General Dynamics (GD) 10-K 10 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 26, 2020	Jun. 30, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	1-3671
Entity Registrant Name	GENERAL DYNAMICS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-1673581
Entity Address, Address Line One	11011 Sunset Hills Road
Entity Address, City or Town	Reston,
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	20190
City Area Code	(703)
Local Phone Number	876-3000
Title of 12(b) Security	Common stock
Trading Symbol	GD
Security Exchange Name	NYSE
Entity 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 Company	false
Entity Shell Company	false
Entity Public Float			$ 48,851,568,997
Entity Common Stock, Shares Outstanding		289,627,333
Entity Central Index Key	0000040533
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Statement of Earni

Consolidated Statement of Earnings - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue:
Revenue	$ 39,350	$ 36,193	$ 30,973
Operating costs and expenses:
Cost of sales	(32,291)	(29,478)	(24,731)
General and administrative (G&A)	(2,411)	(2,258)	(2,006)
Operating costs and expenses, Total	(34,702)	(31,736)	(26,737)
Operating earnings	4,648	4,457	4,236
Interest, net	(460)	(356)	(103)
Other, net	14	(16)	(56)
Earnings from continuing operations before income tax	4,202	4,085	4,077
Discontinued operations, net of tax provision of $13 in 2018	0	(13)	0
Provision for income tax, net	(718)	(727)	(1,165)
Earnings from continuing operations	3,484	3,358	2,912
Net earnings	$ 3,484	$ 3,345	$ 2,912
Basic:
Continuing operations	$ 12.09	$ 11.37	$ 9.73
Discontinued operations	0	(0.04)	0
Net earnings	12.09	11.33	9.73
Diluted:
Continuing operations	11.98	11.22	9.56
Discontinued operations	0	(0.04)	0
Net earnings	$ 11.98	$ 11.18	$ 9.56
Products
Revenue:
Revenue	$ 23,130	$ 20,149	$ 19,016
Operating costs and expenses:
Cost of sales	(18,569)	(15,894)	(14,773)
Services
Revenue:
Revenue	16,220	16,044	11,957
Operating costs and expenses:
Cost of sales	$ (13,722)	$ (13,584)	$ (9,958)

Consolidated Statement of Ear_2

Consolidated Statement of Earnings (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Discontinued operations, tax provision (benefit)	$ 0	$ 13	$ 0

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 3,484	$ 3,345	$ 2,912
Gains on cash flow hedges	97	36	341
Unrealized gains on marketable securities	0	0	9
Foreign currency translation adjustments	186	(300)	348
Change in retirement plans’ funded status	(886)	(61)	20
Other comprehensive (loss) income, pretax	(603)	(325)	718
Benefit (provision) for income tax, net	162	5	(151)
Other comprehensive (loss) income, net of tax	(441)	(320)	567
Comprehensive income	$ 3,043	$ 3,025	$ 3,479

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and equivalents	$ 902	$ 963
Accounts receivable	3,544	3,759
Unbilled receivables	7,857	6,576
Inventories	6,306	5,977
Other current assets	1,171	914
Total current assets	19,780	18,189
Noncurrent assets:
Property, plant and equipment, net	4,475	3,978
Intangible assets, net	2,315	2,585
Goodwill	19,677	19,594
Other assets	2,594	1,062
Total noncurrent assets	29,061	27,219
Total assets	48,841	45,408
Current liabilities:
Short-term debt and current portion of long-term debt	2,920	973
Accounts payable	3,162	3,179
Customer advances and deposits	7,148	7,270
Other current liabilities	3,571	3,317
Total current liabilities	16,801	14,739
Noncurrent liabilities:
Long-term debt	9,010	11,444
Other liabilities	9,453	7,493
Commitments and contingencies (see Note O)
Total noncurrent liabilities	18,463	18,937
Shareholders’ equity:
Common stock	482	482
Surplus	3,039	2,946
Retained earnings	31,633	29,326
Treasury stock	(17,358)	(17,244)
Accumulated other comprehensive loss	(4,219)	(3,778)
Total shareholders’ equity	13,577	11,732
Total liabilities and shareholders’ equity	$ 48,841	$ 45,408

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities - continuing operations:
Net earnings		$ 3,484	$ 3,345	$ 2,912
Adjustments to reconcile net earnings to net cash from operating activities:
Depreciation of property, plant and equipment		466	436	362
Amortization of intangible and finance lease right-of-use assets		363	327	79
Equity-based compensation expense		133	140	123
Deferred income tax (benefit) provision		92	(3)	401
Discontinued operations, net of tax		0	13	0
(Increase) decrease in assets, net of effects of business acquisitions:
Accounts receivable		176	417	(195)
Unbilled receivables		(1,303)	(800)	(987)
Inventories		(376)	(591)	(182)
Other current assets		8	310	207
Increase (decrease) in liabilities, net of effects of business acquisitions:
Accounts payable		6	(197)	657
Customer advances and deposits		(105)	36	264
Other, net		37	(285)	235
Net cash provided by operating activities	[1]	2,981	3,148	3,876
Cash flows from investing activities:
Capital expenditures		(987)	(690)	(428)
Business acquisitions, net of cash acquired		(19)	(10,099)	(399)
Proceeds from sales of assets		14	562	50
