulated amortization of $1,059 and $992 at December 31, 2015 and 2014, respectively	294	313
Other intangible assets, net of accumulated amortization of $402 and $293 at December 31, 2015 and 2014, respectively	700	303
Other noncurrent assets, net	308	241
Deferred tax asset(2)	906	1,065
Total	2,733	2,441
Computer Software, Accumulated Amortization	1,059	922
Other Intangible Assets, Accumulated Amortization	$ 402	$ 293

Other Assets, Net (Schedule o64

Other Assets, Net (Schedule of Investments Included in Other Assets Net) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Other Assets, Net [Line Items]
Investments	$ 129	$ 109
TRS [Member]
Other Assets, Net [Line Items]
Equity Method Investments	$ 99	98
Equity Method Investment, Ownership Percentage	50.00%
RGNext [Member]
Other Assets, Net [Line Items]
Equity Method Investments	$ 11	0
Equity Method Investment, Ownership Percentage	50.00%
Other Entities [Member]
Other Assets, Net [Line Items]
Investments	$ 19	$ 11

Long-term Debt (Narrative) (Det

Long-term Debt (Narrative) (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2014USD ($)	Dec. 31, 2015USD ($)lenders	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Nov. 30, 2015USD ($)	Dec. 31, 2011USD ($)
Long-term Debt [Line Items]
Issuance of long-term debt, net of offering costs		$ 0	$ 592,000,000	$ 0
Borrowings outstanding on long-term line of credit	$ 0	0	0
Outstanding letters of credit that effectively reduced our borrowing capacity on credit facility	2,000,000	$ 0	2,000,000
Ratio of indebtedness to net capital		0.345
Total payments for interest on long-term debt		$ 232,000,000	209,000,000	$ 210,000,000
Credit Facility Maturing In 2020 [Member]
Long-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,250,000,000
Debt Instrument, Basis Spread on Variable Rate		0.805%
Number of highly rated lenders | lenders		20
Aggregate Maximum Percentage Of Any Single Lender		10.00%
Credit Facility - Terminated [Member]
Long-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 1,400,000,000
$600M Fixed-rate debt [Member]
Long-term Debt [Line Items]
Issuance of long-term debt, net of offering costs	592,000,000
Debt Instrument, Face Amount	$ 600,000,000		$ 600,000,000
Maximum [Member]
Long-term Debt [Line Items]
Ratio of indebtedness to net capital		0.60

Long-term Debt (Schedule of Not

Long-term Debt (Schedule of Notes Payable and Long-term Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015
Long-term Debt [Line Items]
Total debt issued and outstanding(1)	$ 5,325	$ 5,330
$251 notes due 2018, 6.75%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		6.75%
Total debt issued and outstanding(1)	251	$ 251
$340 notes due 2018, 6.40%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		6.40%
Total debt issued and outstanding(1)	339	$ 339
$500 notes due 2020, 4.40%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		4.40%
Total debt issued and outstanding(1)	497	$ 498
$1,000 notes due 2020, 3.125%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		3.125%
Total debt issued and outstanding(1)	992	$ 993
$1,100 notes due 2022, 2.50%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		2.50%
Total debt issued and outstanding(1)	1,092	$ 1,093
$300 Notes Due 2024, 3.15%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		3.15%
Total debt issued and outstanding(1)	296	$ 297
$382 notes due 2027, 7.20%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		7.20%
Total debt issued and outstanding(1)	369	$ 370
$185 notes due 2028, 7.00%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		7.00%
Total debt issued and outstanding(1)	184	$ 184
$600 notes due 2040, 4.875%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		4.875%
Total debt issued and outstanding(1)	591	$ 591
$425 notes due 2041, 4.70%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		4.70%
Total debt issued and outstanding(1)	419	$ 419
$300 Notes Due 2044, 4.20%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		4.20%
Total debt issued and outstanding(1)	295	$ 295
Other Assets [Member]
Long-term Debt [Line Items]
Reclassification due to new accounting pronouncement	$ 5

Long-term Debt (Fair value of l

Long-term Debt (Fair value of long-term debt) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Fair value of long-term debt	$ 5,826	$ 5,936

Long-term Debt (Adjustments and

Long-term Debt (Adjustments and payments to the Principal Amounts of Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Long-term Debt [Line Items]
Principal	$ 5,383	$ 5,383
Unamortized issue discounts	(43)	(48)
Unamortized interest rate lock costs	(10)	(10)
Total	5,330	$ 5,325
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	591
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	1,500
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	$ 3,292

Commitments and Contingencies69

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Rent expense	$ 236	$ 225	$ 248
Future Minimum Payments Due for IT outsourcing	15
Guarantees	213	266
Letters of Credit Outstanding, Amount	2,242	1,938
Contract Value	400
Estimated potential loss, minimum	180
Estimated potential loss, maximum	200
Notional value of offset agreement with certain customers in foreign countries	5,500
Thales- Raytheon Systems Co. Ltd.[Member]
Loss Contingencies [Line Items]
Guarantees	203	196
Letters of Credit Outstanding, Amount	187	244
Estimated liability related to guarantees and letters of credit	8	$ 9
Net payment due to Thales S.A.	$ 90

Commitments and Contingencies70

Commitments and Contingencies (Schedule of Annual Rentals on a Lease Basis) (Details) $ in Millions	Dec. 31, 2015USD ($)
Lease Commitments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 220
Operating Leases, Future Minimum Payments Due in Two Years	190
Operating Leases, Future Minimum Payments Due in Three Years	162
Operating Leases, Future Minimum Payments Due in Four Years	124
Operating Leases, Future Minimum Payments, Due in Five Years	102
Operating Leases, Future Minimum Payments Due Thereafter	$ 352

