Raytheon 10-K 13 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information Document - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Feb. 11, 2019	Jun. 29, 2018
Entity Information [Line Items]
Document Type	10-K
Document Period End Date	Dec. 31, 2018
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 Fiscal Year Focus	2,018
Trading Symbol	RTN
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		282,239,000
Entity Shell Company	false
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			$ 55

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 3,608,000,000	$ 3,103,000,000
Short-term Investments	0	297,000,000
Receivables, net	1,648,000,000	1,324,000,000
Contract assets	5,594,000,000	5,247,000,000
Inventories	758,000,000	594,000,000
Prepaid expenses and other current assets	528,000,000	761,000,000
Total current assets	12,136,000,000	11,326,000,000
Property, plant and equipment, net	2,840,000,000	2,439,000,000
Goodwill	14,864,000,000	14,871,000,000
Other assets, net	2,024,000,000	2,224,000,000
Total assets	31,864,000,000	30,860,000,000
Current liabilities
Commercial paper	300,000,000	300,000,000
Contract liabilities	3,309,000,000	2,927,000,000
Accounts payable	1,964,000,000	1,519,000,000
Accrued employee compensation	1,509,000,000	1,342,000,000
Other current liabilities	1,206,000,000	1,260,000,000
Total current liabilities	8,288,000,000	7,348,000,000
Accrued retiree benefits and other long-term liabilities	6,938,000,000	8,287,000,000
Long-term debt	4,755,000,000	4,750,000,000
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest (Note 11)	411,000,000	512,000,000
Raytheon Company stockholders’ equity
Common stock, par value, $0.01 per share, 1,450 shares authorized, 282 and 288 shares outstanding at December 31, 2018 and 2017, respectively	3,000,000	3,000,000
Additional paid-in capital	0	0
Accumulated other comprehensive loss	(8,618,000,000)	(7,935,000,000)
Retained earnings	20,087,000,000	17,895,000,000
Total Raytheon Company stockholders’ equity	11,472,000,000	9,963,000,000
Noncontrolling interests in subsidiaries	0	0
Total equity	11,472,000,000	9,963,000,000
Total liabilities, redeemable noncontrolling interest and equity	$ 31,864,000,000	$ 30,860,000,000

CONSOLIDATED BALANCE SHEETS Con

CONSOLIDATED BALANCE SHEETS Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Millions	Dec. 31, 2018	Dec. 31, 2017
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,450	1,450
Common Stock, Shares, Outstanding	282.1	288.4

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales
Net sales	$ 27,058	$ 25,348	$ 24,124
Operating expenses
General and administrative expenses	2,947	2,777	2,721
Total operating expenses	22,520	21,117	20,228
Operating income	4,538	4,231	3,896
Non-operating (income) expense, net
Retirement benefits non-service expense	1,230	913	601
Interest expense	184	205	232
Interest income	(31)	(21)	(16)
Other (income) expense, net	8	21	(6)
Total non-operating (income) expense, net	1,391	1,118	811
Income from continuing operations before taxes	3,147	3,113	3,085
Federal and foreign income taxes	264	1,114	873
Income from continuing operations	2,883	1,999	2,212
Income (loss) from discontinued operations, net of tax	(1)	2	1
Net income	2,882	2,001	2,213
Less: Net income (loss) attributable to noncontrolling interests in subsidiaries	(27)	(23)	(31)
Net income attributable to Raytheon Company	$ 2,909	$ 2,024	$ 2,244
Basic earnings per share attributable to Raytheon Company common stockholders:
Income from continuing operations	$ 10.16	$ 6.95	$ 7.55
Income (loss) from discontinued operations, net of tax	0	0.01	0
Net income	10.16	6.96	7.56
Diluted earnings per share attributable to Raytheon Company common stockholders:
Income from continuing operations	10.15	6.94	7.55
Income (loss) from discontinued operations, net of tax	0	0.01	0
Net income	$ 10.15	$ 6.95	$ 7.55
Amounts attributable to Raytheon Company common stockholders:
Income from continuing operations	$ 2,910	$ 2,022	$ 2,243
Income (loss) from discontinued operations, net of tax	(1)	2	1
Net income	2,909	2,024	2,244
Products [Member]
Net sales
Net sales	22,633	21,416	20,309
Operating expenses
Cost of Sales	16,108	15,252	14,462
Services [Member]
Net sales
Net sales	4,425	3,932	3,815
Operating expenses
Cost of Sales	$ 3,465	$ 3,088	$ 3,045

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 2,882,000,000	$ 2,001,000,000	$ 2,213,000,000
Pension and other postretirement benefit plans, net:
Prior service (cost) credit arising during period	(10,000,000)	(15,000,000)	(1,000,000)
Amortization of prior service cost (credit) included in net income	6,000,000	4,000,000	4,000,000
Actuarial gain (loss) arising during period	(626,000,000)	(1,816,000,000)	(1,238,000,000)
Amortization of net actuarial (gain) loss	1,362,000,000	1,187,000,000	1,002,000,000
Loss recognized due to settlements/curtailments	287,000,000	3,000,000	5,000,000
Effect of exchange rates	9,000,000	(14,000,000)	25,000,000
Pension and other postretirement benefit plans, net	1,028,000,000	(651,000,000)	(203,000,000)
Foreign exchange translation	(36,000,000)	80,000,000	(115,000,000)
Cash flow hedges	(12,000,000)	10,000,000	25,000,000
Unrealized gains (losses) on investments and other, net	1,000,000	(1,000,000)	15,000,000
Other comprehensive income (loss), before tax	981,000,000	(562,000,000)	(278,000,000)
Income tax benefit (expense) related to items of other comprehensive income (loss)	(213,000,000)	38,000,000	43,000,000
Other comprehensive income (loss), net of tax	768,000,000	(524,000,000)	(235,000,000)
Reclassification of stranded tax effects	(1,451,000,000)	0	0
Total comprehensive income (loss)	2,199,000,000	1,477,000,000	1,978,000,000
Less: Comprehensive income (loss) attributable to noncontrolling interests in subsidiaries	(27,000,000)	(23,000,000)	(31,000,000)
Comprehensive income (loss) attributable to Raytheon Company	$ 2,226,000,000	$ 1,500,000,000	$ 2,009,000,000

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($)	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, 2015	$ 10,383,000,000	$ 3,000,000	$ 398,000,000	$ (7,176,000,000)	$ 16,956,000,000	$ 10,181,000,000	$ 202,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Raytheon Company	2,244,000,000				2,244,000,000	2,244,000,000
Net income (loss) excluding redeemable noncontrolling interest	2,229,000,000						(15,000,000)
Other comprehensive income (loss), net of tax	(235,000,000)			(235,000,000)		(235,000,000)
Adjustment of redeemable noncontrolling interest to redemption value	(138,000,000)				(138,000,000)	(138,000,000)
Distributions and other activity related to noncontrolling interests	(382,000,000)				(195,000,000)	(195,000,000)	(187,000,000)
Dividends declared	(864,000,000)		3,000,000		(867,000,000)	(864,000,000)
Common stock plans activity	160,000,000		160,000,000			160,000,000
Share repurchases	(996,000,000)		(561,000,000)		(435,000,000)	(996,000,000)
Ending Balance at Dec. 31, 2016	10,157,000,000	3,000,000	0	(7,411,000,000)	17,565,000,000	10,157,000,000	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Raytheon Company	2,024,000,000				2,024,000,000	2,024,000,000
Net income (loss) excluding redeemable noncontrolling interest	2,024,000,000						0
Other comprehensive income (loss), net of tax	(524,000,000)			(524,000,000)		(524,000,000)
Adjustment of redeemable noncontrolling interest to redemption value	(41,000,000)				(41,000,000)	(41,000,000)
Dividends declared	(927,000,000)		2,000,000		(929,000,000)	(927,000,000)
Common stock plans activity	159,000,000		159,000,000			159,000,000
Share repurchases	(885,000,000)		(161,000,000)		(724,000,000)	(885,000,000)
Ending Balance at Dec. 31, 2017	9,963,000,000	3,000,000	0	(7,935,000,000)	17,895,000,000	9,963,000,000	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to Raytheon Company	2,909,000,000				2,909,000,000	2,909,000,000
Net income (loss) excluding redeemable noncontrolling interest	2,909,000,000						0
Other comprehensive income (loss), net of tax	768,000,000			768,000,000		768,000,000
Reclassification of stranded tax effects	0			(1,451,000,000)	1,451,000,000	0
Adjustment of redeemable noncontrolling interest to redemption value	73,000,000				73,000,000	73,000,000
Dividends declared	(989,000,000)		2,000,000		(991,000,000)	(989,000,000)
Common stock plans activity	166,000,000		166,000,000			166,000,000
Share repurchases	(1,418,000,000)		(168,000,000)		(1,250,000,000)	(1,418,000,000)
Ending Balance at Dec. 31, 2018	$ 11,472,000,000	$ 3,000,000	$ 0	$ (8,618,000,000)	$ 20,087,000,000	$ 11,472,000,000	$ 0
[1]	Excludes redeemable noncontrolling interest which is not considered equity. See “Note 11: Forcepoint Joint Venture” for additional information.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net income	$ 2,882,000,000	$ 2,001,000,000	$ 2,213,000,000
(Income) loss from discontinued operations, net of tax	1,000,000	(2,000,000)	(1,000,000)
Income from continuing operations	2,883,000,000	1,999,000,000	2,212,000,000
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	568,000,000	550,000,000	515,000,000
Stock-based compensation	165,000,000	173,000,000	151,000,000
Gain on sale of equity method investment	0	0	(158,000,000)
Loss on repayment of long-term debt	0	39,000,000	0
Deferred income taxes	(24,000,000)	252,000,000	133,000,000
Changes in assets and liabilities
Receivables, net	(327,000,000)	(157,000,000)	18,000,000
Contract assets and contract liabilities	28,000,000	88,000,000	(645,000,000)
Inventories	(166,000,000)	14,000,000	(10,000,000)
Prepaid expenses and other current assets	73,000,000	204,000,000	205,000,000
Income taxes receivable/payable	174,000,000	(193,000,000)	(185,000,000)
Accounts payable	406,000,000	(94,000,000)	152,000,000
Accrued employee compensation	165,000,000	111,000,000	77,000,000
Other current liabilities	(108,000,000)	106,000,000	(41,000,000)
Accrued retiree benefits	(421,000,000)	(250,000,000)	419,000,000
Other, net	12,000,000	(95,000,000)	9,000,000
Net cash provided by (used in) operating activities from continuing operations	3,428,000,000	2,747,000,000	2,852,000,000
Net cash provided by (used in) operating activities from discontinued operations	0	(2,000,000)	0
Net cash provided by (used in) operating activities	3,428,000,000	2,745,000,000	2,852,000,000
Cash flows from investing activities
Additions to property, plant and equipment	(763,000,000)	(543,000,000)	(561,000,000)
Proceeds from sales of property, plant and equipment	2,000,000	46,000,000	34,000,000
Additions to capitalized internal use software	(58,000,000)	(68,000,000)	(64,000,000)
Purchases of short-term investments	0	(696,000,000)	(472,000,000)
Maturities of short-term investments	309,000,000	517,000,000	1,184,000,000
Payments for purchases of acquired companies, net of cash received	0	(93,000,000)	(57,000,000)
Proceeds from sale of business, net of transaction costs	11,000,000	0	0
Other	(22,000,000)	20,000,000	(11,000,000)
Net cash provided by (used in) investing activities	(521,000,000)	(817,000,000)	53,000,000
Cash flows from financing activities
Dividends paid	(975,000,000)	(910,000,000)	(850,000,000)
Net borrowings (payments) on commercial paper	0	300,000,000	0
Repayments of long-term debt	0	(591,000,000)	0
Loss on repayment of long-term debt	0	(38,000,000)	0
Acquisition of noncontrolling interest in RCCS LLC	0	0	(90,000,000)
Contribution from noncontrolling interest in Forcepoint	0	8,000,000	11,000,000
Other	(5,000,000)	0	(5,000,000)
Net cash provided by (used in) financing activities	(2,398,000,000)	(2,116,000,000)	(1,930,000,000)
Net increase (decrease) in cash, cash equivalents and restricted cash	509,000,000	(188,000,000)	975,000,000
Cash, cash equivalents and restricted cash at beginning of year	3,115,000,000	3,303,000,000	2,328,000,000
Cash, cash equivalents and restricted cash at end of year	3,624,000,000	3,115,000,000	3,303,000,000
Share Repurchase Program [Member]
Cash flows from financing activities
Repurchases of common stock under share repurchase programs	(1,325,000,000)	(800,000,000)	(900,000,000)
Satisfy tax withholding [Member]
Cash flows from financing activities
Repurchases of common stock under share repurchase programs	$ (93,000,000)	$ (85,000,000)	$ (96,000,000)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
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, we reclassified certain amounts to conform to our current period presentation. See Accounting Standards, below, for additional information on reclassifications. 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 — The vast majority of our revenues are from long-term contracts associated with the design, development, manufacture or modification of complex aerospace or defense equipment or related services. These contracts primarily are with the U.S. government (including foreign military sales contracted through the U.S. government). Our contracts with the U.S. government typically are subject to the Federal Acquisition Regulation (FAR) and are priced based on estimated or actual costs of producing goods or providing services. The FAR provides guidance on the types of costs that are allowable in establishing prices for goods and services provided under U.S. government contracts. The pricing for non-U.S. government contracts is based on the specific negotiations with each customer. Under the typical payment terms of our U.S. government fixed-price contracts, the customer pays us either performance-based payments (PBPs) or progress payments. PBPs are interim payments up to 90% of the contract price based on quantifiable measures of performance or on the achievement of specified events or milestones. Progress payments are interim payments up to 80% of costs incurred as the work progresses. Because the customer retains a portion of the contract price until completion of the contract, our U.S. government fixed-price contracts generally result in revenue recognized in excess of billings which we present as contract assets on the balance sheet. Amounts billed and due from our customers are classified as receivables on the balance sheet. The portion of the payments retained by the customer until final contract settlement is not considered a significant financing component because the intent is to protect the customer. For our U.S. government cost-type contracts, the customer generally pays us for our actual costs incurred within a short period of time. For non-U.S. government contracts, we typically receive interim payments as work progresses, although for some contracts, we may be entitled to receive an advance payment. We recognize a liability for these advance payments in excess of revenue recognized and present it as contract liabilities on the balance sheet. The advance payment typically is not considered a significant financing component because it is used to meet working capital demands that can be higher in the early stages of a contract and to protect us from the other party failing to adequately complete some or all of its obligations under the contract. To determine the proper revenue recognition method for contracts for complex aerospace or defense equipment or related services, we evaluate whether two or more contracts should be combined and accounted for as one single contract and whether the combined or single contract should be accounted for as more than one performance obligation. This evaluation requires significant judgment and the decision to combine a group of contracts or separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. For most of our contracts, the customer contracts with us to provide a significant service of integrating a complex set of tasks and components into a single project or capability (even if that single project results in the delivery of multiple units). Hence, the entire contract is accounted for as one performance obligation. Less commonly, however, we may promise to provide distinct goods or services within a contract, for example when a contract covers multiple phases of the product lifecycle (e.g., development, production, maintenance and support), in which case we separate the contract into more than one performance obligation. If a contract is separated into more than one performance obligation, we allocate the total transaction price to each performance obligation in an amount based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. We infrequently sell standard products with observable standalone sales. In cases where we do, the observable standalone sales are used to determine the standalone selling price. More frequently, we sell a customized customer specific solution, and in these cases we typically use the expected cost plus a margin approach to estimate the standalone selling price of each performance obligation. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. For certain contracts that meet the foregoing requirements, primarily international direct commercial sale contracts, we are required to obtain certain regulatory approvals. In these cases, we recognize revenue based on the likelihood of obtaining regulatory approvals based upon all known facts and circumstances. We generally recognize revenue over time as we perform on our performance obligations because of continuous transfer of control to the customer. For U.S. government contracts, this continuous transfer of control to the customer is supported by clauses in the contract that allow the customer to unilaterally terminate the contract for convenience, pay us for costs incurred plus a reasonable profit and take control of any work in process. Similarly, for non-U.S. government contracts, the customer typically controls the work in process as evidenced either by contractual termination clauses or by our rights to payment for work performed to date plus a reasonable profit to deliver products or services that do not have an alternative use to the Company. Because of control transferring over time, revenue is recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion 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 contracts because it best depicts the transfer of control to the customer which occurs as we incur costs on our contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues, including estimated fees or profits, are recorded proportionally as costs are incurred. Costs to fulfill include labor, materials and subcontractors’ costs, other direct costs and an allocation of indirect costs including pension and any other postretirement benefit (PRB) expense under U.S. government Cost Accounting Standards (CAS). Due to the nature of the work required to be performed on many of our performance obligations, the estimation of total revenue and cost at completion (the process described below in more detail) is complex, subject to many variables and requires significant judgment. It is common for our long-term contracts to contain award fees, incentive fees, or other provisions that can either increase or decrease the transaction price. These variable amounts generally are awarded upon achievement of certain performance metrics, program milestones or cost targets and can be based upon customer discretion. We estimate variable consideration at the most likely amount to which we expect to be entitled. We include estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. Contracts are often modified to account for changes in contract specifications and requirements. We consider contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of our contract modifications are for goods or services that are not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a contract modification on the transaction price and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. We have a companywide standard and disciplined quarterly Estimate at Completion (EAC) process in which management reviews the progress and execution of our performance obligations. As part of this process, management reviews information including, but not limited to, any outstanding key contract matters, progress towards completion and the related program schedule, identified risks and opportunities and the related changes in estimates of revenues and costs. The risks and opportunities include management’s judgment about the ability and cost to achieve the schedule (e.g., the number and type of milestone events), technical requirements (e.g., a newly-developed product versus a mature product) and other contract requirements. Management must make assumptions and estimates regarding labor productivity and availability, the complexity of the work to be performed, the availability of materials, the length of time to complete the performance obligation (e.g., to estimate increases in wages and prices for materials and related support cost allocations), execution 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 in the form of either offset obligations or in-country industrial participation (ICIP) agreements, required under certain contracts. These obligations may or may not be distinct depending on their nature. 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 performance obligations, if we determine we will be successful in mitigating risks surrounding the technical, schedule and cost aspects of those performance obligations or realizing related opportunities. Likewise, these adjustments may result in a decrease in operating income if we determine we will not be successful in mitigating these risks or realizing related opportunities. Changes in estimates of net sales, cost of sales and the related impact to operating income are recognized quarterly on a cumulative catch-up basis, which recognizes in the current period the cumulative effect of the changes on current and prior periods based on a performance obligation’s percentage of completion. A significant change in one or more of these estimates could affect the profitability of one or more of our performance obligations. When estimates of total costs to be incurred exceed total estimates of revenue to be earned on a performance obligation related to complex aerospace or defense equipment or related services, or product maintenance or separately priced extended warranty, a provision for the entire loss on the performance obligation is recognized in the period the loss is identified. Net EAC adjustments had the following impact on our operating results: (In millions, except per share amounts) 2018 (1) 2017 2016 Operating income $ 492 $ 442 $ 418 Income from continuing operations attributable to Raytheon Company 389 287 283 Diluted EPS from continuing operations attributable to Raytheon Company $ 1.36 $ 0.98 $ 0.95 (1) 2018 amounts reflect a U.S. statutory tax rate of 21%, which became effective in 2018 with the adoption of the Tax Cuts and Jobs Act of 2017 (2017 Act). In addition, net revenue recognized from our performance obligations satisfied in previous periods was $636 million , $520 million and $509 million in 2018 , 2017 and 2016 , respectively. This primarily relates to EAC adjustments that impacted revenue. We also sell security software through our Forcepoint segment. For the majority of these arrangements, we recognize revenue over the term of the agreement because the software requires continuous updates to provide the intended security functionality. To a lesser extent in all of our business segments, we enter into other types of contracts including service arrangements and non-subscription software and licensing agreements. We recognize revenue for these arrangements over time or at a point in time depending on our evaluation of when the customer obtains control of the promised goods or services. For software arrangements that include multiple performance obligations, including hardware, perpetual software licenses, subscriptions, term licenses and maintenance and/or services, we allocate revenue to each performance obligation based on estimates of the price that we would charge the customer for each promised product or service if it were sold on a standalone basis. Recent events have caused increased attention on U.S. defense sales to the Kingdom of Saudi Arabia (KSA). KSA represents nearly 5% of our sales and $2.2 billion of our remaining performance obligations at December 31, 2018 . Although we currently do not expect to be prevented from doing business in KSA, if government action impairs our ability to fulfill our contractual obligations or otherwise to continue to do business in KSA, it would have a material adverse effect on our financial results. Research and Development Expenses —Research and development expenses are included in general and administrative expenses in our consolidated statements of operations and have primarily been for product development for the U.S. government. Expenditures for Company-sponsored research and development projects are expensed as incurred, and were $841 million , $700 million and $725 million in 2018 , 2017 and 2016 , respectively. Customer-sponsored research and development projects performed under contracts are accounted for as contract costs as the work is performed and included in receivables, net or contract assets in our consolidated balance sheets, depending on whether costs have been billed or not. 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 provides for a U.S. tax liability on outside basis differences in our foreign subsidiaries related to amounts which have been previously taxed in the U.S. and undistributed earnings generated after December 31, 2017. This deferred tax liability generally relates to foreign currency movement and foreign withholding taxes. The Company continues to assert indefinite reinvestment on outside basis differences related to all other items, such as acquisition accounting adjustments. 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 when it is paid (recovered) or otherwise agreed as allocable with the U.S. government. Payments made for state income taxes related to Forcepoint are included in federal and foreign income tax expense. Other (Income) Expense, Net —Other (income) expense, net, consists primarily of gains and losses from our investments held in trusts used to fund certain of our non-qualified deferred compensation and employee benefit plans, gains and losses on the early repurchase of long-term debt and certain financing fees. Periodically we enter into equity method or other investments that are not related to our core operations, including investments in early stage technology companies. 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. 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. Cash and cash equivalents excludes $16 million and $12 million of restricted cash at December 31, 2018 and December 31, 2017 , respectively, which for purposes of our consolidated statements of cash flows, is included in cash, cash equivalents and restricted cash. 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 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, 2018 , we had no short-term investments as all short-term investments outstanding at December 31, 2017 matured in the first quarter of 2018. At December 31, 2017 , we had short-term investments of $297 million consisting of highly rated bank certificates of deposit with a minimum long-term debt rating of A or A2 and a minimum short-term debt rating of A-1 or P-1 . The amortized cost of these securities closely approximated their fair value. In 2017 , we recorded unrealized losses on short-term investments of less than $1 million , net of tax, in accumulated other comprehensive loss (AOCL). We did no t have any sales of short-term investments in 2018 or 2017 . For purposes of computing realized gains and losses on available-for-sale securities, we determine cost on a specific identification basis. Receivables, Net —Receivables, net, include amounts billed and currently due from customers. The amounts due are stated at their net estimated realizable value. We maintain an allowance for doubtful accounts to provide for the estimated amount of receivables 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. Contract Assets —Contract assets include unbilled amounts typically resulting from sales under long-term contracts when the cost-to-cost method of revenue recognition is utilized and revenue recognized exceeds the amount billed to the customer, and right to payment is not just subject to the passage of time. Amounts may not exceed their net realizable value. Contract assets are generally classified as current. 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) 2018 2017 Materials and purchased parts $ 75 $ 69 Work in process 662 504 Finished goods 21 21 Total $ 758 $ 594 Precontract costs are costs incurred to fulfill a contract prior to contract award. Precontract costs, including general and administrative expenses that are specifically chargeable to the customer, are deferred in inventories if we determine that the costs are probable of recovery under a specific anticipated contract. All other precontract costs, including start-up costs, are expensed as incurred. Costs that are deferred are recognized as contract costs upon the receipt of the anticipated contract. We included deferred precontract costs of $163 million and $101 million in inventories as work in process at December 31, 2018 and December 31, 2017 , respectively. Deferred Commissions — Our incremental direct costs of obtaining a contract, which consist of sales commissions primarily for our security software sales at Forcepoint, are deferred and amortized over the period of contract performance or a longer period, generally the estimated life of the customer relationship, if renewals are expected and the renewal commission is not commensurate with the initial commission. We classify deferred commissions as current or noncurrent based on the timing of when we expect to recognize the expense. The current and noncurrent portions of deferred commissions are included in prepaid expenses and other current assets, and other assets, net, respectively, in our consolidated balance sheets. At December 31, 2018 and December 31, 2017 , we had deferred commissions of $55 million and $37 million , respectively. Amortization expense related to deferred commissions was $45 million , $28 million and $12 million in 2018 , 2017 and 2016 , respectively. 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 lease term 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 2018 , 2017 and 2016 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 group, the asset group 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. Contract Liabilities —Our contract liabilities consist of advance payments and billings in excess of revenue recognized and deferred revenue. We may also receive up-front payments related to software license sales primarily for Forcepoint, which in most cases we recognize ratably over the license term. Our contract assets and liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. We classify advance payments and billings in excess of revenue recognized as current, and deferred revenue as current or noncurrent based on the timing of when we expect to recognize revenue. The noncurrent portion of deferred revenue is included in accrued retiree benefits and other long-term liabilities in our consolidated balance sheets. In order to determine revenue recognized in the period from contract liabilities, we first allocate revenue to the individual contract liability balance outstanding at the beginning of the period until the revenue exceeds that balance. If additional advances are received on those contracts in subsequent periods, we assume all revenue recognized in the reporting period first applies to the beginning contract liability as opposed to a portion applying to the new advances for the period. 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), other changes in accumulated other comprehensive income (loss) and additional contributions. Adjustments to the redemption value over the period from the date of acquisition to the redemption date are immediately recorded to retained earnings. We reflect the redemption value adjustments in the earnings per share (EPS) calculation if redemption value is in excess of the fair value of noncontrolling interest which resulted in a $0.01 favorable impact to both basic and diluted EPS in 2018 and a $0.01 unfavorable impact to both basic and diluted EPS in 2016 . There was no impact to basic or diluted EPS in 2017 related to the redemption value adjustments. Other Comprehensive Income (Loss) —Other comprehensive income (loss) includes gains and losses associated with pension and PRB , foreign exchange translation adjustments, the effective portion of gains and losses on derivative instruments qualified as cash flow hedges, and unrealized gains (losses) on available-for-sale investments . The computation of other comprehensive income (loss) and its components are presented in the consolidated statements of comprehensive income. A rollforward of accumulated other comprehensive income (loss) was as follows: Pension and PRB plans, net (1) Foreign exchange translation Cash flow hedges (2) Unrealized gains (losses) on investments and other, net (3) Total (In millions) Balance at December 31, 2015 $ (7,088 ) $ (60 ) $ (16 ) $ (12 ) $ (7,176 ) Before tax amount (203 ) (115 ) 25 15 (278 ) Tax (expense) benefit 57 — (9 ) (5 ) 43 Net of tax amount (146 ) (115 ) 16 10 (235 ) Balance at December 31, 2016 (7,234 ) (175 ) — (2 ) (7,411 ) Before tax amount (651 ) 80 10 (1 ) (562 ) Tax (expense) benefit 42 — (4 ) — 38 Net of tax amount (609 ) 80 6 (1 ) (524 ) Balance at December 31, 2017 (7,843 ) (95 ) 6 (3 ) (7,935 ) Before tax amount 1,028 (36 ) (12 ) 1 981 Tax (expense) benefit (216 ) — 3 — (213 ) Net of tax amount 812 (36 ) (9 ) 1 768 Reclassification of stranded tax effects (1,452 ) — 1 — (1,451 ) Balance at December 31, 2018 $ (8,483 ) $ (131 ) $ (2 ) $ (2 ) $ (8,618 ) (1) Pension and PRB plans, net, is shown net of cumulative tax benefits of $2,255 million and $3,923 million at December 31, 2018 and December 31, 2017 , respectively. (2) Cash flow hedges are shown net of cumulative tax benefit of $1 million and tax expense of $3 million at December 31, 2018 and December 31, 2017 , respectively. (3) Unrealized gains (losses) on investments and other, net, are shown net of cumulative tax expense of $1 million at both December 31, 2018 and December 31, 2017 . On December 22, 2017, the President signed the 2017 Act, which reduced the U.S. corporate statutory federal tax rate to 21% for 2018. At December 31, 2017 the deferred tax amounts recorded through other comprehensive income prior to the enactment date using the prior 35% statutory tax rate remained in other comprehensive income despite the fact that the related deferred tax assets and liabilities were remeasured to reflect the newly enacted tax rate of 21%. These are referred to as stranded tax effects. Under Accounting Standards Update (ASU) 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income , we elected to reclassify these stranded tax effects from AOCL to retained earnings in the first quarter of 2018. See Accounting Standards, below, for additional details. After the enactment date, any deferred tax amounts recorded to other comprehensive income are recorded at the 21% tax rate. The income tax effects remaining in AOCL will be released into earnings as the related before tax amounts are reclassified to earnings. Other material amounts reclassified out of AOCL related to the amortization of net actuarial loss associated with our pension plans were $1,351 million , $1,177 million and $999 million before tax in 2018 , 2017 and 2016 , 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. We expect $3 million net of tax of net unrealized losses on our cash flow hedges at December 31, 2018 to be reclassified into earnings at then-current values over the next 12 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. Prior to the enactment of the

Earnings Per Share (EPS)

Earnings Per Share (EPS)	12 Months Ended
	Dec. 31, 2018
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: 2018 2017 2016 Basic EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 3.46 $ 3.18 $ 2.92 Undistributed earnings 6.70 3.77 4.63 Total $ 10.16 $ 6.95 $ 7.55 Diluted EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 3.45 $ 3.18 $ 2.92 Undistributed earnings 6.70 3.76 4.63 Total $ 10.15 $ 6.94 $ 7.55 Income attributable to participating securities was as follows: (In millions) 2018 2017 2016 Income from continuing operations attributable to participating securities $ 30 $ 24 $ 30 Income (loss) from discontinued operations, net of tax attributable to participating securities — — — Net income attributable to participating securities $ 30 $ 24 $ 30 The weighted-average shares outstanding for basic and diluted EPS were as follows: (In millions) 2018 2017 2016 Shares for basic EPS (1) 286.5 291.1 296.5 Effect of dilutive securities 0.3 0.3 0.3 Shares for diluted EPS 286.8 291.4 296.8 (1) Includes participating securities of 2.9 million , 3.5 million and 4.0 million for 2018 , 2017 and 2016 , respectively. 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, 2018 or December 31, 2017

Acquisitions, Divestitures and

Acquisitions, Divestitures and Goodwill	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions, Divestitures and Goodwill	Acquisitions, Divestitures and Goodwill In pursuing our business strategies, we acquire and make investments in certain businesses that meet strategic and financial criteria , and divest of certain non-core businesses, investments and assets when appropriate. In May 2018, we completed the sale of our commercial cloud-based call center analytics solutions business for $11 million in cash, net of transaction-related costs. This business was part of our Space and Airborne Systems (SAS) segment. The Company recognized a gain of $8 million before tax, $5 million net of tax, which was recorded as a reduction to cost of sales at our SAS segment in the second quarter of 2018. In 2017, our Forcepoint business completed the acquisitions of RedOwl Analytics Inc., a security analytics business, and the Skyfence cloud access security broker (CASB) business for total consideration of $93 million , net of cash received, and exclusive of retention payments. Vista Equity Partners contributed 19.7% of the purchase price for the Skyfence acquisition. Both acquisitions expand and enhance Forcepoint’s strategy to deliver cybersecurity systems that help customers understand people’s behaviors and intent as they interact with data and intellectual property wherever it may reside. In connection with these acquisitions, we recorded $77 million of goodwill, primarily related to expected synergies from combining operations and the value of the existing workforce, and $12 million of intangible assets, primarily related to technology and customer relationships . In 2016, our Forcepoint business acquired the Stonesoft next-generation firewall (NGFW) business, including the Sidewinder proxy firewall technology, and Vista Equity Partners contributed 19.7% of the purchase price. Stonesoft expands the cloud and hybrid capabilities of Forcepoint. In connection with this acquisition, we recorded $51 million of goodwill, primarily related to expected synergies from combining operations and the value of the existing workforce, and $23 million of intangible assets, primarily related to technology and customer relationships . 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 $62 million at December 31, 2018 . A rollforward of goodwill by segment was as follows: (In millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint (1) Total Balance at December 31, 2016 $ 1,702 $ 2,966 $ 4,154 $ 4,106 $ 1,860 $ 14,788 Acquisitions and divestitures — — — — 77 77 Effect of foreign exchange rates and other 4 1 — — 1 6 Balance at December 31, 2017 1,706 2,967 4,154 4,106 1,938 14,871 Acquisitions and divestitures — — — (3 ) — (3 ) Effect of foreign exchange rates and other (2 ) (2 ) — — — (4 ) Balance at December 31, 2018 $ 1,704 $ 2,965 $ 4,154 $ 4,103 $ 1,938 $ 14,864 (1) At December 31, 2018 , Forcepoint’s fair value was estimated to exceed its net book value by approximately $1 billion . As discussed in “Note 11: Forcepoint Joint Venture,” we are required to determine Forcepoint’s fair value on a quarterly basis due to the accounting related to the redeemable noncontrolling interest.

