Raytheon 10-Q 25 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 22, 2018
Entity Information [Line Items]
Entity Registrant Name	RAYTHEON CO/
Entity Central Index Key	1,047,122
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	RTN
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		284,577,000
Entity Current Reporting Status	Yes

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 2,073,000,000	$ 3,103,000,000
Short-term investments	0	297,000,000
Receivables, net	1,527,000,000	1,324,000,000
Contract assets	5,715,000,000	5,247,000,000
Inventories	804,000,000	594,000,000
Prepaid expenses and other current assets	516,000,000	761,000,000
Total current assets	10,635,000,000	11,326,000,000
Property, plant and equipment, net	2,639,000,000	2,439,000,000
Goodwill	14,865,000,000	14,871,000,000
Other assets, net	1,995,000,000	2,224,000,000
Total assets	30,134,000,000	30,860,000,000
Current liabilities
Commercial paper	300,000,000	300,000,000
Contract liabilities	2,931,000,000	2,927,000,000
Accounts payable	1,392,000,000	1,519,000,000
Accrued employee compensation	1,252,000,000	1,342,000,000
Other current liabilities	1,281,000,000	1,260,000,000
Total current liabilities	7,156,000,000	7,348,000,000
Accrued retiree benefits and other long-term liabilities	6,355,000,000	8,287,000,000
Long-term debt	4,753,000,000	4,750,000,000
Commitments and contingencies (Note 10)
Redeemable noncontrolling interest (Note 11)	560,000,000	512,000,000
Raytheon Company stockholders’ equity
Common stock, par value, $0.01 per share, 1,450 shares authorized, 285 and 288 shares outstanding at September 30, 2018 and December 31, 2017, respectively	3,000,000	3,000,000
Additional paid-in capital	0	0
Accumulated other comprehensive loss	(8,413,000,000)	(7,935,000,000)
Retained earnings	19,720,000,000	17,895,000,000
Total Raytheon Company stockholders’ equity	11,310,000,000	9,963,000,000
Noncontrolling interests in subsidiaries	0	0
Total equity	11,310,000,000	9,963,000,000
Total liabilities, redeemable noncontrolling interest and equity	$ 30,134,000,000	$ 30,860,000,000

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares shares in Millions	Sep. 30, 2018	Dec. 31, 2017
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,450	1,450
Common stock, shares outstanding	284.5	288.4

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Net sales
Net sales	$ 6,806	$ 6,284	$ 19,698	$ 18,565
Operating expenses
General and administrative expenses	752	688	2,194	2,079
Total operating expenses	5,623	5,156	16,374	15,434
Operating income	1,183	1,128	3,324	3,131
Non-operating (income) expense, net
Retirement benefits non-service expense	516	270	993	683
Interest expense	45	48	138	157
Interest income	(6)	(4)	(21)	(14)
Other (income) expense, net	(8)	(2)	(6)	26
Total non-operating (income) expense, net	547	312	1,104	852
Income from continuing operations before taxes	636	816	2,220	2,279
Federal and foreign income taxes	(5)	248	165	667
Income from continuing operations	641	568	2,055	1,612
Income (loss) from discontinued operations, net of tax	0	(1)	0	2
Net income	641	567	2,055	1,614
Less: Net income (loss) attributable to noncontrolling interests in subsidiaries	(3)	(5)	(22)	(17)
Net income attributable to Raytheon Company	$ 644	$ 572	$ 2,077	$ 1,631
Basic earnings per share attributable to Raytheon Company common stockholders:
Income from continuing operations	$ 2.25	$ 1.97	$ 7.24	$ 5.59
Income (loss) from discontinued operations, net of tax	0	0	0	0.01
Net income	2.25	1.97	7.23	5.60
Diluted earnings per share attributable to Raytheon Company common stockholders:
Income from continuing operations	2.25	1.97	7.23	5.59
Income (loss) from discontinued operations, net of tax	0	0	0	0.01
Net income	$ 2.25	$ 1.97	$ 7.23	$ 5.60
Amounts attributable to Raytheon Company common stockholders:
Income from continuing operations	$ 644	$ 573	$ 2,077	$ 1,629
Income (loss) from discontinued operations, net of tax	0	(1)	0	2
Net income attributable to Raytheon Company	$ 644	$ 572	$ 2,077	$ 1,631
Dividends declared per share	$ 0.8675	$ 0.7975	$ 2.6025	$ 2.3925
Products [Member]
Net sales
Net sales	$ 5,656	$ 5,305	$ 16,417	$ 15,656
Operating expenses
Cost of sales	3,970	3,683	11,610	11,066
Services [Member]
Net sales
Net sales	1,150	979	3,281	2,909
Operating expenses
Cost of sales	$ 901	$ 785	$ 2,570	$ 2,289

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Net income	$ 641,000,000	$ 567,000,000	$ 2,055,000,000	$ 1,614,000,000
Pension and other postretirement benefit plans, net:
Actuarial loss arising during period	(47,000,000)	(497,000,000)	(47,000,000)	(497,000,000)
Amortization of prior service cost included in net income	1,000,000	1,000,000	4,000,000	3,000,000
Amortization of net actuarial loss included in net income	328,000,000	327,000,000	1,021,000,000	890,000,000
Loss due to settlements	288,000,000	0	288,000,000	0
Pension and other postretirement benefit plans, net	570,000,000	(169,000,000)	1,266,000,000	396,000,000
Foreign exchange translation	0	27,000,000	(19,000,000)	71,000,000
Cash flow hedges	0	3,000,000	(10,000,000)	11,000,000
Unrealized gains (losses) on investments and other, net	0	0	0	0
Other comprehensive income (loss), before tax	570,000,000	(139,000,000)	1,237,000,000	478,000,000
Income tax benefit (expense) related to items of other comprehensive income (loss)	(120,000,000)	58,000,000	(264,000,000)	(142,000,000)
Other comprehensive income (loss), net of tax	450,000,000	(81,000,000)	973,000,000	336,000,000
Reclassification of stranded tax effects	0	0	(1,451,000,000)	0
Total comprehensive income (loss)	1,091,000,000	486,000,000	1,577,000,000	1,950,000,000
Less: Comprehensive income (loss) attributable to noncontrolling interests in subsidiaries	(3,000,000)	(5,000,000)	(22,000,000)	(17,000,000)
Comprehensive income attributable to Raytheon Company	$ 1,094,000,000	$ 491,000,000	$ 1,599,000,000	$ 1,967,000,000

Consolidated Statements of Equi

Consolidated Statements of Equity (Unaudited) - 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, 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	1,631,000,000				1,631,000,000	1,631,000,000
Net Income (loss) excluding redeemable noncontrolling interest	1,631,000,000						0
Other comprehensive income (loss), net of tax	336,000,000			336,000,000		336,000,000
Adjustment of redeemable noncontrolling interest to redemption value	90,000,000				90,000,000	90,000,000
Dividends declared	(695,000,000)		2,000,000		(697,000,000)	(695,000,000)
Common stock plans activity	122,000,000		122,000,000			122,000,000
Share repurchases	(784,000,000)		(124,000,000)		(660,000,000)	(784,000,000)
Ending Balance at Oct. 01, 2017	10,857,000,000	3,000,000	0	(7,075,000,000)	17,929,000,000	10,857,000,000	0
Beginning 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	2,077,000,000				2,077,000,000	2,077,000,000
Net Income (loss) excluding redeemable noncontrolling interest	2,077,000,000						0
Other comprehensive income (loss), net of tax	973,000,000			973,000,000		973,000,000
Reclassification of stranded tax effects	0			(1,451,000,000)	1,451,000,000	0
Adjustment of redeemable noncontrolling interest to redemption value	(70,000,000)				(70,000,000)	(70,000,000)
Dividends declared	(745,000,000)		2,000,000		(747,000,000)	(745,000,000)
Common stock plans activity	128,000,000		128,000,000			128,000,000
Share repurchases	(1,016,000,000)		(130,000,000)		(886,000,000)	(1,016,000,000)
Ending Balance at Sep. 30, 2018	$ 11,310,000,000	$ 3,000,000	$ 0	$ (8,413,000,000)	$ 19,720,000,000	$ 11,310,000,000	$ 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 (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017
Cash flows from operating activities
Net income	$ 2,055,000,000	$ 1,614,000,000
(Income) loss from discontinued operations, net of tax	0	(2,000,000)
Income from continuing operations	2,055,000,000	1,612,000,000
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	417,000,000	401,000,000
Stock-based compensation	137,000,000	127,000,000
Loss on repayment of long-term debt	0	39,000,000
Deferred income taxes	(16,000,000)	(137,000,000)
Changes in assets and liabilities
Receivables, net	(205,000,000)	(226,000,000)
Contract assets and contract liabilities	(468,000,000)	(962,000,000)
Inventories	(212,000,000)	(83,000,000)
Prepaid expenses and other current assets	72,000,000	148,000,000
Income taxes receivable/payable	194,000,000	66,000,000
Accounts payable	(64,000,000)	(191,000,000)
Accrued employee compensation	(91,000,000)	(68,000,000)
Other current liabilities	(44,000,000)	35,000,000
Accrued retiree benefits	(748,000,000)	452,000,000
Other, net	(32,000,000)	(90,000,000)
Net cash provided by (used in) operating activities from continuing operations	995,000,000	1,123,000,000
Net cash provided by (used in) operating activities from discontinued operations	1,000,000	(1,000,000)
Net cash provided by (used in) operating activities	996,000,000	1,122,000,000
Cash flows from investing activities
Additions to property, plant and equipment	(546,000,000)	(323,000,000)
Proceeds from sales of property, plant and equipment	0	31,000,000
Additions to capitalized internal use software	(42,000,000)	(49,000,000)
Purchases of short-term investments	0	(399,000,000)
Maturities of short-term investments	309,000,000	517,000,000
Payments for purchases of acquired companies, net of cash received	0	(93,000,000)
Proceeds from sale of business, net of transaction costs	11,000,000	0
Other	(9,000,000)	(2,000,000)
Net cash provided by (used in) investing activities	(277,000,000)	(318,000,000)
Cash flows from financing activities
Dividends paid	(728,000,000)	(679,000,000)
Net borrowings (payments) on commercial paper	0	300,000,000
Repayments of long-term debt	0	(591,000,000)
Loss on repayment of long-term debt	0	(38,000,000)
Contribution from noncontrolling interest in Forcepoint	0	8,000,000
Other	(5,000,000)	0
Net cash provided by (used in) financing activities	(1,749,000,000)	(1,784,000,000)
Net increase (decrease) in cash, cash equivalents and restricted cash	(1,030,000,000)	(980,000,000)
Cash, cash equivalents and restricted cash at beginning of the year	3,115,000,000	3,303,000,000
Cash, cash equivalents and restricted cash at end of period	2,085,000,000	2,323,000,000
Share Repurchase Program [Member]
Cash flows from financing activities
Repurchases of common stock	(925,000,000)	(700,000,000)
Satisfy tax withholding [Member]
Cash flows from financing activities
Repurchases of common stock	$ (91,000,000)	$ (84,000,000)

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation We prepared the accompanying unaudited consolidated financial statements of Raytheon Company and all wholly-owned, majority-owned or otherwise controlled subsidiaries on the same basis as our annual audited financial statements. We condensed or omitted certain information and footnote disclosures normally included in our annual audited financial statements, which we prepared in accordance with U.S. Generally Accepted Accounting Principles (GAAP). Our quarterly financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2017 . As used in this report, the terms “we,” “us,” “our,” “Raytheon” and the “Company” mean Raytheon Company and its subsidiaries, unless the context indicates another meaning. In the opinion of management, our financial statements reflect all adjustments, which are of a normal recurring nature, necessary for presentation of financial statements for interim periods in accordance with U.S. GAAP and with the instructions to Form 10-Q in Article 10 of Securities and Exchange Commission (SEC) Regulation S-X. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions about future events that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of our financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates, and any such differences may be material to our financial statements. In addition, we reclassified certain amounts to conform to our current period presentation. See “Note 2: Accounting Standards” for additional information on reclassifications.

Accounting Standards

Accounting Standards	9 Months Ended
	Sep. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Standards	Accounting Standards In February 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (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 Tax Cuts and Jobs Act of 2017 (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 accumulated other comprehensive loss (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 other postretirement benefit (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 are currently evaluating the potential changes from this ASU to our future financial reporting and disclosures and designing and implementing related processes and controls. We expect the standard to have an impact of approximately $1 billion on our assets and liabilities for the addition of right-of-use assets and lease liabilities, but we do not expect it to have a material impact on our results of operations or liquidity. Other new pronouncements issued but not effective until after September 30, 2018 are not expected to have a material impact on our financial position, results of operations or liquidity.

Changes in Estimates under Perc

Changes in Estimates under Percentage of Completion Contract Accounting	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Changes in Estimates under Percentage of Completion Contract Accounting	Changes in Estimates under Percentage of Completion Contract Accounting 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 recorded. Net EAC adjustments had the following impact on our operating results: Three Months Ended Nine Months Ended (In millions, except per share amounts) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Operating income $ 124 $ 149 $ 368 $ 315 Income from continuing operations attributable to Raytheon Company 98 97 291 205 Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company $ 0.34 $ 0.33 $ 1.01 $ 0.70 In addition, net revenue recognized from our performance obligations satisfied in previous periods was $175 million and $184 million in the third quarters of 2018 and 2017 , respectively, and $475 million and $398 million in the first nine months of 2018 and 2017 , respectively. This primarily relates to EAC adjustments that impacted revenue.

