General Dynamics (GD) 10-Q 28 Oct 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page	9 Months Ended
	Sep. 27, 2020shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 27, 2020
Document Transition Report	false
Entity File Number	1-3671
Entity Registrant Name	GENERAL DYNAMICS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-1673581
Entity Address, Address Line One	11011 Sunset Hills Road
Entity Address, City or Town	Reston,
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	20190
City Area Code	703
Local Phone Number	876-3000
Title of 12(b) Security	Common Stock
Trading Symbol	GD
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	286,972,150
Entity Central Index Key	0000040533
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false

Consolidated Statement of Earni

Consolidated Statement of Earnings (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Revenue:
Revenue	$ 9,431	$ 9,761	$ 27,444	$ 28,577
Operating costs and expenses:
General and administrative (G&A)	(511)	(572)	(1,609)	(1,782)
Operating costs and expenses, total	(8,347)	(8,545)	(24,578)	(25,257)
Operating earnings	1,084	1,216	2,866	3,320
Other, net	12	(12)	44	18
Interest, net	(118)	(114)	(357)	(350)
Earnings before income tax	978	1,090	2,553	2,988
Provision for income tax, net	(144)	(177)	(388)	(524)
Net earnings	$ 834	$ 913	$ 2,165	$ 2,464
Earnings per share
Basic (in dollars per share)	$ 2.91	$ 3.17	$ 7.54	$ 8.55
Diluted (in dollars per share)	$ 2.90	$ 3.14	$ 7.52	$ 8.47
Products
Revenue:
Revenue	$ 5,454	$ 5,789	$ 15,849	$ 16,441
Operating costs and expenses:
Cost of sales	(4,452)	(4,640)	(13,038)	(13,217)
Services
Revenue:
Revenue	3,977	3,972	11,595	12,136
Operating costs and expenses:
Cost of sales	$ (3,384)	$ (3,333)	$ (9,931)	$ (10,258)

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 834	$ 913	$ 2,165	$ 2,464
Gains on cash flow hedges	110	2	181	70
Foreign currency translation adjustments	139	(108)	60	48
Change in retirement plans’ funded status	66	66	218	188
Other comprehensive income (loss), pretax	315	(40)	459	306
Provision for income tax, net	(43)	(15)	(95)	(59)
Other comprehensive income (loss), net of tax	272	(55)	364	247
Comprehensive income	$ 1,106	$ 858	$ 2,529	$ 2,711

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions		Sep. 27, 2020	Dec. 31, 2019
Current assets:
Cash and equivalents		$ 1,469	$ 902
Accounts receivable		3,863	3,544
Unbilled receivables		8,143	7,857
Inventories		6,402	6,306
Other current assets		988	1,171
Total current assets		20,865	19,780
Noncurrent assets:
Property, plant and equipment, net		4,863	4,475
Intangible assets, net		2,162	2,315
Goodwill	[1]	19,889	19,677
Other assets		2,479	2,594
Total noncurrent assets		29,393	29,061
Total assets		50,258	48,841
Current liabilities:
Short-term debt and current portion of long-term debt		3,394	2,920
Accounts payable		2,613	3,162
Customer advances and deposits		6,086	7,148
Other current liabilities		4,027	3,571
Total current liabilities		16,120	16,801
Noncurrent liabilities:
Long-term debt		9,978	9,010
Other liabilities		9,444	9,453
Commitments and contingencies
Total noncurrent liabilities		19,422	18,463
Shareholders’ equity:
Common stock		482	482
Surplus		3,082	3,039
Retained earnings		32,812	31,633
Treasury stock		(17,805)	(17,358)
Accumulated other comprehensive loss		(3,855)	(4,219)
Total shareholders’ equity		14,716	13,577
Total liabilities and shareholders’ equity		$ 50,258	$ 48,841
[1]	Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively.

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019
Cash flows from operating activities - continuing operations:
Net earnings	$ 2,165	$ 2,464
Adjustments to reconcile net earnings to net cash from operating activities:
Depreciation of property, plant and equipment	376	352
Amortization of intangible and finance lease right-of-use assets	267	273
Equity-based compensation expense	91	103
Deferred income tax benefit	(112)	(72)
(Increase) decrease in assets, net of effects of business acquisitions:
Accounts receivable	(336)	253
Unbilled receivables	(239)	(1,603)
Inventories	(134)	(646)
Increase (decrease) in liabilities, net of effects of business acquisitions:
Accounts payable	(558)	(164)
Customer advances and deposits	(906)	(565)
Increase (Decrease) in Other Current Liabilities	360	191
Other, net	322	1
Net cash provided by operating activities	1,296	587
Cash flows from investing activities:
Capital expenditures	(622)	(606)
Other, net	33	2
Net cash used by investing activities	(589)	(604)
Cash flows from financing activities:
Proceeds from fixed-rate notes	3,960	0
Repayment of notes	(2,000)	0
Dividends paid	(925)	(858)
Purchases of common stock	(501)	(231)
Proceeds from commercial paper, gross (maturities greater than 3 months)	420	0
Repayment of commercial paper, gross (maturities greater than 3 months)	(420)	0
Proceeds from commercial paper	0	947
Other, net	(134)	207
Net cash (used) provided by financing activities	(100)	65
Net cash used by discontinued operations	(40)	(37)
Net increase in cash and equivalents	567	11
Cash and equivalents at beginning of period	902	963
Cash and equivalents at end of period	1,469	974
Supplemental cash flow information:
Income tax payments, net	(345)	(487)
Interest payments	(261)	(271)
Floating-rate notes
Cash flows from financing activities:
Repayment of notes	$ (500)	$ 0

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock, Par	Common Stock, Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2018	$ 11,732	$ 482	$ 2,946	$ 29,326	$ (17,244)	$ (3,778)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	2,464			2,464
Cash dividends declared	(881)			(881)
Equity-based awards	135		53		82
Shares purchased	(184)				(184)
Other comprehensive income (loss)	247					247
Ending balance at Sep. 29, 2019	13,513	482	2,999	30,909	(17,346)	(3,531)
Beginning balance at Jun. 30, 2019	12,877	482	2,959	30,291	(17,379)	(3,476)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	913			913
Cash dividends declared	(295)			(295)
Equity-based awards	73		40		33
Other comprehensive income (loss)	(55)					(55)
Ending balance at Sep. 29, 2019	13,513	482	2,999	30,909	(17,346)	(3,531)
Beginning balance at Dec. 31, 2019	13,577	482	3,039	31,633	(17,358)	(4,219)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	2,165			2,165
Cash dividends declared	(949)			(949)
Equity-based awards	97		43		54
Shares purchased	(501)				(501)
Other comprehensive income (loss)	364					364
Ending balance at Sep. 27, 2020	14,716	482	3,082	32,812	(17,805)	(3,855)
Beginning balance at Jun. 28, 2020	13,890	482	3,050	32,294	(17,809)	(4,127)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	834			834
Cash dividends declared	(316)			(316)
Equity-based awards	36		32		4
Other comprehensive income (loss)	272					272
Ending balance at Sep. 27, 2020	$ 14,716	$ 482	$ 3,082	$ 32,812	$ (17,805)	$ (3,855)

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 27, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization. General Dynamics is a global aerospace and defense company that offers a broad portfolio of products and services in business aviation; combat vehicles, weapons systems and munitions; information technology (IT) services; command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) solutions; and shipbuilding and ship repair. Basis of Consolidation and Classification. The unaudited Consolidated Financial Statements include the accounts of General Dynamics Corporation and our wholly owned and majority-owned subsidiaries. We eliminate all inter-company balances and transactions in the unaudited Consolidated Financial Statements. Some prior-year amounts have been reclassified among financial statement accounts or disclosures to conform to the current-year presentation. Consistent with industry practice, we classify assets and liabilities related to long-term contracts as current, even though some of these amounts may not be realized within one year. Further discussion of our significant accounting policies is contained in the other notes to these financial statements. Interim Financial Statements. The unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. These rules and regulations permit some of the information and footnote disclosures included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) to be condensed or omitted. Our fiscal quarters are typically 13 weeks in length. Because our fiscal year ends on December 31, the number of days in our first and fourth quarters varies slightly from year to year. Operating results for the three- and nine-month periods ended September 27, 2020 , are not necessarily indicative of the results that may be expected for the year ending December 31, 2020 . The unaudited Consolidated Financial Statements contain all adjustments that are of a normal recurring nature necessary for a fair presentation of our results of operations and financial condition for the three- and nine-month periods ended September 27, 2020 , and September 29, 2019 . These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2019 . Use of Estimates and Other Uncertainties. The Coronavirus (COVID-19) outbreak has caused significant disruptions to national and global economies and government activities. Our businesses have been designated as critical infrastructure by the U.S. government and many non-U.S. governments and, as such, are required to stay open. Within our Aerospace segment, quarantine and travel restrictions in connection with the outbreak have impacted the timing of aircraft deliveries, and the economic consequences of COVID-19 have impacted demand. Our defense business has also experienced disruptions, such as customer site closures, travel restrictions and social distancing requirements, which have impacted contract execution. We have instituted various initiatives throughout the company as part of our business continuity programs, and we continue to work to mitigate risk when disruptions occur. While we expect this situation to be temporary, any longer-term impact to our business is currently unknown due to the uncertainty around the outbreak’s duration and its broader impact. The nature of our business requires that we make estimates and assumptions in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reporting period. The COVID-19 outbreak has impacted these estimates and assumptions and will continue to do so. The accounting for long-term contracts requires the use of estimates (see Note C). Our estimates at the end of the third quarter included impacts from the disruptions caused by COVID-19. Given the uncertainties around the pandemic, including its duration and potential future disruptions to our supply chain or workforce, it is reasonably possible that the actual impact of the pandemic on contract costs could be materially different than our current estimates. The United States and some other governments have taken steps to provide relief. Where our customer has agreed to reimburse certain costs, such as provided for by the Coronavirus Aid, Relief, and Economic Security Act (the CARES Act), we have included those recoveries in our estimates of revenue. To the extent the U.S. government provides for reimbursement of additional costs through legislation and the U.S. Department of Defense (DoD) has available funds, we will seek reimbursement as appropriate. The company is also monitoring for other long-term impacts of the pandemic, such as the impairment of goodwill, intangibles or other long-lived assets. As of the end of the quarter, we have not identified a triggering event requiring an impairment test. Property, Plant and Equipment, Net. Property, plant and equipment (PP&E) is carried at historical cost, net of accumulated depreciation. Net PP&E consisted of the following: September 27, 2020 December 31, 2019 PP&E $ 10,361 $ 9,761 Accumulated depreciation (5,498 ) (5,286 ) PP&E, net $ 4,863 $ 4,475 Accounting Standards Updates. Effective January 1, 2020, we adopted ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 significantly changes how entities account for credit losses for financial assets and certain other instruments, including trade receivables and contract assets, that are not measured at fair value through net income. The ASU requires a number of changes to the assessment of credit losses, including the utilization of an expected credit loss model, which requires consideration of a broader range of information to estimate expected credit losses over the entire lifetime of the asset, including losses where probability is considered remote. Additionally, the standard requires the estimation of lifetime expected losses for trade receivables and contract assets that are classified as current. We adopted the standard on a modified retrospective basis and recognized the cumulative effect as a $37 decrease to retained earnings on the date of adoption. There are other accounting standards that have been issued by the Financial Accounting Standards Board but are not yet effective. These standards are not expected to have a material impact on our results of operations, financial condition or cash flows.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 27, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	GOODWILL AND INTANGIBLE ASSETS Goodwill. The changes in the carrying amount of goodwill by reporting unit were as follows: Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Goodwill December 31, 2019 (a) $ 2,831 $ 2,681 $ 9,700 $ 4,168 $ 297 $ 19,677 Acquisitions (b) 73 49 — — — 122 Other (c) 87 (6 ) — 9 — 90 September 27, 2020 (a) $ 2,991 $ 2,724 $ 9,700 $ 4,177 $ 297 $ 19,889 (a) Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively. (b) Includes businesses acquired in our Aerospace and Combat Systems segments and adjustments during the purchase price allocation period. (c) Consists primarily of adjustments for foreign currency translation. Intangible Assets. Intangible assets consisted of the following: Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount September 27, 2020 December 31, 2019 Contract and program intangible assets (b) $ 3,745 $ (1,891 ) $ 1,854 $ 3,776 $ (1,779 ) $ 1,997 Trade names and trademarks 496 (216 ) 280 474 (195 ) 279 Technology and software 130 (103 ) 27 164 (126 ) 38 Other intangible assets 159 (158 ) 1 159 (158 ) 1 Total intangible assets $ 4,530 $ (2,368 ) $ 2,162 $ 4,573 $ (2,258 ) $ 2,315 (a) Changes in gross carrying amounts consist primarily of adjustments for acquired and divested intangible assets and foreign currency translation. (b) Consists of acquired backlog and probable follow-on work and associated customer relationships. Amortization expense is included in operating costs and expenses in the Consolidated Statement of Earnings. Amortization expense for intangible assets was $65 and $196 for the three- and nine-month periods ended September 27, 2020 , and $69 and $209 for the three- and nine-month periods ended September 29, 2019 , respectively.