Thales-Raytheon Systems Co. Ltd

Thales-Raytheon Systems Co. Ltd. (TRS) Joint Venture	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Thales-Raytheon Systems Co. Ltd (TRS) Joint Venture	Thales-Raytheon Systems Co. Ltd. (TRS) Joint Venture In 2001, we formed the TRS joint venture with Thales S.A. through our Integrated Defense Systems (IDS) segment. The TRS joint venture involved three operating companies, one of which, Raytheon Command and Control Solutions LLC (RCCS LLC), we controlled and consolidated, 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), we accounted for using the equity method through our investment in TRS. In 2016, Thales S.A. and Raytheon amended and restated the TRS joint venture agreement to reduce the arrangement to TRS AMDC2 only and limit its scope to NATO-only business opportunities involving air command and control systems, theatre missile defense and ballistic missile defense. As a result, we acquired Thales S.A.’s noncontrolling interest in RCCS LLC and sold our equity method investment in TRS SAS for a net cash payment to Thales S.A. of $90 million , which was classified as a financing activity in our consolidated statements of cash flows. We recorded our acquisition of RCCS LLC at fair value, which resulted in a reduction to equity of $167 million before tax, $197 million after tax, and the sale of TRS SAS at fair value, which resulted in a tax-free gain of $158 million

Receivables, Net

Receivables, Net	12 Months Ended
	Dec. 31, 2018
Contracts Receivable [Abstract]
Receivables, Net	Receivables, Net Receivables, net, consisted of the following at December 31: (In millions) 2018 2017 U.S. government contracts (including foreign military sales) $ 1,121 $ 881 Other customers 539 451 Allowance for doubtful accounts (12 ) (8 ) Total receivables, net $ 1,648 $ 1,324

Contract Assets and Contract Li

Contract Assets and Contract Liabilities	12 Months Ended
	Dec. 31, 2018
Contract with Customer, Asset and Liability [Abstract]
Contract Assets and Contract Liabilities	Contract Assets and Contract Liabilities Net contract assets (liabilities) consisted of the following at December 31: (In millions) 2018 2017 $ Change % Change Contract assets $ 5,594 $ 5,247 $ 347 6.6 % Contract liabilities—current (3,309 ) (2,927 ) (382 ) 13.1 % Contract liabilities—noncurrent (150 ) (127 ) (23 ) 18.1 % Net contract assets (liabilities) $ 2,135 $ 2,193 $ (58 ) (2.6 )% Total net contract assets (liabilities) was relatively consistent from December 31, 2017 to December 31, 2018 . Included in the change in total net contract assets (liabilities) was a $382 million increase in our current contract liabilities driven principally by billings in excess of revenue recognized on certain international programs with milestone payments, partially offset by a $347 million increase in our contract assets, principally due to the timing of pending approvals on direct commercial sales contracts for precision guided munitions to certain Middle Eastern customers. For direct commercial sales contracts for which we are required to obtain regulatory approvals, we recognize revenue based on the likelihood of obtaining such approvals. At December 31, 2018 , we had approximately $2.3 billion of total contract value, recognized approximately $1 billion of sales for work performed to date and received approximately $850 million in advances on contracts for precision guided munitions to certain Middle Eastern customers for which U.S. government approval is pending. On a contract by contract basis, and excluding advances billed but not received, we had $500 million and $350 million of net contract assets and net contract liabilities, respectively, related to these contracts. Impairment losses recognized on our receivables and contract assets were de minimis in 2018 , 2017 and 2016 . Contract assets consisted of the following at December 31: (In millions) 2018 2017 U.S. government contracts (including foreign military sales): Unbilled $ 10,651 $ 10,748 Progress payments (6,338 ) (6,637 ) 4,313 4,111 Other customers: Unbilled 1,407 1,368 Progress payments (126 ) (232 ) 1,281 1,136 Total contract assets $ 5,594 $ 5,247 The U.S. government has title to the assets related to unbilled amounts on contracts that provide progress payments. Included in contract assets at December 31, 2018 was $13 million which is expected to be collected outside of one year. Contract assets include retentions arising from contractual provisions. At December 31, 2018 , retentions were $103 million . We anticipate collecting $20 million of these retentions in 2019 and the balance thereafter. In 2018 , 2017 and 2016 , we recognized revenue of $1,453 million , $1,434 million and $1,403 million related to our contract liabilities at January 1, 2018 , January 1, 2017 and January 1, 2016

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2018
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) 2018 2017 Land $ 84 $ 85 Buildings and improvements 2,835 2,567 Machinery and equipment 4,844 4,621 Property, plant and equipment, gross 7,763 7,273 Accumulated depreciation and amortization (4,923 ) (4,834 ) Total $ 2,840 $ 2,439 Depreciation and amortization expense of property, plant and equipment, net, was $374 million , $350 million and $316 million in 2018 , 2017 and 2016

Other Assets, Net

Other Assets, Net	12 Months Ended
	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Assets, Net	Other Assets, Net Other assets, net, consisted of the following at December 31: (In millions) 2018 2017 Marketable securities held in trust (1) $ 642 $ 633 Computer software, net of accumulated amortization of $1,201 and $1,150 at December 31, 2018 and 2017, respectively 261 288 Other intangible assets, net of accumulated amortization of $760 and $652 at December 31, 2018 and 2017, respectively 361 481 Deferred tax asset (2) 331 537 Other noncurrent assets, net 429 285 Total $ 2,024 $ 2,224 (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 $75 million , $71 million and $68 million in 2018 , 2017 and 2016 , respectively. Other intangible assets, net, consisted primarily of completed technology, intellectual property and acquired customer relationships. 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 $119 million , $129 million and $131 million in 2018 , 2017 and 2016 , respectively. Computer software and other intangible asset amortization expense is expected to be approximately $174 million in 2019 , $135 million in 2020 , $99 million in 2021 , $59 million in 2022 and $27 million in 2023

Commercial Paper and Long-term

Commercial Paper and Long-term Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Commercial Paper and Long-term Debt	Commercial Paper and Long-term Debt Commercial Paper —At December 31, 2018 , short-term commercial paper borrowings outstanding were $300 million , which had a weighted-average interest rate and original maturity period of 2.954% and 16 days , respectively. At December 31, 2017 , short-term commercial paper borrowings outstanding were $300 million , which had a weighted-average interest rate and original maturity period of 1.583% and 20 days , respectively. The commercial paper notes outstanding have original maturities of not more than 90 days from the date of issuance. Long-term Debt —Long-term debt consisted of the following at December 31: (In millions, except percentages) 2018 2017 $500 notes due 2020, 4.40% $ 499 $ 499 $1,000 notes due 2020, 3.125% 998 996 $1,100 notes due 2022, 2.50% 1,096 1,095 $300 notes due 2024, 3.15% 298 297 $382 notes due 2027, 7.20% 373 372 $185 notes due 2028, 7.00% 185 185 $600 notes due 2040, 4.875% 592 592 $425 notes due 2041, 4.70% 419 419 $300 notes due 2044, 4.20% 295 295 Total debt issued and outstanding $ 4,755 $ 4,750 The notes are redeemable by us at any time at redemption prices based on U.S. Treasury rates. In the second quarter of 2017, we exercised our call rights to repurchase, at prices based on fixed spreads to the U.S. Treasury rates , $591 million of our long-term debt due March and December 2018 at a loss of $39 million before tax, $25 million net of tax, which is included in other (income) expense, net . The carrying value of long-term debt is recorded at amortized cost. The fair value of long-term debt is 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) 2018 2017 Fair value of long-term debt $ 5,063 $ 5,293 The adjustments to the principal amounts of long-term debt were as follows at December 31: (In millions) 2018 2017 Principal $ 4,792 $ 4,792 Unamortized issue discounts (30 ) (34 ) Unamortized interest rate lock costs (7 ) (8 ) Total $ 4,755 $ 4,750 The aggregate amounts of principal payments due on long-term debt for the next five years are: (In millions) 2019 $ — 2020 1,500 2021 — 2022 1,100 2023 — Thereafter 2,192 In November 2015, we entered into a $1.25 billion revolving credit facility maturing in November 2020. 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, 2018 , 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, 2018 and December 31, 2017 there were no borrowings or letters of credit outstanding under this credit facility. The $300 million of commercial paper outstanding at December 31, 2018 reduced the amount available under our credit facility to $950 million . Under the $1.25 billion credit facility 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 as of December 31, 2018 and December 31, 2017 . Our ratio of total debt to total capitalization, as those terms are defined in the credit facility, was 30.6% at December 31, 2018 . We are providing this ratio as this metric is used by our lenders to monitor our leverage and is also a threshold that could limit our ability to utilize this facility. Total cash paid for interest on commercial paper and long-term debt was $194 million , $214 million and $231 million in 2018 , 2017 and 2016

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Leases —At December 31, 2018 , we had commitments under long-term leases requiring annual rentals on a net lease basis as follows: (In millions) 2019 $ 215 2020 181 2021 157 2022 121 2023 85 Thereafter 200 Rent expense was $232 million , $229 million and $239 million in 2018 , 2017 and 2016 , 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. 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 regularly assess the probability of recovery of these costs, which requires us to make assumptions about the extent of cost recovery under our contracts and the amount of future contract activity. 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 prepaid expenses and other current assets, in our consolidated balance sheets. Our estimates regarding remediation costs to be incurred were as follows at December 31: (In millions, except percentages) 2018 2017 Total remediation costs—undiscounted $ 193 $ 206 Weighted-average discount rate 5.1 % 5.2 % Total remediation costs—discounted $ 128 $ 142 Recoverable portion 82 92 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) 2019 $ 31 2020 15 2021 12 2022 11 2023 11 Thereafter 113 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 for us or our affiliates. These instruments expire on various dates through 2028. 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) 2018 2017 Guarantees $ 201 $ 216 Letters of credit 2,503 2,416 Surety bonds 166 166 All guarantees at December 31, 2018 and December 31, 2017 related to our joint venture in TRS AMDC2. We provide these guarantees, as well as letters of credit, to TRS AMDC2 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 AMDC2 and other affiliates failing to meet their obligations described above. At December 31, 2018 , we believe the risk that TRS AMDC2 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, 2018 . At December 31, 2018 and December 31, 2017 , we had an estimated liability of $3 million and $2 million , respectively, related to these guarantees. As discussed in “Note 11: 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 in the form of either offset agreements or ICIP agreements, as a condition to obtaining orders for our products and services from certain customers in foreign countries. At December 31, 2018 , the aggregate amount of our offset agreements, both agreed to and anticipated to be agreed to, had an outstanding notional value of approximately $9.7 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. Historically, we have not been required to pay any penalties of significance. 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 Inspectors General of the U.S. Department of Defense (DoD) and other departments and agencies; the Government Accountability Office (GAO); the Department of Justice (DOJ); and Congressional Committees. Other areas of our business operations may also be subject to audit and investigation by these and/or other agencies. From time to time, agencies investigate or conduct audits to determine whether our operations are being conducted in accordance with applicable requirements. Such investigations and audits may be initiated due to a number of reasons, including as a result of a whistleblower complaint. 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 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 or other incurred costs. We do not expect any insurance recovery to have a material impact on the financial exposure that could result from these matters.

Forcepoint Joint Venture

Forcepoint Joint Venture	12 Months Ended
	Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Forcepoint Joint Venture	Forcepoint Joint Venture Forcepoint is a cybersecurity joint venture company with Vista Equity Partners. 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, which became exercisable on May 29, 2017. The put option allows Vista Equity Partners to 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, Raytheon has the option, which became exercisable on May 29, 2018, 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. The joint venture agreement provides for the process under which the parties would determine the fair value of the interest and could result in a payment by Raytheon shortly after the exercise of Vista Equity Partners’ put option or Raytheon’s purchase option; however, the ultimate timing will depend on the actions of the parties and other factors. The estimate of fair value for purposes of presenting the redeemable noncontrolling interest in our consolidated balance sheets could differ from the parties’ determination of fair value for the interest under the joint venture agreement. Vista Equity Partners’ adjusted equity interest in the Forcepoint joint venture was 19.5% at December 31, 2018 . Vista Equity Partners’ interest in Forcepoint is presented as redeemable noncontrolling interest, outside of stockholders’ equity, in our consolidated balance sheets. The redeemable noncontrolling interest is recognized at the greater of the estimated redemption value as of the balance sheet date, which was $411 million at December 31, 2018 , or the carrying value, which was $281 million at December 31, 2018 . A rollforward of redeemable noncontrolling interest was as follows: (In millions) 2018 2017 Beginning balance $ 512 $ 449 Net income (loss) (27 ) (23 ) Other comprehensive income (loss), net of tax (1) (1 ) — Contribution from noncontrolling interest — 8 Adjustment of noncontrolling interest to redemption value (73 ) 78 Ending balance $ 411 $ 512 (1) Other comprehensive income (loss), net of tax, was income of less than $1 million in 2017

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity The changes in shares of our common stock outstanding were as follows: (In millions) 2018 2017 2016 Beginning balance 288.4 292.8 299.0 Stock plans activity 0.9 1.1 1.5 Share repurchases (7.2 ) (5.5 ) (7.7 ) Ending balance 282.1 288.4 292.8 From time to time, our Board of Directors authorizes the repurchase of shares of our common stock. In November 2015, our Board authorized the repurchase of up to $2.0 billion of our outstanding common stock. In November 2017, our Board also authorized the repurchase of up to $2.0 billion of our outstanding common stock. At December 31, 2018 , we had approximately $1.5 billion available under the 2017 repurchase program. 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 and LTPP awards issued to employees. Due to the volume of repurchases made under our share repurchase program, additional paid-in capital was reduced to zero in both 2018 and 2017 , with the remainder of the excess purchase price over par value of $1,250 million and $724 million recorded as a reduction to retained earnings in 2018 and 2017 , respectively. Our share repurchases were as follows: 2018 2017 2016 (In millions) $ Shares $ Shares $ Shares Shares repurchased under our share repurchase programs $ 1,325 6.7 $ 800 4.9 $ 900 6.9 Shares repurchased to satisfy tax withholding obligations 93 0.5 85 0.6 96 0.8 Total share repurchases $ 1,418 7.2 $ 885 5.5 $ 996 7.7 In March 2018 , our Board of Directors authorized an 8.8% increase to our annual dividend payout rate from $3.19 to $3.47 per share. Our Board of Directors declared dividends of $3.47 , $3.19 and $2.93 per share in 2018 , 2017 and 2016 , respectively. Dividends are subject to quarterly approval by our Board of Directors. As further discussed in “Note 4: Thales-Raytheon Systems Co. Ltd. (TRS) Joint Venture,” in 2016, we recorded our acquisition of Thales S.A.’s noncontrolling interest in RCCS LLC at fair value, which resulted in a reduction to retained earnings of $167 million before tax, $197 million after tax. The $30 million

Stock-based Compensation Plans

Stock-based Compensation Plans	12 Months Ended
	Dec. 31, 2018
Share-based Compensation [Abstract]
Stock-based Compensation Plans	Stock-based Compensation Plans The Raytheon 2010 Stock Plan provides for stock-based awards 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 to fulfill the stock-based awards. 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 (MDCC) of our Board of Directors and are compensatory in nature, while awards to our non-employee directors are made by the Board’s Governance and Nominating Committee. Shares issued to fulfill the stock-based awards will be funded through the issuance of shares under the 2010 Stock Plan. At December 31, 2018 , there were 6.0 million shares available for new awards and 3.1 million shares outstanding. Stock-based compensation expense and the associated tax benefit recognized were as follows: (In millions) 2018 2017 2016 Stock-based compensation expense Restricted stock expense $ 98 $ 94 $ 96 RSU expense 32 28 26 LTPP expense 36 38 29 Total stock-based compensation expense $ 166 $ 160 $ 151 Stock-based tax benefit recognized 29 30 46 At December 31, 2018 , there was $179 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 Shares of restricted stock vest over a specified period of time as determined by the MDCC, generally four years for employee awards and one year for non-employee directors. Recipients of restricted stock are entitled to full dividend and voting rights beginning on the date of grant. Non-vested shares of restricted stock are subject to forfeiture under certain circumstances and restricted as to disposition until vested. At the date of grant, each share of restricted stock is credited to common stock at par value. The fair value of restricted stock is calculated under the intrinsic value method at the date of grant and 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. The expense is based on the fair value of the RSUs, calculated under the intrinsic value method at the date of grant. Restricted stock and RSU activity was as follows: Shares/units (in thousands) Weighted-average grant date fair value per share Outstanding at December 31, 2015 3,740 $ 87.57 Granted 1,128 124.08 Vested (1,407 ) 71.09 Forfeited (167 ) 98.61 Outstanding at December 31, 2016 3,294 106.56 Granted 1,025 152.93 Vested (1,194 ) 91.77 Forfeited (229 ) 120.33 Outstanding at December 31, 2017 2,896 127.98 Granted 774 212.96 Vested (977 ) 112.54 Forfeited (215 ) 150.67 Outstanding at December 31, 2018 2,478 $ 158.66 The total fair value of restricted stock and RSUs vested and the related tax benefit realized were as follows: (In millions) 2018 2017 2016 Fair value of restricted stock and RSUs vested $ 206 $ 193 $ 183 Tax benefit realized related to vested restricted stock/RSUs (1) 39 63 64 (1) Includes $18 million , $29 million and $32 million of excess tax benefits realized in 2018 , 2017 and 2016 , respectively. Long-term Performance Plan 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 LTPP 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 LTPP 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, 2018 are independent of each other and based on three metrics, as defined in the LTPP 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% . The ultimate award, which is determined at the end of the three-year cycle, can range from zero to 200% of the target award and includes dividend equivalents, which are not included in the aggregate target award numbers. Compensation expense for the LTPP 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 LTPP award and the Monte Carlo simulation method for the TSR portion of the LTPP 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 LTPP awards granted during each year were as follows: 2018 2017 2016 Expected stock price volatility 16.87 % 18.74 % 18.60 % Peer group stock price volatility 18.41 % 20.01 % 20.06 % Correlations of returns 52.49 % 56.55 % 58.05 % Risk free interest rate 2.21 % 1.53 % 1.08 % LTPP award activity was as follows (1) : Units (in thousands) Weighted-average grant date fair value per share Outstanding at December 31, 2015 915 $ 80.83 Granted 167 123.31 Increase due to expected performance 205 89.62 Vested (590 ) 61.38 Forfeited (32 ) 105.52 Outstanding at December 31, 2016 665 110.32 Granted 142 152.29 Increase due to expected performance 193 125.14 Vested (273 ) 97.59 Forfeited (4 ) 137.57 Outstanding at December 31, 2017 723 127.16 Granted 117 205.76 Increase due to expected performance 71 135.27 Vested (303 ) 112.15 Forfeited (24 ) 164.58 Outstanding at December 31, 2018 584 $ 150.15 (1) This table excludes dividend equivalent units outstanding of 33 thousand at December 31, 2018 and 28 thousand at both December 31, 2017 and December 31, 2016 , based on expected performance at each reporting date. The total fair value of LTPP awards vested and the related tax benefit realized were as follows: (In millions) 2018 2017 2016 Fair value of LTPP awards vested $ 67 $ 44 $ 77 Tax benefit realized related to vested LTPP awards (1) 24 15 27 (1) Includes $13 million , $7 million and $15 million of excess tax benefits realized in 2018 , 2017 and 2016 , respectively. Forcepoint Plans In 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 2018 , Forcepoint issued 8 thousand unit appreciation rights, 3 thousand were forfeited, and had 21 thousand outstanding at December 31, 2018 . Also in 2018 , Forcepoint issued 29 thousand profits interests, 15 thousand were forfeited, and had 116 thousand outstanding at December 31, 2018 . At December 31, 2018 , there were 174 thousand and 35 thousand combined unit appreciation rights and/or profits interests authorized and available for issuance, respectively, under these plans. 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. In certain limited circumstances other vesting conditions may apply and the impact attributable to these vesting conditions was income of $1 million in 2018 and expense of $13 million and $10 million in 2017 and 2016 , respectively. The weighted-average assumptions used in the Black-Scholes model and the weighted-average grant date fair value for the Forcepoint awards granted were as follows: 2018 2017 2016 Unit Price $ 1,508.01 $ 1,101.31 $ 935.28 Expected life (in years) 3.01 2.29 4.24 Expected unit price volatility 43.66 % 49.51 % 54.65 % Risk free interest rate 2.69 % 1.46 % 1.12 % Dividend yield — % — % — % Grant date fair value $ 486.94 $ 339.72 $ 402.64