Commitments and Contingencies71

Commitments and Contingencies (Estimates of Total Remediation Costs, Weighted Average Risk-Free Rate, Total Remediation Costs - Discounted and Recoverable Portion) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Total remediation costs—undiscounted	$ 224	$ 202
Weighted-average discount rate	5.20%	5.50%
Total remediation costs—discounted	$ 149	$ 131
Recoverable portion	$ 94	$ 80

Commitments and Contingencies72

Commitments and Contingencies (Schedule of Environmental Remediation Costs) (Details) $ in Millions	Dec. 31, 2015USD ($)
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Next Twelve Months	$ 32
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Second Year	24
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Third Year	20
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Fourth Year	16
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Fifth Year	11
Accrual for Environmental Loss Contingencies, Undiscounted, Due in after Fifth Year	$ 121

Commitments and Contingencies73

Commitments and Contingencies (Stated Values Outstanding) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Guarantees	$ 213	$ 266
Letters of credit	2,242	1,938
Surety bonds	$ 264	$ 298

Commitments and Contingencies74

Commitments and Contingencies (Activity Related to Product Warranty Accruals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 32	$ 30	$ 33
Provisions for warranties	1	9	3
Warranty services provided	(9)	(7)	(6)
Ending balance	$ 24	$ 32	$ 30

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Billions

1 Months Ended

3 Months Ended

12 Months Ended

Mar. 31, 2015

Dec. 31, 2015

Sep. 27, 2015

Jun. 28, 2015

Mar. 29, 2015

Dec. 31, 2014

Sep. 28, 2014

Jun. 29, 2014

Mar. 30, 2014

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Nov. 30, 2015

Nov. 30, 2013

Sep. 30, 2011

Stockholders' Equity [Line Items]

Available outstanding common stock under repurchase programs

$ 2.5

$ 2.5

Percentage Of Change In Dividends Paid Per Share

11.00%

Dividends declared

$ 0.670

$ 0.670

$ 0.670

$ 0.670

$ 0.605

$ 0.605

$ 0.605

$ 0.605

$ 2.68

$ 2.42

$ 2.20

Maximum [Member]

Stockholders' Equity [Line Items]

Dividends declared

$ 2.68

$ 2.42

September Two Thousand Eleven Board of Directors Authorization [Member]

Stockholders' Equity [Line Items]

Stock Repurchase Program, Authorized Amount

$ 2

November Two Thousand Thirteen Board Of Directors Authorization [Member] [Member]

Stockholders' Equity [Line Items]

Stock Repurchase Program, Authorized Amount

$ 2

November Two Thousand Fifteen Board of Directors Authorization [Member]

Stockholders' Equity [Line Items]

Stock Repurchase Program, Authorized Amount

$ 2

Stockholders' Equity (Changes i

Stockholders' Equity (Changes in Shares of Common Stock Outstanding) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Beginning balance	307.3	314.5	328.1
Stock plans activity	1.6	1.4	2.4
Share repurchases	(9.9)	(8.6)	(16)
Ending balance	299	307.3	314.5

Stockholders' Equity (Repurchas

Stockholders' Equity (Repurchases of Common Stock Under Share Repurchase Programs) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity, Class of Treasury Stock [Line Items]
Total Share Repurchases	$ 1,099	$ 840	$ 1,123
Total Share Repurchases	9.9	8.6	16
Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Total Share Repurchases	$ 1,000	$ 750	$ 1,075
Total Share Repurchases	9	7.7	15.2
Satisfy tax withholding [Member]
Equity, Class of Treasury Stock [Line Items]
Total Share Repurchases	$ 99	$ 90	$ 48
Total Share Repurchases	0.9	0.9	0.8

Stock-based Compensation Plan78

Stock-based Compensation Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under stock plans	41,800,000
Shares available for new awards	7,000,000
Shares outstanding	4,700,000
Compensation expense related to nonvested awards not yet recognized	$ 156
Compensation expense related to nonvested awards expected to be recognized over a weighted-average period, years	1 year 6 months
Stock options outstanding	0
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding		1,000,000	1,000,000
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding	915,000	1,408,000	1,827,000	1,420,000
Return on invested capital, weighted	50.00%
Total Shareholder Return, weighted	25.00%
Cumulative free cash flow, weighted	25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	189,000	280,000	402,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	33,000	134,000	10,000
Long-Term Performance Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-Based Compensation Arrangement By Share Based Payment Award Weighted Target Award	0.00%
Long-Term Performance Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-Based Compensation Arrangement By Share Based Payment Award Weighted Target Award	200.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding	3,740,000	4,518,000	5,337,000	5,838,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,242,000	1,355,000	1,855,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	423,000	526,000	648,000
Raytheon Company 2010 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under stock plans	7,500,000
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Nonemployee Director [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Employee [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Forcepoint
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding	52,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	53,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	1,000
Stock-based Compensation Expense	$ 0
Forcepoint | Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	12,000

Stock-based Compensation Plan79

Stock-based Compensation Plans (Schedule of Stock-based Compensation Arrangements by Share-based Payment Award) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 140	$ 148	$ 129
Stock-based tax benefit recognized	44	48	39
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	92	81	82
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	26	28	3
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 22	$ 39	$ 44