Revenue

Revenue	9 Months Ended
	Sep. 27, 2020
Revenue Recognition [Abstract]
Revenue	REVENUE Performance Obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account for revenue. A contract’s transaction price is allocated to each distinct performance obligation within that contract and recognized as revenue when, or as, the performance obligation is satisfied. The majority of our contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and is, therefore, not distinct. Some of our contracts have multiple performance obligations, most commonly due to the contract covering multiple phases of the product life cycle (development, production, maintenance and support). For contracts with multiple performance obligations, we allocate the contract’s transaction price to each performance obligation using our best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which we forecast our expected costs of satisfying a performance obligation and then add an appropriate margin for that distinct good or service. Contract modifications are routine in the performance of our contracts. Contracts are often modified to account for changes in contract specifications or requirements. In most instances, contract modifications are for goods or services that are not distinct and, therefore, are accounted for as part of the existing contract. Our performance obligations are satisfied over time as work progresses or at a point in time. Revenue from products and services transferred to customers over time accounted for 77% and 78% of our revenue for the three- and nine-month periods ended September 27, 2020 , and 72% and 74% of our revenue for the three- and nine-month periods ended September 29, 2019 , respectively. Substantially all of our revenue in the defense segments is recognized over time, because control is transferred continuously to our customers. Typically, revenue is recognized over time using costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying our performance obligations. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Contract costs include labor, material, overhead and, when appropriate, G&A expenses. Revenue from goods and services transferred to customers at a point in time accounted for 23% and 22% of our revenue for the three- and nine-month periods ended September 27, 2020 , and 28% and 26% of our revenue for the three- and nine-month periods ended September 29, 2019 , respectively. The majority of our revenue recognized at a point in time is for the manufacture of business-jet aircraft in our Aerospace segment. Revenue on these contracts is recognized when the customer obtains control of the asset, which is generally upon delivery and acceptance by the customer of the fully outfitted aircraft. On September 27, 2020 , we had $81.5 billion of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 45% of our remaining performance obligations as revenue by year-end 2021, an additional 30% by year-end 2023 and the balance thereafter. Contract Estimates. The majority of our revenue is derived from long-term contracts and programs that can span several years. Accounting for long-term contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For long-term contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events that often span several years. These assumptions include labor productivity and availability; the complexity of the work to be performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The nature of our contracts gives rise to several types of variable consideration, including claims and award and incentive fees. We include in our contract estimates additional revenue for submitted contract modifications or claims against the customer when we believe we have an enforceable right to the modification or claim, the amount can be estimated reliably and its realization is probable. In evaluating these criteria, we consider the contractual/legal basis for the claim, the cause of any additional costs incurred, the reasonableness of those costs and the objective evidence available to support the claim. We include award or incentive fees in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee. These estimates are based on historical award experience, anticipated performance and our best judgment at the time. Because of our certainty in estimating these amounts, they are included in the transaction price of our contracts and the associated remaining performance obligations. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up method. Under this method, the impact of the adjustment on profit recorded to date on a contract is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the period it is identified. The impact of adjustments in contract estimates on our operating earnings can be reflected in either operating costs and expenses or revenue. The aggregate impact of adjustments in contract estimates increased our revenue, operating earnings and diluted earnings per share as follows: Three Months Ended Nine Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Revenue $ 126 $ 95 $ 270 $ 263 Operating earnings 84 81 169 220 Diluted earnings per share $ 0.23 $ 0.22 $ 0.46 $ 0.60 No adjustment on any one contract was material to the unaudited Consolidated Financial Statements for the three- and nine-month periods ended September 27, 2020 , or September 29, 2019 . Revenue by Category. Our portfolio of products and services consists of approximately 11,000 active contracts. The following series of tables presents our revenue disaggregated by several categories. Revenue by major products and services was as follows: Three Months Ended Nine Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Aircraft manufacturing and completions $ 1,546 $ 1,972 $ 4,303 $ 5,304 Aircraft services 429 523 1,337 1,567 Total Aerospace 1,975 2,495 5,640 6,871 Military vehicles 1,179 1,137 3,428 3,361 Weapons systems, armament and munitions 496 474 1,444 1,336 Engineering and other services 126 129 391 338 Total Combat Systems 1,801 1,740 5,263 5,035 IT services 2,029 2,071 5,901 6,398 Total Information Technology 2,029 2,071 5,901 6,398 C4ISR solutions 1,221 1,220 3,518 3,655 Total Mission Systems 1,221 1,220 3,518 3,655 Nuclear-powered submarines 1,704 1,567 4,972 4,482 Surface ships 461 402 1,433 1,376 Repair and other services 240 266 717 760 Total Marine Systems 2,405 2,235 7,122 6,618 Total revenue $ 9,431 $ 9,761 $ 27,444 $ 28,577 Revenue by contract type was as follows: Three Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue Fixed-price $ 1,821 $ 1,552 $ 806 $ 694 $ 1,641 $ 6,514 Cost-reimbursement — 231 846 478 763 2,318 Time-and-materials 154 18 377 49 1 599 Total revenue $ 1,975 $ 1,801 $ 2,029 $ 1,221 $ 2,405 $ 9,431 Three Months Ended September 29, 2019 Fixed-price $ 2,306 $ 1,501 $ 824 $ 719 $ 1,517 $ 6,867 Cost-reimbursement — 230 838 458 716 2,242 Time-and-materials 189 9 409 43 2 652 Total revenue $ 2,495 $ 1,740 $ 2,071 $ 1,220 $ 2,235 $ 9,761 Nine Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue Fixed-price $ 5,148 $ 4,524 $ 2,317 $ 1,976 $ 4,926 $ 18,891 Cost-reimbursement — 690 2,539 1,403 2,188 6,820 Time-and-materials 492 49 1,045 139 8 1,733 Total revenue $ 5,640 $ 5,263 $ 5,901 $ 3,518 $ 7,122 $ 27,444 Nine Months Ended September 29, 2019 Fixed-price $ 6,271 $ 4,344 $ 2,620 $ 2,122 $ 4,508 $ 19,865 Cost-reimbursement — 662 2,537 1,405 2,101 6,705 Time-and-materials 600 29 1,241 128 9 2,007 Total revenue $ 6,871 $ 5,035 $ 6,398 $ 3,655 $ 6,618 $ 28,577 Our segments operate under fixed-price, cost-reimbursement and time-and-materials contracts. Our production contracts are primarily fixed-price. Under these contracts, we agree to perform a specific scope of work for a fixed amount. Contracts for research, engineering, repair and maintenance, and other services are typically cost-reimbursement or time-and-materials. Under cost-reimbursement contracts, the customer reimburses contract costs incurred and pays a fixed, incentive or award-based fee. These fees are determined by our ability to achieve targets set in the contract, such as cost, quality, schedule and performance. Under time-and-materials contracts, the customer pays a fixed hourly rate for direct labor and generally reimburses us for the cost of materials. Each of these contract types presents advantages and disadvantages. Typically, we assume more risk with fixed-price contracts. However, these types of contracts offer additional profits when we complete the work for less than originally estimated. Cost-reimbursement contracts generally subject us to lower risk. Accordingly, the associated base fees are usually lower than fees earned on fixed-price contracts. Under time-and-materials contracts, our profit may vary if actual labor-hour rates vary significantly from the negotiated rates. Also, because these contracts can provide little or no fee for managing material costs, the content mix can impact profitability. Revenue by customer was as follows: Three Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue U.S. government: DoD $ 41 $ 942 $ 882 $ 941 $ 2,333 $ 5,139 Non-DoD — 3 1,088 112 1 1,204 Foreign Military Sales (FMS) 23 87 3 5 51 169 Total U.S. government 64 1,032 1,973 1,058 2,385 6,512 U.S. commercial 1,123 76 51 13 17 1,280 Non-U.S. government 59 678 5 134 2 878 Non-U.S. commercial 729 15 — 16 1 761 Total revenue $ 1,975 $ 1,801 $ 2,029 $ 1,221 $ 2,405 $ 9,431 Three Months Ended September 29, 2019 U.S. government: DoD $ 87 $ 931 $ 875 $ 861 $ 2,157 $ 4,911 Non-DoD — 3 1,141 135 — 1,279 FMS 18 58 3 12 43 134 Total U.S. government 105 992 2,019 1,008 2,200 6,324 U.S. commercial 1,365 62 52 33 31 1,543 Non-U.S. government 77 663 — 145 3 888 Non-U.S. commercial 948 23 — 34 1 1,006 Total revenue $ 2,495 $ 1,740 $ 2,071 $ 1,220 $ 2,235 $ 9,761 Nine Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue U.S. government: DoD $ 254 $ 2,760 $ 2,556 $ 2,599 $ 6,882 $ 15,051 Non-DoD — 9 3,196 335 3 3,543 FMS 93 275 11 23 151 553 Total U.S. government 347 3,044 5,763 2,957 7,036 19,147 U.S. commercial 2,935 217 138 73 77 3,440 Non-U.S. government 133 1,959 — 403 7 2,502 Non-U.S. commercial 2,225 43 — 85 2 2,355 Total revenue $ 5,640 $ 5,263 $ 5,901 $ 3,518 $ 7,122 $ 27,444 Nine Months Ended September 29, 2019 U.S. government: DoD $ 262 $ 2,634 $ 2,725 $ 2,529 $ 6,375 $ 14,525 Non-DoD — 9 3,511 403 1 3,924 FMS 47 227 12 33 134 453 Total U.S. government 309 2,870 6,248 2,965 6,510 18,902 U.S. commercial 3,820 171 137 107 97 4,332 Non-U.S. government 284 1,951 13 492 7 2,747 Non-U.S. commercial 2,458 43 — 91 4 2,596 Total revenue $ 6,871 $ 5,035 $ 6,398 $ 3,655 $ 6,618 $ 28,577 Contract Balances. The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets), and customer advances and deposits (contract liabilities) on the Consolidated Balance Sheet. In our defense segments, amounts are billed as work progresses in accordance with agreed-upon contractual terms, either at periodic intervals (e.g., biweekly or monthly) or upon achievement of contractual milestones. Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, we sometimes receive advances or deposits from our customers, particularly on our international contracts, before revenue is recognized, resulting in contract liabilities. These assets and liabilities are reported on the Consolidated Balance Sheet on a contract-by-contract basis at the end of each reporting period. In our Aerospace segment, we generally receive deposits from customers upon contract execution and upon achievement of contractual milestones. These deposits are liquidated when revenue is recognized. Changes in the contract asset and liability balances during the nine-month period ended September 27, 2020 , were not materially impacted by any other factors. Revenue recognized for the three- and nine-month periods ended September 27, 2020 , and September 29, 2019 , that was included in the contract liability balance at the beginning of each year was $767 and $3.2 billion , and $1.1 billion and $4 billion , respectively. This revenue represented primarily the sale of business-jet aircraft.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 27, 2020
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE We compute basic earnings per share (EPS) using net earnings for the period and the weighted average number of common shares outstanding during the period. Diluted EPS incorporates the additional shares issuable upon the assumed exercise of stock options and the release of restricted stock and restricted stock units (RSUs). Basic and diluted weighted average shares outstanding were as follows (in thousands): Three Months Ended Nine Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Basic weighted average shares outstanding 286,452 288,374 287,136 288,130 Dilutive effect of stock options and restricted stock/RSUs* 775 2,518 927 2,704 Diluted weighted average shares outstanding 287,227 290,892 288,063 290,834 * Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the period and, therefore, the effect of including these options would be antidilutive. These options totaled 7,551 and 7,034 for the three- and nine-month periods ended September 27, 2020 , and 5,270 and 4,899 for the three- and nine-month periods ended September 29, 2019 , respectively.

Fair Value

Fair Value	9 Months Ended
	Sep. 27, 2020
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between marketplace participants. Various valuation approaches can be used to determine fair value, each requiring different valuation inputs. The following hierarchy classifies the inputs used to determine fair value into three levels: • Level 1 - quoted prices in active markets for identical assets or liabilities; • Level 2 - inputs, other than quoted prices, observable by a marketplace participant either directly or indirectly; and • Level 3 - unobservable inputs significant to the fair value measurement. We did not have any significant non-financial assets or liabilities measured at fair value on September 27, 2020 , or December 31, 2019 . Our financial instruments include cash and equivalents, accounts receivable and payable, marketable securities held in trust and other investments, short- and long-term debt, and derivative financial instruments. The carrying values of cash and equivalents and accounts receivable and payable on the unaudited Consolidated Balance Sheet approximate their fair value. The following tables present the fair values of our other financial assets and liabilities on September 27, 2020 , and December 31, 2019 , and the basis for determining their fair values: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets (Liabilities) September 27, 2020 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 6 $ 6 $ — $ 6 $ — Available-for-sale debt securities 138 138 — 138 — Equity securities 55 55 55 — — Other investments 9 9 — — 9 Cash flow hedges 207 207 — 207 — Measured at amortized cost: Short- and long-term debt principal (13,498 ) (14,928 ) — (14,928 ) — December 31, 2019 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 24 $ 24 $ 11 $ 13 $ — Available-for-sale debt securities 129 129 — 129 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges 26 26 — 26 — Measured at amortized cost: Short- and long-term debt principal (12,005 ) (12,339 ) — (12,339 ) — Our Level 1 assets include investments in publicly traded equity securities valued using quoted prices from the market exchanges. The fair value of our Level 2 assets and liabilities, which consist primarily of fixed-income securities, cash flow hedge assets and our fixed-rate notes, is determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets. Our Level 3 assets include direct private equity investments that are measured using inputs unobservable to a marketplace participant.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 27, 2020
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Net Deferred Tax Liability. Our deferred tax assets and liabilities are included in other noncurrent assets and liabilities on the Consolidated Balance Sheet. Our net deferred tax liability consisted of the following: September 27, 2020 December 31, 2019 Deferred tax asset $ 34 $ 33 Deferred tax liability (462 ) (481 ) Net deferred tax liability $ (428 ) $ (448 ) Tax Uncertainties. We participate in the Internal Revenue Service (IRS) Compliance Assurance Process (CAP), a real-time audit of our consolidated federal corporate income tax return. The IRS has examined our consolidated federal income tax returns through 2018 and is currently reviewing our 2019 tax year. For all periods open to examination by tax authorities, we periodically assess our liabilities and contingencies based on the latest available information. Where we believe there is more than a 50% chance that our tax position will not be sustained, we record our best estimate of the resulting tax liability, including interest, in the Consolidated Financial Statements. We include any interest or penalties incurred in connection with income taxes as part of income tax expense. Based on all known facts and circumstances and current tax law, we believe the total amount of any unrecognized tax benefits on September 27, 2020 , was not material to our results of operations, financial condition or cash flows. In addition, there are no tax positions for which it is reasonably possible that the unrecognized tax benefits will vary significantly over the next 12 months, producing, individually or in the aggregate, a material effect on our results of operations, financial condition or cash flows.