Pension and Other Employee Bene

Pension and Other Employee Benefits	12 Months Ended
	Dec. 31, 2018
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
Pension and Other Employee Benefits	Pension and Other Employee Benefits We have pension plans covering the majority of our employees hired prior to January 1, 2007, including certain employees in foreign countries (Pension Benefits). Our primary pension obligations relate to our domestic Internal Revenue Service (IRS) qualified pension plans. In addition, we 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) 2018 2017 Domestic Pension Benefits plan $ 18,488 $ 20,075 Foreign Pension Benefits plan 833 927 We maintain a defined contribution plan that includes a 401(k) plan. Covered employees hired or rehired on or 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, subject to IRS compensation and contribution limits. We match the employee contributions. The match is generally 3% or 4% of the employee’s pay and is invested in the same way as the employee contributions. Total expense for our contributions was $326 million , $303 million and $286 million in 2018 , 2017 and 2016 , respectively. At December 31, 2018 and December 31, 2017 , there was $17.0 billion and $18.4 billion invested in our defined contribution plan, respectively. At December 31, 2018 and December 31, 2017 , $1.6 billion and $2.1 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) 2018 2017 Marketable securities held in trust $ 642 $ 633 Included in marketable securities held in trust in the table above was $420 million and $410 million at December 31, 2018 and December 31, 2017 , respectively, related to the nonqualified defined contribution plans. The liabilities related to the nonqualified defined contribution plans were $431 million and $422 million at December 31, 2018 and December 31, 2017 , respectively. We also maintain additional contractual pension benefits agreements for certain executive officers. The liability associated with such agreements was $36 million and $38 million at December 31, 2018 and December 31, 2017 , 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 of 2006 (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. Due to the low interest rate environment, Congress provided for temporary pension funding relief through a provision in the Surface Transportation Extension Act of 2012 (STE Act). The provision was extended through 2020 by the Highway and Transportation Funding Act of 2014 (HATFA) and the Bipartisan Budget Act (BBA) of 2015. 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. Beginning after 2020, the provision will be gradually phased out. We made the following contributions to our pension and PRB plans during the years ended December 31: (In millions) 2018 2017 2016 Required pension contributions $ 889 $ 615 $ 145 Discretionary pension contributions 1,250 1,000 500 PRB contributions 22 27 25 Total $ 2,161 $ 1,642 $ 670 We periodically evaluate whether to make additional discretionary contributions. We made a $1.25 billion discretionary pension contribution in third quarter 2018 and have elected to apply approximately $1 billion to partially offset required contributions in 2019 and 2020, roughly split evenly between the two years. We expect to make required contributions of approximately $356 million and $30 million to our pension and PRB plans, respectively, in 2019 . 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 2019 $ 2,008 $ 61 2020 1,878 60 2021 1,818 58 2022 1,744 55 2023 1,599 53 Thereafter (next 5 years) 7,612 231 Defined Benefit Retirement Plan Summary Financial Information The tables below outline the components of net periodic benefit expense (income) of our domestic and foreign Pension Benefits and PRB plans. Pension Benefits Components of Net Periodic Pension Expense (Income) (in millions) 2018 2017 2016 Operating expense Service cost $ 504 $ 473 $ 482 Non-operating expense Interest cost 1,004 1,088 1,089 Expected return on plan assets (1,435 ) (1,377 ) (1,505 ) Amortization of prior service cost 6 5 5 Amortization of net actuarial loss 1,351 1,177 999 Loss recognized due to settlements 286 1 3 Total pension non-service expense 1,212 894 591 Net periodic pension expense (income) $ 1,716 $ 1,367 $ 1,073 Net periodic pension expense (income) includes income from foreign Pension Benefits plans of $8 million in 2018 , expense of $2 million in 2017 and income of $4 million in 2016 . In July 2018, certain Raytheon-sponsored pension plans purchased a group annuity contract from an insurance company to transfer $923 million of our outstanding pension benefit obligations related to certain U.S. retirees and beneficiaries of our previously discontinued operations. As a result of the transaction, the insurance company is now required to pay and administer the retirement benefits owed to the approximately 13,000 U.S. retirees and beneficiaries, with no change to their monthly retirement benefit payment amounts. In connection with this transaction, in the third quarter of 2018 we recognized a non-cash pension settlement charge of $288 million before tax, $228 million net of tax, in non-operating (income) expense, net, primarily related to the accelerated recognition of actuarial losses included in AOCL for those plans. PRB Components of Net Periodic PRB Expense (Income) (in millions) 2018 2017 2016 Operating expense Service cost $ 5 $ 6 $ 6 Non-operating expense Interest cost 27 30 31 Expected return on plan assets (21 ) (21 ) (25 ) Amortization of prior service cost — (1 ) (1 ) Amortization of net actuarial loss 11 10 3 Loss recognized due to settlements 1 1 2 Total PRB non-service expense 18 19 10 Net periodic PRB expense (income) $ 23 $ 25 $ 16 Pension Benefits PRB Funded Status – Amounts Recognized on our Balance Sheets (in millions) December 31: 2018 2017 2018 2017 Noncurrent assets $ 126 $ 112 $ — $ — Current liabilities (150 ) (164 ) (18 ) (19 ) Noncurrent liabilities (6,111 ) (7,515 ) (354 ) (368 ) Net amount recognized on our balance sheets $ (6,135 ) $ (7,567 ) $ (372 ) $ (387 ) Pension Benefits PRB Reconciliation of Amounts Recognized on our Balance Sheets (in millions) December 31: 2018 2017 2018 2017 Accumulated other comprehensive loss: Prior service (cost) credit $ (27 ) $ (22 ) $ — $ — Net loss (10,590 ) (11,607 ) (121 ) (137 ) Accumulated other comprehensive loss (10,617 ) (11,629 ) (121 ) (137 ) Accumulated contributions in excess (below) net periodic benefit or cost 4,482 4,062 (251 ) (250 ) Net amount recognized on our balance sheets $ (6,135 ) $ (7,567 ) $ (372 ) $ (387 ) Pension Benefits PRB Sources of Change in Accumulated Other Comprehensive Loss (in millions) 2018 2017 2018 2017 Prior service (cost) credit arising during period $ (10 ) $ (15 ) $ — $ — Amortization of prior service cost (credit) included in net income 6 5 — (1 ) Net change in prior service (cost) credit not recognized in net income during the period (4 ) (10 ) — (1 ) Actuarial gain (loss) arising during period (630 ) (1,796 ) 4 (20 ) Amortization of net actuarial (gain) loss 1,351 1,177 11 10 Loss recognized due to settlements 286 2 1 1 Net change in actuarial gain (loss) not included in net income during the period 1,007 (617 ) 16 (9 ) Effect of exchange rates 9 (14 ) — — Total change in accumulated other comprehensive loss during period $ 1,012 $ (641 ) $ 16 $ (10 ) The amounts in AOCL at December 31, 2018 expected to be recognized as components of net periodic pension or PRB expense in 2019 are as follows: (In millions) Pension Benefits PRB Amortization of net actuarial gain (loss) $ (1,092 ) $ (10 ) Amortization of prior service (cost) credit (5 ) — Total $ (1,097 ) $ (10 ) 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) 2018 2017 PBO for domestic qualified pension plans $ 23,359 $ 26,150 ABO for domestic qualified pension plans 21,595 24,122 Asset values for domestic qualified pension plans 18,488 20,075 The PBO and fair value of plans assets for Pension Benefits plans with PBOs in excess of plan assets were $24,561 million and $18,300 million , respectively, at December 31, 2018 and $27,084 million and $19,405 million , respectively, at December 31, 2017 . The ABO and fair value of plan assets for Pension Benefits plans with ABOs in excess of plan assets were $22,554 million and $18,300 million , respectively, at December 31, 2018 and $24,795 million and $19,405 million , respectively, at December 31, 2017 . The ABO for all Pension Benefits plans was $23,447 million and $26,276 million at December 31, 2018 and December 31, 2017 , 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. Pension Benefits PRB Change in Projected Benefit Obligation (in millions) 2018 2017 2018 2017 PBO at beginning of year $ 28,569 $ 25,787 $ 745 $ 737 Service cost 504 473 5 6 Interest cost 1,004 1,088 27 30 Plan participants’ contributions 6 8 49 35 Amendments 10 15 — — Plan settlements (474 ) (5 ) (10 ) (9 ) Actuarial loss (gain) (1,580 ) 3,085 (39 ) 41 Foreign exchange loss (gain) (56 ) 78 — — Benefits paid (2,527 ) (1,960 ) (105 ) (95 ) PBO at end of year $ 25,456 $ 28,569 $ 672 $ 745 The PBO for our domestic and foreign Pension Benefits plans was $24,656 million and $800 million , respectively, at December 31, 2018 and $27,661 million and $908 million , respectively, at December 31, 2017 . Pension Benefits PRB Change in Plan Assets (in millions) 2018 2017 2018 2017 Fair value of plan assets at beginning of year $ 21,002 $ 18,605 $ 358 $ 360 Actual return (loss) on plan assets (775 ) 2,666 (14 ) 40 Company contributions 2,139 1,615 22 27 Plan participants’ contributions 6 8 49 35 Plan settlements (474 ) (4 ) (10 ) (9 ) Foreign exchange gain (loss) (50 ) 72 — — Benefits paid (2,527 ) (1,960 ) (105 ) (95 ) Fair value of plan assets at end of year $ 19,321 $ 21,002 $ 300 $ 358 Retirement Plan Assumptions The tables below outline the actuarial assumptions of our domestic and foreign Pension Benefits and PRB plans. Pension Benefits Weighted-Average Net Periodic Benefit Cost Assumptions 2018 2017 2016 Discount rate 3.68 % 4.31 % 4.45 % Expected long-term rate of return on plan assets 7.38 % 7.39 % 7.91 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% Average 4.43 % 4.43 % 4.42 % PRB Weighted-Average Net Periodic Benefit Cost Assumptions 2018 2017 2016 Discount rate 3.72 % 4.28 % 4.42 % Expected long-term rate of return on plan assets 6.25 % 6.25 % 6.99 % 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. Pension Benefits PRB Weighted-Average Year-End Benefit Obligation Assumptions 2018 2017 2018 2017 Discount rate 4.28 % 3.68 % 4.31 % 3.72 % 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. Our long-term return on plan assets (ROA) and discount rate assumptions are the key variables in determining the net periodic benefit cost and the pension benefit obligation of our pension plans under U.S. GAAP. Our long-term ROA assumption only impacts the retirement benefits non-service expense. The discount rate assumption impacts the service cost component of FAS expense and retirement benefits non-service expense, while also impacting the pension benefit obligation. The discount rate represents the interest rate that should be used to determine the present value of future cash flows currently expected to be required to settle our pension and PRB obligations. The discount rate assumption is determined by using a theoretical bond portfolio model consisting of bonds rated AA or better by Moody’s Investors Service for which the timing and amount of cash flows approximate the estimated benefit payments for each of our pension plans. The weighted-average year-end benefit obligation discount rate for our domestic Pension Benefits plans was 4.33% and 3.72% at December 31, 2018 and December 31, 2017 , 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. 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 excess returns, also known as alpha, for active management. We then annually consider whether it is appropriate to change our long-term ROA assumption by reviewing the existing assumption against a statistically determined reasonable range of outcomes. 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. Actuarial Standard of Practice No. 27, Selection of Economic Assumptions for Measuring Pension Obligations (ASOP 27) requires the selection of a reasonable long-term ROA 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. We evaluate our long-term ROA assumption against a reasonable range of possible outcomes which we define as between the 35th to 65th percentile likelihood of achieving a long-term return over future years. We believe that validating our ROA assumption within this reasonable range 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 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 2018 , 2017 and 2016 is shown below. Percentile 2018 2017 2016 35 th 5.49 % 5.82 % 6.09 % 65 th 7.57 % 7.96 % 8.16 % 2016 ROA Assumption—The long-term domestic ROA of 8.0% fell between the 60th and 65th percentiles of the applicable reasonable range for 2016. The 50th percentile of this reasonable range was 7.12% . 2017 ROA Assumption—At year end 2016, we determined that the 8.0% long-term ROA assumption no longer fell within the range of reasonable outcomes, driven primarily by the current outlook on economic assumptions used to develop the reasonable range. As a result, we employed the building block approach described above to develop our 2017 long-term ROA assumption. The building block approach resulted in a long-term ROA assumption of 7.5% for 2017. To validate this assumption, we compared the result against the reasonable range of outcomes and confirmed that the 7.5% fell between the 55th and 60th percentile of the reasonable range for 2017 with the 50th percentile at 6.89% . Based upon our application of the building block approach and our review of the resulting assumption against the 35th to 65th percentile reasonable range and an analysis of our historical results, we established a 2017 long-term ROA domestic assumption of 7.5% for purposes of determining the net periodic benefit cost for 2017 and determined that the assumption is reasonable and consistent with the provisions of ASOP 27. 2018 ROA Assumption—The long-term domestic ROA of 7.5% fell between the 60th and 65th percentiles of the applicable reasonable range for 2018. The 50th percentile of this reasonable range was 6.74% . Our domestic pension plans’ actual rates of return were approximately (4)% , 15% and 6% for 2018 , 2017 and 2016 , respectively. The difference between the actual rate of return and our long-term ROA assumption is included in deferred gains and losses. The long-term ROA assumptions for our 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 (PBO) or the calculated “market-related value” of assets. We do not use a “corridor” approach in the calculation of FAS pension 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 $4 million increase or decrease. Plan Assets Substantially all our domestic Pension Benefits Plan (Plan) assets, which consist of investments in cash and cash equivalents, U.S. and international equities, real assets, private equity funds, private real estate funds, fixed income and other investments such as absolute return funds, 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 and liability 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, 2018 were as follows: Asset Category Global equity (combined U.S. and international equity) 30%-60% U.S. equities 20%-35% International equities 10%-25% Fixed income 20%-45% Cash and cash equivalents 0%-10% Private equity and private real estate funds 10%-20% Real assets 0%-4% Other (including absolute return funds) 5%-15% 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. The investment fiduciary may seek authorization from the Investment Committee to change the investing allocation ranges with a focus on managing the Plan in a prudent manner. 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, fees and a review of investment managers’ policies and processes. Investment performance is monitored frequently against appropriate benchmarks and within a compliance framework with the assistance of third-party performance measurement and evaluation tools, analytics and metrics. Consistent with managing the Plan in a prudent manner, 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 strategies with the intent to build a diversified portfolio. Plan assets can be invested in funds that track an index and are designed to achieve broad market diversification. The Plan had $2.5 billion invested in such funds across eight indices as of December 31, 2018 . Excluding funds that track an index, no individual investment strategy represented more than 5% of the Plan as of December 31, 2018 . 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 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 market participants. Investments in 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, 2018 and December 31, 2017 were as follows: December 31, 2018 (in millions) Total Level 1 Level 2 Level 3 Not subject to leveling (8) U.S. equities (1) $ 4,701 $ 2,189 $ — $ — $ 2,512 International equities (1) 3,141 2,522 4 — 615 Real assets (2) 53 — — — 53 Fixed income U.S. government and agency securities 1,923 1,727 196 — — Corporate debt securities/instruments (3) 2,907 329 2,088 — 490 Core fixed income (4) — — — — — Global multi-sector fixed income (5) 400 400 — — — Securitized and structured credit (6) 534 — — — 534 Cash and cash equivalents (7) 486 39 — — 447 Absolute return funds 1,432 — — — 1,432 Private equity funds 1,419 — — — 1,419 Private real estate funds 1,264 — — — 1,264 Insurance contracts 31 — — 31 — Total investments 18,291 7,206 2,288 31 8,766 Net receivables and payables 197 — — — 197 Total assets $ 18,488 $ 7,206 $ 2,288 $ 31 $ 8,963 December 31, 2017 (in millions) Total Level 1 Level 2 Level 3 Not subject to leveling (8) U.S. equities (1) $ 5,217 $ 2,631 $ — $ — $ 2,586 International equities (1) 3,784 2,613 1 — 1,170 Real assets (2) 100 79 — — 21 Fixed income U.S. government and agency securities 1,919 1,814 105 — — Corporate debt securities/instruments (3) 2,850 278 2,097 — 475 Core fixed income (4) 102 102 — — — Global multi-sector fixed income (5) 472 472 — — — Securitized and structured credit (6) 571 — — — 571 Cash and cash equivalents (7) 655 42 1 — 612 Absolute return funds 1,680 — — — 1,680 Private equity funds 1,416 — — — 1,416 Private real estate funds 1,203 — — — 1,203 Insurance contracts 30 — — 30 — Total investments 19,999 8,031 2,204 30 9,734 Net receivables and payables 76 — — — 76 Total assets $ 20,075 $ 8,031 $ 2,204 $ 30 $ 9,810 (1) U.S. and International equities primarily include investments across the spectrum of large, medium and small market capitalization stocks. (2) Real assets primarily include investments in physical and permanent assets, including infrastructure. (3) Corporate debt securities/instruments primarily include investments in investment grade and non-investment grade fixed income securities. (4) Core fixed income primarily includes investments in intermediate-term, high quality domestic securities issued by various governmental or private sector entities. (5) Global multi-sector fixed income primarily includes investments that invest globally among several sectors including governments, investment grade corporate bonds, high yield corporate bonds and emerging market securities. (6) Securitized and structured credit primarily includes investments 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. (7) Cash and cash equivalents are investments in highly liquid money market funds and bank sponsored collective 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. (8) 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 or adjusting market exposure in a non-speculative manner. The fair market value of the Plan’s derivatives through direct or separate account investments was approximately $6 million and $3 million as of December 31, 2018 and December 31, 2017 , 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 in accordance with specific jurisdictional requirements. Investments in the non-U.S. Pension Benefits plans consist primarily of fixed income and equities and had a fair market value of $833 million and $927 million at December 31, 2018 and December 31, 2017 , respectively. 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 $300 million and $358 million as of December 31, 2018 and December 31, 2017 , respectively. These assets included $141 million and $165 million at December 31, 2018 and December 31, 2017 , respectively, which 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). There were no Level 3 investments in the VEBA trusts at December 31, 2018 or December 31, 2017 . The table below details assets by category for our VEBA trusts. These assets consisted primarily of publicly-traded equity securities and publicly-traded fixed income securities. % of Plan Assets at Dec 31: Asset category 2018 2017 Fixed income securities 42 % 44 % U.S. equities 36 % 40 % International equities 10 % 10 % Cash and cash equivalents 12 % 6 % Total 100 % 100 %

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for federal and foreign income taxes consisted of the following: (In millions) 2018 2017 2016 Current income tax expense (benefit) Federal $ 245 $ 822 $ 713 Foreign 43 40 38 State — — (3 ) Deferred income tax expense (benefit) Federal (42 ) 235 118 Foreign 15 18 6 State 3 (1 ) 1 Total $ 264 $ 1,114 $ 873 The expense for income taxes differed from the U.S. statutory rate due to the following: 2018 2017 2016 Statutory tax rate 21.0 % 35.0 % 35.0 % Foreign derived intangible income (FDII) (4.2 ) — — Research and development tax credit (R&D tax credit) (2.4 ) (1.5 ) (1.3 ) Equity compensation (1.0 ) (1.2 ) (1.6 ) Foreign income tax rate differential 1.3 0.2 — Prior year true-up (1.1 ) 0.1 — Tax benefit related to discretionary pension contributions (3.0 ) — — R&D tax credit claims related to the 2014-2017 tax years (2.1 ) — — Irish restructuring (2.0 ) — — Change in valuation allowance 2.0 — — Domestic manufacturing deduction benefit — (2.5 ) (2.7 ) Remeasurement of deferred taxes — 3.2 — One-time transition tax on previously undistributed foreign earnings — 2.3 — TRS SAS tax-free gain — — (1.8 ) Other items, net (0.1 ) 0.2 0.7 Effective tax rate 8.4 % 35.8 % 28.3 % In 2017, the Tax Cuts and Jobs Act of 2017 (2017 Act) was enacted, which reduced the U.S. corporate tax rate to 21% effective in 2018. See below for a detailed discussion of the 2017 Act. In the fourth quarter of 2018, Forcepoint completed an Irish restructuring transaction resulting in a deferred tax asset of approximately $63 million . We have evaluated both the positive and negative evidence to support our ability to realize the deferred tax asset associated with the restructuring. We believe it is more likely than not that the benefit from this restructuring transaction will not be realized. Accordingly, we have provided a valuation allowance of $63 million on the deferred tax asset related to this transaction. In the third quarter of 2018, the Company recognized a net tax benefit of $110 million related to the completion of the 2017 tax return and additional amended research and development tax credit (R&D tax credit) claims related to the 2014-2016 tax years. Also in the third quarter of 2018, we made a discretionary contribution to our pension plans of $1.25 billion . In the second quarter of 2018, we determined we would make this contribution and as a result recorded a net tax benefit of $95 million in the second quarter of 2018. This was primarily due to the remeasurement of the related deferred tax asset balance at the 2017 tax rate of 35% versus the 2018 tax rate of 21% since the discretionary contribution was deductible on our 2017 tax return. In 2016, the Company recorded a tax benefit of approximately $55 million as a result of the tax-free gain from the sale of our equity method investment in TRS SAS as discussed in “Note 4: Thales-Raytheon Systems Co. Ltd. (TRS) Joint Venture.” We are subject to income taxes in the U.S. and numerous foreign jurisdictions. In August 2018, we received a full acceptance letter from the IRS that finalized their review of the 2016 tax year with no proposed changes. With the exception of one matter related to the 2015 tax year, all IRS examinations related to originally filed returns are closed through the 2016 tax year. In December 2017, we received the IRS Revenue Agent’s Report for the 2015 tax year which proposed approximately $41 million in adjustments related to the Forcepoint transaction and a U.K. share redemption transaction. We disagree and have protested the proposed adjustments with the IRS Appeals division. In the second quarter of 2018, the IRS agreed to withdraw the issue involving the U.K. share redemption transaction, which reduced the proposed adjustment to $32 million . Except for the issue appealed for the 2015 tax year, we have no proposed adjustments for any tax year prior to 2018. No amount related to the remaining proposed IRS adjustment is reflected in unrecognized tax benefits as of December 31, 2018. The amended tax returns for tax years 2014-2016 which reflect refund claims related to the increased R&D tax credits will be subject to audit. The schedule for that audit has yet to be proposed by the IRS. We are also under audit by multiple state and foreign tax authorities. (In millions) 2018 2017 2016 Domestic income from continuing operations before taxes $ 2,937 $ 3,027 $ 2,964 Foreign income from continuing operations before taxes 210 86 121 The Company will generally be free of additional U.S. federal tax consequences due to a dividends received deduction implemented as part of the move to a territorial tax system on distributed foreign subsidiary earnings. No provision has been made for deferred taxes related to any remaining historical outside basis differences in our non-U.S. subsidiaries. Determination of the amount of unrecognized deferred tax liability on outside basis differences is not practicable because these differences primarily relate to non-earnings and profits (E&P) book tax differences, such as acquisition accounting, and could be recognized upon a sale or other transactions of a subsidiary. The Company continues to assert indefinite reinvestment on these outside basis differences generated on or before December 31, 2017. We made (received) the following net tax payments (refunds) during the years ended December 31: (In millions) 2018 2017 2016 Federal $ (69 ) $ 765 $ 710 Foreign 63 77 47 State 23 36 22 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 as 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 our unrecognized tax benefits, exclusive of interest, was $92 million and $9 million at December 31, 2018 and December 31, 2017 , respectively, the majority of which would affect our earnings if recognized. We accrue interest and penalties related to unrecognized tax benefits in tax expense. Interest and penalties recognized during 2018 , 2017 and 2016 and accrued as of December 31, 2018 and December 31, 2017 were immaterial. A rollforward of our unrecognized tax benefits was as follows: (In millions) 2018 2017 2016 Unrecognized tax benefits, beginning of year $ 9 $ 7 $ 7 Additions based on current year tax positions 20 1 2 Additions based on prior year tax positions 68 4 1 Reductions based on prior year tax positions (5 ) (1 ) (3 ) Settlements based on prior year tax positions — (2 ) — Unrecognized tax benefits, end of year $ 92 $ 9 $ 7 With the exception of Forcepoint, we generally defer our state income tax expense 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 prepaid expenses and other current assets until allocated to our contracts, which generally occurs upon payment or when otherwise agreed as allocable with the U.S. government. Current state income tax expense allocated to our contracts was $18 million , $32 million and $26 million in 2018 , 2017 and 2016 , 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) 2018 2017 Noncurrent deferred tax assets (liabilities) Accrued employee compensation and benefits $ 209 $ 202 Other accrued expenses and reserves 77 86 Contract balances and inventories (494 ) (537 ) Pension benefits 1,306 1,505 Other retiree benefits 67 67 Net operating loss and tax credit carryforwards 83 99 Depreciation and amortization (827 ) (858 ) Partnership outside basis difference (29 ) (36 ) Other 21 21 Valuation allowance (84 ) (17 ) Deferred income taxes—noncurrent $ 329 $ 532 As of December 31, 2018 , we had U.S. federal and state net operating loss (NOL) carryforwards related to Forcepoint of $110 million and $292 million , respectively, which expire at various dates through 2037. We believe it is more likely than not that the deferred tax asset will be realized to the extent of existing deferred tax liabilities. We also had foreign NOL carryforwards of $95 million as of December 31, 2018 , with the majority generated in the U.K. where NOLs may be carried forward indefinitely. We believe that we will have sufficient taxable income to realize these deferred tax assets. The Tax Cuts and Jobs Act On December 22, 2017, the President signed the Tax Cuts and Jobs Act of 2017 (2017 Act) which enacted a wide range of changes to the U.S. corporate income tax system. The 2017 Act reduced the U.S. corporate statutory federal tax rate to 21% effective in 2018, eliminated the domestic manufacturing deduction benefit and introduced other tax base broadening measures, changed rules for expensing and capitalizing business expenditures, established a territorial tax system for foreign earnings as well as a minimum tax on certain foreign earnings, provided for a one-time transition tax on previously undistributed foreign earnings, and introduced new rules for the treatment of certain foreign income, including foreign derived intangible income (FDII). Also on December 22, 2017, the Securities and Exchange Commission (SEC) issued Staff Accounting Bulletin No. 118 (SAB 118), which provided companies with additional guidance on how to account for the 2017 Act in their financial statements, allowing companies to use a measurement period. As of December 31, 2017, we made a reasonable estimate of the effects on our existing deferred tax balances and the one-time transition tax on previously undistributed foreign earnings and recognized provisional amounts totaling $171 million in accordance with SAB 118, which was included as a component of income tax expense from continuing operations. As of December 31, 2018, we had finalized our provisional estimates for the remeasurement of our existing U.S. deferred tax balances and the one-time transition tax for which we recorded a $1 million tax benefit in 2018. Deferred tax assets and liabilities—At the date of enactment, the Company had a net deferred tax asset for the difference between the tax basis and the book basis of the U.S. assets and liabilities. Due to the 2017 Act, the future impact associated with the reversal of the net deferred tax asset will be subject to tax at a lower corporate tax rate. Consequently in 2017, we recorded a tax expense of $100 million to reduce the Company’s deferred tax asset due to the remeasurement of the U.S. deferred tax assets and liabilities for the reduction in the corporate tax rate from 35% to 21%. At December 31, 2018, we have finalized our provisional estimate for the remeasurement of our existing deferred tax balances with no additional adjustment. Transition tax—The one-time transition tax is based on our total post-1986 E&P for which we have previously deferred U.S. income taxes. In 2017, we recorded a provisional amount for our one-time transition tax liability, using an applicable tax rate of 15.5% , resulting in an increase in income tax expense of $71 million after accounting for foreign tax credits. In 2018, we recorded a $1 million tax benefit to finalize our provisional calculation for the one-time transition tax for foreign E&P. This refinement was a result of completing the data gathering and analysis based on the 2017 Act and guidance issued to date in 2018, including IRS Notices 2018-07, 2018-13 and 2018-26. No provision has been made for deferred taxes related to any remaining historical outside basis differences in our non-U.S. subsidiaries as we continue to assert indefinite reinvestment on outside basis differences not related to amounts that have been previously taxed in the U.S. or undistributed earnings generated after December 31, 2017.

Business Segment Reporting

Business Segment Reporting	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
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 solutions; naval combat and ship electronic and sensing systems; and undersea sensing and effects solutions. 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; DoD space and weather solutions; cybersecurity; analytics; training; logistics; mission support; advanced software-based complex systems; automation and sustainment solutions; and international and domestic Air Traffic Management (ATM) systems. MS designs, develops, integrates and produces missile and combat systems for the armed forces of the U.S. and allied nations. Leveraging its capabilities in advanced airframes, guidance and navigation systems, high-resolution sensors, surveillance, hypersonic systems, targeting and netted systems, MS provides 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, development and manufacture of integrated sensor and communication systems for advanced missions. These missions include intelligence, surveillance and reconnaissance; precision engagement; manned and unmanned aerial operations; and space. Leveraging state-of-the-art technologies, mission systems and domain knowledge, SAS designs, manufactures, supports and sustains civil and military 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; tactical and strategic communications; and space-qualified systems. Forcepoint develops cybersecurity products serving commercial and government organizations worldwide. Forcepoint is a joint venture of Raytheon and Vista Equity Partners created in May 2015 that brought together the capabilities of the legacy Raytheon Cyber Products (RCP) and Websense, Inc. (Websense) businesses. Forcepoint delivers a portfolio of human-centric cybersecurity capabilities that incorporate behavior based insights, including risk adaptive data loss prevention; user and entity behavior analytics (UEBA) and cloud access security broker (CASB) capabilities; insider threat solutions; next-generation firewall (NGFW) technology; cloud and on premise web and email security; and cross domain transfer products. As previously announced, effective January 1, 2018, we adopted the requirements of ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost on a retrospective basis as discussed in “Note 1: Summary of Significant Accounting Policies.” All amounts and disclosures set forth in this Form 10-K reflect these changes. Segment total net sales and operating income include intersegment sales and profit generally 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 include 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. Acquisition Accounting Adjustments include the adjustments to record acquired deferred revenue at fair value as part of our purchase price allocation process and the amortization of acquired intangible assets related to historical acquisitions. Segment financial results were as follows: Total Net Sales (in millions) 2018 2017 2016 Integrated Defense Systems $ 6,180 $ 5,804 $ 5,529 Intelligence, Information and Services 6,722 6,177 6,169 Missile Systems 8,298 7,787 7,096 Space and Airborne Systems 6,748 6,430 6,182 Forcepoint 634 608 586 Eliminations (1,514 ) (1,423 ) (1,361 ) Total business segment sales 27,068 25,383 24,201 Acquisition Accounting Adjustments (10 ) (35 ) (77 ) Total $ 27,058 $ 25,348 $ 24,124 Intersegment Sales (in millions) 2018 2017 2016 Integrated Defense Systems $ 65 $ 64 $ 69 Intelligence, Information and Services 666 666 657 Missile Systems 161 132 122 Space and Airborne Systems 596 540 493 Forcepoint 26 21 20 Total $ 1,514 $ 1,423 $ 1,361 Operating Income (in millions) 2018 2017 2016 Integrated Defense Systems $ 1,023 $ 935 $ 971 Intelligence, Information and Services 538 455 467 Missile Systems 973 1,010 921 Space and Airborne Systems 884 862 808 Forcepoint 5 33 90 Eliminations (170 ) (148 ) (142 ) Total business segment operating income 3,253 3,147 3,115 Acquisition Accounting Adjustments (126 ) (160 ) (198 ) FAS/CAS Operating Adjustment 1,428 1,303 1,036 Corporate (17 ) (59 ) (57 ) Total $ 4,538 $ 4,231 $ 3,896 Intersegment Operating Income (in millions) 2018 2017 2016 Integrated Defense Systems $ 6 $ 5 $ 4 Intelligence, Information and Services 68 64 65 Missile Systems 15 13 12 Space and Airborne Systems 60 51 46 Forcepoint 21 15 15 Total $ 170 $ 148 $ 142 We must calculate our pension and PRB costs under both FAS requirements under U.S. GAAP and CAS requirements. 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 costs. Our FAS expense is split between operating income and non-operating income where only the service cost component of FAS expense is included in operating income. The FAS/CAS Operating Adjustment, which is reported as a separate line in our segment results above, represents the difference between the service cost component of our pension and PRB expense or income under FAS in accordance with U.S. GAAP and our pension and PRB expense under CAS. The pension and PRB components of the FAS/CAS Operating Adjustment were as follows: (In millions) 2018 2017 2016 FAS/CAS Pension Operating Adjustment $ 1,415 $ 1,291 $ 1,026 FAS/CAS PRB Operating Adjustment 13 12 10 FAS/CAS Operating Adjustment $ 1,428 $ 1,303 $ 1,036 Capital Expenditures (in millions) 2018 2017 2016 Integrated Defense Systems $ 242 $ 200 $ 135 Intelligence, Information and Services 46 22 59 Missile Systems 337 221 135 Space and Airborne Systems 136 158 149 Forcepoint 13 14 19 Corporate 24 19 29 Total (1) $ 798 $ 634 $ 526 (1) Total capital expenditures may not agree to our consolidated statements of cash flows due to non-cash transactions. Depreciation and Amortization (in millions) 2018 2017 2016 Integrated Defense Systems $ 98 $ 98 $ 88 Intelligence, Information and Services 51 50 65 Missile Systems 98 84 69 Space and Airborne Systems 140 132 122 Forcepoint 17 17 15 Acquisition Accounting Adjustments 116 125 121 Corporate 48 44 35 Total $ 568 $ 550 $ 515 Total Assets (in millions) 2018 2017 Integrated Defense Systems (1) $ 4,829 $ 4,679 Intelligence, Information and Services (1) 4,242 4,230 Missile Systems (1) 8,229 7,338 Space and Airborne Systems (1) 6,750 6,696 Forcepoint (1) 2,531 2,543 Corporate 5,283 5,374 Total $ 31,864 $ 30,860 (1) Total assets includes intangible assets. Related amortization expense is included in Acquisition Accounting Adjustments. Property, Plant and Equipment, Net, by Geographic Area (in millions) 2018 2017 United States $ 2,751 $ 2,362 All other (principally Europe) 89 77 Total $ 2,840 $ 2,439 We disaggregate our revenue from contracts with customers by geographic location, customer-type and contract-type for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. See details in the tables below. 2018 Disaggregation of Total Net Sales (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Other Total United States Sales to the U.S. government (1) Fixed-price contracts $ 818 $ 1,008 $ 2,953 $ 2,480 $ 118 $ — $ 7,377 Cost-type contracts 1,706 4,110 2,675 2,565 14 — 11,070 Direct commercial sales and other U.S. sales Fixed-price contracts 5 118 41 111 209 — 484 Cost-type contracts 1 18 — 3 — — 22 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 189 243 450 152 — — 1,034 Cost-type contracts 79 45 61 22 — — 207 Direct commercial sales and other foreign sales (1) Fixed-price contracts 711 198 173 211 70 — 1,363 Cost-type contracts 117 — 1 1 — — 119 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 849 20 452 237 — — 1,558 Cost-type contracts 170 5 23 69 — — 267 Direct commercial sales and other foreign sales (1) Fixed-price contracts 1,137 15 785 95 33 — 2,065 Cost-type contracts — — 96 — — — 96 All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 151 2 124 56 — — 333 Cost-type contracts 27 — 70 6 — — 103 Direct commercial sales and other foreign sales (1) Fixed-price contracts 145 230 231 144 154 — 904 Cost-type contracts 10 44 2 — — — 56 Total net sales 6,115 6,056 8,137 6,152 598 — 27,058 Intersegment sales 65 666 161 596 26 (1,514 ) — Acquisition Accounting Adjustments — — — — 10 (10 ) — Reconciliation to business segment sales $ 6,180 $ 6,722 $ 8,298 $ 6,748 $ 634 $ (1,524 ) $ 27,058 (1) Excludes foreign military sales through the U.S. government. 2018 Total Net Sales by Geographic Area (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total United States $ 2,530 $ 5,254 $ 5,669 $ 5,159 $ 341 $ 18,953 Asia/Pacific 1,096 486 685 386 70 2,723 Middle East and North Africa 2,156 40 1,356 401 33 3,986 All other (principally Europe) 333 276 427 206 154 1,396 Total net sales $ 6,115 $ 6,056 $ 8,137 $ 6,152 $ 598 $ 27,058 2018 Total Net Sales by Major Customer (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Sales to the U.S. government (1) $ 2,524 $ 5,118 $ 5,628 $ 5,045 $ 132 $ 18,447 U.S. direct commercial sales and other U.S. sales 6 136 41 114 209 506 Foreign military sales through the U.S. government 1,465 315 1,180 542 — 3,502 Foreign direct commercial sales and other foreign sales (1) 2,120 487 1,288 451 257 4,603 Total net sales $ 6,115 $ 6,056 $ 8,137 $ 6,152 $ 598 $ 27,058 (1) Excludes foreign military sales through the U.S. government. 2018 Total Net Sales by Contract Type (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Fixed-price contracts $ 4,005 $ 1,834 $ 5,209 $ 3,486 $ 584 $ 15,118 Cost-type contracts 2,110 4,222 2,928 2,666 14 11,940 Total net sales $ 6,115 $ 6,056 $ 8,137 $ 6,152 $ 598 $ 27,058 2017 Disaggregation of Total Net Sales (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Other Total United States Sales to the U.S. government (1) Fixed-price contracts $ 812 $ 1,090 $ 2,914 $ 2,233 $ 111 $ — $ 7,160 Cost-type contracts 1,507 3,576 1,991 2,614 12 — 9,700 Direct commercial sales and other U.S. sales Fixed-price contracts 6 130 1 51 202 — 390 Cost-type contracts 1 9 — 2 1 — 13 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 167 181 410 113 — — 871 Cost-type contracts 138 51 64 9 — — 262 Direct commercial sales and other foreign sales (1) Fixed-price contracts 596 193 309 284 59 — 1,441 Cost-type contracts 145 — 1 1 — — 147 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 1,066 18 371 191 — — 1,646 Cost-type contracts 154 1 22 30 — — 207 Direct commercial sales and other foreign sales (1) Fixed-price contracts 979 18 1,013 175 25 — 2,210 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 7 3 157 51 — — 218 Cost-type contracts 22 2 78 5 — — 107 Direct commercial sales and other foreign sales (1) Fixed-price contracts 128 209 320 131 142 — 930 Cost-type contracts 12 30 4 — — — 46 Total net sales 5,740 5,511 7,655 5,890 552 — 25,348 Intersegment sales 64 666 132 540 21 (1,423 ) — Acquisition Accounting Adjustments — — — — 35 (35 ) — Reconciliation to business segment sales $ 5,804 $ 6,177 $ 7,787 $ 6,430 $ 608 $ (1,458 ) $ 25,348 (1) Excludes foreign military sales through the U.S. government. 2017 Total Net Sales by Geographic Area (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total United States $ 2,326 $ 4,805 $ 4,906 $ 4,900 $ 326 $ 17,263 Asia/Pacific 1,046 425 784 407 59 2,721 Middle East and North Africa 2,199 37 1,406 396 25 4,063 All other (principally Europe) 169 244 559 187 142 1,301 Total net sales $ 5,740 $ 5,511 $ 7,655 $ 5,890 $ 552 $ 25,348 2017 Total Net Sales by Major Customer (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Sales to the U.S. government (1) $ 2,319 $ 4,666 $ 4,905 $ 4,847 $ 123 $ 16,860 U.S. direct commercial sales and other U.S. sales 7 139 1 53 203 403 Foreign military sales through the U.S. government 1,554 256 1,102 399 — 3,311 Foreign direct commercial sales and other foreign sales (1) 1,860 450 1,647 591 226 4,774 Total net sales $ 5,740 $ 5,511 $ 7,655 $ 5,890 $ 552 $ 25,348 (1) Excludes foreign military sales through the U.S. government. 2017 Total Net Sales by Contract Type (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Fixed-price contracts $ 3,761 $ 1,842 $ 5,495 $ 3,229 $ 539 $ 14,866 Cost-type contracts 1,979 3,669 2,160 2,661 13 10,482 Total net sales $ 5,740 $ 5,511 $ 7,655 $ 5,890 $ 552 $ 25,348 2016 Disaggregation of Total Net Sales (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Other Total United States Sales to the U.S. government (1) Fixed-price contracts $ 766 $ 1,170 $ 2,647 $ 2,321 $ 86 $ — $ 6,990 Cost-type contracts 1,473 3,357 1,902 2,345 16 — 9,093 Direct commercial sales and other U.S. sales Fixed-price contracts 13 167 2 20 193 — 395 Cost-type contracts 5 22 — 3 — — 30 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 136 180 328 107 — — 751 Cost-type contracts 119 77 70 6 — — 272 Direct commercial sales and other foreign sales (1) Fixed-price contracts 502 166 249 288 49 — 1,254 Cost-type contracts 175 — 1 — — — 176 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 816 60 387 148 — — 1,411 Cost-type contracts 153 3 25 1 — — 182 Direct commercial sales and other foreign sales (1) Fixed-price contracts 1,086 72 829 272 18 — 2,277 Cost-type contracts 1 — — — — — 1 All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 18 2 108 34 — — 162 Cost-type contracts 23 — 90 8 — — 121 Direct commercial sales and other foreign sales (1) Fixed-price contracts 162 206 333 136 127 — 964 Cost-type contracts 12 30 3 — — — 45 Total net sales 5,460 5,512 6,974 5,689 489 — 24,124 Intersegment sales 69 657 122 493 20 (1,361 ) — Acquisition Accounting Adjustments — — — — 77 (77 ) — Reconciliation to business segment sales $ 5,529 $ 6,169 $ 7,096 $ 6,182 $ 586 $ (1,438 ) $ 24,124 (1) Excludes foreign military sales through the U.S. government. 2016 Total Net Sales by Geographic Area (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total United States $ 2,257 $ 4,716 $ 4,551 $ 4,689 $ 295 $ 16,508 Asia/Pacific 932 423 648 401 49 2,453 Middle East and North Africa 2,056 135 1,241 421 18 3,871 All other (principally Europe) 215 238 534 178 127 1,292 Total net sales $ 5,460 $ 5,512 $ 6,974 $ 5,689 $ 489 $ 24,124 2016 Total Net Sales by Major Customer (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Sales to the U.S. government (1) $ 2,239 $ 4,527 $ 4,549 $ 4,666 $ 102 $ 16,083 U.S. direct commercial sales and other U.S. sales 18 189 2 23 193 425 Foreign military sales through the U.S. government 1,265 322 1,008 304 — 2,899 Foreign direct commercial sales and other foreign sales (1) 1,938 474 1,415 696 194 4,717 Total net sales $ 5,460 $ 5,512 $ 6,974 $ 5,689 $ 489 $ 24,124 (1) Excludes foreign military sales through the U.S. government. 2016 Total Net Sales by Contract Type (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Fixed-price contracts $ 3,499 $ 2,023 $ 4,883 $ 3,326 $ 473 $ 14,204 Cost-type contracts 1,961 3,489 2,091 2,363 16 9,920 Total net sales $ 5,460 $ 5,512 $ 6,974 $ 5,689 $ 489 $ 24,124

