Lockheed Martin (LMT) 10-K 28 Jan 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Jan. 22, 2021	Jun. 26, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-11437
Entity Registrant Name	LOCKHEED MARTIN CORPORATION
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	52-1893632
Entity Address, Address Line One	6801 Rockledge Drive,
Entity Address, City or Town	Bethesda,
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20817
City Area Code	301
Local Phone Number	897-6000
Title of 12(b) Security	Common Stock, $1 par value
Trading Symbol	LMT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 99.3
Entity Common Stock, Shares Outstanding		280,103,431
Documents Incorporated by Reference	Portions of Lockheed Martin Corporation’s 2021 Definitive Proxy Statement are incorporated by reference into Part III of this Form 10‑K. The 2021 Definitive Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.
Amendment Flag	false
Document Fiscal Period Focus	FY
Entity Central Index Key	0000936468
Document Fiscal Year Focus	2020

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales
Total net sales	$ 65,398	$ 59,812	$ 53,762
Cost of sales
Total cost of sales	(56,744)	(51,445)	(46,488)
Severance charges	(27)	0	(96)
Gross profit	8,654	8,367	7,274
Other (expense) income, net	(10)	178	60
Operating profit	8,644	8,545	7,334
Interest expense	(591)	(653)	(668)
Other non-operating income (expense), net	182	(651)	(828)
Earnings from continuing operations before income taxes	8,235	7,241	5,838
Income tax expense	(1,347)	(1,011)	(792)
Net earnings from continuing operations	6,888	6,230	5,046
Net loss from discontinued operations	(55)	0	0
Net earnings	$ 6,833	$ 6,230	$ 5,046
Basic
Continuing operations (in dollars per share)	$ 24.60	$ 22.09	$ 17.74
Discontinued operations (in dollars per share)	(0.20)	0	0
Basic earnings per common share (in dollars per share)	24.40	22.09	17.74
Diluted
Continuing operations (in dollars per share)	24.50	21.95	17.59
Discontinued operations (in dollars per share)	(0.20)	0	0
Diluted earnings per common share (in dollars per share)	$ 24.30	$ 21.95	$ 17.59
Products
Net sales
Total net sales	$ 54,928	$ 50,053	$ 45,005
Cost of sales
Total cost of sales	(48,996)	(44,589)	(40,293)
Services
Net sales
Total net sales	10,470	9,759	8,757
Cost of sales
Total cost of sales	(9,371)	(8,731)	(7,738)
Other unallocated, net
Cost of sales
Total cost of sales	$ 1,650	$ 1,875	$ 1,639

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 6,833	$ 6,230	$ 5,046
Postretirement benefit plans
Net other comprehensive loss recognized during the period, net of tax benefit of $292 million in 2020, $586 million in 2019 and $136 million in 2018	(1,067)	(2,182)	(501)
Amounts reclassified from accumulated other comprehensive loss, net of tax expense of $119 million in 2020, $247 million in 2019 and $327 million in 2018	440	908	1,202
Other, net	60	41	(75)
Other comprehensive income (loss), net of tax	(567)	(1,233)	626
Comprehensive income	$ 6,266	$ 4,997	$ 5,672

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Tax benefit on net other comprehensive loss recognized during the period for postretirement benefit plans	$ 292	$ 586	$ 136
Tax expense on amounts reclassified from accumulated other comprehensive loss during the period for postretirement benefit plans	$ 119	$ 247	$ 327

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 3,160	$ 1,514
Receivables, net	1,978	2,337
Contract assets	9,545	9,094
Inventories	3,545	3,619
Other current assets	1,150	531
Total current assets	19,378	17,095
Property, plant and equipment, net	7,213	6,591
Goodwill	10,806	10,604
Intangible assets, net	3,012	3,213
Deferred income taxes	3,475	3,319
Other noncurrent assets	6,826	6,706
Total assets	50,710	47,528
Current liabilities
Accounts payable	880	1,281
Contract liabilities	7,545	7,054
Salaries, benefits and payroll taxes	3,163	2,466
Current maturities of long-term debt	500	1,250
Other current liabilities	1,845	1,921
Total current liabilities	13,933	13,972
Long-term debt, net	11,669	11,404
Accrued pension liabilities	12,874	13,234
Other noncurrent liabilities	6,196	5,747
Total liabilities	44,672	44,357
Stockholders’ equity
Common stock, $1 par value per share	279	280
Additional paid-in capital	221	0
Retained earnings	21,636	18,401
Accumulated other comprehensive loss	(16,121)	(15,554)
Total stockholders’ equity	6,015	3,127
Noncontrolling interests in subsidiary	23	44
Total equity	6,038	3,171
Total liabilities and equity	$ 50,710	$ 47,528

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1	$ 1

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Net earnings	$ 6,833	$ 6,230	$ 5,046
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	1,290	1,189	1,161
Stock-based compensation	221	189	173
Equity method investment impairment	128	0	0
Tax resolution related to former IS&GS business	55	0	0
Deferred income taxes	5	222	(244)
Severance charges	27	0	96
Gain on property sale	0	(51)	0
Changes in assets and liabilities
Receivables, net	359	107	(179)
Contract assets	(451)	378	(1,480)
Inventories	74	(622)	(119)
Accounts payable	(372)	(1,098)	914
Contract liabilities	491	563	(537)
Postretirement benefit plans	(1,197)	81	(3,574)
Income taxes	(19)	(151)	1,077
Other, net	739	274	804
Net cash provided by operating activities	8,183	7,311	3,138
Investing activities
Capital expenditures	(1,766)	(1,484)	(1,278)
Acquisitions of businesses	(282)	0	0
Other, net	38	243	203
Net cash used for investing activities	(2,010)	(1,241)	(1,075)
Financing activities
Repurchases of common stock	(1,100)	(1,200)	(1,492)
Dividends paid	(2,764)	(2,556)	(2,347)
Proceeds from issuance of commercial paper, net	0	0	600
Repayment of commercial paper, net	0	(600)	0
Repayments of current and long-term debt	(1,650)	(900)	(750)
Issuance of long-term debt, net of related costs	1,131	0	0
Other, net	(144)	(72)	(163)
Net cash used for financing activities	(4,527)	(5,328)	(4,152)
Net change in cash and cash equivalents	1,646	742	(2,089)
Cash and cash equivalents at beginning of year	1,514	772	2,861
Cash and cash equivalents at end of year	$ 3,160	$ 1,514	$ 772

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common   Stock	Additional  Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive  Loss	Total Stockholders’ Equity	Noncontrolling Interests in Subsidiary
Beginning Balance at Dec. 31, 2017	$ (776)	$ 284	$ 0	$ 11,405	$ (12,539)	$ (850)	$ 74
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	5,046			5,046		5,046
Other comprehensive loss, net of tax	626				626	626
Repurchases of common stock	(1,492)	(5)	(404)	(1,083)		(1,492)
Dividends declared	(2,342)			(2,342)		(2,342)
Stock-based awards, ESOP activity and other	406	2	404			406
Reclassification of income tax effects from tax reform	0			2,408	(2,408)
Net decrease in noncontrolling interests in subsidiary	(19)						(19)
Ending Balance at Dec. 31, 2018	1,449	281	0	15,434	(14,321)	1,394	55
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	6,230			6,230		6,230
Other comprehensive loss, net of tax	(1,233)				(1,233)	(1,233)
Repurchases of common stock	(1,200)	(4)	(483)	(713)		(1,200)
Dividends declared	(2,550)			(2,550)		(2,550)
Stock-based awards, ESOP activity and other	486	3	483			486
Net decrease in noncontrolling interests in subsidiary	(11)						(11)
Ending Balance at Dec. 31, 2019	3,171	280	0	18,401	(15,554)	3,127	44
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	6,833			6,833		6,833
Other comprehensive loss, net of tax	(567)				(567)	(567)
Repurchases of common stock	(1,100)	(3)	(256)	(841)		(1,100)
Dividends declared	(2,757)			(2,757)		(2,757)
Stock-based awards, ESOP activity and other	479	2	477			479
Net decrease in noncontrolling interests in subsidiary	(21)						(21)
Ending Balance at Dec. 31, 2020	$ 6,038	$ 279	$ 221	$ 21,636	$ (16,121)	$ 6,015	$ 23

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared, per share (in dollars per share)	$ 9.80	$ 9	$ 8.20

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Organization – We are a global security and aerospace company principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. We also provide a broad range of management, engineering, technical, scientific, logistics, system integration and cybersecurity services. We serve both U.S. and international customers with products and services that have defense, civil and commercial applications, with our principal customers being agencies of the U.S. Government. Basis of presentation – Our consolidated financial statements include the accounts of subsidiaries we control and variable interest entities if we are the primary beneficiary. We eliminate intercompany balances and transactions in consolidation. Our receivables, inventories, customer advances and amounts in excess of costs incurred and certain amounts in other current liabilities primarily are attributable to long-term contracts or programs in progress for which the related operating cycles are longer than one year. In accordance with industry practice, we include these items in current assets and current liabilities. Unless otherwise noted, we present all per share amounts cited in these consolidated financial statements on a “per diluted share” basis. Use of estimates – We prepare our consolidated financial statements in conformity with U.S. generally accepted accounting principles (GAAP). In doing so, we are required to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base these estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources. Our actual results may differ materially from these estimates. Significant estimates inherent in the preparation of our consolidated financial statements include, but are not limited to, accounting for sales and cost recognition, postretirement benefit plans, assets for the portion of environmental costs that are probable of future recovery and liabilities, evaluation of goodwill and other assets for impairment, income taxes including deferred income taxes, fair value measurements and contingencies. Revenue Recognition – The majority of our net sales are generated from long-term contracts with the U.S. Government and international customers (including foreign military sales (FMS) contracted through the U.S. Government) for the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. For certain contracts that meet the foregoing requirements, primarily international direct commercial sale contracts, we are required to obtain certain regulatory approvals. In these cases, we recognize revenue when it is probable that we will receive regulatory approvals based upon all known facts and circumstances. We provide our products and services under fixed-price and cost-reimbursable contracts. Under fixed-price contracts, we agree to perform the specified work for a pre-determined price. To the extent our actual costs vary from the estimates upon which the price was negotiated, we will generate more or less profit or could incur a loss. Some fixed-price contracts have a performance-based component under which we may earn incentive payments or incur financial penalties based on our performance. Cost-reimbursable contracts provide for the payment of allowable costs incurred during performance of the contract plus a fee up to a ceiling based on the amount that has been funded. Typically, we enter into three types of cost-reimbursable contracts: cost-plus-award-fee, cost-plus-incentive-fee, and cost-plus-fixed-fee. Cost-plus-award-fee contracts provide for an award fee that varies within specified limits based on the customer’s assessment of our performance against a predetermined set of criteria, such as targets based on cost, quality, technical and schedule criteria. Cost-plus-incentive-fee contracts provide for reimbursement of costs plus a fee, which is adjusted by a formula based on the relationship of total allowable costs to total target costs (i.e., incentive based on cost) or reimbursement of costs plus an incentive to exceed stated performance targets (i.e., incentive based on performance). The fixed-fee in a cost-plus-fixed-fee contract is negotiated at the inception of the contract and that fixed-fee does not vary with actual costs. We assess each contract at its inception to determine whether it should be combined with other contracts. When making this determination, we consider factors such as whether two or more contracts were negotiated and executed at or near the same time or were negotiated with an overall profit objective. If combined, we treat the combined contracts as a single contract for revenue recognition purposes. We evaluate the products or services promised in each contract at inception to determine whether the contract should be accounted for as having one or more performance obligations. The products and services in our contracts are typically not distinct from one another due to their complex relationships and the significant contract management functions required to perform under the contract. Accordingly, our contracts are typically accounted for as one performance obligation. In limited cases, our contracts have more than one distinct performance obligation, which occurs when we perform activities that are not highly complex or interrelated or involve different product lifecycles. Significant judgment is required in determining performance obligations, and these decisions could change the amount of revenue and profit recorded in a given period. We classify net sales as products or services on our consolidated statements of earnings based on the predominant attributes of the performance obligations. We determine the transaction price for each contract based on the consideration we expect to receive for the products or services being provided under the contract. For contracts where a portion of the price may vary, we estimate variable consideration at the most likely amount, which is included in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur. We analyze the risk of a significant revenue reversal and if necessary constrain the amount of variable consideration recognized in order to mitigate this risk. At the inception of a contract we estimate the transaction price based on our current rights and do not contemplate future modifications (including unexercised options) or follow-on contracts until they become legally enforceable. Contracts are often subsequently modified to include changes in specifications, requirements or price, which may create new or change existing enforceable rights and obligations. Depending on the nature of the modification, we consider whether to account for the modification as an adjustment to the existing contract or as a separate contract. Generally, modifications to our contracts are not distinct from the existing contract due to the significant integration and interrelated tasks provided in the context of the contract. Therefore, such modifications are accounted for as if they were part of the existing contract and recognized as a cumulative adjustment to revenue. For contracts with multiple performance obligations, we allocate the transaction price to each performance obligation based on the estimated standalone selling price of the product or service underlying each performance obligation. The standalone selling price represents the amount we would sell the product or service to a customer on a standalone basis (i.e., not bundled with any other products or services). Our contracts with the U.S. Government, including FMS contracts, are subject to the Federal Acquisition Regulations (FAR) and the price is typically based on estimated or actual costs plus a reasonable profit margin. As a result of these regulations, the standalone selling price of products or services in our contracts with the U.S. Government and FMS contracts are typically equal to the selling price stated in the contract. For non-U.S. Government contracts with multiple performance obligations, we evaluate whether the stated selling prices for the products or services represent their standalone selling prices. We primarily sell customized solutions unique to a customer’s specifications. When it is necessary to allocate the transaction price to multiple performance obligations, we typically use the expected cost plus a reasonable profit margin to estimate the standalone selling price of each product or service. We occasionally sell standard products or services with observable standalone sales transactions. In these situations, the observable standalone sales transactions are used to determine the standalone selling price. We recognize revenue as performance obligations are satisfied and the customer obtains control of the products and services. In determining when performance obligations are satisfied, we consider factors such as contract terms, payment terms and whether there is an alternative future use of the product or service. Substantially all of our revenue is recognized over time as we perform under the contract because control of the work in process transfers continuously to the customer. For most contracts with the U.S. Government and FMS contracts, this continuous transfer of control of the work in process to the customer is supported by clauses in the contract that give the customer ownership of work in process and allow the customer to unilaterally terminate the contract for convenience and pay us for costs incurred plus a reasonable profit. For most non-U.S. Government contracts, primarily international direct commercial contracts, continuous transfer of control to our customer is supported because we deliver products that do not have an alternative use to us and if our customer were to terminate the contract for reasons other than our non-performance we would have the right to recover damages which would include, among other potential damages, the right to payment for our work performed to date plus a reasonable profit. For performance obligations to deliver products with continuous transfer of control to the customer, revenue is recognized based on the extent of progress towards completion of the performance obligation, generally using the percentage-of-completion cost-to-cost measure of progress for our contracts because it best depicts the transfer of control to the customer as we incur costs on our contracts. Under the percentage-of-completion cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs to complete the performance obligation(s). For performance obligations to provide services to the customer, revenue is recognized over time based on costs incurred or the right to invoice method (in situations where the value transferred matches our billing rights) as our customer receives and consumes the benefits. For performance obligations in which control does not continuously transfer to the customer, we recognize revenue at the point in time in which each performance obligation is fully satisfied. This coincides with the point in time the customer obtains control of the product or service, which typically occurs upon customer acceptance or receipt of the product or service, given that we maintain control of the product or service until that point. Backlog (i.e., unfulfilled or remaining performance obligations) represents the sales we expect to recognize for our products and services for which control has not yet transferred to the customer. It is converted into sales in future periods as work is performed or deliveries are made. For our cost-reimbursable and fixed-priced-incentive contracts, the estimated consideration we expect to receive pursuant to the terms of the contract may exceed the contractual award amount. The estimated consideration is determined at the outset of the contract and is continuously reviewed throughout the contract period. In determining the estimated consideration, we consider the risks related to the technical, schedule and cost impacts to complete the contract and an estimate of any variable consideration. Periodically, we review these risks and may increase or decrease backlog accordingly. As the risks on such contracts are successfully retired, the estimated consideration from customers may be reduced, resulting in a reduction of backlog without a corresponding recognition of sales. As of December 31, 2020, our ending backlog was $147.1 billion. We expect to recognize approximately 39% of our backlog over the next 12 months and approximately 61% over the next 24 months as revenue, with the remainder recognized thereafter. For arrangements with the U.S. Government and FMS contracts, we generally do not begin work on contracts until funding is appropriated by the customer. Billing timetables and payment terms on our contracts vary based on a number of factors, including the contract type. Typical payment terms under fixed-price contracts with the U.S. Government provide that the customer pays either performance-based payments (PBPs) based on the achievement of contract milestones or progress payments based on a percentage of costs we incur. For the majority of our international direct commercial contracts to deliver complex systems, we typically receive advance payments prior to commencement of work, as well as milestone payments that are paid in accordance with the terms of our contract as we perform. We recognize a liability for payments in excess of revenue recognized, which is presented as a contract liability on the balance sheet. The portion of payments retained by the customer until final contract settlement is not considered a significant financing component because the intent is to protect the customer from our failure to adequately complete some or all of the obligations under the contract. Payments received from customers in advance of revenue recognition are not considered to be significant financing components because they are used to meet working capital demands that can be higher in the early stages of a contract. For fixed-price and cost-reimbursable contracts, we present revenues recognized in excess of billings as contract assets on the balance sheet. Amounts billed and due from our customers under both contract types are classified as receivables on the balance sheet. Significant estimates and assumptions are made in estimating contract sales and costs, including the profit booking rate. At the outset of a long-term contract, we identify and monitor risks to the achievement of the technical, schedule and cost aspects of the contract, as well as variable consideration, and assess the effects of those risks on our estimates of sales and total costs to complete the contract. The estimates consider the technical requirements (e.g., a newly-developed product versus a mature product), the schedule and associated tasks (e.g., the number and type of milestone events) and costs (e.g., material, labor, subcontractor, overhead, general and administrative and the estimated costs to fulfill our industrial cooperation agreements, sometimes referred to as offset or localization agreements, required under certain contracts with international customers). The initial profit booking rate of each contract considers risks surrounding the ability to achieve the technical requirements, schedule and costs in the initial estimated total costs to complete the contract. Profit booking rates may increase during the performance of the contract if we successfully retire risks surrounding the technical, schedule and cost aspects of the contract, which decreases the estimated total costs to complete the contract or may increase the variable consideration we expect to receive on the contract. Conversely, our profit booking rates may decrease if the estimated total costs to complete the contract increase or our estimates of variable consideration we expect to receive decrease. All of the estimates are subject to change during the performance of the contract and may affect the profit booking rate. When estimates of total costs to be incurred on a contract exceed total estimates of the transaction price, a provision for the entire loss is determined at the contract level and is recorded in the period in which the loss is determined. Comparability of our segment sales, operating profit and operating margin may be impacted favorably or unfavorably by changes in profit booking rates on our contracts for which we recognize revenue over time using the percentage-of-completion cost-to-cost method to measure progress towards completion. Increases in the profit booking rates, typically referred to as risk retirements, usually relate to revisions in the estimated total costs to fulfill the performance obligations that reflect improved conditions on a particular contract. Conversely, conditions on a particular contract may deteriorate, resulting in an increase in the estimated total costs to fulfill the performance obligations and a reduction in the profit booking rate. Increases or decreases in profit booking rates are recognized in the current period and reflect the inception-to-date effect of such changes. Segment operating profit and margin may also be impacted favorably or unfavorably by other items, which may or may not impact sales. Favorable items may include the positive resolution of contractual matters, cost recoveries on severance and restructuring charges, insurance recoveries and gains on sales of assets. Unfavorable items may include the adverse resolution of contractual matters; restructuring charges, except for significant severance actions, which are excluded from segment operating results; reserves for disputes; certain asset impairments; and losses on sales of certain assets. Our consolidated net adjustments not related to volume, including net profit booking rate adjustments and other items, increased segment operating profit by approximately $1.8 billion in 2020 and $1.9 billion in each of 2019 and 2018. These adjustments increased net earnings by approximately $1.5 billion ($5.33, $5.29 and $5.23 per share) in 2020, 2019 and 2018. We recognized net sales from performance obligations satisfied in prior periods of approximately $2.0 billion, $2.2 billion and $2.0 billion in 2020, 2019 and 2018, which primarily relate to changes in profit booking rates that impacted revenue. As previously disclosed, we are responsible for a program to design, develop and construct a ground-based radar at our RMS business segment. The program has experienced performance issues for which we have periodically accrued reserves. As of December 31, 2020, cumulative losses were approximately $250 million on this program. We may continue to experience issues related to customer requirements and our performance under this contract and have to record additional charges. However, based on the losses previously recorded and our current estimate of the sales and costs to complete the program, at this time we do not anticipate that additional losses, if any, would be material to our operating results or financial condition. As previously disclosed, we have a program, EADGE-T, to design, integrate, and install an air missile defense command, control, communications, computers – intelligence (C4I) system for an international customer that has experienced performance issues and for which we have periodically accrued reserves at our RMS business segment. As of December 31, 2020, cumulative losses remained at approximately $260 million. We continue to monitor program requirements and our performance. At this time, we do not anticipate additional charges that would be material to our operating results or financial condition. As previously disclosed, we are responsible for designing, developing and installing an upgraded turret for the Warrior Capability Sustainment Program. As of December 31, 2020, cumulative losses remained at approximately $140 million on this program. We may continue to experience issues related to customer requirements and our performance under this contract and may have to record additional reserves. However, based on the losses already recorded and our current estimate of the sales and costs to complete the program, at this time we do not anticipate that additional losses, if any, would be material to our operating results or financial condition. Research and development and similar costs – We conduct research and development (R&D) activities using our own funds (referred to as company-funded R&D or independent research and development (IR&D)) and under contractual arrangements with our customers (referred to as customer-funded R&D) to enhance existing products and services and to develop future technologies. R&D costs include basic research, applied research, concept formulation studies, design, development, and related test activities. Company-funded R&D costs are allocated to customer contracts as part of the general and administrative overhead costs and generally recoverable on our customer contracts with the U.S. Government. Customer-funded R&D costs are charged directly to the related customer contract. Substantially all R&D costs are charged to cost of sales as incurred. Company-funded R&D costs charged to cost of sales totaled $1.3 billion in each of 2020, 2019 and 2018. Stock-based compensation – Compensation cost related to all share-based payments is measured at the grant date based on the estimated fair value of the award. We generally recognize the compensation cost ratably over a three-year vesting period, net of estimated forfeitures. At each reporting date, the number of shares is adjusted to the number ultimately expected to vest. Income taxes – We calculate our provision for income taxes using the asset and liability method, under which deferred tax assets and liabilities are recognized based on the future tax consequences attributable to temporary differences that exist between the financial statement carrying amount of assets and liabilities and their respective tax bases, as well as from operating loss and tax credit carry-forwards. We measure deferred tax assets and liabilities using enacted tax rates that will apply in the years in which we expect the temporary differences to be recovered or paid. We periodically assess our tax exposures related to periods that are open to examination. Based on the latest available information, we evaluate our tax positions to determine whether the position will more likely than not be sustained upon examination by the Internal Revenue Service (IRS) or other taxing authorities. If we cannot reach a more-likely-than-not determination, no benefit is recorded. If we determine that the tax position is more likely than not to be sustained, we record the largest amount of benefit that is more likely than not to be realized when the tax position is settled. We record interest and penalties related to income taxes as a component of income tax expense on our consolidated statements of earnings. Interest and penalties were not material. Cash and cash equivalents – Cash equivalents include highly liquid instruments with original maturities of 90 days or less. Receivables – Receivables, net represent our unconditional right to consideration under the contract and include amounts billed and currently due from customers. The amounts are stated at their net estimated realizable value. There were no significant impairment losses related to our receivables in 2020, 2019 or 2018. Contract assets – Contract assets include unbilled amounts typically resulting from sales under contracts when the percentage-of-completion cost-to-cost method of revenue recognition is utilized and revenue recognized exceeds the amount billed to the customer. The amounts may not exceed their estimated net realizable value. Contract assets are classified as current based on our contract operating cycle. Inventories – We record inventories at the lower of cost or estimated net realizable value. If events or changes in circumstances indicate that the utility of our inventories have diminished through damage, deterioration, obsolescence, changes in price or other causes, a loss is recognized in the period in which it occurs. We capitalize labor, material, subcontractor and overhead costs as work-in-process for contracts where control has not yet passed to the customer. In addition, we capitalize costs incurred to fulfill a contract in advance of contract award in inventories as work-in-process if we determine that contract award is probable. We determine the costs of other product and supply inventories by using the first-in first-out or average cost methods. Contract liabilities – Contract liabilities include advance payments and billings in excess of revenue recognized. Contract liabilities are classified as current based on our contract operating cycle and reported on a contract-by-contract basis, net of revenue recognized, at the end of each reporting period. Property, plant and equipment – We record property, plant and equipment at cost. We provide for depreciation and amortization on plant and equipment generally using accelerated methods during the first half of the estimated useful lives of the assets and the straight-line method thereafter. The estimated useful lives of our plant and equipment generally range from 10 to 40 years for buildings and five We review the carrying amounts of long-lived assets for impairment if events or changes in the facts and circumstances indicate that their carrying amounts may not be recoverable. We assess impairment by comparing the estimated undiscounted future cash flows of the related asset grouping to its carrying amount. If an asset is determined to be impaired, we recognize an impairment charge in the current period for the difference between the fair value of the asset and its carrying amount. Capitalized software – We capitalize certain costs associated with the development or purchase of internal-use software. The amounts capitalized are included in other noncurrent assets on our consolidated balance sheets and are amortized on a straight-line basis over the estimated useful life of the resulting software, which ranges from two Goodwill and Intangible Assets – The assets and liabilities of acquired businesses are recorded under the acquisition method of accounting at their estimated fair values at the date of acquisition. Goodwill represents costs in excess of fair values assigned to the underlying identifiable net assets of acquired businesses. Intangible assets from acquired businesses are recognized at fair value on the acquisition date and consist of customer programs, trademarks, customer relationships, technology and other intangible assets. Customer programs include values assigned to major programs of acquired businesses and represent the aggregate value associated with the customer relationships, contracts, technology and trademarks underlying the associated program and are amortized on a straight-line basis over a period of expected cash flows used to measure fair value, which ranges from nine Our goodwill balance was $10.8 billion at December 31, 2020 and $10.6 billion at December 31, 2019. We perform an impairment test of our goodwill at least annually in the fourth quarter or more frequently whenever events or changes in circumstances indicate the carrying value of goodwill may be impaired. Such events or changes in circumstances may include a significant deterioration in overall economic conditions, changes in the business climate of our industry, a decline in our market capitalization, operating performance indicators, competition, reorganizations of our business, U.S. Government budget restrictions or the disposal of all or a portion of a reporting unit. Our goodwill has been allocated to and is tested for impairment at a level referred to as the reporting unit, which is our business segment level or a level below the business segment. The level at which we test goodwill for impairment requires us to determine whether the operations below the business segment constitute a self-sustaining business for which discrete financial information is available and segment management regularly reviews the operating results. We may use either a qualitative or quantitative approach when testing a reporting unit’s goodwill for impairment. For selected reporting units where we use the qualitative approach, we perform a qualitative evaluation of events and circumstances impacting the reporting unit to determine the likelihood of goodwill impairment. Based on that qualitative evaluation, if we determine it is more likely than not that the fair value of a reporting unit exceeds its carrying amount, no further evaluation is necessary. Otherwise we perform a quantitative impairment test. We perform quantitative tests for most reporting units at least once every three years. However, for certain reporting units we may perform a quantitative impairment test every year. For the quantitative impairment test we compare the fair value of a reporting unit to its carrying value, including goodwill. If the fair value of a reporting unit exceeds its carrying value, goodwill of the reporting unit is not impaired. If the carrying value of the reporting unit, including goodwill, exceeds its fair value, a goodwill impairment loss is recognized in an amount equal to that excess. We generally estimate the fair value of each reporting unit using a combination of a discounted cash flow (DCF) analysis and market-based valuation methodologies such as comparable public company trading values and values observed in recent business acquisitions. Determining fair value requires the exercise of significant judgments, including the amount and timing of expected future cash flows, long-term growth rates, discount rates and relevant comparable public company earnings multiples and relevant transaction multiples. The cash flows employed in the DCF analysis are based on our best estimate of future sales, earnings and cash flows after considering factors such as general market conditions, U.S. Government budgets, existing firm orders, expected future orders, contracts with suppliers, labor agreements, changes in working capital, long term business plans and recent operating performance. The discount rates utilized in the DCF analysis are based on the respective reporting unit’s weighted average cost of capital, which takes into account the relative weights of each component of capital structure (equity and debt) and represents the expected cost of new capital, adjusted as appropriate to consider the risk inherent in future cash flows of the respective reporting unit. The carrying value of each reporting unit includes the assets and liabilities employed in its operations, goodwill and allocations of certain assets and liabilities held at the business segment and corporate levels. During the fourth quarters of 2020, 2019 and 2018, we performed our annual goodwill impairment test for each of our reporting units. The results of our annual impairment tests of goodwill indicated that no impairment existed. Acquired intangible assets deemed to have indefinite lives are not amortized, but are subject to annual impairment testing. This testing compares carrying value to fair value and, when appropriate, the carrying value of these assets is reduced to fair value. Finite-lived intangibles are amortized to expense over the applicable useful lives, ranging from three Postretirement benefit plans – Many of our employees are covered by defined benefit pension plans and we provide certain health care and life insurance benefits to eligible retirees (collectively, postretirement benefit plans). GAAP requires that the amounts we record related to our postretirement benefit plans be computed, based on service to date, using actuarial valuations that are based in part on certain key economi