Earnings per Share (EPS)

Earnings per Share (EPS)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings per Share (EPS)	Earnings Per Share (EPS) 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 unaudited 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 unaudited 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. As a result, both basic and diluted EPS were increased by $0.01 in the first nine months of 2017 . There was no impact to basic or diluted shares in the third quarter or first nine months of 2018 or third quarter of 2017 related to the redemption value adjustments. EPS from continuing operations attributable to Raytheon Company common stockholders and unvested stock-based payment awards was as follows: Three Months Ended Nine Months Ended Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Basic EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 0.87 $ 0.79 $ 2.60 $ 2.39 Undistributed earnings 1.38 1.18 4.64 3.20 Total $ 2.25 $ 1.97 $ 7.24 $ 5.59 Diluted EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 0.87 $ 0.80 $ 2.60 $ 2.39 Undistributed earnings 1.38 1.17 4.63 3.20 Total $ 2.25 $ 1.97 $ 7.23 $ 5.59 Income attributable to participating securities was as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Income from continuing operations attributable to participating securities $ 6 $ 6 $ 21 $ 20 Income (loss) from discontinued operations, net of tax attributable to participating securities — — — — Net income attributable to participating securities $ 6 $ 6 $ 21 $ 20 The weighted-average shares outstanding for basic and diluted EPS were as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Shares for basic EPS (1) 285.7 290.7 287.2 291.6 Effect of dilutive securities 0.3 0.3 0.3 0.3 Shares for diluted EPS 286.0 291.0 287.5 291.9 (1) Includes 2.8 million and 3.2 million participating securities in the third quarters of 2018 and 2017 , respectively, and 3.0 million and 3.5 million participating securities in the first nine months of 2018 and 2017

Inventories

Inventories	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following : (In millions) Sep 30, 2018 Dec 31, 2017 Materials and purchased parts $ 77 $ 69 Work in process 707 504 Finished goods 20 21 Total $ 804 $ 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 $157 million and $101 million in inventories as work in process at September 30, 2018 and December 31, 2017

Contract Assets and Contract Li

Contract Assets and Contract Liabilities	9 Months Ended
	Sep. 30, 2018
Contract with Customer, Asset and Liability [Abstract]
Contract Assets and Contract Liabilities	Contract Assets and Contract Liabilities Our contract assets consist of 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. Our contract liabilities consist of advance payments and billings in excess of costs incurred and deferred revenue. The noncurrent portion of deferred revenue is included in accrued retiree benefits and other long-term liabilities in our consolidated balance sheets. Net contract assets (liabilities) consisted of the following : (In millions, except percentages) Sep 30, 2018 Dec 31, 2017 $ Change % Change Contract assets $ 5,715 $ 5,247 $ 468 9 % Contract liabilities—current (2,931 ) (2,927 ) (4 ) — % Contract liabilities—noncurrent (134 ) (127 ) (7 ) (6 )% Net contract assets (liabilities) $ 2,650 $ 2,193 $ 457 21 % The $457 million increase in our net contract assets (liabilities) from December 31, 2017 to September 30, 2018 was primarily due to a $468 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 September 30, 2018 , we had approximately $2.3 billion of total contract value, recognized approximately $800 million of sales for work performed to date and received approximately $800 million in advances on contracts for precision guided munitions to certain Middle Eastern customers for which U.S. government approval is pending. In the third quarter and first nine months of 2018 , we recognized revenue of $250 million and $1,213 million , respectively, related to our contract liabilities at January 1, 2018 . In the third quarter and first nine months of 2017 , we recognized revenue of $247 million and $1,199 million , respectively, related to our contract liabilities at January 1, 2017 . Impairment losses recognized on our receivables and contract assets were de minimis in the third quarters and first nine months of 2018 and 2017

Deferred Commissions

Deferred Commissions	9 Months Ended
	Sep. 30, 2018
Deferred Costs [Abstract]
Deferred Commissions	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 September 30, 2018 and December 31, 2017 , we had deferred commissions of $46 million and $37 million , respectively. Amortization expense related to deferred commissions was $14 million and $7 million in the third quarters of 2018 and 2017 , respectively, and $29 million and $17 million in the first nine months of 2018 and 2017

Acquisitions, Divestitures and

Acquisitions, Divestitures and Goodwill	9 Months Ended
	Sep. 30, 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. We did no t make any acquisitions in the first nine months of 2018 . 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. 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, 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 ) (1 ) — — — (3 ) Balance at September 30, 2018 $ 1,704 $ 2,966 $ 4,154 $ 4,103 $ 1,938 $ 14,865 (1) At September 30, 2018 , Forcepoint’s fair value was estimated to exceed its net book value by approximately $1.7 billion

Derivative and Other Financial

Derivative and Other Financial Instruments	9 Months Ended
	Sep. 30, 2018
Summary of Derivative Instruments [Abstract]
Derivative and Other Financial Instruments	Derivatives and Other Financial Instruments Derivatives —Our primary market exposures are to foreign exchange rates and interest rates, and we use certain derivative financial instruments to help manage these exposures. 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 use foreign currency forward contracts to fix the functional currency value of specific commitments, payments and receipts denominated in foreign currencies. The aggregate notional amount of our outstanding foreign currency forward contracts was $1,936 million and $1,354 million at September 30, 2018 and December 31, 2017 , respectively. The net notional exposure of these contracts was $1,007 million and $525 million at September 30, 2018 and December 31, 2017 , respectively. 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 $19 million and $18 million , respectively, at September 30, 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. At September 30, 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. There were no interest rate swaps outstanding at September 30, 2018 or December 31, 2017 . Other Financial Instruments — 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, settlement date and current rates. At September 30, 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 the third quarter and first nine months of 2017 , we recorded unrealized losses on short-term investments of less than $1 million , net of tax, in AOCL. We did not have any sales of short-term investments in the third quarters or first nine months of 2018 or 2017 . We did not have any transfers of assets or liabilities between levels of the fair value hierarchy during the first nine months of 2018 . In addition to the financial instruments discussed above, we hold other financial instruments, including cash and cash equivalents, notes receivable, commercial paper and long-term debt. The carrying amounts for cash and cash equivalents, notes receivable and commercial paper approximated their fair values. The carrying value of long-term debt was recorded at amortized cost. The estimated fair value of long-term debt was determined based on quoted prices in inactive markets, which falls within Level 2 of the fair value hierarchy. The carrying value and estimated fair value of long-term debt were as follows: (In millions) Sep 30, 2018 Dec 31, 2017 Carrying value of long-term debt $ 4,753 $ 4,750 Fair value of long-term debt 5,035 5,293 At September 30, 2018 , short-term commercial paper borrowings outstanding were $300 million , which had a weighted-average interest rate and original maturity period of 2.301% and 8 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. 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 . Supplemental Cash Flow Information— The following table provides a reconciliation of cash and cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of such amounts in the consolidated statements of cash flows: (In millions) Sep 30, 2018 Dec 31, 2017 Cash and cash equivalents $ 2,073 $ 3,103 Restricted cash 12 12 Cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 2,085 $ 3,115

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies 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: (In millions, except percentages) Sep 30, 2018 Dec 31, 2017 Total remediation costs—undiscounted $ 203 $ 206 Weighted-average discount rate 5.2 % 5.2 % Total remediation costs—discounted $ 136 $ 142 Recoverable portion 88 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. 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 2026. Additional guarantees of project performance for which there is no stated value also remain outstanding. The stated values outstanding consisted of the following : (In millions) Sep 30, 2018 Dec 31, 2017 Guarantees $ 208 $ 216 Letters of credit 2,652 2,416 Surety bonds 166 166 All guarantees at September 30, 2018 and December 31, 2017 related to our joint venture in Thales-Raytheon Systems Air and Missile Defense Command and Control S.A.S. (TRS AMDC2). Included in letters of credit above were $54 million and $47 million at September 30, 2018 and December 31, 2017 , respectively, related to our joint venture in TRS AMDC2. We provide these guarantees and 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 September 30, 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 September 30, 2018 . We had an estimated liability of $1 million and $2 million at September 30, 2018 and December 31, 2017 , 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 in-country industrial participation (ICIP) agreements, as a condition to obtaining orders for our products and services from certain customers in foreign countries. At September 30, 2018 , the aggregate amount of our offset agreements, both agreed to and anticipated to be agreed to, had an outstanding notional value of approximately $9.4 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	9 Months Ended
	Sep. 30, 2018
Forcepoint Joint Venture [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 September 30, 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 $560 million at September 30, 2018 , or the carrying value, defined as the initial value adjusted for Vista Equity Partners’ share of the cumulative impact of net income (loss), other changes in accumulated other comprehensive income (loss) and additional contributions, which was $287 million at September 30, 2018 . Adjustments to the redemption value over the period from the date of acquisition to the redemption date are immediately recorded to retained earnings. A rollforward of redeemable noncontrolling interest was as follows: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Beginning balance $ 512 $ 449 Net income (loss) (22 ) (17 ) Other comprehensive income (loss), net of tax (1) — — Contribution from noncontrolling interest — 8 Adjustment of noncontrolling interest to redemption value 70 (51 ) Ending balance $ 560 $ 389 (1) Other comprehensive income (loss), net of tax, was a loss of less than $1 million for the first nine months of 2018 and income of less than $1 million for the first nine months of 2017

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity The changes in shares of our common stock outstanding were as follows: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Beginning balance 288.4 292.8 Stock plans activity 1.0 1.1 Share repurchases (4.9 ) (4.9 ) Ending balance 284.5 289.0 From time to time, our Board of Directors authorizes the repurchase of shares of our common stock. In November 2017, our Board authorized the repurchase of up to $2.0 billion of our outstanding common stock. At September 30, 2018 , we had approximately $1.9 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. Our share repurchases were as follows: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 $ Shares $ Shares Shares repurchased under our share repurchase programs $ 925 4.5 $ 700 4.4 Shares repurchased to satisfy tax withholding obligations 91 0.4 84 0.5 Total share repurchases $ 1,016 4.9 $ 784 4.9 In March 2018 , our Board of Directors authorized a n 8.8% increase to our annual dividend payout rate from $3.19 to $3.47 per share. Our Board of Directors also declared dividends of $2.6025 per share during the first nine months of 2018 compared to dividends of $2.3925 per share during the first nine months of 2017 . Dividends are subject to quarterly approval by our Board of Directors. Stock-based Compensation Plans Restricted Stock and RSUs— During the first nine months of 2018 , we granted 0.8 million combined shares of restricted stock and RSUs with a weighted-average grant-date fair value of $213.11 per share , calculated under the intrinsic value method. These awards generally vest in equal installments on each of the second, third and fourth anniversary dates of the award’s grant date. LTPP— During the first nine months of 2018 , we granted RSUs subject to the 2018–2020 LTPP plan with an aggregate target award of 0.1 million units and a weighted-average grant-date fair value of $205.76 per share. The performance goals for the 2018–2020 LTPP award 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 inc luded in the aggregate target award numbers. The grant-date fair value is based upon the value determined under the intrinsic value method for the CFCF and ROIC portions of the award and the Monte Carlo simulation method for the TSR portion of the award. 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 certain limited circumstances other vesting conditions may apply. The impact attributable to these vesting conditions was expense of $4 million and $3 million in the third quarters of 2018 and 2017 , respectively, and expense of $8 million and $4 million in the first nine months of 2018 and 2017 , respectively. At September 30, 2018 , there were 174 thousand combined units and/or profits interests authorized for award under these plans. Accumulated Other Comprehensive Income (Loss) Accumulated 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, 2017 $ (7,843 ) $ (95 ) $ 6 $ (3 ) $ (7,935 ) Before tax amount 1,266 (19 ) (10 ) — 1,237 Tax (expense) or benefit (266 ) — 2 — (264 ) Net of tax amount 1,000 (19 ) (8 ) — 973 Reclassification of stranded tax effects (1,452 ) — 1 — (1,451 ) Balance at September 30, 2018 $ (8,295 ) $ (114 ) $ (1 ) $ (3 ) $ (8,413 ) Balance at December 31, 2016 $ (7,234 ) $ (175 ) $ — $ (2 ) $ (7,411 ) Before tax amount 396 71 11 — 478 Tax (expense) or benefit (138 ) — (4 ) — (142 ) Net of tax amount 258 71 7 — 336 Balance at October 1, 2017 $ (6,976 ) $ (104 ) $ 7 $ (2 ) $ (7,075 ) (1) Pension and PRB plans, net, is shown net of cumulative tax benefits of $2,205 million and $3,923 million at September 30, 2018 and December 31, 2017 , respectively. (2) Cash flow hedges are shown net of cumulative tax expense of zero and $3 million at September 30, 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 September 30, 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 ASU 2018-02 we elected to reclassify these stranded tax effects from AOCL to retained earnings in the first quarter of 2018. See “Note 2: Accounting Standards” 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 $1,013 million and $883 million before tax in the first nine months of 2018 and 2017 , respectively. This component of AOCL is included in the calculation of net periodic pension expense (income). See “Note 13: Pension and Other Employee Benefits” for additional details. We expect $1 million net of tax of net unrealized losses on our cash flow hedges at September 30, 2018 to be reclassified into earnings at then-current values over the next 12 months as the underlying hedged transactions occur.