Quarterly Operating Results (Un

Quarterly Operating Results (Unaudited)	12 Months Ended
	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Quarterly Operating Results (Unaudited)	Quarterly Operating Results (Unaudited) 2018 (in millions, except per share amounts and workdays) First Second Third (3) Fourth Total net sales $ 6,267 $ 6,625 $ 6,806 $ 7,360 Gross margin 1,735 1,848 1,935 1,967 Income from continuing operations 624 790 641 828 Net income attributable to Raytheon Company 633 800 644 832 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 2.20 $ 2.78 $ 2.25 $ 2.93 Diluted 2.20 2.78 2.25 2.93 EPS attributable to Raytheon Company common stockholders (1) Basic 2.20 2.78 2.25 2.93 Diluted 2.19 2.78 2.25 2.93 Workdays (2) 64 64 63 58 2017 (in millions, except per share amounts and workdays) First Second Third Fourth (4) Total net sales $ 6,000 $ 6,281 $ 6,284 $ 6,783 Gross margin 1,634 1,760 1,816 1,798 Income from continuing operations 497 547 568 387 Net income attributable to Raytheon Company 506 553 572 393 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 1.73 $ 1.90 $ 1.97 $ 1.35 Diluted 1.73 1.89 1.97 1.35 EPS attributable to Raytheon Company common stockholders (1) Basic 1.74 1.90 1.97 1.35 Diluted 1.74 1.89 1.97 1.35 Workdays (2) 64 64 62 58 (1) EPS is computed independently for each of the quarters presented; therefore, the sum of the quarterly EPS may not equal the total computed for each year. (2) Number of workdays per our fiscal calendar, which excludes holidays and weekends. (3) In the third quarter of 2018, we recognized a non-cash pension settlement charge of $288 million for certain Raytheon-sponsored pension plans that purchased a group annuity contract from an insurance company to transfer some of our outstanding pension benefit obligations. (4) In the fourth quarter of 2017, we recorded a provisional tax-related expense of $171 million

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
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, we reclassified certain amounts to conform to our current period presentation. See Accounting Standards, below, for additional information on reclassifications.
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 — The vast majority of our revenues are from long-term contracts associated with the design, development, manufacture or modification of complex aerospace or defense equipment or related services. These contracts primarily are with the U.S. government (including foreign military sales contracted through the U.S. government). Our contracts with the U.S. government typically are subject to the Federal Acquisition Regulation (FAR) and are priced based on estimated or actual costs of producing goods or providing services. The FAR provides guidance on the types of costs that are allowable in establishing prices for goods and services provided under U.S. government contracts. The pricing for non-U.S. government contracts is based on the specific negotiations with each customer. Under the typical payment terms of our U.S. government fixed-price contracts, the customer pays us either performance-based payments (PBPs) or progress payments. PBPs are interim payments up to 90% of the contract price based on quantifiable measures of performance or on the achievement of specified events or milestones. Progress payments are interim payments up to 80% of costs incurred as the work progresses. Because the customer retains a portion of the contract price until completion of the contract, our U.S. government fixed-price contracts generally result in revenue recognized in excess of billings which we present as contract assets on the balance sheet. Amounts billed and due from our customers are classified as receivables on the balance sheet. The portion of the payments retained by the customer until final contract settlement is not considered a significant financing component because the intent is to protect the customer. For our U.S. government cost-type contracts, the customer generally pays us for our actual costs incurred within a short period of time. For non-U.S. government contracts, we typically receive interim payments as work progresses, although for some contracts, we may be entitled to receive an advance payment. We recognize a liability for these advance payments in excess of revenue recognized and present it as contract liabilities on the balance sheet. The advance payment typically is not considered a significant financing component because it is used to meet working capital demands that can be higher in the early stages of a contract and to protect us from the other party failing to adequately complete some or all of its obligations under the contract. To determine the proper revenue recognition method for contracts for complex aerospace or defense equipment or related services, we evaluate whether two or more contracts should be combined and accounted for as one single contract and whether the combined or single contract should be accounted for as more than one performance obligation. This evaluation requires significant judgment and the decision to combine a group of contracts or separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. For most of our contracts, the customer contracts with us to provide a significant service of integrating a complex set of tasks and components into a single project or capability (even if that single project results in the delivery of multiple units). Hence, the entire contract is accounted for as one performance obligation. Less commonly, however, we may promise to provide distinct goods or services within a contract, for example when a contract covers multiple phases of the product lifecycle (e.g., development, production, maintenance and support), in which case we separate the contract into more than one performance obligation. If a contract is separated into more than one performance obligation, we allocate the total transaction price to each performance obligation in an amount based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. We infrequently sell standard products with observable standalone sales. In cases where we do, the observable standalone sales are used to determine the standalone selling price. More frequently, we sell a customized customer specific solution, and in these cases we typically use the expected cost plus a margin approach to estimate the standalone selling price of each performance obligation. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. For certain contracts that meet the foregoing requirements, primarily international direct commercial sale contracts, we are required to obtain certain regulatory approvals. In these cases, we recognize revenue based on the likelihood of obtaining regulatory approvals based upon all known facts and circumstances. We generally recognize revenue over time as we perform on our performance obligations because of continuous transfer of control to the customer. For U.S. government contracts, this continuous transfer of control to the customer is supported by clauses in the contract that allow the customer to unilaterally terminate the contract for convenience, pay us for costs incurred plus a reasonable profit and take control of any work in process. Similarly, for non-U.S. government contracts, the customer typically controls the work in process as evidenced either by contractual termination clauses or by our rights to payment for work performed to date plus a reasonable profit to deliver products or services that do not have an alternative use to the Company. Because of control transferring over time, revenue is recognized based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion 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 contracts because it best depicts the transfer of control to the customer which occurs as we incur costs on our contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenues, including estimated fees or profits, are recorded proportionally as costs are incurred. Costs to fulfill include labor, materials and subcontractors’ costs, other direct costs and an allocation of indirect costs including pension and any other postretirement benefit (PRB) expense under U.S. government Cost Accounting Standards (CAS). Due to the nature of the work required to be performed on many of our performance obligations, the estimation of total revenue and cost at completion (the process described below in more detail) is complex, subject to many variables and requires significant judgment. It is common for our long-term contracts to contain award fees, incentive fees, or other provisions that can either increase or decrease the transaction price. These variable amounts generally are awarded upon achievement of certain performance metrics, program milestones or cost targets and can be based upon customer discretion. We estimate variable consideration at the most likely amount to which we expect to be entitled. We include estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. Contracts are often modified to account for changes in contract specifications and requirements. We consider contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of our contract modifications are for goods or services that are not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a contract modification on the transaction price and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. We have a companywide standard and disciplined quarterly Estimate at Completion (EAC) process in which management reviews the progress and execution of our performance obligations. As part of this process, management reviews information including, but not limited to, any outstanding key contract matters, progress towards completion and the related program schedule, identified risks and opportunities and the related changes in estimates of revenues and costs. The risks and opportunities include management’s judgment about the ability and cost to achieve the schedule (e.g., the number and type of milestone events), technical requirements (e.g., a newly-developed product versus a mature product) and other contract requirements. Management must make assumptions and estimates regarding labor productivity and availability, the complexity of the work to be performed, the availability of materials, the length of time to complete the performance obligation (e.g., to estimate increases in wages and prices for materials and related support cost allocations), execution 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 in the form of either offset obligations or in-country industrial participation (ICIP) agreements, required under certain contracts. These obligations may or may not be distinct depending on their nature. 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 performance obligations, if we determine we will be successful in mitigating risks surrounding the technical, schedule and cost aspects of those performance obligations or realizing related opportunities. Likewise, these adjustments may result in a decrease in operating income if we determine we will not be successful in mitigating these risks or realizing related opportunities. Changes in estimates of net sales, cost of sales and the related impact to operating income are recognized quarterly on a cumulative catch-up basis, which recognizes in the current period the cumulative effect of the changes on current and prior periods based on a performance obligation’s percentage of completion. A significant change in one or more of these estimates could affect the profitability of one or more of our performance obligations. When estimates of total costs to be incurred exceed total estimates of revenue to be earned on a performance obligation related to complex aerospace or defense equipment or related services, or product maintenance or separately priced extended warranty, a provision for the entire loss on the performance obligation is recognized in the period the loss is identified. Net EAC adjustments had the following impact on our operating results: (In millions, except per share amounts) 2018 (1) 2017 2016 Operating income $ 492 $ 442 $ 418 Income from continuing operations attributable to Raytheon Company 389 287 283 Diluted EPS from continuing operations attributable to Raytheon Company $ 1.36 $ 0.98 $ 0.95 (1) 2018 amounts reflect a U.S. statutory tax rate of 21%, which became effective in 2018 with the adoption of the Tax Cuts and Jobs Act of 2017 (2017 Act). In addition, net revenue recognized from our performance obligations satisfied in previous periods was $636 million , $520 million and $509 million in 2018 , 2017 and 2016 , respectively. This primarily relates to EAC adjustments that impacted revenue. We also sell security software through our Forcepoint segment. For the majority of these arrangements, we recognize revenue over the term of the agreement because the software requires continuous updates to provide the intended security functionality. To a lesser extent in all of our business segments, we enter into other types of contracts including service arrangements and non-subscription software and licensing agreements. We recognize revenue for these arrangements over time or at a point in time depending on our evaluation of when the customer obtains control of the promised goods or services. For software arrangements that include multiple performance obligations, including hardware, perpetual software licenses, subscriptions, term licenses and maintenance and/or services, we allocate revenue to each performance obligation based on estimates of the price that we would charge the customer for each promised product or service if it were sold on a standalone basis. Recent events have caused increased attention on U.S. defense sales to the Kingdom of Saudi Arabia (KSA). KSA represents nearly 5% of our sales and $2.2 billion of our remaining performance obligations at December 31, 2018 . Although we currently do not expect to be prevented from doing business in KSA, if government action impairs our ability to fulfill our contractual obligations or otherwise to continue to do business in KSA, it would have a material adverse effect on our financial results.
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 and have primarily been for product development for the U.S. government. Expenditures for Company-sponsored research and development projects are expensed as incurred, and were $841 million , $700 million and $725 million in 2018 , 2017 and 2016
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 provides for a U.S. tax liability on outside basis differences in our foreign subsidiaries related to amounts which have been previously taxed in the U.S. and undistributed earnings generated after December 31, 2017. This deferred tax liability generally relates to foreign currency movement and foreign withholding taxes. The Company continues to assert indefinite reinvestment on outside basis differences related to all other items, such as acquisition accounting adjustments. 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 when it is paid (recovered) or otherwise agreed as allocable with the U.S. government. Payments made for state income taxes related to Forcepoint are included in federal and foreign income tax expense.
Other (Income) Expense, Net [Policy Text Block]	Other (Income) Expense, Net—Other (income) expense, net, consists primarily of gains and losses from our investments held in trusts used to fund certain of our non-qualified deferred compensation and employee benefit plans, gains and losses on the early repurchase of long-term debt and certain financing fees. Periodically we enter into equity method or other investments that are not related to our core operations, including investments in early stage technology companies. 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.
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. Cash and cash equivalents excludes $16 million and $12 million of restricted cash at December 31, 2018 and December 31, 2017
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 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, 2018 , we had no short-term investments as all short-term investments outstanding at December 31, 2017 matured in the first quarter of 2018. At December 31, 2017 , we had short-term investments of $297 million consisting of highly rated bank certificates of deposit with a minimum long-term debt rating of A or A2 and a minimum short-term debt rating of A-1 or P-1 . The amortized cost of these securities closely approximated their fair value. In 2017 , we recorded unrealized losses on short-term investments of less than $1 million , net of tax, in accumulated other comprehensive loss (AOCL). We did no t have any sales of short-term investments in 2018 or 2017
Receivables, Net [Policy Text Block]	Receivables, Net —Receivables, net, include amounts billed and currently due from customers. The amounts due are stated at their net estimated realizable value. We maintain an allowance for doubtful accounts to provide for the estimated amount of receivables 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.
Contract Assets [Policy Text Block]	Contract Assets —Contract assets include unbilled amounts typically resulting from sales under long-term contracts when the cost-to-cost method of revenue recognition is utilized and revenue recognized exceeds the amount billed to the customer, and right to payment is not just subject to the passage of time. Amounts may not exceed their net realizable value. Contract assets are generally classified as current.
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) 2018 2017 Materials and purchased parts $ 75 $ 69 Work in process 662 504 Finished goods 21 21 Total $ 758 $ 594 Precontract costs are costs incurred to fulfill a contract prior to contract award. Precontract costs, including general and administrative expenses that are specifically chargeable to the customer, are deferred in inventories if we determine that the costs are probable of recovery under a specific anticipated contract. All other precontract costs, including start-up costs, are expensed as incurred. Costs that are deferred are recognized as contract costs upon the receipt of the anticipated contract. We included deferred precontract costs of $163 million and $101 million in inventories as work in process at December 31, 2018 and December 31, 2017
Deferred Commissions [Policy Text Block]	Deferred Commissions — Our incremental direct costs of obtaining a contract, which consist of sales commissions primarily for our security software sales at Forcepoint, are deferred and amortized over the period of contract performance or a longer period, generally the estimated life of the customer relationship, if renewals are expected and the renewal commission is not commensurate with the initial commission. We classify deferred commissions as current or noncurrent based on the timing of when we expect to recognize the expense. The current and noncurrent portions of deferred commissions are included in prepaid expenses and other current assets, and other assets, net, respectively, in our consolidated balance sheets. At December 31, 2018 and December 31, 2017 , we had deferred commissions of $55 million and $37 million , respectively. Amortization expense related to deferred commissions was $45 million , $28 million and $12 million in 2018 , 2017 and 2016
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 lease term 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 2018 , 2017 and 2016 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 group, the asset group is adjusted to its estimated fair value. In
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
Contract Liabilities [Policy Text Block]	Contract Liabilities —Our contract liabilities consist of advance payments and billings in excess of revenue recognized and deferred revenue. We may also receive up-front payments related to software license sales primarily for Forcepoint, which in most cases we recognize ratably over the license term. Our contract assets and liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. We classify advance payments and billings in excess of revenue recognized as current, and deferred revenue as current or noncurrent based on the timing of when we expect to recognize revenue. The noncurrent portion of deferred revenue is included in accrued retiree benefits and other long-term liabilities in our consolidated balance sheets. In order to determine revenue recognized in the period from contract liabilities, we first allocate revenue to the individual contract liability balance outstanding at the beginning of the period until the revenue exceeds that balance. If additional advances are received on those contracts in subsequent periods, we assume all revenue recognized in the reporting period first applies to the beginning contract liability as opposed to a portion applying to the new advances for the period.
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), other changes in accumulated other comprehensive income (loss) and additional contributions. Adjustments to the redemption value over the period from the date of acquisition to the redemption date are immediately recorded to retained earnings. We reflect the redemption value adjustments in the earnings per share (EPS) calculation if redemption value is in excess of the fair value of noncontrolling interest which resulted in a $0.01 favorable impact to both basic and diluted EPS in 2018 and a $0.01 unfavorable impact to both basic and diluted EPS in 2016 . There was no impact to basic or diluted EPS in 2017
Other Comprehensive Income (Loss) [Policy Text Block]	Other Comprehensive Income (Loss) —Other comprehensive income (loss) includes gains and losses associated with pension and PRB , foreign exchange translation adjustments, the effective portion of gains and losses on derivative instruments qualified as cash flow hedges, and unrealized gains (losses) on available-for-sale investments . The computation of other comprehensive income (loss) and its components are presented in the consolidated statements of comprehensive income. A rollforward of accumulated other comprehensive income (loss) was as follows: Pension and PRB plans, net (1) Foreign exchange translation Cash flow hedges (2) Unrealized gains (losses) on investments and other, net (3) Total (In millions) Balance at December 31, 2015 $ (7,088 ) $ (60 ) $ (16 ) $ (12 ) $ (7,176 ) Before tax amount (203 ) (115 ) 25 15 (278 ) Tax (expense) benefit 57 — (9 ) (5 ) 43 Net of tax amount (146 ) (115 ) 16 10 (235 ) Balance at December 31, 2016 (7,234 ) (175 ) — (2 ) (7,411 ) Before tax amount (651 ) 80 10 (1 ) (562 ) Tax (expense) benefit 42 — (4 ) — 38 Net of tax amount (609 ) 80 6 (1 ) (524 ) Balance at December 31, 2017 (7,843 ) (95 ) 6 (3 ) (7,935 ) Before tax amount 1,028 (36 ) (12 ) 1 981 Tax (expense) benefit (216 ) — 3 — (213 ) Net of tax amount 812 (36 ) (9 ) 1 768 Reclassification of stranded tax effects (1,452 ) — 1 — (1,451 ) Balance at December 31, 2018 $ (8,483 ) $ (131 ) $ (2 ) $ (2 ) $ (8,618 ) (1) Pension and PRB plans, net, is shown net of cumulative tax benefits of $2,255 million and $3,923 million at December 31, 2018 and December 31, 2017 , respectively. (2) Cash flow hedges are shown net of cumulative tax benefit of $1 million and tax expense of $3 million at December 31, 2018 and December 31, 2017 , respectively. (3) Unrealized gains (losses) on investments and other, net, are shown net of cumulative tax expense of $1 million at both December 31, 2018 and December 31, 2017 . On December 22, 2017, the President signed the 2017 Act, which reduced the U.S. corporate statutory federal tax rate to 21% for 2018. At December 31, 2017 the deferred tax amounts recorded through other comprehensive income prior to the enactment date using the prior 35% statutory tax rate remained in other comprehensive income despite the fact that the related deferred tax assets and liabilities were remeasured to reflect the newly enacted tax rate of 21%. These are referred to as stranded tax effects. Under Accounting Standards Update (ASU) 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income , we elected to reclassify these stranded tax effects from AOCL to retained earnings in the first quarter of 2018. See Accounting Standards, below, for additional details. After the enactment date, any deferred tax amounts recorded to other comprehensive income are recorded at the 21% tax rate. The income tax effects remaining in AOCL will be released into earnings as the related before tax amounts are reclassified to earnings. Other material amounts reclassified out of AOCL related to the amortization of net actuarial loss associated with our pension plans were $1,351 million , $1,177 million and $999 million before tax in 2018 , 2017 and 2016 , 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. We expect $3 million net of tax of net unrealized losses on our cash flow hedges at December 31, 2018 to be reclassified into earnings at then-current values over the next 12 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. Prior to the enactment of the 2017 Act, deferred taxes were not recognized for translation-related temporary differences of foreign subsidiaries as their undistributed earnings were considered to be indefinitely reinvested. After the enactment of the 2017 Act, we no longer assert indefinite reinvestment on our foreign subsidiaries outside basis differences generated after December 31, 2017. Unrealized foreign currency gains and losses associated with the subsidiary’s net assets, including unremitted earnings, represent translation gains and losses that are reported as part of other comprehensive income (loss). Therefore, the deferred tax effect of the translation gains and losses are also recorded through other comprehensive income (loss) after December 31, 2017. At December 31, 2018 , we had a cumulative translation loss on the unremitted earnings, and therefore, have not recorded a deferred tax asset as it is not likely that the asset will be realized in the future. Income and expenses in foreign currencies are translated at the average exchange rate during the period. Foreign exchange transaction gains and losses in 2018 , 2017 and 2016
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 until reduced to zero, with the remainder recorded as a reduction to retained earnings.
Pension and Other Postretirement Benefits (PRB) Costs [Policy Text Block]	Pension and Other Postretirement Benefits (PRB) Costs —We have pension plans covering the majority of our employees hired before January 1, 2007, 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. Pension and PRB expense is split between operating income and non-operating income, where only the service cost component is included in operating income and the non-service components are included in retirement benefits non-service expense. For purposes of determining retirement benefits non-service 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 (PBO) or the calculated “market-related value” of assets. We do not use a “corridor” approach in the calculation of Financial Accounting Standards (FAS) pension 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 PBO 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 generally 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 denominated in foreign currencies. 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. 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. We designate most foreign currency forward contracts as cash flow hedges of forecasted purchases and sales denominated in foreign currencies. 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. Realized gains and losses resulting from these cash flow hedges offset the foreign exchange gains and losses on the underlying transactions being hedged. We classify the cash flows from these instruments in the same category as the cash flows from the hedged items. To a lesser extent, we have gains and losses on derivatives not designated for hedge accounting or representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness, which are recognized currently in net sales or cost of sales. The aggregate notional amount of the outstanding foreign currency forward contracts was $1,772 million and $1,354 million at December 31, 2018 and December 31, 2017 , respectively. The net notional exposure of these contracts was $840 million and $525 million at December 31, 2018 and December 31, 2017 , respectively. The foreign currency forward contracts at December 31, 2018 have maturities at various dates through 2030 as follows: $1,145 million in 2019 ; $254 million in 2020 ; $189 million in 2021 ; and $184 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 forward contracts were $26 million and $34 million , respectively at December 31, 2018 and $28 million and $17 million , respectively at December 31, 2017 . The fair value of these derivatives is Level 2 in the fair value hierarchy because they are determined based on a market approach utilizing externally quoted forward rates for similar contracts. Our foreign currency forward contracts contain offset or netting provisions to mitigate credit risk in the event of counterparty default, including payment default and cross default. We measure and record the impact of counterparty credit risk into our valuation and at December 31, 2018 and December 31, 2017 , the fair value of our counterparty default exposure was less than $1 million and was spread across numerous highly rated counterparties. 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 at December 31, 2018 or December 31, 2017
Fair Values [Policy Text Block]	Fair Values— 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. The fair value hierarchy 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, 2018 and 2017 . 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), Short-term Investments, above (for short-term investments) and Derivative Financial Instruments, below (for 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, 2018 and 2017 . We did not have any material amounts of Level 3 assets or liabilities at December 31, 2018 and 2017
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 and net income attributable to Raytheon Company, and our actual weighted-average shares 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 EPS calculation as they are considered participating securities. As a result, we have included all of our outstanding unvested awards of restricted stock, as well as restricted stock units (RSUs) and Long-term Performance Plan (LTPP) awards that meet the retirement eligible criteria in our calculation of basic 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 awards of restricted stock and 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. As described in “Note 11: Forcepoint Joint Venture,” we record redeemable noncontrolling interest related to Vista Equity Partners’ interest in Forcepoint. We reflect the redemption value adjustments for redeemable noncontrolling interest in both the basic and diluted EPS calculation for the portion of redemption value that is in excess of the fair value of noncontrolling interest.
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 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. We account for forfeitures when they occur, consistent with our government recovery accounting practice. The 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 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% of total net sales in 2018 and 67% of total net sales in 2017 and 2016 . Total sales to customers outside the U.S., including foreign military sales through the U.S. government, were 30% of total net sales in 2018 and 32% of total net sales in 2017 and 2016 . 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 and geopolitical uncertainties, which may be driven by changes in threat environments, volatility in worldwide economic conditions, regional and local economic and political factors, U.S. foreign policy and other risks and uncertainties.
Remaining Performance Obligations [Policy Text Block]	Remaining Performance Obligations— Remaining performance obligations represents the transaction price of firm orders for which work has not been performed and excludes unexercised contract options and potential orders under ordering-type contracts (e.g., indefinite-delivery, indefinite-quantity (IDIQ)). As of December 31, 2018 , the aggregate amount of the transaction price allocated to remaining performance obligations was $42,420 million . We expect to recognize revenue on approximately half and three-quarters of the remaining performance obligations over the next 12 and 24 months, respectively, with the remainder recognized thereafter.
Accounting Standards [Policy Text Block]	Accounting Standards— In February 2018, the Financial Accounting Standards Board (FASB) issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income , which allows companies to reclassify stranded tax effects resulting from the 2017 Act, from accumulated other comprehensive income to retained earnings. These stranded tax effects refer to the tax amounts included in accumulated other comprehensive income at the previous 35% U.S. statutory tax rate, for which the related deferred tax asset or liability was remeasured to the new 21% U.S. corporate statutory federal tax rate in the period of the 2017 Act enactment. The new standard is effective for fiscal years beginning after December 15, 2018, with early adoption permitted, and can be applied either in the period of adoption or retrospectively to each period impacted by the 2017 Act. We elected to early adopt the new standard in the first quarter of 2018 and we elected to reclassify the stranded income tax effects of the 2017 Act from accumulated other comprehensive income to retained earnings in the period of adoption. This resulted in an increase to AOCL of $1,451 million and an increase in retained earnings of $1,451 million in the first quarter of 2018, almost all of which related to our pension and PRB plans, net. The standard did not have an impact on our results of operations or liquidity. Income tax effects remaining in accumulated other comprehensive income will be released into earnings as the related before tax amounts are reclassified to earnings. In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost , which changed certain presentation and disclosure requirements for employers that sponsor defined benefit pension and PRB plans. The new standard required the service cost component of the net benefit cost to be in the same line item as other compensation in operating income and the other components of net benefit cost to be presented outside of operating income on a retrospective basis. The new standard was effective for fiscal years beginning after December 15, 2017. We adopted the requirements of the new standard in the first quarter of 2018 on a retrospective basis for the presentation of only the service cost component in operating expenses, and the reclassification of the other components of the net benefit cost to retirement benefits non-service expense within non-operating (income) expense, net. The impact to our fiscal quarters and year-ended 2017 and year-ended 2016 financial results was as follows: Three Months Ended Twelve Months Ended (In millions) Dec 31, 2017 Oct 1, 2017 Jul 2, 2017 Apr 2, 2017 Dec 31, 2017 Dec 31, 2016 Cost of sales $ (186 ) $ (222 ) $ (164 ) $ (164 ) $ (736 ) $ (458 ) General and administrative expenses (44 ) (48 ) (42 ) (43 ) (177 ) (143 ) Total operating expenses (230 ) (270 ) (206 ) (207 ) (913 ) (601 ) Operating income 230 270 206 207 913 601 Total non-operating (income) expense, net 230 270 206 207 913 601 Income from continuing operations — — — — — — Net income $ — $ — $ — $ — $ — $ — The remaining provisions of ASU 2017-07 did not have a material impact on our financial position, results of operations or liquidity. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , which requires lessees to recognize a right-of-use asset and lease liability for most lease arrangements. The new standard is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements , which allows for an additional transition method under the modified retrospective approach for the adoption of Topic 842. The two permitted transition methods are now: (1) to apply the new lease requirements at the beginning of the earliest period presented, and (2) to apply the new lease requirements at the effective date. Under both transition methods there is a cumulative effect adjustment. We intend to adopt the standard on the effective date of January 1, 2019 by applying the new lease requirements at the beginning of the earliest period presented. We also intend to elect the package of practical expedients permitted under the transition guidance within the new standard, which, among other things, allows us to carry forward the historical lease classification. We have evaluated the changes from this ASU to our future financial reporting and disclosures, and have designed and implemented related processes and controls to address these changes. We expect the standard will result in the recognition of right-of-use assets of $0.8 billion and lease liabilities of $0.8 billion as of December 31, 2018, with immaterial changes to other balance sheet accounts. The standard will have no impact on our results of operations or liquidity. In addition, new disclosures will be provided to enable users to assess the amount, timing and uncertainty of cash flows arising from leases. Other new pronouncements issued but not effective until after December 31, 2018 are not expected to have a material impact on our financial position, results of operations or liquidity.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Net EAC adjustments	Net EAC adjustments had the following impact on our operating results: (In millions, except per share amounts) 2018 (1) 2017 2016 Operating income $ 492 $ 442 $ 418 Income from continuing operations attributable to Raytheon Company 389 287 283 Diluted EPS from continuing operations attributable to Raytheon Company $ 1.36 $ 0.98 $ 0.95 (1)
Schedule of Inventories	Inventories consisted of the following at December 31: (In millions) 2018 2017 Materials and purchased parts $ 75 $ 69 Work in process 662 504 Finished goods 21 21 Total $ 758 $ 594
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 Accumulated Other Comprehensive Income (Loss)	A rollforward of accumulated other comprehensive income (loss) was as follows: Pension and PRB plans, net (1) Foreign exchange translation Cash flow hedges (2) Unrealized gains (losses) on investments and other, net (3) Total (In millions) Balance at December 31, 2015 $ (7,088 ) $ (60 ) $ (16 ) $ (12 ) $ (7,176 ) Before tax amount (203 ) (115 ) 25 15 (278 ) Tax (expense) benefit 57 — (9 ) (5 ) 43 Net of tax amount (146 ) (115 ) 16 10 (235 ) Balance at December 31, 2016 (7,234 ) (175 ) — (2 ) (7,411 ) Before tax amount (651 ) 80 10 (1 ) (562 ) Tax (expense) benefit 42 — (4 ) — 38 Net of tax amount (609 ) 80 6 (1 ) (524 ) Balance at December 31, 2017 (7,843 ) (95 ) 6 (3 ) (7,935 ) Before tax amount 1,028 (36 ) (12 ) 1 981 Tax (expense) benefit (216 ) — 3 — (213 ) Net of tax amount 812 (36 ) (9 ) 1 768 Reclassification of stranded tax effects (1,452 ) — 1 — (1,451 ) Balance at December 31, 2018 $ (8,483 ) $ (131 ) $ (2 ) $ (2 ) $ (8,618 ) (1) Pension and PRB plans, net, is shown net of cumulative tax benefits of $2,255 million and $3,923 million at December 31, 2018 and December 31, 2017 , respectively. (2) Cash flow hedges are shown net of cumulative tax benefit of $1 million and tax expense of $3 million at December 31, 2018 and December 31, 2017 , respectively. (3) Unrealized gains (losses) on investments and other, net, are shown net of cumulative tax expense of $1 million at both December 31, 2018 and December 31, 2017
New Accounting Pronouncement, Impact, ASU 2017-07	The impact to our fiscal quarters and year-ended 2017 and year-ended 2016 financial results was as follows: Three Months Ended Twelve Months Ended (In millions) Dec 31, 2017 Oct 1, 2017 Jul 2, 2017 Apr 2, 2017 Dec 31, 2017 Dec 31, 2016 Cost of sales $ (186 ) $ (222 ) $ (164 ) $ (164 ) $ (736 ) $ (458 ) General and administrative expenses (44 ) (48 ) (42 ) (43 ) (177 ) (143 ) Total operating expenses (230 ) (270 ) (206 ) (207 ) (913 ) (601 ) Operating income 230 270 206 207 913 601 Total non-operating (income) expense, net 230 270 206 207 913 601 Income from continuing operations — — — — — — Net income $ — $ — $ — $ — $ — $ —