Stock-based Compensation Plan80

Stock-based Compensation Plans (Schedule of Stock-based Compensation Arrangements by Share-based Payment Award - Restricted Stock and RSUs) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at end of period	4,700
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period	4,518	5,337	5,838
Granted	1,242	1,355	1,855
Vested	(1,597)	(1,648)	(1,708)
Forfeited	(423)	(526)	(648)
Outstanding at end of period	3,740	4,518	5,337
Weighted-average grant date fair value of stock outstanding at beginning of the period	$ 69.76	$ 56.10	$ 49.98
Weighted-average grant date fair value of stock granted	110.28	96.84	67.46
Weighted-average grant date fair value of stock vested	57.65	51.30	48.93
Weighted-average grant date fair value of stock forfeited	77.02	58.74	52.39
Weighted-average grant date fair value of stock outstanding at the end of the period	$ 87.57	$ 69.76	$ 56.10
Fair value of restricted stock and RSUs vested	$ 167	$ 161	$ 116
Tax benefit realized related to vested shares/units	$ 58	$ 56	$ 41

Stock-based Compensation Plan81

Stock-based Compensation Plans (Assumptions used in Monte Carlo Model) (Details) - Long-Term Performance Plan [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock price volatility	16.90%	18.93%	20.16%
Peer group stock price volatility	19.37%	23.19%	25.42%
Correlations of returns	59.51%	68.01%	70.53%
Risk free interest rate	0.89%	0.87%	0.38%

Stock-based Compensation Plan82

Stock-based Compensation Plans (Schedule of Stock-based Compensation Arrangements by Share-based Payment Award - LTPP) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at end of period	4,700
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period	1,408	1,827	1,420
Granted	189	280	402
Increase due to expected performance	148	99	398
Vested	(797)	(664)	(383)
Forfeited	(33)	(134)	(10)
Outstanding at end of period	915	1,408	1,827
Weighted-average grant date fair value of stock outstanding at beginning of the period	$ 60.53	$ 54.13	$ 52.57
Weighted-average grant date fair value of stock granted	112.14	97.59	61.38
Weighted-average grant date fair value of long-term performance plan stock increase	73.70	39.50	53.86
Weighted-average grant date fair value of stock vested	50.83	52.33	55.74
Weighted-average grant date fair value of stock forfeited	85.16	75.80	51.22
Weighted-average grant date fair value of stock outstanding at the end of the period	$ 80.83	$ 60.53	$ 54.13
Fair value of LTPP units vested	$ 93	$ 70	$ 23
Tax benefit realized related to vested LTPP units	$ 33	$ 25	$ 8
Expected dividend equivalent units [Member] | Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period	93	114
Outstanding at end of period	50	93	114

Stock-based Compensation Plan83

Stock-based Compensation Plans Stock-based Compensation Plans (Assumptions used in Black-Scholes Model) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected unit price volatility	16.90%	18.93%	20.16%
Risk free interest rate	0.89%	0.87%	0.38%
Grant date fair value	$ 80.83	$ 60.53	$ 54.13	$ 52.57
Forcepoint
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit Price	$ 1,000
Expected life (in years)	3 years 6 months
Expected unit price volatility	56.96%
Risk free interest rate	1.21%
Dividend yield	0.00%
Grant date fair value	$ 418.13

Pension and Other Employee Be84

Pension and Other Employee Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended			348 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Defined Benefit Plans and PRB Plans [Line Items]
Defined Contribution Plan, expense for contributions	$ 276	$ 274	$ 279
Amount invested in defined contribution plan	14,600	14,900		$ 14,900
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation	24,699	25,916		25,916
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets	18,111	19,459		19,459
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	22,546	23,520		23,520
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets	18,111	19,406		19,406
Accumulated Benefit Obligation (ABO)	$ 23,286	24,298		$ 24,298
Probability that ROA will fall within the 25th and 75th percentile range	50.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets				8.00%
Health care trend rate increase or decrease	1.00%
Effect of a 1% increase in assumed health care trend rate - accumulated postretirement benefit obligation	$ 6
Effect of a 1% decrease in assumed health care trend rate - accumulated postretirement benefit obligation	6
Defined Benefit Plan Assets invested un three indices	2,200
FMV of Plan's derivatives upper limit		(7)		$ (7)
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent	6,474	6,359		6,359
Required contributions to pension plans expected	140
Defined Benefit Plan, Net Periodic Benefit Expense (Income)	1,186	895	1,240
Projected benefit obligation for domestic and foreign qualified pension plans	$ 25,445	$ 26,649	$ 22,970	$ 26,649
Discount rate	4.45%	4.06%		4.06%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.91%	8.67%	8.67%
Defined Benefit Plan, Fair Value of Plan Assets	$ 18,900	$ 20,220	$ 19,628	$ 20,220
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent	352	352		352
Required contributions to pension plans expected	25
Defined Benefit Plan, Net Periodic Benefit Expense (Income)	12	8	10
Projected benefit obligation for domestic and foreign qualified pension plans	$ 745	$ 782	$ 732	$ 782
Discount rate	4.42%	4.05%		4.05%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.01%	8.24%	8.24%
Defined Benefit Plan, Fair Value of Plan Assets	$ 380	$ 418	$ 431	$ 418
Domestic Pension Benefits Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Projected benefit obligation for domestic and foreign qualified pension plans	$ 24,605	$ 25,745		$ 25,745
Discount rate	4.47%	4.08%		4.08%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.00%	8.75%
Actual return on assets	0.00%	6.00%	15.00%
Defined Benefit Plan, Fair Value of Plan Assets	$ 18,063	$ 19,352		$ 19,352
Domestic Pension Benefits Plan [Member] | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,491	7,394		7,394
Domestic Pension Benefits Plan [Member] | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	28	28		28
Foreign Pension Benefits Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Net Periodic Benefit Expense (Income)	(5)	(9)	$ 4
Projected benefit obligation for domestic and foreign qualified pension plans	840	904		904
Defined Benefit Plan, Fair Value of Plan Assets	$ 837	$ 868		868
Minimum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Percent company matches employees 401(K) contributions	3.00%
Maximum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Percent company matches employees 401(K) contributions	4.00%
Probability that ROA will fall below or above the 25th and 75th percentile range	25.00%
Defined Benefit Plan, Effect of One Percentage Point Increase or Decrease on Service and Interest Cost Components	$ 1
Individual investment, excluding funds that track to an index, percentage of total plan	5.00%
FMV of Plan's derivatives upper limit	$ 1
55th - 60th [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.00%
50th percentile [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.37%	7.59%	7.51%
60th-65th percentile [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		8.75%
65th-70th [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets			8.75%
Master Trust [Member] | PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 169	$ 185		185
Executive Officer [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Pension Plan, Liabilities, Noncurrent	38	39		39
Marketable Securities in Trust [Member] | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Assets, Fair Value Disclosure	525	519		519
Raytheon Stock Fund [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Amount invested in defined contribution plan	1,500	1,400		1,400
Nonqualified defined contribution plans [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Liabilities, Fair Value Disclosure	337	327		327
Nonqualified defined contribution plans [Member] | Marketable Securities in Trust [Member] | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Assets, Fair Value Disclosure	$ 337	$ 328		$ 328