Strategic Action

Strategic Action	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Strategic Action	Strategic ActionOn December 20, 2020, we announced that we entered into an agreement to acquire Aerojet Rocketdyne Holdings, Inc. (Aerojet Rocketdyne) for $56 per share in cash, which is expected to be reduced to $51 per share after Aerojet Rocketdyne pays a pre-closing special dividend to its stockholders on March 24, 2021. This represents a post-dividend equity value of approximately $4.6 billion, on a fully diluted as-converted basis, and a transaction value of approximately $4.4 billion after the assumption of Aerojet Rocketdyne’s projected net cash. We expect to finance the acquisition through a combination of cash on hand and new debt issuances. The transaction is expected to close in the second half of 2021 and is subject to the satisfaction of customary closing conditions, including regulatory approvals and approval by Aerojet Rocketdyne’s stockholders. If the acquisition agreement is terminated under certain circumstances, Aerojet Rocketdyne will be required to pay us a termination fee of $150 million. Our financial results will not include Aerojet Rocketdyne’s results until the acquisition is closed.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The weighted average number of shares outstanding used to compute earnings per common share were as follows (in millions): 2020 2019 2018 Weighted average common shares outstanding for basic computations 280.0 282.0 284.5 Weighted average dilutive effect of equity awards 1.2 1.8 2.3 Weighted average common shares outstanding for diluted computations 281.2 283.8 286.8 We compute basic and diluted earnings per common share by dividing net earnings by the respective weighted average number of common shares outstanding for the periods presented. Our calculation of diluted earnings per common share also includes the dilutive effects for the assumed vesting of outstanding restricted stock units (RSUs), performance stock units (PSUs) and exercise of outstanding stock options based on the treasury stock method. There were no significant anti-dilutive equity awards for the years ended December 31, 2020, 2019 and 2018.

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangibles	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquired Intangibles	Goodwill and Acquired Intangibles Changes in the carrying amount of goodwill by segment were as follows (in millions): Aeronautics MFC RMS Space Total Balance at December 31, 2018 $ 171 $ 2,262 $ 6,751 $ 1,585 $ 10,769 Distributed Energy Solutions divestiture — (175) — — (175) Other — 2 7 1 10 Balance at December 31, 2019 171 2,089 6,758 1,586 10,604 Acquisitions 16 — — 173 189 Other — 2 10 1 13 Balance at December 31, 2020 $ 187 $ 2,091 $ 6,768 $ 1,760 $ 10,806 The gross carrying amounts and accumulated amortization of our acquired intangible assets consisted of the following (in millions): 2020 2019 Gross Accumulated Net Gross Accumulated Net Finite-Lived: Customer programs $ 3,184 $ (1,199) $ 1,985 $ 3,184 $ (967) $ 2,217 Customer relationships 366 (287) 79 344 (243) 101 Other 85 (24) 61 53 (45) 8 Total finite-lived intangibles 3,635 (1,510) 2,125 3,581 (1,255) 2,326 Indefinite-Lived: Trademark 887 — 887 887 — 887 Total acquired intangibles $ 4,522 $ (1,510) $ 3,012 $ 4,468 $ (1,255) $ 3,213 Acquired finite-lived intangible assets are amortized to expense primarily on a straight-line basis over the following estimated useful lives: customer programs, from nine four three Amortization expense for acquired finite-lived intangible assets was $271 million, $284 million and $296 million in 2020, 2019 and 2018. Estimated future amortization expense is as follows: $290 million in 2021; $252 million in 2022; $249 million in 2023; $245 million in 2024; $223 million in 2025 and $866 million thereafter.

Information on Business Segment

Information on Business Segments	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Information on Business Segments	Information on Business Segments We operate in four business segments: Aeronautics, MFC, RMS and Space. We organize our business segments based on the nature of products and services offered. Following is a brief description of the activities of our business segments: • Aeronautics – Engaged in the research, design, development, manufacture, integration, sustainment, support and upgrade of advanced military aircraft, including combat and air mobility aircraft, unmanned air vehicles and related technologies. • Missiles and Fire Control – Provides air and missile defense systems; tactical missiles and air-to-ground precision strike weapon systems; logistics; fire control systems; mission operations support, readiness, engineering support and integration services; manned and unmanned ground vehicles; and energy management solutions. • Rotary and Mission Systems – Designs, manufactures, services and supports various military and commercial helicopters, surface ships, sea and land-based missile defense systems, radar systems, sea and air-based mission and combat systems, command and control mission solutions, cyber solutions, and simulation and training solutions. • Space – Engaged in the research and development, design, engineering and production of satellites, space transportation systems, and strategic, advanced strike, and defensive systems. Space provides network-enabled situational awareness and integrates complex space and ground global systems to help our customers gather, analyze and securely distribute critical intelligence data. Space is also responsible for various classified systems and services in support of vital national security systems. Operating profit for our Space business segment also includes our share of earnings for our 50% ownership interest in ULA, which provides expendable launch services to the U.S. Government. Our investment in ULA totaled $691 million and $709 million at December 31, 2020 and 2019. Net sales of our business segments in the following tables exclude intersegment sales as these activities are eliminated in consolidation. Operating profit of our business segments includes our share of earnings or losses from equity method investees as the operating activities of the equity method investees are closely aligned with the operations of our business segments. ULA, results of which are included in our Space business segment, is our primary equity method investee. Operating profit of our business segments excludes the FAS/CAS operating adjustment for our qualified defined benefit pension plans (described below); the adjustment from CAS to FAS service cost component for all other postretirement benefit plans; expense for stock-based compensation; the effects of items not considered part of management’s evaluation of segment operating performance, such as charges related to significant severance and restructuring actions and goodwill impairments; gains or losses from significant divestitures; the effects of certain legal settlements; corporate costs not allocated to our business segments; and other miscellaneous corporate activities. These items are included in the reconciling item “Unallocated items” between operating profit from our business segments and our consolidated operating profit. See “Note 1 – Significant Accounting Policies” (under the caption “Use of Estimates”) for a discussion related to certain factors that may impact the comparability of net sales and operating profit of our business segments. Our business segments’ results of operations include pension expense only as calculated under U.S. Government Cost Accounting Standards (CAS), which we refer to as CAS pension cost. We recover CAS pension cost through the pricing of our products and services on U.S. Government contracts and, therefore, the CAS pension cost is recognized in each of our business segments’ net sales and cost of sales. Our consolidated operating profit in our consolidated financial statements must present the service cost component of FAS pension and other postretirement benefit plan expense calculated in accordance with FAS requirements under U.S. GAAP. The operating portion of the net FAS/CAS operating adjustment represents the difference between the service cost component of FAS pension expense and the CAS pension cost recorded in our business segments’ results of operations. The non-service FAS pension and other postretirement benefit plan cost component is included in other non-operating expenses, net on our consolidated statement of earnings. Selected Financial Data by Business Segment Summary operating results for each of our business segments were as follows (in millions): 2020 2019 2018 Net sales Aeronautics $ 26,266 $ 23,693 $ 21,242 Missiles and Fire Control 11,257 10,131 8,462 Rotary and Mission Systems 15,995 15,128 14,250 Space 11,880 10,860 9,808 Total net sales $ 65,398 $ 59,812 $ 53,762 Operating profit Aeronautics $ 2,843 $ 2,521 $ 2,272 Missiles and Fire Control 1,545 1,441 1,248 Rotary and Mission Systems 1,615 1,421 1,302 Space 1,149 1,191 1,055 Total business segment operating profit 7,152 6,574 5,877 Unallocated items FAS/CAS operating adjustment (a) 1,876 2,049 1,803 Stock-based compensation (221) (189) (173) Severance and restructuring charges (b) (27) — (96) Other, net (c) (136) 111 (77) Total unallocated, net 1,492 1,971 1,457 Total consolidated operating profit $ 8,644 $ 8,545 $ 7,334 (a) The FAS/CAS operating adjustment represents the difference between the service cost component of FAS pension income (expense) and total pension costs recoverable on U.S. Government contracts as determined in accordance with CAS. For a detail of the FAS/CAS operating adjustment and the total net FAS/CAS pension adjustment, see the table below. (b) See “Note 16 – Severance Charges” discussion for information on charges related to certain severance actions across our organization. (c) Other, net in 2020 includes a non-cash impairment charge of $128 million recognized in the second quarter of 2020 on our investment in the international equity method investee, AMMROC, which decreased net earnings from continuing operations by $96 million. Other, net in 2019 includes a previously deferred non-cash gain of $51 million related to properties sold in 2015 as a result of completing our remaining obligations and a gain of $34 million for the sale of its Distributed Energy Solutions business. Other, net in 2018 includes a non-cash asset impairment charge of $110 million related to our equity method investee, AMMROC (see “Note 1 – Significant Accounting Policies”). Total net FAS/CAS pension adjustments, including the service and non-service cost components of FAS pension income (expense), were as follows (in millions): 2020 2019 2018 Total FAS income (expense) and CAS costs FAS pension income (expense) $ 118 $ (1,093) $ (1,431) Less: CAS pension cost 1,977 2,565 2,433 Net FAS/CAS pension adjustment $ 2,095 $ 1,472 $ 1,002 Service and non-service cost reconciliation FAS pension service cost $ (101) $ (516) $ (630) Less: CAS pension cost 1,977 2,565 2,433 FAS/CAS operating adjustment 1,876 2,049 1,803 Non-operating FAS pension income (expense) 219 (577) (801) Net FAS/CAS pension adjustment $ 2,095 $ 1,472 $ 1,002 We recover CAS pension and other postretirement benefit plan cost through the pricing of our products and services on U.S. Government contracts and, therefore, recognize CAS cost in each of our business segment’s net sales and cost of sales. Our consolidated financial statements must present FAS pension and other postretirement benefit plan expense calculated in accordance with FAS requirements under U.S. GAAP. The operating portion of the net FAS/CAS pension adjustment represents the difference between the service cost component of FAS pension income (expense) and total CAS pension cost. The non-service FAS pension income (expense) component is included in other non-operating income (expense), net in our consolidated statements of earnings. As a result, to the extent that CAS pension cost exceeds the service cost component of FAS pension income (expense), we have a favorable FAS/CAS operating adjustment. 2020 2019 2018 Intersegment sales Aeronautics $ 243 $ 217 $ 120 Missiles and Fire Control 562 515 423 Rotary and Mission Systems 1,903 1,872 1,759 Space 377 352 237 Total intersegment sales $ 3,085 $ 2,956 $ 2,539 Depreciation and amortization Aeronautics $ 348 $ 318 $ 304 Missiles and Fire Control 138 124 105 Rotary and Mission Systems 476 464 458 Space 219 213 229 Total business segment depreciation and amortization 1,181 1,119 1,096 Corporate activities 109 70 65 Total depreciation and amortization $ 1,290 $ 1,189 $ 1,161 Capital expenditures Aeronautics $ 534 $ 526 $ 460 Missiles and Fire Control 391 300 244 Rotary and Mission Systems 311 272 255 Space 403 258 255 Total business segment capital expenditures 1,639 1,356 1,214 Corporate activities 127 128 64 Total capital expenditures $ 1,766 $ 1,484 $ 1,278 Net Sales by Type Net sales by total products and services, contract type, customer category and geographic region for each of our business segments were as follows (in millions): 2020 Aeronautics MFC RMS Space Total Net sales Products $ 22,327 $ 9,804 $ 12,748 $ 10,049 $ 54,928 Services 3,939 1,453 3,247 1,831 10,470 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 Net sales by contract type Fixed-price $ 18,477 $ 7,587 $ 10,795 $ 2,247 $ 39,106 Cost-reimbursable 7,789 3,670 5,200 9,633 26,292 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 Net sales by customer U.S. Government $ 18,175 $ 8,404 $ 11,596 $ 10,293 $ 48,468 International (a) 8,012 2,842 3,986 1,546 16,386 U.S. commercial and other 79 11 413 41 544 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 Net sales by geographic region United States $ 18,254 $ 8,415 $ 12,009 $ 10,334 $ 49,012 Asia Pacific 3,162 280 1,666 68 5,176 Europe 3,283 767 806 1,478 6,334 Middle East 1,344 1,749 847 — 3,940 Other 223 46 667 — 936 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 2019 Aeronautics MFC RMS Space Total Net sales Products $ 20,319 $ 8,424 $ 12,206 $ 9,104 $ 50,053 Services 3,374 1,707 2,922 1,756 9,759 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 Net sales by contract type Fixed-price $ 17,239 $ 6,449 $ 10,382 $ 2,135 $ 36,205 Cost-reimbursable 6,454 3,682 4,746 8,725 23,607 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 Net sales by customer U.S. Government $ 14,776 $ 7,524 $ 10,803 $ 9,322 $ 42,425 International (a) 8,733 2,465 3,822 1,511 16,531 U.S. commercial and other 184 142 503 27 856 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 Net sales by geographic region United States $ 14,960 $ 7,666 $ 11,306 $ 9,349 $ 43,281 Asia Pacific 3,882 420 1,451 73 5,826 Europe 3,224 516 769 1,419 5,928 Middle East 1,465 1,481 979 19 3,944 Other 162 48 623 — 833 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 (a) International sales include FMS contracted through the U.S. Government, direct commercial sales with international governments and commercial and other sales to international customers. 2018 Aeronautics MFC RMS Space Total Net sales Products $ 18,207 $ 6,945 $ 11,714 $ 8,139 $ 45,005 Services 3,035 1,517 2,536 1,669 8,757 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 Net sales by contract type Fixed-price $ 15,719 $ 5,653 $ 9,975 $ 1,892 $ 33,239 Cost-reimbursable 5,523 2,809 4,275 7,916 20,523 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 Net sales by customer U.S. Government $ 13,321 $ 6,088 $ 10,083 $ 8,224 $ 37,716 International (a) 7,735 2,190 3,693 1,538 15,156 U.S. commercial and other 186 184 474 46 890 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 Net sales by geographic region United States $ 13,507 $ 6,272 $ 10,557 $ 8,270 $ 38,606 Asia Pacific 3,335 427 1,433 85 5,280 Europe 2,837 321 829 1,416 5,403 Middle East 1,380 1,404 781 37 3,602 Other 183 38 650 — 871 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 (a) International sales include FMS contracted through the U.S. Government, direct commercial sales with international governments and commercial and other sales to international customers. Our Aeronautics business segment includes our largest program, the F-35 Lightning II Joint Strike Fighter, an international multi-role, multi-variant, stealth fighter aircraft. Net sales for the F-35 program represented approximately 28% of our consolidated net sales during 2020 and 27% during 2019 and 2018. Total assets for each of our business segments were as follows (in millions): 2020 2019 Assets (a) Aeronautics $ 9,903 $ 9,109 Missiles and Fire Control 4,966 5,030 Rotary and Mission Systems 18,035 18,751 Space 6,451 5,844 Total business segment assets 39,355 38,734 Corporate assets (b) 11,355 8,794 Total assets $ 50,710 $ 47,528 (a) We have no long-lived assets with material carrying values located in foreign countries. (b) Corporate assets primarily include cash and cash equivalents, deferred income taxes, assets for the portion of environmental costs that are probable of future recovery and investments held in a separate trust.

Receivables, net, Contract Asse

Receivables, net, Contract Assets and Contract Liabilities	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Receivables, net, Contract Assets and Contract Liabilities	Receivables, net, Contract Assets and Contract Liabilities Receivables, net, contract assets and contract liabilities were as follows (in millions): 2020 2019 Receivables, net $ 1,978 $ 2,337 Contract assets 9,545 9,094 Contract liabilities 7,545 7,054 Receivables, net consist of approximately $1.2 billion from the U.S. Government and $735 million from other governments and commercial customers as of December 31, 2020. Contract assets are net of progress payments and performance based payments from our customers as well as advance payments from non-U.S. Government customers totaling approximately $39.7 billion and $33.0 billion as of December 31, 2020 and 2019. Contract assets increased $451 million during 2020, primarily due to the recognition of revenue related to the satisfaction or partial satisfaction of performance obligations during 2020 for which we have not yet billed our customers. There were no significant impairment losses related to our contract assets during 2020 and 2019. We expect to bill our customers for the majority of the December 31, 2020 contract assets during 2021. Contract liabilities increased $491 million during 2020, primarily due to payments received in excess of revenue recognized on these performance obligations. During 2020, we recognized $4.0 billion of our contract liabilities at December 31, 2019 as revenue. During 2019 and 2018, we recognized $3.9 billion of our contract liabilities at December 31, 2018 and 2017, respectively, as revenue.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following (in millions): 2020 2019 Materials, spares and supplies $ 612 $ 532 Work-in-process 2,693 2,783 Finished goods 240 304 Total inventories $ 3,545 $ 3,619 Costs incurred to fulfill a contract in advance of the contract being awarded are included in inventories as work-in-process if we determine that those costs relate directly to a contract or to an anticipated contract that we can specifically identify and contract award is probable, the costs generate or enhance resources that will be used in satisfying performance obligations, and the costs are recoverable (referred to as pre-contract costs). Pre-contract costs that are initially capitalized in inventory are generally recognized as cost of sales consistent with the transfer of products and services to the customer upon the receipt of the anticipated contract. All other pre-contract costs, including start-up costs, are expensed as incurred. As of December 31, 2020 and 2019, $583 million and $493 million of pre-contract costs were included in inventories.

Property, Plant and Equipment,

Property, Plant and Equipment, net	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, net	Property, Plant and Equipment, net Property, plant and equipment, net consisted of the following (in millions): 2020 2019 Land $ 142 $ 136 Buildings 7,425 7,013 Machinery and equipment 8,661 8,128 Construction in progress 1,921 1,701 Total property, plant and equipment 18,149 16,978 Less: accumulated depreciation and amortization (10,936) (10,387) Total property, plant and equipment, net $ 7,213 $ 6,591

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	Leases We evaluate whether our contractual arrangements contain leases at the inception of such arrangements. Specifically, we consider whether we can control the underlying asset and have the right to obtain substantially all of the economic benefits or outputs from the asset. Substantially all of our leases are long-term operating leases with fixed payment terms. We do not have significant financing leases. Our right-of-use (ROU) operating lease assets represent our right to use an underlying asset for the lease term, and our operating lease liabilities represent our obligation to make lease payments. ROU operating lease assets are recorded in other noncurrent assets in our consolidated balance sheet. Operating lease liabilities are recorded in other current liabilities or other noncurrent liabilities in our consolidated balance sheet based on their contractual due dates. Both the ROU operating lease asset and liability are recognized as of the lease commencement date at the present value of the lease payments over the lease term. Most of our leases do not provide an implicit rate that can readily be determined. Therefore, we use a discount rate based on our incremental borrowing rate, which is determined using our credit rating and information available as of the commencement date. ROU operating lease assets include lease payments made at or before the lease commencement date, net of any lease incentives. Our operating lease agreements may include options to extend the lease term or terminate it early. We include options to extend or terminate leases in the ROU operating lease asset and liability when it is reasonably certain we will exercise these options. Operating lease expense is recognized on a straight-line basis over the lease term and is included in cost of sales on our consolidated statement of earnings. We have operating lease arrangements with lease and non-lease components. The non-lease components in our arrangements are not significant when compared to the lease components. For all operating leases, we account for the lease and non-lease components as a single component. Additionally, for certain equipment leases, we apply a portfolio approach to recognize operating lease ROU assets and liabilities. We evaluate ROU assets for impairment consistent with our property, plant and equipment policy (see Note 1 – Significant Accounting Policies). We generally enter into operating lease agreements for facilities, land and equipment. Our ROU operating lease assets were $1.0 billion at December 31, 2020. Operating lease liabilities were $1.1 billion, of which $841 million were classified as noncurrent We recognized operating lease expense of $223 million, $239 million and $247 million in 2020, 2019 and 2018. In addition, we made cash payments of $210 million for operating leases during 2020, which are included in cash flows from operating activities in our consolidated statement of cash flows. Future minimum lease commitments at December 31, 2020 were as follows (in millions): Total 2021 2022 2023 2024 2025 Thereafter Operating leases $ 1,273 $ 300 $ 199 $ 156 $ 126 $ 89 $ 403 Less: imputed interest $ 158 Total $ 1,115

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our provision for federal and foreign income tax expense for continuing operations consisted of the following (in millions): 2020 2019 2018 Federal income tax expense (benefit): Current Operations $ 1,292 $ 698 $ 975 One-time charge due to tax legislation — — (6) Deferred Operations 21 235 (194) One-time charge due to tax legislation — — (37) Total federal income tax expense 1,313 933 738 Foreign income tax expense (benefit): Current 50 91 67 Deferred (16) (13) (13) Total foreign income tax expense 34 78 54 Total income tax expense $ 1,347 $ 1,011 $ 792 State income taxes are included in our operations as general and administrative costs and, under U.S. Government regulations, are allowable costs in establishing prices for the products and services we sell to the U.S. Government. Therefore, a substantial portion of state income taxes is included in our net sales and cost of sales. As a result, the impact of certain transactions on our operating profit and of other matters presented in these consolidated financial statements is disclosed net of state income taxes. Our total net state income tax expense was $197 million for 2020, $96 million for 2019, and $83 million for 2018. Our reconciliation of the U.S. federal statutory income tax rate of 21.0% to actual income tax expense for continuing operations is as follows (dollars in millions): 2020 2019 2018 Amount Rate Amount Rate Amount Rate Income tax expense at the U.S. federal statutory tax rate $ 1,729 21.0 % $ 1,521 21.0 % $ 1,226 21.0 % Foreign derived intangible income deduction (170) (2.1) (122) (1.7) (61) (1.0) Research and development tax credit (97) (1.2) (148) (2.0) (138) (2.4) Tax deductible dividends (64) (0.8) (62) (0.9) (59) (1.0) Excess tax benefits for share-based payment awards (52) (0.6) (63) (0.9) (55) (0.9) Tax accounting method change (a) — — (15) (0.2) (61) (1.0) Deferred tax write-down and transition tax (b) — — — — (43) (0.7) Other, net (c) 1 0.1 (100) (1.3) (17) (0.4) Income tax expense $ 1,347 16.4 % $ 1,011 14.0 % $ 792 13.6 % (a) Recognized tax benefit of $15 million and $61 million in 2019 and 2018, from our change in a tax accounting method related to restoration of tax basis. (b) Includes a deferred tax re-measurement and transition tax true-up in 2018 primarily due to the re-measurement of certain net deferred tax assets using the lower U.S. corporate income tax rate and a deemed repatriation tax. (c) Includes additional $21 million deduction for foreign derived intangible income related to 2019 recognized in 2020. Includes additional $98 million deduction for foreign derived intangible income related to 2018 recognized in 2019 reflecting proposed tax regulations released on March 4, 2019. We recognized a tax benefit of $191 million in 2020 and $220 million in 2019 from the deduction for foreign derived intangible income enacted by the Tax Cuts and Jobs Act of 2017 (the “Tax Act”). The rate for 2020 benefited from $21 million additional tax deductions for the prior year. The rate for 2019 benefited from $98 million additional tax deductions for 2018, primarily due to proposed tax regulations released on March 4, 2019. We recognized less research and development tax credits in 2020 due to reduced qualifying activity. We receive a tax deduction for dividends paid on shares of our common stock held by certain of our defined contribution plans with an employee stock ownership plan feature. The amount of the tax deduction has increased as we increased our dividend over the last three years, partially offset by a decline in the number of shares in these plans. We participate in the IRS Compliance Assurance Process program. Examinations of the years 2019 and 2020 remain under IRS review. We are also subject to taxation in various states and foreign jurisdictions including Australia, Canada, India, Italy, Japan, Poland, and the United Kingdom. We are under, or may be subject to, audit or examination and additional assessments by the relevant authorities. The primary components of our federal and foreign deferred income tax assets and liabilities at December 31 were as follows (in millions): 2020 2019 Deferred tax assets related to: Accrued compensation and benefits $ 926 $ 659 Pensions 2,994 3,057 Contract accounting methods 392 349 Foreign company operating losses and credits 51 49 Other (a) 509 416 Valuation allowance (b) (13) (28) Deferred tax assets, net 4,859 4,502 Deferred tax liabilities related to: Goodwill and purchased intangibles 363 330 Property, plant and equipment 481 340 Exchanged debt securities and other (a) 547 525 Deferred tax liabilities 1,391 1,195 Net deferred tax assets $ 3,468 $ 3,307 (a) Includes deferred tax assets and liabilities related to lease liability and ROU asset. (b) A valuation allowance was provided against certain foreign company deferred tax assets arising from carryforwards of unused tax benefits. As of December 31, 2020 and 2019, our liabilities associated with unrecognized tax benefits were not material. We and our subsidiaries file federal income tax returns in the U.S. and income tax returns in various foreign jurisdictions. With few exceptions, the statute of limitations for these jurisdictions is no longer open for audit or examination for the years before 2015, other than with respect to refunds.