Earnings Per Share (EPS) (Table

Earnings Per Share (EPS) (Tables)	12 Months Ended
	Dec. 31, 2018
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: 2018 2017 2016 Basic EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 3.46 $ 3.18 $ 2.92 Undistributed earnings 6.70 3.77 4.63 Total $ 10.16 $ 6.95 $ 7.55 Diluted EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 3.45 $ 3.18 $ 2.92 Undistributed earnings 6.70 3.76 4.63 Total $ 10.15 $ 6.94 $ 7.55
Income Attributable to Participating Securities	Income attributable to participating securities was as follows: (In millions) 2018 2017 2016 Income from continuing operations attributable to participating securities $ 30 $ 24 $ 30 Income (loss) from discontinued operations, net of tax attributable to participating securities — — — Net income attributable to participating securities $ 30 $ 24 $ 30
Weighted-Average Shares Outstanding for Basic and Diluted EPS	The weighted-average shares outstanding for basic and diluted EPS were as follows: (In millions) 2018 2017 2016 Shares for basic EPS (1) 286.5 291.1 296.5 Effect of dilutive securities 0.3 0.3 0.3 Shares for diluted EPS 286.8 291.4 296.8 (1) Includes participating securities of 2.9 million , 3.5 million and 4.0 million for 2018 , 2017 and 2016

Acquisitions, Divestitures an_2

Acquisitions, Divestitures and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2018
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 Missile Systems Space and Airborne Systems Forcepoint (1) Total Balance at December 31, 2016 $ 1,702 $ 2,966 $ 4,154 $ 4,106 $ 1,860 $ 14,788 Acquisitions and divestitures — — — — 77 77 Effect of foreign exchange rates and other 4 1 — — 1 6 Balance at December 31, 2017 1,706 2,967 4,154 4,106 1,938 14,871 Acquisitions and divestitures — — — (3 ) — (3 ) Effect of foreign exchange rates and other (2 ) (2 ) — — — (4 ) Balance at December 31, 2018 $ 1,704 $ 2,965 $ 4,154 $ 4,103 $ 1,938 $ 14,864 (1) At December 31, 2018 , Forcepoint’s fair value was estimated to exceed its net book value by approximately $1 billion . As discussed in “Note 11: Forcepoint Joint Venture,” we are required to determine Forcepoint’s fair value on a quarterly basis due to the accounting related to the redeemable noncontrolling interest.

Receivables, Net (Tables)

Receivables, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Contracts Receivable [Abstract]
Schedule of Receivables, Net	Receivables, net, consisted of the following at December 31: (In millions) 2018 2017 U.S. government contracts (including foreign military sales) $ 1,121 $ 881 Other customers 539 451 Allowance for doubtful accounts (12 ) (8 ) Total receivables, net $ 1,648 $ 1,324

Contract Assets and Contract _2

Contract Assets and Contract Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Contract with Customer, Asset and Liability [Abstract]
Net Contract Assets (Liabilities)	Net contract assets (liabilities) consisted of the following at December 31: (In millions) 2018 2017 $ Change % Change Contract assets $ 5,594 $ 5,247 $ 347 6.6 % Contract liabilities—current (3,309 ) (2,927 ) (382 ) 13.1 % Contract liabilities—noncurrent (150 ) (127 ) (23 ) 18.1 % Net contract assets (liabilities) $ 2,135 $ 2,193 $ (58 ) (2.6 )%
Schedule of Contract Assets	Contract assets consisted of the following at December 31: (In millions) 2018 2017 U.S. government contracts (including foreign military sales): Unbilled $ 10,651 $ 10,748 Progress payments (6,338 ) (6,637 ) 4,313 4,111 Other customers: Unbilled 1,407 1,368 Progress payments (126 ) (232 ) 1,281 1,136 Total contract assets $ 5,594 $ 5,247

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Schedule Of Property Plant And Equipment Net	Property, plant and equipment, net, consisted of the following at December 31: (In millions) 2018 2017 Land $ 84 $ 85 Buildings and improvements 2,835 2,567 Machinery and equipment 4,844 4,621 Property, plant and equipment, gross 7,763 7,273 Accumulated depreciation and amortization (4,923 ) (4,834 ) Total $ 2,840 $ 2,439

Other Assets, Net (Tables)

Other Assets, Net (Tables)	12 Months Ended
	Dec. 31, 2018
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) 2018 2017 Marketable securities held in trust (1) $ 642 $ 633 Computer software, net of accumulated amortization of $1,201 and $1,150 at December 31, 2018 and 2017, respectively 261 288 Other intangible assets, net of accumulated amortization of $760 and $652 at December 31, 2018 and 2017, respectively 361 481 Deferred tax asset (2) 331 537 Other noncurrent assets, net 429 285 Total $ 2,024 $ 2,224 (1) For further details, refer to “Note 14: Pension and Other Employee Benefits.” (2) For further details, refer to “Note 15: Income Taxes.”

Commercial Paper and Long-ter_2

Commercial Paper and Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consisted of the following at December 31: (In millions, except percentages) 2018 2017 $500 notes due 2020, 4.40% $ 499 $ 499 $1,000 notes due 2020, 3.125% 998 996 $1,100 notes due 2022, 2.50% 1,096 1,095 $300 notes due 2024, 3.15% 298 297 $382 notes due 2027, 7.20% 373 372 $185 notes due 2028, 7.00% 185 185 $600 notes due 2040, 4.875% 592 592 $425 notes due 2041, 4.70% 419 419 $300 notes due 2044, 4.20% 295 295 Total debt issued and outstanding $ 4,755 $ 4,750
Fair Value of Long-term Debt	The estimated fair value of long-term debt was the following at December 31: (In millions) 2018 2017 Fair value of long-term debt $ 5,063 $ 5,293
Schedule of Long-term Debt Instruments	The adjustments to the principal amounts of long-term debt were as follows at December 31: (In millions) 2018 2017 Principal $ 4,792 $ 4,792 Unamortized issue discounts (30 ) (34 ) Unamortized interest rate lock costs (7 ) (8 ) Total $ 4,755 $ 4,750 The aggregate amounts of principal payments due on long-term debt for the next five years are: (In millions) 2019 $ — 2020 1,500 2021 — 2022 1,100 2023 — Thereafter 2,192

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Loss Contingencies [Line Items]
Schedule of Annual Rentals on a Lease Basis	At December 31, 2018 , we had commitments under long-term leases requiring annual rentals on a net lease basis as follows: (In millions) 2019 $ 215 2020 181 2021 157 2022 121 2023 85 Thereafter 200
Remediation Cost Estimates	Our estimates regarding remediation costs to be incurred were as follows at December 31: (In millions, except percentages) 2018 2017 Total remediation costs—undiscounted $ 193 $ 206 Weighted-average discount rate 5.1 % 5.2 % Total remediation costs—discounted $ 128 $ 142 Recoverable portion 82 92
Stated Values Outstanding, Guarantees, Letters of credit and Surety bonds	The stated values outstanding consisted of the following at December 31: (In millions) 2018 2017 Guarantees $ 201 $ 216 Letters of credit 2,503 2,416 Surety bonds 166 166
Environmental Remediation Costs [Member]
Loss Contingencies [Line Items]
Schedule of Environmental Remediation Costs	Environmental remediation costs expected to be incurred are: (In millions) 2019 $ 31 2020 15 2021 12 2022 11 2023 11 Thereafter 113

Forcepoint Joint Venture (Table

Forcepoint Joint Venture (Tables)	12 Months Ended
	Dec. 31, 2018
Redeemable Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest Rollforward	A rollforward of redeemable noncontrolling interest was as follows: (In millions) 2018 2017 Beginning balance $ 512 $ 449 Net income (loss) (27 ) (23 ) Other comprehensive income (loss), net of tax (1) (1 ) — Contribution from noncontrolling interest — 8 Adjustment of noncontrolling interest to redemption value (73 ) 78 Ending balance $ 411 $ 512 (1) Other comprehensive income (loss), net of tax, was income of less than $1 million in 2017

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
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) 2018 2017 2016 Beginning balance 288.4 292.8 299.0 Stock plans activity 0.9 1.1 1.5 Share repurchases (7.2 ) (5.5 ) (7.7 ) Ending balance 282.1 288.4 292.8
Repurchases of Common Stock	Our share repurchases were as follows: 2018 2017 2016 (In millions) $ Shares $ Shares $ Shares Shares repurchased under our share repurchase programs $ 1,325 6.7 $ 800 4.9 $ 900 6.9 Shares repurchased to satisfy tax withholding obligations 93 0.5 85 0.6 96 0.8 Total share repurchases $ 1,418 7.2 $ 885 5.5 $ 996 7.7

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2018
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) 2018 2017 2016 Stock-based compensation expense Restricted stock expense $ 98 $ 94 $ 96 RSU expense 32 28 26 LTPP expense 36 38 29 Total stock-based compensation expense $ 166 $ 160 $ 151 Stock-based tax benefit recognized 29 30 46
Restricted Stock Activity Disclosure	Restricted stock and RSU activity was as follows: Shares/units (in thousands) Weighted-average grant date fair value per share Outstanding at December 31, 2015 3,740 $ 87.57 Granted 1,128 124.08 Vested (1,407 ) 71.09 Forfeited (167 ) 98.61 Outstanding at December 31, 2016 3,294 106.56 Granted 1,025 152.93 Vested (1,194 ) 91.77 Forfeited (229 ) 120.33 Outstanding at December 31, 2017 2,896 127.98 Granted 774 212.96 Vested (977 ) 112.54 Forfeited (215 ) 150.67 Outstanding at December 31, 2018 2,478 $ 158.66 The total fair value of restricted stock and RSUs vested and the related tax benefit realized were as follows: (In millions) 2018 2017 2016 Fair value of restricted stock and RSUs vested $ 206 $ 193 $ 183 Tax benefit realized related to vested restricted stock/RSUs (1) 39 63 64 (1) Includes $18 million , $29 million and $32 million of excess tax benefits realized in 2018 , 2017 and 2016
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Assumptions Used	The assumptions used in the Monte Carlo model for the TSR portion of the LTPP awards granted during each year were as follows: 2018 2017 2016 Expected stock price volatility 16.87 % 18.74 % 18.60 % Peer group stock price volatility 18.41 % 20.01 % 20.06 % Correlations of returns 52.49 % 56.55 % 58.05 % Risk free interest rate 2.21 % 1.53 % 1.08 %
Long-Term Performance Plan Activity	LTPP award activity was as follows (1) : Units (in thousands) Weighted-average grant date fair value per share Outstanding at December 31, 2015 915 $ 80.83 Granted 167 123.31 Increase due to expected performance 205 89.62 Vested (590 ) 61.38 Forfeited (32 ) 105.52 Outstanding at December 31, 2016 665 110.32 Granted 142 152.29 Increase due to expected performance 193 125.14 Vested (273 ) 97.59 Forfeited (4 ) 137.57 Outstanding at December 31, 2017 723 127.16 Granted 117 205.76 Increase due to expected performance 71 135.27 Vested (303 ) 112.15 Forfeited (24 ) 164.58 Outstanding at December 31, 2018 584 $ 150.15 (1) This table excludes dividend equivalent units outstanding of 33 thousand at December 31, 2018 and 28 thousand at both December 31, 2017 and December 31, 2016 , based on expected performance at each reporting date. The total fair value of LTPP awards vested and the related tax benefit realized were as follows: (In millions) 2018 2017 2016 Fair value of LTPP awards vested $ 67 $ 44 $ 77 Tax benefit realized related to vested LTPP awards (1) 24 15 27 (1) Includes $13 million , $7 million and $15 million of excess tax benefits realized in 2018 , 2017 and 2016
Forcepoint
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Assumptions Used	The weighted-average assumptions used in the Black-Scholes model and the weighted-average grant date fair value for the Forcepoint awards granted were as follows: 2018 2017 2016 Unit Price $ 1,508.01 $ 1,101.31 $ 935.28 Expected life (in years) 3.01 2.29 4.24 Expected unit price volatility 43.66 % 49.51 % 54.65 % Risk free interest rate 2.69 % 1.46 % 1.12 % Dividend yield — % — % — % Grant date fair value $ 486.94 $ 339.72 $ 402.64

Pension and Other Employee Be_2

Pension and Other Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2018
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) 2018 2017 Domestic Pension Benefits plan $ 18,488 $ 20,075 Foreign Pension Benefits plan 833 927
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) 2018 2017 Marketable securities held in trust $ 642 $ 633
Schedule of Pension Contributions	We made the following contributions to our pension and PRB plans during the years ended December 31: (In millions) 2018 2017 2016 Required pension contributions $ 889 $ 615 $ 145 Discretionary pension contributions 1,250 1,000 500 PRB contributions 22 27 25 Total $ 2,161 $ 1,642 $ 670
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 2019 $ 2,008 $ 61 2020 1,878 60 2021 1,818 58 2022 1,744 55 2023 1,599 53 Thereafter (next 5 years) 7,612 231
Amounts Recognized on the Balance Sheets	Pension Benefits PRB Funded Status – Amounts Recognized on our Balance Sheets (in millions) December 31: 2018 2017 2018 2017 Noncurrent assets $ 126 $ 112 $ — $ — Current liabilities (150 ) (164 ) (18 ) (19 ) Noncurrent liabilities (6,111 ) (7,515 ) (354 ) (368 ) Net amount recognized on our balance sheets $ (6,135 ) $ (7,567 ) $ (372 ) $ (387 ) Pension Benefits PRB Reconciliation of Amounts Recognized on our Balance Sheets (in millions) December 31: 2018 2017 2018 2017 Accumulated other comprehensive loss: Prior service (cost) credit $ (27 ) $ (22 ) $ — $ — Net loss (10,590 ) (11,607 ) (121 ) (137 ) Accumulated other comprehensive loss (10,617 ) (11,629 ) (121 ) (137 ) Accumulated contributions in excess (below) net periodic benefit or cost 4,482 4,062 (251 ) (250 ) Net amount recognized on our balance sheets $ (6,135 ) $ (7,567 ) $ (372 ) $ (387 )
Sources of Change in Accumulated Other Comprehensive Loss	Pension Benefits PRB Sources of Change in Accumulated Other Comprehensive Loss (in millions) 2018 2017 2018 2017 Prior service (cost) credit arising during period $ (10 ) $ (15 ) $ — $ — Amortization of prior service cost (credit) included in net income 6 5 — (1 ) Net change in prior service (cost) credit not recognized in net income during the period (4 ) (10 ) — (1 ) Actuarial gain (loss) arising during period (630 ) (1,796 ) 4 (20 ) Amortization of net actuarial (gain) loss 1,351 1,177 11 10 Loss recognized due to settlements 286 2 1 1 Net change in actuarial gain (loss) not included in net income during the period 1,007 (617 ) 16 (9 ) Effect of exchange rates 9 (14 ) — — Total change in accumulated other comprehensive loss during period $ 1,012 $ (641 ) $ 16 $ (10 )
Adjustment to Accumulated Other Comprehensive Loss	The amounts in AOCL at December 31, 2018 expected to be recognized as components of net periodic pension or PRB expense in 2019 are as follows: (In millions) Pension Benefits PRB Amortization of net actuarial gain (loss) $ (1,092 ) $ (10 ) Amortization of prior service (cost) credit (5 ) — Total $ (1,097 ) $ (10 )
PBO and ABO Schedule	The PBO, ABO and asset values for our domestic qualified pension plans were as follows: (In millions) 2018 2017 PBO for domestic qualified pension plans $ 23,359 $ 26,150 ABO for domestic qualified pension plans 21,595 24,122 Asset values for domestic qualified pension plans 18,488 20,075
Schedule of Change In Projected Benefit Obligation	Pension Benefits PRB Change in Projected Benefit Obligation (in millions) 2018 2017 2018 2017 PBO at beginning of year $ 28,569 $ 25,787 $ 745 $ 737 Service cost 504 473 5 6 Interest cost 1,004 1,088 27 30 Plan participants’ contributions 6 8 49 35 Amendments 10 15 — — Plan settlements (474 ) (5 ) (10 ) (9 ) Actuarial loss (gain) (1,580 ) 3,085 (39 ) 41 Foreign exchange loss (gain) (56 ) 78 — — Benefits paid (2,527 ) (1,960 ) (105 ) (95 ) PBO at end of year $ 25,456 $ 28,569 $ 672 $ 745
Schedule of Change In Plan Assets	Pension Benefits PRB Change in Plan Assets (in millions) 2018 2017 2018 2017 Fair value of plan assets at beginning of year $ 21,002 $ 18,605 $ 358 $ 360 Actual return (loss) on plan assets (775 ) 2,666 (14 ) 40 Company contributions 2,139 1,615 22 27 Plan participants’ contributions 6 8 49 35 Plan settlements (474 ) (4 ) (10 ) (9 ) Foreign exchange gain (loss) (50 ) 72 — — Benefits paid (2,527 ) (1,960 ) (105 ) (95 ) Fair value of plan assets at end of year $ 19,321 $ 21,002 $ 300 $ 358
Retirement Plan Assumptions	Pension Benefits Weighted-Average Net Periodic Benefit Cost Assumptions 2018 2017 2016 Discount rate 3.68 % 4.31 % 4.45 % Expected long-term rate of return on plan assets 7.38 % 7.39 % 7.91 % Rate of compensation increase Range 2%–7% 2%–7% 2%–7% Average 4.43 % 4.43 % 4.42 % PRB Weighted-Average Net Periodic Benefit Cost Assumptions 2018 2017 2016 Discount rate 3.72 % 4.28 % 4.42 % Expected long-term rate of return on plan assets 6.25 % 6.25 % 6.99 % 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. Pension Benefits PRB Weighted-Average Year-End Benefit Obligation Assumptions 2018 2017 2018 2017 Discount rate 4.28 % 3.68 % 4.31 % 3.72 % 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 %
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 2018 , 2017 and 2016 is shown below. Percentile 2018 2017 2016 35 th 5.49 % 5.82 % 6.09 % 65 th 7.57 % 7.96 % 8.16 %
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, 2018 were as follows: Asset Category Global equity (combined U.S. and international equity) 30%-60% U.S. equities 20%-35% International equities 10%-25% Fixed income 20%-45% Cash and cash equivalents 0%-10% Private equity and private real estate funds 10%-20% Real assets 0%-4% Other (including absolute return funds) 5%-15%
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Components of Net Periodic Benefit Cost	Pension Benefits Components of Net Periodic Pension Expense (Income) (in millions) 2018 2017 2016 Operating expense Service cost $ 504 $ 473 $ 482 Non-operating expense Interest cost 1,004 1,088 1,089 Expected return on plan assets (1,435 ) (1,377 ) (1,505 ) Amortization of prior service cost 6 5 5 Amortization of net actuarial loss 1,351 1,177 999 Loss recognized due to settlements 286 1 3 Total pension non-service expense 1,212 894 591 Net periodic pension expense (income) $ 1,716 $ 1,367 $ 1,073
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Components of Net Periodic Benefit Cost	PRB Components of Net Periodic PRB Expense (Income) (in millions) 2018 2017 2016 Operating expense Service cost $ 5 $ 6 $ 6 Non-operating expense Interest cost 27 30 31 Expected return on plan assets (21 ) (21 ) (25 ) Amortization of prior service cost — (1 ) (1 ) Amortization of net actuarial loss 11 10 3 Loss recognized due to settlements 1 1 2 Total PRB non-service expense 18 19 10 Net periodic PRB expense (income) $ 23 $ 25 $ 16
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 consisted primarily of publicly-traded equity securities and publicly-traded fixed income securities. % of Plan Assets at Dec 31: Asset category 2018 2017 Fixed income securities 42 % 44 % U.S. equities 36 % 40 % International equities 10 % 10 % Cash and cash equivalents 12 % 6 % Total 100 % 100 %
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, 2018 and December 31, 2017 were as follows: December 31, 2018 (in millions) Total Level 1 Level 2 Level 3 Not subject to leveling (8) U.S. equities (1) $ 4,701 $ 2,189 $ — $ — $ 2,512 International equities (1) 3,141 2,522 4 — 615 Real assets (2) 53 — — — 53 Fixed income U.S. government and agency securities 1,923 1,727 196 — — Corporate debt securities/instruments (3) 2,907 329 2,088 — 490 Core fixed income (4) — — — — — Global multi-sector fixed income (5) 400 400 — — — Securitized and structured credit (6) 534 — — — 534 Cash and cash equivalents (7) 486 39 — — 447 Absolute return funds 1,432 — — — 1,432 Private equity funds 1,419 — — — 1,419 Private real estate funds 1,264 — — — 1,264 Insurance contracts 31 — — 31 — Total investments 18,291 7,206 2,288 31 8,766 Net receivables and payables 197 — — — 197 Total assets $ 18,488 $ 7,206 $ 2,288 $ 31 $ 8,963 December 31, 2017 (in millions) Total Level 1 Level 2 Level 3 Not subject to leveling (8) U.S. equities (1) $ 5,217 $ 2,631 $ — $ — $ 2,586 International equities (1) 3,784 2,613 1 — 1,170 Real assets (2) 100 79 — — 21 Fixed income U.S. government and agency securities 1,919 1,814 105 — — Corporate debt securities/instruments (3) 2,850 278 2,097 — 475 Core fixed income (4) 102 102 — — — Global multi-sector fixed income (5) 472 472 — — — Securitized and structured credit (6) 571 — — — 571 Cash and cash equivalents (7) 655 42 1 — 612 Absolute return funds 1,680 — — — 1,680 Private equity funds 1,416 — — — 1,416 Private real estate funds 1,203 — — — 1,203 Insurance contracts 30 — — 30 — Total investments 19,999 8,031 2,204 30 9,734 Net receivables and payables 76 — — — 76 Total assets $ 20,075 $ 8,031 $ 2,204 $ 30 $ 9,810 (1) U.S. and International equities primarily include investments across the spectrum of large, medium and small market capitalization stocks. (2) Real assets primarily include investments in physical and permanent assets, including infrastructure. (3) Corporate debt securities/instruments primarily include investments in investment grade and non-investment grade fixed income securities. (4) Core fixed income primarily includes investments in intermediate-term, high quality domestic securities issued by various governmental or private sector entities. (5) Global multi-sector fixed income primarily includes investments that invest globally among several sectors including governments, investment grade corporate bonds, high yield corporate bonds and emerging market securities. (6) Securitized and structured credit primarily includes investments 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. (7) Cash and cash equivalents are investments in highly liquid money market funds and bank sponsored collective 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. (8)

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The provision for federal and foreign income taxes consisted of the following: (In millions) 2018 2017 2016 Current income tax expense (benefit) Federal $ 245 $ 822 $ 713 Foreign 43 40 38 State — — (3 ) Deferred income tax expense (benefit) Federal (42 ) 235 118 Foreign 15 18 6 State 3 (1 ) 1 Total $ 264 $ 1,114 $ 873
Schedule of Effective Income Tax Rate Reconciliation	The expense for income taxes differed from the U.S. statutory rate due to the following: 2018 2017 2016 Statutory tax rate 21.0 % 35.0 % 35.0 % Foreign derived intangible income (FDII) (4.2 ) — — Research and development tax credit (R&D tax credit) (2.4 ) (1.5 ) (1.3 ) Equity compensation (1.0 ) (1.2 ) (1.6 ) Foreign income tax rate differential 1.3 0.2 — Prior year true-up (1.1 ) 0.1 — Tax benefit related to discretionary pension contributions (3.0 ) — — R&D tax credit claims related to the 2014-2017 tax years (2.1 ) — — Irish restructuring (2.0 ) — — Change in valuation allowance 2.0 — — Domestic manufacturing deduction benefit — (2.5 ) (2.7 ) Remeasurement of deferred taxes — 3.2 — One-time transition tax on previously undistributed foreign earnings — 2.3 — TRS SAS tax-free gain — — (1.8 ) Other items, net (0.1 ) 0.2 0.7 Effective tax rate 8.4 % 35.8 % 28.3 %
Schedule of domestic and foreign income from continuing operations before taxes	(In millions) 2018 2017 2016 Domestic income from continuing operations before taxes $ 2,937 $ 3,027 $ 2,964 Foreign income from continuing operations before taxes 210 86 121
Schedule of income taxes paid (received)	We made (received) the following net tax payments (refunds) during the years ended December 31: (In millions) 2018 2017 2016 Federal $ (69 ) $ 765 $ 710 Foreign 63 77 47 State 23 36 22
Schedule of Unrecognized Tax Benefits Roll Forward	A rollforward of our unrecognized tax benefits was as follows: (In millions) 2018 2017 2016 Unrecognized tax benefits, beginning of year $ 9 $ 7 $ 7 Additions based on current year tax positions 20 1 2 Additions based on prior year tax positions 68 4 1 Reductions based on prior year tax positions (5 ) (1 ) (3 ) Settlements based on prior year tax positions — (2 ) — Unrecognized tax benefits, end of year $ 92 $ 9 $ 7
Schedule of Deferred Tax Assets and Liabilities	Deferred income taxes consisted of the following at December 31: (In millions) 2018 2017 Noncurrent deferred tax assets (liabilities) Accrued employee compensation and benefits $ 209 $ 202 Other accrued expenses and reserves 77 86 Contract balances and inventories (494 ) (537 ) Pension benefits 1,306 1,505 Other retiree benefits 67 67 Net operating loss and tax credit carryforwards 83 99 Depreciation and amortization (827 ) (858 ) Partnership outside basis difference (29 ) (36 ) Other 21 21 Valuation allowance (84 ) (17 ) Deferred income taxes—noncurrent $ 329 $ 532