Unbilled Receivables

Unbilled Receivables	9 Months Ended
	Sep. 27, 2020
Contractors [Abstract]
Unbilled Receivables	UNBILLED RECEIVABLES Unbilled receivables represent revenue recognized on long-term contracts (contract costs and estimated profits) less associated advances and progress billings. These amounts will be billed in accordance with the agreed-upon contractual terms. Unbilled receivables consisted of the following: September 27, 2020 December 31, 2019 Unbilled revenue $ 33,244 $ 33,481 Advances and progress billings (25,101 ) (25,624 ) Net unbilled receivables $ 8,143 $ 7,857 On September 27, 2020 , and December 31, 2019 , net unbilled receivables included $2.5 billion and $2.9 billion , respectively, associated with a large international wheeled armored vehicle contract in our Combat Systems segment. We had experienced delays in payment under the contract in 2018 and 2019, which resulted in the large unbilled receivables balance. In March 2020 , we finalized a new agreement with the customer that included a revised payment schedule. Under the new agreement, we received two $500 progress payments, one in each of the first and second quarters of 2020 . Further progress payments will be due annually that will liquidate the net unbilled receivables balance over the next few years.

Inventories

Inventories	9 Months Ended
	Sep. 27, 2020
Inventory Disclosure [Abstract]
Inventories	INVENTORIES The majority of our inventories are for business-jet aircraft. Our inventories are stated at the lower of cost or net realizable value. Work in process represents largely labor, material and overhead costs associated with aircraft in the manufacturing process and is based primarily on the estimated average unit cost in a production lot. Raw materials are valued primarily on the first-in, first-out method. We record pre-owned aircraft acquired in connection with the sale of new aircraft at the lower of the trade-in value or the estimated net realizable value. Inventories consisted of the following: September 27, 2020 December 31, 2019 Work in process $ 4,550 $ 4,419 Raw materials 1,769 1,733 Finished goods 24 30 Pre-owned aircraft 59 124 Total inventories $ 6,402 $ 6,306

Debt

Debt	9 Months Ended
	Sep. 27, 2020
Debt Disclosure [Abstract]
Debt	DEBT Debt consisted of the following: September 27, 2020 December 31, 2019 Fixed-rate notes due: Interest rate: May 2020 2.875% $ — $ 2,000 May 2021 3.000% 2,000 2,000 July 2021 3.875% 500 500 November 2022 2.250% 1,000 1,000 May 2023 3.375% 750 750 August 2023 1.875% 500 500 November 2024 2.375% 500 500 April 2025 3.250% 750 — May 2025 3.500% 750 750 August 2026 2.125% 500 500 April 2027 3.500% 750 — November 2027 2.625% 500 500 May 2028 3.750% 1,000 1,000 April 2030 3.625% 1,000 — April 2040 4.250% 750 — November 2042 3.600% 500 500 April 2050 4.250% 750 — Floating-rate notes due: May 2020 3-month LIBOR + 0.29% — 500 May 2021 3-month LIBOR + 0.38% 500 500 Other Various 498 505 Total debt principal 13,498 12,005 Less unamortized debt issuance costs and discounts 126 75 Total debt 13,372 11,930 Less current portion 3,394 2,920 Long-term debt $ 9,978 $ 9,010 In March 2020, we issued $4 billion of fixed-rate notes. The proceeds were used to repay $2.5 billion of fixed- and floating-rate notes that matured in May 2020 and for general corporate purposes, including the repayment of a portion of our borrowings under our commercial paper program. We also amended two of our credit facilities to, among other things, extend their expiration dates. On September 27, 2020 , we had no commercial paper outstanding, but we maintain the ability to access the commercial paper market in the future. Separately, we have $5 billion in committed bank credit facilities for general corporate purposes and working capital needs and to support our commercial paper issuances. These credit facilities include a $2 billion 364 -day facility expiring in March 2021 , a $2 billion multi-year facility expiring in March 2023 and a $1 billion multi-year facility expiring in March 2025 . We may renew or replace these credit facilities in whole or in part at or prior to their expiration dates. We also have an effective shelf registration on file with the Securities and Exchange Commission that allows us to access the debt markets. Our financing arrangements contain a number of customary covenants and restrictions. We were in compliance with all covenants and restrictions on September 27, 2020 .

Other Liabilities

Other Liabilities	9 Months Ended
	Sep. 27, 2020
Other Liabilities Disclosure [Abstract]
Other Liabilities	OTHER LIABILITIES A summary of significant other liabilities by balance sheet caption follows: September 27, 2020 December 31, 2019 Salaries and wages $ 1,064 $ 941 Workers’ compensation 316 306 Retirement benefits 292 296 Operating lease liabilities 268 252 Fair value of cash flow hedges 100 32 Other (a) 1,987 1,744 Total other current liabilities $ 4,027 $ 3,571 Retirement benefits $ 4,868 $ 5,172 Operating lease liabilities 1,151 1,251 Customer deposits on commercial contracts 865 709 Deferred income taxes 462 481 Other (b) 2,098 1,840 Total other liabilities $ 9,444 $ 9,453 (a) Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace segment, liabilities of discontinued operations, finance lease liabilities and insurance-related costs. (b) Consists primarily of warranty reserves, workers’ compensation liabilities, finance lease liabilities and liabilities of discontinued operations.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 27, 2020
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS ’ EQUITY Share Repurchases. Our board of directors from time to time authorizes management’s repurchase of outstanding shares of our common stock on the open market. On March 4, 2020, the board of directors authorized management to repurchase up to 10 million additional shares of the company’s outstanding stock. In the nine -month period ended September 27, 2020 , we repurchased 3.4 million of our outstanding shares for $501 . We did no t repurchase any shares in the second and third quarters of 2020. On September 27, 2020 , 13 million shares remained authorized by our board of directors for repurchase, representing 4.5% of our total shares outstanding. We repurchased 1.1 million shares for $184 in the nine -month period ended September 29, 2019 . Dividends per Share. Our board of directors declared dividends of $1.10 and $3.30 per share for the three- and nine-month periods ended September 27, 2020 , and $1.02 and $3.06 per share for the three- and nine-month periods ended September 29, 2019 , respectively. We paid cash dividends of $315 and $925 for the three- and nine-month periods ended September 27, 2020 , and $295 and $858 for the three- and nine-month periods ended September 29, 2019 , respectively. Accumulated Other Comprehensive Loss. The changes, pretax and net of tax, in each component of accumulated other comprehensive loss (AOCL) consisted of the following: Gains /(Losses) on Cash Flow Hedges Foreign Currency Translation Adjustments Changes in Retirement Plans’ Funded Status AOCL December 31, 2019 $ 2 $ 288 $ (4,509 ) $ (4,219 ) Other comprehensive income, pretax 181 60 218 459 Provision for income tax, net (49 ) — (46 ) (95 ) Other comprehensive income, net of tax 132 60 172 364 September 27, 2020 $ 134 $ 348 $ (4,337 ) $ (3,855 ) December 31, 2018 $ (71 ) $ 102 $ (3,809 ) $ (3,778 ) Other comprehensive income, pretax 70 48 188 306 Provision for income tax, net (17 ) — (42 ) (59 ) Other comprehensive income, net of tax 53 48 146 247 September 29, 2019 $ (18 ) $ 150 $ (3,663 ) $ (3,531 ) Amounts reclassified out of AOCL related primarily to changes in our retirement plans’ funded status and included pretax recognized net actuarial losses and amortization of prior service credit. See Note N for these amounts, which are included in our net periodic pension and other post-retirement benefit cost.

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	9 Months Ended
	Sep. 27, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Activities	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES We are exposed to market risk, primarily from foreign currency exchange rates, interest rates, commodity prices and investments. We may use derivative financial instruments to hedge some of these risks as described below. We do not use derivative financial instruments for trading or speculative purposes. Foreign Currency Risk. Our foreign currency exchange rate risk relates to receipts from customers, payments to suppliers and inter-company transactions denominated in foreign currencies. To the extent possible, we include terms in our contracts that are designed to protect us from this risk. Otherwise, we enter into derivative financial instruments, principally foreign currency forward purchase and sale contracts, designed to offset and minimize our risk. The dollar-weighted two -year average maturity of these instruments generally matches the duration of the activities that are at risk. Interest Rate Risk. Our financial instruments subject to interest rate risk include fixed- and floating-rate long-term debt obligations. We entered into derivative financial instruments, specifically interest rate swap contracts, to eliminate our floating-rate interest risk. The interest rate risk associated with our financial instruments is not material. Commodity Price Risk. We are subject to rising labor and commodity price risk, primarily on long-term, fixed-price contracts. To the extent possible, we include terms in our contracts that are designed to protect us from these risks. Some of the protective terms included in our contracts are considered derivative financial instruments but are not accounted for separately, because they are clearly and closely related to the host contract. We have not entered into any material commodity hedging contracts but may do so as circumstances warrant. We do not believe that changes in labor or commodity prices will have a material impact on our results of operations or cash flows. Investment Risk. Our investment policy allows for purchases of fixed-income securities with an investment-grade rating and a maximum maturity of up to five years . On September 27, 2020 , and December 31, 2019, we held $1.5 billion and $902 in cash and equivalents, respectively, but held no marketable securities other than those held in trust to meet some of our obligations under workers’ compensation and non-qualified supplemental executive retirement plans. On September 27, 2020 , and December 31, 2019 , we held marketable securities in trust of $199 and $207 , respectively. These marketable securities are reflected at fair value on the Consolidated Balance Sheet in other current and noncurrent assets. See Note E for additional details. Hedging Activities. We had notional forward exchange and interest rate swap contracts outstanding of $10 billion and $5 billion on September 27, 2020 , and December 31, 2019 , respectively. These derivative financial instruments are cash flow hedges, and are reflected at fair value on the Consolidated Balance Sheet in other current assets and liabilities. See Note E for additional details. Changes in fair value (gains and losses) related to derivative financial instruments that qualify as cash flow hedges are deferred in AOCL until the underlying transaction is reflected in earnings. Alternatively, gains and losses on derivative financial instruments that do not qualify for hedge accounting are recorded each period in earnings. All gains and losses from derivative financial instruments recognized in the Consolidated Statement of Earnings are presented in the same line item as the underlying transaction, either operating costs and expenses or interest expense. Net gains and losses recognized in earnings on derivative financial instruments that do not qualify for hedge accounting were not material to our results of operations for the three- and nine-month periods ended September 27, 2020 , and September 29, 2019 . Net gains and losses reclassified to earnings from AOCL related to qualified hedges were also not material to our results of operations for the three- and nine-month periods ended September 27, 2020 , and September 29, 2019 , and we do not expect the amount of these gains and losses that will be reclassified to earnings during the next 12 months to be material. We had no material derivative financial instruments designated as fair value or net investment hedges on September 27, 2020 , or December 31, 2019 . Foreign Currency Financial Statement Translation. We translate foreign currency balance sheets from our international businesses’ functional currency (generally the respective local currency) to U.S. dollars at the end-of-period exchange rates, and statements of earnings at the average exchange rates for each period. The resulting foreign currency translation adjustments are a component of AOCL. We do not hedge the fluctuation in reported revenue and earnings resulting from the translation of these international operations’ results into U.S. dollars. The impact of translating our non-U.S. operations’ revenue and earnings into U.S. dollars was not material to our results of operations for the three- and nine-month periods ended September 27, 2020 , or September 29, 2019 . In addition, the effect of changes in foreign exchange rates on non-U.S. cash balances was not material for the nine -month periods ended September 27, 2020 , and September 29, 2019 .