Debt

Debt	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Debt	Debt Our total debt consisted of the following (in millions): 2020 2019 Notes 2.50% due 2020 $ — $ 1,250 3.35% due 2021 500 900 3.10% due 2023 500 500 2.90% due 2025 750 750 3.55% due 2026 2,000 2,000 1.85% due 2030 400 — 3.60% due 2035 500 500 4.50% and 6.15% due 2036 1,054 1,054 4.07% due 2042 1,336 1,336 3.80% due 2045 1,000 1,000 4.70% due 2046 1,326 1,326 2.80% due 2050 750 — 4.09% due 2052 1,578 1,578 Other notes with rates from 4.85% to 9.13%, due 2022 to 2041 1,605 1,618 Total debt 13,299 13,812 Less: unamortized discounts and issuance costs (1,130) (1,158) Total debt, net 12,169 12,654 Less: current portion (500) (1,250) Long-term debt, net $ 11,669 $ 11,404 Revolving Credit Facilities At December 31, 2020, we had a $2.5 billion revolving credit facility (the credit facility) with various banks that is available for general corporate purposes. Effective August 24, 2019, we extended the expiration date of the credit facility from August 24, 2023 to August 24, 2024. The undrawn portion of the credit facility also serves as a backup facility for the issuance of commercial paper. The total amount outstanding at any point in time under the combination of our commercial paper program and the credit facility cannot exceed the amount of the credit facility. We may request and the banks may grant, at their discretion, an increase in the borrowing capacity under the credit facility of up to an additional $500 million. There were no borrowings outstanding under the credit facility as of December 31, 2020 and 2019. Borrowings under the credit facility are unsecured and bear interest at rates based, at our option, on a Eurodollar Rate or a Base Rate, as defined in the credit facility’s agreement. Each bank’s obligation to make loans under the credit facility is subject to, among other things, our compliance with various representations, warranties and covenants, including covenants limiting our ability and certain of our subsidiaries’ ability to encumber assets and a covenant not to exceed a maximum leverage ratio, as defined in the credit facility agreement. As of December 31, 2020 and 2019, we were in compliance with all covenants contained in the credit facility agreement, as well as in our debt agreements. Long-Term Debt In May 2020, we issued a total of $1.2 billion of senior unsecured notes, consisting of $400 million aggregate principal amount of 1.85% Notes due in 2030 (the “2030 Notes”) and $750 million aggregate principal amount of 2.80% Notes due in 2050 (the “2050 Notes” and, together with the 2030 Notes, the “Notes”). Interest on the Notes is payable semi-annually in arrears on June 15 and December 15 of each year beginning on December 15, 2020. We may, at our option, redeem the Notes of any series in whole or in part at any time and from time to time at a redemption price equal to the greater of 100% of the principal amount of the notes to be redeemed or an applicable “make-whole” amount, plus accrued and unpaid interest to the date of redemption. In June 2020, we used the net proceeds from the offering plus cash on hand to redeem $750 million of the outstanding $1.25 billion in aggregate principal amount of our 2.50% Notes due in 2020, and $400 million of the outstanding $900 million in aggregate principal amount of our 3.35% Notes due in 2021 at their redemption price. In October 2020, we repaid $500 million of long-term notes with a fixed interest rate of 2.50% due November 2020. In November 2019, we repaid $900 million of long-term notes with a fixed interest rate of 4.25% according to their scheduled maturities. We made interest payments of approximately $567 million , $625 million and $635 million during the years ended December 31, 2020, 2019 and 2018, respectively. Short-Term Debt and Commercial Paper As of December 31, 2020, we had $500 million of short-term borrowings due within one year, which are scheduled to mature in September 2021. As of December 31, 2019, we had $1.3 billion of short-term borrowings due within one year, which were scheduled to mature in November 2020. We have agreements in place with financial institutions to provide for the issuance of commercial paper. The outstanding balance of commercial paper can fluctuate daily and the amount outstanding during the period may be greater or less than the amount reported at the end of the period. There were no commercial paper borrowings outstanding as of December 31, 2020 and we did not issue or repay any during 2020. We may, as conditions warrant, continue to issue commercial paper backed by our revolving credit facility to manage the timing of cash flows.

Postretirement Benefit Plans

Postretirement Benefit Plans	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Postretirement Benefit Plans	Postretirement Benefit Plans Defined Benefit Pension Plans and Retiree Medical and Life Insurance Plans Many of our employees are covered by qualified defined benefit pension plans and we provide certain health care and life insurance benefits to eligible retirees (collectively, postretirement benefit plans). We also sponsor nonqualified defined benefit pension plans to provide for benefits in excess of qualified plan limits. Non-union employees hired after December 31, 2005 do not participate in our qualified defined benefit pension plans, but are eligible to participate in a qualified defined contribution plan in addition to our other retirement savings plans. They also have the ability to participate in our retiree medical plans, but we do not subsidize the cost of their participation in those plans as we do with employees hired before January 1, 2006. Over the last few years, we have negotiated similar changes with various labor organizations such that new union represented employees do not participate in our defined benefit pension plans. We completed the final step of the previously announced planned freeze of our qualified and nonqualified defined benefit pension plans for salaried employees effective January 1, 2020. The freeze took effect in two stages. Effective January 1, 2016, the pay-based component of the formula used to determine retirement benefits was frozen. Effective January 1, 2020, the service-based component of the formula was frozen. As a result of these changes, the qualified defined benefit pension plans for salaried employees are fully frozen effective January 1, 2020. With the freeze complete, the majority of our salaried employees participate in an enhanced defined contribution retirement savings plan. The rules related to accounting for postretirement benefit plans under GAAP require us to recognize on a plan-by-plan basis the funded status of our postretirement benefit plans as either an asset or a liability on our consolidated balance sheets. The funded status is measured as the difference between the fair value of the plan’s assets and the benefit obligation of the plan. We use December 31 as the measurement date. Benefit obligations as of the end of each year reflect assumptions in effect as of those dates. Net periodic benefit cost is based on assumptions in effect at the end of the respective preceding year. The net periodic benefit cost (income) recognized for our qualified defined benefit pension plans and our retiree medical and life insurance plans each year included the following (in millions): Qualified Defined Benefit Pension Plans (a) Retiree Medical and 2020 2019 2018 2020 2019 2018 Service cost $ 101 $ 516 $ 630 $ 13 $ 14 $ 19 Interest cost 1,538 1,806 1,740 70 97 91 Expected return on plan assets (2,264) (2,300) (2,395) (127) (110) (135) Recognized net actuarial losses (gains) 849 1,404 1,777 (4) 2 5 Amortization of net prior service (credit) cost (342) (333) (321) 39 42 15 Total net periodic benefit cost (income) $ (118) $ 1,093 $ 1,431 $ (9) $ 45 $ (5) (a) Total net periodic benefit cost (income) associated with our qualified defined benefit plans represents pension expense calculated in accordance with GAAP (FAS pension expense). We are required to calculate pension expense in accordance with both GAAP and CAS rules, each of which results in a different calculated amount of pension expense. The CAS pension cost is recovered through the pricing of our products and services on U.S. Government contracts and, therefore, is recognized in net sales and cost of sales for products and services. We include the difference between FAS pension service cost and CAS pension cost, referred to as the FAS/CAS operating adjustment, as a component of other unallocated, net on our consolidated statements of earnings (see Note 5 – Information on Business Segments). The following table provides a reconciliation of benefit obligations, plan assets and unfunded status related to our qualified defined benefit pension plans and our retiree medical and life insurance plans (in millions): Qualified Defined Retiree Medical and 2020 2019 2020 2019 Change in benefit obligation Beginning balance $ 48,674 $ 43,305 $ 2,226 $ 2,348 Service cost 101 516 13 14 Interest cost 1,538 1,806 70 97 Benefits paid (2,188) (2,294) (220) (229) Settlements (1,392) (1,933) — — Actuarial losses (gains) 5,036 6,403 135 (1) Changes in longevity assumptions (426) 860 (18) (70) Plan amendments and curtailments 9 11 (8) (6) Medicare Part D subsidy — — 3 2 Participants’ contributions — — 70 71 Ending balance $ 51,352 $ 48,674 $ 2,271 $ 2,226 Change in plan assets Beginning balance at fair value $ 35,442 $ 32,002 $ 1,889 $ 1,644 Actual return on plan assets 5,594 6,667 298 342 Benefits paid (2,188) (2,294) (220) (229) Settlements (1,392) (1,933) — — Company contributions 1,025 1,000 45 59 Medicare Part D subsidy — — 3 2 Participants’ contributions — — 70 71 Ending balance at fair value $ 38,481 $ 35,442 $ 2,085 $ 1,889 Unfunded status of the plans $ (12,871) $ (13,232) $ (186) $ (337) During December 2020, Lockheed Martin, through its master retirement trust, purchased an irrevocable group annuity contract from an insurance company (referred to as a buy-out contract) for $1.4 billion to transfer the related, outstanding defined benefit pension obligations. As a result of this transaction, we were relieved of all responsibility for these pension obligations and the insurance company is now required to pay and administer the retirement benefits owed to approximately 13,500 U.S. retirees and beneficiaries, with no change to the amount, timing or form of monthly retirement benefit payments. Although the transaction was treated as a settlement for accounting purposes, we did not recognize a loss on the settlement in earnings associated with the transaction because total settlements during 2020 for the affected pension plans were less than the plans’ service and interest cost in 2020. A second contract was also purchased from an insurance company for $793 million that will reimburse the plan for all future benefit payments related to approximately 2,500 U.S. retirees and beneficiaries (referred to as a buy-in contract). The covered retirees and beneficiaries and buy-in contract were spun-off to the plan established in December 2018 for the contract purchased at that time similarly structured as a buy-in; the buy-in contracts are the sole assets of that plan. Under the arrangement, the plan remains responsible for paying the benefits for the covered retirees and beneficiaries and the insurance company will reimburse the plan as those benefits are paid. As a result, there is no net ongoing cash flow to the plan for the covered retirees and beneficiaries as the cost of providing the benefits is funded by the buy-in contract; effectively locking in the cost of the benefits and eliminating future volatility of the benefit obligation, while also providing the option to convert to a buy-out. The buy-in contract was purchased using assets from the pension trust and is accounted for at fair value as an investment of the trust. These transactions had no impact on our 2020 FAS pension expense or CAS pension cost. Also, during December 2019, Lockheed Martin, through its master retirement trust, purchased a buy-out contract for $1.9 billion related to our outstanding defined benefit pension obligations for approximately 20,000 U.S. retirees and beneficiaries. The following table provides amounts recognized on our consolidated balance sheets related to our qualified defined benefit pension plans and our retiree medical and life insurance plans (in millions): Qualified Defined Retiree Medical and 2020 2019 2020 2019 Prepaid pension asset $ 3 $ 2 $ — $ — Accrued postretirement benefit liabilities (12,874) (13,234) (186) (337) Accumulated other comprehensive loss (pre-tax) related to: Net actuarial losses 21,040 20,609 (119) (69) Prior service (credit) cost (1,235) (1,586) 73 120 Total (a) $ 19,805 $ 19,023 $ (46) $ 51 (a) Accumulated other comprehensive loss related to postretirement benefit plans, after-tax, of $16.2 billion and $15.5 billion at December 31, 2020 and 2019 (see “Note 13 – Stockholders’ Equity”) includes $19.8 billion ($15.6 billion, net of tax) and $19.0 billion ($15.0 billion, net of tax) for qualified defined benefit pension plans, $(46) million ($(37) million, net of tax) and $51 million ($39 million, net of tax) for retiree medical and life insurance plans and $782 million ($617 million, net of tax) and $667 million ($527 million, net of tax) for other plans. The accumulated benefit obligation (ABO) for all qualified defined benefit pension plans was $51.3 billion and $48.6 billion at December 31, 2020 and 2019. The ABO represents benefits accrued without assuming future compensation increases to plan participants and is approximately equal to our projected benefit obligation. Plans where ABO was less than plan assets represent prepaid pension assets, which are included on our consolidated balance sheets in other noncurrent assets. Plans where ABO was in excess of plan assets represent accrued pension liabilities, which are included on our consolidated balance sheets. We also sponsor nonqualified defined benefit plans to provide benefits in excess of qualified plan limits. The aggregate liabilities for these plans at both December 31, 2020 and 2019 were $1.4 billion, which also represent the plans’ unfunded status. We have set aside certain assets totaling $877 million and $657 million as of December 31, 2020 and 2019 in a separate trust which we expect to be used to pay obligations under our nonqualified defined benefit plans. In accordance with GAAP, those assets may not be used to offset the amount of the benefit obligation similar to the postretirement benefit plans in the table above. The unrecognized net actuarial losses at December 31, 2020 and 2019 were $718 million and $641 million . The unrecognized prior service credit at December 31, 2020 and 2019 were $21 million and $34 million . The expense associated with these plans totaled $59 million in 2020, $108 million in 2019 and $123 million in 2018. We also sponsor a small number of other postemployment plans and foreign benefit plans. The aggregate liability for the other postemployment plans was $42 million as of December 31, 2020 and 2019 . The expense for the other postemployment plans, as well as the liability and expense associated with the foreign benefit plans, was not material to our results of operations, financial position or cash flows. The actuarial assumptions used to determine the benefit obligations and expense associated with our nonqualified defined benefit plans and postemployment plans are similar to those assumptions used to determine the benefit obligations and expense related to our qualified defined benefit pension plans and retiree medical and life insurance plans as described below. The following table provides the amounts recognized in other comprehensive income (loss) related to postretirement benefit plans, net of tax, for the years ended December 31, 2020 , 2019 and 2018 (in millions): Incurred but Not Yet Recognition of 2020 2019 2018 2020 2019 2018 Gains (losses) (Gains) losses Actuarial gains and losses Qualified defined benefit pension plans $ (1,005) $ (2,283) $ (570) $ 668 $ 1,104 $ 1,396 Retiree medical and life insurance plans 43 238 71 (3) 2 4 Other plans (104) (133) 83 24 42 55 (1,066) (2,178) (416) 689 1,148 1,455 Credit (cost) (Credit) cost Net prior service credit and cost Qualified defined benefit pension plans (7) (8) (6) (269) (263) (255) Retiree medical and life insurance plans 6 4 (79) 30 33 12 Other plans — — — (10) (10) (10) (1) (4) (85) (249) (240) (253) $ (1,067) $ (2,182) $ (501) $ 440 $ 908 $ 1,202 Actuarial Assumptions The actuarial assumptions used to determine the benefit obligations at December 31 of each year and to determine the net periodic benefit cost for each subsequent year, were as follows: Qualified Defined Benefit Retiree Medical and 2020 2019 2018 2020 2019 2018 Weighted average discount rate 2.500 % 3.250 % 4.250 % 2.375 % 3.250 % 4.250 % Expected long-term rate of return on assets 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % Health care trend rate assumed for next year 7.75 % 8.00 % 8.25 % Ultimate health care trend rate 4.50 % 4.50 % 5.00 % Year that the ultimate health care trend rate is reached 2034 2034 2032 The decrease in the discount rate from December 31, 2019 to December 31, 2020 resulted in an increase in the projected benefit obligations of our qualified defined benefit pension plans of approximately $4.9 billion at December 31, 2020. The decrease in the discount rate from December 31, 2018 to December 31, 2019 resulted in an increase in the projected benefit obligations of our qualified defined benefit pension plans of approximately $5.8 billion at December 31, 2019. In October 2020, the Society of Actuaries published revised longevity assumptions that refined its prior studies. We used the revised assumptions in our December 31, 2020 re-measurement of benefit obligation resulting in an approximate $426 million decrease in the projected benefit obligations of our qualified defined benefit pension plans. The long-term rate of return assumption represents the expected long-term rate of earnings on the funds invested, or to be invested, to provide for the benefits included in the benefit obligations. That assumption is based on several factors including historical market index returns, the anticipated long-term allocation of plan assets, the historical return data for the trust funds, plan expenses and the potential to outperform market index returns. The actual investment return for our qualified defined benefit plans during 2020 of $5.6 billion based on an actual rate of approximately 16.5% improved plan assets more than the $2.3 billion expected return based on our 7.00% long-term rate of return assumption. Plan Assets Investment policies and strategies – Lockheed Martin Investment Management Company (LMIMCo), our wholly-owned subsidiary, has the fiduciary responsibility for making investment decisions related to the assets of our postretirement benefit plans. LMIMCo’s investment objectives for the assets of these plans are (1) to minimize the net present value of expected funding contributions; (2) to ensure there is a high probability that each plan meets or exceeds our actuarial long-term rate of return assumptions; and (3) to diversify assets to minimize the risk of large losses. The nature and duration of benefit obligations, along with assumptions concerning asset class returns and return correlations, are considered when determining an appropriate asset allocation to achieve the investment objectives. Investment policies and strategies governing the assets of the plans are designed to achieve investment objectives within prudent risk parameters. Risk management practices include the use of external investment managers; the maintenance of a portfolio diversified by asset class, investment approach and security holdings; and the maintenance of sufficient liquidity to meet benefit obligations as they come due. LMIMCo’s investment policies require that asset allocations of postretirement benefit plans be maintained within the following approximate ranges: Asset Class Asset Allocation Cash and cash equivalents 0-20% Equity 15-65% Fixed income 10-60% Alternative investments: Private equity funds 0-15% Real estate funds 0-10% Hedge funds 0-20% Commodities 0-15% Fair value measurements – The rules related to accounting for postretirement benefit plans under GAAP require certain fair value disclosures related to postretirement benefit plan assets, even though those assets are not separately presented on our consolidated balance sheets. The following table presents the fair value of the assets (in millions) of our qualified defined benefit pension plans and retiree medical and life insurance plans by asset category and their level within the fair value hierarchy, which has three levels based on the ability to observe inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets, Level 2 refers to fair values estimated using significant other observable inputs and Level 3 includes fair values estimated using significant unobservable inputs. Certain other investments are measured at their Net Asset Value (NAV) per share and do not have readily determined values and are thus not subject to leveling in the fair value hierarchy. The NAV is the total value of the fund divided by the number of the fund’s shares outstanding. We recognize transfers between levels of the fair value hierarchy as of the date of the change in circumstances that causes the transfer. December 31, 2020 December 31, 2019 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Investments measured at fair value Cash and cash equivalents (a) $ 1,109 $ 1,109 $ — $ — $ 1,961 $ 1,961 $ — $ — Equity (a) : U.S. equity securities 7,535 7,467 8 60 7,189 7,182 — 7 International equity securities 6,844 6,836 — 8 7,244 7,217 23 4 Commingled equity funds 1,671 442 1,228 1 1,933 582 1,351 — Fixed income (a) : Corporate debt securities 5,732 — 5,730 2 5,208 — 5,206 2 U.S. Government securities 2,506 — 2,506 — 2,260 — 2,260 — U.S. Government-sponsored enterprise securities 230 — 230 — 530 — 530 — Other fixed income investments (b) 5,873 37 4,063 1,773 3,134 35 2,135 964 Total $ 31,500 $ 15,891 $ 13,765 $ 1,844 $ 29,459 $ 16,977 $ 11,505 $ 977 Investments measured at NAV (c) Commingled equity funds 92 181 Other fixed income investments 541 32 Private equity funds 4,672 4,019 Real estate funds 2,650 2,493 Hedge funds 1,111 1,069 Total investments measured at NAV 9,066 7,794 Receivables, net — 78 Total $ 40,566 $ 37,331 (a) Cash and cash equivalents, equity securities and fixed income securities included derivative assets and liabilities whose fair values were not material as of December 31, 2020 and 2019. LMIMCo’s investment policies restrict the use of derivatives to either establish long or short exposures for purposes consistent with applicable investment mandate guidelines or to hedge risks to the extent of a plan’s current exposure to such risks. Most derivative transactions are settled on a daily basis. (b) Level 3 investments include $1.7 billion at December 31, 2020 and $857 million at December 31, 2019 related to the buy-in contracts discussed above. (c) Certain investments that are valued using the NAV per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy and are included in the table to permit reconciliation of the fair value hierarchy to the aggregate postretirement benefit plan assets. As of December 31, 2020 and 2019, the assets associated with our foreign defined benefit pension plans were not material and have not been included in the table above. Changes in the fair value of plan assets categorized as Level 3 during 2020 and 2019 were insignificant. Valuation techniques – Cash equivalents are mostly comprised of short-term money-market instruments and are valued at cost, which approximates fair value. U.S. equity securities and international equity securities categorized as Level 1 are traded on active national and international exchanges and are valued at their closing prices on the last trading day of the year. For U.S. equity securities and international equity securities not traded on an active exchange, or if the closing price is not available, the trustee obtains indicative quotes from a pricing vendor, broker or investment manager. These securities are categorized as Level 2 if the custodian obtains corroborated quotes from a pricing vendor or categorized as Level 3 if the custodian obtains uncorroborated quotes from a broker or investment manager. Commingled equity funds categorized as Level 1 are traded on active national and international exchanges and are valued at their closing prices on the last trading day of the year. For commingled equity funds not traded on an active exchange, or if the closing price is not available, the trustee obtains indicative quotes from a pricing vendor, broker or investment manager. These securities are categorized as Level 2 if the custodian obtains corroborated quotes from a pricing vendor. Fixed income investments categorized as Level 1 are publicly exchange-traded. Fixed income investments categorized as Level 2 are valued by the trustee using pricing models that use verifiable observable market data (e.g., interest rates and yield curves observable at commonly quoted intervals and credit spreads), bids provided by brokers or dealers or quoted prices of securities with similar characteristics. Fixed income investments are categorized as Level 3 when valuations using observable inputs are unavailable. The trustee typically obtains pricing based on indicative quotes or bid evaluations from vendors, brokers or the investment manager. In addition, certain other fixed income investments categorized as Level 3 are valued using a discounted cash flow approach. Significant inputs include projected annuity payments and the discount rate applied to those payments. Certain commingled equity and fixed income funds, consisting of underlying equity and fixed income securities, respectively, are valued using the NAV practical expedient. The NAV valuations are based on the underlying investments and typically redeemable within 90 days. Private equity funds consist of partnership and co-investment funds. The NAV is based on valuation models of the underlying securities, which includes unobservable inputs that cannot be corroborated using verifiable observable market data. These funds typically have redemption periods between eight Real estate funds consist of partnerships, most of which are closed-end funds, for which the NAV is based on valuation models and periodic appraisals. These funds typically have redemption periods between eight Hedge funds consist of direct hedge funds for which the NAV is generally based on the valuation of the underlying investments. Redemptions in hedge funds are based on the specific terms of each fund, and generally range from a minimum of one month to several months. Contributions and Expected Benefit Payments The required funding of our qualified defined benefit pension plans is determined in accordance with ERISA, as amended by the PPA, and in a manner consistent with CAS and Internal Revenue Code rules. We made contributions to our qualified defined benefit pension plans of $1.0 billion in 2020. We plan to make contributions of approximately $1.0 billion to our qualified defined benefit pension plans in 2021. The following table presents estimated future benefit payments, which reflect expected future employee service, as of December 31, 2020 (in millions): 2021 2022 2023 2024 2025 2026 – 2030 Qualified defined benefit pension plans $ 2,290 $ 2,350 $ 2,440 $ 2,510 $ 2,570 $ 13,190 Retiree medical and life insurance plans 160 150 150 150 150 660 Defined Contribution Plans We maintain a number of defined contribution plans, most with 401(k) features, that cover substantially all of our employees. Under the provisions of our plans, we match most employees’ eligible contributions at rates specified in the plan documents. Our contributions are comprised of (i) company match, the majority of which was funded using our common stock, and (ii) company contributions. Total contributions were $984 million in 2020, $741 million in 2019 and $658 million in 2018. Our defined contribution plans held approximately 30.5 million and 31.9 million shares of our common stock as of December 31, 2020 and 2019.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity At December 31, 2020 and 2019, our authorized capital was composed of 1.5 billion shares of common stock and 50 million shares of series preferred stock. Of the 280 million shares of common stock issued and outstanding as of December 31, 2020, 279 million shares were considered outstanding for consolidated balance sheet presentation purposes; the remaining shares were held in a separate trust. Of the 281 million shares of common stock issued and outstanding as of December 31, 2019, 280 million shares were considered outstanding for consolidated balance sheet presentation purposes; the remaining shares were held in a separate trust. No shares of preferred stock were issued and outstanding at December 31, 2020 or 2019. Repurchases of Common Stock During 2020, we repurchased 3.0 million shares of our common stock for $1.1 billion. During 2019 and 2018, we paid $1.2 billion and $1.5 billion to repurchase 3.5 million and 4.7 million shares of our common stock. During 2020, we entered into an accelerated share repurchase (ASR) agreement to repurchase $500 million of our common stock. We paid $500 million and received 1.4 million shares based on the average price paid per share of $347.16, calculated with reference to the volume-weighted average price (VWAP) of our common stock over the term of the agreement, less a negotiated discount. During 2019, we entered into an ASR agreement to repurchase $350 million of our common stock. We paid $350 million and received 916,249 shares based on the average price paid per share of $381.99, calculated with reference to VWAP of our common stock over the term of the agreement, less a negotiated discount. These ASR transactions were accounted for as equity transactions and recognized as a reduction of common stock and additional paid-in-capital, with the excess purchase price over par value recorded as a reduction of additional paid-in capital. On September 25, 2020, our Board of Directors approved a $1.3 billion increase to our share repurchase program. Inclusive of this increase, the total remaining authorization for future common share repurchases under our program was $3.0 billion as of December 31, 2020. As we repurchase our common shares, we reduce common stock for the $1 of par value of the shares repurchased, with the excess purchase price over par value recorded as a reduction of additional paid-in capital. If additional paid-in capital is reduced to zero, we record the remainder of the excess purchase price over par value as a reduction of retained earnings. During 2020, we repurchased 3.0 million of our common shares, which were recognized as a reduction to common stock for the par value with the excess purchase price recorded as a reduction of additional paid-in capital of $256 million and $841 million recorded as a reduction of retained earnings. In 2019 and 2018, due to the volume of repurchases made under our share repurchase program, additional paid in-capital was reduced to zero, with the remainder of the excess purchase price over par value of $713 million and $1.1 billion recorded as a reduction of retained earnings. Dividends We paid dividends totaling $2.8 billion ($9.80 per share) in 2020, $2.6 billion ($9.00 per share) in 2019 and $2.3 billion ($8.20 per share) in 2018. We paid quarterly dividends of $2.40 per share during each of the first three quarters of 2020 and $2.60 per share during the fourth quarter of 2020; $2.20 per share during each of the first three quarters of 2019 and $2.40 per share during the fourth quarter of 2019; and $2.00 per share during each of the first three quarters of 2018 and $2.20 per share during the fourth quarter of 2018. Accumulated Other Comprehensive Loss Changes in the balance of AOCL, net of income taxes, consisted of the following (in millions): Postretirement Benefit Plans (a) Other, net AOCL Balance at December 31, 2017 $ (12,559) $ 20 $ (12,539) Other comprehensive loss before reclassifications (501) (105) (606) Amounts reclassified from AOCL Recognition of net actuarial losses 1,455 — 1,455 Amortization of net prior service credits (253) — (253) Other — 30 30 Total reclassified from AOCL 1,202 30 1,232 Total other comprehensive (loss) income 701 (75) 626 Reclassification of income tax effects from tax reform (b) (2,396) (12) (2,408) Balance at December 31, 2018 (14,254) (67) (14,321) Other comprehensive loss before reclassifications (2,182) 18 (2,164) Amounts reclassified from AOCL Recognition of net actuarial losses 1,148 — 1,148 Amortization of net prior service credits (240) — (240) Other — 23 23 Total reclassified from AOCL 908 23 931 Total other comprehensive income (loss) (1,274) 41 (1,233) Balance at December 31, 2019 (15,528) (26) (15,554) Other comprehensive income before reclassifications (1,067) 56 (1,011) Amounts reclassified from AOCL Recognition of net actuarial losses 689 — 689 Amortization of net prior service credits (249) — (249) Other — 4 4 Total reclassified from AOCL 440 4 444 Total other comprehensive income (627) 60 (567) Balance at December 31, 2020 $ (16,155) $ 34 $ (16,121) (a) AOCL related to postretirement benefit plans is shown net of tax benefits of $4.4 billion at December 31, 2020, $4.2 billion at December 31, 2019 and $3.9 billion at December 31, 2018. These tax benefits include amounts recognized on our income tax returns as current deductions and deferred income taxes, which will be recognized on our tax returns in future years. See “Note 10 – Income Taxes” and “Note 12 – Postretirement Benefit Plans” for more information on our income taxes and postretirement benefit plans.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation During 2020, 2019 and 2018, we recorded non-cash stock-based compensation expense totaling $221 million, $189 million and $173 million, which is included as a component of other unallocated, net on our consolidated statements of earnings. The net impact to earnings for the respective years was $175 million, $149 million and $137 million. As of December 31, 2020, we had $173 million of unrecognized compensation cost related to nonvested awards, which is expected to be recognized over a weighted average period of 1.8 years. We received cash from the exercise of stock options totaling $41 million, $66 million and $43 million during 2020, 2019 and 2018. In addition, our income tax liabilities for 2020, 2019 and 2018 were reduced by $63 million, $103 million and $75 million due to recognized tax benefits on stock-based compensation arrangements. Stock-Based Compensation Plans Under plans approved by our stockholders, we are authorized to grant key employees stock-based incentive awards, including options to purchase common stock, stock appreciation rights, RSUs, PSUs or other stock units. The exercise price of options to purchase common stock may not be less than the fair market value of our stock on the date of grant. No award of stock options may become fully vested prior to the third anniversary of the grant and no portion of a stock option grant may become vested in less than one year. The minimum vesting period for restricted stock or stock units payable in stock is generally three years. Award agreements may provide for shorter or pro-rated vesting periods or vesting following termination of employment in the case of death, disability, divestiture, retirement, change of control or layoff. The maximum term of a stock option or any other award is 10 years. At December 31, 2020, inclusive of the shares reserved for outstanding stock options, RSUs and PSUs, we had approximately 11 million shares reserved for issuance under the plans. At December 31, 2020, approximately 8 million of the shares reserved for issuance remained available for grant under our stock-based compensation plans. We issue new shares upon the exercise of stock options or when restrictions on RSUs and PSUs have been satisfied. RSUs The following table summarizes activity related to nonvested RSUs: Number Weighted Average Nonvested at December 31, 2017 651 $ 220.21 Granted 406 353.99 Vested (470) 271.50 Forfeited (24) 282.07 Nonvested at December 31, 2018 563 $ 271.23 Granted 581 305.30 Vested (523) 269.00 Forfeited (21) 302.78 Nonvested at December 31, 2019 600 $ 305.06 Granted 533 383.99 Vested (383) 329.63 Forfeited (17) 349.02 Nonvested at December 31, 2020 733 $ 348.60 In 2020, we granted certain employees approximately 0.5 million RSUs with a weighted average grant-date fair value of $383.99 per RSU. The grant-date fair value of these RSUs is equal to the closing market price of our common stock on the grant date less a discount to reflect the delay in payment of dividend-equivalent cash payments that are made only upon vesting, which occurs at least one year from the grant date and most often occurs three years from the grant date. We recognize the grant-date fair value of RSUs, less estimated forfeitures, as compensation expense ratably over the requisite service period, which is shorter than the vesting period if the employee is retirement eligible on the date of grant or will become retirement eligible before the end of the vesting period. PSUs In 2020, we granted certain employees PSUs with an aggregate target award of approximately 0.1 million shares of our common stock. The PSUs generally vest three years from the grant date based on continuous service, with the number of shares earned (0% to 200% of the target award) depending upon the extent to which we achieve certain financial and market performance targets measured over the period from January 1, 2020 through December 31, 2022. About half of the PSUs were valued at a weighted average grant-date fair value of $383.85 per PSU in a manner similar to RSUs mentioned above as the financial targets are based on our operating results. The remaining PSUs were valued at a weighted-average grant-date fair value of $484.50 per PSU using a Monte Carlo model as the performance target is related to our total shareholder return relative to our peer group. We recognize the grant-date fair value of these awards, less estimated forfeitures, as compensation expense ratably over the vesting period.