Pension and Other Employee Bene

Pension and Other Employee Benefits	9 Months Ended
	Sep. 30, 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 PRB plans. 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 : (In millions) Sep 30, 2018 Dec 31, 2017 Marketable securities held in trust $ 665 $ 633 Included in marketable securities held in trust in the table above was $429 million and $410 million at September 30, 2018 and December 31, 2017 , respectively, related to the nonqualified defined contribution plans. The liabilities related to the nonqualified defined contribution plans were $441 million and $422 million at September 30, 2018 and December 31, 2017 , respectively. The components of net periodic pension expense (income) were as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Operating expense Service cost $ 123 $ 122 $ 378 $ 355 Non-operating expense Interest cost 248 281 753 815 Expected return on plan assets (351 ) (342 ) (1,077 ) (1,032 ) Amortization of prior service cost included in net periodic pension expense 1 2 4 4 Recognized net actuarial loss 325 324 1,013 883 Loss due to settlements 288 — 288 — Total pension non-service expense 511 265 981 670 Net periodic pension expense (income) $ 634 $ 387 $ 1,359 $ 1,025 Net periodic pension expense (income) includes income of $2 million and expense of less than $1 million from foreign Pension Benefits plans in the third quarters of 2018 and 2017 , respectively, and income of $6 million and expense of $1 million in the first nine months of 2018 and 2017 , respectively. Net periodic PRB expense was $6 million and $7 million in the third quarters of 2018 and 2017 , respectively, and $16 million and $18 million in the first nine months of 2018 and 2017 , respectively. Long-term pension and PRB liabilities consisted of the following: (In millions) Sep 30, 2018 Dec 31, 2017 Long-term pension liabilities $ 5,496 $ 7,515 Long-term PRB liabilities 369 368 Total long-term pension and PRB liabilities $ 5,865 $ 7,883 We made the following contributions to our pension and PRB plans: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Required pension contributions $ 857 $ 574 Discretionary pension contributions 1,250 — PRB contributions 15 17 Total $ 2,122 $ 591 We periodically evaluate whether to make discretionary contributions. 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 we recorded a net tax benefit of $95 million in the second quarter of 2018, 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 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. On a periodic basis, we update our actuarial estimate of the unfunded projected benefit obligation with updated census and investment valuation data for the end of the prior year. As a result of the update in the third quarter of 2018 , and related actuarial estimate changes, we recorded an increase to the unfunded projected benefit obligation for our pension of $40 million and an increase to the unfunded projected benefit obligation for our PRB plans of $7 million , with a corresponding increase of $37 million net of tax to AOCL in the third quarter of 2018 . As a result of the update in the third quarter of 2017, and related actuarial estimate changes, we recorded an increase to the unfunded projected benefit obligation for our pension of $492 million and an increase to the unfunded projected benefit obligation for our PRB plans of $5 million , with a corresponding increase of $324 million

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Taxes Paid, Net [Abstract]
Income Taxes	Income Taxes We are subject to income taxes in the U.S. and numerous foreign jurisdictions. We have participated in the IRS Compliance Assurance Process (CAP) program since 2011. In 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 with the adjustments 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 before the IRS Appeals division 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 September 30, 2018 . We are also under audit by multiple state and foreign tax authorities. 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 , which, in aggregate, decreased our effective tax rate by 17.3% and 5.0% in the third quarter and first nine months of 2018 , respectively. As discussed in “Note 13: Pension and Other Employee Benefits,” in the second quarter of 2018 we recorded a net tax benefit of $95 million related to the discretionary contribution to our pension plans, which decreased our effective tax rate by 4.3% in the first nine months of 2018 . 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 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. At September 30, 2018 , we have not fully completed our accounting for the tax effects of enactment of the 2017 Act. We made a reasonable estimate of the remeasurement of our existing deferred tax balances and the one-time transition tax for foreign earnings and profits (E&P), and recognized these provisional amounts in the fourth quarter of 2017. In the first nine months of 2018 , we recorded an $11 million tax expense related to the refinement of our provisional calculation for the one-time transition tax for foreign E&P. The refinement of this estimate was primarily due to the issuance of new guidance by the IRS, specifically IRS Notices 2018-07, 2018-13 and 2018-26, and may change when we finalize the calculation of post-1986 foreign E&P previously deferred from U.S. federal taxation and finalize the amounts held in cash or other specified assets. In the third quarter of 2018, we completed our data gathering and analysis based on the 2017 Act and guidance issued to date in 2018 as it relates to the remeasurement of our existing deferred tax balances and finalized our accounting for the tax effects of the enactment of the 2017 Act for this estimate. We will finalize the provisional estimate for the one-time transition tax before the end of 2018 after completing our reviews and analysis of any additional interpretations issued during this measurement period and our analysis of foreign E&P. With the adoption of a minimum tax on foreign earnings, we will be subject to tax on global intangible low-taxed income (GILTI) in future periods. We are continuing to evaluate this provision and will not make a policy election on how to account for GILTI (as a period expense or as part of our rate on deferred taxes) until we have the necessary information available, including the interpretations of the new rules, to analyze the impacts and complete our analysis. We will make an election before the end of 2018. Because we have not made a policy election, no amounts for GILTI are included in our deferred taxes. Although we believe the significant impacts from the 2017 Act are those described above, we continue to review and evaluate the other provisions of the 2017 Act. This review could result in changes to the amounts we have provisionally recorded. We will complete this review and evaluation before the end of 2018. 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 $84 million and $9 million at September 30, 2018 and December 31, 2017 , respectively, the majority of which would affect our earnings if recognized. The increase in the balance of our unrecognized tax benefits during the first nine months of 2018 is related to positions taken in the third quarter of 2018 on amended federal tax returns. We accrue interest and penalties related to unrecognized tax benefits in tax expense. Interest and penalties recognized during the third quarter and the first nine months of 2018 and 2017 and accrued as of September 30, 2018 and December 31, 2017

Business Segment Reporting

Business Segment Reporting	9 Months Ended
	Sep. 30, 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. 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: Three Months Ended Nine Months Ended Total Net Sales (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 1,493 $ 1,391 $ 4,496 $ 4,251 Intelligence, Information and Services 1,742 1,543 5,011 4,605 Missile Systems 2,082 1,945 5,981 5,602 Space and Airborne Systems 1,695 1,597 4,868 4,760 Forcepoint 173 170 462 452 Eliminations (377 ) (355 ) (1,110 ) (1,077 ) Total business segment sales 6,808 6,291 19,708 18,593 Acquisition Accounting Adjustments (2 ) (7 ) (10 ) (28 ) Total $ 6,806 $ 6,284 $ 19,698 $ 18,565 Three Months Ended Nine Months Ended Intersegment Sales (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 17 $ 13 $ 47 $ 45 Intelligence, Information and Services 162 159 491 509 Missile Systems 40 36 117 101 Space and Airborne Systems 149 140 436 406 Forcepoint 9 7 19 16 Total $ 377 $ 355 $ 1,110 $ 1,077 Three Months Ended Nine Months Ended Operating Income (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 241 $ 231 $ 776 $ 688 Intelligence, Information and Services 149 112 394 338 Missile Systems 257 280 700 732 Space and Airborne Systems 223 212 622 620 Forcepoint 18 23 3 41 Eliminations (45 ) (39 ) (126 ) (113 ) Total business segment operating income 843 819 2,369 2,306 Acquisition Accounting Adjustments (30 ) (39 ) (97 ) (123 ) FAS/CAS Operating Adjustment 365 348 1,072 978 Corporate 5 — (20 ) (30 ) Total $ 1,183 $ 1,128 $ 3,324 $ 3,131 Three Months Ended Nine Months Ended Intersegment Operating Income (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 2 $ 1 $ 5 $ 3 Intelligence, Information and Services 17 15 51 49 Missile Systems 4 4 11 10 Space and Airborne Systems 15 14 44 40 Forcepoint 7 5 15 11 Total $ 45 $ 39 $ 126 $ 113 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 Financial Accounting Standards (FAS) in accordance with U.S. GAAP and our pension and PRB expense under U.S. government Cost Accounting Standards (CAS). In the first quarter of 2018, we adopted the requirements of ASU 2017-07, The results of each segment only include pension and PRB expense under CAS that we generally recover through the pricing of our products and services to the U.S. government. Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, The results of each segment only include pension and PRB expense under CAS that we generally recover through the pricing of our products and services to the U.S. government. on a retrospective basis, which reclassified all components of FAS expense, other than service cost, to non-operating income. The results of each segment only include pension and PRB expense under CAS that we generally recover through the pricing of our products and services to the U.S. government. The pension and PRB components of the FAS/CAS Operating Adjustment were as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 FAS/CAS Pension Operating Adjustment $ 361 $ 346 $ 1,062 $ 969 FAS/CAS PRB Operating Adjustment 4 2 10 9 FAS/CAS Operating Adjustment $ 365 $ 348 $ 1,072 $ 978 Total assets for each of our business segments were as follows: Total Assets (in millions) Sep 30, 2018 Dec 31, 2017 Integrated Defense Systems (1) $ 4,956 $ 4,679 Intelligence, Information and Services (1) 4,298 4,230 Missile Systems (1) 7,960 7,338 Space and Airborne Systems (1) 6,741 6,696 Forcepoint (1) 2,494 2,543 Corporate 3,685 5,374 Total $ 30,134 $ 30,860 (1) Total assets includes intangible assets. Related amortization expense is included in Acquisition Accounting Adjustments. 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. Three Months Ended September 30, 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 $ 176 $ 260 $ 804 $ 611 $ 46 $ — $ 1,897 Cost-type contracts 429 1,076 668 644 4 — 2,821 Direct commercial sales and other U.S. sales Fixed-price contracts 1 31 6 29 52 — 119 Cost-type contracts — 4 — 1 — — 5 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 46 71 105 41 — — 263 Cost-type contracts 19 11 11 7 — — 48 Direct commercial sales and other foreign sales (1) Fixed-price contracts 182 50 34 58 17 — 341 Cost-type contracts 24 — — — — — 24 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 190 5 105 70 — — 370 Cost-type contracts 47 — 4 17 — — 68 Direct commercial sales and other foreign sales (1) Fixed-price contracts 277 1 209 22 7 — 516 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 46 2 31 15 — — 94 Cost-type contracts 7 — 16 2 — — 25 Direct commercial sales and other foreign sales (1) Fixed-price contracts 29 56 48 29 36 — 198 Cost-type contracts 3 13 1 — — — 17 Total net sales 1,476 1,580 2,042 1,546 162 — 6,806 Intersegment sales 17 162 40 149 9 (377 ) — Acquisition Accounting Adjustments — — — — 2 (2 ) — Reconciliation to business segment sales $ 1,493 $ 1,742 $ 2,082 $ 1,695 $ 173 $ (379 ) $ 6,806 (1) Excludes foreign military sales through the U.S. government. Three Months Ended September 30, 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 $ 606 $ 1,371 $ 1,478 $ 1,285 $ 102 $ 4,842 Asia/Pacific 271 132 150 106 17 676 Middle East and North Africa 514 6 318 109 7 954 All other (principally Europe) 85 71 96 46 36 334 Total net sales $ 1,476 $ 1,580 $ 2,042 $ 1,546 $ 162 $ 6,806 Three Months Ended September 30, 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) $ 605 $ 1,336 $ 1,472 $ 1,255 $ 50 $ 4,718 U.S. direct commercial sales and other U.S. sales 1 35 6 30 52 124 Foreign military sales through the U.S. government 355 89 272 152 — 868 Foreign direct commercial sales and other foreign sales (1) 515 120 292 109 60 1,096 Total net sales $ 1,476 $ 1,580 $ 2,042 $ 1,546 $ 162 $ 6,806 (1) Excludes foreign military sales through the U.S. government. Three Months Ended September 30, 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 $ 947 $ 476 $ 1,342 $ 875 $ 158 $ 3,798 Cost-type contracts 529 1,104 700 671 4 3,008 Total net sales $ 1,476 $ 1,580 $ 2,042 $ 1,546 $ 162 $ 6,806 Three Months Ended October 1, 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 $ 165 $ 278 $ 744 $ 562 $ 45 $ — $ 1,794 Cost-type contracts 366 903 485 638 4 — 2,396 Direct commercial sales and other U.S. sales Fixed-price contracts 3 32 — 7 51 — 93 Cost-type contracts — 1 — 1 — — 2 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 47 43 98 28 — — 216 Cost-type contracts 32 11 15 5 — — 63 Direct commercial sales and other foreign sales (1) Fixed-price contracts 140 50 78 64 14 — 346 Cost-type contracts 31 — — — — — 31 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 257 5 75 47 — — 384 Cost-type contracts 39 — 6 10 — — 55 Direct commercial sales and other foreign sales (1) Fixed-price contracts 245 5 281 50 6 — 587 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 1 — 27 14 — — 42 Cost-type contracts 5 — 21 1 — — 27 Direct commercial sales and other foreign sales (1) Fixed-price contracts 45 49 78 30 36 — 238 Cost-type contracts 2 7 1 — — — 10 Total net sales 1,378 1,384 1,909 1,457 156 — 6,284 Intersegment sales 13 159 36 140 7 (355 ) — Acquisition Accounting Adjustments — — — — 7 (7 ) — Reconciliation to business segment sales $ 1,391 $ 1,543 $ 1,945 $ 1,597 $ 170 $ (362 ) $ 6,284 (1) Excludes foreign military sales through the U.S. government. Three Months Ended October 1, 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 $ 534 $ 1,214 $ 1,229 $ 1,208 $ 100 $ 4,285 Asia/Pacific 250 104 191 97 14 656 Middle East and North Africa 541 10 362 107 6 1,026 All other (principally Europe) 53 56 127 45 36 317 Total net sales $ 1,378 $ 1,384 $ 1,909 $ 1,457 $ 156 $ 6,284 Three Months Ended October 1, 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) $ 531 $ 1,181 $ 1,229 $ 1,200 $ 49 $ 4,190 U.S. direct commercial sales and other U.S. sales 3 33 — 8 51 95 Foreign military sales through the U.S. government 381 59 242 105 — 787 Foreign direct commercial sales and other foreign sales (1) 463 111 438 144 56 1,212 Total net sales $ 1,378 $ 1,384 $ 1,909 $ 1,457 $ 156 $ 6,284 (1) Excludes foreign military sales through the U.S. government. Three Months Ended October 1, 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 $ 903 $ 462 $ 1,381 $ 802 $ 152 $ 3,700 Cost-type contracts 475 922 528 655 4 2,584 Total net sales $ 1,378 $ 1,384 $ 1,909 $ 1,457 $ 156 $ 6,284 Nine Months Ended September 30, 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 $ 601 $ 762 $ 2,039 $ 1,685 $ 87 $ — $ 5,174 Cost-type contracts 1,242 3,074 1,982 1,926 11 — 8,235 Direct commercial sales and other U.S. sales Fixed-price contracts 5 87 29 86 152 — 359 Cost-type contracts 1 13 — 2 — — 16 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 124 173 314 107 — — 718 Cost-type contracts 66 37 50 14 — — 167 Direct commercial sales and other foreign sales (1) Fixed-price contracts 516 147 121 159 49 — 992 Cost-type contracts 93 — 1 — — — 94 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 628 16 311 187 — — 1,142 Cost-type contracts 117 1 17 49 — — 184 Direct commercial sales and other foreign sales (1) Fixed-price contracts 852 10 679 78 22 — 1,641 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 72 2 89 37 — — 200 Cost-type contracts 22 — 60 4 — — 86 Direct commercial sales and other foreign sales (1) Fixed-price contracts 102 166 170 98 112 — 648 Cost-type contracts 8 32 2 — — — 42 Total net sales 4,449 4,520 5,864 4,432 433 — 19,698 Intersegment sales 47 491 117 436 19 (1,110 ) — Acquisition Accounting Adjustments — — — — 10 (10 ) — Reconciliation to business segment sales $ 4,496 $ 5,011 $ 5,981 $ 4,868 $ 462 $ (1,120 ) $ 19,698 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended September 30, 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 $ 1,849 $ 3,936 $ 4,050 $ 3,699 $ 250 $ 13,784 Asia/Pacific 799 357 486 280 49 1,971 Middle East and North Africa 1,597 27 1,007 314 22 2,967 All other (principally Europe) 204 200 321 139 112 976 Total net sales $ 4,449 $ 4,520 $ 5,864 $ 4,432 $ 433 $ 19,698 Nine Months Ended September 30, 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) $ 1,843 $ 3,836 $ 4,021 $ 3,611 $ 98 $ 13,409 U.S. direct commercial sales and other U.S. sales 6 100 29 88 152 375 Foreign military sales through the U.S. government 1,029 229 841 398 — 2,497 Foreign direct commercial sales and other foreign sales (1) 1,571 355 973 335 183 3,417 Total net sales $ 4,449 $ 4,520 $ 5,864 $ 4,432 $ 433 $ 19,698 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended September 30, 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 $ 2,900 $ 1,363 $ 3,752 $ 2,437 $ 422 $ 10,874 Cost-type contracts 1,549 3,157 2,112 1,995 11 8,824 Total net sales $ 4,449 $ 4,520 $ 5,864 $ 4,432 $ 433 $ 19,698 Nine Months Ended October 1, 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 $ 567 $ 798 $ 2,004 $ 1,605 $ 91 $ — $ 5,065 Cost-type contracts 1,123 2,676 1,475 2,018 10 — 7,302 Direct commercial sales and other U.S. sales Fixed-price contracts 6 102 1 19 147 — 275 Cost-type contracts 1 5 — 2 — — 8 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 131 131 285 70 — — 617 Cost-type contracts 104 40 49 8 — — 201 Direct commercial sales and other foreign sales (1) Fixed-price contracts 440 136 203 202 40 — 1,021 Cost-type contracts 112 — 1 — — — 113 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 785 14 268 143 — — 1,210 Cost-type contracts 117 1 17 16 — — 151 Direct commercial sales and other foreign sales (1) Fixed-price contracts 701 18 778 140 17 — 1,654 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 3 3 89 34 — — 129 Cost-type contracts 16 1 61 4 — — 82 Direct commercial sales and other foreign sales (1) Fixed-price contracts 90 152 267 93 103 — 705 Cost-type contracts 10 19 3 — — — 32 Total net sales 4,206 4,096 5,501 4,354 408 — 18,565 Intersegment sales 45 509 101 406 16 (1,077 ) — Acquisition Accounting Adjustments — — — — 28 (28 ) — Reconciliation to business segment sales $ 4,251 $ 4,605 $ 5,602 $ 4,760 $ 452 $ (1,105 ) $ 18,565 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended October 1, 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 $ 1,697 $ 3,581 $ 3,480 $ 3,644 $ 248 $ 12,650 Asia/Pacific 787 307 538 280 40 1,952 Middle East and North Africa 1,603 33 1,063 299 17 3,015 All other (principally Europe) 119 175 420 131 103 948 Total net sales $ 4,206 $ 4,096 $ 5,501 $ 4,354 $ 408 $ 18,565 Nine Months Ended October 1, 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) $ 1,690 $ 3,474 $ 3,479 $ 3,623 $ 101 $ 12,367 U.S. direct commercial sales and other U.S. sales 7 107 1 21 147 283 Foreign military sales through the U.S. government 1,156 190 769 275 — 2,390 Foreign direct commercial sales and other foreign sales (1) 1,353 325 1,252 435 160 3,525 Total net sales $ 4,206 $ 4,096 $ 5,501 $ 4,354 $ 408 $ 18,565 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended October 1, 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 $ 2,723 $ 1,354 $ 3,895 $ 2,306 $ 398 $ 10,676 Cost-type contracts 1,483 2,742 1,606 2,048 10 7,889 Total net sales $ 4,206 $ 4,096 $ 5,501 $ 4,354 $ 408 $ 18,565