Pension and Other Employee Be85

Pension and Other Employee Benefits (Fair value of plan assets) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Domestic Pension Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 18,063	$ 19,352
Foreign Pension Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 837	$ 868

Pension and Other Employee Be86

Pension and Other Employee Benefits (Marketable securities held in trust) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Inputs, Level 1 [Member] | Marketable Securities in Trust [Member]
Marketable Securities [Line Items]
Marketable securities held in trust	$ 525	$ 519

Pension and Other Employee Be87

Pension and Other Employee Benefits (Pension Contributions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension and Other Postretirement Benefit Expense [Abstract]
Required pension contributions	$ 339	$ 650	$ 778
Discretionary pension contributions	200	600	300
PRB contributions	22	20	22
Pension and Other Postretirement Benefit Contributions	$ 561	$ 1,270	$ 1,100

Pension and Other Employee Be88

Pension and Other Employee Benefits (Pension Benefits Expected to be Paid from Plans or Companies Assets) (Details) $ in Millions	Dec. 31, 2015USD ($)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 61
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	61
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	61
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	60
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	60
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	266
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	1,871
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	1,838
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	1,741
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	1,500
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	1,509
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 7,804

Pension and Other Employee Be89

Pension and Other Employee Benefits (Schedule of Components of Net Periodic Benefit Expense (Income) Pension) (Details) - Pension Benefits [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and PRB Plans [Line Items]
Service cost	$ 537	$ 448	$ 579
Interest cost	1,047	1,128	996
Expected return on plan assets	(1,533)	(1,580)	(1,495)
Amounts reflected in net funded status	51	(4)	80
Amortization of prior service cost included in net periodic expense	7	7	9
Recognized net actuarial loss	1,127	891	1,150
Loss recognized due to settlements	1	1	1
Amounts reclassified during the year	1,135	899	1,160
Net periodic expense (income)	$ 1,186	$ 895	$ 1,240

Pension and Other Employee Be90

Pension and Other Employee Benefits (Schedule of Components of Net Periodic Benefit Expense (Income) PRB Benefits) (Details) - PRB [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and PRB Plans [Line Items]
Service cost	$ 7	$ 6	$ 8
Interest cost	30	35	32
Expected return on plan assets	(28)	(33)	(32)
Amounts reflected in net funded status	9	8	8
Amortization of prior service cost included in net periodic expense	(1)	(1)	(2)
Recognized net actuarial loss	2	1	4
Loss recognized due to settlements	2	0	0
Amounts reclassified during the year	3	0	2
Net periodic expense (income)	$ 12	$ 8	$ 10

Pension and Other Employee Be91

Pension and Other Employee Benefits (Schedule of Funded Status Amounts Recognized on the Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Noncurrent assets	$ 43	$ 28
Current liabilities	(114)	(98)
Noncurrent liabilities	(6,474)	(6,359)
Net amount recognized on our balance sheets	(6,545)	(6,429)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Noncurrent assets	0	0
Current liabilities	(13)	(12)
Noncurrent liabilities	(352)	(352)
Net amount recognized on our balance sheets	$ (365)	$ (364)

Pension and Other Employee Be92

Pension and Other Employee Benefits (Schedule of Reconciliation of Amounts on the Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit	$ (14)	$ (18)
Net loss	(10,793)	(11,325)
Accumulated other comprehensive loss	(10,807)	(11,343)
Accumulated contributions in excess (below) net periodic benefit or cost	4,262	4,914
Net amount recognized on our balance sheets	(6,545)	(6,429)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit	2	4
Net loss	(107)	(98)
Accumulated other comprehensive loss	(105)	(94)
Accumulated contributions in excess (below) net periodic benefit or cost	(260)	(270)
Net amount recognized on our balance sheets	$ (365)	$ (364)

Pension and Other Employee Be93

Pension and Other Employee Benefits (Source of Change in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit arising during period	$ (2)	$ (11)	$ 0
Amortization of prior service cost (credit) included in net income	6	6	7
Actuarial gain (loss) arising during period	(622)	(4,410)	2,965
Amortization of net actuarial (gain) loss included in net income	1,129	892	1,154
Loss due to curtailments/settlements	4	0	0
Pension and postretirement benefit plans, net	525	(3,514)	$ 4,128
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit arising during period	(1)	(11)
Amortization of prior service cost (credit) included in net income	7	7
Net change in prior service (cost) credit not recognized in net income during that period	6	(4)
Actuarial gain (loss) arising during period	(609)	(4,334)
Amortization of net actuarial (gain) loss included in net income	1,127	891
Loss due to curtailments/settlements	2	0
Net change in actuarial gain (loss) not included in net income during the period	520	(3,443)
Effect of exchange rates	10	9
Pension and postretirement benefit plans, net	536	(3,438)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit arising during period	(1)	0
Amortization of prior service cost (credit) included in net income	(1)	(1)
Net change in prior service (cost) credit not recognized in net income during that period	(2)	(1)
Actuarial gain (loss) arising during period	(13)	(76)
Amortization of net actuarial (gain) loss included in net income	2	1
Loss due to curtailments/settlements	2	0
Net change in actuarial gain (loss) not included in net income during the period	(9)	(75)
Effect of exchange rates	0	0
Pension and postretirement benefit plans, net	$ (11)	$ (76)