Commitments And Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 27, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Litigation In 2015, Electric Boat Corporation, a subsidiary of General Dynamics Corporation, received a Civil Investigative Demand from the U.S. Department of Justice regarding an investigation of potential False Claims Act violations relating to alleged failures of Electric Boat’s quality system with respect to allegedly non-conforming parts purchased from a supplier. In 2016, Electric Boat was made aware that it is a defendant in a lawsuit related to this matter which had been filed under seal in U.S. district court. Also in 2016, the Suspending and Debarring Official for the U.S. Department of the Navy issued a Show Cause Letter to Electric Boat requesting that Electric Boat respond to the official’s concerns regarding Electric Boat’s oversight and management with respect to its quality assurance systems for subcontractors and suppliers. Electric Boat responded to the Show Cause Letter and engaged in discussions with the U.S. government. In the third quarter of 2019, the Department of Justice declined to intervene in the qui tam action, noting that its investigation continues, and the court unsealed the relator’s complaint. In the first quarter of 2020, the relator filed an amended complaint. Given the current status of these matters, we are unable to express a view regarding the ultimate outcome or, if the outcome is adverse, to estimate an amount or range of reasonably possible loss. Depending on the outcome of these matters, there could be a material impact on our results of operations, financial condition and cash flows. Additionally, various other claims and legal proceedings incidental to the normal course of business are pending or threatened against us. These other matters relate to such issues as government investigations and claims, the protection of the environment, asbestos-related claims and employee-related matters. The nature of litigation is such that we cannot predict the outcome of these other matters. However, based on information currently available, we believe any potential liabilities in these other proceedings, individually or in the aggregate, will not have a material impact on our results of operations, financial condition or cash flows. Environmental We are subject to and affected by a variety of federal, state, local and foreign environmental laws and regulations. We are directly or indirectly involved in environmental investigations or remediation at some of our current and former facilities and third-party sites that we do not own but where we have been designated a Potentially Responsible Party (PRP) by the U.S. Environmental Protection Agency or a state environmental agency. Based on historical experience, we expect that a significant percentage of the total remediation and compliance costs associated with these facilities will continue to be allowable contract costs and, therefore, recoverable under U.S. government contracts. As required, we provide financial assurance for certain sites undergoing or subject to investigation or remediation. We accrue environmental costs when it is probable that a liability has been incurred and the amount can be reasonably estimated. Where applicable, we seek insurance recovery for costs related to environmental liabilities. We do not record insurance recoveries before collection is considered probable. Based on all known facts and analyses, we do not believe that our liability at any individual site, or in the aggregate, arising from such environmental conditions will be material to our results of operations, financial condition or cash flows. We also do not believe that the range of reasonably possible additional loss beyond what has been recorded would be material to our results of operations, financial condition or cash flows. Other Government Contracts. As a government contractor, we are subject to U.S. government audits and investigations relating to our operations, including claims for fines, penalties, and compensatory and treble damages. We believe the outcome of such ongoing government audits and investigations will not have a material impact on our results of operations, financial condition or cash flows. In the performance of our contracts, we routinely request contract modifications that require additional funding from the customer. Most often, these requests are due to customer-directed changes in the scope of work. While we are entitled to recovery of these costs under our contracts, the administrative process with our customer may be protracted. Based on the circumstances, we periodically file requests for equitable adjustment (REAs) that are sometimes converted into claims. In some cases, these requests are disputed by our customer. We believe our outstanding modifications, REAs and other claims will be resolved without material impact to our results of operations, financial condition or cash flows. Letters of Credit and Guarantees. In the ordinary course of business, we have entered into letters of credit, bank guarantees, surety bonds and other similar arrangements with financial institutions and insurance carriers totaling approximately $1.2 billion on September 27, 2020 . In addition, from time to time and in the ordinary course of business, we contractually guarantee the payment or performance of our subsidiaries arising under certain contracts. Aircraft Trade-ins. In connection with orders for new aircraft in contract backlog, our Aerospace segment has outstanding options with some customers to trade in aircraft as partial consideration in their new-aircraft transaction. These trade-in commitments are generally structured to establish the fair market value of the trade-in aircraft at a date generally 45 or fewer days preceding delivery of the new aircraft to the customer. At that time, the customer is required to either exercise the option or allow its expiration. Other trade-in commitments are structured to guarantee a pre-determined trade-in value. These commitments present more risk in the event of an adverse change in market conditions. In either case, any excess of the pre-established trade-in price above the fair market value at the time the new aircraft is delivered is treated as a reduction of revenue in the new-aircraft sales transaction. As of September 27, 2020 , the estimated change in fair market values from the date of the commitments was not material. Product Warranties. We provide warranties to our customers associated with certain product sales. We record estimated warranty costs in the period in which the related products are delivered. The warranty liability recorded at each balance sheet date is based generally on the number of months of warranty coverage remaining for the products delivered and the average historical monthly warranty payments. Warranty obligations incurred in connection with long-term production contracts are accounted for within the contract estimates at completion. Our other warranty obligations, primarily for business-jet aircraft, are included in other current and noncurrent liabilities on the Consolidated Balance Sheet. The changes in the carrying amount of warranty liabilities for the nine-month periods ended September 27, 2020 , and September 29, 2019 , were as follows: Nine Months Ended September 27, 2020 September 29, 2019 Beginning balance $ 619 $ 480 Warranty expense 72 84 Payments (72 ) (62 ) Adjustments 39 (14 ) Ending balance $ 658 $ 488

Retirement Plans

Retirement Plans	9 Months Ended
	Sep. 27, 2020
Retirement Benefits [Abstract]
Retirement Plans	RETIREMENT PLANS We provide defined-contribution benefits to eligible employees, as well as some remaining defined-benefit pension and other post-retirement benefits. Net periodic defined-benefit pension and other post-retirement benefit (credit) cost for the three- and nine-month periods ended September 27, 2020 , and September 29, 2019 , consisted of the following: Pension Benefits Other Post-retirement Benefits Three Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Service cost $ 29 $ 28 $ 2 $ 2 Interest cost 123 150 7 9 Expected return on plan assets (234 ) (228 ) (9 ) (9 ) Recognized net actuarial loss (gain) 87 98 — (2 ) Amortization of prior service credit (4 ) (4 ) (1 ) (1 ) Net periodic benefit cost (credit) $ 1 $ 44 $ (1 ) $ (1 ) Nine Months Ended Service cost $ 88 $ 84 $ 7 $ 6 Interest cost 369 450 21 27 Expected return on plan assets (703 ) (684 ) (27 ) (27 ) Recognized net actuarial loss (gain) 246 238 (2 ) (6 ) Amortization of prior service credit (13 ) (13 ) (1 ) (3 ) Net periodic benefit (credit) cost $ (13 ) $ 75 $ (2 ) $ (3 ) Based on changes in market conditions, we adjusted our assumptions for our non-qualified supplemental retirement plans in the third quarter of 2020 and the third quarter of 2019. As a result, both quarters reflect cumulative adjustments to recognize the resulting increases in expense. Our contractual arrangements with the U.S. government provide for the recovery of contributions to our pension and other post-retirement benefit plans covering employees working in our defense segments. For non-funded plans, our government contracts allow us to recover claims paid. Following payment, these recoverable amounts are allocated to contracts and billed to the customer in accordance with the Cost Accounting Standards (CAS) and specific contractual terms. For some of these plans, the cumulative pension and other post-retirement benefit cost exceeds the amount currently allocable to contracts. To the extent we consider recovery of the cost to be probable based on our backlog and probable follow-on contracts, we defer the excess in other contract costs in other current assets on the Consolidated Balance Sheet until the cost is allocable to contracts. For other plans, the amount allocated to contracts and included in revenue has exceeded the plans’ cumulative benefit cost. We have similarly deferred recognition of these excess earnings on the Consolidated Balance Sheet.