Remaining Performance Obligatio

Remaining Performance Obligations	9 Months Ended
	Sep. 30, 2018
Revenue, Performance Obligation [Abstract]
Remaining Performance Obligations	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 September 30, 2018 , the aggregate amount of the transaction price allocated to remaining performance obligations was $41,599 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. 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 $2.3 billion of our remaining performance obligations at September 30, 2018

Accounting Standards (Tables)

Accounting Standards (Tables)	9 Months Ended
	Sep. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
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 $ — $ — $ — $ — $ — $ —

Changes in Estimates under Pe_2

Changes in Estimates under Percentage of Completion Contract Accounting (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Net EAC Adjustments	Net EAC adjustments had the following impact on our operating results: Three Months Ended Nine Months Ended (In millions, except per share amounts) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Operating income $ 124 $ 149 $ 368 $ 315 Income from continuing operations attributable to Raytheon Company 98 97 291 205 Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company $ 0.34 $ 0.33 $ 1.01 $ 0.70

Earnings per Share (EPS) (Table

Earnings per Share (EPS) (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
EPS from Continuing Operations	EPS from continuing operations attributable to Raytheon Company common stockholders and unvested stock-based payment awards was as follows: Three Months Ended Nine Months Ended Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Basic EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 0.87 $ 0.79 $ 2.60 $ 2.39 Undistributed earnings 1.38 1.18 4.64 3.20 Total $ 2.25 $ 1.97 $ 7.24 $ 5.59 Diluted EPS attributable to Raytheon Company common stockholders: Distributed earnings $ 0.87 $ 0.80 $ 2.60 $ 2.39 Undistributed earnings 1.38 1.17 4.63 3.20 Total $ 2.25 $ 1.97 $ 7.23 $ 5.59
Income Attributable to Participating Securities	Income attributable to participating securities was as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Income from continuing operations attributable to participating securities $ 6 $ 6 $ 21 $ 20 Income (loss) from discontinued operations, net of tax attributable to participating securities — — — — Net income attributable to participating securities $ 6 $ 6 $ 21 $ 20
Weighted-Average Shares Outstanding for Basic and Diluted EPS	The weighted-average shares outstanding for basic and diluted EPS were as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Shares for basic EPS (1) 285.7 290.7 287.2 291.6 Effect of dilutive securities 0.3 0.3 0.3 0.3 Shares for diluted EPS 286.0 291.0 287.5 291.9 (1) Includes 2.8 million and 3.2 million participating securities in the third quarters of 2018 and 2017 , respectively, and 3.0 million and 3.5 million participating securities in the first nine months of 2018 and 2017

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following : (In millions) Sep 30, 2018 Dec 31, 2017 Materials and purchased parts $ 77 $ 69 Work in process 707 504 Finished goods 20 21 Total $ 804 $ 594

Contract Assets and Contract _2

Contract Assets and Contract Liabilities (Tables)	9 Months Ended
	Sep. 30, 2018
Contract with Customer, Asset and Liability [Abstract]
Net Contract Assets (Liabilities)	Net contract assets (liabilities) consisted of the following : (In millions, except percentages) Sep 30, 2018 Dec 31, 2017 $ Change % Change Contract assets $ 5,715 $ 5,247 $ 468 9 % Contract liabilities—current (2,931 ) (2,927 ) (4 ) — % Contract liabilities—noncurrent (134 ) (127 ) (7 ) (6 )% Net contract assets (liabilities) $ 2,650 $ 2,193 $ 457 21 %

Acquisitions, Divestitures an_2

Acquisitions, Divestitures and Goodwill (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
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, 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 ) (1 ) — — — (3 ) Balance at September 30, 2018 $ 1,704 $ 2,966 $ 4,154 $ 4,103 $ 1,938 $ 14,865 (1) At September 30, 2018 , Forcepoint’s fair value was estimated to exceed its net book value by approximately $1.7 billion

Derivative and Other Financia_2

Derivative and Other Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Summary of Derivative Instruments [Abstract]
Schedule of Long-term Debt Details	The carrying value and estimated fair value of long-term debt were as follows: (In millions) Sep 30, 2018 Dec 31, 2017 Carrying value of long-term debt $ 4,753 $ 4,750 Fair value of long-term debt 5,035 5,293
Supplemental Cash Flow Information	The following table provides a reconciliation of cash and cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of such amounts in the consolidated statements of cash flows: (In millions) Sep 30, 2018 Dec 31, 2017 Cash and cash equivalents $ 2,073 $ 3,103 Restricted cash 12 12 Cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 2,085 $ 3,115

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Estimates of Total Remediation Costs	Our estimates regarding remediation costs to be incurred were as follows: (In millions, except percentages) Sep 30, 2018 Dec 31, 2017 Total remediation costs—undiscounted $ 203 $ 206 Weighted-average discount rate 5.2 % 5.2 % Total remediation costs—discounted $ 136 $ 142 Recoverable portion 88 92
Stated Values Outstanding	The stated values outstanding consisted of the following : (In millions) Sep 30, 2018 Dec 31, 2017 Guarantees $ 208 $ 216 Letters of credit 2,652 2,416 Surety bonds 166 166

Forcepoint Joint Venture (Table

Forcepoint Joint Venture (Tables)	9 Months Ended
	Sep. 30, 2018
Noncontrolling Interest [Line Items]
Redeemable Noncontrolling Interest Rollforward	A rollforward of redeemable noncontrolling interest was as follows: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Beginning balance $ 512 $ 449 Net income (loss) (22 ) (17 ) Other comprehensive income (loss), net of tax (1) — — Contribution from noncontrolling interest — 8 Adjustment of noncontrolling interest to redemption value 70 (51 ) Ending balance $ 560 $ 389 (1) Other comprehensive income (loss), net of tax, was a loss of less than $1 million for the first nine months of 2018 and income of less than $1 million for the first nine months of 2017

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 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: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Beginning balance 288.4 292.8 Stock plans activity 1.0 1.1 Share repurchases (4.9 ) (4.9 ) Ending balance 284.5 289.0
Repurchases of Common Stock	Our share repurchases were as follows: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 $ Shares $ Shares Shares repurchased under our share repurchase programs $ 925 4.5 $ 700 4.4 Shares repurchased to satisfy tax withholding obligations 91 0.4 84 0.5 Total share repurchases $ 1,016 4.9 $ 784 4.9
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, 2017 $ (7,843 ) $ (95 ) $ 6 $ (3 ) $ (7,935 ) Before tax amount 1,266 (19 ) (10 ) — 1,237 Tax (expense) or benefit (266 ) — 2 — (264 ) Net of tax amount 1,000 (19 ) (8 ) — 973 Reclassification of stranded tax effects (1,452 ) — 1 — (1,451 ) Balance at September 30, 2018 $ (8,295 ) $ (114 ) $ (1 ) $ (3 ) $ (8,413 ) Balance at December 31, 2016 $ (7,234 ) $ (175 ) $ — $ (2 ) $ (7,411 ) Before tax amount 396 71 11 — 478 Tax (expense) or benefit (138 ) — (4 ) — (142 ) Net of tax amount 258 71 7 — 336 Balance at October 1, 2017 $ (6,976 ) $ (104 ) $ 7 $ (2 ) $ (7,075 ) (1) Pension and PRB plans, net, is shown net of cumulative tax benefits of $2,205 million and $3,923 million at September 30, 2018 and December 31, 2017 , respectively. (2) Cash flow hedges are shown net of cumulative tax expense of zero and $3 million at September 30, 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 September 30, 2018 and December 31, 2017

Pension and Other Employee Be_2

Pension and Other Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table [Line Items]
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 : (In millions) Sep 30, 2018 Dec 31, 2017 Marketable securities held in trust $ 665 $ 633
Schedule of Pension and PRB Liabilities	Long-term pension and PRB liabilities consisted of the following: (In millions) Sep 30, 2018 Dec 31, 2017 Long-term pension liabilities $ 5,496 $ 7,515 Long-term PRB liabilities 369 368 Total long-term pension and PRB liabilities $ 5,865 $ 7,883
Schedule of Pension and PRB Contributions	We made the following contributions to our pension and PRB plans: Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Required pension contributions $ 857 $ 574 Discretionary pension contributions 1,250 — PRB contributions 15 17 Total $ 2,122 $ 591
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table [Line Items]
Components of Net Periodic Pension Expense	The components of net periodic pension expense (income) were as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Operating expense Service cost $ 123 $ 122 $ 378 $ 355 Non-operating expense Interest cost 248 281 753 815 Expected return on plan assets (351 ) (342 ) (1,077 ) (1,032 ) Amortization of prior service cost included in net periodic pension expense 1 2 4 4 Recognized net actuarial loss 325 324 1,013 883 Loss due to settlements 288 — 288 — Total pension non-service expense 511 265 981 670 Net periodic pension expense (income) $ 634 $ 387 $ 1,359 $ 1,025