Other, net		(2)	(7)	(11)
Net cash used by investing activities		(994)	(10,234)	(788)
Cash flows from financing activities:
Dividends paid		(1,152)	(1,075)	(986)
(Repayments of) proceeds from commercial paper, net		(850)	850	0
Purchases of common stock		(231)	(1,769)	(1,558)
Proceeds from notes		0	6,461	985
Repayment of CSRA accounts receivable purchase agreement		0	(450)	0
Repayment of fixed-rate notes		0	0	(900)
Other, net		236	69	60
Net cash (used) provided by financing activities		(1,997)	5,086	(2,399)
Net cash used by discontinued operations		(51)	(20)	(40)
Net (decrease) increase in cash and equivalents		(61)	(2,020)	649
Cash and equivalents at beginning of year		963	2,983	2,334
Cash and equivalents at end of year		902	963	2,983
LIBOR
Cash flows from financing activities:
Proceeds from notes		$ 0	$ 1,000	$ 0
[1]	* Continuing operations only.

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Common Stock Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2016	$ 10,301	$ 482	$ 2,819	$ 24,543	$ (14,156)	$ (3,387)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	2,912			2,912
Cash dividends declared	(1,008)			(1,008)
Equity-based awards	199		53		146
Shares purchased	(1,533)				(1,533)
Other comprehensive income (loss)	567					567
Ending Balance at Dec. 31, 2017	11,435	482	2,872	26,444	(15,543)	(2,820)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	3,345			3,345
Cash dividends declared	(1,101)			(1,101)
Equity-based awards	179		74		105
Shares purchased	(1,806)				(1,806)
Other comprehensive income (loss)	(320)					(320)
Ending Balance at Dec. 31, 2018	11,732	482	2,946	29,326	(17,244)	(3,778)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	3,484			3,484
Cash dividends declared	(1,177)			(1,177)
Equity-based awards	163		93		70
Shares purchased	(184)				(184)
Other comprehensive income (loss)	(441)					(441)
Ending Balance at Dec. 31, 2019	$ 13,577	$ 482	$ 3,039	$ 31,633	$ (17,358)	$ (4,219)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization. General Dynamics is a global aerospace and defense company that offers a broad portfolio of products and services in business aviation; combat vehicles, weapons systems and munitions; information technology (IT) services; command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) solutions; and shipbuilding and ship repair. Basis of Consolidation and Classification. The Consolidated Financial Statements include the accounts of General Dynamics Corporation and our wholly owned and majority-owned subsidiaries. We eliminate all inter-company balances and transactions in the Consolidated Financial Statements. Some prior-year amounts have been reclassified among financial statement accounts or disclosures to conform to the current-year presentation. Consistent with industry practice, we classify assets and liabilities related to long-term contracts as current, even though some of these amounts may not be realized within one year. Further discussion of our significant accounting policies is contained in the other notes to these financial statements. Use of Estimates. The nature of our business requires that we make estimates and assumptions in accordance with U.S. generally accepted accounting principles (GAAP). These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reporting period . We base our estimates on historical experience, currently available information and various other assumptions that we believe are reasonable under the circumstances . Actual results could differ from these estimates. Discontinued Operations, Net of Tax. On April 3, 2018, we completed our acquisition of CSRA Inc. (CSRA). See Note B for further discussion of the acquisition. In the third quarter of 2018, we disposed of CSRA operations to address an organizational conflict of interest with respect to services provided to a government customer. In accordance with GAAP, the sale did not result in a gain for financial reporting purposes. However, the sale generated a taxable gain, resulting in tax expense of $13 . Research and Development Expenses. Company-sponsored research and development (R&D) expenses, including Aerospace product-development costs, were $466 in 2019 , $502 in 2018 and $521 in 2017 . R&D expenses have trended downward over the three-year period with the completion of the G500 and G600 aircraft test programs, offset partially by increased activities associated with the development of the new G700 aircraft model. R&D expenses are included in operating costs and expenses in the Consolidated Statement of Earnings in the period in which they are incurred. Customer-sponsored R&D expenses are charged directly to the related contracts. The Aerospace segment has cost-sharing arrangements with some of its suppliers that enhance the segment’s internal development capabilities and offset a portion of the financial cost associated with the segment’s product development efforts. These arrangements