Legal Proceedings, Commitments

Legal Proceedings, Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings, Commitments and Contingencies	Legal Proceedings, Commitments and Contingencies We are a party to or have property subject to litigation and other proceedings that arise in the ordinary course of our business, including matters arising under provisions relating to the protection of the environment, and are subject to contingencies related to certain businesses we previously owned. These types of matters could result in fines, penalties, cost reimbursements or contributions, compensatory or treble damages or non-monetary sanctions or relief. We believe the probability is remote that the outcome of each of these matters, including the legal proceedings described below, will have a material adverse effect on the corporation as a whole, notwithstanding that the unfavorable resolution of any matter may have a material effect on our net earnings in any particular interim reporting period. Among the factors that we consider in this assessment are the nature of existing legal proceedings and claims, the asserted or possible damages or loss contingency (if estimable), the progress of the case, existing law and precedent, the opinions or views of legal counsel and other advisers, our experience in similar cases and the experience of other companies, the facts available to us at the time of assessment and how we intend to respond to the proceeding or claim. Our assessment of these factors may change over time as individual proceedings or claims progress. Although we cannot predict the outcome of legal or other proceedings with certainty, where there is at least a reasonable possibility that a loss may have been incurred, GAAP requires us to disclose an estimate of the reasonably possible loss or range of loss or make a statement that such an estimate cannot be made. We follow a thorough process in which we seek to estimate the reasonably possible loss or range of loss, and only if we are unable to make such an estimate do we conclude and disclose that an estimate cannot be made. Accordingly, unless otherwise indicated below in our discussion of legal proceedings, a reasonably possible loss or range of loss associated with any individual legal proceeding cannot be estimated. Legal Proceedings As a result of our acquisition of Sikorsky, we assumed the defense of and any potential liability for two civil False Claims Act lawsuits pending in the U.S. District Court for the Eastern District of Wisconsin. In October 2014, the U.S. Government filed a complaint in intervention in the first suit, which was brought by qui tam relator Mary Patzer, a former Derco Aerospace (Derco) employee. In May 2017, the U.S. Government filed a complaint in intervention in the second suit, which was brought by qui tam relator Peter Cimma, a former Sikorsky Support Services, Inc. (SSSI) employee. In November 2017, the Court consolidated the cases into a single action for discovery and trial. The U.S. Government alleges that Sikorsky and two of its wholly-owned subsidiaries, Derco and SSSI, violated the civil False Claims Act and the Truth in Negotiations Act in connection with a contract the U.S. Navy awarded to SSSI in June 2006 to support the Navy’s T-34 and T-44 fixed-wing turboprop training aircraft. SSSI subcontracted with Derco, primarily to procure and manage spare parts for the training aircraft. The U.S. Government contends that SSSI overbilled the Navy on the contract as the result of Derco’s use of prohibited cost-plus-percentage-of-cost pricing to add profit and overhead costs as a percentage of the price of the spare parts that Derco procured and then sold to SSSI. The U.S. Government also alleges that Derco’s claims to SSSI, SSSI’s claims to the Navy, and SSSI’s yearly Certificates of Final Indirect Costs from 2006 through 2012 were false and that SSSI submitted inaccurate cost or pricing data in violation of the Truth in Negotiations Act for a sole-sourced, follow-on “bridge” contract. The U.S. Government’s complaints assert common law claims for breach of contract and unjust enrichment. The U.S. Government further alleged violations of the Anti-Kickback Act and False Claims Act based on a monthly “chargeback,” through which SSSI billed Derco for the cost of certain SSSI personnel, allegedly in exchange for SSSI’s permitting a pricing arrangement that was “highly favorable” to Derco. On January 12, 2018, the Corporation filed a partial motion to dismiss intended to narrow the U.S. Government’s claims, including by seeking dismissal of the Anti-Kickback Act allegations. The Corporation also moved to dismiss Cimma as a party under the False Claims Act’s first-to-file rule, which permits only the first relator to recover in a pending case. The District Court granted these motions, in part, on July 20, 2018, dismissing the Government’s claims under the Anti-Kickback Act and dismissing Cimma as a party to the litigation. The U.S. Government seeks damages of approximately $52 million, subject to trebling, plus statutory penalties. We believe that we have legal and factual defenses to the U.S. Government’s remaining claims. Although we continue to evaluate our liability and exposure, we do not currently believe that it is probable that we will incur a material loss. If, contrary to our expectations, the U.S. Government prevails in this matter and proves damages at or near $52 million and is successful in having such damages trebled, the outcome could have an adverse effect on our results of operations in the period in which a liability is recognized and on our cash flows for the period in which any damages are paid. On February 8, 2019, the Department of Justice (DOJ) filed a complaint in the U.S. District Court for the Eastern District of Washington alleging, among other counts, civil False Claims Act and civil Anti-Kickback Act violations against Mission Support Alliance, LLC (MSA), Lockheed Martin, Lockheed Martin Services, Inc. (LMSI) and a current Lockheed Martin vice president. The dollar amount of damages sought is not specified but DOJ seeks treble damages with respect to the False Claims Act and penalties that are subject to doubling under the Anti-Kickback Act. The allegations relate primarily to information technology services performed by LMSI under a subcontract to MSA and the pricing by MSA and LMSI of those services as well as Lockheed Martin’s payment of standard incentive compensation to certain employees who were seconded to MSA, including the vice president. MSA is a joint venture that holds a prime contract to provide infrastructure support services at DOE’s Hanford facility. On April 23, 2019, the parties each filed partial motions to dismiss the U.S. Government’s False Claims Act and Anti-Kickback Act allegations. On January 13, 2020, the court dismissed the Anti-Kickback Act claim against all defendants with prejudice and denied the motions to dismiss the False Claims Act claims. On August 16, 2016, we divested our former Information Systems & Global Solutions (IS&GS) business segment to Leidos Holdings, Inc. (Leidos) in a transaction that resulted in IS&GS becoming part of Leidos (the Transaction). In the Transaction, Leidos acquired IS&GS’ interest in MSA and the liabilities related to Lockheed Martin’s participation in MSA. Included within the liabilities assumed were those associated with this lawsuit. Lockheed Martin transferred to Leidos a reserve of approximately $38 million established by Lockheed Martin with respect to its potential liability and that of its affiliates and agreed to indemnify Leidos with respect to the liabilities assumed for damages to Leidos for 100% of amounts in excess of this reserve up to $64 million and 50% of amounts in excess of $64 million. We cannot reasonably estimate our exposure at this time, but it is possible that a settlement by or judgment against any of the defendants could implicate Lockheed Martin’s indemnification obligations as described above. At present, in view of what we believe to be the strength of the defenses, our belief that Leidos assumed the liabilities, and our view of the structure of the indemnity, we do not believe it probable that we will incur a material loss and have not taken any reserve. On April 24, 2009, we filed a declaratory judgment action against the New York Metropolitan Transportation Authority and its Capital Construction Company (collectively, the MTA) asking the U.S. District Court for the Southern District of New York to find that the MTA is in material breach of our agreement based on the MTA’s failure to provide access to sites where work must be performed and the customer-furnished equipment necessary to complete the contract. The MTA filed an answer and counterclaim alleging that we breached the contract and subsequently terminated the contract for alleged default. The primary damages sought by the MTA are the costs to complete the contract and potential re-procurement costs. While we are unable to estimate the cost of another contractor to complete the contract and the costs of re-procurement, we note that our contract with the MTA had a total value of $323 million, of which $241 million was paid to us, and that the MTA is seeking damages of approximately $190 million. We dispute the MTA’s allegations and are defending against them. Additionally, following an investigation, our sureties on a performance bond related to this matter, who were represented by independent counsel, concluded that the MTA’s termination of the contract was improper. Finally, our declaratory judgment action was later amended to include claims for monetary damages against the MTA of approximately $95 million. This matter was taken under submission by the District Court in December 2014, after a five-week bench trial and the filing of post-trial pleadings by the parties. We continue to await a decision from the District Court. Although this matter relates to our former IS&GS business, we retained the litigation when we divested IS&GS in 2016. Environmental Matters We are involved in proceedings and potential proceedings relating to soil, sediment, surface water, and groundwater contamination, disposal of hazardous substances, and other environmental matters at several of our current or former facilities, facilities for which we may have contractual responsibility, and at third-party sites where we have been designated as a potentially responsible party (PRP). A substantial portion of environmental costs will be included in our net sales and cost of sales in future periods pursuant to U.S. Government regulations. At the time a liability is recorded for future environmental costs, we record assets for estimated future recovery considered probable through the pricing of products and services to agencies of the U.S. Government, regardless of the contract form (e.g., cost-reimbursable, fixed-price). We continually evaluate the recoverability of our assets for the portion of environmental costs that are probable of future recovery by assessing, among other factors, U.S. Government regulations, our U.S. Government business base and contract mix, our history of receiving reimbursement of such costs, and efforts by some U.S. Government representatives to limit such reimbursement. We include the portions of those environmental costs expected to be allocated to our non-U.S. Government contracts, or determined not to be recoverable under U.S. Government contracts, in our cost of sales at the time the liability is established. At December 31, 2020 and 2019, the aggregate amount of liabilities recorded relative to environmental matters was $789 million and $810 million, most of which are recorded in other noncurrent liabilities on our consolidated balance sheets. We have recorded assets for the portion of environmental costs that are probable of future recovery totaling $685 million and $703 million at December 31, 2020 and 2019, most of which are recorded in other noncurrent assets on our consolidated balance sheets, for the estimated future recovery of these costs, as we consider the recovery probable based on the factors previously mentioned. We project costs and recovery of costs over approximately 20 years. Environmental remediation activities usually span many years, which makes estimating liabilities a matter of judgment because of uncertainties with respect to assessing the extent of the contamination as well as such factors as changing remediation technologies and changing regulatory environmental standards. We are monitoring or investigating a number of former and present operating facilities for potential future remediation. We perform quarterly reviews of the status of our environmental remediation sites and the related liabilities and receivables. Additionally, in our quarterly reviews, we consider these and other factors in estimating the timing and amount of any future costs that may be required for remediation activities, and we record a liability when it is probable that a loss has occurred or will occur for a particular site and the loss can be reasonably estimated. The amount of liability recorded is based on our estimate of the costs to be incurred for remediation for that site. We do not discount the recorded liabilities, as the amount and timing of future cash payments are not fixed or cannot be reliably determined. We cannot reasonably determine the extent of our financial exposure in all cases as, although a loss may be probable or reasonably possible, in some cases it is not possible at this time to estimate the reasonably possible loss or range of loss. We also pursue claims for recovery of costs incurred or for contribution to site remediation costs against other PRPs, including the U.S. Government, and are conducting remediation activities under various consent decrees, orders, and agreements relating to soil, groundwater, sediment, or surface water contamination at certain sites of former or current operations. Under agreements related to certain sites in California, New York, United States Virgin Islands and Washington, the U.S. Government and/or a private party reimburses us an amount equal to a percentage, specific to each site, of expenditures for certain remediation activities in their capacity as PRPs under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). In addition to the proceedings and potential proceedings discussed above, the California State Water Resources Control Board, a branch of the California Environmental Protection Agency, has indicated it will work to re-establish a maximum level of the contaminant hexavalent chromium in drinking water after a prior standard of 10 parts per billion (ppb) was challenged and withdrawn, and is also reevaluating its existing drinking water standard of 6 ppb for perchlorate. The U.S. Environmental Protection Agency decided in June 2020 not to regulate perchlorate in drinking water at the federal level, although this decision has been challenged, and is considering whether to regulate hexavalent chromium. If substantially lower standards are adopted for perchlorate (in California) or for hexavalent chromium (in California or at the federal level), we expect a material increase in our estimates for environmental liabilities and the related assets for the portion of the increased costs that are probable of future recovery in the pricing of our products and services for the U.S. Government. The amount that would be allocable to our non-U.S. Government contracts or that is determined not to be recoverable under U.S. Government contracts would be expensed, which may have a material effect on our earnings in any particular interim reporting period. We also are evaluating the potential impact of existing and contemplated legal requirements addressing a class of compounds known generally as per- and polyfluoroalkyl compounds (PFAS). PFAS compounds have been used ubiquitously, such as in fire-fighting foams, manufacturing processes, and stain- and stick-resistant products (e.g., Teflon, stain-resistant fabrics). Because we have used products and processes over the years containing some of those compounds, they likely exist as contaminants at many of our environmental remediation sites. Governmental authorities have announced plans, and in some instances have begun, to regulate certain of these compounds at extremely low concentrations in drinking water, which could lead to increased cleanup costs at many of our environmental remediation sites. Letters of Credit, Surety Bonds and Third-Party Guarantees We have entered into standby letters of credit and surety bonds issued on our behalf by financial institutions, and we have directly issued guarantees to third parties primarily relating to advances received from customers and the guarantee of future performance on certain contracts. Letters of credit and surety bonds generally are available for draw down in the event we do not perform. In some cases, we may guarantee the contractual performance of third parties such as joint venture partners. We had total outstanding letters of credit, surety bonds and third-party guarantees aggregating $3.4 billion and $3.6 billion at December 31, 2020 and December 31, 2019. Third-party guarantees do not include guarantees issued on behalf of subsidiaries and other consolidated entities. At December 31, 2020 and 2019, third-party guarantees totaled $871 million and $996 million, of which approximately 71% and 76% related to guarantees of contractual performance of joint ventures to which we currently are or previously were a party. These amounts represent our estimate of the maximum amounts we would expect to incur upon the contractual non-performance of the joint venture, joint venture partners or divested businesses. Generally, we also have cross-indemnities in place that may enable us to recover amounts that may be paid on behalf of a joint venture partner. In determining our exposures, we evaluate the reputation, performance on contractual obligations, technical capabilities and credit quality of our current and former joint venture partners and the transferee under novation agreements all of which include a guarantee as required by the FAR. At December 31, 2020 and 2019, there were no material amounts recorded in our financial statements related to third-party guarantees or novation agreements.

Severance Charges

Severance Charges	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Severance Charges	Severance ChargesDuring 2020, we recorded severance charges totaling $27 million ($21 million, or $0.08 per share, after-tax) related to the planned elimination of certain positions primarily at our corporate functions. Upon separation, terminated employees receive lump-sum severance payments primarily based on years of service, the majority of which are expected to be paid over the next several quarters.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following (in millions): December 31, 2020 December 31, 2019 Total Level 1 Level 2 Total Level 1 Level 2 Assets Mutual funds $ 1,335 $ 1,335 $ — $ 1,363 $ 1,363 $ — U.S. Government securities 92 — 92 99 — 99 Other securities 555 341 214 319 171 148 Derivatives 52 — 52 18 — 18 Liabilities Derivatives 22 — 22 23 — 23 Assets measured at NAV Other commingled funds 20 19 Substantially all assets measured at fair value, other than derivatives, represent investments held in a separate trust to fund certain of our non-qualified deferred compensation plans and are recorded in other noncurrent assets on our consolidated balance sheets. The fair values of mutual funds and certain other securities are determined by reference to the quoted market price per unit in active markets multiplied by the number of units held without consideration of transaction costs. The fair values of U.S. Government and other securities are determined using pricing models that use observable inputs (e.g., interest rates and yield curves observable at commonly quoted intervals), bids provided by brokers or dealers or quoted prices of securities with similar characteristics. The fair values of derivative instruments, which consist of foreign currency forward contracts, including embedded derivatives, and interest rate swap contracts, are primarily determined based on the present value of future cash flows using model-derived valuations that use observable inputs such as interest rates, credit spreads and foreign currency exchange rates. In addition to the financial instruments listed in the table above, we hold other financial instruments, including cash and cash equivalents, receivables, accounts payable and debt and commercial paper. The carrying amounts for cash and cash equivalents, receivables and accounts payable approximated their fair values. The estimated fair value of our outstanding debt was $16.9 billion and $15.9 billion at December 31, 2020 and 2019. The outstanding principal amount was $13.3 billion and $13.8 billion at December 31, 2020 and 2019, excluding $1.1 billion and $1.2 billion of unamortized discounts and issuance costs at December 31, 2020 and 2019. The estimated fair values of our outstanding debt were determined based on quoted prices for similar instruments in active markets (Level 2).