Business Segment Reporting (Tab

Business Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Schedule of Operating Performance	Segment financial results were as follows: Three Months Ended Nine Months Ended Total Net Sales (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 1,493 $ 1,391 $ 4,496 $ 4,251 Intelligence, Information and Services 1,742 1,543 5,011 4,605 Missile Systems 2,082 1,945 5,981 5,602 Space and Airborne Systems 1,695 1,597 4,868 4,760 Forcepoint 173 170 462 452 Eliminations (377 ) (355 ) (1,110 ) (1,077 ) Total business segment sales 6,808 6,291 19,708 18,593 Acquisition Accounting Adjustments (2 ) (7 ) (10 ) (28 ) Total $ 6,806 $ 6,284 $ 19,698 $ 18,565 Three Months Ended Nine Months Ended Intersegment Sales (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 17 $ 13 $ 47 $ 45 Intelligence, Information and Services 162 159 491 509 Missile Systems 40 36 117 101 Space and Airborne Systems 149 140 436 406 Forcepoint 9 7 19 16 Total $ 377 $ 355 $ 1,110 $ 1,077 Three Months Ended Nine Months Ended Operating Income (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 241 $ 231 $ 776 $ 688 Intelligence, Information and Services 149 112 394 338 Missile Systems 257 280 700 732 Space and Airborne Systems 223 212 622 620 Forcepoint 18 23 3 41 Eliminations (45 ) (39 ) (126 ) (113 ) Total business segment operating income 843 819 2,369 2,306 Acquisition Accounting Adjustments (30 ) (39 ) (97 ) (123 ) FAS/CAS Operating Adjustment 365 348 1,072 978 Corporate 5 — (20 ) (30 ) Total $ 1,183 $ 1,128 $ 3,324 $ 3,131 Three Months Ended Nine Months Ended Intersegment Operating Income (in millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 Integrated Defense Systems $ 2 $ 1 $ 5 $ 3 Intelligence, Information and Services 17 15 51 49 Missile Systems 4 4 11 10 Space and Airborne Systems 15 14 44 40 Forcepoint 7 5 15 11 Total $ 45 $ 39 $ 126 $ 113
Components of FASCAS Operating Adjustment	The pension and PRB components of the FAS/CAS Operating Adjustment were as follows: Three Months Ended Nine Months Ended (In millions) Sep 30, 2018 Oct 1, 2017 Sep 30, 2018 Oct 1, 2017 FAS/CAS Pension Operating Adjustment $ 361 $ 346 $ 1,062 $ 969 FAS/CAS PRB Operating Adjustment 4 2 10 9 FAS/CAS Operating Adjustment $ 365 $ 348 $ 1,072 $ 978
Total Assets	Total assets for each of our business segments were as follows: Total Assets (in millions) Sep 30, 2018 Dec 31, 2017 Integrated Defense Systems (1) $ 4,956 $ 4,679 Intelligence, Information and Services (1) 4,298 4,230 Missile Systems (1) 7,960 7,338 Space and Airborne Systems (1) 6,741 6,696 Forcepoint (1) 2,494 2,543 Corporate 3,685 5,374 Total $ 30,134 $ 30,860 (1)
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. Three Months Ended September 30, 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 $ 176 $ 260 $ 804 $ 611 $ 46 $ — $ 1,897 Cost-type contracts 429 1,076 668 644 4 — 2,821 Direct commercial sales and other U.S. sales Fixed-price contracts 1 31 6 29 52 — 119 Cost-type contracts — 4 — 1 — — 5 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 46 71 105 41 — — 263 Cost-type contracts 19 11 11 7 — — 48 Direct commercial sales and other foreign sales (1) Fixed-price contracts 182 50 34 58 17 — 341 Cost-type contracts 24 — — — — — 24 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 190 5 105 70 — — 370 Cost-type contracts 47 — 4 17 — — 68 Direct commercial sales and other foreign sales (1) Fixed-price contracts 277 1 209 22 7 — 516 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 46 2 31 15 — — 94 Cost-type contracts 7 — 16 2 — — 25 Direct commercial sales and other foreign sales (1) Fixed-price contracts 29 56 48 29 36 — 198 Cost-type contracts 3 13 1 — — — 17 Total net sales 1,476 1,580 2,042 1,546 162 — 6,806 Intersegment sales 17 162 40 149 9 (377 ) — Acquisition Accounting Adjustments — — — — 2 (2 ) — Reconciliation to business segment sales $ 1,493 $ 1,742 $ 2,082 $ 1,695 $ 173 $ (379 ) $ 6,806 (1) Excludes foreign military sales through the U.S. government. Three Months Ended September 30, 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 $ 606 $ 1,371 $ 1,478 $ 1,285 $ 102 $ 4,842 Asia/Pacific 271 132 150 106 17 676 Middle East and North Africa 514 6 318 109 7 954 All other (principally Europe) 85 71 96 46 36 334 Total net sales $ 1,476 $ 1,580 $ 2,042 $ 1,546 $ 162 $ 6,806 Three Months Ended September 30, 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) $ 605 $ 1,336 $ 1,472 $ 1,255 $ 50 $ 4,718 U.S. direct commercial sales and other U.S. sales 1 35 6 30 52 124 Foreign military sales through the U.S. government 355 89 272 152 — 868 Foreign direct commercial sales and other foreign sales (1) 515 120 292 109 60 1,096 Total net sales $ 1,476 $ 1,580 $ 2,042 $ 1,546 $ 162 $ 6,806 (1) Excludes foreign military sales through the U.S. government. Three Months Ended September 30, 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 $ 947 $ 476 $ 1,342 $ 875 $ 158 $ 3,798 Cost-type contracts 529 1,104 700 671 4 3,008 Total net sales $ 1,476 $ 1,580 $ 2,042 $ 1,546 $ 162 $ 6,806 Three Months Ended October 1, 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 $ 165 $ 278 $ 744 $ 562 $ 45 $ — $ 1,794 Cost-type contracts 366 903 485 638 4 — 2,396 Direct commercial sales and other U.S. sales Fixed-price contracts 3 32 — 7 51 — 93 Cost-type contracts — 1 — 1 — — 2 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 47 43 98 28 — — 216 Cost-type contracts 32 11 15 5 — — 63 Direct commercial sales and other foreign sales (1) Fixed-price contracts 140 50 78 64 14 — 346 Cost-type contracts 31 — — — — — 31 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 257 5 75 47 — — 384 Cost-type contracts 39 — 6 10 — — 55 Direct commercial sales and other foreign sales (1) Fixed-price contracts 245 5 281 50 6 — 587 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 1 — 27 14 — — 42 Cost-type contracts 5 — 21 1 — — 27 Direct commercial sales and other foreign sales (1) Fixed-price contracts 45 49 78 30 36 — 238 Cost-type contracts 2 7 1 — — — 10 Total net sales 1,378 1,384 1,909 1,457 156 — 6,284 Intersegment sales 13 159 36 140 7 (355 ) — Acquisition Accounting Adjustments — — — — 7 (7 ) — Reconciliation to business segment sales $ 1,391 $ 1,543 $ 1,945 $ 1,597 $ 170 $ (362 ) $ 6,284 (1) Excludes foreign military sales through the U.S. government. Three Months Ended October 1, 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 $ 534 $ 1,214 $ 1,229 $ 1,208 $ 100 $ 4,285 Asia/Pacific 250 104 191 97 14 656 Middle East and North Africa 541 10 362 107 6 1,026 All other (principally Europe) 53 56 127 45 36 317 Total net sales $ 1,378 $ 1,384 $ 1,909 $ 1,457 $ 156 $ 6,284 Three Months Ended October 1, 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) $ 531 $ 1,181 $ 1,229 $ 1,200 $ 49 $ 4,190 U.S. direct commercial sales and other U.S. sales 3 33 — 8 51 95 Foreign military sales through the U.S. government 381 59 242 105 — 787 Foreign direct commercial sales and other foreign sales (1) 463 111 438 144 56 1,212 Total net sales $ 1,378 $ 1,384 $ 1,909 $ 1,457 $ 156 $ 6,284 (1) Excludes foreign military sales through the U.S. government. Three Months Ended October 1, 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 $ 903 $ 462 $ 1,381 $ 802 $ 152 $ 3,700 Cost-type contracts 475 922 528 655 4 2,584 Total net sales $ 1,378 $ 1,384 $ 1,909 $ 1,457 $ 156 $ 6,284 Nine Months Ended September 30, 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 $ 601 $ 762 $ 2,039 $ 1,685 $ 87 $ — $ 5,174 Cost-type contracts 1,242 3,074 1,982 1,926 11 — 8,235 Direct commercial sales and other U.S. sales Fixed-price contracts 5 87 29 86 152 — 359 Cost-type contracts 1 13 — 2 — — 16 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 124 173 314 107 — — 718 Cost-type contracts 66 37 50 14 — — 167 Direct commercial sales and other foreign sales (1) Fixed-price contracts 516 147 121 159 49 — 992 Cost-type contracts 93 — 1 — — — 94 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 628 16 311 187 — — 1,142 Cost-type contracts 117 1 17 49 — — 184 Direct commercial sales and other foreign sales (1) Fixed-price contracts 852 10 679 78 22 — 1,641 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 72 2 89 37 — — 200 Cost-type contracts 22 — 60 4 — — 86 Direct commercial sales and other foreign sales (1) Fixed-price contracts 102 166 170 98 112 — 648 Cost-type contracts 8 32 2 — — — 42 Total net sales 4,449 4,520 5,864 4,432 433 — 19,698 Intersegment sales 47 491 117 436 19 (1,110 ) — Acquisition Accounting Adjustments — — — — 10 (10 ) — Reconciliation to business segment sales $ 4,496 $ 5,011 $ 5,981 $ 4,868 $ 462 $ (1,120 ) $ 19,698 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended September 30, 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 $ 1,849 $ 3,936 $ 4,050 $ 3,699 $ 250 $ 13,784 Asia/Pacific 799 357 486 280 49 1,971 Middle East and North Africa 1,597 27 1,007 314 22 2,967 All other (principally Europe) 204 200 321 139 112 976 Total net sales $ 4,449 $ 4,520 $ 5,864 $ 4,432 $ 433 $ 19,698 Nine Months Ended September 30, 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) $ 1,843 $ 3,836 $ 4,021 $ 3,611 $ 98 $ 13,409 U.S. direct commercial sales and other U.S. sales 6 100 29 88 152 375 Foreign military sales through the U.S. government 1,029 229 841 398 — 2,497 Foreign direct commercial sales and other foreign sales (1) 1,571 355 973 335 183 3,417 Total net sales $ 4,449 $ 4,520 $ 5,864 $ 4,432 $ 433 $ 19,698 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended September 30, 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 $ 2,900 $ 1,363 $ 3,752 $ 2,437 $ 422 $ 10,874 Cost-type contracts 1,549 3,157 2,112 1,995 11 8,824 Total net sales $ 4,449 $ 4,520 $ 5,864 $ 4,432 $ 433 $ 19,698 Nine Months Ended October 1, 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 $ 567 $ 798 $ 2,004 $ 1,605 $ 91 $ — $ 5,065 Cost-type contracts 1,123 2,676 1,475 2,018 10 — 7,302 Direct commercial sales and other U.S. sales Fixed-price contracts 6 102 1 19 147 — 275 Cost-type contracts 1 5 — 2 — — 8 Asia/Pacific Foreign military sales through the U.S. government Fixed-price contracts 131 131 285 70 — — 617 Cost-type contracts 104 40 49 8 — — 201 Direct commercial sales and other foreign sales (1) Fixed-price contracts 440 136 203 202 40 — 1,021 Cost-type contracts 112 — 1 — — — 113 Middle East and North Africa Foreign military sales through the U.S. government Fixed-price contracts 785 14 268 143 — — 1,210 Cost-type contracts 117 1 17 16 — — 151 Direct commercial sales and other foreign sales (1) Fixed-price contracts 701 18 778 140 17 — 1,654 Cost-type contracts — — — — — — — All other (principally Europe) Foreign military sales through the U.S. government Fixed-price contracts 3 3 89 34 — — 129 Cost-type contracts 16 1 61 4 — — 82 Direct commercial sales and other foreign sales (1) Fixed-price contracts 90 152 267 93 103 — 705 Cost-type contracts 10 19 3 — — — 32 Total net sales 4,206 4,096 5,501 4,354 408 — 18,565 Intersegment sales 45 509 101 406 16 (1,077 ) — Acquisition Accounting Adjustments — — — — 28 (28 ) — Reconciliation to business segment sales $ 4,251 $ 4,605 $ 5,602 $ 4,760 $ 452 $ (1,105 ) $ 18,565 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended October 1, 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 $ 1,697 $ 3,581 $ 3,480 $ 3,644 $ 248 $ 12,650 Asia/Pacific 787 307 538 280 40 1,952 Middle East and North Africa 1,603 33 1,063 299 17 3,015 All other (principally Europe) 119 175 420 131 103 948 Total net sales $ 4,206 $ 4,096 $ 5,501 $ 4,354 $ 408 $ 18,565 Nine Months Ended October 1, 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) $ 1,690 $ 3,474 $ 3,479 $ 3,623 $ 101 $ 12,367 U.S. direct commercial sales and other U.S. sales 7 107 1 21 147 283 Foreign military sales through the U.S. government 1,156 190 769 275 — 2,390 Foreign direct commercial sales and other foreign sales (1) 1,353 325 1,252 435 160 3,525 Total net sales $ 4,206 $ 4,096 $ 5,501 $ 4,354 $ 408 $ 18,565 (1) Excludes foreign military sales through the U.S. government. Nine Months Ended October 1, 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 $ 2,723 $ 1,354 $ 3,895 $ 2,306 $ 398 $ 10,676 Cost-type contracts 1,483 2,742 1,606 2,048 10 7,889 Total net sales $ 4,206 $ 4,096 $ 5,501 $ 4,354 $ 408 $ 18,565

Accounting Standards (Narrative

Accounting Standards (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Apr. 01, 2018	Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of stranded tax effects		$ 0
ASU 2016-02 [Member] | Assets, Total [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		1,000,000,000
ASU 2016-02 [Member] | Liabilities, Total [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(1,000,000,000)
AOCI Attributable to Parent [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of stranded tax effects	$ (1,451,000,000)	(1,451,000,000)
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of stranded tax effects	$ 1,451,000,000	$ 1,451,000,000

Accounting Standards (New Accou

Accounting Standards (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 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)
Operating 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	(230,000,000)	(270,000,000)	(206,000,000)	(207,000,000)	(913,000,000)	(601,000,000)
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

Changes in Estimates under Pe_3

Changes in Estimates under Percentage of Completion Contract Accounting (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Accounting Policies [Abstract]
Performance Obligation Satisfied in Previous Period	$ 175	$ 184	$ 475	$ 398

Changes in Estimates under Pe_4

Changes in Estimates under Percentage of Completion Contract Accounting (Net EAC adjustments) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Change in Accounting Estimate [Line Items]
Operating income	$ 1,183	$ 1,128	$ 3,324	$ 3,131
Income from continuing operations attributable to Raytheon Company	$ 644	$ 573	$ 2,077	$ 1,629
Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company	$ 2.25	$ 1.97	$ 7.23	$ 5.59
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income	$ 124	$ 149	$ 368	$ 315
Income from continuing operations attributable to Raytheon Company	$ 98	$ 97	$ 291	$ 205
Diluted earnings per share (EPS) from continuing operations attributable to Raytheon Company	$ 0.34	$ 0.33	$ 1.01	$ 0.70

Earnings per Share (EPS) (Narra

Earnings per Share (EPS) (Narrative) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Earnings Per Share
Favorable (unfavorable) impact to EPS, Diluted	$ 2.25	$ 1.97	$ 7.23	$ 5.60
Favorable (unfavorable) impact to EPS, Basic	2.25	1.97	7.23	5.60
Redemption Value Adjustment in Excess of Fair Value [Member]
Earnings Per Share
Favorable (unfavorable) impact to EPS, Diluted	0	0	0	0.01
Favorable (unfavorable) impact to EPS, Basic	$ 0	$ 0	$ 0	$ 0.01