Pension and Other Employee Be94

Pension and Other Employee Benefits (Adjustment to Accumulated Other Comprehensive Loss) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Amortization of net loss	$ (979)
Amortization of prior service (cost) credit	(5)
Total	(984)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Amortization of net loss	(4)
Amortization of prior service (cost) credit	1
Total	$ (3)

Pension and Other Employee Be95

Pension and Other Employee Benefits (PBO & ABO Schedule) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and PRB Plans [Line Items]
ABO for domestic qualified pension plans	$ 23,286	$ 24,298
Domestic Qualified Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
PBO for domestic qualified pension plans	23,623	24,767
ABO for domestic qualified pension plans	21,598	22,570
Asset values for domestic qualified pension plans	$ 18,063	$ 19,352

Pension and Other Employee Be96

Pension and Other Employee Benefits (Schedule of Change in Projected Benefit Obligation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Projected benefit obligation at beginning of year	$ 26,649	$ 22,970
Service cost	537	448	$ 579
Interest cost	1,047	1,128	996
Plan participants’ contributions	10	12
Amendments	1	12
Plan curtailments/settlements	(5)	(4)
Actuarial loss (gain)	(943)	4,007
Foreign exchange loss (gain)	(47)	(42)
Benefits paid	(1,804)	(1,882)
Projected benefit obligation at end of year	25,445	26,649	22,970
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Projected benefit obligation at beginning of year	782	732
Service cost	7	6	8
Interest cost	30	35	32
Plan participants’ contributions	50	50
Amendments	1	0
Plan curtailments/settlements	(9)	0
Actuarial loss (gain)	(17)	67
Foreign exchange loss (gain)	0	0
Benefits paid	(99)	(108)
Projected benefit obligation at end of year	$ 745	$ 782	$ 732

Pension and Other Employee Be97

Pension and Other Employee Benefits (Schedule of Change in Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Fair value of plan assets at beginning of year	$ 20,220	$ 19,628
Actual return (loss) on plan assets	(19)	1,254
Company contributions	539	1,250
Plan participants’ contributions	10	12
Plan settlements	(4)	(4)
Foreign exchange gain (loss)	(42)	(38)
Benefits paid	(1,804)	(1,882)
Fair value of plan assets at end of year	18,900	20,220
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Fair value of plan assets at beginning of year	418	431
Actual return (loss) on plan assets	(2)	25
Company contributions	22	20
Plan participants’ contributions	50	50
Plan settlements	(9)	0
Foreign exchange gain (loss)	0	0
Benefits paid	(99)	(108)
Fair value of plan assets at end of year	$ 380	$ 418

Pension and Other Employee Be98

Pension and Other Employee Benefits (Schedule of Weighted-Average Net Periodic Benefit Cost Assumptions) (Details)	12 Months Ended			348 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Defined Benefit Plans and PRB Plans [Line Items]
Expected long-term rate of return on plan assets				8.00%
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	4.06%	5.06%	4.15%
Expected long-term rate of return on plan assets	7.91%	8.67%	8.67%
Pension Benefits [Member] | Minimum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	2.00%	2.00%	2.00%
Pension Benefits [Member] | Maximum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	7.00%	7.00%	7.00%
Pension Benefits [Member] | Weighted Average [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	4.41%	4.40%	4.40%
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	4.05%	5.01%	4.00%
Expected long-term rate of return on plan assets	7.01%	8.24%	8.24%
Health care trend rate	4.00%	4.00%	4.00%
PRB [Member] | Minimum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	2.00%	2.00%	2.00%
PRB [Member] | Maximum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	7.00%	7.00%	7.00%
PRB [Member] | Weighted Average [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	4.50%	4.50%	4.50%

Pension and Other Employee Be99

Pension and Other Employee Benefits (Schedule of Weighted-Average Year-End Benefit Obligation Assumptions) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	4.45%	4.06%
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	4.42%	4.05%
Health care trend rate	4.00%	4.00%	4.00%
Minimum [Member] | Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	2.00%	2.00%
Minimum [Member] | PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	2.00%	2.00%
Maximum [Member] | Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	7.00%	7.00%
Maximum [Member] | PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	7.00%	7.00%
Weighted Average [Member] | Pension Benefits [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	4.40%	4.40%
Weighted Average [Member] | PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	4.50%	4.50%

Pension and Other Employee B100

Pension and Other Employee Benefits (Long term returns used in ROA assumptions) (Details)	12 Months Ended			348 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Long term returns used in ROA assumptions [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets				8.00%
25th percentile [Member]
Long term returns used in ROA assumptions [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		5.53%	5.62%
35th percentile [Member]
Long term returns used in ROA assumptions [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.37%
65th percentile [Member]
Long term returns used in ROA assumptions [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.37%
75th percentile [Member]
Long term returns used in ROA assumptions [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		9.65%	9.41%