Summary of Quarterly Informatio

Summary of Quarterly Information (Unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Information (Unaudited)	Summary of Quarterly Information (Unaudited) A summary of quarterly information is as follows (in millions, except per share data): 2020 Quarters (a) First Second (c) Third (d) Fourth (e) Net sales $ 15,651 $ 16,220 $ 16,495 $ 17,032 Operating profit 2,122 2,086 2,147 2,289 Net earnings from continuing operations 1,717 1,626 1,753 1,792 Net loss from discontinued operations — — (55) — Net earnings 1,717 1,626 1,698 1,792 Earnings per common share from continuing operations (b) : Basic 6.10 5.81 6.28 6.41 Diluted 6.08 5.79 6.25 6.38 Loss per common share from discontinued operations: Basic — — (0.20) — Diluted — — (0.20) — Basic earnings per common share (b) 6.10 5.81 6.08 6.41 Diluted earnings per common share (b) 6.08 5.79 6.05 6.38 2019 Quarters (a) First (f) Second Third (g) Fourth Net sales $ 14,336 $ 14,427 $ 15,171 $ 15,878 Operating profit 2,283 2,008 2,105 2,149 Net earnings 1,704 1,420 1,608 1,498 Basic earnings per common share (b) 6.03 5.03 5.70 5.32 Diluted earnings per common share (b) 5.99 5.00 5.66 5.29 (a) Quarters are typically 13 weeks in length but, due to our fiscal year ending on December 31, the number of weeks in a reporting period may vary slightly during the year and for comparable prior year periods. (b) The sum of the quarterly earnings per share amounts do not equal the earnings per share amounts included on our consolidated statements of earnings. The difference in 2020 and 2019 relates to the timing of our share repurchases. (c) The second quarter of 2020 includes a non-cash impairment charge of $128 million ($96 million, or $0.34 per share, after-tax) related to our equity method investee, AMMROC (see “Note 1 – Significant Accounting Policies”). (d) The third quarter of 2020 includes a $55 million ($0.20 per share) non-cash charge for discontinued operations resulting from the resolution of certain tax matters related to the former IS&GS business divested in 2016. (e) The fourth quarter of 2020 includes $27 million ($21 million, or $0.08 per share, after-tax) of severance charges (see “Note 16 – Severance Charges”). (f) The first quarter of 2019 includes a previously deferred non-cash gain of $51 million ($38 million, or $0.13 per share, after-tax) related to properties sold in 2015 as a result of completing our remaining obligations. The first quarter of 2019 also includes benefits of $75 million, or $0.26 per share, from additional tax deductions, based on proposed tax regulations released on March 4, 2019, which clarified that foreign military sales qualify as foreign derived intangible income. Approximately $65 million, or $0.23 per share, of the total benefit was recorded discretely because it relates to the prior year. (g) The third quarter of 2019 includes benefits of $62 million, or $0.22 per share, for additional tax deductions for the prior year, primarily attributable to foreign derived intangible income treatment based on proposed tax regulations released on March 4, 2019 and our change in tax accounting method.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Organization	Organization – We are a global security and aerospace company principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. We also provide a broad range of management, engineering, technical, scientific, logistics, system integration and cybersecurity services. We serve both U.S. and international customers with products and services that have defense, civil and commercial applications, with our principal customers being agencies of the U.S. Government.
Basis of presentation	Basis of presentation – Our consolidated financial statements include the accounts of subsidiaries we control and variable interest entities if we are the primary beneficiary. We eliminate intercompany balances and transactions in consolidation. Our receivables, inventories, customer advances and amounts in excess of costs incurred and certain amounts in other current liabilities primarily are attributable to long-term contracts or programs in progress for which the related operating cycles are longer than one year. In accordance with industry practice, we include these items in current assets and current liabilities. Unless otherwise noted, we present all per share amounts cited in these consolidated financial statements on a “per diluted share” basis.
Use of estimates	Use of estimates – We prepare our consolidated financial statements in conformity with U.S. generally accepted accounting principles (GAAP). In doing so, we are required to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base these estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources. Our actual results may differ materially from these estimates. Significant estimates inherent in the preparation of our consolidated financial statements include, but are not limited to, accounting for sales and cost recognition, postretirement benefit plans, assets for the portion of environmental costs that are probable of future recovery and liabilities, evaluation of goodwill and other assets for impairment, income taxes including deferred income taxes, fair value measurements and contingencies.
Revenue Recognition, Contract assets and Contract liabilities	Revenue Recognition – The majority of our net sales are generated from long-term contracts with the U.S. Government and international customers (including foreign military sales (FMS) contracted through the U.S. Government) for the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. For certain contracts that meet the foregoing requirements, primarily international direct commercial sale contracts, we are required to obtain certain regulatory approvals. In these cases, we recognize revenue when it is probable that we will receive regulatory approvals based upon all known facts and circumstances. We provide our products and services under fixed-price and cost-reimbursable contracts. Under fixed-price contracts, we agree to perform the specified work for a pre-determined price. To the extent our actual costs vary from the estimates upon which the price was negotiated, we will generate more or less profit or could incur a loss. Some fixed-price contracts have a performance-based component under which we may earn incentive payments or incur financial penalties based on our performance. Cost-reimbursable contracts provide for the payment of allowable costs incurred during performance of the contract plus a fee up to a ceiling based on the amount that has been funded. Typically, we enter into three types of cost-reimbursable contracts: cost-plus-award-fee, cost-plus-incentive-fee, and cost-plus-fixed-fee. Cost-plus-award-fee contracts provide for an award fee that varies within specified limits based on the customer’s assessment of our performance against a predetermined set of criteria, such as targets based on cost, quality, technical and schedule criteria. Cost-plus-incentive-fee contracts provide for reimbursement of costs plus a fee, which is adjusted by a formula based on the relationship of total allowable costs to total target costs (i.e., incentive based on cost) or reimbursement of costs plus an incentive to exceed stated performance targets (i.e., incentive based on performance). The fixed-fee in a cost-plus-fixed-fee contract is negotiated at the inception of the contract and that fixed-fee does not vary with actual costs. We assess each contract at its inception to determine whether it should be combined with other contracts. When making this determination, we consider factors such as whether two or more contracts were negotiated and executed at or near the same time or were negotiated with an overall profit objective. If combined, we treat the combined contracts as a single contract for revenue recognition purposes. We evaluate the products or services promised in each contract at inception to determine whether the contract should be accounted for as having one or more performance obligations. The products and services in our contracts are typically not distinct from one another due to their complex relationships and the significant contract management functions required to perform under the contract. Accordingly, our contracts are typically accounted for as one performance obligation. In limited cases, our contracts have more than one distinct performance obligation, which occurs when we perform activities that are not highly complex or interrelated or involve different product lifecycles. Significant judgment is required in determining performance obligations, and these decisions could change the amount of revenue and profit recorded in a given period. We classify net sales as products or services on our consolidated statements of earnings based on the predominant attributes of the performance obligations. We determine the transaction price for each contract based on the consideration we expect to receive for the products or services being provided under the contract. For contracts where a portion of the price may vary, we estimate variable consideration at the most likely amount, which is included in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur. We analyze the risk of a significant revenue reversal and if necessary constrain the amount of variable consideration recognized in order to mitigate this risk. At the inception of a contract we estimate the transaction price based on our current rights and do not contemplate future modifications (including unexercised options) or follow-on contracts until they become legally enforceable. Contracts are often subsequently modified to include changes in specifications, requirements or price, which may create new or change existing enforceable rights and obligations. Depending on the nature of the modification, we consider whether to account for the modification as an adjustment to the existing contract or as a separate contract. Generally, modifications to our contracts are not distinct from the existing contract due to the significant integration and interrelated tasks provided in the context of the contract. Therefore, such modifications are accounted for as if they were part of the existing contract and recognized as a cumulative adjustment to revenue. For contracts with multiple performance obligations, we allocate the transaction price to each performance obligation based on the estimated standalone selling price of the product or service underlying each performance obligation. The standalone selling price represents the amount we would sell the product or service to a customer on a standalone basis (i.e., not bundled with any other products or services). Our contracts with the U.S. Government, including FMS contracts, are subject to the Federal Acquisition Regulations (FAR) and the price is typically based on estimated or actual costs plus a reasonable profit margin. As a result of these regulations, the standalone selling price of products or services in our contracts with the U.S. Government and FMS contracts are typically equal to the selling price stated in the contract. For non-U.S. Government contracts with multiple performance obligations, we evaluate whether the stated selling prices for the products or services represent their standalone selling prices. We primarily sell customized solutions unique to a customer’s specifications. When it is necessary to allocate the transaction price to multiple performance obligations, we typically use the expected cost plus a reasonable profit margin to estimate the standalone selling price of each product or service. We occasionally sell standard products or services with observable standalone sales transactions. In these situations, the observable standalone sales transactions are used to determine the standalone selling price. We recognize revenue as performance obligations are satisfied and the customer obtains control of the products and services. In determining when performance obligations are satisfied, we consider factors such as contract terms, payment terms and whether there is an alternative future use of the product or service. Substantially all of our revenue is recognized over time as we perform under the contract because control of the work in process transfers continuously to the customer. For most contracts with the U.S. Government and FMS contracts, this continuous transfer of control of the work in process to the customer is supported by clauses in the contract that give the customer ownership of work in process and allow the customer to unilaterally terminate the contract for convenience and pay us for costs incurred plus a reasonable profit. For most non-U.S. Government contracts, primarily international direct commercial contracts, continuous transfer of control to our customer is supported because we deliver products that do not have an alternative use to us and if our customer were to terminate the contract for reasons other than our non-performance we would have the right to recover damages which would include, among other potential damages, the right to payment for our work performed to date plus a reasonable profit. For performance obligations to deliver products with continuous transfer of control to the customer, revenue is recognized based on the extent of progress towards completion of the performance obligation, generally using the percentage-of-completion cost-to-cost measure of progress for our contracts because it best depicts the transfer of control to the customer as we incur costs on our contracts. Under the percentage-of-completion cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs to complete the performance obligation(s). For performance obligations to provide services to the customer, revenue is recognized over time based on costs incurred or the right to invoice method (in situations where the value transferred matches our billing rights) as our customer receives and consumes the benefits. For arrangements with the U.S. Government and FMS contracts, we generally do not begin work on contracts until funding is appropriated by the customer. Billing timetables and payment terms on our contracts vary based on a number of factors, including the contract type. Typical payment terms under fixed-price contracts with the U.S. Government provide that the customer pays either performance-based payments (PBPs) based on the achievement of contract milestones or progress payments based on a percentage of costs we incur. For the majority of our international direct commercial contracts to deliver complex systems, we typically receive advance payments prior to commencement of work, as well as milestone payments that are paid in accordance with the terms of our contract as we perform. We recognize a liability for payments in excess of revenue recognized, which is presented as a contract liability on the balance sheet. The portion of payments retained by the customer until final contract settlement is not considered a significant financing component because the intent is to protect the customer from our failure to adequately complete some or all of the obligations under the contract. Payments received from customers in advance of revenue recognition are not considered to be significant financing components because they are used to meet working capital demands that can be higher in the early stages of a contract. For fixed-price and cost-reimbursable contracts, we present revenues recognized in excess of billings as contract assets on the balance sheet. Amounts billed and due from our customers under both contract types are classified as receivables on the balance sheet. Significant estimates and assumptions are made in estimating contract sales and costs, including the profit booking rate. At the outset of a long-term contract, we identify and monitor risks to the achievement of the technical, schedule and cost aspects of the contract, as well as variable consideration, and assess the effects of those risks on our estimates of sales and total costs to complete the contract. The estimates consider the technical requirements (e.g., a newly-developed product versus a mature product), the schedule and associated tasks (e.g., the number and type of milestone events) and costs (e.g., material, labor, subcontractor, overhead, general and administrative and the estimated costs to fulfill our industrial cooperation agreements, sometimes referred to as offset or localization agreements, required under certain contracts with international customers). The initial profit booking rate of each contract considers risks surrounding the ability to achieve the technical requirements, schedule and costs in the initial estimated total costs to complete the contract. Profit booking rates may increase during the performance of the contract if we successfully retire risks surrounding the technical, schedule and cost aspects of the contract, which decreases the estimated total costs to complete the contract or may increase the variable consideration we expect to receive on the contract. Conversely, our profit booking rates may decrease if the estimated total costs to complete the contract increase or our estimates of variable consideration we expect to receive decrease. All of the estimates are subject to change during the performance of the contract and may affect the profit booking rate. When estimates of total costs to be incurred on a contract exceed total estimates of the transaction price, a provision for the entire loss is determined at the contract level and is recorded in the period in which the loss is determined. Comparability of our segment sales, operating profit and operating margin may be impacted favorably or unfavorably by changes in profit booking rates on our contracts for which we recognize revenue over time using the percentage-of-completion cost-to-cost method to measure progress towards completion. Increases in the profit booking rates, typically referred to as risk retirements, usually relate to revisions in the estimated total costs to fulfill the performance obligations that reflect improved conditions on a particular contract. Conversely, conditions on a particular contract may deteriorate, resulting in an increase in the estimated total costs to fulfill the performance obligations and a reduction in the profit booking rate. Increases or decreases in profit booking rates are recognized in the current period and reflect the inception-to-date effect of such changes. Segment operating profit and margin may also be impacted favorably or unfavorably by other items, which may or may not impact sales. Contract assets – Contract assets include unbilled amounts typically resulting from sales under contracts when the percentage-of-completion cost-to-cost method of revenue recognition is utilized and revenue recognized exceeds the amount billed to the customer. The amounts may not exceed their estimated net realizable value. Contract assets are classified as current based on our contract operating cycle. Contract liabilities – Contract liabilities include advance payments and billings in excess of revenue recognized. Contract liabilities are classified as current based on our contract operating cycle and reported on a contract-by-contract basis, net of revenue recognized, at the end of each reporting period.
Research and development and similar costs	Research and development and similar costs – We conduct research and development (R&D) activities using our own funds (referred to as company-funded R&D or independent research and development (IR&D)) and under contractual arrangements with our customers (referred to as customer-funded R&D) to enhance existing products and services and to develop future technologies. R&D costs include basic research, applied research, concept formulation studies, design, development, and related test activities. Company-funded R&D costs are allocated to customer contracts as part of the general and administrative overhead costs and generally recoverable on our customer contracts with the U.S. Government. Customer-funded R&D costs are charged directly to the related customer contract. Substantially all R&D costs are charged to cost of sales as incurred.
Stock-based compensation	Stock-based compensation – Compensation cost related to all share-based payments is measured at the grant date based on the estimated fair value of the award. We generally recognize the compensation cost ratably over a three-year vesting period, net of estimated forfeitures. At each reporting date, the number of shares is adjusted to the number ultimately expected to vest.
Income taxes	Income taxes – We calculate our provision for income taxes using the asset and liability method, under which deferred tax assets and liabilities are recognized based on the future tax consequences attributable to temporary differences that exist between the financial statement carrying amount of assets and liabilities and their respective tax bases, as well as from operating loss and tax credit carry-forwards. We measure deferred tax assets and liabilities using enacted tax rates that will apply in the years in which we expect the temporary differences to be recovered or paid. We periodically assess our tax exposures related to periods that are open to examination. Based on the latest available information, we evaluate our tax positions to determine whether the position will more likely than not be sustained upon examination by the Internal Revenue Service (IRS) or other taxing authorities. If we cannot reach a more-likely-than-not determination, no benefit is recorded. If we determine that the tax position is more likely than not to be sustained, we record the largest amount of benefit that is more likely than not to be realized when the tax position is settled. We record interest and penalties related to income taxes as a component of income tax expense on our consolidated statements of earnings. Interest and penalties were not material.
Cash and cash equivalents	Cash and cash equivalents – Cash equivalents include highly liquid instruments with original maturities of 90 days or less.
Receivables	Receivables – Receivables, net represent our unconditional right to consideration under the contract and include amounts billed and currently due from customers. The amounts are stated at their net estimated realizable value.
Inventories	Inventories – We record inventories at the lower of cost or estimated net realizable value. If events or changes in circumstances indicate that the utility of our inventories have diminished through damage, deterioration, obsolescence, changes in price or other causes, a loss is recognized in the period in which it occurs. We capitalize labor, material, subcontractor and overhead costs as work-in-process for contracts where control has not yet passed to the customer. In addition, we capitalize costs incurred to fulfill a contract in advance of contract award in inventories as work-in-process if we determine that contract award is probable. We determine the costs of other product and supply inventories by using the first-in first-out or average cost methods.
Property, plant and equipment	Property, plant and equipment – We record property, plant and equipment at cost. We provide for depreciation and amortization on plant and equipment generally using accelerated methods during the first half of the estimated useful lives of the assets and the straight-line method thereafter. The estimated useful lives of our plant and equipment generally range from 10 to 40 years for buildings and five
Capitalized software	Capitalized software – We capitalize certain costs associated with the development or purchase of internal-use software. The amounts capitalized are included in other noncurrent assets on our consolidated balance sheets and are amortized on a straight-line basis over the estimated useful life of the resulting software, which ranges from two
Goodwill	Goodwill and Intangible Assets – The assets and liabilities of acquired businesses are recorded under the acquisition method of accounting at their estimated fair values at the date of acquisition. Goodwill represents costs in excess of fair values assigned to the underlying identifiable net assets of acquired businesses. Intangible assets from acquired businesses are recognized at fair value on the acquisition date and consist of customer programs, trademarks, customer relationships, technology and other intangible assets. Customer programs include values assigned to major programs of acquired businesses and represent the aggregate value associated with the customer relationships, contracts, technology and trademarks underlying the associated program and are amortized on a straight-line basis over a period of expected cash flows used to measure fair value, which ranges from nine at which we test goodwill for impairment requires us to determine whether the operations below the business segment constitute a self-sustaining business for which discrete financial information is available and segment management regularly reviews the operating results. We may use either a qualitative or quantitative approach when testing a reporting unit’s goodwill for impairment. For selected reporting units where we use the qualitative approach, we perform a qualitative evaluation of events and circumstances impacting the reporting unit to determine the likelihood of goodwill impairment. Based on that qualitative evaluation, if we determine it is more likely than not that the fair value of a reporting unit exceeds its carrying amount, no further evaluation is necessary. Otherwise we perform a quantitative impairment test. We perform quantitative tests for most reporting units at least once every three years. However, for certain reporting units we may perform a quantitative impairment test every year. For the quantitative impairment test we compare the fair value of a reporting unit to its carrying value, including goodwill. If the fair value of a reporting unit exceeds its carrying value, goodwill of the reporting unit is not impaired. If the carrying value of the reporting unit, including goodwill, exceeds its fair value, a goodwill impairment loss is recognized in an amount equal to that excess. We generally estimate the fair value of each reporting unit using a combination of a discounted cash flow (DCF) analysis and market-based valuation methodologies such as comparable public company trading values and values observed in recent business acquisitions. Determining fair value requires the exercise of significant judgments, including the amount and timing of expected future cash flows, long-term growth rates, discount rates and relevant comparable public company earnings multiples and relevant transaction multiples. The cash flows employed in the DCF analysis are based on our best estimate of future sales, earnings and cash flows after considering factors such as general market conditions, U.S. Government budgets, existing firm orders, expected future orders, contracts with suppliers, labor agreements, changes in working capital, long term business plans and recent operating performance. The discount rates utilized in the DCF analysis are based on the respective reporting unit’s weighted average cost of capital, which takes into account the relative weights of each component of capital structure (equity and debt) and represents the expected cost of new capital, adjusted as appropriate to consider the risk inherent in future cash flows of the respective reporting unit. The carrying value of each reporting unit includes the assets and liabilities employed in its operations, goodwill and allocations of certain assets and liabilities held at the business segment and corporate levels. During the fourth quarters of 2020, 2019 and 2018, we performed our annual goodwill impairment test for each of our reporting units. The results of our annual impairment tests of goodwill indicated that no impairment existed.
Intangible assets	Acquired intangible assets deemed to have indefinite lives are not amortized, but are subject to annual impairment testing. This testing compares carrying value to fair value and, when appropriate, the carrying value of these assets is reduced to fair value. Finite-lived intangibles are amortized to expense over the applicable useful lives, ranging from three
Postretirement benefit plans	Postretirement benefit plans – Many of our employees are covered by defined benefit pension plans and we provide certain health care and life insurance benefits to eligible retirees (collectively, postretirement benefit plans). GAAP requires that the amounts we record related to our postretirement benefit plans be computed, based on service to date, using actuarial valuations that are based in part on certain key economic assumptions we make, including the discount rate, the expected long-term rate of return on plan assets and other actuarial assumptions including participant longevity (also known as mortality), health care cost trend rates and employee turnover, each as appropriate based on the nature of the plans. A market-related value of our plan assets, determined using actual asset gains or losses over the prior three year period, is used to calculate the amount of deferred asset gains or losses to be amortized. These asset gains or losses, along with those resulting from adjustments to our benefit obligation, will be amortized to expense using the corridor method, where gains and losses are recognized over a period of years to the extent they exceed 10% of the greater of plan assets or benefit obligations. This amortization period extended in 2020 due to the freeze of our salaried pension plans to use the average remaining life expectancy of the participants instead of average future service. We recognize on a plan-by-plan basis the funded status of our postretirement benefit plans under GAAP as either an asset recorded within other noncurrent assets or a liability recorded within noncurrent liabilities on our consolidated balance sheets. The GAAP funded status is measured as the difference between the fair value of the plan’s assets and the benefit obligation of the plan. The funded status under the Employee Retirement Income Security Act of 1974 (ERISA), as amended by the Pension Protection Act of 2006 (PPA), is calculated on a different basis than under GAAP.
Environmental matters	Environmental matters – We record a liability for environmental matters when it is probable that a liability has been incurred and the amount can be reasonably estimated. The amount of liability recorded is based on our estimate of the costs to
Investments in marketable securities	Investments in marketable securities – Investments in marketable securities consist of debt and equity securities which are recorded at fair value.Our investments are held in a separate trust, which includes investments to fund our deferred compensation plan liabilities.Gains and losses on these investments are included in other unallocated, net within cost of sales on our consolidated statements of earnings in order to align the classification of changes in the market value of investments held for the plan with changes in the value of the corresponding plan liabilities.
Equity method investments	Equity method investments – Investments where we have the ability to exercise significant influence, but do not control, are accounted for under the equity method of accounting and are included in other noncurrent assets on our consolidated balance sheets. Significant influence typically exists if we have a 20% to 50% ownership interest in the investee. Under this method of accounting, our share of the net earnings or losses of the investee is included in operating profit in other income, net on our consolidated statements of earnings since the activities of the investee are closely aligned with the operations of the business segment holding the investment. We evaluate our equity method investments for impairment whenever events or changes in circumstances indicate that the carrying amounts of such investments may be impaired. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period.
Derivative financial instruments	Derivative financial instruments – We use derivative instruments principally to reduce our exposure to market risks from changes in foreign currency exchange rates and interest rates. We do not enter into or hold derivative instruments for speculative trading purposes. We transact business globally and are subject to risks associated with changing foreign currency exchange rates. We enter into foreign currency hedges such as forward and option contracts that change in value as foreign currency exchange rates change. Our most significant foreign currency exposures relate to the British pound sterling, the euro, the Canadian dollar and the Australian dollar. These contracts hedge forecasted foreign currency transactions in order to mitigate fluctuations in our earnings and cash flows associated with changes in foreign currency exchange rates. We designate foreign currency hedges as cash flow hedges. We also are exposed to the impact of interest rate changes primarily through our borrowing activities. For fixed rate borrowings, we may use variable interest rate swaps, effectively converting fixed rate borrowings to variable rate borrowings in order to hedge changes in the fair value of the debt. These swaps are designated as fair value hedges. For variable rate borrowings, we may use fixed interest rate swaps, effectively converting variable rate borrowings to fixed rate borrowings in order to mitigate the impact of interest rate changes on earnings. These swaps are
Recent Accounting Pronouncements	Recent Accounting Pronouncements Compensation—Retirement Benefits—Defined Benefit Plans—General Effective January 1, 2020, we adopted Accounting Standards Update (ASU) 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements For Defined Benefit Plans . The new standard modifies the annual disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The guidance requires disclosure changes to be presented on a retrospective basis. As this standard relates only to financial disclosures, its adoption did not have an impact to our results of operations, financial position or cash flows. Financial Instruments—Credit Losses Effective January 1, 2020, we adopted ASU 2016-13, Financial Instruments—Credit Losses (Topic 326) : Measurement of Credit Losses on Financial Instruments using the modified retrospective approach. The new standard changes how we 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. Under legacy standards, we recognized an impairment of receivables when it was probable that a loss had been incurred. Under the new standard, we are required to recognize estimated credit losses expected to occur over the estimated life or remaining contractual life of an asset (which includes losses that may be incurred in future periods) using a broader range of information including reasonable and supportable forecasts about future economic conditions. The adoption of the standard did not have a significant impact on our results of operations, financial position or cash flows. Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting In 2017, the United Kingdom’s Financial Conduct Authority announced that after 2021 it would no longer compel banks to submit the rates required to calculate the London Interbank Offered Rate (LIBOR) and other interbank offered rates, which have been widely used as reference rates for various securities and financial contracts, including loans, debt and derivatives. This announcement indicates that the continuation of LIBOR on the current basis is not guaranteed after 2021. Regulators in the U.S. and other jurisdictions have been working to replace these rates with alternative reference interest rates that are supported by transactions in liquid and observable markets, such as the Secured Overnight Financing Rate (SOFR). Currently, our credit facility and certain of our debt and derivative instruments reference LIBOR-based rates. The discontinuation of LIBOR will require these arrangements to be modified in order to replace LIBOR with an alternative reference interest rate, which could impact our future cost of funds. Our credit facility includes a provision for the determination of a successor LIBOR rate. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting , which temporarily simplifies the accounting for contract modifications, including hedging relationships, due to the transition from LIBOR and other interbank offered rates to alternative reference interest rates. For example, entities can elect not to remeasure the contracts at the modification date or reassess a previous accounting determination if certain conditions are met. Additionally, entities can elect to continue applying hedge accounting for hedging relationships affected by reference rate reform if certain conditions are met. The new standard was effective upon issuance and generally can be applied to applicable contract modifications through December 31, 2022. We are currently evaluating the impact of the transition from LIBOR to alternative reference interest rates, but do not expect a significant impact to our operating results, financial position or cash flows.
Earnings per share computation	We compute basic and diluted earnings per common share by dividing net earnings by the respective weighted average number of common shares outstanding for the periods presented. Our calculation of diluted earnings per common share also includes the dilutive effects for the assumed vesting of outstanding restricted stock units (RSUs), performance stock units (PSUs) and exercise of outstanding stock options based on the treasury stock method.
Acquired finite lived intangible assets	Acquired finite-lived intangible assets are amortized to expense primarily on a straight-line basis over the following estimated useful lives: customer programs, from nine four three
Inventories, costs to fulfill a contract	Costs incurred to fulfill a contract in advance of the contract being awarded are included in inventories as work-in-process if we determine that those costs relate directly to a contract or to an anticipated contract that we can specifically identify and contract award is probable, the costs generate or enhance resources that will be used in satisfying performance obligations, and the costs are recoverable (referred to as pre-contract costs). Pre-contract costs that are initially capitalized in inventory are generally recognized as cost of sales consistent with the transfer of products and services to the customer upon the receipt of the anticipated contract. All other pre-contract costs, including start-up costs, are expensed as incurred.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of Weighted Average Shares Outstanding Used to Compute Earnings Per Common Share	The weighted average number of shares outstanding used to compute earnings per common share were as follows (in millions): 2020 2019 2018 Weighted average common shares outstanding for basic computations 280.0 282.0 284.5 Weighted average dilutive effect of equity awards 1.2 1.8 2.3 Weighted average common shares outstanding for diluted computations 281.2 283.8 286.8

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangibles (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the Carrying Amount of Goodwill by Segment	Changes in the carrying amount of goodwill by segment were as follows (in millions): Aeronautics MFC RMS Space Total Balance at December 31, 2018 $ 171 $ 2,262 $ 6,751 $ 1,585 $ 10,769 Distributed Energy Solutions divestiture — (175) — — (175) Other — 2 7 1 10 Balance at December 31, 2019 171 2,089 6,758 1,586 10,604 Acquisitions 16 — — 173 189 Other — 2 10 1 13 Balance at December 31, 2020 $ 187 $ 2,091 $ 6,768 $ 1,760 $ 10,806
The Gross Carrying Amounts and Accumulated Amortization of Acquired Intangible Assets	The gross carrying amounts and accumulated amortization of our acquired intangible assets consisted of the following (in millions): 2020 2019 Gross Accumulated Net Gross Accumulated Net Finite-Lived: Customer programs $ 3,184 $ (1,199) $ 1,985 $ 3,184 $ (967) $ 2,217 Customer relationships 366 (287) 79 344 (243) 101 Other 85 (24) 61 53 (45) 8 Total finite-lived intangibles 3,635 (1,510) 2,125 3,581 (1,255) 2,326 Indefinite-Lived: Trademark 887 — 887 887 — 887 Total acquired intangibles $ 4,522 $ (1,510) $ 3,012 $ 4,468 $ (1,255) $ 3,213
The Gross Carrying Amounts and Accumulated Amortization of Acquired Intangible Assets	The gross carrying amounts and accumulated amortization of our acquired intangible assets consisted of the following (in millions): 2020 2019 Gross Accumulated Net Gross Accumulated Net Finite-Lived: Customer programs $ 3,184 $ (1,199) $ 1,985 $ 3,184 $ (967) $ 2,217 Customer relationships 366 (287) 79 344 (243) 101 Other 85 (24) 61 53 (45) 8 Total finite-lived intangibles 3,635 (1,510) 2,125 3,581 (1,255) 2,326 Indefinite-Lived: Trademark 887 — 887 887 — 887 Total acquired intangibles $ 4,522 $ (1,510) $ 3,012 $ 4,468 $ (1,255) $ 3,213