Business Segment Reporting (Tab

Business Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Operating Performance	Segment financial results were as follows: Total Net Sales (in millions) 2018 2017 2016 Integrated Defense Systems $ 6,180 $ 5,804 $ 5,529 Intelligence, Information and Services 6,722 6,177 6,169 Missile Systems 8,298 7,787 7,096 Space and Airborne Systems 6,748 6,430 6,182 Forcepoint 634 608 586 Eliminations (1,514 ) (1,423 ) (1,361 ) Total business segment sales 27,068 25,383 24,201 Acquisition Accounting Adjustments (10 ) (35 ) (77 ) Total $ 27,058 $ 25,348 $ 24,124 Intersegment Sales (in millions) 2018 2017 2016 Integrated Defense Systems $ 65 $ 64 $ 69 Intelligence, Information and Services 666 666 657 Missile Systems 161 132 122 Space and Airborne Systems 596 540 493 Forcepoint 26 21 20 Total $ 1,514 $ 1,423 $ 1,361 Operating Income (in millions) 2018 2017 2016 Integrated Defense Systems $ 1,023 $ 935 $ 971 Intelligence, Information and Services 538 455 467 Missile Systems 973 1,010 921 Space and Airborne Systems 884 862 808 Forcepoint 5 33 90 Eliminations (170 ) (148 ) (142 ) Total business segment operating income 3,253 3,147 3,115 Acquisition Accounting Adjustments (126 ) (160 ) (198 ) FAS/CAS Operating Adjustment 1,428 1,303 1,036 Corporate (17 ) (59 ) (57 ) Total $ 4,538 $ 4,231 $ 3,896 Intersegment Operating Income (in millions) 2018 2017 2016 Integrated Defense Systems $ 6 $ 5 $ 4 Intelligence, Information and Services 68 64 65 Missile Systems 15 13 12 Space and Airborne Systems 60 51 46 Forcepoint 21 15 15 Total $ 170 $ 148 $ 142
Components of FAS/CAS Operating Adjustment	The pension and PRB components of the FAS/CAS Operating Adjustment were as follows: (In millions) 2018 2017 2016 FAS/CAS Pension Operating Adjustment $ 1,415 $ 1,291 $ 1,026 FAS/CAS PRB Operating Adjustment 13 12 10 FAS/CAS Operating Adjustment $ 1,428 $ 1,303 $ 1,036
Schedules of Capital Expenditures and Depreciation and Amortization	Capital Expenditures (in millions) 2018 2017 2016 Integrated Defense Systems $ 242 $ 200 $ 135 Intelligence, Information and Services 46 22 59 Missile Systems 337 221 135 Space and Airborne Systems 136 158 149 Forcepoint 13 14 19 Corporate 24 19 29 Total (1) $ 798 $ 634 $ 526 (1) Total capital expenditures may not agree to our consolidated statements of cash flows due to non-cash transactions. Depreciation and Amortization (in millions) 2018 2017 2016 Integrated Defense Systems $ 98 $ 98 $ 88 Intelligence, Information and Services 51 50 65 Missile Systems 98 84 69 Space and Airborne Systems 140 132 122 Forcepoint 17 17 15 Acquisition Accounting Adjustments 116 125 121 Corporate 48 44 35 Total $ 568 $ 550 $ 515
Components of Identifiable Assets	Total Assets (in millions) 2018 2017 Integrated Defense Systems (1) $ 4,829 $ 4,679 Intelligence, Information and Services (1) 4,242 4,230 Missile Systems (1) 8,229 7,338 Space and Airborne Systems (1) 6,750 6,696 Forcepoint (1) 2,531 2,543 Corporate 5,283 5,374 Total $ 31,864 $ 30,860 (1)
Schedule of Property Plant and Equipment, Net, by Geographic Areas	Property, Plant and Equipment, Net, by Geographic Area (in millions) 2018 2017 United States $ 2,751 $ 2,362 All other (principally Europe) 89 77 Total $ 2,840 $ 2,439
Disaggregation of Revenue	We disaggregate our revenue from contracts with customers by geographic location, customer-type and contract-type for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. See details in the tables below. 2018 Disaggregation of Total Net Sales (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Other Total United States Sales to the U.S. government (1) Fixed-price contracts $ 818 $ 1,008 $ 2,953 $ 2,480 $ 118 $ — $ 7,377 Cost-type contracts 1,706 4,110 2,675 2,565 14 — 11,070 Direct commercial sales and other U.S. sales Fixed-price contracts 5 118 41 111 209 — 484 Cost-type contracts 1 18 — 3 — — 22 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 189 243 450 152 — — 1,034 Cost-type contracts 79 45 61 22 — — 207 Direct commercial sales and other foreign sales (1) Fixed-price contracts 711 198 173 211 70 — 1,363 Cost-type contracts 117 — 1 1 — — 119 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 849 20 452 237 — — 1,558 Cost-type contracts 170 5 23 69 — — 267 Direct commercial sales and other foreign sales (1) Fixed-price contracts 1,137 15 785 95 33 — 2,065 Cost-type contracts — — 96 — — — 96 All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 151 2 124 56 — — 333 Cost-type contracts 27 — 70 6 — — 103 Direct commercial sales and other foreign sales (1) Fixed-price contracts 145 230 231 144 154 — 904 Cost-type contracts 10 44 2 — — — 56 Total net sales 6,115 6,056 8,137 6,152 598 — 27,058 Intersegment sales 65 666 161 596 26 (1,514 ) — Acquisition Accounting Adjustments — — — — 10 (10 ) — Reconciliation to business segment sales $ 6,180 $ 6,722 $ 8,298 $ 6,748 $ 634 $ (1,524 ) $ 27,058 (1) Excludes foreign military sales through the U.S. government. 2018 Total Net Sales by Geographic Area (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total United States $ 2,530 $ 5,254 $ 5,669 $ 5,159 $ 341 $ 18,953 Asia/Pacific 1,096 486 685 386 70 2,723 Middle East and North Africa 2,156 40 1,356 401 33 3,986 All other (principally Europe) 333 276 427 206 154 1,396 Total net sales $ 6,115 $ 6,056 $ 8,137 $ 6,152 $ 598 $ 27,058 2018 Total Net Sales by Major Customer (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Sales to the U.S. government (1) $ 2,524 $ 5,118 $ 5,628 $ 5,045 $ 132 $ 18,447 U.S. direct commercial sales and other U.S. sales 6 136 41 114 209 506 Foreign military sales through the U.S. government 1,465 315 1,180 542 — 3,502 Foreign direct commercial sales and other foreign sales (1) 2,120 487 1,288 451 257 4,603 Total net sales $ 6,115 $ 6,056 $ 8,137 $ 6,152 $ 598 $ 27,058 (1) Excludes foreign military sales through the U.S. government. 2018 Total Net Sales by Contract Type (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Fixed-price contracts $ 4,005 $ 1,834 $ 5,209 $ 3,486 $ 584 $ 15,118 Cost-type contracts 2,110 4,222 2,928 2,666 14 11,940 Total net sales $ 6,115 $ 6,056 $ 8,137 $ 6,152 $ 598 $ 27,058 2017 Disaggregation of Total Net Sales (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Other Total United States Sales to the U.S. government (1) Fixed-price contracts $ 812 $ 1,090 $ 2,914 $ 2,233 $ 111 $ — $ 7,160 Cost-type contracts 1,507 3,576 1,991 2,614 12 — 9,700 Direct commercial sales and other U.S. sales Fixed-price contracts 6 130 1 51 202 — 390 Cost-type contracts 1 9 — 2 1 — 13 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 167 181 410 113 — — 871 Cost-type contracts 138 51 64 9 — — 262 Direct commercial sales and other foreign sales (1) Fixed-price contracts 596 193 309 284 59 — 1,441 Cost-type contracts 145 — 1 1 — — 147 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 1,066 18 371 191 — — 1,646 Cost-type contracts 154 1 22 30 — — 207 Direct commercial sales and other foreign sales (1) Fixed-price contracts 979 18 1,013 175 25 — 2,210 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 7 3 157 51 — — 218 Cost-type contracts 22 2 78 5 — — 107 Direct commercial sales and other foreign sales (1) Fixed-price contracts 128 209 320 131 142 — 930 Cost-type contracts 12 30 4 — — — 46 Total net sales 5,740 5,511 7,655 5,890 552 — 25,348 Intersegment sales 64 666 132 540 21 (1,423 ) — Acquisition Accounting Adjustments — — — — 35 (35 ) — Reconciliation to business segment sales $ 5,804 $ 6,177 $ 7,787 $ 6,430 $ 608 $ (1,458 ) $ 25,348 (1) Excludes foreign military sales through the U.S. government. 2017 Total Net Sales by Geographic Area (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total United States $ 2,326 $ 4,805 $ 4,906 $ 4,900 $ 326 $ 17,263 Asia/Pacific 1,046 425 784 407 59 2,721 Middle East and North Africa 2,199 37 1,406 396 25 4,063 All other (principally Europe) 169 244 559 187 142 1,301 Total net sales $ 5,740 $ 5,511 $ 7,655 $ 5,890 $ 552 $ 25,348 2017 Total Net Sales by Major Customer (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Sales to the U.S. government (1) $ 2,319 $ 4,666 $ 4,905 $ 4,847 $ 123 $ 16,860 U.S. direct commercial sales and other U.S. sales 7 139 1 53 203 403 Foreign military sales through the U.S. government 1,554 256 1,102 399 — 3,311 Foreign direct commercial sales and other foreign sales (1) 1,860 450 1,647 591 226 4,774 Total net sales $ 5,740 $ 5,511 $ 7,655 $ 5,890 $ 552 $ 25,348 (1) Excludes foreign military sales through the U.S. government. 2017 Total Net Sales by Contract Type (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Fixed-price contracts $ 3,761 $ 1,842 $ 5,495 $ 3,229 $ 539 $ 14,866 Cost-type contracts 1,979 3,669 2,160 2,661 13 10,482 Total net sales $ 5,740 $ 5,511 $ 7,655 $ 5,890 $ 552 $ 25,348 2016 Disaggregation of Total Net Sales (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Other Total United States Sales to the U.S. government (1) Fixed-price contracts $ 766 $ 1,170 $ 2,647 $ 2,321 $ 86 $ — $ 6,990 Cost-type contracts 1,473 3,357 1,902 2,345 16 — 9,093 Direct commercial sales and other U.S. sales Fixed-price contracts 13 167 2 20 193 — 395 Cost-type contracts 5 22 — 3 — — 30 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 136 180 328 107 — — 751 Cost-type contracts 119 77 70 6 — — 272 Direct commercial sales and other foreign sales (1) Fixed-price contracts 502 166 249 288 49 — 1,254 Cost-type contracts 175 — 1 — — — 176 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 816 60 387 148 — — 1,411 Cost-type contracts 153 3 25 1 — — 182 Direct commercial sales and other foreign sales (1) Fixed-price contracts 1,086 72 829 272 18 — 2,277 Cost-type contracts 1 — — — — — 1 All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 18 2 108 34 — — 162 Cost-type contracts 23 — 90 8 — — 121 Direct commercial sales and other foreign sales (1) Fixed-price contracts 162 206 333 136 127 — 964 Cost-type contracts 12 30 3 — — — 45 Total net sales 5,460 5,512 6,974 5,689 489 — 24,124 Intersegment sales 69 657 122 493 20 (1,361 ) — Acquisition Accounting Adjustments — — — — 77 (77 ) — Reconciliation to business segment sales $ 5,529 $ 6,169 $ 7,096 $ 6,182 $ 586 $ (1,438 ) $ 24,124 (1) Excludes foreign military sales through the U.S. government. 2016 Total Net Sales by Geographic Area (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total United States $ 2,257 $ 4,716 $ 4,551 $ 4,689 $ 295 $ 16,508 Asia/Pacific 932 423 648 401 49 2,453 Middle East and North Africa 2,056 135 1,241 421 18 3,871 All other (principally Europe) 215 238 534 178 127 1,292 Total net sales $ 5,460 $ 5,512 $ 6,974 $ 5,689 $ 489 $ 24,124 2016 Total Net Sales by Major Customer (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Sales to the U.S. government (1) $ 2,239 $ 4,527 $ 4,549 $ 4,666 $ 102 $ 16,083 U.S. direct commercial sales and other U.S. sales 18 189 2 23 193 425 Foreign military sales through the U.S. government 1,265 322 1,008 304 — 2,899 Foreign direct commercial sales and other foreign sales (1) 1,938 474 1,415 696 194 4,717 Total net sales $ 5,460 $ 5,512 $ 6,974 $ 5,689 $ 489 $ 24,124 (1) Excludes foreign military sales through the U.S. government. 2016 Total Net Sales by Contract Type (in millions) Integrated Defense Systems Intelligence, Information and Services Missile Systems Space and Airborne Systems Forcepoint Total Fixed-price contracts $ 3,499 $ 2,023 $ 4,883 $ 3,326 $ 473 $ 14,204 Cost-type contracts 1,961 3,489 2,091 2,363 16 9,920 Total net sales $ 5,460 $ 5,512 $ 6,974 $ 5,689 $ 489 $ 24,124

Quarterly Operating Results (_2

Quarterly Operating Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Schedule of Quarterly Financial Information	2018 (in millions, except per share amounts and workdays) First Second Third (3) Fourth Total net sales $ 6,267 $ 6,625 $ 6,806 $ 7,360 Gross margin 1,735 1,848 1,935 1,967 Income from continuing operations 624 790 641 828 Net income attributable to Raytheon Company 633 800 644 832 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 2.20 $ 2.78 $ 2.25 $ 2.93 Diluted 2.20 2.78 2.25 2.93 EPS attributable to Raytheon Company common stockholders (1) Basic 2.20 2.78 2.25 2.93 Diluted 2.19 2.78 2.25 2.93 Workdays (2) 64 64 63 58 2017 (in millions, except per share amounts and workdays) First Second Third Fourth (4) Total net sales $ 6,000 $ 6,281 $ 6,284 $ 6,783 Gross margin 1,634 1,760 1,816 1,798 Income from continuing operations 497 547 568 387 Net income attributable to Raytheon Company 506 553 572 393 EPS from continuing operations attributable to Raytheon Company common stockholders (1) Basic $ 1.73 $ 1.90 $ 1.97 $ 1.35 Diluted 1.73 1.89 1.97 1.35 EPS attributable to Raytheon Company common stockholders (1) Basic 1.74 1.90 1.97 1.35 Diluted 1.74 1.89 1.97 1.35 Workdays (2) 64 64 62 58 (1) EPS is computed independently for each of the quarters presented; therefore, the sum of the quarterly EPS may not equal the total computed for each year. (2) Number of workdays per our fiscal calendar, which excludes holidays and weekends. (3) In the third quarter of 2018, we recognized a non-cash pension settlement charge of $288 million for certain Raytheon-sponsored pension plans that purchased a group annuity contract from an insurance company to transfer some of our outstanding pension benefit obligations. (4) In the fourth quarter of 2017, we recorded a provisional tax-related expense of $171 million

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2018USD ($)Swap$ / shares	Sep. 30, 2018$ / shares	Jul. 01, 2018$ / shares	Apr. 01, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)Swap$ / shares	Oct. 01, 2017$ / shares	Jul. 02, 2017$ / shares	Apr. 02, 2017$ / shares	Dec. 31, 2018USD ($)Swap$ / shares	Dec. 31, 2017USD ($)Swap$ / shares	Dec. 31, 2016USD ($)$ / shares
Significant Accounting Policies [Line Items]
Performance obligations satisfied in previous periods									$ 636,000,000	$ 520,000,000	$ 509,000,000
Research and Development Expense									$ 841,000,000	700,000,000	725,000,000
Cash And Cash Equivalent Maturities Date									P90D
Restricted Cash and Cash Equivalents	$ 16,000,000				$ 12,000,000				$ 16,000,000	12,000,000
Unrealized Loss on Short-term Investments									(1,000,000)	1,000,000	(10,000,000)
Sales of short-term investments									0	0
Deferred precontract costs, work in process inventories	163,000,000				101,000,000				163,000,000	101,000,000
Deferred Commissions	55,000,000				$ 37,000,000				55,000,000	37,000,000
Amortization of Deferred Commissions									45,000,000	$ 28,000,000	$ 12,000,000
Capitalized Software Development Costs for Software Sold to Customers	$ 0								$ 0
Favorable (unfavorable) impact to EPS, Basic | $ / shares	$ 2.93	$ 2.25	$ 2.78	$ 2.20	$ 1.35	$ 1.97	$ 1.90	$ 1.74	$ 10.16	$ 6.96	$ 7.56
Favorable (unfavorable) impact to EPS, Diluted | $ / shares	$ 2.93	$ 2.25	$ 2.78	$ 2.19	$ 1.35	$ 1.97	$ 1.89	$ 1.74	$ 10.15	$ 6.95	$ 7.55
Amortization of net actuarial (gain) loss									$ 1,362,000,000	$ 1,187,000,000	$ 1,002,000,000
Cash Flow Hedge Loss to be Reclassified within Twelve Months	$ 3,000,000								$ 3,000,000
Number of years pension and PRB gain and losses spread									3 years
Remaining Performance Obligation	42,420,000,000								$ 42,420,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation									We expect to recognize revenue on approximately half and three-quarters of the remaining performance obligations over the next 12 and 24 months, respectively, with the remainder recognized thereafter.
Reclassification of stranded tax effects									$ 0
Minimum [Member]
Significant Accounting Policies [Line Items]
Operating Cycle									P1Y
Maximum [Member]
Significant Accounting Policies [Line Items]
Foreign currency forward contracts, off-set or netting provisions, fair value of counterparty default exposure	1,000,000				$ 1,000,000				$ 1,000,000	$ 1,000,000
Sales Revenue, Goods, Net [Member] | US Government Contacts Excluding FMS Sales [Member]
Significant Accounting Policies [Line Items]
Sales breakout									68.00%	67.00%	67.00%
Sales Revenue, Goods, Net [Member] | International Sales, including Foreign Military Sales [Member]
Significant Accounting Policies [Line Items]
Sales breakout									30.00%	32.00%	32.00%
Foreign Exchange Forward [Member]
Significant Accounting Policies [Line Items]
Derivative, Notional Amount	1,772,000,000				1,354,000,000				$ 1,772,000,000	$ 1,354,000,000
Foreign Currency Forward Contracts Net Exposure	$ 840,000,000				$ 525,000,000				840,000,000	$ 525,000,000
Foreign currency forward contracts maturing in next 12 months									1,145,000,000
Foreign currency forward contracts maturing in next two years									254,000,000
Foreign currency forward contracts maturing in next three years									189,000,000
Foreign currency forward contracts maturing in the next four years and thereafter									$ 184,000,000
Interest Rate Swap [Member]
Significant Accounting Policies [Line Items]
Interest rate swaps outstanding | Swap	0				0				0	0
Fair Value, Inputs, Level 2 [Member]
Significant Accounting Policies [Line Items]
Short-term Investments	$ 0				$ 297,000,000				$ 0	$ 297,000,000
Derivative Asset	26,000,000				28,000,000				26,000,000	28,000,000
Derivative Liability	34,000,000				$ 17,000,000				34,000,000	17,000,000
AOCI Attributable to Parent [Member]
Significant Accounting Policies [Line Items]
Reclassification of stranded tax effects				$ (1,451,000,000)					(1,451,000,000)
Retained Earnings [Member]
Significant Accounting Policies [Line Items]
Reclassification of stranded tax effects				$ 1,451,000,000					$ 1,451,000,000
Short-term Investments [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Unrealized Loss on Short-term Investments										$ 1,000,000
Redemption Value Adjustment in Excess of Fair Value [Member]
Significant Accounting Policies [Line Items]
Favorable (unfavorable) impact to EPS, Basic | $ / shares									$ 0.01	$ 0	$ (0.01)
Favorable (unfavorable) impact to EPS, Diluted | $ / shares									$ 0.01	$ 0	$ (0.01)
Computer Software [Member]
Significant Accounting Policies [Line Items]
Computer Software, net, estimated useful lives, in years									10 years
ASU 2016-02 [Member] | Assets, Total [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification									$ 800,000,000
ASU 2016-02 [Member] | Liabilities, Total [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification									(800,000,000)
Pension Plan [Member]
Significant Accounting Policies [Line Items]
Amortization of net actuarial (gain) loss									1,351,000,000	$ 1,177,000,000	$ 999,000,000
SAUDI ARABIA
Significant Accounting Policies [Line Items]
Remaining Performance Obligation	$ 2,200,000,000								$ 2,200,000,000
SAUDI ARABIA | Maximum [Member]
Significant Accounting Policies [Line Items]
Kingdom of Saudi Arabia net sales, as a percent of total net sales									5.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Net EAC adjustments) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in Accounting Estimate [Line Items]
Operating income									$ 4,538	$ 4,231	$ 3,896
Income from continuing operations attributable to Raytheon Company	$ 828	$ 641	$ 790	$ 624	$ 387	$ 568	$ 547	$ 497	$ 2,910	$ 2,022	$ 2,243
Diluted EPS from continuing operations attributable to Raytheon Company common stockholders	$ 2.93	$ 2.25	$ 2.78	$ 2.20	$ 1.35	$ 1.97	$ 1.89	$ 1.73	$ 10.15	$ 6.94	$ 7.55
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income									$ 492	$ 442	$ 418
Income from continuing operations attributable to Raytheon Company									$ 389	$ 287	$ 283
Diluted EPS from continuing operations attributable to Raytheon Company common stockholders									$ 1.36	$ 0.98	$ 0.95

Summary of Significant Accoun_6

Summary of Significant Accounting Policies (Inventories) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Inventory [Line Items]
Materials and purchased parts	$ 75	$ 69
Work in process	662	504
Finished goods	21	21
Total	$ 758	$ 594

Summary of Significant Accoun_7

Summary of Significant Accounting Policies (Property, Plant and Equipment, Net) (Details)	12 Months Ended
	Dec. 31, 2018
Machinery and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Machinery and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	45 years

Summary of Significant Accoun_8

Summary of Significant Accounting Policies (Accumulated Other Comprehensive Income) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Pension and PRB Plans, Net - Beginning balance	$ (7,843,000,000)	$ (7,234,000,000)	$ (7,088,000,000)
Pension and PRB plans, net - Before tax amount	1,028,000,000	(651,000,000)	(203,000,000)
Pension and PRB plans, net - Tax (expense) benefit	(216,000,000)	42,000,000	57,000,000
Pension and PRB plans, net - Net of tax amount	812,000,000	(609,000,000)	(146,000,000)
Pension and PRB plans, net, Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings	(1,452,000,000)
Accumulated Other Comprehensive Income (Loss), Pension and PRB Plans, Net - Ending balance	(8,483,000,000)	(7,843,000,000)	(7,234,000,000)
Accumulated Other Comprehensive Income (Loss), Foreign Exchange Translation - Beginning balance	(95,000,000)	(175,000,000)	(60,000,000)
Foreign exchange translation - Before tax amount	(36,000,000)	80,000,000	(115,000,000)
Foreign exchange translation - Tax (expense) benefit	0	0	0
Foreign exchange translation - Net of tax amount	(36,000,000)	80,000,000	(115,000,000)
Foreign exchange translation, Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings	0
Accumulated Other Comprehensive Income (Loss), Foreign Exchange Translation - Ending balance	(131,000,000)	(95,000,000)	(175,000,000)
Accumulated Other Comprehensive Income (Loss), Cash flow hedges - Beginning balance	6,000,000	0	(16,000,000)
Cash flow hedges - Before tax amount	(12,000,000)	10,000,000	25,000,000
Cash flow hedges - Tax (expense) benefit	3,000,000	(4,000,000)	(9,000,000)
Cash flow hedges - Net of tax amount	(9,000,000)	6,000,000	16,000,000
Cash flow hedges, Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings	1,000,000
Accumulated Other Comprehensive Income (Loss), Cash flow hedges - Ending balance	(2,000,000)	6,000,000	0
Accumulated Other Comprehensive Income (Loss), Unrealized gains (losses) on investments, and other, net - Beginning balance	(3,000,000)	(2,000,000)	(12,000,000)
Unrealized gains (losses) on investments and other, net - Before tax amount	1,000,000	(1,000,000)	15,000,000
Unrealized gains (losses) on investments and other, net - tax (expense) benefit	0	0	(5,000,000)
Unrealized gains (losses) on investments and other, net, net of tax amount	1,000,000	(1,000,000)	10,000,000
Unrealized gains (losses) on investments and other, net, Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings	0
Accumulated Other Comprehensive Income (Loss), Unrealized gains (losses) on investments, and other, net - Ending balance	(2,000,000)	(3,000,000)	(2,000,000)
Accumulated other comprehensive income (loss), net of tax, - Beginning balance	(7,935,000,000)	(7,411,000,000)	(7,176,000,000)
Other comprehensive income (loss) - Before tax amount	981,000,000	(562,000,000)	(278,000,000)
Other comprehensive income (loss) - Tax (expense) benefit	(213,000,000)	38,000,000	43,000,000
Other comprehensive income (loss), net of tax	768,000,000	(524,000,000)	(235,000,000)
Reclassification of stranded tax effects	(1,451,000,000)	0	0
Accumulated other comprehensive income (loss) net of tax, - Ending balance	(8,618,000,000)	(7,935,000,000)	$ (7,411,000,000)
Pension and PRB plans, net - cumulative tax benefit	2,255,000,000	3,923,000,000
Cash flow hedges - cumulative tax benefit (expense)	1,000,000	(3,000,000)
Unrealized gains (losses) on investments and other, net - cumulative tax benefit (expense)	$ (1,000,000)	$ (1,000,000)

Summary of Significant Accoun_9

Summary of Significant Accounting Policies (New Accounting Pronouncement, Impact, ASU 2017-07) (Details) - Accounting Standards Update 2017-07 [Member] - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Expenses	$ (230,000,000)	$ (270,000,000)	$ (206,000,000)	$ (207,000,000)	$ (913,000,000)	$ (601,000,000)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results	230,000,000	270,000,000	206,000,000	207,000,000	913,000,000	601,000,000
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	0	0	0	0	0	0
Cost of Sales [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Expenses	(186,000,000)	(222,000,000)	(164,000,000)	(164,000,000)	(736,000,000)	(458,000,000)
General and Administrative Expense [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Expenses	(44,000,000)	(48,000,000)	(42,000,000)	(43,000,000)	(177,000,000)	(143,000,000)
Nonoperating Income (Expense) [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	230,000,000	270,000,000	206,000,000	207,000,000	913,000,000	601,000,000
Continuing Operations [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0

Earnings Per Share (EPS) (Narra

Earnings Per Share (EPS) (Narrative) (Details) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share
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, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic EPS attributable to Raytheon Company common stockholders:
Distributed earnings									$ 3.46	$ 3.18	$ 2.92
Undistributed earnings									6.70	3.77	4.63
Total	$ 2.93	$ 2.25	$ 2.78	$ 2.20	$ 1.35	$ 1.97	$ 1.90	$ 1.73	10.16	6.95	7.55
Diluted EPS attributable to Raytheon Company common stockholders:
Distributed earnings									3.45	3.18	2.92
Undistributed earnings									6.70	3.76	4.63
Total	$ 2.93	$ 2.25	$ 2.78	$ 2.20	$ 1.35	$ 1.97	$ 1.89	$ 1.73	$ 10.15	$ 6.94	$ 7.55

Earnings Per Share (EPS) (Incom

Earnings Per Share (EPS) (Income from Participating Securities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share
Net income attributable to participating securities	$ 30	$ 24	$ 30
Continuing Operations [Member]
Earnings Per Share
Net income attributable to participating securities	30	24	30
Discontinued Operations [Member]
Earnings Per Share
Net income attributable to participating securities	$ 0	$ 0	$ 0

Earnings Per Share (EPS) (Weigh

Earnings Per Share (EPS) (Weighted-average Shares Outstanding for Basic and Diluted EPS) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares for basic EPS(1)	286.5	291.1	296.5
Effect of dilutive securities	0.3	0.3	0.3
Shares for diluted EPS	286.8	291.4	296.8
Shares for Diluted EPS, Participating Securities	2.9	3.5	4

Acquisitions, Divestitures an_3

Acquisitions, Divestitures and Goodwill (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Proceeds from sale of business, net of transaction costs	$ 11,000,000	$ 11,000,000	$ 0	$ 0
Gain (Loss) on Disposition of Business	8,000,000
Gain (Loss) on Disposition of Business, Net of Tax	$ 5,000,000
Payments for acquired companies, net of cash received		0	$ 93,000,000	$ 57,000,000
Vista Equity Partners contribution percentage			19.70%	19.70%
Goodwill, Acquired During Period		(3,000,000)	$ 77,000,000	$ 51,000,000
Finite-lived Intangible Assets Acquired			$ 12,000,000	$ 23,000,000
Tax deductible goodwill related to acquisitions		$ 62,000,000

Acquisitions, Divestitures an_4

Acquisitions, Divestitures and Goodwill (Rollforward of Goodwill by Segments) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Beginning balance	$ 14,871,000,000	$ 14,788,000,000
Acquisitions and divestitures	(3,000,000)	77,000,000	$ 51,000,000
Effect of foreign exchange rates and other	(4,000,000)	6,000,000
Ending Balance	14,864,000,000	14,871,000,000	14,788,000,000
Integrated Defense Systems
Goodwill [Roll Forward]
Beginning balance	1,706,000,000	1,702,000,000
Acquisitions and divestitures	0	0
Effect of foreign exchange rates and other	(2,000,000)	4,000,000
Ending Balance	1,704,000,000	1,706,000,000	1,702,000,000
Intelligence, Information and Services
Goodwill [Roll Forward]
Beginning balance	2,967,000,000	2,966,000,000
Acquisitions and divestitures	0	0
Effect of foreign exchange rates and other	(2,000,000)	1,000,000
Ending Balance	2,965,000,000	2,967,000,000	2,966,000,000
Missile Systems
Goodwill [Roll Forward]
Beginning balance	4,154,000,000	4,154,000,000
Acquisitions and divestitures	0	0
Effect of foreign exchange rates and other	0	0
Ending Balance	4,154,000,000	4,154,000,000	4,154,000,000
Space and Airborne Systems
Goodwill [Roll Forward]
Beginning balance	4,106,000,000	4,106,000,000
Acquisitions and divestitures	(3,000,000)	0
Effect of foreign exchange rates and other	0	0
Ending Balance	4,103,000,000	4,106,000,000	4,106,000,000
Forcepoint
Goodwill [Roll Forward]
Beginning balance	1,938,000,000	1,860,000,000
Acquisitions and divestitures	0	77,000,000
Effect of foreign exchange rates and other	0	1,000,000
Ending Balance	1,938,000,000	$ 1,938,000,000	$ 1,860,000,000
Estimated fair value in excess of book value	$ 1,000,000,000

Thales-Raytheon Systems Co. L_2

Thales-Raytheon Systems Co. Ltd. (TRS) Joint Venture (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Gain on sale of equity method investment	$ 0	$ 0	$ 158,000,000
Thales- Raytheon Systems Co. Ltd. (TRS) [Member]
Schedule of Equity Method Investments [Line Items]
Net payment to Thales S.A.			90,000,000
TRS SAS [Member]
Schedule of Equity Method Investments [Line Items]
Gain on sale of equity method investment			158,000,000
Retained Earnings [Member]
Schedule of Equity Method Investments [Line Items]
Reduction to retained earnings, before tax, related to the acquisition of RCCS LLC			167,000,000
Reduction to retained earnings, after tax, related to the acquisition of RCCS LLC			$ 197,000,000

Receivables, Net (Schedule of R

Receivables, Net (Schedule of Receivables, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
U.S. government contracts (including foreign military sales)	$ 1,121	$ 881
Receivables, net	1,648	1,324
Allowance for doubtful accounts	(12)	(8)
Other Customers [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, net	$ 539	$ 451

Contract Assets and Contract _3

Contract Assets and Contract Liabilities (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Contract with Customer, Asset and Liability [Abstract]
Change in contract liabilities, current	$ 382
Change in contract assets	347
Total contract value related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	2,300
Sales recognized for work performed to date related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	1,000
Advances received to date on contracts related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	850
Net contract assets related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	500
Net contract liabilities related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	350
Contract assets expected to be collected outside of one year	13
Retentions	103
Retentions to be collected next year	20
Revenue recognized on contract liabilities	$ 1,453	$ 1,434	$ 1,403

Contract Assets and Contract _4

Contract Assets and Contract Liabilities (Net Contract Assets (Liabilities)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Contract with Customer, Asset and Liability [Abstract]
Contract assets	$ 5,594	$ 5,247
Change in contract assets	$ 347
Percent change in contract assets	6.60%
Contract liabilities—current	$ (3,309)	(2,927)
Change in contract liabilities, current	$ (382)
Percent change in contract liabilities, current	13.10%
Contract liabilities—noncurrent	$ (150)	(127)
Change in contract liabilities, noncurrent	$ (23)
Percent change in contract liabilities, noncurrent	18.10%
Net contract assets (liabilities)	$ 2,135	$ 2,193
Change in net contract assets (liabilities)	$ (58)
Percent change in net contract assets (liabilities)	(2.60%)

Contract Assets and Contract _5

Contract Assets and Contract Liabilities (Schedule of Contract Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Contract Assets [Line Items]
Progress payments	$ (6,338)	$ (6,637)
Contract assets	5,594	5,247
U.S. Government [Member]
Contract Assets [Line Items]
Unbilled	10,651	10,748
Contract assets	4,313	4,111
Other Customers [Member]
Contract Assets [Line Items]
Unbilled	1,407	1,368
Progress payments	(126)	(232)
Contract assets	$ 1,281	$ 1,136

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation and amortization	$ 374	$ 350	$ 316

Property, Plant and Equipment_4

Property, Plant and Equipment, Net (Property, Plant and Equipment, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Land	$ 84	$ 85
Buildings and improvements	2,835	2,567
Machinery and equipment	4,844	4,621
Property, plant and equipment, gross	7,763	7,273
Accumulated depreciation and amortization	(4,923)	(4,834)
Property, plant and equipment, net	$ 2,840	$ 2,439