Pension and Other Employee B101

Pension and Other Employee Benefits (Schedule of Investment Allocation Ranges) (Details)	12 Months Ended
	Dec. 31, 2015
Global Equity (combined U.S. and international equity)
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	40.00%
Investment policy asset allocation ranges maximum	60.00%
U.S. equities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	25.00%
Investment policy asset allocation ranges maximum	40.00%
International equities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	15.00%
Investment policy asset allocation ranges maximum	25.00%
Fixed-income securities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	25.00%
Investment policy asset allocation ranges maximum	40.00%
Cash and cash equivalents
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	1.00%
Investment policy asset allocation ranges maximum	10.00%
Private equity and private real estate
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	5.00%
Investment policy asset allocation ranges maximum	22.00%
Other (including absolute return funds)
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	5.00%
Investment policy asset allocation ranges maximum	20.00%

Pension and Other Employee B102

Pension and Other Employee Benefits (Schedule of Fair Value Measurements of the Company's Pension Plan Assets By Asset Category And By Level) (Details) - Domestic Pension Benefits Plan [Member] - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 18,063	$ 19,352
Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,491	7,394
Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,528	2,694
Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	28	28
Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	8,016	9,236
U.S. equities(1)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	5,341	6,833
U.S. equities(1) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,838	3,268
U.S. equities(1) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
U.S. equities(1) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
U.S. equities(1) | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,503	3,565
International equities(1)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,954	2,792
International equities(1) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,043	1,749
International equities(1) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1	0
International equities(1) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
International equities(1) | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	910	1,043
U.S. government and agency securities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	344	112
U.S. government and agency securities | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	258	104
U.S. government and agency securities | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	86	8
U.S. government and agency securities | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
U.S. government and agency securities | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Corporate debt securities/instruments(2)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,671	2,813
Corporate debt securities/instruments(2) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	109	161
Corporate debt securities/instruments(2) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,440	2,528
Corporate debt securities/instruments(2) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Corporate debt securities/instruments(2) | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	122	124
Core fixed-income(3)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,172	1,215
Core fixed-income(3) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,172	1,098
Core fixed-income(3) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Core fixed-income(3) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Core fixed-income(3) | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	117
Global multi-sector fixed-income(4)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	434	456
Global multi-sector fixed-income(4) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	434	456
Global multi-sector fixed-income(4) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Global multi-sector fixed-income(4) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Global multi-sector fixed-income(4) | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Securitized and structured credit(5)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	818	1,006
Securitized and structured credit(5) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Securitized and structured credit(5) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Securitized and structured credit(5) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Securitized and structured credit(5) | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	818	1,006
Cash and cash equivalents(6)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	877	820
Cash and cash equivalents(6) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	637	558
Cash and cash equivalents(6) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1	158
Cash and cash equivalents(6) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Cash and cash equivalents(6) | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	239	104
Absolute return funds
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,406	1,478
Absolute return funds | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Absolute return funds | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Absolute return funds | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Absolute return funds | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,406	1,478
Private equity funds
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,068	938
Private equity funds | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Private equity funds | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Private equity funds | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Private equity funds | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,068	938
Private real estate funds
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	997	692
Private real estate funds | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Private real estate funds | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Private real estate funds | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Private real estate funds | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	997	692
Insurance contracts
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	28	28
Insurance contracts | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Insurance contracts | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Insurance contracts | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	28	28
Insurance contracts | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Total investments
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	18,110	19,183
Total investments | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,491	7,394
Total investments | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,528	2,694
Total investments | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	28	28
Total investments | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	8,063	9,067
Net receivables and payables
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	(47)	169
Net receivables and payables | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Net receivables and payables | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Net receivables and payables | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Net receivables and payables | Not subject to leveling [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ (47)	$ 169

Pension and Other Employee B103

Pension and Other Employee Benefits Pension and Other Employee Benefits (VEBA Trusts) (Details) - VEBA [Member]	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Fixed-income securities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	45.00%	46.00%
U.S. equities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	40.00%	41.00%
International equities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	10.00%	10.00%
Cash and cash equivalents
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Actual Plan Asset Allocations	5.00%	3.00%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Federal and foreign income taxes	$ (733)	$ (790)	$ (808)
Unrecognized Tax Benefits, Period Decrease	100
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0	0	51
Undistributed Earnings of Foreign Subsidiaries	688
Unrecognized Tax Benefits	7	104	118	$ 129
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2	6	5
Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued Net Of The Federal Tax Benefit	0.5	4	3
Net State Income Tax Expense Allocated To Contracts	28	41	42
Tax expense (benefit) related to discontinued operations	(14)	23	(5)
Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			$ 70
Raytheon United Kingdom [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	133
Dividend Paid [Member] | Foreign Subsidiary [Member]
Income Taxes [Line Items]
Federal and foreign income taxes		80
Cash Dividends Paid to Parent Company		115
Research and Development Credit
Income Taxes [Line Items]
Federal and foreign income taxes	33	$ 30
Forcepoint | Federal
Income Taxes [Line Items]
Operating Loss Carryforwards	155
Forcepoint | State
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 114

Income Taxes (Schedule of Provi

Income Taxes (Schedule of Provision for Federal and Foreign Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	$ 757	$ 837	$ 723
Current Foreign Tax Expense (Benefit)	36	13	17
Current State and Local Tax Expense (Benefit)	(4)	0	0
Deferred Federal Income Tax Expense (Benefit)	(103)	(73)	36
Deferred Foreign Income Tax Expense (Benefit)	45	13	32
Deferred State and Local Income Tax Expense (Benefit)	2	0	0
Income Tax Expense (Benefit)	$ 733	$ 790	$ 808