Information on Business Segme_2

Information on Business Segments (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Summary Of Financial Information For Each Business Segment	Summary operating results for each of our business segments were as follows (in millions): 2020 2019 2018 Net sales Aeronautics $ 26,266 $ 23,693 $ 21,242 Missiles and Fire Control 11,257 10,131 8,462 Rotary and Mission Systems 15,995 15,128 14,250 Space 11,880 10,860 9,808 Total net sales $ 65,398 $ 59,812 $ 53,762 Operating profit Aeronautics $ 2,843 $ 2,521 $ 2,272 Missiles and Fire Control 1,545 1,441 1,248 Rotary and Mission Systems 1,615 1,421 1,302 Space 1,149 1,191 1,055 Total business segment operating profit 7,152 6,574 5,877 Unallocated items FAS/CAS operating adjustment (a) 1,876 2,049 1,803 Stock-based compensation (221) (189) (173) Severance and restructuring charges (b) (27) — (96) Other, net (c) (136) 111 (77) Total unallocated, net 1,492 1,971 1,457 Total consolidated operating profit $ 8,644 $ 8,545 $ 7,334 (a) The FAS/CAS operating adjustment represents the difference between the service cost component of FAS pension income (expense) and total pension costs recoverable on U.S. Government contracts as determined in accordance with CAS. For a detail of the FAS/CAS operating adjustment and the total net FAS/CAS pension adjustment, see the table below. (b) See “Note 16 – Severance Charges” discussion for information on charges related to certain severance actions across our organization. (c) Other, net in 2020 includes a non-cash impairment charge of $128 million recognized in the second quarter of 2020 on our investment in the international equity method investee, AMMROC, which decreased net earnings from continuing operations by $96 million. Other, net in 2019 includes a previously deferred non-cash gain of $51 million related to properties sold in 2015 as a result of completing our remaining obligations and a gain of $34 million for the sale of its Distributed Energy Solutions business. Other, net in 2018 includes a non-cash asset impairment charge of $110 million related to our equity method investee, AMMROC (see “Note 1 – Significant Accounting Policies”). Total net FAS/CAS pension adjustments, including the service and non-service cost components of FAS pension income (expense), were as follows (in millions): 2020 2019 2018 Total FAS income (expense) and CAS costs FAS pension income (expense) $ 118 $ (1,093) $ (1,431) Less: CAS pension cost 1,977 2,565 2,433 Net FAS/CAS pension adjustment $ 2,095 $ 1,472 $ 1,002 Service and non-service cost reconciliation FAS pension service cost $ (101) $ (516) $ (630) Less: CAS pension cost 1,977 2,565 2,433 FAS/CAS operating adjustment 1,876 2,049 1,803 Non-operating FAS pension income (expense) 219 (577) (801) Net FAS/CAS pension adjustment $ 2,095 $ 1,472 $ 1,002 2020 2019 2018 Intersegment sales Aeronautics $ 243 $ 217 $ 120 Missiles and Fire Control 562 515 423 Rotary and Mission Systems 1,903 1,872 1,759 Space 377 352 237 Total intersegment sales $ 3,085 $ 2,956 $ 2,539 Depreciation and amortization Aeronautics $ 348 $ 318 $ 304 Missiles and Fire Control 138 124 105 Rotary and Mission Systems 476 464 458 Space 219 213 229 Total business segment depreciation and amortization 1,181 1,119 1,096 Corporate activities 109 70 65 Total depreciation and amortization $ 1,290 $ 1,189 $ 1,161 Capital expenditures Aeronautics $ 534 $ 526 $ 460 Missiles and Fire Control 391 300 244 Rotary and Mission Systems 311 272 255 Space 403 258 255 Total business segment capital expenditures 1,639 1,356 1,214 Corporate activities 127 128 64 Total capital expenditures $ 1,766 $ 1,484 $ 1,278 Net Sales by Type Net sales by total products and services, contract type, customer category and geographic region for each of our business segments were as follows (in millions): 2020 Aeronautics MFC RMS Space Total Net sales Products $ 22,327 $ 9,804 $ 12,748 $ 10,049 $ 54,928 Services 3,939 1,453 3,247 1,831 10,470 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 Net sales by contract type Fixed-price $ 18,477 $ 7,587 $ 10,795 $ 2,247 $ 39,106 Cost-reimbursable 7,789 3,670 5,200 9,633 26,292 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 Net sales by customer U.S. Government $ 18,175 $ 8,404 $ 11,596 $ 10,293 $ 48,468 International (a) 8,012 2,842 3,986 1,546 16,386 U.S. commercial and other 79 11 413 41 544 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 Net sales by geographic region United States $ 18,254 $ 8,415 $ 12,009 $ 10,334 $ 49,012 Asia Pacific 3,162 280 1,666 68 5,176 Europe 3,283 767 806 1,478 6,334 Middle East 1,344 1,749 847 — 3,940 Other 223 46 667 — 936 Total net sales $ 26,266 $ 11,257 $ 15,995 $ 11,880 $ 65,398 2019 Aeronautics MFC RMS Space Total Net sales Products $ 20,319 $ 8,424 $ 12,206 $ 9,104 $ 50,053 Services 3,374 1,707 2,922 1,756 9,759 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 Net sales by contract type Fixed-price $ 17,239 $ 6,449 $ 10,382 $ 2,135 $ 36,205 Cost-reimbursable 6,454 3,682 4,746 8,725 23,607 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 Net sales by customer U.S. Government $ 14,776 $ 7,524 $ 10,803 $ 9,322 $ 42,425 International (a) 8,733 2,465 3,822 1,511 16,531 U.S. commercial and other 184 142 503 27 856 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 Net sales by geographic region United States $ 14,960 $ 7,666 $ 11,306 $ 9,349 $ 43,281 Asia Pacific 3,882 420 1,451 73 5,826 Europe 3,224 516 769 1,419 5,928 Middle East 1,465 1,481 979 19 3,944 Other 162 48 623 — 833 Total net sales $ 23,693 $ 10,131 $ 15,128 $ 10,860 $ 59,812 (a) International sales include FMS contracted through the U.S. Government, direct commercial sales with international governments and commercial and other sales to international customers. 2018 Aeronautics MFC RMS Space Total Net sales Products $ 18,207 $ 6,945 $ 11,714 $ 8,139 $ 45,005 Services 3,035 1,517 2,536 1,669 8,757 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 Net sales by contract type Fixed-price $ 15,719 $ 5,653 $ 9,975 $ 1,892 $ 33,239 Cost-reimbursable 5,523 2,809 4,275 7,916 20,523 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 Net sales by customer U.S. Government $ 13,321 $ 6,088 $ 10,083 $ 8,224 $ 37,716 International (a) 7,735 2,190 3,693 1,538 15,156 U.S. commercial and other 186 184 474 46 890 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 Net sales by geographic region United States $ 13,507 $ 6,272 $ 10,557 $ 8,270 $ 38,606 Asia Pacific 3,335 427 1,433 85 5,280 Europe 2,837 321 829 1,416 5,403 Middle East 1,380 1,404 781 37 3,602 Other 183 38 650 — 871 Total net sales $ 21,242 $ 8,462 $ 14,250 $ 9,808 $ 53,762 (a) International sales include FMS contracted through the U.S. Government, direct commercial sales with international governments and commercial and other sales to international customers. Total assets for each of our business segments were as follows (in millions): 2020 2019 Assets (a) Aeronautics $ 9,903 $ 9,109 Missiles and Fire Control 4,966 5,030 Rotary and Mission Systems 18,035 18,751 Space 6,451 5,844 Total business segment assets 39,355 38,734 Corporate assets (b) 11,355 8,794 Total assets $ 50,710 $ 47,528 (a) We have no long-lived assets with material carrying values located in foreign countries. (b) Corporate assets primarily include cash and cash equivalents, deferred income taxes, assets for the portion of environmental costs that are probable of future recovery and investments held in a separate trust.

Receivables, net, Contract As_2

Receivables, net, Contract Assets and Contract Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Schedule of Receivables, Net, Contract Assets and Contract Liabilities	Receivables, net, contract assets and contract liabilities were as follows (in millions): 2020 2019 Receivables, net $ 1,978 $ 2,337 Contract assets 9,545 9,094 Contract liabilities 7,545 7,054

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following (in millions): 2020 2019 Materials, spares and supplies $ 612 $ 532 Work-in-process 2,693 2,783 Finished goods 240 304 Total inventories $ 3,545 $ 3,619

Property, Plant and Equipment_2

Property, Plant and Equipment, net (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment, net consisted of the following (in millions): 2020 2019 Land $ 142 $ 136 Buildings 7,425 7,013 Machinery and equipment 8,661 8,128 Construction in progress 1,921 1,701 Total property, plant and equipment 18,149 16,978 Less: accumulated depreciation and amortization (10,936) (10,387) Total property, plant and equipment, net $ 7,213 $ 6,591

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Future Minimum Lease Commitments	Future minimum lease commitments at December 31, 2020 were as follows (in millions): Total 2021 2022 2023 2024 2025 Thereafter Operating leases $ 1,273 $ 300 $ 199 $ 156 $ 126 $ 89 $ 403 Less: imputed interest $ 158 Total $ 1,115

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Provision for Federal & Foreign Income Tax Expense	Our provision for federal and foreign income tax expense for continuing operations consisted of the following (in millions): 2020 2019 2018 Federal income tax expense (benefit): Current Operations $ 1,292 $ 698 $ 975 One-time charge due to tax legislation — — (6) Deferred Operations 21 235 (194) One-time charge due to tax legislation — — (37) Total federal income tax expense 1,313 933 738 Foreign income tax expense (benefit): Current 50 91 67 Deferred (16) (13) (13) Total foreign income tax expense 34 78 54 Total income tax expense $ 1,347 $ 1,011 $ 792
Reconciliation of Income Tax Expense Computed Using U.S. Statutory Federal Tax Rate to Actual Income Tax Expense	Our reconciliation of the U.S. federal statutory income tax rate of 21.0% to actual income tax expense for continuing operations is as follows (dollars in millions): 2020 2019 2018 Amount Rate Amount Rate Amount Rate Income tax expense at the U.S. federal statutory tax rate $ 1,729 21.0 % $ 1,521 21.0 % $ 1,226 21.0 % Foreign derived intangible income deduction (170) (2.1) (122) (1.7) (61) (1.0) Research and development tax credit (97) (1.2) (148) (2.0) (138) (2.4) Tax deductible dividends (64) (0.8) (62) (0.9) (59) (1.0) Excess tax benefits for share-based payment awards (52) (0.6) (63) (0.9) (55) (0.9) Tax accounting method change (a) — — (15) (0.2) (61) (1.0) Deferred tax write-down and transition tax (b) — — — — (43) (0.7) Other, net (c) 1 0.1 (100) (1.3) (17) (0.4) Income tax expense $ 1,347 16.4 % $ 1,011 14.0 % $ 792 13.6 % (a) Recognized tax benefit of $15 million and $61 million in 2019 and 2018, from our change in a tax accounting method related to restoration of tax basis. (b) Includes a deferred tax re-measurement and transition tax true-up in 2018 primarily due to the re-measurement of certain net deferred tax assets using the lower U.S. corporate income tax rate and a deemed repatriation tax.
Components of Federal and Foreign Deferred Tax Assets and Liabilities	The primary components of our federal and foreign deferred income tax assets and liabilities at December 31 were as follows (in millions): 2020 2019 Deferred tax assets related to: Accrued compensation and benefits $ 926 $ 659 Pensions 2,994 3,057 Contract accounting methods 392 349 Foreign company operating losses and credits 51 49 Other (a) 509 416 Valuation allowance (b) (13) (28) Deferred tax assets, net 4,859 4,502 Deferred tax liabilities related to: Goodwill and purchased intangibles 363 330 Property, plant and equipment 481 340 Exchanged debt securities and other (a) 547 525 Deferred tax liabilities 1,391 1,195 Net deferred tax assets $ 3,468 $ 3,307 (a) Includes deferred tax assets and liabilities related to lease liability and ROU asset. (b) A valuation allowance was provided against certain foreign company deferred tax assets arising from carryforwards of unused tax benefits.

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Long-term Debt	Our total debt consisted of the following (in millions): 2020 2019 Notes 2.50% due 2020 $ — $ 1,250 3.35% due 2021 500 900 3.10% due 2023 500 500 2.90% due 2025 750 750 3.55% due 2026 2,000 2,000 1.85% due 2030 400 — 3.60% due 2035 500 500 4.50% and 6.15% due 2036 1,054 1,054 4.07% due 2042 1,336 1,336 3.80% due 2045 1,000 1,000 4.70% due 2046 1,326 1,326 2.80% due 2050 750 — 4.09% due 2052 1,578 1,578 Other notes with rates from 4.85% to 9.13%, due 2022 to 2041 1,605 1,618 Total debt 13,299 13,812 Less: unamortized discounts and issuance costs (1,130) (1,158) Total debt, net 12,169 12,654 Less: current portion (500) (1,250) Long-term debt, net $ 11,669 $ 11,404

Postretirement Benefit Plans (T

Postretirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Schedule of Net Periodic Benefit Costs	The net periodic benefit cost (income) recognized for our qualified defined benefit pension plans and our retiree medical and life insurance plans each year included the following (in millions): Qualified Defined Benefit Pension Plans (a) Retiree Medical and 2020 2019 2018 2020 2019 2018 Service cost $ 101 $ 516 $ 630 $ 13 $ 14 $ 19 Interest cost 1,538 1,806 1,740 70 97 91 Expected return on plan assets (2,264) (2,300) (2,395) (127) (110) (135) Recognized net actuarial losses (gains) 849 1,404 1,777 (4) 2 5 Amortization of net prior service (credit) cost (342) (333) (321) 39 42 15 Total net periodic benefit cost (income) $ (118) $ 1,093 $ 1,431 $ (9) $ 45 $ (5)
Reconciliation of Benefit Obligations, Plan Assets, and Unfunded or Funded Status	The following table provides a reconciliation of benefit obligations, plan assets and unfunded status related to our qualified defined benefit pension plans and our retiree medical and life insurance plans (in millions): Qualified Defined Retiree Medical and 2020 2019 2020 2019 Change in benefit obligation Beginning balance $ 48,674 $ 43,305 $ 2,226 $ 2,348 Service cost 101 516 13 14 Interest cost 1,538 1,806 70 97 Benefits paid (2,188) (2,294) (220) (229) Settlements (1,392) (1,933) — — Actuarial losses (gains) 5,036 6,403 135 (1) Changes in longevity assumptions (426) 860 (18) (70) Plan amendments and curtailments 9 11 (8) (6) Medicare Part D subsidy — — 3 2 Participants’ contributions — — 70 71 Ending balance $ 51,352 $ 48,674 $ 2,271 $ 2,226 Change in plan assets Beginning balance at fair value $ 35,442 $ 32,002 $ 1,889 $ 1,644 Actual return on plan assets 5,594 6,667 298 342 Benefits paid (2,188) (2,294) (220) (229) Settlements (1,392) (1,933) — — Company contributions 1,025 1,000 45 59 Medicare Part D subsidy — — 3 2 Participants’ contributions — — 70 71 Ending balance at fair value $ 38,481 $ 35,442 $ 2,085 $ 1,889 Unfunded status of the plans $ (12,871) $ (13,232) $ (186) $ (337)
Amounts Recognized on Balance Sheets Related to Qualified Defined Benefit Pension Plans and Retiree Medical and Life Insurance Plans	The following table provides amounts recognized on our consolidated balance sheets related to our qualified defined benefit pension plans and our retiree medical and life insurance plans (in millions): Qualified Defined Retiree Medical and 2020 2019 2020 2019 Prepaid pension asset $ 3 $ 2 $ — $ — Accrued postretirement benefit liabilities (12,874) (13,234) (186) (337) Accumulated other comprehensive loss (pre-tax) related to: Net actuarial losses 21,040 20,609 (119) (69) Prior service (credit) cost (1,235) (1,586) 73 120 Total (a) $ 19,805 $ 19,023 $ (46) $ 51 (a) Accumulated other comprehensive loss related to postretirement benefit plans, after-tax, of $16.2 billion and $15.5 billion at December 31, 2020 and 2019 (see “Note 13 – Stockholders’ Equity”) includes $19.8 billion ($15.6 billion, net of tax) and $19.0 billion ($15.0 billion, net of tax) for qualified defined benefit pension plans, $(46) million ($(37) million, net of tax) and $51 million ($39 million, net of tax) for retiree medical and life insurance plans and $782 million ($617 million, net of tax) and $667 million ($527 million, net of tax) for other plans.
Amounts Recognized in Other Comprehensive Income (Loss) Related to Postretirement Benefit Plans, Net of Tax	The following table provides the amounts recognized in other comprehensive income (loss) related to postretirement benefit plans, net of tax, for the years ended December 31, 2020 , 2019 and 2018 (in millions): Incurred but Not Yet Recognition of 2020 2019 2018 2020 2019 2018 Gains (losses) (Gains) losses Actuarial gains and losses Qualified defined benefit pension plans $ (1,005) $ (2,283) $ (570) $ 668 $ 1,104 $ 1,396 Retiree medical and life insurance plans 43 238 71 (3) 2 4 Other plans (104) (133) 83 24 42 55 (1,066) (2,178) (416) 689 1,148 1,455 Credit (cost) (Credit) cost Net prior service credit and cost Qualified defined benefit pension plans (7) (8) (6) (269) (263) (255) Retiree medical and life insurance plans 6 4 (79) 30 33 12 Other plans — — — (10) (10) (10) (1) (4) (85) (249) (240) (253) $ (1,067) $ (2,182) $ (501) $ 440 $ 908 $ 1,202
Actuarial Assumptions Used to Determine Net Periodic Benefit Cost	The actuarial assumptions used to determine the benefit obligations at December 31 of each year and to determine the net periodic benefit cost for each subsequent year, were as follows: Qualified Defined Benefit Retiree Medical and 2020 2019 2018 2020 2019 2018 Weighted average discount rate 2.500 % 3.250 % 4.250 % 2.375 % 3.250 % 4.250 % Expected long-term rate of return on assets 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % 7.00 % Health care trend rate assumed for next year 7.75 % 8.00 % 8.25 % Ultimate health care trend rate 4.50 % 4.50 % 5.00 % Year that the ultimate health care trend rate is reached 2034 2034 2032
Schedule of Allocation of Plan Assets	LMIMCo’s investment policies require that asset allocations of postretirement benefit plans be maintained within the following approximate ranges: Asset Class Asset Allocation Cash and cash equivalents 0-20% Equity 15-65% Fixed income 10-60% Alternative investments: Private equity funds 0-15% Real estate funds 0-10% Hedge funds 0-20% Commodities 0-15% Fair value measurements – The rules related to accounting for postretirement benefit plans under GAAP require certain fair value disclosures related to postretirement benefit plan assets, even though those assets are not separately presented on our consolidated balance sheets. The following table presents the fair value of the assets (in millions) of our qualified defined benefit pension plans and retiree medical and life insurance plans by asset category and their level within the fair value hierarchy, which has three levels based on the ability to observe inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets, Level 2 refers to fair values estimated using significant other observable inputs and Level 3 includes fair values estimated using significant unobservable inputs. Certain other investments are measured at their Net Asset Value (NAV) per share and do not have readily determined values and are thus not subject to leveling in the fair value hierarchy. The NAV is the total value of the fund divided by the number of the fund’s shares outstanding. We recognize transfers between levels of the fair value hierarchy as of the date of the change in circumstances that causes the transfer. December 31, 2020 December 31, 2019 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Investments measured at fair value Cash and cash equivalents (a) $ 1,109 $ 1,109 $ — $ — $ 1,961 $ 1,961 $ — $ — Equity (a) : U.S. equity securities 7,535 7,467 8 60 7,189 7,182 — 7 International equity securities 6,844 6,836 — 8 7,244 7,217 23 4 Commingled equity funds 1,671 442 1,228 1 1,933 582 1,351 — Fixed income (a) : Corporate debt securities 5,732 — 5,730 2 5,208 — 5,206 2 U.S. Government securities 2,506 — 2,506 — 2,260 — 2,260 — U.S. Government-sponsored enterprise securities 230 — 230 — 530 — 530 — Other fixed income investments (b) 5,873 37 4,063 1,773 3,134 35 2,135 964 Total $ 31,500 $ 15,891 $ 13,765 $ 1,844 $ 29,459 $ 16,977 $ 11,505 $ 977 Investments measured at NAV (c) Commingled equity funds 92 181 Other fixed income investments 541 32 Private equity funds 4,672 4,019 Real estate funds 2,650 2,493 Hedge funds 1,111 1,069 Total investments measured at NAV 9,066 7,794 Receivables, net — 78 Total $ 40,566 $ 37,331 (a) Cash and cash equivalents, equity securities and fixed income securities included derivative assets and liabilities whose fair values were not material as of December 31, 2020 and 2019. LMIMCo’s investment policies restrict the use of derivatives to either establish long or short exposures for purposes consistent with applicable investment mandate guidelines or to hedge risks to the extent of a plan’s current exposure to such risks. Most derivative transactions are settled on a daily basis. (b) Level 3 investments include $1.7 billion at December 31, 2020 and $857 million at December 31, 2019 related to the buy-in contracts discussed above. (c) Certain investments that are valued using the NAV per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy and are included in the table to permit reconciliation of the fair value hierarchy to the aggregate postretirement benefit plan assets.
Estimated Future Benefit Payments	The following table presents estimated future benefit payments, which reflect expected future employee service, as of December 31, 2020 (in millions): 2021 2022 2023 2024 2025 2026 – 2030 Qualified defined benefit pension plans $ 2,290 $ 2,350 $ 2,440 $ 2,510 $ 2,570 $ 13,190 Retiree medical and life insurance plans 160 150 150 150 150 660

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Changes in Balance of Accumulated Other Comprehensive Loss, Net of Income Taxes	Changes in the balance of AOCL, net of income taxes, consisted of the following (in millions): Postretirement Benefit Plans (a) Other, net AOCL Balance at December 31, 2017 $ (12,559) $ 20 $ (12,539) Other comprehensive loss before reclassifications (501) (105) (606) Amounts reclassified from AOCL Recognition of net actuarial losses 1,455 — 1,455 Amortization of net prior service credits (253) — (253) Other — 30 30 Total reclassified from AOCL 1,202 30 1,232 Total other comprehensive (loss) income 701 (75) 626 Reclassification of income tax effects from tax reform (b) (2,396) (12) (2,408) Balance at December 31, 2018 (14,254) (67) (14,321) Other comprehensive loss before reclassifications (2,182) 18 (2,164) Amounts reclassified from AOCL Recognition of net actuarial losses 1,148 — 1,148 Amortization of net prior service credits (240) — (240) Other — 23 23 Total reclassified from AOCL 908 23 931 Total other comprehensive income (loss) (1,274) 41 (1,233) Balance at December 31, 2019 (15,528) (26) (15,554) Other comprehensive income before reclassifications (1,067) 56 (1,011) Amounts reclassified from AOCL Recognition of net actuarial losses 689 — 689 Amortization of net prior service credits (249) — (249) Other — 4 4 Total reclassified from AOCL 440 4 444 Total other comprehensive income (627) 60 (567) Balance at December 31, 2020 $ (16,155) $ 34 $ (16,121) (a) AOCL related to postretirement benefit plans is shown net of tax benefits of $4.4 billion at December 31, 2020, $4.2 billion at December 31, 2019 and $3.9 billion at December 31, 2018. These tax benefits include amounts recognized on our income tax returns as current deductions and deferred income taxes, which will be recognized on our tax returns in future years. See “Note 10 – Income Taxes” and “Note 12 – Postretirement Benefit Plans” for more information on our income taxes and postretirement benefit plans.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Summary of Stock Based Compensation Activity Related to Nonvested RSUs	The following table summarizes activity related to nonvested RSUs: Number Weighted Average Nonvested at December 31, 2017 651 $ 220.21 Granted 406 353.99 Vested (470) 271.50 Forfeited (24) 282.07 Nonvested at December 31, 2018 563 $ 271.23 Granted 581 305.30 Vested (523) 269.00 Forfeited (21) 302.78 Nonvested at December 31, 2019 600 $ 305.06 Granted 533 383.99 Vested (383) 329.63 Forfeited (17) 349.02 Nonvested at December 31, 2020 733 $ 348.60

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring Basis	Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following (in millions): December 31, 2020 December 31, 2019 Total Level 1 Level 2 Total Level 1 Level 2 Assets Mutual funds $ 1,335 $ 1,335 $ — $ 1,363 $ 1,363 $ — U.S. Government securities 92 — 92 99 — 99 Other securities 555 341 214 319 171 148 Derivatives 52 — 52 18 — 18 Liabilities Derivatives 22 — 22 23 — 23 Assets measured at NAV Other commingled funds 20 19

Summary of Quarterly Informat_2

Summary of Quarterly Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Information	A summary of quarterly information is as follows (in millions, except per share data): 2020 Quarters (a) First Second (c) Third (d) Fourth (e) Net sales $ 15,651 $ 16,220 $ 16,495 $ 17,032 Operating profit 2,122 2,086 2,147 2,289 Net earnings from continuing operations 1,717 1,626 1,753 1,792 Net loss from discontinued operations — — (55) — Net earnings 1,717 1,626 1,698 1,792 Earnings per common share from continuing operations (b) : Basic 6.10 5.81 6.28 6.41 Diluted 6.08 5.79 6.25 6.38 Loss per common share from discontinued operations: Basic — — (0.20) — Diluted — — (0.20) — Basic earnings per common share (b) 6.10 5.81 6.08 6.41 Diluted earnings per common share (b) 6.08 5.79 6.05 6.38 2019 Quarters (a) First (f) Second Third (g) Fourth Net sales $ 14,336 $ 14,427 $ 15,171 $ 15,878 Operating profit 2,283 2,008 2,105 2,149 Net earnings 1,704 1,420 1,608 1,498 Basic earnings per common share (b) 6.03 5.03 5.70 5.32 Diluted earnings per common share (b) 5.99 5.00 5.66 5.29 (a) Quarters are typically 13 weeks in length but, due to our fiscal year ending on December 31, the number of weeks in a reporting period may vary slightly during the year and for comparable prior year periods. (b) The sum of the quarterly earnings per share amounts do not equal the earnings per share amounts included on our consolidated statements of earnings. The difference in 2020 and 2019 relates to the timing of our share repurchases. (c) The second quarter of 2020 includes a non-cash impairment charge of $128 million ($96 million, or $0.34 per share, after-tax) related to our equity method investee, AMMROC (see “Note 1 – Significant Accounting Policies”). (d) The third quarter of 2020 includes a $55 million ($0.20 per share) non-cash charge for discontinued operations resulting from the resolution of certain tax matters related to the former IS&GS business divested in 2016. (e) The fourth quarter of 2020 includes $27 million ($21 million, or $0.08 per share, after-tax) of severance charges (see “Note 16 – Severance Charges”). (f) The first quarter of 2019 includes a previously deferred non-cash gain of $51 million ($38 million, or $0.13 per share, after-tax) related to properties sold in 2015 as a result of completing our remaining obligations. The first quarter of 2019 also includes benefits of $75 million, or $0.26 per share, from additional tax deductions, based on proposed tax regulations released on March 4, 2019, which clarified that foreign military sales qualify as foreign derived intangible income. Approximately $65 million, or $0.23 per share, of the total benefit was recorded discretely because it relates to the prior year. (g) The third quarter of 2019 includes benefits of $62 million, or $0.22 per share, for additional tax deductions for the prior year, primarily attributable to foreign derived intangible income treatment based on proposed tax regulations released on March 4, 2019 and our change in tax accounting method.