Earnings per Share (EPS) (EPS f

Earnings per Share (EPS) (EPS from Continuing Operations) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Basic EPS attributable to Raytheon Company common stockholders:
Distributed earnings	$ 0.87	$ 0.79	$ 2.60	$ 2.39
Undistributed earnings	1.38	1.18	4.64	3.20
Total	2.25	1.97	7.24	5.59
Diluted EPS attributable to Raytheon Company common stockholders:
Distributed earnings	0.87	0.80	2.60	2.39
Undistributed earnings	1.38	1.17	4.63	3.20
Total	$ 2.25	$ 1.97	$ 7.23	$ 5.59

Earnings per Share (EPS) (Incom

Earnings per Share (EPS) (Income from participating securities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Earnings Per Share
Net income (loss) attributable to participating securities	$ 6	$ 6	$ 21	$ 20
Continuing Operations [Member]
Earnings Per Share
Net income (loss) attributable to participating securities	6	6	21	20
Discontinued Operations [Member]
Earnings Per Share
Net income (loss) attributable to participating securities	$ 0	$ 0	$ 0	$ 0

Earnings per Share (EPS) (Weigh

Earnings per Share (EPS) (Weighted-Average Shares) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Earnings Per Share [Abstract]
Shares for basic EPS(1)	285.7	290.7	287.2	291.6
Effect of dilutive securities	0.3	0.3	0.3	0.3
Shares for diluted EPS	286	291	287.5	291.9
Shares for basic EPS, Participating Securities	2.8	3.2	3	3.5

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Deferred precontract costs, work in process inventories	$ 157	$ 101

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Materials and purchased parts	$ 77	$ 69
Work in process	707	504
Finished goods	20	21
Total	$ 804	$ 594

Contract Assets and Contract _3

Contract Assets and Contract Liabilities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Contract with Customer, Asset and Liability [Abstract]
Change in net contract assets (liabilities)			$ 457
Change in contract assets			468
Total contract value related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	$ 2,300		2,300
Sales recognized for work performed to date related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	800		800
Advances received to date on contracts related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	800		800
Revenue recognized on contract liabilities	$ 250	$ 247	$ 1,213	$ 1,199

Contract Assets and Liabilities

Contract Assets and Liabilities (Net Contract Assets (Liabilities)) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Contract with Customer, Asset and Liability [Abstract]
Contract assets	$ 5,715	$ 5,247
Change in contract assets	$ 468
Percent change in contract assets	9.00%
Contract liabilities—current	$ (2,931)	(2,927)
Change in contract liabilities, current	$ (4)
Percent change in contract liabilities, current	0.00%
Contract liabilities—noncurrent	$ (134)	(127)
Change in contract liabilities, noncurrent	$ (7)
Percent change in contract liabilities, noncurrent	(6.00%)
Net contract assets (liabilities)	$ 2,650	$ 2,193
Change in net contract assets (liabilities)	$ 457
Percent change in net contract assets (liabilities)	21.00%

Deferred Commissions (Narrative

Deferred Commissions (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Dec. 31, 2017
Deferred Costs [Abstract]
Deferred Commission	$ 46		$ 46		$ 37
Amortization of Deferred Commissions	$ 14	$ 7	$ 29	$ 17

Acquisitions, Divestitures an_3

Acquisitions, Divestitures and Goodwill (Narrative) (Details)	1 Months Ended	9 Months Ended
	May 31, 2018USD ($)	Sep. 30, 2018USD ($)	Oct. 01, 2017USD ($)
Business Acquisition [Line Items]
Acquisitions		0
Proceeds from sale of business, net of transaction costs	$ 11,000,000	$ 11,000,000	$ 0
Gain recognized from sale of business, before tax	8,000,000
Gain recognized from sale of business, net of tax	$ 5,000,000

Acquisitions, Divestitures an_4

Acquisitions, Divestitures and Goodwill (Rollforward of Goodwill by Segments) (Details)	9 Months Ended
	Sep. 30, 2018USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 14,871,000,000
Acquisitions and divestitures	(3,000,000)
Effect of foreign exchange rates and other	(3,000,000)
Ending balance	14,865,000,000
Forcepoint estimated fair value in excess of book value	1,700,000,000
Integrated Defense Systems
Goodwill [Roll Forward]
Beginning balance	1,706,000,000
Acquisitions and divestitures	0
Effect of foreign exchange rates and other	(2,000,000)
Ending balance	1,704,000,000
Intelligence, Information and Services
Goodwill [Roll Forward]
Beginning balance	2,967,000,000
Acquisitions and divestitures	0
Effect of foreign exchange rates and other	(1,000,000)
Ending balance	2,966,000,000
Missile Systems
Goodwill [Roll Forward]
Beginning balance	4,154,000,000
Acquisitions and divestitures	0
Effect of foreign exchange rates and other	0
Ending balance	4,154,000,000
Space and Airborne Systems
Goodwill [Roll Forward]
Beginning balance	4,106,000,000
Acquisitions and divestitures	(3,000,000)
Effect of foreign exchange rates and other	0
Ending balance	4,103,000,000
Forcepoint
Goodwill [Roll Forward]
Beginning balance	1,938,000,000
Acquisitions and divestitures	0
Effect of foreign exchange rates and other	0
Ending balance	$ 1,938,000,000

Derivative and Other Financia_3

Derivative and Other Financial Instruments (Narrative) (Details)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2018USD ($)Swap	Oct. 01, 2017USD ($)	Jul. 02, 2017USD ($)	Sep. 30, 2018USD ($)Swap	Oct. 01, 2017USD ($)	Dec. 31, 2017USD ($)Swap
Derivative and Other Financial Instruments
Unrealized losses on investments, net of tax				$ 0	$ 0
Sales of short-term investments	$ 0	$ 0		0	0
Commercial paper	$ 300,000,000			$ 300,000,000		$ 300,000,000
Commercial paper, weighted-average interest rate	2.301%			2.301%		1.583%
Commercial paper, weighted-average original maturity period				8 days		20 days
Commercial paper, maximum original maturity period				90 days
Repayments of Debt			$ 591,000,000
Loss on repayment of long-term debt, before tax			39,000,000	$ 0	39,000,000
Loss on repayment of long-term debt, net of tax			$ 25,000,000
Maximum [Member]
Derivative and Other Financial Instruments
Foreign currency forward contracts, off-set or netting provisions, fair value of counterparty default exposure	$ 1,000,000			$ 1,000,000		$ 1,000,000
Unrealized losses on investments, net of tax		$ 1,000,000			$ 1,000,000
Interest Rate Swap [Member]
Derivative and Other Financial Instruments
Interest rate swaps outstanding | Swap	0			0		0
Foreign Exchange Forward [Member]
Derivative and Other Financial Instruments
Notional Amount on foreign currency contracts	$ 1,936,000,000			$ 1,936,000,000		$ 1,354,000,000
Foreign Currency Forward Contracts Net Notional Exposure	1,007,000,000			1,007,000,000		525,000,000
Fair Value, Inputs, Level 2 [Member]
Derivative and Other Financial Instruments
Derivative Asset	19,000,000			19,000,000		28,000,000
Derivative Liability	18,000,000			18,000,000		17,000,000
Short-term investments	$ 0			$ 0		$ 297,000,000

Derivative and Other Financia_4

Derivative and Other Financial Instruments (Schedule of Long Term Debt Details) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Carrying value of long-term debt	$ 4,753	$ 4,750
Fair value of long-term debt	$ 5,035	$ 5,293

Derivative and Other Financia_5

Derivative and Other Financial Instruments (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Oct. 01, 2017	Dec. 31, 2016
Summary of Derivative Instruments [Abstract]
Cash and cash equivalents	$ 2,073	$ 3,103
Restricted cash	12	12
Cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 2,085	$ 3,115	$ 2,323	$ 3,303

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Commitments and Contingencies [Line Items]
Letters of credit, amount outstanding	$ 2,652	$ 2,416
Notional value of offset agreements with certain customers in foreign countries	9,400
Thales- Raytheon Systems Air and Missile Defense Command and Control S.A.S. (TRS AMDC2) [Member]
Commitments and Contingencies [Line Items]
Letters of credit, amount outstanding	54	47
Estimated liability related to guarantees and letters of credit	$ 1	$ 2

Commitments and Contingencies_3

Commitments and Contingencies (Estimates of Total Remediation Costs) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Environmental Remediation Obligations [Abstract]
Total remediation costs—undiscounted	$ 203	$ 206
Weighted-average discount rate	5.20%	5.20%
Total remediation costs—discounted	$ 136	$ 142
Recoverable portion	$ 88	$ 92

Commitments and Contingencies_4

Commitments and Contingencies (Stated Values Outstanding) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Guarantees	$ 208	$ 216
Letters of credit	2,652	2,416
Surety bonds	$ 166	$ 166

Forcepoint Joint Venture (Narra

Forcepoint Joint Venture (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Oct. 01, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Vista Equity Partners' Adjusted Equity Interest	19.50%
Estimated Redemption Value	$ 560	$ 512	$ 389	$ 449
Redeemable Noncontrolling Interest, Carrying Value	$ 287

Forcepoint Joint Venture (Redee

Forcepoint Joint Venture (Redeemable Noncontrolling Interest Rollforward) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017
Noncontrolling Interest [Line Items]
Beginning balance	$ 512,000,000	$ 449,000,000
Net income (loss)	(22,000,000)	(17,000,000)
Other comprehensive income (loss), net of tax(1)	0	0
Contribution from noncontrolling interest	0	8,000,000
Adjustment of noncontrolling interest to redemption value	70,000,000	(51,000,000)
Ending balance	560,000,000	389,000,000
Maximum [Member]
Noncontrolling Interest [Line Items]
Other comprehensive income (loss), net of tax(1)	$ (1,000,000)	$ 1,000,000

Stockholders' Equity (Narrative

Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended		36 Months Ended
	Mar. 31, 2018	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2020	Nov. 30, 2017
Stockholders' Equity
Stock repurchase program, outstanding common stock available		$ 1,900		$ 1,900
Increase in annual dividend payout rate	8.80%
Dividends declared per share		$ 0.8675	$ 0.7975	$ 2.6025	$ 2.3925		$ 3.19
Amortization of net actuarial loss included in net income		$ 328	$ 327	$ 1,021	$ 890
Cash Flow Hedge Loss to be Reclassified into earnings within Twelve Months		1		1
Forcepoint
Stockholders' Equity
Expense (income) attributable to vesting conditions		$ 4	$ 3	$ 8	4
Shares authorized under stock plans		174		174
Restricted Stock [Member]
Stockholders' Equity
Units granted in period				800
Weighted Average Grant Date Fair Value				$ 213.11
Long-Term Performance Plan [Member]
Stockholders' Equity
Units granted in period				100
Weighted Average Grant Date Fair Value				$ 205.76
Scenario, Forecast [Member]
Stockholders' Equity
Dividends declared per share						$ 3.47
Scenario, Forecast [Member] | Long-Term Performance Plan [Member]
Stockholders' Equity
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] | Upper Limit | Long-Term Performance Plan [Member]
Stockholders' Equity
Target award								200.00%
Scenario, Forecast [Member] | Lower Limit | Long-Term Performance Plan [Member]
Stockholders' Equity
Target award								0.00%
November Two Thousand Seventeen Board of Directors Authorization [Member]
Stockholders' Equity
Stock repurchase program, authorized amount									$ 2,000
Pension Plan [Member]
Stockholders' Equity
Amortization of net actuarial loss included in net income				$ 1,013	$ 883

Stockholders' Equity (Changes i

Stockholders' Equity (Changes in Shares of Common Stock Outstanding) (Details) - shares shares in Millions	9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017
Common Stock Outstanding [Roll Forward]
Beginning balance	288.4	292.8
Stock plans activity	1	1.1
Share repurchases	(4.9)	(4.9)
Ending balance	284.5	289

Stockholders' Equity (Repurchas

Stockholders' Equity (Repurchases of Common Stock) (Details) - USD ($) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017
Stockholders' Equity
Total shares repurchased	$ 1,016	$ 784
Total shares repurchased	4.9	4.9
Share Repurchase Program [Member]
Stockholders' Equity
Total shares repurchased	$ 925	$ 700
Total shares repurchased	4.5	4.4
Satisfy tax withholding [Member]
Stockholders' Equity
Total shares repurchased	$ 91	$ 84
Total shares repurchased	0.4	0.5

Stockholders' Equity (Accumulat

Stockholders' Equity (Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Dec. 31, 2017
Stockholders' Equity
Accumulated Other Comprehensive Income (Loss), Pension and PRB plans, net, beginning balance			$ (7,843,000,000)	$ (7,234,000,000)
Pension and PRB plans, net, Before tax amount	$ 570,000,000	$ (169,000,000)	1,266,000,000	396,000,000
Pension and PRB plans, net, Tax (expense) or benefit			(266,000,000)	(138,000,000)
Pension and PRB plans, net, Net of tax amount	(37,000,000)	(324,000,000)	1,000,000,000	258,000,000
Pension and PRB plan, 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	(8,295,000,000)	(6,976,000,000)	(8,295,000,000)	(6,976,000,000)
Accumulated Other Comprehensive Income (Loss), Foreign exchange translation, beginning balance			(95,000,000)	(175,000,000)
Foreign exchange translation, Before tax amount	0	27,000,000	(19,000,000)	71,000,000
Foreign exchange translation, Tax (expense) or benefit			0	0
Foreign exchange translation, Net of tax amount			(19,000,000)	71,000,000
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	(114,000,000)	(104,000,000)	(114,000,000)	(104,000,000)
Accumulated Other Comprehensive Income (Loss), Cash flow hedges, beginning balance			6,000,000	0
Cash flow hedges, Before tax amount	0	3,000,000	(10,000,000)	11,000,000
Cash flow hedges, Tax (expense) or benefit			2,000,000	(4,000,000)
Cash flow hedges, Net of tax amount			(8,000,000)	7,000,000
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	(1,000,000)	7,000,000	(1,000,000)	7,000,000
Accumulated Other Comprehensive Income (Loss), Unrealized gains (losses) on investments, and other, net, beginning balance			(3,000,000)	(2,000,000)
Unrealized gains (losses) on investments and other, net, Before tax amount	0	0	0	0
Unrealized gains (losses) on investments and other, net, Tax (expense) or benefit			0	0
Unrealized gains (losses) on investments and other, net, Net of tax amount			0	0
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	(3,000,000)	(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)
Other comprehensive income (loss), before tax amount	570,000,000	(139,000,000)	1,237,000,000	478,000,000
Other comprehensive income (Loss), tax (expense) or benefit	(120,000,000)	58,000,000	(264,000,000)	(142,000,000)
Other comprehensive income (loss), net of tax	450,000,000	(81,000,000)	973,000,000	336,000,000
Reclassification of stranded tax effects	0	0	(1,451,000,000)	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, ending balance	(8,413,000,000)	$ (7,075,000,000)	(8,413,000,000)	$ (7,075,000,000)
Pension and PRB plans tax benefit (expense)	2,205,000,000		2,205,000,000		$ 3,923,000,000
Cash flow hedges tax benefit (expense)	0		0		(3,000,000)
Unrealized gains (losses) on investments and other, net tax benefit (expense)	$ (1,000,000)		$ (1,000,000)		$ (1,000,000)