Income Taxes (Schedule of Expen

Income Taxes (Schedule of Expenses for Income Taxes that Differ from the US Statutory Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory tax rate	35.00%	35.00%	35.00%
Research and development tax credit	(1.20%)	(1.10%)	(1.80%)
Tax settlements and refund claims	(3.20%)	(0.50%)	(0.80%)
Domestic manufacturing deduction benefit	(3.10%)	(2.70%)	(2.10%)
Foreign income tax rate differential	(1.40%)	(0.60%)	(0.00%)
Tax benefit on foreign dividend	(0.00%)	(2.80%)	(0.00%)
Other, net	0.20%	(0.80%)	(1.00%)
Effective tax rate	26.30%	26.50%	29.30%

Income Taxes (Schedule of Domes

Income Taxes (Schedule of Domestic and Foreign Income from continuing operations before taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Domestic income from continuing operations before taxes	$ 2,482	$ 2,868	$ 2,612
Foreign income from continuing operations before taxes	$ 305	$ 115	$ 145

Income Taxes (Schedule of Incom

Income Taxes (Schedule of Income Taxes Paid, Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Federal
Income Taxes [Line Items]
Income Taxes Paid, Net	$ 1,008	$ 705	$ 628
Foreign
Income Taxes [Line Items]
Income Taxes Paid, Net	43	19	22
State
Income Taxes [Line Items]
Income Taxes Paid, Net	$ 30	$ 35	$ 39

Income Taxes (Rollforward of Un

Income Taxes (Rollforward of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of year	$ 104	$ 118	$ 129
Additions based on current year tax positions	4	1	104
Additions based on prior year tax positions	1	10	0
Reductions based on prior year tax positions	(102)	(25)	(64)
Settlements based on prior year tax positions	0	0	(51)
Unrecognized tax benefits, end of year	$ 7	$ 104	$ 118

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Income Tax) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Components of Deferred Tax Assets and Liabilities [Abstract]
Accrued employee compensation and benefits	$ 322	$ 242
Other accrued expenses and reserves	133	132
Contracts in process and inventories	(841)	(539)
Pension benefits	2,355	2,242
Other retiree benefits	109	110
Net operating loss and tax credit carryforwards	115	101
Depreciation and amortization	(1,385)	(1,337)
Other	79	106
Deferred income taxes-noncurrent	$ 887	$ 1,057

Business Segment Reporting (Seg

Business Segment Reporting (Segment Operating Performance) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Sales, net	$ 6,328	$ 5,783	$ 5,848	$ 5,288	$ 6,143	$ 5,474	$ 5,701	$ 5,508	$ 23,247	$ 22,826	$ 23,706
Operating income									3,013	3,179	2,938
Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, net									23,308	22,826	23,706
Operating income									3,048	2,960	3,215
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Sales, net									6,375	6,085	6,489
Operating income									917	974	1,115
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Sales, net									5,733	5,889	5,970
Operating income									599	495	507
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Sales, net									6,556	6,309	6,599
Operating income									867	800	830
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Sales, net									5,796	6,072	6,371
Operating income									794	846	920
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Sales, net									328	104	87
Operating income									30	11	13
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, net									(1,480)	(1,633)	(1,810)
Operating income									(159)	(166)	(170)
Intersegment Eliminations [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Sales, net									(69)	(107)	(107)
Operating income									(3)	(8)	(9)
Intersegment Eliminations [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Sales, net									(769)	(827)	(816)
Operating income									(86)	(83)	(72)
Intersegment Eliminations [Member] | Missile Systems
Segment Reporting Information [Line Items]
Sales, net									(143)	(140)	(163)
Operating income									(15)	(14)	(17)
Intersegment Eliminations [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Sales, net									(484)	(548)	(711)
Operating income									(47)	(52)	(62)
Intersegment Eliminations [Member] | Forcepoint
Segment Reporting Information [Line Items]
Sales, net									(15)	(11)	(13)
Operating income									(8)	(9)	(10)
Segment Reconciling Items [Member] | Forcepoint Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Sales, net									(61)	0	0
Operating income									(119)	(6)	(9)
Fair value adjustments to deferred revenue [Member] | Forcepoint Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income									(61)
Intangible amortization adjustments [Member] | Forcepoint Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income									(58)	(6)	(9)
FAS CAS Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income									185	286	(249)
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Operating income									$ (101)	(61)	(19)
Maximum [Member] | Segment Reconciling Items [Member] | Forcepoint Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Sales, net										(1)	(1)
Maximum [Member] | Fair value adjustments to deferred revenue [Member] | Forcepoint Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income										$ (1)	$ (1)

Business Segment Reporting (Com

Business Segment Reporting (Components of FAS/CAS Adjustment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Operating income	$ 3,013	$ 3,179	$ 2,938
FAS/CAS Pension Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	182	281	(253)
FAS/CAS PRB Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	3	5	4
FAS CAS Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	$ 185	$ 286	$ (249)

Business Segment Reporting (Cap

Business Segment Reporting (Capital Expenditures) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Capital expenditures	$ 425	$ 326	$ 280
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Capital expenditures	126	99	69
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Capital expenditures	85	41	28
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Capital expenditures	62	56	55
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Capital expenditures	131	117	117
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Capital expenditures	10	0	0
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 11	$ 13	$ 11

Business Segment Reporting (Dep

Business Segment Reporting (Depreciation and Amortization) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Depreciation and Amortization	$ 489	$ 439	$ 445
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization	90	95	96
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Depreciation and Amortization	57	50	52
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization	75	76	76
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization	166	168	158
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Depreciation and Amortization	8	1	1
Segment Reconciling Items [Member] | Forcepoint Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Depreciation and Amortization	58	6	9
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and Amortization	$ 35	$ 43	$ 53