Significant Accounting Polici_3

Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 31, 2020USD ($)$ / shares	Jun. 28, 2020USD ($)	Dec. 31, 2020USD ($)contract$ / shares	Dec. 31, 2019USD ($)$ / shares	Dec. 31, 2018USD ($)$ / shares
Significant Accounting Policies [Line Items]
Number of contract types | contract			3
Ending backlog			$ 147,100,000,000
Performance obligation satisfied in previous period			2,000,000,000	$ 2,200,000,000	$ 2,000,000,000
Independent research and development costs charged to cost of sales			$ 1,300,000,000	1,300,000,000	1,300,000,000
Weighted average remaining contractual life, vested			3 years
Depreciation			$ 853,000,000	794,000,000	759,000,000
Capitalized internal-use software, net			686,000,000	511,000,000
Capitalized internal-use software accumulated amortization			2,200,000,000	2,200,000,000
Capitalized internal-use software amortization			166,000,000	111,000,000	106,000,000
Goodwill			$ 10,806,000,000	10,604,000,000	10,769,000,000
Time period environmental costs and recovery of environmental costs are projected over			20 years
Fair value of trading securities			$ 2,000,000,000	1,800,000,000
Net gains (losses) on marketable securities			231,000,000	233,000,000	(67,000,000)
Total equity method investments			784,000,000	1,200,000,000
Net earnings from equity method investments			163,000,000	154,000,000	119,000,000
Equity method investee impairment			128,000,000	0	0
Interest rate swaps | Designated as hedges
Significant Accounting Policies [Line Items]
Aggregate notional amount of derivatives			572,000,000	750,000,000
Foreign currency contracts | Designated as hedges
Significant Accounting Policies [Line Items]
Aggregate notional amount of derivatives			3,400,000,000	3,800,000,000
AMMROC
Significant Accounting Policies [Line Items]
Total equity method investments	$ 307,000,000
Proceeds from sale of equity method investments	307,000,000
Equity method investee impairment	128,000,000	$ 128,000,000			110,000,000
Equity method investee impairment, net of tax	$ 96,000,000
Equity method investee impairment (in dollars per share) | $ / shares	$ 0.34
Space
Significant Accounting Policies [Line Items]
Goodwill			1,760,000,000	1,586,000,000	1,585,000,000
Net earnings from equity method investments			$ 135,000,000	145,000,000	210,000,000
Minimum
Significant Accounting Policies [Line Items]
Acquired finite-lived intangible assets are amortized			3 years
Minimum | Customer programs
Significant Accounting Policies [Line Items]
Acquired finite-lived intangible assets are amortized			9 years
Minimum | Buildings
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated life			10 years
Minimum | Machinery and equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated life			5 years
Minimum | Capitalized Software
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated life			2 years
Maximum
Significant Accounting Policies [Line Items]
Acquired finite-lived intangible assets are amortized			20 years
Maximum | Customer programs
Significant Accounting Policies [Line Items]
Acquired finite-lived intangible assets are amortized			20 years
Maximum | Buildings
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated life			40 years
Maximum | Machinery and equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated life			15 years
Maximum | Capitalized Software
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated life			6 years
Ground Based Radar
Significant Accounting Policies [Line Items]
Commercial satellite cumulative losses on development			$ 250,000,000
EADGE-T
Significant Accounting Policies [Line Items]
Commercial satellite cumulative losses on development			260,000,000
Warrior Capability Sustainment Program
Significant Accounting Policies [Line Items]
Commercial satellite cumulative losses on development			$ 140,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Over the next 12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage			39.00%
Expected time of satisfaction			12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Over the next 24 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage			61.00%
Expected time of satisfaction			24 months
Contracts Accounted for under Percentage of Completion
Significant Accounting Policies [Line Items]
Increase in operating profit due to profit rate adjustments			$ 1,800,000,000	1,900,000,000	1,900,000,000
Increase in net earnings due to profit rate adjustments			$ 1,500,000,000	$ 1,500,000,000	$ 1,500,000,000
Increase in diluted earnings per common share due to profit rate (in dollars per share) | $ / shares			$ 5.33	$ 5.29	$ 5.23

Strategic Action (Details)

Strategic Action (Details) - Aerojet Rocketdyne Holdings, Inc. $ / shares in Units, $ in Millions	Dec. 20, 2020USD ($)$ / shares
Business Acquisition [Line Items]
Manufacturer price (in dollars per share) | $ / shares	$ 56
Expected to be reduced price (in dollars per share) | $ / shares	$ 51
Post-dividend value	$ 4,600
Total transaction value	4,400
Termination fee	$ 150

Earnings Per Share (Detail)

Earnings Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Weighted average common shares outstanding for basic computations (in shares)	280,000,000	282,000,000	284,500,000
Weighted average dilutive effect of equity awards (in shares)	1,200,000	1,800,000	2,300,000
Weighted average common shares outstanding for diluted computations (in shares)	281,200,000	283,800,000	286,800,000
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangibles - Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 10,604	$ 10,769
Distributed Energy Solutions divestiture		(175)
Acquisitions	189
Other	13	10
Goodwill, ending balance	10,806	10,604
Aeronautics
Goodwill [Roll Forward]
Goodwill, beginning balance	171	171
Distributed Energy Solutions divestiture		0
Acquisitions	16
Other	0	0
Goodwill, ending balance	187	171
MFC
Goodwill [Roll Forward]
Goodwill, beginning balance	2,089	2,262
Distributed Energy Solutions divestiture		(175)
Acquisitions	0
Other	2	2
Goodwill, ending balance	2,091	2,089
RMS
Goodwill [Roll Forward]
Goodwill, beginning balance	6,758	6,751
Distributed Energy Solutions divestiture		0
Acquisitions	0
Other	10	7
Goodwill, ending balance	6,768	6,758
Space
Goodwill [Roll Forward]
Goodwill, beginning balance	1,586	1,585
Distributed Energy Solutions divestiture		0
Acquisitions	173
Other	1	1
Goodwill, ending balance	$ 1,760	$ 1,586

Goodwill and Acquired Intangi_4

Goodwill and Acquired Intangibles - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization expense for acquired finite lived intangible assets	$ 271	$ 284	$ 296
Amortization of finite lived intangible assets in 2021	290
Amortization of finite lived intangible assets in 2022	252
Amortization of finite lived intangible assets in 2023	249
Amortization of finite lived intangible assets in 2024	245
Amortization of finite lived intangible assets in 2025	223
Amortization of finite lived intangible assets after 2025	$ 866
Minimum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	20 years
Customer programs | Minimum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	9 years
Customer programs | Maximum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	20 years
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	4 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	10 years
Other | Minimum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	3 years
Other | Maximum
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets are amortized	10 years

Goodwill and Acquired Intangi_5

Goodwill and Acquired Intangibles - Acquired Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived, Gross Carrying Amount	$ 3,635	$ 3,581
Finite-Lived, Accumulated Amortization	(1,510)	(1,255)
Finite-Lived, Net Carrying Amount	2,125	2,326
Indefinite-Lived, Carrying Amount	887	887
Total acquired intangibles	4,522	4,468
Total acquired intangibles, Net Carrying Amount	3,012	3,213
Customer programs
Finite-Lived Intangible Assets [Line Items]
Finite-Lived, Gross Carrying Amount	3,184	3,184
Finite-Lived, Accumulated Amortization	(1,199)	(967)
Finite-Lived, Net Carrying Amount	1,985	2,217
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-Lived, Gross Carrying Amount	366	344
Finite-Lived, Accumulated Amortization	(287)	(243)
Finite-Lived, Net Carrying Amount	79	101
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived, Gross Carrying Amount	85	53
Finite-Lived, Accumulated Amortization	(24)	(45)
Finite-Lived, Net Carrying Amount	$ 61	$ 8

Information on Business Segme_3

Information on Business Segments - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)segment	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of business segments | segment	4
Equity method investments	$ 784	$ 1,200
Net gain on divestiture of business segment	$ (55)	$ 0	$ 0
F-35 Program | Net Sales | Product Concentration Risk | Aeronautics
Segment Reporting Information [Line Items]
Net sales for the F-35 program representing total consolidated net sales (as a percent)	28.00%	27.00%	27.00%
United Launch Alliance
Segment Reporting Information [Line Items]
Percentage of ownership interest in affiliated entity	50.00%
Equity method investments	$ 691	$ 709

Information on Business Segme_4

Information on Business Segments - Summary of Financial Information for Each Business Segment (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
	Jul. 31, 2020	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales
Net sales		$ 17,032	$ 16,495	$ 16,220	$ 15,651	$ 15,878	$ 15,171	$ 14,427	$ 14,336	$ 65,398	$ 59,812	$ 53,762
Operating profit
Operating profit		$ 2,289	$ 2,147	2,086	$ 2,122	$ 2,149	$ 2,105	$ 2,008	2,283	8,644	8,545	7,334
Unallocated items
Equity method investee impairment										128	0	0
Gain on property sale										0	51	0
Net gain on divestiture of business segment										(55)	0	0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Distributed Energy Solutions
Unallocated items
Net gain on divestiture of business segment											34
AMMROC
Unallocated items
Equity method investee impairment	$ 128			128								110
Equity method investment impairment, after tax				$ 96						96
Land
Unallocated items
Gain on property sale									$ 51		51
Operating Segments
Net sales
Net sales										65,398	59,812	53,762
Operating profit
Operating profit										7,152	6,574	5,877
Segment Reconciling Items
Unallocated items
FAS/CAS operating adjustment										1,876	2,049	1,803
Stock-based compensation										(221)	(189)	(173)
Severance and restructuring Charges										(27)	0	(96)
Other, net										(136)	111	(77)
Total unallocated, net										1,492	1,971	1,457
Aeronautics
Net sales
Net sales										26,266	23,693	21,242
Aeronautics | Operating Segments
Net sales
Net sales										26,266	23,693	21,242
Operating profit
Operating profit										2,843	2,521	2,272
Missiles and Fire Control
Net sales
Net sales										11,257	10,131	8,462
Missiles and Fire Control | Operating Segments
Net sales
Net sales										11,257	10,131	8,462
Operating profit
Operating profit										1,545	1,441	1,248
Rotary and Mission Systems
Net sales
Net sales										15,995	15,128	14,250
Rotary and Mission Systems | Operating Segments
Net sales
Net sales										15,995	15,128	14,250
Operating profit
Operating profit										1,615	1,421	1,302
Space
Net sales
Net sales										11,880	10,860	9,808
Space | Operating Segments
Net sales
Net sales										11,880	10,860	9,808
Operating profit
Operating profit										$ 1,149	$ 1,191	$ 1,055

Information on Business Segme_5

Information on Business Segments - FAS/CAS Pension Adjustment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Non-operating FAS pension income (expense)	$ 219	$ (577)	$ (801)
Net FAS/CAS pension adjustment	2,095	1,472	1,002
Segment Reconciling Items
Segment Reporting Information [Line Items]
FAS pension service cost	(101)	(516)	(630)
Less: CAS pension cost	1,977	2,565	2,433
FAS/CAS operating adjustment	1,876	2,049	1,803
Qualified Defined Benefit Pension Plans
Segment Reporting Information [Line Items]
FAS pension income (expense)	(118)	1,093	1,431
FAS pension service cost	(101)	(516)	(630)
Qualified Plan | Qualified Defined Benefit Pension Plans
Segment Reporting Information [Line Items]
FAS pension income (expense)	$ 118	$ (1,093)	$ (1,431)

Information on Business Segme_6

Information on Business Segments - Summary of Financial Information for Each Business Segment, Intersegment Sale, Depreciation and Capital Expenditures (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 17,032	$ 16,495	$ 16,220	$ 15,651	$ 15,878	$ 15,171	$ 14,427	$ 14,336	$ 65,398	$ 59,812	$ 53,762
Depreciation and amortization									1,290	1,189	1,161
Capital expenditures									1,766	1,484	1,278
Aeronautics
Segment Reporting Information [Line Items]
Net sales									26,266	23,693	21,242
Missiles and Fire Control
Segment Reporting Information [Line Items]
Net sales									11,257	10,131	8,462
Rotary and Mission Systems
Segment Reporting Information [Line Items]
Net sales									15,995	15,128	14,250
Space
Segment Reporting Information [Line Items]
Net sales									11,880	10,860	9,808
Intersegment sales
Segment Reporting Information [Line Items]
Net sales									3,085	2,956	2,539
Intersegment sales | Aeronautics
Segment Reporting Information [Line Items]
Net sales									243	217	120
Intersegment sales | Missiles and Fire Control
Segment Reporting Information [Line Items]
Net sales									562	515	423
Intersegment sales | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Net sales									1,903	1,872	1,759
Intersegment sales | Space
Segment Reporting Information [Line Items]
Net sales									377	352	237
Operating Segments
Segment Reporting Information [Line Items]
Net sales									65,398	59,812	53,762
Depreciation and amortization									1,181	1,119	1,096
Capital expenditures									1,639	1,356	1,214
Operating Segments | Aeronautics
Segment Reporting Information [Line Items]
Net sales									26,266	23,693	21,242
Depreciation and amortization									348	318	304
Capital expenditures									534	526	460
Operating Segments | Missiles and Fire Control
Segment Reporting Information [Line Items]
Net sales									11,257	10,131	8,462
Depreciation and amortization									138	124	105
Capital expenditures									391	300	244
Operating Segments | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Net sales									15,995	15,128	14,250
Depreciation and amortization									476	464	458
Capital expenditures									311	272	255
Operating Segments | Space
Segment Reporting Information [Line Items]
Net sales									11,880	10,860	9,808
Depreciation and amortization									219	213	229
Capital expenditures									403	258	255
Corporate activities
Segment Reporting Information [Line Items]
Depreciation and amortization									109	70	65
Capital expenditures									$ 127	$ 128	$ 64

Information on Business Segme_7

Information on Business Segments - Income Statement Information For Each Segment (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 17,032	$ 16,495	$ 16,220	$ 15,651	$ 15,878	$ 15,171	$ 14,427	$ 14,336	$ 65,398	$ 59,812	$ 53,762
Aeronautics
Segment Reporting Information [Line Items]
Net sales									26,266	23,693	21,242
MFC
Segment Reporting Information [Line Items]
Net sales									11,257	10,131	8,462
RMS
Segment Reporting Information [Line Items]
Net sales									15,995	15,128	14,250
Space
Segment Reporting Information [Line Items]
Net sales									11,880	10,860	9,808
United States
Segment Reporting Information [Line Items]
Net sales									49,012	43,281	38,606
United States | Aeronautics
Segment Reporting Information [Line Items]
Net sales									18,254	14,960	13,507
United States | MFC
Segment Reporting Information [Line Items]
Net sales									8,415	7,666	6,272
United States | RMS
Segment Reporting Information [Line Items]
Net sales									12,009	11,306	10,557
United States | Space
Segment Reporting Information [Line Items]
Net sales									10,334	9,349	8,270
Asia Pacific
Segment Reporting Information [Line Items]
Net sales									5,176	5,826	5,280
Asia Pacific | Aeronautics
Segment Reporting Information [Line Items]
Net sales									3,162	3,882	3,335
Asia Pacific | MFC
Segment Reporting Information [Line Items]
Net sales									280	420	427
Asia Pacific | RMS
Segment Reporting Information [Line Items]
Net sales									1,666	1,451	1,433
Asia Pacific | Space
Segment Reporting Information [Line Items]
Net sales									68	73	85
Europe
Segment Reporting Information [Line Items]
Net sales									6,334	5,928	5,403
Europe | Aeronautics
Segment Reporting Information [Line Items]
Net sales									3,283	3,224	2,837
Europe | MFC
Segment Reporting Information [Line Items]
Net sales									767	516	321
Europe | RMS
Segment Reporting Information [Line Items]
Net sales									806	769	829
Europe | Space
Segment Reporting Information [Line Items]
Net sales									1,478	1,419	1,416
Middle East
Segment Reporting Information [Line Items]
Net sales									3,940	3,944	3,602
Middle East | Aeronautics
Segment Reporting Information [Line Items]
Net sales									1,344	1,465	1,380
Middle East | MFC
Segment Reporting Information [Line Items]
Net sales									1,749	1,481	1,404
Middle East | RMS
Segment Reporting Information [Line Items]
Net sales									847	979	781
Middle East | Space
Segment Reporting Information [Line Items]
Net sales									0	19	37
Other
Segment Reporting Information [Line Items]
Net sales									936	833	871
Other | Aeronautics
Segment Reporting Information [Line Items]
Net sales									223	162	183
Other | MFC
Segment Reporting Information [Line Items]
Net sales									46	48	38
Other | RMS
Segment Reporting Information [Line Items]
Net sales									667	623	650
Other | Space
Segment Reporting Information [Line Items]
Net sales									0	0	0
U.S. Government
Segment Reporting Information [Line Items]
Net sales									48,468	42,425	37,716
U.S. Government | Aeronautics
Segment Reporting Information [Line Items]
Net sales									18,175	14,776	13,321
U.S. Government | MFC
Segment Reporting Information [Line Items]
Net sales									8,404	7,524	6,088
U.S. Government | RMS
Segment Reporting Information [Line Items]
Net sales									11,596	10,803	10,083
U.S. Government | Space
Segment Reporting Information [Line Items]
Net sales									10,293	9,322	8,224
International
Segment Reporting Information [Line Items]
Net sales									16,386	16,531	15,156
International | Aeronautics
Segment Reporting Information [Line Items]
Net sales									8,012	8,733	7,735
International | MFC
Segment Reporting Information [Line Items]
Net sales									2,842	2,465	2,190
International | RMS
Segment Reporting Information [Line Items]
Net sales									3,986	3,822	3,693
International | Space
Segment Reporting Information [Line Items]
Net sales									1,546	1,511	1,538
U.S. commercial and other
Segment Reporting Information [Line Items]
Net sales									544	856	890
U.S. commercial and other | Aeronautics
Segment Reporting Information [Line Items]
Net sales									79	184	186
U.S. commercial and other | MFC
Segment Reporting Information [Line Items]
Net sales									11	142	184
U.S. commercial and other | RMS
Segment Reporting Information [Line Items]
Net sales									413	503	474
U.S. commercial and other | Space
Segment Reporting Information [Line Items]
Net sales									41	27	46
Fixed-price
Segment Reporting Information [Line Items]
Net sales									39,106	36,205	33,239
Fixed-price | Aeronautics
Segment Reporting Information [Line Items]
Net sales									18,477	17,239	15,719
Fixed-price | MFC
Segment Reporting Information [Line Items]
Net sales									7,587	6,449	5,653
Fixed-price | RMS
Segment Reporting Information [Line Items]
Net sales									10,795	10,382	9,975
Fixed-price | Space
Segment Reporting Information [Line Items]
Net sales									2,247	2,135	1,892
Cost-reimbursable
Segment Reporting Information [Line Items]
Net sales									26,292	23,607	20,523
Cost-reimbursable | Aeronautics
Segment Reporting Information [Line Items]
Net sales									7,789	6,454	5,523
Cost-reimbursable | MFC
Segment Reporting Information [Line Items]
Net sales									3,670	3,682	2,809
Cost-reimbursable | RMS
Segment Reporting Information [Line Items]
Net sales									5,200	4,746	4,275
Cost-reimbursable | Space
Segment Reporting Information [Line Items]
Net sales									9,633	8,725	7,916
Products
Segment Reporting Information [Line Items]
Net sales									54,928	50,053	45,005
Products | Aeronautics
Segment Reporting Information [Line Items]
Net sales									22,327	20,319	18,207
Products | MFC
Segment Reporting Information [Line Items]
Net sales									9,804	8,424	6,945
Products | RMS
Segment Reporting Information [Line Items]
Net sales									12,748	12,206	11,714
Products | Space
Segment Reporting Information [Line Items]
Net sales									10,049	9,104	8,139
Services
Segment Reporting Information [Line Items]
Net sales									10,470	9,759	8,757
Services | Aeronautics
Segment Reporting Information [Line Items]
Net sales									3,939	3,374	3,035
Services | MFC
Segment Reporting Information [Line Items]
Net sales									1,453	1,707	1,517
Services | RMS
Segment Reporting Information [Line Items]
Net sales									3,247	2,922	2,536
Services | Space
Segment Reporting Information [Line Items]
Net sales									$ 1,831	$ 1,756	$ 1,669

Information on Business Segme_8

Information on Business Segments - Total Assets and Customer Advances and Amounts In Excess Of Costs Incurred For Each Business Segment (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 50,710	$ 47,528
Operating Segments
Segment Reporting Information [Line Items]
Assets	39,355	38,734
Operating Segments | Aeronautics
Segment Reporting Information [Line Items]
Assets	9,903	9,109
Operating Segments | Missiles and Fire Control
Segment Reporting Information [Line Items]
Assets	4,966	5,030
Operating Segments | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Assets	18,035	18,751
Operating Segments | Space
Segment Reporting Information [Line Items]
Assets	6,451	5,844
Corporate activities
Segment Reporting Information [Line Items]
Assets	$ 11,355	$ 8,794

Receivables, net, Contract As_3

Receivables, net, Contract Assets and Contract Liabilities - Schedule of Receivables and Contract Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Receivables, net	$ 1,978	$ 2,337
Contract assets	9,545	9,094
Contract liabilities	$ 7,545	$ 7,054

Receivables, net, Contract As_4

Receivables, net, Contract Assets and Contract Liabilities - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
U.S. government receivables	$ 1,200
Receivables from other governments and commercial customers	1,978	$ 2,337
Contract assets, progress payments	39,700	33,000
Increase in contract assets	451	(378)	$ 1,480
Impairment loss	0	0
Increase in contract liability	491	563	(537)
Liability, revenue recognized	4,000	$ 3,900	$ 3,900
Other Governments and Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables from other governments and commercial customers	$ 735

Inventories - Schedule of Inven

Inventories - Schedule of Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Materials, spares and supplies	$ 612	$ 532
Work-in-process	2,693	2,783
Finished goods	240	304
Total inventories	$ 3,545	$ 3,619

Inventories - Additional Inform

Inventories - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Capitalized contract cost	$ 583	$ 493

Property, Plant and Equipment_3

Property, Plant and Equipment, net (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 18,149	$ 16,978
Less: accumulated depreciation and amortization	(10,936)	(10,387)
Total property, plant and equipment, net	7,213	6,591
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	142	136
Buildings
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	7,425	7,013
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	8,661	8,128
Construction in progress
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 1,921	$ 1,701

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease, right-of-use asset	$ 1,000
Operating lease, liability	1,115
Operating lease, liability, noncurrent	841
New ROU operating lease assets and liabilities entered into	$ 193
Weighted average remaining lease term	8 years 7 months 6 days
Weighted average discount rate	2.80%
Operating lease cost	$ 223	$ 239
Operating lease cost			$ 247
Cash payments	$ 210
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent

Leases Future Minimum Lease Com

Leases Future Minimum Lease Commitments (Details) $ in Millions	Dec. 31, 2020USD ($)
Leases [Abstract]
Total	$ 1,273
2021	300
2022	199
2023	156
2024	126
2025	89
Thereafter	403
Less: imputed interest	158
Total	$ 1,115

Income Taxes - Provision for Fe

Income Taxes - Provision for Federal & Foreign Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Operations	$ 1,292	$ 698	$ 975
One-time charge due to tax legislation	0	0	(6)
Deferred
Operations	21	235	(194)
One-time charge due to tax legislation	0	0	(37)
Total federal income tax expense	1,313	933	738
Foreign income tax expense (benefit):
Current	50	91	67
Deferred	(16)	(13)	(13)
Total foreign income tax expense	34	78	54
Total income tax expense	$ 1,347	$ 1,011	$ 792

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	Mar. 04, 2019	Sep. 29, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Total net state income tax expense				$ 197	$ 96	$ 83
Deduction for foreign derived intangible income enacted by the Tax Act, current and prior year				191	220
Foreign derived intangible income deduction related to prior year	$ 75	$ 62	$ 65	21	98
Recognized tax benefit				0	15	$ 61
Unrecognized tax benefits				0	0
Federal and foreign income tax payments made, net of refunds received				$ 1,400	$ 940

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Expense Computed Using U.S. Statutory Federal Tax Rate to Actual Income Tax Expense (Details) - USD ($) $ in Millions	Mar. 04, 2019	Sep. 29, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amount
Income tax expense at the U.S. federal statutory tax rate				$ 1,729	$ 1,521	$ 1,226
Foreign derived intangible income deduction				(170)	(122)	(61)
Research and development tax credit				(97)	(148)	(138)
Tax deductible dividends				(64)	(62)	(59)
Excess tax benefits for share-based payment awards				(52)	(63)	(55)
Tax accounting method change				0	(15)	(61)
Deferred tax write-down and transition tax				0	0	(43)
Other, net				1	(100)	(17)
Total income tax expense				$ 1,347	$ 1,011	$ 792
Rate
Income tax expense at the U.S. federal statutory tax rate				21.00%	21.00%	21.00%
Foreign derived intangible income deduction				(2.10%)	(1.70%)	(1.00%)
Research and development tax credit				(1.20%)	(2.00%)	(2.40%)
Tax deductible dividends				(0.80%)	(0.90%)	(1.00%)
Excess tax benefits for share-based payment awards				(0.60%)	(0.90%)	(0.90%)
Tax accounting method change				0.00%	(0.20%)	(1.00%)
Deferred tax write-down and transition tax				0	0	(0.007)
Other, net				0.10%	(1.30%)	(0.40%)
Income tax expense				16.40%	14.00%	13.60%
Foreign derived intangible income deduction related to prior year	$ 75	$ 62	$ 65	$ 21	$ 98

Income Taxes - Components of Fe

Income Taxes - Components of Federal and Foreign Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets related to:
Accrued compensation and benefits	$ 926	$ 659
Pensions	2,994	3,057
Contract accounting methods	392	349
Foreign company operating losses and credits	51	49
Other	509	416
Valuation allowance	(13)	(28)
Deferred tax assets, net	4,859	4,502
Deferred tax liabilities related to:
Goodwill and purchased intangibles	363	330
Property, plant and equipment	481	340
Exchanged debt securities and other	547	525
Deferred tax liabilities	1,391	1,195
Net deferred tax assets	$ 3,468	$ 3,307

Debt - Long Term Debt (Details)

Debt - Long Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Oct. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 13,299			$ 13,812
Less: unamortized discounts and issuance costs	(1,130)			(1,158)
Total debt, net	12,169			12,654
Less: current portion	(500)			(1,250)
Long-term debt, net	$ 11,669			11,404
2.50% due 2020
Debt Instrument [Line Items]
Interest rate	2.50%	250.00%	2.50%
Total debt	$ 0			1,250
3.35% due 2021
Debt Instrument [Line Items]
Interest rate	3.35%		3.35%
Total debt	$ 500			900
3.10% due 2023
Debt Instrument [Line Items]
Interest rate	3.10%
Total debt	$ 500			500
2.90% due 2025
Debt Instrument [Line Items]
Interest rate	2.90%
Total debt	$ 750			750
3.55% due 2026
Debt Instrument [Line Items]
Interest rate	3.55%
Total debt	$ 2,000			2,000
1.85% due 2030
Debt Instrument [Line Items]
Interest rate	1.85%
Total debt	$ 400			0
3.60% due 2035
Debt Instrument [Line Items]
Interest rate	3.60%
Total debt	$ 500			500
4.50% and 6.15% due 2036
Debt Instrument [Line Items]
Total debt	$ 1,054			1,054
4.50% and 6.15% due 2036 | Minimum
Debt Instrument [Line Items]
Interest rate	4.50%
4.50% and 6.15% due 2036 | Maximum
Debt Instrument [Line Items]
Interest rate	615.00%
4.07% due 2042
Debt Instrument [Line Items]
Interest rate	4.07%
Total debt	$ 1,336			1,336
3.80% due 2045
Debt Instrument [Line Items]
Interest rate	3.80%
Total debt	$ 1,000			1,000
4.70% due 2046
Debt Instrument [Line Items]
Interest rate	4.70%
Total debt	$ 1,326			1,326
2.80% due 2050
Debt Instrument [Line Items]
Interest rate	2.80%
Total debt	$ 750			0
4.09% due 2052
Debt Instrument [Line Items]
Interest rate	4.09%
Total debt	$ 1,578			1,578
Other notes with rates from 4.85% to 9.13%, due 2022 to 2041
Debt Instrument [Line Items]
Total debt	$ 1,605			$ 1,618
Other notes with rates from 4.85% to 9.13%, due 2022 to 2041 | Minimum
Debt Instrument [Line Items]
Interest rate	4.85%
Other notes with rates from 4.85% to 9.13%, due 2022 to 2041 | Maximum
Debt Instrument [Line Items]
Interest rate	9.13%