Pension and Other Employee Be_3

Pension and Other Employee Benefits (Narrative) (Details) number in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018USD ($)	Jul. 01, 2018USD ($)	Oct. 01, 2017USD ($)	Sep. 30, 2018USD ($)	Oct. 01, 2017USD ($)	Jul. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Pension and Other Postretirement Benefit [Line Items]
Discretionary pension contributions	$ 1,250,000,000			$ 1,250,000,000	$ 0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ 95,000,000
Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	288,000,000
Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement, Net of Tax	228,000,000
Increase (Decrease) in Obligation, Pension Benefits	40,000,000		$ 492,000,000
Increase (Decrease) in Obligation, Other Postretirement Benefits	7,000,000		5,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	37,000,000		324,000,000	(1,000,000,000)	(258,000,000)
Fair Value, Inputs, Level 1 [Member]
Pension and Other Postretirement Benefit [Line Items]
Marketable securities held in trust	665,000,000			665,000,000			$ 633,000,000
Foreign Plan [Member]
Pension and Other Postretirement Benefit [Line Items]
Net periodic pension expense (income)	(2,000,000)			(6,000,000)	1,000,000
Maximum [Member] | Foreign Plan [Member]
Pension and Other Postretirement Benefit [Line Items]
Net periodic pension expense (income)			1,000,000
Nonqualified Plan, Defined Contribution [Member]
Pension and Other Postretirement Benefit [Line Items]
Liabilities related to nonqualified defined contribution plan	441,000,000			441,000,000			422,000,000
Nonqualified Plan, Defined Contribution [Member] | Fair Value, Inputs, Level 1 [Member]
Pension and Other Postretirement Benefit [Line Items]
Marketable securities held in trust	429,000,000			429,000,000			$ 410,000,000
PRB Plan [Member]
Pension and Other Postretirement Benefit [Line Items]
Net periodic pension expense (income)	$ 6,000,000		$ 7,000,000	$ 16,000,000	$ 18,000,000
Certain pension plans included as part of group annuity contract transfer [Member]
Pension and Other Postretirement Benefit [Line Items]
Benefit Obligation Transferred						$ 923,000,000
Group Annuity Contract, Number of U.S. Retirees and Beneficiaries						13

Pension and Other Employee Be_4

Pension and Other Employee Benefits (Schedule of Marketable Securities) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Inputs, Level 1 [Member]
Marketable Securities [Line Items]
Marketable securities held in trust	$ 665	$ 633

Pension and Other Employee Be_5

Pension and Other Employee Benefits (Schedule of Components of Net Periodic Benefit Cost) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Non-operating expense
Total pension non-service expense	$ 516,000,000	$ 270,000,000	$ 993,000,000	$ 683,000,000
Pension Plan [Member]
Operating expense
Service cost	123,000,000	122,000,000	378,000,000	355,000,000
Non-operating expense
Interest cost	248,000,000	281,000,000	753,000,000	815,000,000
Expected return on plan assets	(351,000,000)	(342,000,000)	(1,077,000,000)	(1,032,000,000)
Amortization of prior service cost included in net periodic pension expense	1,000,000	2,000,000	4,000,000	4,000,000
Recognized net actuarial loss	325,000,000	324,000,000	1,013,000,000	883,000,000
Loss due to settlements	288,000,000	0	288,000,000	0
Total pension non-service expense	511,000,000	265,000,000	981,000,000	670,000,000
Net periodic pension expense (income)	$ 634,000,000	$ 387,000,000	$ 1,359,000,000	$ 1,025,000,000

Pension and Other Employee Be_6

Pension and Other Employee Benefits (Schedule of Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table [Line Items]
Defined Benefit Plan, Long-term Liabilities	$ 5,865	$ 7,883
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table [Line Items]
Defined Benefit Plan, Long-term Liabilities	5,496	7,515
PRB Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table [Line Items]
Defined Benefit Plan, Long-term Liabilities	$ 369	$ 368

Pension and Other Employee Be_7

Pension and Other Employee Benefits (Schedule of Contributions) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Oct. 01, 2017
Payment for Pension and Other Postretirement Benefits [Abstract]
Required pension contributions		$ 857,000,000	$ 574,000,000
Discretionary pension contributions	$ 1,250,000,000	1,250,000,000	0
PRB contributions		15,000,000	17,000,000
Total pension and PRB contributions		$ 2,122,000,000	$ 591,000,000

Income Taxes Income Taxes (Narr

Income Taxes Income Taxes (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Sep. 30, 2018	Jul. 01, 2018	Sep. 30, 2018
Income Taxes [Line Items]
Income Tax Examination, Estimate of Possible Loss	$ 41			$ 32
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount		$ 110
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent		17.30%		5.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount			$ 95
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent				4.30%
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)				$ 11
Unrecognized Tax Benefits	$ 9	$ 84		$ 84

Business Segment Reporting (Seg

Business Segment Reporting (Segment Results) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Segment Reporting Information [Line Items]
Sales, Net	$ 6,806,000,000	$ 6,284,000,000	$ 19,698,000,000	$ 18,565,000,000
Operating income	1,183,000,000	1,128,000,000	3,324,000,000	3,131,000,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, Net	6,808,000,000	6,291,000,000	19,708,000,000	18,593,000,000
Operating income	843,000,000	819,000,000	2,369,000,000	2,306,000,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, Net	(377,000,000)	(355,000,000)	(1,110,000,000)	(1,077,000,000)
Operating income	(45,000,000)	(39,000,000)	(126,000,000)	(113,000,000)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, Net	(379,000,000)	(362,000,000)	(1,120,000,000)	(1,105,000,000)
Corporate [Member]
Segment Reporting Information [Line Items]
Sales, Net	0	0	0	0
Operating income	5,000,000	0	(20,000,000)	(30,000,000)
Integrated Defense Systems
Segment Reporting Information [Line Items]
Sales, Net	1,476,000,000	1,378,000,000	4,449,000,000	4,206,000,000
Integrated Defense Systems | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, Net	1,493,000,000	1,391,000,000	4,496,000,000	4,251,000,000
Operating income	241,000,000	231,000,000	776,000,000	688,000,000
Integrated Defense Systems | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, Net	(17,000,000)	(13,000,000)	(47,000,000)	(45,000,000)
Operating income	(2,000,000)	(1,000,000)	(5,000,000)	(3,000,000)
Integrated Defense Systems | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, Net	0	0	0	0
Intelligence, Information and Services
Segment Reporting Information [Line Items]
Sales, Net	1,580,000,000	1,384,000,000	4,520,000,000	4,096,000,000
Intelligence, Information and Services | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, Net	1,742,000,000	1,543,000,000	5,011,000,000	4,605,000,000
Operating income	149,000,000	112,000,000	394,000,000	338,000,000
Intelligence, Information and Services | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, Net	(162,000,000)	(159,000,000)	(491,000,000)	(509,000,000)
Operating income	(17,000,000)	(15,000,000)	(51,000,000)	(49,000,000)
Intelligence, Information and Services | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, Net	0	0	0	0
Missile Systems
Segment Reporting Information [Line Items]
Sales, Net	2,042,000,000	1,909,000,000	5,864,000,000	5,501,000,000
Missile Systems | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, Net	2,082,000,000	1,945,000,000	5,981,000,000	5,602,000,000
Operating income	257,000,000	280,000,000	700,000,000	732,000,000
Missile Systems | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, Net	(40,000,000)	(36,000,000)	(117,000,000)	(101,000,000)
Operating income	(4,000,000)	(4,000,000)	(11,000,000)	(10,000,000)
Missile Systems | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, Net	0	0	0	0
Space and Airborne Systems
Segment Reporting Information [Line Items]
Sales, Net	1,546,000,000	1,457,000,000	4,432,000,000	4,354,000,000
Space and Airborne Systems | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, Net	1,695,000,000	1,597,000,000	4,868,000,000	4,760,000,000
Operating income	223,000,000	212,000,000	622,000,000	620,000,000
Space and Airborne Systems | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, Net	(149,000,000)	(140,000,000)	(436,000,000)	(406,000,000)
Operating income	(15,000,000)	(14,000,000)	(44,000,000)	(40,000,000)
Space and Airborne Systems | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, Net	0	0	0	0
Forcepoint
Segment Reporting Information [Line Items]
Sales, Net	162,000,000	156,000,000	433,000,000	408,000,000
Forcepoint | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales, Net	173,000,000	170,000,000	462,000,000	452,000,000
Operating income	18,000,000	23,000,000	3,000,000	41,000,000
Forcepoint | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales, Net	(9,000,000)	(7,000,000)	(19,000,000)	(16,000,000)
Operating income	(7,000,000)	(5,000,000)	(15,000,000)	(11,000,000)
Forcepoint | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, Net	(2,000,000)	(7,000,000)	(10,000,000)	(28,000,000)
Acquisition Accounting Adjustments
Segment Reporting Information [Line Items]
Sales, Net	0	0	0	0
Acquisition Accounting Adjustments | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Sales, Net	(2,000,000)	(7,000,000)	(10,000,000)	(28,000,000)
Operating income	(30,000,000)	(39,000,000)	(97,000,000)	(123,000,000)
FAS CAS Operating Adjustment [Member] | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating income	$ 365,000,000	$ 348,000,000	$ 1,072,000,000	$ 978,000,000

Business Segment Reporting (Com

Business Segment Reporting (Components of FAS/CAS Operating Adjustment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Segment Reporting Information [Line Items]
Operating income	$ 1,183	$ 1,128	$ 3,324	$ 3,131
FAS CAS Operating Adjustment [Member] | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating income	365	348	1,072	978
FAS/CAS Pension Operating Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	361	346	1,062	969
FAS/CAS PRB Operating Adjustment [Member]
Segment Reporting Information [Line Items]
Operating income	$ 4	$ 2	$ 10	$ 9

Business Segment Reporting (Tot

Business Segment Reporting (Total Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 30,134	$ 30,860
Operating Segments [Member] | Integrated Defense Systems
Segment Reporting Information [Line Items]
Total assets	4,956	4,679
Operating Segments [Member] | Intelligence, Information and Services
Segment Reporting Information [Line Items]
Total assets	4,298	4,230
Operating Segments [Member] | Missile Systems
Segment Reporting Information [Line Items]
Total assets	7,960	7,338
Operating Segments [Member] | Space and Airborne Systems
Segment Reporting Information [Line Items]
Total assets	6,741	6,696
Operating Segments [Member] | Forcepoint
Segment Reporting Information [Line Items]
Total assets	2,494	2,543
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets	$ 3,685	$ 5,374