Business Segment Reporting (115

Business Segment Reporting (Components of Total Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets	$ 29,281	$ 27,716
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Total assets	4,357	4,128
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Total assets	4,155	4,032
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Total assets	6,561	6,223
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Total assets	6,416	6,414
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Intangible assets, net	452	10
Total assets	2,486	211
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Total assets	$ 5,306	$ 6,708

Business Segment Reporting (Sch

Business Segment Reporting (Schedule of Total Net Sales by Geographic Areas) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total net sales	$ 6,328	$ 5,783	$ 5,848	$ 5,288	$ 6,143	$ 5,474	$ 5,701	$ 5,508	$ 23,247	$ 22,826	$ 23,706
United States
Segment Reporting Information [Line Items]
Total Sales by Geographic Areas									16,097	16,285	17,260
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total Sales by Geographic Areas									2,429	2,390	2,590
MENA
Segment Reporting Information [Line Items]
Total Sales by Geographic Areas									3,446	2,857	2,396
All Other (Principally Europe)
Segment Reporting Information [Line Items]
Total Sales by Geographic Areas									$ 1,275	$ 1,294	$ 1,460

Business Segment Reporting (Sal

Business Segment Reporting (Sales to Major Customers) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
US Government [Member]
Revenue, Major Customer [Line Items]
Sales	$ 15,767	$ 16,083	$ 17,019
Department of Defense [Member]
Revenue, Major Customer [Line Items]
Sales	14,876	15,059	16,015
International Sales, including Foreign Military Sales [Member]
Revenue, Major Customer [Line Items]
Sales	7,150	6,541	6,446
Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member]
Revenue, Major Customer [Line Items]
Sales	4,336	3,579	3,384
Foreign Military Sales through US Government [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,814	$ 2,962	$ 3,062

Business Segment Reporting (118

Business Segment Reporting (Schedule of Property Plant and Equipment by Geographic Area) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 2,005	$ 1,935
United States
Segment Reporting Information [Line Items]
Property, plant and equipment, net	1,928	1,847
All Other (Principally Europe)
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 77	$ 88

Quarterly Operating Results 119

Quarterly Operating Results (Unaudited) (Schedule of Quarterly Operating Results) (Details) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015USD ($)workdays$ / shares	Sep. 27, 2015USD ($)workdays$ / shares	Jun. 28, 2015USD ($)workdays$ / shares	Mar. 29, 2015USD ($)workdays$ / shares	Dec. 31, 2014USD ($)workdays$ / shares	Sep. 28, 2014USD ($)workdays$ / shares	Jun. 29, 2014USD ($)workdays$ / shares	Mar. 30, 2014USD ($)workdays$ / shares	Dec. 31, 2015USD ($)$ / shares	Dec. 31, 2014USD ($)$ / shares	Dec. 31, 2013USD ($)$ / shares
Quarterly Financial Information [Line Items]
Total net sales | $	$ 6,328	$ 5,783	$ 5,848	$ 5,288	$ 6,143	$ 5,474	$ 5,701	$ 5,508	$ 23,247	$ 22,826	$ 23,706
Gross margin | $	1,520	1,375	1,323	1,455	1,481	1,303	1,400	1,347
Income from continuing operations | $	554	444	502	554	580	519	501	593	2,061	2,179	1,932
Net income attributable to Raytheon Company | $	$ 571	$ 447	$ 505	$ 551	$ 582	$ 515	$ 551	$ 596	$ 2,074	$ 2,244	$ 1,996
Basic EPS from continuing operations attributable to Raytheon Company common stockholders | $ / shares	$ 1.85	$ 1.47	$ 1.65	$ 1.79	$ 1.86	$ 1.66	$ 1.59	$ 1.87	$ 6.76	$ 6.98	$ 5.97
Diluted EPS from continuing operations attributable to Raytheon Company common stockholders | $ / shares	1.85	1.47	1.65	1.78	1.86	1.65	1.59	1.87	6.75	6.97	5.96
Basic EPS attributable to Raytheon Company common stockholders | $ / shares	1.89	1.47	1.65	1.79	1.88	1.66	1.76	1.89	6.81	7.19	6.17
Diluted EPS attributable to Raytheon Company common stockholders | $ / shares	1.89	1.47	1.65	1.79	1.88	1.65	1.76	1.89	6.80	7.18	6.16
Cash dividends per share, declared | $ / shares	0.670	0.670	0.670	0.670	0.605	0.605	0.605	0.605	$ 2.68	$ 2.42	$ 2.20
Cash dividends per share, paid | $ / shares	$ 0.670	$ 0.670	$ 0.670	$ 0.605	$ 0.605	$ 0.605	$ 0.605	$ 0.550
Workdays | workdays	61	63	64	61	60	63	64	62
Operating income | $									$ 3,013	$ 3,179	$ 2,938
Federal and foreign income taxes | $									$ (733)	$ (790)	$ (808)
Maximum [Member]
Quarterly Financial Information [Line Items]
Cash dividends per share, declared | $ / shares									$ 2.68	$ 2.42
Common stock price | $ / shares	$ 127.95	$ 110.33	$ 110.99	$ 112.40	$ 110.47	$ 103.35	$ 101.47	$ 101.31	127.95	110.47
Minimum [Member]
Quarterly Financial Information [Line Items]
Common stock price | $ / shares	$ 105.69	$ 95.57	$ 97.79	$ 100.05	$ 93.85	$ 89.43	$ 94.08	$ 88.13	$ 105.69	$ 93.85
Dividend Paid [Member] | Foreign Subsidiary [Member]
Quarterly Financial Information [Line Items]
Cash Dividends Paid to Parent Company | $										$ 115
Federal and foreign income taxes | $										$ 80
Intelligence, Information and Services | eBorders [Member]
Quarterly Financial Information [Line Items]
Operating income | $									$ 181