explicitly state that supplier contributions are for reimbursement of costs we incur in the development of new aircraft models and technologies, and we retain substantial rights in the products developed under these arrangements. We record amounts received from these cost-sharing arrangements as a reduction of R&D expenses. We have no obligation to refund any amounts received under the agreements regardless of the outcome of the development efforts. Under the typical terms of an agreement, payments received from suppliers for their share of the costs are based on milestones and are recognized as received. Our policy is to defer payments in excess of the costs we have incurred. Interest, Net. Net interest expense consisted of the following: Year Ended December 31 2019 2018 2017 Interest expense $ 472 $ 374 $ 117 Interest income (12 ) (18 ) (14 ) Interest expense, net $ 460 $ 356 $ 103 The increase in 2018 and 2019 is due primarily to the impact of financing the CSRA acquisition, including the issuance of $7.5 billion of fixed- and floating-rate notes in the second quarter of 2018. See Note K for additional information regarding our debt obligations, including interest rates. Cash and Equivalents and Investments in Debt and Equity Securities. We consider securities with a maturity of three months or less to be cash equivalents. Our cash balances are invested primarily in time deposits rated A-/A3 or higher. Our investments in other securities are included in other current and noncurrent assets on the Consolidated Balance Sheet (see Note E). We report our equity securities at fair value with subsequent changes in fair value recognized in net earnings. We report our available-for-sale debt securities at fair value with unrealized gains and losses recognized as a component of other comprehensive income in the Consolidated Statement of Comprehensive Income. We had no trading or held-to-maturity debt securities on December 31, 2019 or 2018 . Other Contract Costs. Other contract costs represent amounts that are not currently allocable to government contracts, such as a portion of our estimated workers’ compensation obligations, other insurance-related assessments, pension and other post-retirement benefits, and environmental expenses. These costs will become allocable to contracts generally after they are paid. We expect to recover these costs through ongoing business, including existing backlog and probable follow-on contracts. If the backlog in the future does not support the continued deferral of these costs, the profitability of our remaining contracts could be adversely affected. Other contract costs on December 31, 2019 and 2018 , were $144 and $135 , respectively, and are included in other current assets on the Consolidated Balance Sheet . Long-lived Assets and Goodwill. We review long-lived assets, including intangible assets subject to amortization, for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. We assess the recoverability of the carrying value of assets held for use based on a review of undiscounted projected cash flows. Impairment losses, where identified, are measured as the excess of the carrying value of the long-lived asset over its estimated fair value as determined by discounted projected cash flows. Goodwill represents the purchase price paid in excess of the fair value of net tangible and intangible assets acquired in a business combination. We review goodwill for impairment annually at each of our reporting units or when circumstances indicate that the likelihood of an impairment is greater than 50%. Our reporting units are consistent with our operating segments in Note S . We use both qualitative and quantitative approaches when testing goodwill for impairment. When determining the approach to be used, we consider the current facts and circumstances of each reporting unit as well as the excess of each reporting unit’s estimated fair value over its carrying value based on our most recent quantitative assessments. Our qualitative approach evaluates the business environment and various events impacting the reporting unit including, but not limited to, macroeconomic conditions, changes in the business environment and reporting unit-specific events. If, based on the qualitative assessment, we determine that it is more likely than not that the fair value of a reporting unit is greater than its carrying value, then a quantitative assessment is not necessary. However, if a quantitative assessment is determined to be necessary, we use a two-step process to first identify potential goodwill impairment for a reporting unit by comparing its fair value to its carrying value and then, if necessary, measure the amount of the impairment loss. Our estimate of fair value is based primarily on the discounted projected cash flows of the underlying operations . As of December 31, 2019, we completed qualitative assessments for our Aerospace, Combat