Segment Information

Segment Information	9 Months Ended
	Sep. 27, 2020
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We have five operating segments: Aerospace, Combat Systems, Information Technology, Mission Systems and Marine Systems. We organize our segments in accordance with the nature of products and services offered. We measure each segment’s profitability based on operating earnings. As a result, we do not allocate net interest, other income and expense items, and income taxes to our segments. Summary financial information for each of our segments follows: Revenue Operating Earnings Three Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Aerospace $ 1,975 $ 2,495 $ 283 $ 393 Combat Systems 1,801 1,740 270 264 Information Technology 2,029 2,071 146 146 Mission Systems 1,221 1,220 168 185 Marine Systems 2,405 2,235 223 209 Corporate — — (6 ) 19 Total $ 9,431 $ 9,761 $ 1,084 $ 1,216 Nine Months Ended Aerospace $ 5,640 $ 6,871 $ 682 $ 1,052 Combat Systems 5,263 5,035 732 712 Information Technology 5,901 6,398 379 456 Mission Systems 3,518 3,655 480 495 Marine Systems 7,122 6,618 607 586 Corporate — — (14 ) 19 Total $ 27,444 $ 28,577 $ 2,866 $ 3,320 Corporate operating results have two primary components: pension and other post-retirement benefit income, and equity-based compensation expense. We are required to report the non-service cost components of pension and other post-retirement benefit cost (e.g., interest cost) in other income (expense) in the Consolidated Statement of Earnings. As described in Note N, in our defense segments, pension and other post-retirement benefit costs are recoverable contract costs. Therefore, the non-service cost components are included in the operating results of these segments, but an offset is reported in Corporate.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 27, 2020
Accounting Policies [Abstract]
Basis of Consolidation and Classification	Basis of Consolidation and Classification. The unaudited Consolidated Financial Statements include the accounts of General Dynamics Corporation and our wholly owned and majority-owned subsidiaries. We eliminate all inter-company balances and transactions in the unaudited Consolidated Financial Statements. Some prior-year amounts have been reclassified among financial statement accounts or disclosures to conform to the current-year presentation. Consistent with industry practice, we classify assets and liabilities related to long-term contracts as current, even though some of these amounts may not be realized within one year.
Interim Financial Statements	Interim Financial Statements. The unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. These rules and regulations permit some of the information and footnote disclosures included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) to be condensed or omitted. Our fiscal quarters are typically 13 weeks in length. Because our fiscal year ends on December 31, the number of days in our first and fourth quarters varies slightly from year to year. Operating results for the three- and nine-month periods ended September 27, 2020 , are not necessarily indicative of the results that may be expected for the year ending December 31, 2020 . The unaudited Consolidated Financial Statements contain all adjustments that are of a normal recurring nature necessary for a fair presentation of our results of operations and financial condition for the three- and nine-month periods ended September 27, 2020 , and September 29, 2019 . These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2019 .
Use of Estimates and Other Uncertainties	Use of Estimates and Other Uncertainties. The Coronavirus (COVID-19) outbreak has caused significant disruptions to national and global economies and government activities. Our businesses have been designated as critical infrastructure by the U.S. government and many non-U.S. governments and, as such, are required to stay open. Within our Aerospace segment, quarantine and travel restrictions in connection with the outbreak have impacted the timing of aircraft deliveries, and the economic consequences of COVID-19 have impacted demand. Our defense business has also experienced disruptions, such as customer site closures, travel restrictions and social distancing requirements, which have impacted contract execution. We have instituted various initiatives throughout the company as part of our business continuity programs, and we continue to work to mitigate risk when disruptions occur. While we expect this situation to be temporary, any longer-term impact to our business is currently unknown due to the uncertainty around the outbreak’s duration and its broader impact. The nature of our business requires that we make estimates and assumptions in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reporting period. The COVID-19 outbreak has impacted these estimates and assumptions and will continue to do so. The accounting for long-term contracts requires the use of estimates (see Note C). Our estimates at the end of the third quarter included impacts from the disruptions caused by COVID-19. Given the uncertainties around the pandemic, including its duration and potential future disruptions to our supply chain or workforce, it is reasonably possible that the actual impact of the pandemic on contract costs could be materially different than our current estimates. The United States and some other governments have taken steps to provide relief. Where our customer has agreed to reimburse certain costs, such as provided for by the Coronavirus Aid, Relief, and Economic Security Act (the CARES Act), we have included those recoveries in our estimates of revenue. To the extent the U.S. government provides for reimbursement of additional costs through legislation and the U.S. Department of Defense (DoD) has available funds, we will seek reimbursement as appropriate. The company is also monitoring for other long-term impacts of the pandemic, such as the impairment of goodwill, intangibles or other long-lived assets. As of the end of the quarter, we have not identified a triggering event requiring an impairment test.
Accounting Standards Updates	Accounting Standards Updates. Effective January 1, 2020, we adopted ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 significantly changes how entities account for credit losses for financial assets and certain other instruments, including trade receivables and contract assets, that are not measured at fair value through net income. The ASU requires a number of changes to the assessment of credit losses, including the utilization of an expected credit loss model, which requires consideration of a broader range of information to estimate expected credit losses over the entire lifetime of the asset, including losses where probability is considered remote. Additionally, the standard requires the estimation of lifetime expected losses for trade receivables and contract assets that are classified as current. We adopted the standard on a modified retrospective basis and recognized the cumulative effect as a $37 decrease to retained earnings on the date of adoption. There are other accounting standards that have been issued by the Financial Accounting Standards Board but are not yet effective. These standards are not expected to have a material impact on our results of operations, financial condition or cash flows.
Revenue	Contract Balances. Performance Obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account for revenue. A contract’s transaction price is allocated to each distinct performance obligation within that contract and recognized as revenue when, or as, the performance obligation is satisfied. The majority of our contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and is, therefore, not distinct. Some of our contracts have multiple performance obligations, most commonly due to the contract covering multiple phases of the product life cycle (development, production, maintenance and support). For contracts with multiple performance obligations, we allocate the contract’s transaction price to each performance obligation using our best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which we forecast our expected costs of satisfying a performance obligation and then add an appropriate margin for that distinct good or service. Contract modifications are routine in the performance of our contracts. Contracts are often modified to account for changes in contract specifications or requirements. In most instances, contract modifications are for goods or services that are not distinct and, therefore, are accounted for as part of the existing contract. Our performance obligations are satisfied over time as work progresses or at a point in time. Revenue from products and services transferred to customers over time accounted for 77% and 78% of our revenue for the three- and nine-month periods ended September 27, 2020 , and 72% and 74% of our revenue for the three- and nine-month periods ended September 29, 2019 , respectively. Substantially all of our revenue in the defense segments is recognized over time, because control is transferred continuously to our customers. Typically, revenue is recognized over time using costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying our performance obligations. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Contract costs include labor, material, overhead and, when appropriate, G&A expenses. Revenue from goods and services transferred to customers at a point in time accounted for 23% and 22% of our revenue for the three- and nine-month periods ended September 27, 2020 , and 28% and 26% of our revenue for the three- and nine-month periods ended September 29, 2019 , respectively. The majority of our revenue recognized at a point in time is for the manufacture of business-jet aircraft in our Aerospace segment. Revenue on these contracts is recognized when the customer obtains control of the asset, which is generally upon delivery and acceptance by the customer of the fully outfitted aircraft. On September 27, 2020 , we had $81.5 billion of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 45% of our remaining performance obligations as revenue by year-end 2021, an additional 30% by year-end 2023 and the balance thereafter. Contract Estimates. The majority of our revenue is derived from long-term contracts and programs that can span several years. Accounting for long-term contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For long-term contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events that often span several years. These assumptions include labor productivity and availability; the complexity of the work to be performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The nature of our contracts gives rise to several types of variable consideration, including claims and award and incentive fees. We include in our contract estimates additional revenue for submitted contract modifications or claims against the customer when we believe we have an enforceable right to the modification or claim, the amount can be estimated reliably and its realization is probable. In evaluating these criteria, we consider the contractual/legal basis for the claim, the cause of any additional costs incurred, the reasonableness of those costs and the objective evidence available to support the claim. We include award or incentive fees in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee. These estimates are based on historical award experience, anticipated performance and our best judgment at the time. Because of our certainty in estimating these amounts, they are included in the transaction price of our contracts and the associated remaining performance obligations. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up method. Under this method, the impact of the adjustment on profit recorded to date on a contract is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the period it is identified. Our segments operate under fixed-price, cost-reimbursement and time-and-materials contracts. Our production contracts are primarily fixed-price. Under these contracts, we agree to perform a specific scope of work for a fixed amount. Contracts for research, engineering, repair and maintenance, and other services are typically cost-reimbursement or time-and-materials. Under cost-reimbursement contracts, the customer reimburses contract costs incurred and pays a fixed, incentive or award-based fee. These fees are determined by our ability to achieve targets set in the contract, such as cost, quality, schedule and performance. Under time-and-materials contracts, the customer pays a fixed hourly rate for direct labor and generally reimburses us for the cost of materials. Each of these contract types presents advantages and disadvantages. Typically, we assume more risk with fixed-price contracts. However, these types of contracts offer additional profits when we complete the work for less than originally estimated. Cost-reimbursement contracts generally subject us to lower risk. Accordingly, the associated base fees are usually lower than fees earned on fixed-price contracts. Under time-and-materials contracts, our profit may vary if actual labor-hour rates vary significantly from the negotiated rates. Also, because these contracts can provide little or no fee for managing material costs, the content mix can impact profitability. Revenue by Category. Our portfolio of products and services consists of approximately 11,000 active contracts. The following series of tables presents our revenue disaggregated by several categories. Aircraft Trade-ins. In connection with orders for new aircraft in contract backlog, our Aerospace segment has outstanding options with some customers to trade in aircraft as partial consideration in their new-aircraft transaction. These trade-in commitments are generally structured to establish the fair market value of the trade-in aircraft at a date generally 45
Earnings Per Share	We compute basic earnings per share (EPS) using net earnings for the period and the weighted average number of common shares outstanding during the period. Diluted EPS incorporates the additional shares issuable upon the assumed exercise of stock options and the release of restricted stock and restricted stock units (RSUs).
Fair Value	Our financial instruments include cash and equivalents, accounts receivable and payable, marketable securities held in trust and other investments, short- and long-term debt, and derivative financial instruments. The carrying values of cash and equivalents and accounts receivable and payable on the unaudited Consolidated Balance Sheet approximate their fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between marketplace participants. Various valuation approaches can be used to determine fair value, each requiring different valuation inputs. The following hierarchy classifies the inputs used to determine fair value into three levels: • Level 1 - quoted prices in active markets for identical assets or liabilities; • Level 2 - inputs, other than quoted prices, observable by a marketplace participant either directly or indirectly; and • Level 3 - unobservable inputs significant to the fair value measurement. Our Level 1 assets include investments in publicly traded equity securities valued using quoted prices from the market exchanges. The fair value of our Level 2 assets and liabilities, which consist primarily of fixed-income securities, cash flow hedge assets and our fixed-rate notes, is determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets. Our Level 3 assets include direct private equity investments that are measured using inputs unobservable to a marketplace participant.
Tax Uncertainties	Tax Uncertainties. We participate in the Internal Revenue Service (IRS) Compliance Assurance Process (CAP), a real-time audit of our consolidated federal corporate income tax return. The IRS has examined our consolidated federal income tax returns through 2018 and is currently reviewing our 2019 tax year. For all periods open to examination by tax authorities, we periodically assess our liabilities and contingencies based on the latest available information. Where we believe there is more than a 50% chance that our tax position will not be sustained, we record our best estimate of the resulting tax liability, including interest, in the Consolidated Financial Statements. We include any interest or penalties incurred in connection with income taxes as part of income tax expense. Based on all known facts and circumstances and current tax law, we believe the total amount of any unrecognized tax benefits on September 27, 2020 , was not material to our results of operations, financial condition or cash flows. In addition, there are no tax positions for which it is reasonably possible that the unrecognized tax benefits will vary significantly over the next 12 months, producing, individually or in the aggregate, a material effect on our results of operations, financial condition or cash flows.
Unbilled Receivables	Unbilled receivables represent revenue recognized on long-term contracts (contract costs and estimated profits) less associated advances and progress billings. These amounts will be billed in accordance with the agreed-upon contractual terms.
Inventories	The majority of our inventories are for business-jet aircraft. Our inventories are stated at the lower of cost or net realizable value. Work in process represents largely labor, material and overhead costs associated with aircraft in the manufacturing process and is based primarily on the estimated average unit cost in a production lot. Raw materials are valued primarily on the first-in, first-out method. We record pre-owned aircraft acquired in connection with the sale of new aircraft at the lower of the trade-in value or the estimated net realizable value.
Derivative Financial Instruments and Hedging Activities	We are exposed to market risk, primarily from foreign currency exchange rates, interest rates, commodity prices and investments. We may use derivative financial instruments to hedge some of these risks as described below. We do not use derivative financial instruments for trading or speculative purposes. Interest Rate Risk. Our financial instruments subject to interest rate risk include fixed- and floating-rate long-term debt obligations. We entered into derivative financial instruments, specifically interest rate swap contracts, to eliminate our floating-rate interest risk. The interest rate risk associated with our financial instruments is not material. Commodity Price Risk. We are subject to rising labor and commodity price risk, primarily on long-term, fixed-price contracts. To the extent possible, we include terms in our contracts that are designed to protect us from these risks. Some of the protective terms included in our contracts are considered derivative financial instruments but are not accounted for separately, because they are clearly and closely related to the host contract. We have not entered into any material commodity hedging contracts but may do so as circumstances warrant. We do not believe that changes in labor or commodity prices will have a material impact on our results of operations or cash flows. Investment Risk. Our investment policy allows for purchases of fixed-income securities with an investment-grade rating and a maximum maturity of up to five years Foreign Currency Risk. Our foreign currency exchange rate risk relates to receipts from customers, payments to suppliers and inter-company transactions denominated in foreign currencies. To the extent possible, we include terms in our contracts that are designed to protect us from this risk. Otherwise, we enter into derivative financial instruments, principally foreign currency forward purchase and sale contracts, designed to offset and minimize our risk. The dollar-weighted two Hedging Activities. We had notional forward exchange and interest rate swap contracts outstanding of $10 billion and $5 billion on September 27, 2020 , and December 31, 2019 , respectively. These derivative financial instruments are cash flow hedges, and are reflected at fair value on the Consolidated Balance Sheet in other current assets and liabilities. See Note E for additional details. Changes in fair value (gains and losses) related to derivative financial instruments that qualify as cash flow hedges are deferred in AOCL until the underlying transaction is reflected in earnings. Alternatively, gains and losses on derivative financial instruments that do not qualify for hedge accounting are recorded each period in earnings. All gains and losses from derivative financial instruments recognized in the Consolidated Statement of Earnings are presented in the same line item as the underlying transaction, either operating costs and expenses or interest expense.
Foreign Currency and Financial Statement Translation	Foreign Currency Financial Statement Translation. We translate foreign currency balance sheets from our international businesses’ functional currency (generally the respective local currency) to U.S. dollars at the end-of-period exchange rates, and statements of earnings at the average exchange rates for each period. The resulting foreign currency translation adjustments are a component of AOCL.
Commitments and Contingencies	In addition, from time to time and in the ordinary course of business, we contractually guarantee the payment or performance of our subsidiaries arising under certain contracts. Environmental We are subject to and affected by a variety of federal, state, local and foreign environmental laws and regulations. We are directly or indirectly involved in environmental investigations or remediation at some of our current and former facilities and third-party sites that we do not own but where we have been designated a Potentially Responsible Party (PRP) by the U.S. Environmental Protection Agency or a state environmental agency. Based on historical experience, we expect that a significant percentage of the total remediation and compliance costs associated with these facilities will continue to be allowable contract costs and, therefore, recoverable under U.S. government contracts. As required, we provide financial assurance for certain sites undergoing or subject to investigation or remediation. We accrue environmental costs when it is probable that a liability has been incurred and the amount can be reasonably estimated. Where applicable, we seek insurance recovery for costs related to environmental liabilities. We do not record insurance recoveries before collection is considered probable. Based on all known facts and analyses, we do not believe that our liability at any individual site, or in the aggregate, arising from such environmental conditions will be material to our results of operations, financial condition or cash flows. We also do not believe that the range of reasonably possible additional loss beyond what has been recorded would be material to our results of operations, financial condition or cash flows. Other Government Contracts. As a government contractor, we are subject to U.S. government audits and investigations relating to our operations, including claims for fines, penalties, and compensatory and treble damages. We believe the outcome of such ongoing government audits and investigations will not have a material impact on our results of operations, financial condition or cash flows. In the performance of our contracts, we routinely request contract modifications that require additional funding from the customer. Most often, these requests are due to customer-directed changes in the scope of work. While we are entitled to recovery of these costs under our contracts, the administrative process with our customer may be protracted. Based on the circumstances, we periodically file requests for equitable adjustment (REAs) that are sometimes converted into claims. In some cases, these requests are disputed by our customer. We believe our outstanding modifications, REAs and other claims will be resolved without material impact to our results of operations, financial condition or cash flows. Letters of Credit and Guarantees.
Product Warranties	Product Warranties. We provide warranties to our customers associated with certain product sales. We record estimated warranty costs in the period in which the related products are delivered. The warranty liability recorded at each balance sheet date is based generally on the number of months of warranty coverage remaining for the products delivered and the average historical monthly warranty payments. Warranty obligations incurred in connection with long-term production contracts are accounted for within the contract estimates at completion. Our other warranty obligations, primarily for business-jet aircraft, are included in other current and noncurrent liabilities on the Consolidated Balance Sheet.
Retirement Plans	We provide defined-contribution benefits to eligible employees, as well as some remaining defined-benefit pension and other post-retirement benefits. Our contractual arrangements with the U.S. government provide for the recovery of contributions to our pension and other post-retirement benefit plans covering employees working in our defense segments. For non-funded plans, our government contracts allow us to recover claims paid. Following payment, these recoverable amounts are allocated to contracts and billed to the customer in accordance with the Cost Accounting Standards (CAS) and specific contractual terms. For some of these plans, the cumulative pension and other post-retirement benefit cost exceeds the amount currently allocable to contracts. To the extent we consider recovery of the cost to be probable based on our backlog and probable follow-on contracts, we defer the excess in other contract costs in other current assets on the Consolidated Balance Sheet until the cost is allocable to contracts. For other plans, the amount allocated to contracts and included in revenue has exceeded the plans’ cumulative benefit cost. We have similarly deferred recognition of these excess earnings on the Consolidated Balance Sheet.
Segment Information	We have five operating segments: Aerospace, Combat Systems, Information Technology, Mission Systems and Marine Systems. We organize our segments in accordance with the nature of products and services offered. We measure each segment’s profitability based on operating earnings. As a result, we do not allocate net interest, other income and expense items, and income taxes to our segments. Corporate operating results have two primary components: pension and other post-retirement benefit income, and equity-based compensation expense. We are required to report the non-service cost components of pension and other post-retirement benefit cost (e.g., interest cost) in other income (expense) in the Consolidated Statement of Earnings. As described in Note N, in our defense segments, pension and other post-retirement benefit costs are recoverable contract costs. Therefore, the non-service cost components are included in the operating results of these segments, but an offset is reported in Corporate.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 27, 2020
Accounting Policies [Abstract]
Schedule of Property, Plant and Equipment, Net	Property, plant and equipment (PP&E) is carried at historical cost, net of accumulated depreciation. Net PP&E consisted of the following: September 27, 2020 December 31, 2019 PP&E $ 10,361 $ 9,761 Accumulated depreciation (5,498 ) (5,286 ) PP&E, net $ 4,863 $ 4,475

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 27, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill By Reporting Unit	The changes in the carrying amount of goodwill by reporting unit were as follows: Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Goodwill December 31, 2019 (a) $ 2,831 $ 2,681 $ 9,700 $ 4,168 $ 297 $ 19,677 Acquisitions (b) 73 49 — — — 122 Other (c) 87 (6 ) — 9 — 90 September 27, 2020 (a) $ 2,991 $ 2,724 $ 9,700 $ 4,177 $ 297 $ 19,889 (a) Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively. (b) Includes businesses acquired in our Aerospace and Combat Systems segments and adjustments during the purchase price allocation period. (c) Consists primarily of adjustments for foreign currency translation.
Intangible Assets	Intangible assets consisted of the following: Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount September 27, 2020 December 31, 2019 Contract and program intangible assets (b) $ 3,745 $ (1,891 ) $ 1,854 $ 3,776 $ (1,779 ) $ 1,997 Trade names and trademarks 496 (216 ) 280 474 (195 ) 279 Technology and software 130 (103 ) 27 164 (126 ) 38 Other intangible assets 159 (158 ) 1 159 (158 ) 1 Total intangible assets $ 4,530 $ (2,368 ) $ 2,162 $ 4,573 $ (2,258 ) $ 2,315 (a) Changes in gross carrying amounts consist primarily of adjustments for acquired and divested intangible assets and foreign currency translation. (b)