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($)	1 Months Ended				12 Months Ended
	Oct. 31, 2020	Jun. 30, 2020	May 31, 2020	Nov. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Repayments of debt					$ 1,650,000,000	$ 900,000,000	$ 750,000,000
Interest payments excluding capitalized interest					567,000,000	625,000,000	$ 635,000,000
Short term borrowings due within one year					500,000,000	1,250,000,000
Commercial paper borrowings					0
Senior Notes
Debt Instrument [Line Items]
Amount of issued debt			$ 1,200,000,000
Debt instrument, redemption price, percentage			100.00%
Five Year Revolving Credit Facility | Unsecured Debt
Debt Instrument [Line Items]
Line of credit facility					2,500,000,000
Additional amount to increase credit facility, granted at banks' discretion					500,000,000
Line of credit facility, amount outstanding					$ 0	$ 0
1.85% due 2030 | Senior Notes
Debt Instrument [Line Items]
Amount of issued debt			$ 400,000,000
Interest rate			1.85%
2.8% due 2050 | Senior Notes
Debt Instrument [Line Items]
Amount of issued debt			$ 750,000,000
Interest rate			2.80%
2.50% due 2020
Debt Instrument [Line Items]
Amount of issued debt		$ 1,250,000,000
Interest rate	250.00%	2.50%			2.50%
Repayments of debt	$ 500,000,000	$ 750,000,000
3.35% due 2021
Debt Instrument [Line Items]
Amount of issued debt		$ 900,000,000
Interest rate		3.35%			3.35%
Repayments of debt		$ 400,000,000
4.25% due 2019
Debt Instrument [Line Items]
Interest rate				4.25%
Repayments of debt				$ 900,000,000

Postretirement Benefit Plans -

Postretirement Benefit Plans - Schedule of Net Periodic Benefit Costs (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Qualified Defined  Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 101	$ 516	$ 630
Interest cost	1,538	1,806	1,740
Expected return on plan assets	(2,264)	(2,300)	(2,395)
Recognized net actuarial losses (gains)	849	1,404	1,777
Amortization of net prior service (credit) cost	(342)	(333)	(321)
Total net periodic benefit cost (income)	(118)	1,093	1,431
Retiree Medical and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	13	14	19
Interest cost	70	97	91
Expected return on plan assets	(127)	(110)	(135)
Recognized net actuarial losses (gains)	(4)	2	5
Amortization of net prior service (credit) cost	39	42	15
Total net periodic benefit cost (income)	$ (9)	$ 45	$ (5)

Postretirement Benefit Plans _2

Postretirement Benefit Plans - Reconciliation of Benefit Obligations, Plan Assets, and Unfunded or Funded Status (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in plan assets
Beginning balance at fair value	$ 37,331
Ending balance at fair value	40,566	$ 37,331
Qualified Defined  Benefit Pension Plans
Change in benefit obligation
Beginning balance	48,674	43,305
Service cost	101	516	$ 630
Interest cost	1,538	1,806	1,740
Benefits paid	(2,188)	(2,294)
Settlements	(1,392)	(1,933)
Actuarial losses (gains)	5,036	6,403
Changes in longevity assumptions	(426)	860
Plan amendments and curtailments	9	11
Medicare Part D subsidy	0	0
Participants’ contributions	0	0
Ending balance	51,352	48,674	43,305
Change in plan assets
Beginning balance at fair value	35,442	32,002
Actual return on plan assets	5,594	6,667
Benefits paid	(2,188)	(2,294)
Settlements	(1,392)	(1,933)
Company contributions	1,025	1,000
Medicare Part D subsidy	0	0
Participants’ contributions	0	0
Ending balance at fair value	38,481	35,442	32,002
Unfunded status of the plans	(12,871)	(13,232)
Retiree Medical and Life Insurance Plans
Change in benefit obligation
Beginning balance	2,226	2,348
Service cost	13	14	19
Interest cost	70	97	91
Benefits paid	(220)	(229)
Settlements	0	0
Actuarial losses (gains)	135	(1)
Changes in longevity assumptions	(18)	(70)
Plan amendments and curtailments	(8)	(6)
Medicare Part D subsidy	3	2
Participants’ contributions	70	71
Ending balance	2,271	2,226	2,348
Change in plan assets
Beginning balance at fair value	1,889	1,644
Actual return on plan assets	298	342
Benefits paid	(220)	(229)
Settlements	0	0
Company contributions	45	59
Medicare Part D subsidy	3	2
Participants’ contributions	70	71
Ending balance at fair value	2,085	1,889	$ 1,644
Unfunded status of the plans	$ (186)	$ (337)

Postretirement Benefit Plans _3

Postretirement Benefit Plans - Additional Information (Detail) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2020USD ($)retiree	Dec. 31, 2020USD ($)retiree	Dec. 31, 2019USD ($)retiree	Dec. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
Assets set aside expected to be used to pay obligations of defined benefit pension plans and retiree medical and life insurance plans	$ 40,566	$ 40,566	$ 37,331
Aggregate liability for postemployment plans	42	42	42
Expected contribution, next year	1,000	$ 1,000
Hedge funds | Minimum
Defined Benefit Plan Disclosure [Line Items]
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period		1 month
Commingled equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period		90 days
Private equity funds | Minimum
Defined Benefit Plan Disclosure [Line Items]
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period		8 years
Private equity funds | Maximum
Defined Benefit Plan Disclosure [Line Items]
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period		12 years
Real estate funds | Minimum
Defined Benefit Plan Disclosure [Line Items]
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period		8 years
Real estate funds | Maximum
Defined Benefit Plan Disclosure [Line Items]
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period		10 years
Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plan, liabilities	1,400	$ 1,400	1,400
Assets set aside expected to be used to pay obligations of defined benefit pension plans and retiree medical and life insurance plans	877	877	657
Unrecognized net actuarial losses	718	718	641
Unrecognized prior service credit		21	34
Benefit plan expense		59	108	$ 123
Qualified Defined  Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation for defined benefit pension plans	51,300	51,300	48,600
Assets set aside expected to be used to pay obligations of defined benefit pension plans and retiree medical and life insurance plans	38,481	38,481	35,442	32,002
Unrecognized net actuarial losses	(21,040)	(21,040)	(20,609)
Increase (decrease) in projected benefit obligations due to a change in discount rate		4,900	5,800
Changes in longevity assumptions		426	(860)
Actual return on plan assets		$ 5,594	6,667
Actual return on plan assets (percent)		16.50%
Expected return on plan assets		$ 2,264	$ 2,300	$ 2,395
Expected long-term rate of return on assets		7.00%	7.00%	7.00%
Company contributions		$ 1,025	$ 1,000
Irrevocable Group Annuity Contract
Defined Benefit Plan Disclosure [Line Items]
Cash payment for contract	$ 1,400		$ 1,900
Irrevocable Group Annuity Contract | Qualified Defined  Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Number of retirees | retiree	13,500		20,000
Reimbursement Of Future Benefit Payments Plan
Defined Benefit Plan Disclosure [Line Items]
Cash payment for contract		$ 793
Reimbursement Of Future Benefit Payments Plan | Qualified Defined  Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Number of retirees | retiree		2,500

Postretirement Benefit Plans _4

Postretirement Benefit Plans - Amounts Recognized on Balance Sheets Related to Qualified Defined Benefit Pension Plans and Retiree Medical and Life Insurance Plans (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Accrued postretirement benefit liabilities	$ (12,874)	$ (13,234)
Accumulated other comprehensive loss (pre-tax) related to:
Accumulated other comprehensive loss, after tax	16,200	15,500
Qualified Defined  Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension asset	3	2
Accrued postretirement benefit liabilities	(12,874)	(13,234)
Accumulated other comprehensive loss (pre-tax) related to:
Net actuarial losses	21,040	20,609
Prior service (credit) cost	(1,235)	(1,586)
Total	19,805	19,023
Accumulated other comprehensive loss, after tax	15,600	15,000
Adjustments, before tax	19,805	19,023
Retiree Medical and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension asset	0	0
Accrued postretirement benefit liabilities	(186)	(337)
Accumulated other comprehensive loss (pre-tax) related to:
Net actuarial losses	(119)	(69)
Prior service (credit) cost	73	120
Total	(46)	51
Accumulated other comprehensive loss, after tax	(37)	39
Adjustments, before tax	(46)	51
Other Pension Plan
Accumulated other comprehensive loss (pre-tax) related to:
Total	782	667
Accumulated other comprehensive loss, after tax	617	527
Adjustments, before tax	$ 782	$ 667

Postretirement Benefit Plans _5

Postretirement Benefit Plans - Amounts Recognized in Other Comprehensive Income (Loss) Related to Postretirement Benefit Plans, Net of Tax (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial gains and losses - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	$ (1,066)	$ (2,178)	$ (416)
Net prior service credit and cost - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	(1)	(4)	(85)
Incurred but Not Yet Recognized in Net Periodic Benefit Cost	(1,067)	(2,182)	(501)
Actuarial gains and losses - Recognition of Previously Deferred Amounts	689	1,148	1,455
Net prior service credit and cost - Recognition of Previously Deferred Amounts	(249)	(240)	(253)
Recognition of Previously Deferred Amounts	440	908	1,202
Qualified defined benefit pension plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial gains and losses - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	(1,005)	(2,283)	(570)
Net prior service credit and cost - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	(7)	(8)	(6)
Actuarial gains and losses - Recognition of Previously Deferred Amounts	668	1,104	1,396
Net prior service credit and cost - Recognition of Previously Deferred Amounts	(269)	(263)	(255)
Retiree medical and life insurance plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial gains and losses - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	43	238	71
Net prior service credit and cost - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	6	4	(79)
Actuarial gains and losses - Recognition of Previously Deferred Amounts	(3)	2	4
Net prior service credit and cost - Recognition of Previously Deferred Amounts	30	33	12
Other plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Actuarial gains and losses - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	(104)	(133)	83
Net prior service credit and cost - Incurred but Not Yet Recognized in Net Periodic Benefit Cost	0	0	0
Actuarial gains and losses - Recognition of Previously Deferred Amounts	24	42	55
Net prior service credit and cost - Recognition of Previously Deferred Amounts	$ (10)	$ (10)	$ (10)

Postretirement Benefit Plans _6

Postretirement Benefit Plans - Actuarial Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Qualified Defined  Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	2.50%	3.25%	4.25%
Expected long-term rate of return on assets	7.00%	7.00%	7.00%
Retiree Medical and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	2.375%	3.25%	4.25%
Expected long-term rate of return on assets	7.00%	7.00%	7.00%
Health care trend rate assumed for next year	7.75%	8.00%	8.25%
Ultimate health care trend rate	4.50%	4.50%	5.00%

Postretirement Benefit Plans _7

Postretirement Benefit Plans - Asset Allocations of Postretirement Benefit Plans (Detail)	Dec. 31, 2020
Minimum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	0.00%
Minimum | Equity
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	15.00%
Minimum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	10.00%
Minimum | Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	0.00%
Minimum | Real estate funds
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	0.00%
Minimum | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	0.00%
Minimum | Commodities
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	0.00%
Maximum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	20.00%
Maximum | Equity
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	65.00%
Maximum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	60.00%
Maximum | Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	15.00%
Maximum | Real estate funds
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	10.00%
Maximum | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	20.00%
Maximum | Commodities
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation Ranges	15.00%

Postretirement Benefit Plans _8

Postretirement Benefit Plans - Qualified Defined Benefit Pension Plans and Retiree Medical and Life Insurance Plans by Asset Category (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	$ 40,566	$ 37,331
Buy-In Contract
Defined Benefit Plan Disclosure [Line Items]
Plan with benefit obligations equal to plan assets	1,700	857
Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	31,500	29,459
Level 1, 2 and 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,109	1,961
Level 1, 2 and 3 | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	7,535	7,189
Level 1, 2 and 3 | International equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	6,844	7,244
Level 1, 2 and 3 | Commingled equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,671	1,933
Level 1, 2 and 3 | Corporate debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	5,732	5,208
Level 1, 2 and 3 | U.S. Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	2,506	2,260
Level 1, 2 and 3 | U.S. Government-sponsored enterprise securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	230	530
Level 1, 2 and 3 | Other fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	5,873	3,134
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	15,891	16,977
Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,109	1,961
Level 1 | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	7,467	7,182
Level 1 | International equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	6,836	7,217
Level 1 | Commingled equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	442	582
Level 1 | Corporate debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Level 1 | U.S. Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Level 1 | U.S. Government-sponsored enterprise securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Level 1 | Other fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	37	35
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	13,765	11,505
Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Level 2 | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	8	0
Level 2 | International equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	23
Level 2 | Commingled equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,228	1,351
Level 2 | Corporate debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	5,730	5,206
Level 2 | U.S. Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	2,506	2,260
Level 2 | U.S. Government-sponsored enterprise securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	230	530
Level 2 | Other fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	4,063	2,135
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,844	977
Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Level 3 | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	60	7
Level 3 | International equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	8	4
Level 3 | Commingled equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1	0
Level 3 | Corporate debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	2	2
Level 3 | U.S. Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Level 3 | U.S. Government-sponsored enterprise securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	0	0
Level 3 | Other fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,773	964
NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	9,066	7,794
NAV | Other fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	541	32
NAV | Commingled equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	92	181
NAV | Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	4,672	4,019
NAV | Real estate funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	2,650	2,493
NAV | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	1,111	1,069
NAV | Receivables, net
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	$ 0	$ 78

Postretirement Benefit Plans _9

Postretirement Benefit Plans - Estimated Future Benefit Payments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Qualified Defined  Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Company contributions	$ 1,025	$ 1,000
Expected Future Benefit Payment [Abstract]
2021	2,290
2022	2,350
2023	2,440
2024	2,510
2025	2,570
2026 – 2030	13,190
Retiree Medical and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Company contributions	45	$ 59
Expected Future Benefit Payment [Abstract]
2021	160
2022	150
2023	150
2024	150
2025	150
2026 – 2030	$ 660

Postretirement Benefit Plans_10

Postretirement Benefit Plans - Defined Contribution Plan (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Contributions made to defined contribution plans	$ 984	$ 741	$ 658
Shares of our stock held in defined contribution plans we sponsor (in shares)	30.5	31.9

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 24, 2018	Mar. 25, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Sep. 25, 2020
Shareholders Equity [Line Items]
Common stock, shares authorized (in shares)	1,500,000,000				1,500,000,000								1,500,000,000	1,500,000,000
Preferred stock, shares authorized (in shares)	50,000,000				50,000,000								50,000,000	50,000,000
Common stock, shares issued and outstanding (in shares)	280,000,000				281,000,000								280,000,000	281,000,000
Common stock, shares outstanding (in shares)	279,000,000				280,000,000								279,000,000	280,000,000
Preferred stock, shares issued (in shares)	0				0								0	0
Preferred stock, shares outstanding (in shares)	0				0								0	0
Stock repurchased (in shares)													3,000,000	3,500,000	4,700,000
Repurchases of common stock													$ 1,100,000,000	$ 1,200,000,000	$ 1,492,000,000
Accelerate Share Repurchase (ASR) authorized amount																$ 1,300,000,000
Cash paid for repurchases of common stock													$ 1,100,000,000	$ 1,200,000,000	1,492,000,000
Average price paid per share (in dollars per share)													$ 347.16
Remaining amount authorized (in shares)	$ 3,000,000,000												$ 3,000,000,000
Common stock, par value (in dollars per share)	$ 1				$ 1								$ 1	$ 1
Dividends declared													$ (2,757,000,000)	$ (2,550,000,000)	$ (2,342,000,000)
Common stock dividends per share paid (in dollars per share)	$ 2.60	$ 2.40	$ 2.40	$ 2.40	$ 2.40	$ 2.20	$ 2.20	$ 2.20	$ 2.20	$ 2	$ 2	$ 2	$ 9.80	$ 9
Dividends declared, per share (in dollars per share)													$ 9.80	$ 9	$ 8.20
Accelerated Share Repurchase Agreement
Shareholders Equity [Line Items]
Accelerate Share Repurchase (ASR) authorized amount	$ 500,000,000				$ 350,000,000								$ 500,000,000	$ 350,000,000
Cash paid for repurchases of common stock													$ 500,000,000	$ 350,000,000
Shares received (in shares)	1,400,000				916,249								1,400,000	916,249
Average price paid per share (in dollars per share)														$ 381.99
Retained Earnings
Shareholders Equity [Line Items]
Stock repurchased (in shares)													3,000,000
Repurchases of common stock													$ 841,000,000	$ 713,000,000	$ 1,083,000,000
Dividends declared													(2,757,000,000)	(2,550,000,000)	(2,342,000,000)
Additional  Paid-In Capital
Shareholders Equity [Line Items]
Repurchases of common stock													$ 256,000,000	$ 483,000,000	$ 404,000,000

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Balance of Accumulated Other Comprehensive Loss, Net of Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 3,171	$ 1,449	$ (776)
Other comprehensive loss before reclassifications	(1,011)	(2,164)	(606)
Amounts reclassified from AOCL
Amounts reclassified from AOCL	444	931	1,232
Other comprehensive income (loss), net of tax	(567)	(1,233)	626
Reclassification of income tax effects from tax reform			0
Ending Balance	6,038	3,171	1,449
Postretirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(15,528)	(14,254)	(12,559)
Other comprehensive loss before reclassifications	(1,067)	(2,182)	(501)
Amounts reclassified from AOCL
Amounts reclassified from AOCL	440	908	1,202
Other comprehensive income (loss), net of tax	(627)	(1,274)	701
Reclassification of income tax effects from tax reform			(2,396)
Ending Balance	(16,155)	(15,528)	(14,254)
AOCI related to postretirement benefit plans, tax benefit	4,400	4,200	3,900
Other, net
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(26)	(67)	20
Other comprehensive loss before reclassifications	56	18	(105)
Amounts reclassified from AOCL
Amounts reclassified from AOCL	4	23	30
Other comprehensive income (loss), net of tax	60	41	(75)
Reclassification of income tax effects from tax reform			(12)
Ending Balance	34	(26)	(67)
AOCL
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(15,554)	(14,321)	(12,539)
Amounts reclassified from AOCL
Other comprehensive income (loss), net of tax	(567)	(1,233)	626
Reclassification of income tax effects from tax reform			(2,408)
Ending Balance	(16,121)	(15,554)	(14,321)
Recognition of net actuarial losses
Amounts reclassified from AOCL
Amounts reclassified from AOCL	689	1,148	1,455
Amortization of net prior service credits
Amounts reclassified from AOCL
Amounts reclassified from AOCL	(249)	(240)	(253)
Other
Amounts reclassified from AOCL
Amounts reclassified from AOCL	$ 4	$ 23	$ 30

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, net of tax	$ 175	$ 149	$ 137
Unrecognized compensation cost	$ 173
Period over which unrecognized compensation costs are expected to be recognized (years)	1 year 9 months 18 days
Realized tax benefits from stock-based compensation activities	$ 63	103	75
Weighted average remaining contractual life, vested	3 years
Number of years over which equity awards expire	10 years
Number of shares authorized (in shares)	11,000
Shares reserved for issuance (in shares)	8,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from exercise of stock options	$ 41	$ 66	$ 43
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	733	600	563	651
Number of stock, granted (in shares)	533	581	406
Average grant date fair value per unit (in dollars per share)	$ 383.99	$ 305.30	$ 353.99
Number of years over which equity awards vest	3 years
Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock, granted (in shares)	100
Number of years over which equity awards vest	3 years
Performance Stock Units (PSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of shares that can be earned from stock awards, as a percentage of the target award	0.00%
Performance Stock Units (PSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of shares that can be earned from stock awards, as a percentage of the target award	200.00%
Performance Stock Units (PSUs) | Half Of PSUs Granted In Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average grant date fair value per unit (in dollars per share)	$ 383.85
Performance Stock Units (PSUs) | Remaining Half Of PSUs Granted In Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average grant date fair value per unit (in dollars per share)	$ 484.50
Segment Reconciling Items
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 221	$ 189	$ 173

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock Based Compensation Activity Related to Nonvested RSUs (Detail) - Restricted Stock Units (RSUs) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of RSUs
Nonvested, Beginning balance (in shares)	600	563	651
Granted (in shares)	533	581	406
Vested (in shares)	(383)	(523)	(470)
Forfeited (in shares)	(17)	(21)	(24)
Nonvested, Ending balance (in shares)	733	600	563
Weighted Average Grant-Date Fair Value Per Share
Nonvested beginning balance (in dollars per share)	$ 305.06	$ 271.23	$ 220.21
Granted (in dollars per share)	383.99	305.30	353.99
Vested (in dollars per share)	329.63	269	271.50
Forfeited (in dollars per share)	349.02	302.78	282.07
Nonvested ending balance (in dollars per share)	$ 348.60	$ 305.06	$ 271.23

Legal Proceedings, Commitment_2

Legal Proceedings, Commitments and Contingencies (Detail) $ in Millions	Aug. 16, 2016USD ($)	Dec. 31, 2014	Dec. 31, 2020USD ($)subsidiary	Dec. 31, 2019USD ($)	May 31, 2017lawsuit	Apr. 24, 2009USD ($)
Loss Contingencies [Line Items]
Damages sought by plaintiff			$ 52
Liabilities recorded relative to environmental matters			789	$ 810
Environmental costs eligible for future recovery			$ 685	703
Time period environmental costs and recovery of environmental costs are projected over			20 years
Outstanding letters of credit, surety bonds, and third-party guarantees			$ 3,400	3,600
Third-party guarantees outstanding			$ 871	$ 996
Percentage of total guarantees that relate to guarantees of contractual performance of joint ventures			71.00%	76.00%
N.Y. Metropolitan Transportation Authority
Loss Contingencies [Line Items]
Damages sought by plaintiff			$ 190
Contract value						$ 323
Contract payments received to date			241
Claims for monetary damages against the plaintiff			$ 95
Loss contingency, period of bench trial		35 days
Leidos Holdings, Inc.
Loss Contingencies [Line Items]
Reserve transferred	$ 38
Indemnification percent, up to maximum reserve	100.00%
Maximum reserve	$ 64
Indemnification percent, in excess of maximum reserve	50.00%
Sikorsky Aircraft Corporation
Loss Contingencies [Line Items]
Number of pending lawsuits | lawsuit					2
Number of entities involved in litigation | subsidiary			2

Severance Charges (Detail)

Severance Charges (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Severance charges	$ 27	$ 27	$ 0	$ 96
Severance charges, net of tax	$ 21	$ 21
Severance charges (in dollars per share)	$ 0.08	$ 0.08

Fair Value Measurements - Measu

Fair Value Measurements - Measured on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Derivatives	$ 52	$ 18
Liabilities
Derivatives	22	23
Mutual funds
Assets
Fair value of investments measured on recurring basis	1,335	1,363
U.S. Government securities
Assets
Fair value of investments measured on recurring basis	92	99
Other securities
Assets
Fair value of investments measured on recurring basis	555	319
Level 1
Assets
Derivatives	0	0
Liabilities
Derivatives	0	0
Level 1 | Mutual funds
Assets
Fair value of investments measured on recurring basis	1,335	1,363
Level 1 | U.S. Government securities
Assets
Fair value of investments measured on recurring basis	0	0
Level 1 | Other securities
Assets
Fair value of investments measured on recurring basis	341	171
Level 2
Assets
Derivatives	52	18
Liabilities
Derivatives	22	23
Level 2 | Mutual funds
Assets
Fair value of investments measured on recurring basis	0	0
Level 2 | U.S. Government securities
Assets
Fair value of investments measured on recurring basis	92	99
Level 2 | Other securities
Assets
Fair value of investments measured on recurring basis	214	148
NAV | Other commingled funds
Liabilities
Assets measured at NAV	$ 20	$ 19

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Estimated fair values of debt instruments	$ 16,900	$ 15,900
Outstanding principal amount of debt instruments	13,299	13,812
Unamortized discounts and issuance costs	$ 1,130	$ 1,158

Summary of Quarterly Informat_3

Summary of Quarterly Information (Unaudited) (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 17,032	$ 16,495	$ 16,220	$ 15,651	$ 15,878	$ 15,171	$ 14,427	$ 14,336	$ 65,398	$ 59,812	$ 53,762
Operating profit	2,289	2,147	2,086	2,122	2,149	2,105	2,008	2,283	8,644	8,545	7,334
Net earnings from continuing operations	1,792	1,753	1,626	1,717					6,888	6,230	5,046
Net loss from discontinued operations	0	(55)	0	0
Net earnings	$ 1,792	$ 1,698	$ 1,626	$ 1,717	$ 1,498	$ 1,608	$ 1,420	$ 1,704	$ 6,833	$ 6,230	$ 5,046
Earnings per common share from continuing operations
Basic (in dollars per share)	$ 6.41	$ 6.28	$ 5.81	$ 6.10					$ 24.60	$ 22.09	$ 17.74
Diluted (in dollars per share)	6.38	6.25	5.79	6.08					24.50	21.95	17.59
Loss per common share from discontinued operations:
Basic (in dollars per share)	0	(0.20)	0	0					(0.20)	0	0
Diluted (in dollars per share)	0	(0.20)	0	0					(0.20)	0	0
Basic earnings per common share (in dollars per share)	6.41	6.08	5.81	6.10	$ 5.32	$ 5.70	$ 5.03	$ 6.03	24.40	22.09	17.74
Diluted earnings per common share (in dollars per share)	$ 6.38	$ 6.05	$ 5.79	$ 6.08	$ 5.29	$ 5.66	$ 5	$ 5.99	$ 24.30	$ 21.95	$ 17.59

Summary of Quarterly Informat_4

Summary of Quarterly Information (Unaudited) - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Mar. 04, 2019	Jul. 31, 2020	Dec. 31, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Sep. 29, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information [Line Items]
Equity method investment impairment									$ 128	$ 0	$ 0
Net loss from discontinued operations			$ 0	$ 55	$ 0	$ 0
Net loss from discontinued operations (in dollars per share)				$ 0.20
Severance charges			27						27	0	96
Severance charges, net of tax			$ 21						$ 21
Severance charges (in dollars per share)			$ 0.08						$ 0.08
Gain on property sale									$ 0	51	0
Foreign derived intangible income deduction related to prior year	$ 75						$ 62	$ 65	21	98
Foreign derived intangible income deduction related to prior year (in dollars per share)	$ 0.26						$ 0.22	$ 0.23
AMMROC
Quarterly Financial Information [Line Items]
Equity method investment impairment		$ 128			128						$ 110
Equity method investment impairment, after tax					$ 96				$ 96
Equity method investment impairment (in dollars per share)					$ 0.34
Land
Quarterly Financial Information [Line Items]
Gain on property sale								$ 51		$ 51
Gain on property sale, after tax								$ 38
Gain on property sale per share, after tax (in dollars per share)								$ 0.13