Other Assets, Net (Narrative) (

Other Assets, Net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Computer Software Amortization Expense	$ 75	$ 71	$ 68
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	174
Finite-Lived Intangible Assets, Amortization Expense, Year Two	135
Finite-Lived Intangible Assets, Amortization Expense, Year Three	99
Finite-Lived Intangible Assets, Amortization Expense, Year Four	59
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 27
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	15 years
Other Intangible Assets [Member]
Intangible assets amortization expense	$ 119	$ 129	$ 131

Other Assets, Net (Schedule of

Other Assets, Net (Schedule of Other Assets, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Marketable securities held in trust(1)	$ 642	$ 633
Computer software, net of accumulated amortization of $1,201 and $1,150 at December 31, 2018 and 2017, respectively	261	288
Other intangible assets, net of accumulated amortization of $760 and $652 at December 31, 2018 and 2017, respectively	361	481
Deferred tax asset(2)	331	537
Other noncurrent assets, net	429	285
Total	2,024	2,224
Computer Software, Accumulated Amortization	1,201	1,150
Other Intangible Assets, Accumulated Amortization	$ 760	$ 652

Commercial Paper and Long-ter_3

Commercial Paper and Long-term Debt (Narrative) (Details)	3 Months Ended	12 Months Ended
	Jul. 02, 2017USD ($)	Dec. 31, 2018USD ($)lenders	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Nov. 30, 2015USD ($)
Long-term Debt [Line Items]
Commercial paper		$ 300,000,000	$ 300,000,000
Commercial Paper, Weighted Average Interest Rate		2.954%	1.583%
Commercial Paper, Weighted Average Original Maturity Period		16 days	20 days
Commercial paper, maximum original maturity period		90 days
Repayments of Debt	$ 591,000,000
Loss on repayment of long-term debt	39,000,000	$ 0	$ 39,000,000	$ 0
Loss on repayment of long-term debt, net of tax	$ 25,000,000
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%
Borrowings outstanding on long-term line of credit		$ 0	0
Outstanding letters of credit		0	0
Line of Credit Facility, Remaining Borrowing Capacity		$ 950,000,000
Ratio of indebtedness to net capital		0.306
Total payments for interest on commercial paper and long-term debt		$ 194,000,000	$ 214,000,000	$ 231,000,000
Maximum [Member]
Long-term Debt [Line Items]
Ratio of indebtedness to net capital		0.60

Commercial Paper and Long-ter_4

Commercial Paper and Long-term Debt (Schedule of Notes Payable and Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Long-term Debt [Line Items]
Total debt issued and outstanding	$ 4,755	$ 4,750
$500 notes due 2020, 4.40%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.40%
Total debt issued and outstanding	$ 499	499
$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	$ 998	996
$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	$ 1,096	1,095
$300 notes due 2024, 3.15%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.15%
Total debt issued and outstanding	$ 298	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	$ 373	372
$185 notes due 2028, 7.00%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	7.00%
Total debt issued and outstanding	$ 185	185
$600 notes due 2040, 4.875%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.875%
Total debt issued and outstanding	$ 592	592
$425 notes due 2041, 4.70%
Long-term Debt [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.70%
Total debt issued and outstanding	$ 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	$ 295	$ 295

Commercial Paper and Long-ter_5

Commercial Paper and Long-term Debt (Fair value of long-term debt) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Fair value of long-term debt	$ 5,063	$ 5,293

Commercial Paper and Long-ter_6

Commercial Paper and Long-term Debt (Adjustments and payments to the Principal Amounts of Long-term Debt) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Long-term Debt [Line Items]
Principal	$ 4,792,000,000	$ 4,792,000,000
Unamortized issue discounts	(30,000,000)	(34,000,000)
Unamortized interest rate lock costs	(7,000,000)	(8,000,000)
Total	4,755,000,000	$ 4,750,000,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0
Long-term Debt, Maturities, Repayments of Principal in Year Two	1,500,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	1,100,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Five	0
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 2,192,000,000

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Rent expense	$ 232	$ 229	$ 239
Notional value of offset agreement with certain customers in foreign countries	9,700
Thales- Raytheon Systems Air and Missile Defense Command and Control S.A.S. (TRS AMDC2) [Member]
Loss Contingencies [Line Items]
Estimated liability related to guarantees and letters of credit	$ 3	$ 2

Commitments and Contingencies_3

Commitments and Contingencies (Schedule of Annual Rentals on a Net Lease Basis) (Details) $ in Millions	Dec. 31, 2018USD ($)
Lease Commitments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 215
Operating Leases, Future Minimum Payments Due in Two Years	181
Operating Leases, Future Minimum Payments Due in Three Years	157
Operating Leases, Future Minimum Payments Due in Four Years	121
Operating Leases, Future Minimum Payments, Due in Five Years	85
Operating Leases, Future Minimum Payments Due Thereafter	$ 200

Commitments and Contingencies_4

Commitments and Contingencies (Remediation Cost Estimates) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Total remediation costs—undiscounted	$ 193	$ 206
Weighted-average discount rate	5.10%	5.20%
Total remediation costs—discounted	$ 128	$ 142
Recoverable portion	$ 82	$ 92

Commitments and Contingencies_5

Commitments and Contingencies (Schedule of Environmental Remediation Costs) (Details) $ in Millions	Dec. 31, 2018USD ($)
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Next Twelve Months	$ 31
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Second Year	15
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Third Year	12
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Fourth Year	11
Accrual for Environmental Loss Contingencies, Undiscounted, Due in Fifth Year	11
Accrual for Environmental Loss Contingencies, Undiscounted, Due in after Fifth Year	$ 113

Commitments and Contingencies_6

Commitments and Contingencies (Stated Values Outstanding) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Guarantees	$ 201	$ 216
Letters of credit	2,503	2,416
Surety bonds	$ 166	$ 166

Forcepoint Joint Venture (Narra

Forcepoint Joint Venture (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Vista Equity Partners' Adjusted Equity Interest	19.50%
Redeemable Noncontrolling Interest, Estimated Redemption Value	$ 411	$ 512	$ 449
Redeemable Noncontrolling Interest, Carrying Value	$ 281

Forcepoint Joint Venture (Redee

Forcepoint Joint Venture (Redeemable Noncontrolling Interest Rollforward) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Beginning balance	$ 512,000,000	$ 449,000,000
Net income (loss)	(27,000,000)	(23,000,000)
Other comprehensive income (loss), net of tax(1)	(1,000,000)	0
Contribution from noncontrolling interest	0	8,000,000	$ 11,000,000
Adjustment of noncontrolling interest to redemption value	(73,000,000)	78,000,000
Ending balance	$ 411,000,000	512,000,000	$ 449,000,000
Maximum [Member]
Noncontrolling Interest [Line Items]
Other comprehensive income (loss), net of tax(1)		$ 1,000,000

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 30, 2017	Nov. 30, 2015
Stockholders' Equity [Line Items]
Available outstanding common stock under repurchase programs		$ 1,500,000,000
Additional paid-in capital		0	$ 0
Share repurchases recorded as a reduction to retained earnings		$ 1,418,000,000	$ 885,000,000	$ 996,000,000
Percentage Of Change In Dividends Paid Per Share	8.80%
Dividends declared per share		$ 3.47	$ 3.19	$ 2.93
Deferred Tax Liabilities, Other				$ 30,000,000
November Two Thousand Fifteen Board of Directors Authorization [Member]
Stockholders' Equity [Line Items]
Stock Repurchase Program, Authorized Amount						$ 2,000,000,000
November Two Thousand Seventeen Board of Directors Authorization [Member]
Stockholders' Equity [Line Items]
Stock Repurchase Program, Authorized Amount					$ 2,000,000,000
Retained Earnings [Member]
Stockholders' Equity [Line Items]
Share repurchases recorded as a reduction to retained earnings		$ 1,250,000,000	$ 724,000,000	435,000,000
Reduction to retained earnings, before tax, related to the acquisition of RCCS LLC				167,000,000
Reduction to retained earnings, after tax, related to the acquisition of RCCS LLC				$ 197,000,000

Stockholders' Equity (Changes i

Stockholders' Equity (Changes in Shares of Common Stock Outstanding) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Beginning balance	288.4	292.8	299
Stock plans activity	0.9	1.1	1.5
Share repurchases	(7.2)	(5.5)	(7.7)
Ending balance	282.1	288.4	292.8

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity, Class of Treasury Stock [Line Items]
Total Share Repurchases	$ 1,418	$ 885	$ 996
Total Share Repurchases	7.2	5.5	7.7
Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Total Share Repurchases	$ 1,325	$ 800	$ 900
Total Share Repurchases	6.7	4.9	6.9
Satisfy tax withholding [Member]
Equity, Class of Treasury Stock [Line Items]
Total Share Repurchases	$ 93	$ 85	$ 96
Total Share Repurchases	0.5	0.6	0.8

Stock-based Compensation Plan_2

Stock-based Compensation Plans (Narrative) (Details) - USD ($) shares in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2020	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under stock plans	41,800
Shares available for new awards	6,000
Shares outstanding	3,100
Compensation expense related to nonvested awards not yet recognized	$ 179,000,000
Compensation expense related to nonvested awards expected to be recognized over a weighted-average period, years	1 year 6 months
Expense attributable to vesting conditions	$ 166,000,000	$ 160,000,000	$ 151,000,000
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding	584	723	665		915
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	117	142	167
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	24	4	32
Expense attributable to vesting conditions	$ 36,000,000	$ 38,000,000	$ 29,000,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding	2,478	2,896	3,294		3,740
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	774	1,025	1,128
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	215	229	167
Expense attributable to vesting conditions	$ 98,000,000	$ 94,000,000	$ 96,000,000
Raytheon Company 2010 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under stock plans	7,500
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
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
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
Forcepoint
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under stock plans	174
Shares available for new awards	35
Expense attributable to vesting conditions	$ (1,000,000)	$ 13,000,000	$ 10,000,000
Forcepoint | Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding	21
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	8
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	3
Forcepoint | Profits interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding	116
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	29
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	15
Scenario, Forecast [Member] | Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance goals, Return on invested capital, weighted				50.00%
Performance goals, Total Shareholder Return, weighted				25.00%
Performance goals, Cumulative free cash flow, weighted				25.00%
Scenario, Forecast [Member] | Long-Term Performance Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target Award				0.00%
Scenario, Forecast [Member] | Long-Term Performance Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target Award				200.00%

Stock-based Compensation Plan_3

Stock-based Compensation Plans (Schedule of Stock-based Compensation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 166	$ 160	$ 151
Stock-based tax benefit recognized	29	30	46
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	98	94	96
Stock-based tax benefit recognized	39	63	64
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	32	28	26
Long-Term Performance Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	36	38	29
Stock-based tax benefit recognized	$ 24	$ 15	$ 27

Stock-based Compensation Plan_4

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, 2018	Dec. 31, 2017	Dec. 31, 2016
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	3,100
Tax benefit realized related to vested awards	$ 29	$ 30	$ 46
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	2,896	3,294	3,740
Granted	774	1,025	1,128
Vested	(977)	(1,194)	(1,407)
Forfeited	(215)	(229)	(167)
Outstanding at end of period	2,478	2,896	3,294
Weighted-average grant date fair value of stock outstanding at beginning of the period	$ 127.98	$ 106.56	$ 87.57
Weighted-average grant date fair value of stock granted	212.96	152.93	124.08
Weighted-average grant date fair value of stock vested	112.54	91.77	71.09
Weighted-average grant date fair value of stock forfeited	150.67	120.33	98.61
Weighted-average grant date fair value of stock outstanding at the end of the period	$ 158.66	$ 127.98	$ 106.56
Fair value of restricted stock and RSUs vested	$ 206	$ 193	$ 183
Tax benefit realized related to vested awards	39	63	64
Excess Tax Benefits Realized	$ 18	$ 29	$ 32

Stock-based Compensation Plan_5

Stock-based Compensation Plans (Assumptions used in Monte Carlo Model) (Details) - Long-Term Performance Plan [Member]	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected stock price volatility	16.87%	18.74%	18.60%
Peer group stock price volatility	18.41%	20.01%	20.06%
Correlations of returns	52.49%	56.55%	58.05%
Risk free interest rate	2.21%	1.53%	1.08%

Stock-based Compensation Plan_6

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, 2018	Dec. 31, 2017	Dec. 31, 2016
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	3,100
Tax benefit realized related to vested awards	$ 29	$ 30	$ 46
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	723	665	915
Granted	117	142	167
Increase due to expected performance	71	193	205
Vested	(303)	(273)	(590)
Forfeited	(24)	(4)	(32)
Outstanding at end of period	584	723	665
Weighted-average grant date fair value of stock outstanding at beginning of the period	$ 127.16	$ 110.32	$ 80.83
Weighted-average grant date fair value of stock granted	205.76	152.29	123.31
Weighted-average grant date fair value of long-term performance plan stock increase due to expected performance	135.27	125.14	89.62
Weighted-average grant date fair value of stock vested	112.15	97.59	61.38
Weighted-average grant date fair value of stock forfeited	164.58	137.57	105.52
Weighted-average grant date fair value of stock outstanding at the end of the period	$ 150.15	$ 127.16	$ 110.32
Fair value of LTPP awards vested	$ 67	$ 44	$ 77
Tax benefit realized related to vested awards	24	15	27
Excess Tax Benefits Realized	$ 13	$ 7	$ 15
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	28	28
Outstanding at end of period	33	28	28

Stock-based Compensation Plan_7

Stock-based Compensation Plans (Assumptions used in Black-Scholes Model) (Details) - Forcepoint - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit Price	$ 1,508.01	$ 1,101.31	$ 935.28
Expected life (in years)	3 years 3 days	2 years 3 months 14 days	4 years 2 months 26 days
Expected unit price volatility	43.66%	49.51%	54.65%
Risk free interest rate	2.69%	1.46%	1.12%
Dividend yield	0.00%	0.00%	0.00%
Grant date fair value	$ 486.94	$ 339.72	$ 402.64

Pension and Other Employee Be_3

Pension and Other Employee Benefits (Narrative) (Details)	3 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jul. 31, 2018USD ($)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Contribution Plan, expense for contributions		$ 326,000,000	$ 303,000,000	$ 286,000,000
Amount invested in defined contribution plan		17,000,000,000	18,400,000,000
Discretionary pension contributions	$ 1,250,000,000	1,250,000,000	1,000,000,000	500,000,000
Net Periodic Benefit Cost (Credit), Loss Due to Settlement	288,000,000
Net Periodic Benefit Cost (Credit), Loss Due to Settlement, Net of Tax	$ 228,000,000
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation		24,561,000,000	27,084,000,000
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets		18,300,000,000	19,405,000,000
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation		22,554,000,000	24,795,000,000
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets		18,300,000,000	19,405,000,000
Accumulated Benefit Obligation (ABO)		$ 23,447,000,000	26,276,000,000
Health care trend rate increase or decrease		1.00%
Effect of a 1% increase in assumed health care trend rate - accumulated postretirement benefit obligation		$ 4,000,000
Effect of a 1% decrease in assumed health care trend rate - accumulated postretirement benefit obligation		4,000,000
Defined Benefit Plan Assets invested in eight indices		2,500,000,000
FMV of Plan's derivatives		6,000,000	3,000,000
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined benefit plan, liabilities, noncurrent		6,111,000,000	7,515,000,000
Defined Benefit Plan, Amount of Current Year Discretionary Contribution Elected to Apply to Offset Required Contributions in Next Two Fiscal Years		1,000,000,000
Required contributions to pension plans expected		356,000,000
Net Periodic Benefit Expense (Income)		1,716,000,000	1,367,000,000	1,073,000,000
Projected benefit obligation		25,456,000,000	28,569,000,000	25,787,000,000
Net Periodic Benefit Cost (Credit), Loss Due to Settlement		$ 286,000,000	$ 1,000,000	$ 3,000,000
Discount rate		4.28%	3.68%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		7.38%	7.39%	7.91%
Defined Benefit Plan, Plan Assets, Amount		$ 19,321,000,000	$ 21,002,000,000	$ 18,605,000,000
Certain pension plans included as part of group annuity contract transfer [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Projected benefit obligation					$ 923,000,000
Group Annuity Contract, Number of U.S. Retirees and Beneficiaries					13,000
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined benefit plan, liabilities, noncurrent		354,000,000	368,000,000
Required contributions to pension plans expected		30,000,000
Net Periodic Benefit Expense (Income)		23,000,000	25,000,000	16,000,000
Projected benefit obligation		672,000,000	745,000,000	737,000,000
Net Periodic Benefit Cost (Credit), Loss Due to Settlement		$ 1,000,000	$ 1,000,000	$ 2,000,000
Discount rate		4.31%	3.72%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		6.25%	6.25%	6.99%
Defined Benefit Plan, Plan Assets, Amount		$ 300,000,000	$ 358,000,000	$ 360,000,000
Domestic Pension Benefits Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Projected benefit obligation		$ 24,656,000,000	$ 27,661,000,000
Discount rate		4.33%	3.72%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		7.50%	7.50%	8.00%
Actual return on assets		(4.00%)	15.00%	6.00%
Defined Benefit Plan, Plan Assets, Amount		$ 18,488,000,000	$ 20,075,000,000
Foreign Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Net Periodic Benefit Expense (Income)		(8,000,000)	2,000,000	$ (4,000,000)
Projected benefit obligation		800,000,000	908,000,000
Defined Benefit Plan, Plan Assets, Amount		$ 833,000,000	$ 927,000,000
50th percentile [Member] | Domestic Pension Benefits Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		6.74%	6.89%	7.12%
Master Trust [Member] | PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 141,000,000	$ 165,000,000
Executive Officer [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined benefit plan, liabilities, noncurrent		36,000,000	38,000,000
Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Marketable securities held in trust		642,000,000	633,000,000
Level 1 [Member] | Domestic Pension Benefits Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount		7,206,000,000	8,031,000,000
Level 3 [Member] | VEBA [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0
Level 3 [Member] | Domestic Pension Benefits Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount		31,000,000	30,000,000
Nonqualified Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Liabilities related to nonqualified defined contribution plan		431,000,000	422,000,000
Nonqualified Plan [Member] | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Marketable securities held in trust		420,000,000	410,000,000
Raytheon Stock Fund [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Amount invested in defined contribution plan		$ 1,600,000,000	$ 2,100,000,000
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%
Defined Benefit Plan, Effect of One Percentage Point Increase or Decrease on Service and Interest Cost Components		$ 1,000,000
Individual investment, excluding funds that track to an index, percentage of total plan		5.00%

Pension and Other Employee Be_4

Pension and Other Employee Benefits (Fair value of plan assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Domestic Pension Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 18,488	$ 20,075
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 833	$ 927

Pension and Other Employee Be_5

Pension and Other Employee Benefits (Marketable securities held in trust) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Inputs, Level 1 [Member]
Marketable Securities [Line Items]
Marketable securities held in trust	$ 642	$ 633

Pension and Other Employee Be_6

Pension and Other Employee Benefits (Pension Contributions) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plans and PRB Plans [Line Items]
Required pension contributions		$ 889	$ 615	$ 145
Discretionary pension contributions	$ 1,250	1,250	1,000	500
PRB contributions		22	27	25
Payment for Pension and Other Postretirement Benefits		$ 2,161	$ 1,642	$ 670

Pension and Other Employee Be_7

Pension and Other Employee Benefits (Pension Benefits Expected to be Paid from Plans or Companies Assets) (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 2,008
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	1,878
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	1,818
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	1,744
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	1,599
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	7,612
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	61
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	60
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	58
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	55
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	53
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 231

Pension and Other Employee Be_8

Pension and Other Employee Benefits (Schedule of Components of Net Periodic Benefit Expense (Income) Pension) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Non-operating expense
Loss recognized due to settlements	$ 288
Total non-service expense		$ 1,230	$ 913	$ 601
Pension Plan [Member]
Operating expense
Service cost		504	473	482
Non-operating expense
Interest cost		1,004	1,088	1,089
Expected return on plan assets		(1,435)	(1,377)	(1,505)
Amortization of prior service cost		6	5	5
Amortization of net actuarial loss		1,351	1,177	999
Loss recognized due to settlements		286	1	3
Total non-service expense		1,212	894	591
Net periodic expense (income)		$ 1,716	$ 1,367	$ 1,073

Pension and Other Employee Be_9

Pension and Other Employee Benefits (Schedule of Components of Net Periodic Benefit Expense (Income) PRB Benefits) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Non-operating expense
Loss recognized due to settlements	$ 288
Total non-service expense		$ 1,230	$ 913	$ 601
PRB [Member]
Operating expense
Service cost		5	6	6
Non-operating expense
Interest cost		27	30	31
Expected return on plan assets		(21)	(21)	(25)
Amortization of prior service cost		0	(1)	(1)
Amortization of net actuarial loss		11	10	3
Loss recognized due to settlements		1	1	2
Total non-service expense		18	19	10
Net periodic expense (income)		$ 23	$ 25	$ 16

Pension and Other Employee B_10

Pension and Other Employee Benefits (Schedule of Funded Status Amounts Recognized on our Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Noncurrent assets	$ 126	$ 112
Current liabilities	(150)	(164)
Noncurrent liabilities	(6,111)	(7,515)
Net amount recognized on our balance sheets	(6,135)	(7,567)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Noncurrent assets	0	0
Current liabilities	(18)	(19)
Noncurrent liabilities	(354)	(368)
Net amount recognized on our balance sheets	$ (372)	$ (387)

Pension and Other Employee B_11

Pension and Other Employee Benefits (Schedule of Reconciliation of Amounts on our Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit	$ (27)	$ (22)
Net loss	(10,590)	(11,607)
Accumulated other comprehensive loss	(10,617)	(11,629)
Accumulated contributions in excess (below) net periodic benefit or cost	4,482	4,062
Net amount recognized on our balance sheets	(6,135)	(7,567)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit	0	0
Net loss	(121)	(137)
Accumulated other comprehensive loss	(121)	(137)
Accumulated contributions in excess (below) net periodic benefit or cost	(251)	(250)
Net amount recognized on our balance sheets	$ (372)	$ (387)

Pension and Other Employee B_12

Pension and Other Employee Benefits (Source of Change in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit arising during period	$ (10)	$ (15)	$ (1)
Amortization of prior service cost (credit) included in net income	6	4	4
Actuarial gain (loss) arising during period	(626)	(1,816)	(1,238)
Amortization of net actuarial (gain) loss	1,362	1,187	1,002
Pension and other postretirement benefit plans, net	1,028	(651)	(203)
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit arising during period	(10)	(15)
Amortization of prior service cost (credit) included in net income	6	5
Net change in prior service (cost) credit not recognized in net income during the period	(4)	(10)
Actuarial gain (loss) arising during period	(630)	(1,796)
Amortization of net actuarial (gain) loss	1,351	1,177	$ 999
Loss recognized due to settlements	286	2
Net change in actuarial gain (loss) not included in net income during the period	1,007	(617)
Effect of exchange rates	9	(14)
Pension and other postretirement benefit plans, net	1,012	(641)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Prior service (cost) credit arising during period	0	0
Amortization of prior service cost (credit) included in net income	0	(1)
Net change in prior service (cost) credit not recognized in net income during the period	0	(1)
Actuarial gain (loss) arising during period	4	(20)
Amortization of net actuarial (gain) loss	11	10
Loss recognized due to settlements	1	1
Net change in actuarial gain (loss) not included in net income during the period	16	(9)
Effect of exchange rates	0	0
Pension and other postretirement benefit plans, net	$ 16	$ (10)

Pension and Other Employee B_13

Pension and Other Employee Benefits (Adjustment to Accumulated Other Comprehensive Loss) (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Amortization of net actuarial gain (loss)	$ (1,092)
Amortization of prior service (cost) credit	(5)
Total	(1,097)
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Amortization of net actuarial gain (loss)	(10)
Amortization of prior service (cost) credit	0
Total	$ (10)

Pension and Other Employee B_14

Pension and Other Employee Benefits (PBO & ABO Schedule) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and PRB Plans [Line Items]
ABO for domestic qualified pension plans	$ 23,447	$ 26,276
Domestic Qualified Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
PBO for domestic qualified pension plans	23,359	26,150
ABO for domestic qualified pension plans	21,595	24,122
Asset values for domestic qualified pension plans	$ 18,488	$ 20,075

Pension and Other Employee B_15

Pension and Other Employee Benefits (Schedule of Change in Projected Benefit Obligation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
PBO at beginning of year	$ 28,569	$ 25,787
Service cost	504	473	$ 482
Interest cost	1,004	1,088	1,089
Plan participants’ contributions	6	8
Amendments	10	15
Plan settlements	(474)	(5)
Actuarial loss (gain)	(1,580)	3,085
Foreign exchange loss (gain)	(56)	78
Benefits paid	(2,527)	(1,960)
PBO at end of year	25,456	28,569	25,787
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
PBO at beginning of year	745	737
Service cost	5	6	6
Interest cost	27	30	31
Plan participants’ contributions	49	35
Amendments	0	0
Plan settlements	(10)	(9)
Actuarial loss (gain)	(39)	41
Foreign exchange loss (gain)	0	0
Benefits paid	(105)	(95)
PBO at end of year	$ 672	$ 745	$ 737

Pension and Other Employee B_16

Pension and Other Employee Benefits (Schedule of Change in Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Fair value of plan assets at beginning of year	$ 21,002	$ 18,605
Actual return (loss) on plan assets	(775)	2,666
Company contributions	2,139	1,615
Plan participants’ contributions	6	8
Plan settlements	(474)	(4)
Foreign exchange gain (loss)	(50)	72
Benefits paid	(2,527)	(1,960)
Fair value of plan assets at end of year	19,321	21,002
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Fair value of plan assets at beginning of year	358	360
Actual return (loss) on plan assets	(14)	40
Company contributions	22	27
Plan participants’ contributions	49	35
Plan settlements	(10)	(9)
Foreign exchange gain (loss)	0	0
Benefits paid	(105)	(95)
Fair value of plan assets at end of year	$ 300	$ 358

Pension and Other Employee B_17

Pension and Other Employee Benefits (Schedule of Weighted-Average Net Periodic Benefit Cost Assumptions) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	3.68%	4.31%	4.45%
Expected long-term rate of return on plan assets	7.38%	7.39%	7.91%
Pension Plan [Member] | Minimum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	2.00%	2.00%	2.00%
Pension Plan [Member] | Maximum [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	7.00%	7.00%	7.00%
Pension Plan [Member] | Weighted Average [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	4.43%	4.43%	4.42%
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	3.72%	4.28%	4.42%
Expected long-term rate of return on plan assets	6.25%	6.25%	6.99%
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 B_18

Pension and Other Employee Benefits (Schedule of Weighted-Average Year-End Benefit Obligation Assumptions) (Details)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	4.28%	3.68%
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	4.31%	3.72%
Health care trend rate	4.00%	4.00%	4.00%
Minimum [Member] | Pension Plan [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 Plan [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 Plan [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 B_19

Pension and Other Employee Benefits (Long-term returns used in ROA assumptions) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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 Rate of Return on Plan Assets	5.49%	5.82%	6.09%
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 Rate of Return on Plan Assets	7.57%	7.96%	8.16%

Pension and Other Employee B_20

Pension and Other Employee Benefits (Schedule of Investment Allocation Ranges) (Details)	Dec. 31, 2018
Minimum [Member] | Global equity
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	30.00%
Minimum [Member] | U.S. equities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	20.00%
Minimum [Member] | International equities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	10.00%
Minimum [Member] | Fixed income securities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	20.00%
Minimum [Member] | Cash and cash equivalents
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	0.00%
Minimum [Member] | Private equity and private real estate funds
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	10.00%
Minimum [Member] | Real assets
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	0.00%
Minimum [Member] | Other (including absolute return funds)
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	5.00%
Maximum [Member] | Global equity
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	60.00%
Maximum [Member] | U.S. equities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	35.00%
Maximum [Member] | International equities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	25.00%
Maximum [Member] | Fixed income securities
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	45.00%
Maximum [Member] | Cash and cash equivalents
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	10.00%
Maximum [Member] | Private equity and private real estate funds
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	20.00%
Maximum [Member] | Real assets
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	4.00%
Maximum [Member] | Other (including absolute return funds)
Defined Benefit Plans and PRB Plans [Line Items]
Investment policy asset allocation ranges minimum	15.00%

Pension and Other Employee B_21

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, 2018	Dec. 31, 2017
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 18,488	$ 20,075
Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	7,206	8,031
Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,288	2,204
Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	31	30
Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	8,963	9,810
U.S. equities(1)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4,701	5,217
U.S. equities(1) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,189	2,631
U.S. equities(1) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. equities(1) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. equities(1) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,512	2,586
International equities(1)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	3,141	3,784
International equities(1) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,522	2,613
International equities(1) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4	1
International equities(1) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International equities(1) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	615	1,170
Real assets(2)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	53	100
Real assets(2) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	79
Real assets(2) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Real assets(2) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Real assets(2) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	53	21
U.S. government and agency securities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,923	1,919
U.S. government and agency securities | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,727	1,814
U.S. government and agency securities | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	196	105
U.S. government and agency securities | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. government and agency securities | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Corporate debt securities/instruments(3)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,907	2,850
Corporate debt securities/instruments(3) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	329	278
Corporate debt securities/instruments(3) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,088	2,097
Corporate debt securities/instruments(3) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Corporate debt securities/instruments(3) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	490	475
Core fixed income(4)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	102
Core fixed income(4) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	102
Core fixed income(4) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Core fixed income(4) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Core fixed income(4) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Global multi-sector fixed income(5)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	400	472
Global multi-sector fixed income(5) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	400	472
Global multi-sector fixed income(5) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Global multi-sector fixed income(5) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Global multi-sector fixed income(5) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Securitized and structured credit(6)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	534	571
Securitized and structured credit(6) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Securitized and structured credit(6) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Securitized and structured credit(6) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Securitized and structured credit(6) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	534	571
Cash and cash equivalents(7)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	486	655
Cash and cash equivalents(7) | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	39	42
Cash and cash equivalents(7) | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	1
Cash and cash equivalents(7) | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Cash and cash equivalents(7) | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	447	612
Absolute return funds
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,432	1,680
Absolute return funds | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Absolute return funds | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Absolute return funds | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Absolute return funds | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,432	1,680
Private equity funds
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,419	1,416
Private equity funds | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Private equity funds | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Private equity funds | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Private equity funds | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,419	1,416
Private real estate funds
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,264	1,203
Private real estate funds | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Private real estate funds | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Private real estate funds | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Private real estate funds | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,264	1,203
Insurance contracts
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	31	30
Insurance contracts | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Insurance contracts | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Insurance contracts | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	31	30
Insurance contracts | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Total investments
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	18,291	19,999
Total investments | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	7,206	8,031
Total investments | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,288	2,204
Total investments | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	31	30
Total investments | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	8,766	9,734
Net receivables and payables
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	197	76
Net receivables and payables | Level 1 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Net receivables and payables | Level 2 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Net receivables and payables | Level 3 [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Net receivables and payables | Not subject to leveling(8)
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 197	$ 76