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 27, 2020
Revenue Recognition [Abstract]
Schedule of Impact of Adjustments in Contract Estimates	The aggregate impact of adjustments in contract estimates increased our revenue, operating earnings and diluted earnings per share as follows: Three Months Ended Nine Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Revenue $ 126 $ 95 $ 270 $ 263 Operating earnings 84 81 169 220 Diluted earnings per share $ 0.23 $ 0.22 $ 0.46 $ 0.60
Revenue by Major Product Line	Revenue by major products and services was as follows: Three Months Ended Nine Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Aircraft manufacturing and completions $ 1,546 $ 1,972 $ 4,303 $ 5,304 Aircraft services 429 523 1,337 1,567 Total Aerospace 1,975 2,495 5,640 6,871 Military vehicles 1,179 1,137 3,428 3,361 Weapons systems, armament and munitions 496 474 1,444 1,336 Engineering and other services 126 129 391 338 Total Combat Systems 1,801 1,740 5,263 5,035 IT services 2,029 2,071 5,901 6,398 Total Information Technology 2,029 2,071 5,901 6,398 C4ISR solutions 1,221 1,220 3,518 3,655 Total Mission Systems 1,221 1,220 3,518 3,655 Nuclear-powered submarines 1,704 1,567 4,972 4,482 Surface ships 461 402 1,433 1,376 Repair and other services 240 266 717 760 Total Marine Systems 2,405 2,235 7,122 6,618 Total revenue $ 9,431 $ 9,761 $ 27,444 $ 28,577
Revenue by Contract Type	Revenue by contract type was as follows: Three Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue Fixed-price $ 1,821 $ 1,552 $ 806 $ 694 $ 1,641 $ 6,514 Cost-reimbursement — 231 846 478 763 2,318 Time-and-materials 154 18 377 49 1 599 Total revenue $ 1,975 $ 1,801 $ 2,029 $ 1,221 $ 2,405 $ 9,431 Three Months Ended September 29, 2019 Fixed-price $ 2,306 $ 1,501 $ 824 $ 719 $ 1,517 $ 6,867 Cost-reimbursement — 230 838 458 716 2,242 Time-and-materials 189 9 409 43 2 652 Total revenue $ 2,495 $ 1,740 $ 2,071 $ 1,220 $ 2,235 $ 9,761 Nine Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue Fixed-price $ 5,148 $ 4,524 $ 2,317 $ 1,976 $ 4,926 $ 18,891 Cost-reimbursement — 690 2,539 1,403 2,188 6,820 Time-and-materials 492 49 1,045 139 8 1,733 Total revenue $ 5,640 $ 5,263 $ 5,901 $ 3,518 $ 7,122 $ 27,444 Nine Months Ended September 29, 2019 Fixed-price $ 6,271 $ 4,344 $ 2,620 $ 2,122 $ 4,508 $ 19,865 Cost-reimbursement — 662 2,537 1,405 2,101 6,705 Time-and-materials 600 29 1,241 128 9 2,007 Total revenue $ 6,871 $ 5,035 $ 6,398 $ 3,655 $ 6,618 $ 28,577
Revenue by Customer	Revenue by customer was as follows: Three Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue U.S. government: DoD $ 41 $ 942 $ 882 $ 941 $ 2,333 $ 5,139 Non-DoD — 3 1,088 112 1 1,204 Foreign Military Sales (FMS) 23 87 3 5 51 169 Total U.S. government 64 1,032 1,973 1,058 2,385 6,512 U.S. commercial 1,123 76 51 13 17 1,280 Non-U.S. government 59 678 5 134 2 878 Non-U.S. commercial 729 15 — 16 1 761 Total revenue $ 1,975 $ 1,801 $ 2,029 $ 1,221 $ 2,405 $ 9,431 Three Months Ended September 29, 2019 U.S. government: DoD $ 87 $ 931 $ 875 $ 861 $ 2,157 $ 4,911 Non-DoD — 3 1,141 135 — 1,279 FMS 18 58 3 12 43 134 Total U.S. government 105 992 2,019 1,008 2,200 6,324 U.S. commercial 1,365 62 52 33 31 1,543 Non-U.S. government 77 663 — 145 3 888 Non-U.S. commercial 948 23 — 34 1 1,006 Total revenue $ 2,495 $ 1,740 $ 2,071 $ 1,220 $ 2,235 $ 9,761 Nine Months Ended September 27, 2020 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Revenue U.S. government: DoD $ 254 $ 2,760 $ 2,556 $ 2,599 $ 6,882 $ 15,051 Non-DoD — 9 3,196 335 3 3,543 FMS 93 275 11 23 151 553 Total U.S. government 347 3,044 5,763 2,957 7,036 19,147 U.S. commercial 2,935 217 138 73 77 3,440 Non-U.S. government 133 1,959 — 403 7 2,502 Non-U.S. commercial 2,225 43 — 85 2 2,355 Total revenue $ 5,640 $ 5,263 $ 5,901 $ 3,518 $ 7,122 $ 27,444 Nine Months Ended September 29, 2019 U.S. government: DoD $ 262 $ 2,634 $ 2,725 $ 2,529 $ 6,375 $ 14,525 Non-DoD — 9 3,511 403 1 3,924 FMS 47 227 12 33 134 453 Total U.S. government 309 2,870 6,248 2,965 6,510 18,902 U.S. commercial 3,820 171 137 107 97 4,332 Non-U.S. government 284 1,951 13 492 7 2,747 Non-U.S. commercial 2,458 43 — 91 4 2,596 Total revenue $ 6,871 $ 5,035 $ 6,398 $ 3,655 $ 6,618 $ 28,577

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 27, 2020
Earnings Per Share [Abstract]
Basic and diluted weighted average shares outstanding	Basic and diluted weighted average shares outstanding were as follows (in thousands): Three Months Ended Nine Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Basic weighted average shares outstanding 286,452 288,374 287,136 288,130 Dilutive effect of stock options and restricted stock/RSUs* 775 2,518 927 2,704 Diluted weighted average shares outstanding 287,227 290,892 288,063 290,834 * Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the period and, therefore, the effect of including these options would be antidilutive. These options totaled 7,551 and 7,034 for the three- and nine-month periods ended September 27, 2020 , and 5,270 and 4,899 for the three- and nine-month periods ended September 29, 2019 , respectively.

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 27, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Values of Other Financial Assets and Liabilities	The following tables present the fair values of our other financial assets and liabilities on September 27, 2020 , and December 31, 2019 , and the basis for determining their fair values: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets (Liabilities) September 27, 2020 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 6 $ 6 $ — $ 6 $ — Available-for-sale debt securities 138 138 — 138 — Equity securities 55 55 55 — — Other investments 9 9 — — 9 Cash flow hedges 207 207 — 207 — Measured at amortized cost: Short- and long-term debt principal (13,498 ) (14,928 ) — (14,928 ) — December 31, 2019 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 24 $ 24 $ 11 $ 13 $ — Available-for-sale debt securities 129 129 — 129 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges 26 26 — 26 — Measured at amortized cost: Short- and long-term debt principal (12,005 ) (12,339 ) — (12,339 ) —

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 27, 2020
Income Tax Disclosure [Abstract]
Net Deferred Tax Assets and Liabilities	Our net deferred tax liability consisted of the following: September 27, 2020 December 31, 2019 Deferred tax asset $ 34 $ 33 Deferred tax liability (462 ) (481 ) Net deferred tax liability $ (428 ) $ (448 )

Unbilled Receivables (Tables)

Unbilled Receivables (Tables)	9 Months Ended
	Sep. 27, 2020
Contractors [Abstract]
Schedule of Unbilled Receivables	Unbilled receivables consisted of the following: September 27, 2020 December 31, 2019 Unbilled revenue $ 33,244 $ 33,481 Advances and progress billings (25,101 ) (25,624 ) Net unbilled receivables $ 8,143 $ 7,857

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 27, 2020
Inventory Disclosure [Abstract]
Schedule Of Inventories	Inventories consisted of the following: September 27, 2020 December 31, 2019 Work in process $ 4,550 $ 4,419 Raw materials 1,769 1,733 Finished goods 24 30 Pre-owned aircraft 59 124 Total inventories $ 6,402 $ 6,306

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 27, 2020
Debt Disclosure [Abstract]
Schedule Of Debt	Debt consisted of the following: September 27, 2020 December 31, 2019 Fixed-rate notes due: Interest rate: May 2020 2.875% $ — $ 2,000 May 2021 3.000% 2,000 2,000 July 2021 3.875% 500 500 November 2022 2.250% 1,000 1,000 May 2023 3.375% 750 750 August 2023 1.875% 500 500 November 2024 2.375% 500 500 April 2025 3.250% 750 — May 2025 3.500% 750 750 August 2026 2.125% 500 500 April 2027 3.500% 750 — November 2027 2.625% 500 500 May 2028 3.750% 1,000 1,000 April 2030 3.625% 1,000 — April 2040 4.250% 750 — November 2042 3.600% 500 500 April 2050 4.250% 750 — Floating-rate notes due: May 2020 3-month LIBOR + 0.29% — 500 May 2021 3-month LIBOR + 0.38% 500 500 Other Various 498 505 Total debt principal 13,498 12,005 Less unamortized debt issuance costs and discounts 126 75 Total debt 13,372 11,930 Less current portion 3,394 2,920 Long-term debt $ 9,978 $ 9,010

Other Liabilities (Tables)

Other Liabilities (Tables)	9 Months Ended
	Sep. 27, 2020
Other Liabilities Disclosure [Abstract]
Summary Of Significant Other Liabilities By Balance Sheet Caption	A summary of significant other liabilities by balance sheet caption follows: September 27, 2020 December 31, 2019 Salaries and wages $ 1,064 $ 941 Workers’ compensation 316 306 Retirement benefits 292 296 Operating lease liabilities 268 252 Fair value of cash flow hedges 100 32 Other (a) 1,987 1,744 Total other current liabilities $ 4,027 $ 3,571 Retirement benefits $ 4,868 $ 5,172 Operating lease liabilities 1,151 1,251 Customer deposits on commercial contracts 865 709 Deferred income taxes 462 481 Other (b) 2,098 1,840 Total other liabilities $ 9,444 $ 9,453 (a) Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace segment, liabilities of discontinued operations, finance lease liabilities and insurance-related costs. (b) Consists primarily of warranty reserves, workers’ compensation liabilities, finance lease liabilities and liabilities of discontinued operations.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 27, 2020
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The changes, pretax and net of tax, in each component of accumulated other comprehensive loss (AOCL) consisted of the following: Gains /(Losses) on Cash Flow Hedges Foreign Currency Translation Adjustments Changes in Retirement Plans’ Funded Status AOCL December 31, 2019 $ 2 $ 288 $ (4,509 ) $ (4,219 ) Other comprehensive income, pretax 181 60 218 459 Provision for income tax, net (49 ) — (46 ) (95 ) Other comprehensive income, net of tax 132 60 172 364 September 27, 2020 $ 134 $ 348 $ (4,337 ) $ (3,855 ) December 31, 2018 $ (71 ) $ 102 $ (3,809 ) $ (3,778 ) Other comprehensive income, pretax 70 48 188 306 Provision for income tax, net (17 ) — (42 ) (59 ) Other comprehensive income, net of tax 53 48 146 247 September 29, 2019 $ (18 ) $ 150 $ (3,663 ) $ (3,531 )

Commitments And Contingencies (

Commitments And Contingencies (Tables)	9 Months Ended
	Sep. 27, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule Of Changes In Carrying Amount Of Warranty Liabilities	The changes in the carrying amount of warranty liabilities for the nine-month periods ended September 27, 2020 , and September 29, 2019 , were as follows: Nine Months Ended September 27, 2020 September 29, 2019 Beginning balance $ 619 $ 480 Warranty expense 72 84 Payments (72 ) (62 ) Adjustments 39 (14 ) Ending balance $ 658 $ 488

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
	Sep. 27, 2020
Retirement Benefits [Abstract]
Net Periodic Defined-Benefit Pension And Other Post-Retirement Benefit Cost	Net periodic defined-benefit pension and other post-retirement benefit (credit) cost for the three- and nine-month periods ended September 27, 2020 , and September 29, 2019 , consisted of the following: Pension Benefits Other Post-retirement Benefits Three Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Service cost $ 29 $ 28 $ 2 $ 2 Interest cost 123 150 7 9 Expected return on plan assets (234 ) (228 ) (9 ) (9 ) Recognized net actuarial loss (gain) 87 98 — (2 ) Amortization of prior service credit (4 ) (4 ) (1 ) (1 ) Net periodic benefit cost (credit) $ 1 $ 44 $ (1 ) $ (1 ) Nine Months Ended Service cost $ 88 $ 84 $ 7 $ 6 Interest cost 369 450 21 27 Expected return on plan assets (703 ) (684 ) (27 ) (27 ) Recognized net actuarial loss (gain) 246 238 (2 ) (6 ) Amortization of prior service credit (13 ) (13 ) (1 ) (3 ) Net periodic benefit (credit) cost $ (13 ) $ 75 $ (2 ) $ (3 )

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 27, 2020
Segment Reporting [Abstract]
Summary Of Financial Information For Each Of Our Segments	Summary financial information for each of our segments follows: Revenue Operating Earnings Three Months Ended September 27, 2020 September 29, 2019 September 27, 2020 September 29, 2019 Aerospace $ 1,975 $ 2,495 $ 283 $ 393 Combat Systems 1,801 1,740 270 264 Information Technology 2,029 2,071 146 146 Mission Systems 1,221 1,220 168 185 Marine Systems 2,405 2,235 223 209 Corporate — — (6 ) 19 Total $ 9,431 $ 9,761 $ 1,084 $ 1,216 Nine Months Ended Aerospace $ 5,640 $ 6,871 $ 682 $ 1,052 Combat Systems 5,263 5,035 732 712 Information Technology 5,901 6,398 379 456 Mission Systems 3,518 3,655 480 495 Marine Systems 7,122 6,618 607 586 Corporate — — (14 ) 19 Total $ 27,444 $ 28,577 $ 2,866 $ 3,320

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 27, 2020	Jan. 01, 2020
New Accounting Pronouncements
Length of fiscal quarters, weeks		91 days
ASU 2016-13 - Credit Losses (Topic 326)
New Accounting Pronouncements
Cumulative effect of adoption of new accounting pronouncement	[1]		$ 37
ASU 2016-13 - Credit Losses (Topic 326) | Retained Earnings
New Accounting Pronouncements
Cumulative effect of adoption of new accounting pronouncement	[1]		$ 37
[1]	Reflects the cumulative effect of Accounting Standards Update (ASU) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which we adopted on January 1, 2020. See Note A for additional details.