Systems, Mission Systems and Marine Systems reporting units as the estimated fair values of each of these reporting units significantly exceeded the respective carrying values based on our most recent quantitative assessments, which were performed as of December 31, 2018. Our qualitative assessments did not present indicators of impairment for these reporting units as of December 31, 2019. As of December 31, 2019, we completed a quantitative assessment for our Information Technology reporting unit, and the results indicated that no impairment existed. The Information Technology reporting unit’s estimated fair value exceeded its carrying value by approximately 25%, reflecting the size of the CSRA acquisition relative to the Information Technology reporting unit and its recent acquisition date. Given that the net book value of this business was recorded at its fair value at the acquisition date in 2018, the reporting unit’s carrying value, by default, continues to closely approximate its fair value as of December 31, 2019. As the carrying value and fair value of the Information Technology reporting unit are closely aligned, a material change in the fair value or carrying value could put the reporting unit at risk of goodwill impairment. For example, if the synergies from the acquisition or funding in the U.S. government budget for our contracts fall significantly below our projections, the fair value of the reporting unit would be negatively impacted. Similarly, an increase in interest rates would lower our discounted cash flows and negatively impact the fair value of the reporting unit. We believe the projections and assumptions we used in estimating fair value are reasonable, but it is possible actual experience could differ, impacting our fair value estimate. For a summary of our goodwill by reporting unit, see Note B. Accounting Standards Updates. On January 1, 2019, we adopted the following accounting standards issued by the Financial Accounting Standards Board (FASB): • Accounting Standards Codification (ASC) Topic 842, Leases. ASC Topic 842 requires the recognition of lease rights and obligations as assets and liabilities on the balance sheet. Previously, lessees were not required to recognize on the balance sheet assets and liabilities arising from operating leases. As we elected the cumulative-effect adoption method, prior-period information has not been restated. The standard provided several optional practical expedients for use in transition. We elected to use what the FASB has deemed the “package of practical expedients,” which allowed us not to reassess our previous conclusions about lease identification, lease classification and the accounting treatment for initial direct costs. We did not elect the practical expedient pertaining to the use of hindsight. The most significant effects of the standard on our Consolidated Financial Statements are (1) the recognition of new right-of-use assets and lease liabilities on our Consolidated Balance Sheet for our operating leases, and (2) significant new disclosures about our leasing activities (see Note P). We adopted the standard on January 1, 2019, and recognized operating lease liabilities and right-of-use assets of $1.4 billion based on the present value of the remaining lease payments over the lease term. The adoption did not result in a cumulative-effect adjustment to retained earnings. The new standard did not have a material impact on our results of operations, financial condition or cash flows. • ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans. ASU 2018-14 adds, removes and clarifies disclosure requirements for defined-benefit pension and other post-retirement benefit plans. The standard is effective retrospectively on January 1, 2020, with early adoption permitted. We adopted the standard in 2019, and the adoption did not have a material effect on our disclosures. There are several other accounting standards that have been issued by the FASB but are not yet effective, including ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 significantly changes how entities account for credit losses for financial assets and certain other instruments, including trade receivables and contract assets, that are not measured at fair value through net income. The ASU requires a number of changes to the assessment of credit losses, including the utilization of an expected credit loss model, which requires consideration of a broader range of information to estimate expected credit losses over the entire lifetime of the asset, including losses where probability is considered remote. Additionally, the standard requires the estimation of lifetime expected losses for trade receivables and contract assets that are classified as current. We adopted the standard on January 1, 2020. The adoption of the ASU did not have a material effect on our results of operations, financial condition or cash flows.