Business Segment Reporting (Dis

Business Segment Reporting (Disaggregation of Revenue) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 6,806,000,000	$ 6,284,000,000	$ 19,698,000,000	$ 18,565,000,000
Corporate [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	6,808,000,000	6,291,000,000	19,708,000,000	18,593,000,000
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(377,000,000)	(355,000,000)	(1,110,000,000)	(1,077,000,000)
Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Net sales	(379,000,000)	(362,000,000)	(1,120,000,000)	(1,105,000,000)
Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,798,000,000	3,700,000,000	10,874,000,000	10,676,000,000
Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,008,000,000	2,584,000,000	8,824,000,000	7,889,000,000
US Government Sales Excluding Foreign Military Sales [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,718,000,000	4,190,000,000	13,409,000,000	12,367,000,000
U.S. Direct Commercial Sales and Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	124,000,000	95,000,000	375,000,000	283,000,000
Foreign Military Sales through U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Net sales	868,000,000	787,000,000	2,497,000,000	2,390,000,000
Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,096,000,000	1,212,000,000	3,417,000,000	3,525,000,000
United States [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,842,000,000	4,285,000,000	13,784,000,000	12,650,000,000
United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,897,000,000	1,794,000,000	5,174,000,000	5,065,000,000
United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	2,821,000,000	2,396,000,000	8,235,000,000	7,302,000,000
United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	119,000,000	93,000,000	359,000,000	275,000,000
United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	5,000,000	2,000,000	16,000,000	8,000,000
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net sales	676,000,000	656,000,000	1,971,000,000	1,952,000,000
Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	263,000,000	216,000,000	718,000,000	617,000,000
Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	48,000,000	63,000,000	167,000,000	201,000,000
Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	341,000,000	346,000,000	992,000,000	1,021,000,000
Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	24,000,000	31,000,000	94,000,000	113,000,000
Middle East And North Africa [Member]
Disaggregation of Revenue [Line Items]
Net sales	954,000,000	1,026,000,000	2,967,000,000	3,015,000,000
Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	370,000,000	384,000,000	1,142,000,000	1,210,000,000
Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	68,000,000	55,000,000	184,000,000	151,000,000
Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	516,000,000	587,000,000	1,641,000,000	1,654,000,000
Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
All Other Principally Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	334,000,000	317,000,000	976,000,000	948,000,000
All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	94,000,000	42,000,000	200,000,000	129,000,000
All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	25,000,000	27,000,000	86,000,000	82,000,000
All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	198,000,000	238,000,000	648,000,000	705,000,000
All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	17,000,000	10,000,000	42,000,000	32,000,000
Integrated Defense Systems
Disaggregation of Revenue [Line Items]
Net sales	1,476,000,000	1,378,000,000	4,449,000,000	4,206,000,000
Integrated Defense Systems | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,493,000,000	1,391,000,000	4,496,000,000	4,251,000,000
Integrated Defense Systems | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(17,000,000)	(13,000,000)	(47,000,000)	(45,000,000)
Integrated Defense Systems | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Integrated Defense Systems | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	947,000,000	903,000,000	2,900,000,000	2,723,000,000
Integrated Defense Systems | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	529,000,000	475,000,000	1,549,000,000	1,483,000,000
Integrated Defense Systems | US Government Sales Excluding Foreign Military Sales [Member]
Disaggregation of Revenue [Line Items]
Net sales	605,000,000	531,000,000	1,843,000,000	1,690,000,000
Integrated Defense Systems | U.S. Direct Commercial Sales and Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,000,000	3,000,000	6,000,000	7,000,000
Integrated Defense Systems | Foreign Military Sales through U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Net sales	355,000,000	381,000,000	1,029,000,000	1,156,000,000
Integrated Defense Systems | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Net sales	515,000,000	463,000,000	1,571,000,000	1,353,000,000
Integrated Defense Systems | United States [Member]
Disaggregation of Revenue [Line Items]
Net sales	606,000,000	534,000,000	1,849,000,000	1,697,000,000
Integrated Defense Systems | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	176,000,000	165,000,000	601,000,000	567,000,000
Integrated Defense Systems | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	429,000,000	366,000,000	1,242,000,000	1,123,000,000
Integrated Defense Systems | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,000,000	3,000,000	5,000,000	6,000,000
Integrated Defense Systems | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	1,000,000	1,000,000
Integrated Defense Systems | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net sales	271,000,000	250,000,000	799,000,000	787,000,000
Integrated Defense Systems | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,000,000	47,000,000	124,000,000	131,000,000
Integrated Defense Systems | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	19,000,000	32,000,000	66,000,000	104,000,000
Integrated Defense Systems | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	182,000,000	140,000,000	516,000,000	440,000,000
Integrated Defense Systems | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	24,000,000	31,000,000	93,000,000	112,000,000
Integrated Defense Systems | Middle East And North Africa [Member]
Disaggregation of Revenue [Line Items]
Net sales	514,000,000	541,000,000	1,597,000,000	1,603,000,000
Integrated Defense Systems | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	190,000,000	257,000,000	628,000,000	785,000,000
Integrated Defense Systems | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	47,000,000	39,000,000	117,000,000	117,000,000
Integrated Defense Systems | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	277,000,000	245,000,000	852,000,000	701,000,000
Integrated Defense Systems | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Integrated Defense Systems | All Other Principally Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	85,000,000	53,000,000	204,000,000	119,000,000
Integrated Defense Systems | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,000,000	1,000,000	72,000,000	3,000,000
Integrated Defense Systems | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	7,000,000	5,000,000	22,000,000	16,000,000
Integrated Defense Systems | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	29,000,000	45,000,000	102,000,000	90,000,000
Integrated Defense Systems | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,000,000	2,000,000	8,000,000	10,000,000
Intelligence, Information and Services
Disaggregation of Revenue [Line Items]
Net sales	1,580,000,000	1,384,000,000	4,520,000,000	4,096,000,000
Intelligence, Information and Services | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,742,000,000	1,543,000,000	5,011,000,000	4,605,000,000
Intelligence, Information and Services | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(162,000,000)	(159,000,000)	(491,000,000)	(509,000,000)
Intelligence, Information and Services | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Intelligence, Information and Services | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	476,000,000	462,000,000	1,363,000,000	1,354,000,000
Intelligence, Information and Services | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,104,000,000	922,000,000	3,157,000,000	2,742,000,000
Intelligence, Information and Services | US Government Sales Excluding Foreign Military Sales [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,336,000,000	1,181,000,000	3,836,000,000	3,474,000,000
Intelligence, Information and Services | U.S. Direct Commercial Sales and Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	35,000,000	33,000,000	100,000,000	107,000,000
Intelligence, Information and Services | Foreign Military Sales through U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Net sales	89,000,000	59,000,000	229,000,000	190,000,000
Intelligence, Information and Services | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Net sales	120,000,000	111,000,000	355,000,000	325,000,000
Intelligence, Information and Services | United States [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,371,000,000	1,214,000,000	3,936,000,000	3,581,000,000
Intelligence, Information and Services | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	260,000,000	278,000,000	762,000,000	798,000,000
Intelligence, Information and Services | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,076,000,000	903,000,000	3,074,000,000	2,676,000,000
Intelligence, Information and Services | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	31,000,000	32,000,000	87,000,000	102,000,000
Intelligence, Information and Services | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,000,000	1,000,000	13,000,000	5,000,000
Intelligence, Information and Services | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net sales	132,000,000	104,000,000	357,000,000	307,000,000
Intelligence, Information and Services | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	71,000,000	43,000,000	173,000,000	131,000,000
Intelligence, Information and Services | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	11,000,000	11,000,000	37,000,000	40,000,000
Intelligence, Information and Services | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	50,000,000	50,000,000	147,000,000	136,000,000
Intelligence, Information and Services | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Intelligence, Information and Services | Middle East And North Africa [Member]
Disaggregation of Revenue [Line Items]
Net sales	6,000,000	10,000,000	27,000,000	33,000,000
Intelligence, Information and Services | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	5,000,000	5,000,000	16,000,000	14,000,000
Intelligence, Information and Services | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	1,000,000	1,000,000
Intelligence, Information and Services | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,000,000	5,000,000	10,000,000	18,000,000
Intelligence, Information and Services | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Intelligence, Information and Services | All Other Principally Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	71,000,000	56,000,000	200,000,000	175,000,000
Intelligence, Information and Services | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	2,000,000	0	2,000,000	3,000,000
Intelligence, Information and Services | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	1,000,000
Intelligence, Information and Services | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	56,000,000	49,000,000	166,000,000	152,000,000
Intelligence, Information and Services | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	13,000,000	7,000,000	32,000,000	19,000,000
Missile Systems
Disaggregation of Revenue [Line Items]
Net sales	2,042,000,000	1,909,000,000	5,864,000,000	5,501,000,000
Missile Systems | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	2,082,000,000	1,945,000,000	5,981,000,000	5,602,000,000
Missile Systems | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(40,000,000)	(36,000,000)	(117,000,000)	(101,000,000)
Missile Systems | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Missile Systems | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,342,000,000	1,381,000,000	3,752,000,000	3,895,000,000
Missile Systems | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	700,000,000	528,000,000	2,112,000,000	1,606,000,000
Missile Systems | US Government Sales Excluding Foreign Military Sales [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,472,000,000	1,229,000,000	4,021,000,000	3,479,000,000
Missile Systems | U.S. Direct Commercial Sales and Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	6,000,000	0	29,000,000	1,000,000
Missile Systems | Foreign Military Sales through U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Net sales	272,000,000	242,000,000	841,000,000	769,000,000
Missile Systems | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Net sales	292,000,000	438,000,000	973,000,000	1,252,000,000
Missile Systems | United States [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,478,000,000	1,229,000,000	4,050,000,000	3,480,000,000
Missile Systems | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	804,000,000	744,000,000	2,039,000,000	2,004,000,000
Missile Systems | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	668,000,000	485,000,000	1,982,000,000	1,475,000,000
Missile Systems | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	6,000,000	0	29,000,000	1,000,000
Missile Systems | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Missile Systems | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net sales	150,000,000	191,000,000	486,000,000	538,000,000
Missile Systems | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	105,000,000	98,000,000	314,000,000	285,000,000
Missile Systems | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	11,000,000	15,000,000	50,000,000	49,000,000
Missile Systems | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	34,000,000	78,000,000	121,000,000	203,000,000
Missile Systems | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	1,000,000	1,000,000
Missile Systems | Middle East And North Africa [Member]
Disaggregation of Revenue [Line Items]
Net sales	318,000,000	362,000,000	1,007,000,000	1,063,000,000
Missile Systems | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	105,000,000	75,000,000	311,000,000	268,000,000
Missile Systems | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,000,000	6,000,000	17,000,000	17,000,000
Missile Systems | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	209,000,000	281,000,000	679,000,000	778,000,000
Missile Systems | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Missile Systems | All Other Principally Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	96,000,000	127,000,000	321,000,000	420,000,000
Missile Systems | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	31,000,000	27,000,000	89,000,000	89,000,000
Missile Systems | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	16,000,000	21,000,000	60,000,000	61,000,000
Missile Systems | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	48,000,000	78,000,000	170,000,000	267,000,000
Missile Systems | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,000,000	1,000,000	2,000,000	3,000,000
Space and Airborne Systems
Disaggregation of Revenue [Line Items]
Net sales	1,546,000,000	1,457,000,000	4,432,000,000	4,354,000,000
Space and Airborne Systems | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,695,000,000	1,597,000,000	4,868,000,000	4,760,000,000
Space and Airborne Systems | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(149,000,000)	(140,000,000)	(436,000,000)	(406,000,000)
Space and Airborne Systems | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Space and Airborne Systems | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	875,000,000	802,000,000	2,437,000,000	2,306,000,000
Space and Airborne Systems | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	671,000,000	655,000,000	1,995,000,000	2,048,000,000
Space and Airborne Systems | US Government Sales Excluding Foreign Military Sales [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,255,000,000	1,200,000,000	3,611,000,000	3,623,000,000
Space and Airborne Systems | U.S. Direct Commercial Sales and Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	30,000,000	8,000,000	88,000,000	21,000,000
Space and Airborne Systems | Foreign Military Sales through U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Net sales	152,000,000	105,000,000	398,000,000	275,000,000
Space and Airborne Systems | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Net sales	109,000,000	144,000,000	335,000,000	435,000,000
Space and Airborne Systems | United States [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,285,000,000	1,208,000,000	3,699,000,000	3,644,000,000
Space and Airborne Systems | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	611,000,000	562,000,000	1,685,000,000	1,605,000,000
Space and Airborne Systems | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	644,000,000	638,000,000	1,926,000,000	2,018,000,000
Space and Airborne Systems | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	29,000,000	7,000,000	86,000,000	19,000,000
Space and Airborne Systems | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,000,000	1,000,000	2,000,000	2,000,000
Space and Airborne Systems | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net sales	106,000,000	97,000,000	280,000,000	280,000,000
Space and Airborne Systems | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	41,000,000	28,000,000	107,000,000	70,000,000
Space and Airborne Systems | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	7,000,000	5,000,000	14,000,000	8,000,000
Space and Airborne Systems | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	58,000,000	64,000,000	159,000,000	202,000,000
Space and Airborne Systems | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Space and Airborne Systems | Middle East And North Africa [Member]
Disaggregation of Revenue [Line Items]
Net sales	109,000,000	107,000,000	314,000,000	299,000,000
Space and Airborne Systems | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	70,000,000	47,000,000	187,000,000	143,000,000
Space and Airborne Systems | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	17,000,000	10,000,000	49,000,000	16,000,000
Space and Airborne Systems | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	22,000,000	50,000,000	78,000,000	140,000,000
Space and Airborne Systems | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Space and Airborne Systems | All Other Principally Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,000,000	45,000,000	139,000,000	131,000,000
Space and Airborne Systems | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	15,000,000	14,000,000	37,000,000	34,000,000
Space and Airborne Systems | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	2,000,000	1,000,000	4,000,000	4,000,000
Space and Airborne Systems | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	29,000,000	30,000,000	98,000,000	93,000,000
Space and Airborne Systems | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint
Disaggregation of Revenue [Line Items]
Net sales	162,000,000	156,000,000	433,000,000	408,000,000
Forcepoint | Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	173,000,000	170,000,000	462,000,000	452,000,000
Forcepoint | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(9,000,000)	(7,000,000)	(19,000,000)	(16,000,000)
Forcepoint | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Net sales	(2,000,000)	(7,000,000)	(10,000,000)	(28,000,000)
Forcepoint | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	158,000,000	152,000,000	422,000,000	398,000,000
Forcepoint | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,000,000	4,000,000	11,000,000	10,000,000
Forcepoint | US Government Sales Excluding Foreign Military Sales [Member]
Disaggregation of Revenue [Line Items]
Net sales	50,000,000	49,000,000	98,000,000	101,000,000
Forcepoint | U.S. Direct Commercial Sales and Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	52,000,000	51,000,000	152,000,000	147,000,000
Forcepoint | Foreign Military Sales through U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member]
Disaggregation of Revenue [Line Items]
Net sales	60,000,000	56,000,000	183,000,000	160,000,000
Forcepoint | United States [Member]
Disaggregation of Revenue [Line Items]
Net sales	102,000,000	100,000,000	250,000,000	248,000,000
Forcepoint | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	46,000,000	45,000,000	87,000,000	91,000,000
Forcepoint | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,000,000	4,000,000	11,000,000	10,000,000
Forcepoint | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	52,000,000	51,000,000	152,000,000	147,000,000
Forcepoint | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net sales	17,000,000	14,000,000	49,000,000	40,000,000
Forcepoint | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	17,000,000	14,000,000	49,000,000	40,000,000
Forcepoint | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | Middle East And North Africa [Member]
Disaggregation of Revenue [Line Items]
Net sales	7,000,000	6,000,000	22,000,000	17,000,000
Forcepoint | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	7,000,000	6,000,000	22,000,000	17,000,000
Forcepoint | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | All Other Principally Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	36,000,000	36,000,000	112,000,000	103,000,000
Forcepoint | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Forcepoint | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	36,000,000	36,000,000	112,000,000	103,000,000
Forcepoint | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Acquisition Accounting Adjustments
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Acquisition Accounting Adjustments | Segment Reconciling Items [Member]
Disaggregation of Revenue [Line Items]
Net sales	(2,000,000)	(7,000,000)	(10,000,000)	(28,000,000)
Operating Segments [Member] | Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | United States [Member] | US Government Sales Excluding Foreign Military Sales [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | United States [Member] | U.S. Direct Commercial Sales and Other [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Asia Pacific [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Asia Pacific [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Middle East And North Africa [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | Middle East And North Africa [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | All Other Principally Europe [Member] | Foreign Military Sales through U.S. Government [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Fixed-price [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Corporate [Member] | All Other Principally Europe [Member] | Foreign direct commercial sales, excluding Foreign Military Sales through U.S. Gov [Member] | Cost-type [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0

Remaining Performance Obligat_2

Remaining Performance Obligations (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)
Remaining Performance Obligations [Line Items]
Remaining Performance Obligation	$ 41,599
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.
SAUDI ARABIA
Remaining Performance Obligations [Line Items]
Remaining Performance Obligation	$ 2,300
Kingdom of Saudi Arabia net sales, as a percent of total net sales	5.00%