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Property, Plant, and Equipment, Net (Details) - USD ($) $ in Millions	Sep. 27, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
PP&E	$ 10,361	$ 9,761
Accumulated depreciation	(5,498)	(5,286)
PP&E, net	$ 4,863	$ 4,475

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Changes In Carrying Amount of Goodwill by Reporting Unit (Details) $ in Millions	9 Months Ended
	Sep. 27, 2020USD ($)
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 19,677	[1]
Acquisitions	122	[2]
Other	90	[3]
Goodwill, end of period	19,889	[1]
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period	2,831	[1]
Acquisitions	73	[2]
Other	87	[3]
Goodwill, end of period	2,991	[1]
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	2,681	[1]
Acquisitions	49	[2]
Other	(6)	[3]
Goodwill, end of period	2,724	[1]
Information Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	9,700	[1]
Acquisitions	0	[2]
Other	0	[3]
Goodwill, end of period	9,700	[1]
Accumulated impairment losses	536
Mission Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	4,168	[1]
Acquisitions	0	[2]
Other	9	[3]
Goodwill, end of period	4,177	[1]
Accumulated impairment losses	1,300
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	297	[1]
Acquisitions	0	[2]
Other	0	[3]
Goodwill, end of period	$ 297	[1]
[1]	Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively.
[2]	Includes businesses acquired in our Aerospace and Combat Systems segments and adjustments during the purchase price allocation period.
[3]	Consists primarily of adjustments for foreign currency translation.

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions		Sep. 27, 2020	Dec. 31, 2019
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	$ 4,530	$ 4,573
Accumulated Amortization		(2,368)	(2,258)
Net Carrying Amount		2,162	2,315
Contract and program intangible assets
Intangible Assets [Line Items]
Gross Carrying Amount	[1],[2]	3,745	3,776
Accumulated Amortization	[2]	(1,891)	(1,779)
Net Carrying Amount	[2]	1,854	1,997
Trade names and trademarks
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	496	474
Accumulated Amortization		(216)	(195)
Net Carrying Amount		280	279
Technology and software
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	130	164
Accumulated Amortization		(103)	(126)
Net Carrying Amount		27	38
Other intangible assets
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	159	159
Accumulated Amortization		(158)	(158)
Net Carrying Amount		$ 1	$ 1
[1]	Changes in gross carrying amounts consist primarily of adjustments for acquired and divested intangible assets and foreign currency translation.
[2]	Consists of acquired backlog and probable follow-on work and associated customer relationships.

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense of intangibles	$ 65	$ 69	$ 196	$ 209

Revenue - Additional Informatio

Revenue - Additional Information (Details) contract in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020USD ($)contract	Sep. 29, 2019USD ($)	Sep. 27, 2020USD ($)	Sep. 29, 2019USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Number of active contracts | contract	11
Revenue recognized in contract liability balance | $	$ 767	$ 1,100	$ 3,200	$ 4,000
Transferred over Time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, percentage from products and services transferred to customers	77.00%	72.00%	78.00%	74.00%
Transferred at Point in Time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, percentage from products and services transferred to customers	23.00%	28.00%	22.00%	26.00%

Revenue - Remaining Performance

Revenue - Remaining Performance Obligations to be Recognized as Revenue (Details) $ in Billions	Sep. 27, 2020USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-09-28
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligations	$ 81.5
Revenue, remaining performance obligation, percentage recognized	45.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year 3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation, percentage recognized	30.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	2 years

Revenue - Impact of Adjustments

Revenue - Impact of Adjustments in Contract Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 9,431	$ 9,761	$ 27,444	$ 28,577
Operating Earnings	1,084	1,216	2,866	3,320
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	126	95	270	263
Operating Earnings	$ 84	$ 81	$ 169	$ 220
Diluted earnings per share (in dollars per share)	$ 0.23	$ 0.22	$ 0.46	$ 0.60

Revenue - Revenue by Products a

Revenue - Revenue by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Revenue [Line Items]
Revenue	$ 9,431	$ 9,761	$ 27,444	$ 28,577
Aerospace
Revenue [Line Items]
Revenue	1,975	2,495	5,640	6,871
Aerospace | Aircraft manufacturing and completions
Revenue [Line Items]
Revenue	1,546	1,972	4,303	5,304
Aerospace | Aircraft services
Revenue [Line Items]
Revenue	429	523	1,337	1,567
Combat Systems
Revenue [Line Items]
Revenue	1,801	1,740	5,263	5,035
Combat Systems | Military vehicles
Revenue [Line Items]
Revenue	1,179	1,137	3,428	3,361
Combat Systems | Weapons systems, armament and munitions
Revenue [Line Items]
Revenue	496	474	1,444	1,336
Combat Systems | Engineering and other services
Revenue [Line Items]
Revenue	126	129	391	338
Information Technology
Revenue [Line Items]
Revenue	2,029	2,071	5,901	6,398
Information Technology | IT services
Revenue [Line Items]
Revenue	2,029	2,071	5,901	6,398
Mission Systems
Revenue [Line Items]
Revenue	1,221	1,220	3,518	3,655
Mission Systems | C4ISR solutions
Revenue [Line Items]
Revenue	1,221	1,220	3,518	3,655
Marine Systems
Revenue [Line Items]
Revenue	2,405	2,235	7,122	6,618
Marine Systems | Nuclear-powered submarines
Revenue [Line Items]
Revenue	1,704	1,567	4,972	4,482
Marine Systems | Surface ships
Revenue [Line Items]
Revenue	461	402	1,433	1,376
Marine Systems | Repair and other services
Revenue [Line Items]
Revenue	$ 240	$ 266	$ 717	$ 760

Revenue - Revenue by Contract T

Revenue - Revenue by Contract Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Revenue [Line Items]
Revenue	$ 9,431	$ 9,761	$ 27,444	$ 28,577
Fixed-price
Revenue [Line Items]
Revenue	6,514	6,867	18,891	19,865
Cost-reimbursement
Revenue [Line Items]
Revenue	2,318	2,242	6,820	6,705
Time-and-materials
Revenue [Line Items]
Revenue	599	652	1,733	2,007
Aerospace
Revenue [Line Items]
Revenue	1,975	2,495	5,640	6,871
Aerospace | Fixed-price
Revenue [Line Items]
Revenue	1,821	2,306	5,148	6,271
Aerospace | Cost-reimbursement
Revenue [Line Items]
Revenue	0	0	0	0
Aerospace | Time-and-materials
Revenue [Line Items]
Revenue	154	189	492	600
Combat Systems
Revenue [Line Items]
Revenue	1,801	1,740	5,263	5,035
Combat Systems | Fixed-price
Revenue [Line Items]
Revenue	1,552	1,501	4,524	4,344
Combat Systems | Cost-reimbursement
Revenue [Line Items]
Revenue	231	230	690	662
Combat Systems | Time-and-materials
Revenue [Line Items]
Revenue	18	9	49	29
Information Technology
Revenue [Line Items]
Revenue	2,029	2,071	5,901	6,398
Information Technology | Fixed-price
Revenue [Line Items]
Revenue	806	824	2,317	2,620
Information Technology | Cost-reimbursement
Revenue [Line Items]
Revenue	846	838	2,539	2,537
Information Technology | Time-and-materials
Revenue [Line Items]
Revenue	377	409	1,045	1,241
Mission Systems
Revenue [Line Items]
Revenue	1,221	1,220	3,518	3,655
Mission Systems | Fixed-price
Revenue [Line Items]
Revenue	694	719	1,976	2,122
Mission Systems | Cost-reimbursement
Revenue [Line Items]
Revenue	478	458	1,403	1,405
Mission Systems | Time-and-materials
Revenue [Line Items]
Revenue	49	43	139	128
Marine Systems
Revenue [Line Items]
Revenue	2,405	2,235	7,122	6,618
Marine Systems | Fixed-price
Revenue [Line Items]
Revenue	1,641	1,517	4,926	4,508
Marine Systems | Cost-reimbursement
Revenue [Line Items]
Revenue	763	716	2,188	2,101
Marine Systems | Time-and-materials
Revenue [Line Items]
Revenue	$ 1	$ 2	$ 8	$ 9

Revenue - Revenue by Customer (

Revenue - Revenue by Customer (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Revenue [Line Items]
Revenue	$ 9,431	$ 9,761	$ 27,444	$ 28,577
U.S. Government - DoD
Revenue [Line Items]
Revenue	5,139	4,911	15,051	14,525
U.S. Government - Non-DoD
Revenue [Line Items]
Revenue	1,204	1,279	3,543	3,924
U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Revenue	169	134	553	453
Total U.S. government
Revenue [Line Items]
Revenue	6,512	6,324	19,147	18,902
U.S. commercial
Revenue [Line Items]
Revenue	1,280	1,543	3,440	4,332
Non-U.S. government
Revenue [Line Items]
Revenue	878	888	2,502	2,747
Non-U.S. commercial
Revenue [Line Items]
Revenue	761	1,006	2,355	2,596
Aerospace
Revenue [Line Items]
Revenue	1,975	2,495	5,640	6,871
Aerospace | U.S. Government - DoD
Revenue [Line Items]
Revenue	41	87	254	262
Aerospace | U.S. Government - Non-DoD
Revenue [Line Items]
Revenue	0	0	0	0
Aerospace | U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Revenue	23	18	93	47
Aerospace | Total U.S. government
Revenue [Line Items]
Revenue	64	105	347	309
Aerospace | U.S. commercial
Revenue [Line Items]
Revenue	1,123	1,365	2,935	3,820
Aerospace | Non-U.S. government
Revenue [Line Items]
Revenue	59	77	133	284
Aerospace | Non-U.S. commercial
Revenue [Line Items]
Revenue	729	948	2,225	2,458
Combat Systems
Revenue [Line Items]
Revenue	1,801	1,740	5,263	5,035
Combat Systems | U.S. Government - DoD
Revenue [Line Items]
Revenue	942	931	2,760	2,634
Combat Systems | U.S. Government - Non-DoD
Revenue [Line Items]
Revenue	3	3	9	9
Combat Systems | U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Revenue	87	58	275	227
Combat Systems | Total U.S. government
Revenue [Line Items]
Revenue	1,032	992	3,044	2,870
Combat Systems | U.S. commercial
Revenue [Line Items]
Revenue	76	62	217	171
Combat Systems | Non-U.S. government
Revenue [Line Items]
Revenue	678	663	1,959	1,951
Combat Systems | Non-U.S. commercial
Revenue [Line Items]
Revenue	15	23	43	43
Information Technology
Revenue [Line Items]
Revenue	2,029	2,071	5,901	6,398
Information Technology | U.S. Government - DoD
Revenue [Line Items]
Revenue	882	875	2,556	2,725
Information Technology | U.S. Government - Non-DoD
Revenue [Line Items]
Revenue	1,088	1,141	3,196	3,511
Information Technology | U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Revenue	3	3	11	12
Information Technology | Total U.S. government
Revenue [Line Items]
Revenue	1,973	2,019	5,763	6,248
Information Technology | U.S. commercial
Revenue [Line Items]
Revenue	51	52	138	137
Information Technology | Non-U.S. government
Revenue [Line Items]
Revenue	5	0	0	13
Information Technology | Non-U.S. commercial
Revenue [Line Items]
Revenue	0	0	0	0
Mission Systems
Revenue [Line Items]
Revenue	1,221	1,220	3,518	3,655
Mission Systems | U.S. Government - DoD
Revenue [Line Items]
Revenue	941	861	2,599	2,529
Mission Systems | U.S. Government - Non-DoD
Revenue [Line Items]
Revenue	112	135	335	403
Mission Systems | U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Revenue	5	12	23	33
Mission Systems | Total U.S. government
Revenue [Line Items]
Revenue	1,058	1,008	2,957	2,965
Mission Systems | U.S. commercial
Revenue [Line Items]
Revenue	13	33	73	107
Mission Systems | Non-U.S. government
Revenue [Line Items]
Revenue	134	145	403	492
Mission Systems | Non-U.S. commercial
Revenue [Line Items]
Revenue	16	34	85	91
Marine Systems
Revenue [Line Items]
Revenue	2,405	2,235	7,122	6,618
Marine Systems | U.S. Government - DoD
Revenue [Line Items]
Revenue	2,333	2,157	6,882	6,375
Marine Systems | U.S. Government - Non-DoD
Revenue [Line Items]
Revenue	1	0	3	1
Marine Systems | U.S. Government - Foreign Military Sales (FMS)
Revenue [Line Items]
Revenue	51	43	151	134
Marine Systems | Total U.S. government
Revenue [Line Items]
Revenue	2,385	2,200	7,036	6,510
Marine Systems | U.S. commercial
Revenue [Line Items]
Revenue	17	31	77	97
Marine Systems | Non-U.S. government
Revenue [Line Items]
Revenue	2	3	7	7
Marine Systems | Non-U.S. commercial
Revenue [Line Items]
Revenue	$ 1	$ 1	$ 2	$ 4

Earnings Per Share (Details)

Earnings Per Share (Details) - shares shares in Thousands		3 Months Ended		9 Months Ended
		Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Earnings Per Share [Abstract]
Basic weighted average shares outstanding (shares)		286,452	288,374	287,136	288,130
Dilutive effect of stock options and restricted stock/RSUs (shares)	[1]	775	2,518	927	2,704
Diluted weighted average shares outstanding (shares)		287,227	290,892	288,063	290,834
Stock/RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (shares)		7,551	5,270	7,034	4,899
[1]	Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the period and, therefore, the effect of including these options would be antidilutive. These options totaled 7,551 and 7,034 for the three- and nine-month periods ended September 27, 2020 , and 5,270 and 4,899 for the three- and nine-month periods ended September 29, 2019 , respectively.