Acquisitions and Divestitures,

Acquisitions and Divestitures, Goodwill, and Intangible Assets	12 Months Ended
	Dec. 31, 2019
Business Combinations, Goodwill and Intangible Assets Disclosure [Abstract]
Acquisitions and Divestitures, Goodwill, and Intangible Assets	ACQUISITIONS AND DIVESTITURES, GOODWILL, AND INTANGIBLE ASSETS CSRA Acquisition On April 3, 2018 , we acquired 100% of the outstanding shares of CSRA for $41.25 per share in cash plus the assumption of outstanding net debt. CSRA is a provider of IT solutions to the defense, intelligence and federal civilian markets and is included in our Information Technology segment. Fair Value of Net Assets Acquired. The following table summarizes the allocation of the $9.7 billion cash purchase price to the estimated fair values of the assets acquired and liabilities assumed on the acquisition date, with the excess recorded as goodwill: Cash and equivalents $ 45 Accounts receivable 155 Unbilled receivables 415 Other current assets 303 Property, plant and equipment, net 326 Intangible assets, net 2,066 Goodwill 7,935 Other noncurrent assets 369 Total assets $ 11,614 Accounts payable $ (135 ) Customer advances and deposits (151 ) Current lease obligation (51 ) Other current liabilities (434 ) Noncurrent lease obligation (207 ) Noncurrent deferred tax liability (355 ) Other noncurrent liabilities (532 ) Total liabilities $ (1,865 ) Net assets acquired $ 9,749 Pro Forma Information (Unaudited). The following pro forma information presents our consolidated revenue and earnings from continuing operations as if the acquisition of CSRA and the related financing transactions had occurred on January 1, 2017 : Year Ended December 31 2018 2017 Revenue $ 37,534 $ 35,828 Earnings from continuing operations 3,390 2,982 Diluted earnings per share from continuing operations $ 11.33 $ 9.79 The pro forma information was prepared by combining our reported historical results with the historical results of CSRA for the pre-acquisition periods. In addition, the reported historical amounts were adjusted for the following items, net of associated tax effects: • The impact of acquisition financing. • The removal of CSRA operations that we were required by a government customer to dispose of to address an organizational conflict of interest with respect to services provided to the customer. We completed the sale of these operations in 2018 . • The removal of CSRA’s historical pre-acquisition intangible asset amortization expense and debt-related interest expense. • The impact of intangible asset amortization expense assuming our estimate of fair value was applied on January 1, 2017 . • The payment of acquisition-related costs assuming they were incurred on January 1, 2017 . The pro forma information does not reflect the realization of expected cost savings or synergies from the acquisition, and does not reflect what our combined results of operations would have been had the acquisition occurred on January 1, 2017 . Other Acquisitions and Divestitures In 2019 , we acquired two businesses in our Aerospace segment and a business in our Mission Systems segment for an aggregate of approximately $20 . In 2018 , in addition to the acquisition of CSRA, we acquired five businesses for an aggregate of approximately $400 : • Hawker Pacific, a leading provider of aircraft services across Asia Pacific and the Middle East, and two fixed-base operator (FBO) businesses in our Aerospace segment; • a maintenance and service provider for the German Army and other international customers in our Combat Systems segment; and • a provider of specialized transmitters and receivers in our Mission Systems segment. In 2017 , we acquired four businesses for an aggregate of approximately $400 : • an FBO in our Aerospace segment; • a provider of mission-critical support services in our Information Technology segment; and • a manufacturer of electronics and communications products and a manufacturer of signal distribution products in our Mission Systems segment. The operating results of these acquisitions have been included with our reported results since the respective closing dates. The purchase prices of the acquisitions have been allocated to the estimated fair value of net tangible and intangible assets acquired, with any excess purchase price recorded as goodwill. In 2019, we completed the sale of a business in our Information Technology segment that was classified as held for sale on the Consolidated Balance Sheet on December 31, 2018. In 2018 , we completed the sale of three businesses in our Information Technology segment: a commercial health products business, CSRA operations that we were required by a government customer to dispose of to address an organizational conflict of interest with respect to services provided to the customer and a public-facing contact-center business. Goodwill The changes in the carrying amount of goodwill by reporting unit were as follows: Aerospace Combat Systems Information Systems and Technology Information Technology Mission Systems Marine Systems Total Goodwill December 31, 2017 (a) $ 2,638 $ 2,677 $ 6,302 $ — $ — $ 297 $ 11,914 Acquisitions/ divestitures (b) — — 16 — — — 16 Other (c) 40 (14 ) (1 ) — — — 25 April 1, 2018 (a) 2,678 2,663 6,317 — — 297 11,955 Change in reporting unit composition (d) — — (6,317 ) 2,076 4,241 — — Acquisitions/ divestitures (b) 183 30 — 7,601 7 — 7,821 Other (c) (48 ) (60 ) — (55 ) (19 ) — (182 ) December 31, 2018 (e) 2,813 2,633 — 9,622 4,229 297 19,594 Acquisitions/ divestitures (b) 3 15 — 77 6 — 101 Other (c) 15 33 — 1 (67 ) — (18 ) December 31, 2019 (e) $ 2,831 $ 2,681 $ — $ 9,700 $ 4,168 $ 297 $ 19,677 (a) Goodwill in the Information Systems and Technology reporting unit is net of $1.9 billion of accumulated impairment losses. (b) Includes adjustments during the purchase price allocation period. Activity in the first quarter of 2018 and the nine-month period ended December 31, 2018 , also includes an allocation of goodwill associated with the sale of the commercial health products business and an allocation of goodwill associated with the sale of a public-facing contact-center business, respectively, as discussed above. (c) Consists primarily of adjustments for foreign currency translation. Activity in the nine-month period ended December 31, 2018, also includes an allocation of goodwill in our Information Technology reporting unit associated with certain operations classified as held for sale on the Consolidated Balance Sheet on December 31, 2018. Activity in 2019 also includes an allocation of goodwill in our Mission Systems reporting unit associated with a non-core operation classified as held for sale on the Consolidated Balance Sheet on December 31, 2019 . (d) Concurrent with the acquisition of CSRA, we reorganized our Information Systems and Technology operating segment, in accordance with the nature of the segment’s products and services, into the Information Technology and Mission Systems segments. This reorganization similarly changed the composition of our reporting units. Accordingly, goodwill of the Information Systems and Technology reporting unit was reassigned to the Information Technology and Mission Systems reporting units using a relative fair value allocation approach as of the date of the reorganization. (e) Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively. Intangible Assets Intangible assets consisted of the following: Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount December 31 2019 2018 Contract and program intangible assets (b) $ 3,776 $ (1,779 ) $ 1,997 $ 3,771 $ (1,531 ) $ 2,240 Trade names and trademarks 474 (195 ) 279 469 (177 ) 292 Technology and software 164 (126 ) 38 165 (116 ) 49 Other intangible assets 159 (158 ) 1 159 (155 ) 4 Total intangible assets $ 4,573 $ (2,258 ) $ 2,315 $ 4,564 $ (1,979 ) $ 2,585 (a) Change in gross carrying amounts consists primarily of adjustments for acquired intangible assets and foreign currency translation. (b) Consists of acquired backlog and probable follow-on work and associated customer relationships. We did not recognize any impairments of our intangible assets in 2019 , 2018 or 2017 . The amortization lives (in years) of our intangible assets on December 31, 2019 , were as follows: Intangible Asset Range of Amortization Life Contract and program intangible assets 7-30 Trade names and trademarks 30 Technology and software 5-15 Other intangible assets 7 Amortization expense is included in operating costs and expenses in the Consolidated Statement of Earnings. Amortization expense was $277 in 2019 , $270 in 2018 and $79 in 2017 . We expect to record annual amortization expense over the next five years as follows: Year Ended December 31 Amortization Expense 2020 $ 264 2021 220 2022 192 2023 177 2024 164

Revenue

Revenue	12 Months Ended
	Dec. 31, 2019
Revenue Recognition [Abstract]
Revenue	REVENUE Performance Obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account for revenue. A contract’s transaction price is allocated to each distinct performance obligation within that contract and recognized as revenue when, or as, the performance obligation is satisfied. The majority of our contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and is, therefore, not distinct. Some of our contracts have multiple performance obligations, most commonly due to the contract covering multiple phases of the product lifecycle (development, production, maintenance and support). For contracts with multiple performance obligations, we allocate the contract’s transaction price to each performance obligation using our best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which we forecast our expected costs of satisfying a performance obligation and then add an appropriate margin for that distinct good or service. Contract modifications are routine in the performance of our contracts. Contracts are often modified to account for changes in contract specifications or requirements. In most instances, contract modifications are for goods or services that are not distinct and, therefore, are accounted for as part of the existing contract. Our performance obligations are satisfied over time as work progresses or at a point in time. Revenue from products and services transferred to customers over time accounted for 73% of our revenue in 2019 , 74% in 2018 and 71% in 2017 . Substantially all of our revenue in the defense segments is recognized over time, because control is transferred continuously to our customers. Typically, revenue is recognized over time using costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying our performance obligations. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Contract costs include labor, material, overhead and, when appropriate, G&A expenses. Revenue from goods and services transferred to customers at a point in time accounted for 27% of our revenue in 2019 , 26% in 2018 and 29% in 2017 . The majority of our revenue recognized at a point in time is for the manufacture of business-jet aircraft in our Aerospace segment. Revenue on these contracts is recognized when the customer obtains control of the asset, which is generally upon delivery and acceptance by the customer of the fully outfitted aircraft. On December 31, 2019 , we had $86.9 billion of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 35% of our remaining performance obligations as revenue in 2020, an additional 35% by 2022 and the balance thereafter. Contract Estimates. The majority of our revenue is derived from long-term contracts and programs that can span several years. Accounting for long-term contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For long-term contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events that often span several years. These assumptions include labor productivity and availability; the complexity of the work to be performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The nature of our contracts gives rise to several types of variable consideration, including claims and award and incentive fees. We include in our contract estimates additional revenue for submitted contract modifications or claims against the customer when we believe we have an enforceable right to the modification or claim, the amount can be estimated reliably and its realization is probable. In evaluating these criteria, we consider the contractual/legal basis for the claim, the cause of any additional costs incurred, the reasonableness of those costs and the objective evidence available to support the claim. We include award or incentive fees in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee. These estimates are based on historical award experience, anticipated performance and our best judgment at the time. Because of our certainty in estimating these amounts, they are included in the transaction price of our contracts and the associated remaining performance obligations. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up method. Under this method, the impact of the adjustment on profit recorded to date on a contract is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the period it is identified. The impact of adjustments in contract estimates on our operating earnings can be reflected in either operating costs and expenses or revenue. The aggregate impact of adjustments in contract estimates increased our revenue, operating earnings and diluted earnings per share as follows: Year Ended December 31 2019 2018 2017 Revenue $ 342 $ 377 $ 292 Operating earnings 271 345 323 Diluted earnings per share $ 0.74 $ 0.91 $ 0.69 No adjustment on any one contract was material to our Consolidated Financial Statements in 2019 , 2018 or 2017 . Revenue by Category. Our portfolio of products and services consists of approximately 11,000 active contracts. The following series of tables presents our revenue disaggregated by several categories. Revenue by major products and services was as follows: Year Ended December 31 2019 2018 2017 Aircraft manufacturing and completions $ 7,355 $ 6,226 $ 6,320 Aircraft services 2,154 2,096 1,743 Pre-owned aircraft 292 133 66 Total Aerospace 9,801 8,455 8,129 Military vehicles 4,620 4,027 3,731 Weapons systems, armament and munitions 1,906 1,798 1,633 Engineering and other services 481 416 585 Total Combat Systems 7,007 6,241 5,949 IT services 8,422 8,269 4,410 Total Information Technology 8,422 8,269 4,410 C4ISR solutions 4,937 4,726 4,481 Total Mission Systems 4,937 4,726 4,481 Nuclear-powered submarines 6,254 5,712 5,175 Surface ships 1,912 1,872 1,607 Repair and other services 1,017 918 1,222 Total Marine Systems 9,183 8,502 8,004 Total revenue $ 39,350 $ 36,193 $ 30,973 Revenue by contract type was as follows: Year Ended December 31, 2019 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Fixed-price $ 8,949 $ 6,049 $ 3,436 $ 2,908 $ 6,331 $ 27,673 Cost-reimbursement — 894 3,401 1,862 2,839 8,996 Time-and-materials 852 64 1,585 167 13 2,681 Total revenue $ 9,801 $ 7,007 $ 8,422 $ 4,937 $ 9,183 $ 39,350 Year Ended December 31, 2018 Fixed-price $ 7,600 $ 5,406 $ 3,396 $ 2,711 $ 5,493 $ 24,606 Cost-reimbursement — 800 3,422 1,861 3,004 9,087 Time-and-materials 855 35 1,451 154 5 2,500 Total revenue $ 8,455 $ 6,241 $ 8,269 $ 4,726 $ 8,502 $ 36,193 Year Ended December 31, 2017 Fixed-price $ 7,479 $ 5,090 $ 1,465 $ 2,478 $ 4,808 $ 21,320 Cost-reimbursement — 823 2,305 1,838 3,186 8,152 Time-and-materials 650 36 640 165 10 1,501 Total revenue $ 8,129 $ 5,949 $ 4,410 $ 4,481 $ 8,004 $ 30,973 Our segments operate under fixed-price, cost-reimbursement and time-and-materials contracts. Our production contracts are primarily fixed-price. Under these contracts, we agree to perform a specific scope of work for a fixed amount. Contracts for research, engineering, repair and maintenance, and other services are typically cost-reimbursement or time-and-materials. Under cost-reimbursement contracts, the customer reimburses contract costs incurred and pays a fixed, incentive or award-based fee. These