Pension and Other Employee B_22

Pension and Other Employee Benefits (VEBA Trusts) (Details) - VEBA [Member]	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Fixed income securities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	42.00%	44.00%
U.S. equities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	36.00%	40.00%
International equities
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	10.00%	10.00%
Cash and cash equivalents
Defined Benefit Plans and PRB Plans [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	12.00%	6.00%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Dec. 31, 2017	Sep. 30, 2018	Jul. 01, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Deferred tax asset, Irish restructuring					$ 63
Valuation allowance, Irish restructuring	$ 17			$ 17	84	$ 17
Net tax benefit related to completion of 2017 tax return and additional amended R&D tax credit claims related to 2014-2016 tax year		$ 110
Discretionary pension contributions		$ 1,250			1,250	1,000	$ 500
Impact of Tax Cuts and Jobs Act of 2017 - tax benefit recorded related to deferred tax balance			$ 95
TRS tax-free gain							55
IRS Revenue Agent's Report Proposed Adjustment	41				32
Unrecognized Tax Benefits	$ 9			9	92	9	7	$ 7
Net State Income Tax Expense Allocated To Contracts					18	32	$ 26
Impact of Tax Cuts and Jobs Act of 2017 - tax expense (benefit) recorded				$ 171	(1)	171
Tax Cuts and Jobs Act of 2017, Remeasurement of Deferred for Reduction in Corporate Tax Rate, Income Tax Expense (Benefit)						$ 100
Estimated Applicable Foreign Tax Rate						15.50%
Impact of Tax Cuts and Jobs Act of 2017 - tax expense (benefit) recorded related to foreign earnings					(1)	$ 71
Raytheon United Kingdom [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards					95
Forcepoint | Federal
Income Taxes [Line Items]
Operating Loss Carryforwards					110
Forcepoint | State
Income Taxes [Line Items]
Operating Loss Carryforwards					292
Valuation allowance for Irish restructuring transaction [Member]
Income Taxes [Line Items]
Valuation allowance, Irish restructuring					$ 63

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	$ 245	$ 822	$ 713
Current Foreign Tax Expense (Benefit)	43	40	38
Current State and Local Tax Expense (Benefit)	0	0	(3)
Deferred Federal Income Tax Expense (Benefit)	(42)	235	118
Deferred Foreign Income Tax Expense (Benefit)	15	18	6
Deferred State and Local Income Tax Expense (Benefit)	3	(1)	1
Income Tax Expense (Benefit)	$ 264	$ 1,114	$ 873

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Statutory tax rate	21.00%	35.00%	35.00%
Foreign derived intangible income	(4.20%)	0.00%	0.00%
Research and development tax credit	(2.40%)	(1.50%)	(1.30%)
Equity compensation	(1.00%)	(1.20%)	(1.60%)
Foreign income tax rate differential	1.30%	0.20%	0.00%
Prior year true-up	(1.10%)	0.10%	0.00%
Tax benefit related to discretionary pension contributions	(3.00%)	0.00%	0.00%
R&D tax credit claims related to the 2014-2017 tax years	(2.10%)	0.00%	0.00%
Irish restructuring	(2.00%)	0.00%	0.00%
Change in valuation allowance	2.00%	0.00%	0.00%
Domestic manufacturing deduction benefit	0.00%	(2.50%)	(2.70%)
Remeasurement of deferred taxes	0.00%	3.20%	0.00%
One-time transition tax on previously undistributed foreign earnings	0.00%	2.30%	0.00%
TRS tax-free gain	0.00%	0.00%	(1.80%)
Other items, net	(0.10%)	0.20%	0.70%
Effective tax rate	8.40%	35.80%	28.30%

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Domestic income from continuing operations before taxes	$ 2,937	$ 3,027	$ 2,964
Foreign income from continuing operations before taxes	$ 210	$ 86	$ 121

Income Taxes (Schedule of Incom

Income Taxes (Schedule of Income Taxes Paid (Received), Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal
Income Taxes [Line Items]
Income Taxes Paid (Received), Net	$ (69)	$ 765	$ 710
Foreign
Income Taxes [Line Items]
Income Taxes Paid (Received), Net	63	77	47
State
Income Taxes [Line Items]
Income Taxes Paid (Received), Net	$ 23	$ 36	$ 22

Income Taxes (Schedule Of Unrec

Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, beginning of year	$ 9	$ 7	$ 7
Additions based on current year tax positions	20	1	2
Additions based on prior year tax positions	68	4	1
Reductions based on prior year tax positions	(5)	(1)	(3)
Settlements based on prior year tax positions	0	(2)	0
Unrecognized tax benefits, end of year	$ 92	$ 9	$ 7

Income Taxes (Schedule of Defer

Income Taxes (Schedule of Deferred Income Tax) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Components of Deferred Tax Assets and Liabilities [Abstract]
Accrued employee compensation and benefits	$ 209	$ 202
Other accrued expenses and reserves	77	86
Contract balances and inventories	(494)	(537)
Pension benefits	1,306	1,505
Other retiree benefits	67	67
Net operating loss and tax credit carryforwards	83	99
Depreciation and amortization	(827)	(858)
Partnership outside basis difference	(29)	(36)
Other	21	21
Valuation allowance	(84)	(17)
Deferred income taxes—noncurrent	$ 329	$ 532

Business Segment Reporting (Seg

Business Segment Reporting (Segment Operating Performance) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Sales, net	$ 7,360,000,000	$ 6,806,000,000	$ 6,625,000,000	$ 6,267,000,000	$ 6,783,000,000	$ 6,284,000,000	$ 6,281,000,000	$ 6,000,000,000	$ 27,058,000,000	$ 25,348,000,000	$ 24,124,000,000
Operating income									4,538,000,000	4,231,000,000	3,896,000,000
Integrated Defense Systems
Segment Reporting Information [Line Items]
Sales, net									6,115,000,000	5,740,000,000	5,460,000,000
Intelligence, Information and Services
Segment Reporting Information [Line Items]
Sales, net									6,056,000,000	5,511,000,000	5,512,000,000
Missile Systems
Segment Reporting Information [Line Items]
Sales, net									8,137,000,000	7,655,000,000	6,974,000,000
Space and Airborne Systems
Segment Reporting Information [Line Items]
Sales, net									6,152,000,000	5,890,000,000	5,689,000,000
Forcepoint
Segment Reporting Information [Line Items]
Sales, net									598,000,000	552,000,000	489,000,000
Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Sales, net									0	0	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, net									27,068,000,000	25,383,000,000	24,201,000,000
Operating income									3,253,000,000	3,147,000,000	3,115,000,000
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Sales, net									6,180,000,000	5,804,000,000	5,529,000,000
Operating income									1,023,000,000	935,000,000	971,000,000
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Sales, net									6,722,000,000	6,177,000,000	6,169,000,000
Operating income									538,000,000	455,000,000	467,000,000
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Sales, net									8,298,000,000	7,787,000,000	7,096,000,000
Operating income									973,000,000	1,010,000,000	921,000,000
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Sales, net									6,748,000,000	6,430,000,000	6,182,000,000
Operating income									884,000,000	862,000,000	808,000,000
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Sales, net									634,000,000	608,000,000	586,000,000
Operating income									5,000,000	33,000,000	90,000,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, net									(1,514,000,000)	(1,423,000,000)	(1,361,000,000)
Operating income									(170,000,000)	(148,000,000)	(142,000,000)
Intersegment Eliminations [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Sales, net									(65,000,000)	(64,000,000)	(69,000,000)
Operating income									(6,000,000)	(5,000,000)	(4,000,000)
Intersegment Eliminations [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Sales, net									(666,000,000)	(666,000,000)	(657,000,000)
Operating income									(68,000,000)	(64,000,000)	(65,000,000)
Intersegment Eliminations [Member] | Missile Systems
Segment Reporting Information [Line Items]
Sales, net									(161,000,000)	(132,000,000)	(122,000,000)
Operating income									(15,000,000)	(13,000,000)	(12,000,000)
Intersegment Eliminations [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Sales, net									(596,000,000)	(540,000,000)	(493,000,000)
Operating income									(60,000,000)	(51,000,000)	(46,000,000)
Intersegment Eliminations [Member] | Forcepoint
Segment Reporting Information [Line Items]
Sales, net									(26,000,000)	(21,000,000)	(20,000,000)
Operating income									(21,000,000)	(15,000,000)	(15,000,000)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, net									(1,524,000,000)	(1,458,000,000)	(1,438,000,000)
Segment Reconciling Items [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Sales, net									0	0	0
Segment Reconciling Items [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Sales, net									0	0	0
Segment Reconciling Items [Member] | Missile Systems
Segment Reporting Information [Line Items]
Sales, net									0	0	0
Segment Reconciling Items [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Sales, net									0	0	0
Segment Reconciling Items [Member] | Forcepoint
Segment Reporting Information [Line Items]
Sales, net									(10,000,000)	(35,000,000)	(77,000,000)
Segment Reconciling Items [Member] | Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Sales, net									(10,000,000)	(35,000,000)	(77,000,000)
Operating income									(126,000,000)	(160,000,000)	(198,000,000)
Segment Reconciling Items [Member] | FAS/CAS Operating Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income									1,428,000,000	1,303,000,000	1,036,000,000
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Sales, net									0	0	0
Operating income									$ (17,000,000)	$ (59,000,000)	$ (57,000,000)

Business Segment Reporting (Com

Business Segment Reporting (Components of FAS/CAS Operating Adjustment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Operating income	$ 4,538	$ 4,231	$ 3,896
FAS/CAS Pension Operating Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	1,415	1,291	1,026
FAS/CAS PRB Operating Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	13	12	10
FAS/CAS Operating Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	$ 1,428	$ 1,303	$ 1,036

Business Segment Reporting (Cap

Business Segment Reporting (Capital Expenditures) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Capital expenditures	$ 798	$ 634	$ 526
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Capital expenditures	242	200	135
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Capital expenditures	46	22	59
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Capital expenditures	337	221	135
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Capital expenditures	136	158	149
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Capital expenditures	13	14	19
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 24	$ 19	$ 29

Business Segment Reporting (Dep

Business Segment Reporting (Depreciation and Amortization) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Depreciation and Amortization	$ 568	$ 550	$ 515
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization	98	98	88
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Depreciation and Amortization	51	50	65
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization	98	84	69
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Depreciation and Amortization	140	132	122
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Depreciation and Amortization	17	17	15
Segment Reconciling Items [Member] | Acquisition Accounting Adjustment [Member]
Segment Reporting Information [Line Items]
Depreciation and Amortization	116	125	121
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and Amortization	$ 48	$ 44	$ 35

Business Segment Reporting (C_2

Business Segment Reporting (Components of Total Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 31,864	$ 30,860
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Total assets	4,829	4,679
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Total assets	4,242	4,230
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Total assets	8,229	7,338
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Total assets	6,750	6,696
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Total assets	2,531	2,543
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Total assets	$ 5,283	$ 5,374

Business Segment Reporting (Sch

Business Segment Reporting (Schedule of Property Plant and Equipment, Net, by Geographic Area) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 2,840	$ 2,439
United States
Segment Reporting Information [Line Items]
Property, plant and equipment, net	2,751	2,362
All Other (Principally Europe)
Segment Reporting Information [Line Items]
Property, plant and equipment, net	$ 89	$ 77

Business Segment Reporting (Dis

Business Segment Reporting (Disaggregation of Revenue) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Sales, net	$ 7,360,000,000	$ 6,806,000,000	$ 6,625,000,000	$ 6,267,000,000	$ 6,783,000,000	$ 6,284,000,000	$ 6,281,000,000	$ 6,000,000,000	$ 27,058,000,000	$ 25,348,000,000	$ 24,124,000,000
Corporate Segment [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(1,514,000,000)	(1,423,000,000)	(1,361,000,000)
Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(1,524,000,000)	(1,458,000,000)	(1,438,000,000)
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales, net									27,068,000,000	25,383,000,000	24,201,000,000
Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									15,118,000,000	14,866,000,000	14,204,000,000
Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									11,940,000,000	10,482,000,000	9,920,000,000
Sales to the U.S. government, excluding FMS sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									18,447,000,000	16,860,000,000	16,083,000,000
U.S. direct commercial sales and other U.S. sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									506,000,000	403,000,000	425,000,000
Foreign military sales through the U.S. government [Member]
Disaggregation of Revenue [Line Items]
Sales, net									3,502,000,000	3,311,000,000	2,899,000,000
Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Sales, net									4,603,000,000	4,774,000,000	4,717,000,000
United States
Disaggregation of Revenue [Line Items]
Sales, net									18,953,000,000	17,263,000,000	16,508,000,000
United States | Sales to the U.S. government, excluding FMS sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									7,377,000,000	7,160,000,000	6,990,000,000
United States | Sales to the U.S. government, excluding FMS sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									11,070,000,000	9,700,000,000	9,093,000,000
United States | U.S. direct commercial sales and other U.S. sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									484,000,000	390,000,000	395,000,000
United States | U.S. direct commercial sales and other U.S. sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									22,000,000	13,000,000	30,000,000
Asia/Pacific
Disaggregation of Revenue [Line Items]
Sales, net									2,723,000,000	2,721,000,000	2,453,000,000
Asia/Pacific | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,034,000,000	871,000,000	751,000,000
Asia/Pacific | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									207,000,000	262,000,000	272,000,000
Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,363,000,000	1,441,000,000	1,254,000,000
Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									119,000,000	147,000,000	176,000,000
Middle East and North Africa
Disaggregation of Revenue [Line Items]
Sales, net									3,986,000,000	4,063,000,000	3,871,000,000
Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,558,000,000	1,646,000,000	1,411,000,000
Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									267,000,000	207,000,000	182,000,000
Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,065,000,000	2,210,000,000	2,277,000,000
Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									96,000,000	0	1,000,000
All Other (Principally Europe)
Disaggregation of Revenue [Line Items]
Sales, net									1,396,000,000	1,301,000,000	1,292,000,000
All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									333,000,000	218,000,000	162,000,000
All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									103,000,000	107,000,000	121,000,000
All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									904,000,000	930,000,000	964,000,000
All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									56,000,000	46,000,000	45,000,000
Integrated Defense Systems
Disaggregation of Revenue [Line Items]
Sales, net									6,115,000,000	5,740,000,000	5,460,000,000
Integrated Defense Systems | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(65,000,000)	(64,000,000)	(69,000,000)
Integrated Defense Systems | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Integrated Defense Systems | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales, net									6,180,000,000	5,804,000,000	5,529,000,000
Integrated Defense Systems | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									4,005,000,000	3,761,000,000	3,499,000,000
Integrated Defense Systems | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,110,000,000	1,979,000,000	1,961,000,000
Integrated Defense Systems | Sales to the U.S. government, excluding FMS sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,524,000,000	2,319,000,000	2,239,000,000
Integrated Defense Systems | U.S. direct commercial sales and other U.S. sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									6,000,000	7,000,000	18,000,000
Integrated Defense Systems | Foreign military sales through the U.S. government [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,465,000,000	1,554,000,000	1,265,000,000
Integrated Defense Systems | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,120,000,000	1,860,000,000	1,938,000,000
Integrated Defense Systems | United States
Disaggregation of Revenue [Line Items]
Sales, net									2,530,000,000	2,326,000,000	2,257,000,000
Integrated Defense Systems | United States | Sales to the U.S. government, excluding FMS sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									818,000,000	812,000,000	766,000,000
Integrated Defense Systems | United States | Sales to the U.S. government, excluding FMS sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,706,000,000	1,507,000,000	1,473,000,000
Integrated Defense Systems | United States | U.S. direct commercial sales and other U.S. sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									5,000,000	6,000,000	13,000,000
Integrated Defense Systems | United States | U.S. direct commercial sales and other U.S. sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,000,000	1,000,000	5,000,000
Integrated Defense Systems | Asia/Pacific
Disaggregation of Revenue [Line Items]
Sales, net									1,096,000,000	1,046,000,000	932,000,000
Integrated Defense Systems | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									189,000,000	167,000,000	136,000,000
Integrated Defense Systems | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									79,000,000	138,000,000	119,000,000
Integrated Defense Systems | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									711,000,000	596,000,000	502,000,000
Integrated Defense Systems | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									117,000,000	145,000,000	175,000,000
Integrated Defense Systems | Middle East and North Africa
Disaggregation of Revenue [Line Items]
Sales, net									2,156,000,000	2,199,000,000	2,056,000,000
Integrated Defense Systems | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									849,000,000	1,066,000,000	816,000,000
Integrated Defense Systems | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									170,000,000	154,000,000	153,000,000
Integrated Defense Systems | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,137,000,000	979,000,000	1,086,000,000
Integrated Defense Systems | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	1,000,000
Integrated Defense Systems | All Other (Principally Europe)
Disaggregation of Revenue [Line Items]
Sales, net									333,000,000	169,000,000	215,000,000
Integrated Defense Systems | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									151,000,000	7,000,000	18,000,000
Integrated Defense Systems | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									27,000,000	22,000,000	23,000,000
Integrated Defense Systems | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									145,000,000	128,000,000	162,000,000
Integrated Defense Systems | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									10,000,000	12,000,000	12,000,000
Intelligence, Information and Services
Disaggregation of Revenue [Line Items]
Sales, net									6,056,000,000	5,511,000,000	5,512,000,000
Intelligence, Information and Services | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(666,000,000)	(666,000,000)	(657,000,000)
Intelligence, Information and Services | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Intelligence, Information and Services | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales, net									6,722,000,000	6,177,000,000	6,169,000,000
Intelligence, Information and Services | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,834,000,000	1,842,000,000	2,023,000,000
Intelligence, Information and Services | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									4,222,000,000	3,669,000,000	3,489,000,000
Intelligence, Information and Services | Sales to the U.S. government, excluding FMS sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									5,118,000,000	4,666,000,000	4,527,000,000
Intelligence, Information and Services | U.S. direct commercial sales and other U.S. sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									136,000,000	139,000,000	189,000,000
Intelligence, Information and Services | Foreign military sales through the U.S. government [Member]
Disaggregation of Revenue [Line Items]
Sales, net									315,000,000	256,000,000	322,000,000
Intelligence, Information and Services | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Sales, net									487,000,000	450,000,000	474,000,000
Intelligence, Information and Services | United States
Disaggregation of Revenue [Line Items]
Sales, net									5,254,000,000	4,805,000,000	4,716,000,000
Intelligence, Information and Services | United States | Sales to the U.S. government, excluding FMS sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,008,000,000	1,090,000,000	1,170,000,000
Intelligence, Information and Services | United States | Sales to the U.S. government, excluding FMS sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									4,110,000,000	3,576,000,000	3,357,000,000
Intelligence, Information and Services | United States | U.S. direct commercial sales and other U.S. sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									118,000,000	130,000,000	167,000,000
Intelligence, Information and Services | United States | U.S. direct commercial sales and other U.S. sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									18,000,000	9,000,000	22,000,000
Intelligence, Information and Services | Asia/Pacific
Disaggregation of Revenue [Line Items]
Sales, net									486,000,000	425,000,000	423,000,000
Intelligence, Information and Services | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									243,000,000	181,000,000	180,000,000
Intelligence, Information and Services | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									45,000,000	51,000,000	77,000,000
Intelligence, Information and Services | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									198,000,000	193,000,000	166,000,000
Intelligence, Information and Services | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Intelligence, Information and Services | Middle East and North Africa
Disaggregation of Revenue [Line Items]
Sales, net									40,000,000	37,000,000	135,000,000
Intelligence, Information and Services | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									20,000,000	18,000,000	60,000,000
Intelligence, Information and Services | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									5,000,000	1,000,000	3,000,000
Intelligence, Information and Services | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									15,000,000	18,000,000	72,000,000
Intelligence, Information and Services | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Intelligence, Information and Services | All Other (Principally Europe)
Disaggregation of Revenue [Line Items]
Sales, net									276,000,000	244,000,000	238,000,000
Intelligence, Information and Services | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,000,000	3,000,000	2,000,000
Intelligence, Information and Services | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	2,000,000	0
Intelligence, Information and Services | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									230,000,000	209,000,000	206,000,000
Intelligence, Information and Services | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									44,000,000	30,000,000	30,000,000
Missile Systems
Disaggregation of Revenue [Line Items]
Sales, net									8,137,000,000	7,655,000,000	6,974,000,000
Missile Systems | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(161,000,000)	(132,000,000)	(122,000,000)
Missile Systems | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Missile Systems | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales, net									8,298,000,000	7,787,000,000	7,096,000,000
Missile Systems | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									5,209,000,000	5,495,000,000	4,883,000,000
Missile Systems | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,928,000,000	2,160,000,000	2,091,000,000
Missile Systems | Sales to the U.S. government, excluding FMS sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									5,628,000,000	4,905,000,000	4,549,000,000
Missile Systems | U.S. direct commercial sales and other U.S. sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									41,000,000	1,000,000	2,000,000
Missile Systems | Foreign military sales through the U.S. government [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,180,000,000	1,102,000,000	1,008,000,000
Missile Systems | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,288,000,000	1,647,000,000	1,415,000,000
Missile Systems | United States
Disaggregation of Revenue [Line Items]
Sales, net									5,669,000,000	4,906,000,000	4,551,000,000
Missile Systems | United States | Sales to the U.S. government, excluding FMS sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,953,000,000	2,914,000,000	2,647,000,000
Missile Systems | United States | Sales to the U.S. government, excluding FMS sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,675,000,000	1,991,000,000	1,902,000,000
Missile Systems | United States | U.S. direct commercial sales and other U.S. sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									41,000,000	1,000,000	2,000,000
Missile Systems | United States | U.S. direct commercial sales and other U.S. sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Missile Systems | Asia/Pacific
Disaggregation of Revenue [Line Items]
Sales, net									685,000,000	784,000,000	648,000,000
Missile Systems | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									450,000,000	410,000,000	328,000,000
Missile Systems | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									61,000,000	64,000,000	70,000,000
Missile Systems | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									173,000,000	309,000,000	249,000,000
Missile Systems | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,000,000	1,000,000	1,000,000
Missile Systems | Middle East and North Africa
Disaggregation of Revenue [Line Items]
Sales, net									1,356,000,000	1,406,000,000	1,241,000,000
Missile Systems | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									452,000,000	371,000,000	387,000,000
Missile Systems | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									23,000,000	22,000,000	25,000,000
Missile Systems | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									785,000,000	1,013,000,000	829,000,000
Missile Systems | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									96,000,000	0	0
Missile Systems | All Other (Principally Europe)
Disaggregation of Revenue [Line Items]
Sales, net									427,000,000	559,000,000	534,000,000
Missile Systems | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									124,000,000	157,000,000	108,000,000
Missile Systems | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									70,000,000	78,000,000	90,000,000
Missile Systems | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									231,000,000	320,000,000	333,000,000
Missile Systems | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,000,000	4,000,000	3,000,000
Space and Airborne Systems
Disaggregation of Revenue [Line Items]
Sales, net									6,152,000,000	5,890,000,000	5,689,000,000
Space and Airborne Systems | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(596,000,000)	(540,000,000)	(493,000,000)
Space and Airborne Systems | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Space and Airborne Systems | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales, net									6,748,000,000	6,430,000,000	6,182,000,000
Space and Airborne Systems | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									3,486,000,000	3,229,000,000	3,326,000,000
Space and Airborne Systems | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,666,000,000	2,661,000,000	2,363,000,000
Space and Airborne Systems | Sales to the U.S. government, excluding FMS sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									5,045,000,000	4,847,000,000	4,666,000,000
Space and Airborne Systems | U.S. direct commercial sales and other U.S. sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									114,000,000	53,000,000	23,000,000
Space and Airborne Systems | Foreign military sales through the U.S. government [Member]
Disaggregation of Revenue [Line Items]
Sales, net									542,000,000	399,000,000	304,000,000
Space and Airborne Systems | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Sales, net									451,000,000	591,000,000	696,000,000
Space and Airborne Systems | United States
Disaggregation of Revenue [Line Items]
Sales, net									5,159,000,000	4,900,000,000	4,689,000,000
Space and Airborne Systems | United States | Sales to the U.S. government, excluding FMS sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,480,000,000	2,233,000,000	2,321,000,000
Space and Airborne Systems | United States | Sales to the U.S. government, excluding FMS sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									2,565,000,000	2,614,000,000	2,345,000,000
Space and Airborne Systems | United States | U.S. direct commercial sales and other U.S. sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									111,000,000	51,000,000	20,000,000
Space and Airborne Systems | United States | U.S. direct commercial sales and other U.S. sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									3,000,000	2,000,000	3,000,000
Space and Airborne Systems | Asia/Pacific
Disaggregation of Revenue [Line Items]
Sales, net									386,000,000	407,000,000	401,000,000
Space and Airborne Systems | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									152,000,000	113,000,000	107,000,000
Space and Airborne Systems | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									22,000,000	9,000,000	6,000,000
Space and Airborne Systems | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									211,000,000	284,000,000	288,000,000
Space and Airborne Systems | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									1,000,000	1,000,000	0
Space and Airborne Systems | Middle East and North Africa
Disaggregation of Revenue [Line Items]
Sales, net									401,000,000	396,000,000	421,000,000
Space and Airborne Systems | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									237,000,000	191,000,000	148,000,000
Space and Airborne Systems | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									69,000,000	30,000,000	1,000,000
Space and Airborne Systems | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									95,000,000	175,000,000	272,000,000
Space and Airborne Systems | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Space and Airborne Systems | All Other (Principally Europe)
Disaggregation of Revenue [Line Items]
Sales, net									206,000,000	187,000,000	178,000,000
Space and Airborne Systems | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									56,000,000	51,000,000	34,000,000
Space and Airborne Systems | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									6,000,000	5,000,000	8,000,000
Space and Airborne Systems | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									144,000,000	131,000,000	136,000,000
Space and Airborne Systems | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint
Disaggregation of Revenue [Line Items]
Sales, net									598,000,000	552,000,000	489,000,000
Forcepoint | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(26,000,000)	(21,000,000)	(20,000,000)
Forcepoint | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Sales, net									(10,000,000)	(35,000,000)	(77,000,000)
Forcepoint | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales, net									634,000,000	608,000,000	586,000,000
Forcepoint | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									584,000,000	539,000,000	473,000,000
Forcepoint | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									14,000,000	13,000,000	16,000,000
Forcepoint | Sales to the U.S. government, excluding FMS sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									132,000,000	123,000,000	102,000,000
Forcepoint | U.S. direct commercial sales and other U.S. sales [Member]
Disaggregation of Revenue [Line Items]
Sales, net									209,000,000	203,000,000	193,000,000
Forcepoint | Foreign military sales through the U.S. government [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Sales, net									257,000,000	226,000,000	194,000,000
Forcepoint | United States
Disaggregation of Revenue [Line Items]
Sales, net									341,000,000	326,000,000	295,000,000
Forcepoint | United States | Sales to the U.S. government, excluding FMS sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									118,000,000	111,000,000	86,000,000
Forcepoint | United States | Sales to the U.S. government, excluding FMS sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									14,000,000	12,000,000	16,000,000
Forcepoint | United States | U.S. direct commercial sales and other U.S. sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									209,000,000	202,000,000	193,000,000
Forcepoint | United States | U.S. direct commercial sales and other U.S. sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	1,000,000	0
Forcepoint | Asia/Pacific
Disaggregation of Revenue [Line Items]
Sales, net									70,000,000	59,000,000	49,000,000
Forcepoint | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									70,000,000	59,000,000	49,000,000
Forcepoint | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | Middle East and North Africa
Disaggregation of Revenue [Line Items]
Sales, net									33,000,000	25,000,000	18,000,000
Forcepoint | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									33,000,000	25,000,000	18,000,000
Forcepoint | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | All Other (Principally Europe)
Disaggregation of Revenue [Line Items]
Sales, net									154,000,000	142,000,000	127,000,000
Forcepoint | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Forcepoint | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									154,000,000	142,000,000	127,000,000
Forcepoint | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | United States | Sales to the U.S. government, excluding FMS sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | United States | Sales to the U.S. government, excluding FMS sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | United States | U.S. direct commercial sales and other U.S. sales [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | United States | U.S. direct commercial sales and other U.S. sales [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Asia/Pacific | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Asia/Pacific | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Middle East and North Africa | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | Middle East and North Africa | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | All Other (Principally Europe) | Foreign military sales through the U.S. government [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Corporate Segment [Member] | All Other (Principally Europe) | Foreign direct commercial sales and other foreign sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type Contract [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Operating Segments [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Acquisition Accounting Adjustment [Member]
Disaggregation of Revenue [Line Items]
Sales, net									0	0	0
Acquisition Accounting Adjustment [Member] | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Sales, net									$ (10,000,000)	$ (35,000,000)	$ (77,000,000)

Quarterly Operating Results (_3

Quarterly Operating Results (Unaudited) (Schedule of Quarterly Operating Results) (Details) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018USD ($)workdays$ / shares	Sep. 30, 2018USD ($)workdays$ / shares	Jul. 01, 2018USD ($)workdays$ / shares	Apr. 01, 2018USD ($)workdays$ / shares	Dec. 31, 2017USD ($)workdays$ / shares	Oct. 01, 2017USD ($)workdays$ / shares	Jul. 02, 2017USD ($)workdays$ / shares	Apr. 02, 2017USD ($)workdays$ / shares	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)$ / shares	Dec. 31, 2016USD ($)$ / shares
Quarterly Financial Information [Line Items]
Net sales	$ 7,360	$ 6,806	$ 6,625	$ 6,267	$ 6,783	$ 6,284	$ 6,281	$ 6,000	$ 27,058	$ 25,348	$ 24,124
Gross margin	1,967	1,935	1,848	1,735	1,798	1,816	1,760	1,634
Income from continuing operations	828	641	790	624	387	568	547	497	2,910	2,022	2,243
Net income attributable to Raytheon Company	$ 832	$ 644	$ 800	$ 633	$ 393	$ 572	$ 553	$ 506	$ 2,909	$ 2,024	$ 2,244
Basic EPS from continuing operations attributable to Raytheon Company common stockholders | $ / shares	$ 2.93	$ 2.25	$ 2.78	$ 2.20	$ 1.35	$ 1.97	$ 1.90	$ 1.73	$ 10.16	$ 6.95	$ 7.55
Diluted EPS from continuing operations attributable to Raytheon Company common stockholders | $ / shares	2.93	2.25	2.78	2.20	1.35	1.97	1.89	1.73	10.15	6.94	7.55
Basic EPS attributable to Raytheon Company common stockholders | $ / shares	2.93	2.25	2.78	2.20	1.35	1.97	1.90	1.74	10.16	6.96	7.56
Diluted EPS attributable to Raytheon Company common stockholders | $ / shares	$ 2.93	$ 2.25	$ 2.78	$ 2.19	$ 1.35	$ 1.97	$ 1.89	$ 1.74	$ 10.15	$ 6.95	$ 7.55
Workdays | workdays	58	63	64	64	58	62	64	64
Net Periodic Benefit Cost (Credit), Loss Due to Settlement		$ 288
Impact of Tax Cuts and Jobs Act of 2017 - tax expense (benefit) recorded					$ 171				$ (1)	$ 171