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Millions	Sep. 27, 2020	Dec. 31, 2019
Carrying Value
Financial assets (liabilities)
Cash and equivalents	$ 6	$ 24
Available-for-sale debt securities	138	129
Equity securities	55	54
Other investments	9	4
Cash flow hedges	207	26
Short- and long-term debt principal	(13,498)	(12,005)
Fair Value
Financial assets (liabilities)
Cash and equivalents	6	24
Available-for-sale debt securities	138	129
Equity securities	55	54
Other investments	9	4
Cash flow hedges	207	26
Short- and long-term debt principal	(14,928)	(12,339)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets (liabilities)
Cash and equivalents	0	11
Available-for-sale debt securities	0	0
Equity securities	55	54
Other investments	0	0
Cash flow hedges	0	0
Short- and long-term debt principal	0	0
Significant Other Observable Inputs (Level 2)
Financial assets (liabilities)
Cash and equivalents	6	13
Available-for-sale debt securities	138	129
Equity securities	0	0
Other investments	0	0
Cash flow hedges	207	26
Short- and long-term debt principal	(14,928)	(12,339)
Significant Unobservable Inputs (Level 3)
Financial assets (liabilities)
Cash and equivalents	0	0
Available-for-sale debt securities	0	0
Equity securities	0	0
Other investments	9	4
Cash flow hedges	0	0
Short- and long-term debt principal	$ 0	$ 0

Income Taxes - Net Deferred Tax

Income Taxes - Net Deferred Tax Liability (Details) - USD ($) $ in Millions	Sep. 27, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred tax asset	$ 34	$ 33
Deferred tax liability	(462)	(481)
Net deferred tax liability	$ (428)	$ (448)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details)	Sep. 27, 2020USD ($)
Income Tax Disclosure [Abstract]
Possible chance of tax position sustained, percentage	50.00%
Amount of unrecorded tax benefit that will vary significantly over the next 12 months	$ 0

Unbilled Receivables (Details)

Unbilled Receivables (Details) - USD ($) $ in Millions	Sep. 27, 2020	Dec. 31, 2019
Contractors [Abstract]
Unbilled revenue	$ 33,244	$ 33,481
Advances and progress billings	(25,101)	(25,624)
Net unbilled receivables	$ 8,143	$ 7,857

Unbilled Receivables - Addition

Unbilled Receivables - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020USD ($)progress_payment	Mar. 29, 2020USD ($)progress_payment	Jun. 28, 2020progress_payment	Sep. 27, 2020USD ($)	Dec. 31, 2019USD ($)
Contracts In Process [Line Items]
Net unbilled receivables				$ 8,143	$ 7,857
Large International Wheel Armored Vehicle | Combat Systems
Contracts In Process [Line Items]
Net unbilled receivables				$ 2,500	$ 2,900
Number of progress payments received | progress_payment	1	1	2
Progress payments received	$ 500	$ 500

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Sep. 27, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Work in process	$ 4,550	$ 4,419
Raw materials	1,769	1,733
Finished goods	24	30
Pre-owned aircraft	59	124
Total inventories	$ 6,402	$ 6,306

Debt (Details)

Debt (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt principal	$ 13,498	$ 12,005
Less unamortized debt issuance costs and discounts	126	75
Total debt	13,372	11,930
Less current portion	3,394	2,920
Long-term debt	9,978	9,010
Fixed Rate Notes Due May 2020
Debt Instrument [Line Items]
Long term debt	$ 0	2,000
Interest rate	2.875%
Fixed Rate Notes Due May 2021
Debt Instrument [Line Items]
Long term debt	$ 2,000	2,000
Interest rate	3.00%
Fixed-Rate Notes Due July 2021
Debt Instrument [Line Items]
Long term debt	$ 500	500
Interest rate	3.875%
Fixed Rate Notes Due November 2022
Debt Instrument [Line Items]
Long term debt	$ 1,000	1,000
Interest rate	2.25%
Fixed Rate Notes Due May 2023
Debt Instrument [Line Items]
Long term debt	$ 750	750
Interest rate	3.375%
Fixed Rate Notes Due August 2023
Debt Instrument [Line Items]
Long term debt	$ 500	500
Interest rate	1.875%
Fixed Rate Notes Due November 2024
Debt Instrument [Line Items]
Long term debt	$ 500	500
Interest rate	2.375%
Fixed Rate Notes Due April 2025
Debt Instrument [Line Items]
Long term debt	$ 750	0
Interest rate	3.25%
Fixed Rate Notes Due May 2025
Debt Instrument [Line Items]
Long term debt	$ 750	750
Interest rate	3.50%
Fixed Rate Notes Due August 2026
Debt Instrument [Line Items]
Long term debt	$ 500	500
Interest rate	2.125%
Fixed Rate Notes Due April 2027
Debt Instrument [Line Items]
Long term debt	$ 750	0
Interest rate	3.50%
Fixed Rate Notes Due November 2027
Debt Instrument [Line Items]
Long term debt	$ 500	500
Interest rate	2.625%
Fixed Rate Notes Due May 2028
Debt Instrument [Line Items]
Long term debt	$ 1,000	1,000
Interest rate	3.75%
Fixed Rate Notes Due April 2030
Debt Instrument [Line Items]
Long term debt	$ 1,000	0
Interest rate	3.625%
Fixed Rate Notes Due April 2040
Debt Instrument [Line Items]
Long term debt	$ 750	0
Interest rate	4.25%
Fixed Rate Notes Due November 2042
Debt Instrument [Line Items]
Long term debt	$ 500	500
Interest rate	3.60%
Fixed Rate Notes Due April 2050
Debt Instrument [Line Items]
Long term debt	$ 750	0
Interest rate	4.25%
Floating Rate Notes Due May 2020 | LIBOR
Debt Instrument [Line Items]
Short-term Debt	$ 0	500
Basis spread on variable rate	0.29%
Floating Rate Notes Due May 2021 | LIBOR
Debt Instrument [Line Items]
Short-term Debt	$ 500	500
Basis spread on variable rate	0.38%
Other
Debt Instrument [Line Items]
Long term debt	$ 498	$ 505
Other Interest rate	Various

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 27, 2020
Debt Instrument [Line Items]
Repayments of fixed-rate and floating-rate notes	$ 2,500,000,000
Commercial paper outstanding		$ 0
Credit facility, maximum borrowing capacity		5,000,000,000
Credit Facility | 364-day Facility Expiring March 2021
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 2,000,000,000
Debt term		364 days
Fixed-rate Notes
Debt Instrument [Line Items]
Debt issued	$ 4,000,000,000
Credit Facility | Multi-year Facility Expiring March 2023
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 2,000,000,000
Credit Facility | Multi-year Facility Expiring March 2025
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 1,000,000,000

Other Liabilities (Details)

Other Liabilities (Details) - USD ($) $ in Millions		Sep. 27, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Salaries and wages		$ 1,064	$ 941
Workers’ compensation		316	306
Retirement benefits		292	296
Operating lease liabilities		268	252
Fair value of cash flow hedges		100	32
Other	[1]	1,987	1,744
Total other current liabilities		4,027	3,571
Retirement benefits		4,868	5,172
Operating lease liabilities		1,151	1,251
Customer deposits on commercial contracts		865	709
Deferred income taxes		462	481
Other	[2]	2,098	1,840
Total other liabilities		$ 9,444	$ 9,453
[1]	Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace segment, liabilities of discontinued operations, finance lease liabilities and insurance-related costs.
[2]	Consists primarily of warranty reserves, workers’ compensation liabilities, finance lease liabilities and liabilities of discontinued operations.

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 27, 2020	Jun. 28, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019	Mar. 04, 2020
Equity [Abstract]
Stock repurchase program, number of shares authorized to be repurchased						10,000,000
Stock repurchased during the period (shares)	0	0		3,400,000	1,100,000
Stock repurchased during the period, value				$ 501	$ 184
Remaining number of shares authorized to be repurchased (shares)	13,000,000			13,000,000
Shares remaining to be repurchased as a percent of total shares outstanding	4.50%			4.50%
Dividends declared per share	$ 1.10		$ 1.02	$ 3.30	$ 3.06
Dividends paid in cash	$ 315		$ 295	$ 925	$ 858

Shareholders' Equity - Changes

Shareholders' Equity - Changes in AOCI (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (4,219)
Other comprehensive income, pretax	459	$ 306
Provision for income tax, net	(95)	(59)
Other comprehensive income, net of tax	364	247
Ending Balance	(3,855)
Gains /(Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	2	(71)
Other comprehensive income, pretax	181	70
Provision for income tax, net	(49)	(17)
Other comprehensive income, net of tax	132	53
Ending Balance	134	(18)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	288	102
Other comprehensive income, pretax	60	48
Provision for income tax, net	0	0
Other comprehensive income, net of tax	60	48
Ending Balance	348	150
Changes in Retirement Plans’ Funded Status
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(4,509)	(3,809)
Other comprehensive income, pretax	218	188
Provision for income tax, net	(46)	(42)
Other comprehensive income, net of tax	172	146
Ending Balance	(4,337)	(3,663)
AOCL
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(4,219)	(3,778)
Ending Balance	$ (3,855)	$ (3,531)

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedging Activities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Average maturity of foreign currency forward contracts, in years	2 years
Cash and equivalents	$ 1,469	$ 902
Marketable securities held in trust	199	207
Notional forward foreign exchange contracts outstanding	$ 10,000	$ 5,000
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Maturity of fixed-income securities, in years	5 years

Commitments And Contingencies -

Commitments And Contingencies - Additional Information (Details) $ in Billions	3 Months Ended
	Sep. 27, 2020USD ($)
Other Commitments [Line Items]
Letters of credit and guarantees	$ 1.2
Aerospace | Maximum
Other Commitments [Line Items]
Period preceding delivery of aircraft to customer fair market value of trade-in aircraft is established, days, maximum	45 days

Commitments And Contingencies_2

Commitments And Contingencies - Product Guarantee (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance	$ 619	$ 480
Warranty expense	72	84
Payments	(72)	(62)
Adjustments	39	(14)
Ending balance	$ 658	$ 488

Retirement Plans (Details)

Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 29	$ 28	$ 88	$ 84
Interest cost	123	150	369	450
Expected return on plan assets	(234)	(228)	(703)	(684)
Recognized net actuarial loss (gain)	87	98	246	238
Amortization of prior service credit	(4)	(4)	(13)	(13)
Net periodic benefit cost (credit)	1	44	(13)	75
Other Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	7	6
Interest cost	7	9	21	27
Expected return on plan assets	(9)	(9)	(27)	(27)
Recognized net actuarial loss (gain)	0	(2)	(2)	(6)
Amortization of prior service credit	(1)	(1)	(1)	(3)
Net periodic benefit cost (credit)	$ (1)	$ (1)	$ (2)	$ (3)

Segment Information - Additiona

Segment Information - Additional Information (Details)	9 Months Ended
	Sep. 27, 2020Segment
Segment Reporting [Abstract]
Number of operating segments	5

Segment Information - Summary o

Segment Information - Summary of Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Segment Reporting Information [Line Items]
Revenue	$ 9,431	$ 9,761	$ 27,444	$ 28,577
Operating Earnings	1,084	1,216	2,866	3,320
Corporate
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Operating Earnings	(6)	19	(14)	19
Aerospace
Segment Reporting Information [Line Items]
Revenue	1,975	2,495	5,640	6,871
Aerospace | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,975	2,495	5,640	6,871
Operating Earnings	283	393	682	1,052
Combat Systems
Segment Reporting Information [Line Items]
Revenue	1,801	1,740	5,263	5,035
Combat Systems | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,801	1,740	5,263	5,035
Operating Earnings	270	264	732	712
Information Technology
Segment Reporting Information [Line Items]
Revenue	2,029	2,071	5,901	6,398
Information Technology | Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,029	2,071	5,901	6,398
Operating Earnings	146	146	379	456
Mission Systems
Segment Reporting Information [Line Items]
Revenue	1,221	1,220	3,518	3,655
Mission Systems | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,221	1,220	3,518	3,655
Operating Earnings	168	185	480	495
Marine Systems
Segment Reporting Information [Line Items]
Revenue	2,405	2,235	7,122	6,618
Marine Systems | Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,405	2,235	7,122	6,618
Operating Earnings	$ 223	$ 209	$ 607	$ 586