fees are determined by our ability to achieve targets set in the contract, such as cost, quality, schedule and performance. Under time-and-materials contracts, the customer pays a fixed hourly rate for direct labor and generally reimburses us for the cost of materials. Each of these contract types presents advantages and disadvantages. Typically, we assume more risk with fixed-price contracts. However, these types of contracts offer additional profits when we complete the work for less than originally estimated. Cost-reimbursement contracts generally subject us to lower risk. Accordingly, the associated base fees are usually lower than fees earned on fixed-price contracts. Under time-and-materials contracts, our profit may vary if actual labor-hour rates vary significantly from the negotiated rates. Also, because these contracts can provide little or no fee for managing material costs, the content mix can impact profitability. Revenue by customer was as follows: Year Ended December 31, 2019 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total U.S. government: Department of Defense (DoD) $ 305 $ 3,695 $ 3,573 $ 3,454 $ 8,837 $ 19,864 Non-DoD 88 13 4,652 499 2 5,254 Foreign Military Sales (FMS) 105 340 15 41 188 689 Total U.S. government 498 4,048 8,240 3,994 9,027 25,807 U.S. commercial 5,477 229 176 151 142 6,175 Non-U.S. government 378 2,663 6 667 9 3,723 Non-U.S. commercial 3,448 67 — 125 5 3,645 Total revenue $ 9,801 $ 7,007 $ 8,422 $ 4,937 $ 9,183 $ 39,350 Year Ended December 31, 2018 U.S. government: DoD $ 236 $ 2,903 $ 3,213 $ 3,224 $ 8,098 $ 17,674 Non-DoD — 8 4,790 506 2 5,306 FMS 98 317 22 44 145 626 Total U.S. government 334 3,228 8,025 3,774 8,245 23,606 U.S. commercial 4,175 251 163 138 245 4,972 Non-U.S. government 551 2,698 81 662 10 4,002 Non-U.S. commercial 3,395 64 — 152 2 3,613 Total revenue $ 8,455 $ 6,241 $ 8,269 $ 4,726 $ 8,502 $ 36,193 Year Ended December 31, 2017 U.S. government: DoD $ 189 $ 2,702 $ 1,802 $ 3,027 $ 7,721 $ 15,441 Non-DoD — 8 2,340 556 — 2,904 FMS 42 374 22 46 192 676 Total U.S. government 231 3,084 4,164 3,629 7,913 19,021 U.S. commercial 3,885 220 214 108 71 4,498 Non-U.S. government 210 2,580 32 607 13 3,442 Non-U.S. commercial 3,803 65 — 137 7 4,012 Total revenue $ 8,129 $ 5,949 $ 4,410 $ 4,481 $ 8,004 $ 30,973 Contract Balances. The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets), and customer advances and deposits (contract liabilities) on the Consolidated Balance Sheet. In our defense segments, amounts are billed as work progresses in accordance with agreed-upon contractual terms, either at periodic intervals (e.g., biweekly or monthly) or upon achievement of contractual milestones. Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, we sometimes receive advances or deposits from our customers, particularly on our international contracts, before revenue is recognized, resulting in contract liabilities. These assets and liabilities are reported on the Consolidated Balance Sheet on a contract-by-contract basis at the end of each reporting period. In our Aerospace segment, we generally receive deposits from customers upon contract execution and upon achievement of contractual milestones. These deposits are liquidated when revenue is recognized. Changes in the contract asset and liability balances during the year ended December 31, 2019 , were not materially impacted by any other factors except for the delays in payment on an international wheeled armored vehicle contract in our Combat Systems segment, which contributed to growth in contract assets as further discussed in Note H. Revenue recognized in 2019 , 2018 and 2017 that was included in the contract liability balance at the beginning of each year was $4.5 billion , $4.3 billion and $4.3 billion , respectively. This revenue represented primarily the sale of business-jet aircraft.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE We compute basic earnings per share (EPS) using net earnings for the period and the weighted average number of common shares outstanding during the period. Basic weighted average shares outstanding have decreased in 2019 and 2018 due to share repurchases. See Note M for further discussion of our share repurchases. Diluted EPS incorporates the additional shares issuable upon the assumed exercise of stock options and the release of restricted stock and restricted stock units (RSUs). Basic and diluted weighted average shares outstanding were as follows (in thousands): Year Ended December 31 2019 2018 2017 Basic weighted average shares outstanding 288,286 295,262 299,172 Dilutive effect of stock options and restricted stock/RSUs* 2,550 3,898 5,465 Diluted weighted average shares outstanding 290,836 299,160 304,637 * Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the year and, therefore, the effect of including these options would be antidilutive. These options totaled 4,985 in 2019 , 3,143 in 2018 and 1,547 in 2017 .

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between marketplace participants. Various valuation approaches can be used to determine fair value, each requiring different valuation inputs. The following hierarchy classifies the inputs used to determine fair value into three levels: • Level 1 - quoted prices in active markets for identical assets or liabilities; • Level 2 - inputs, other than quoted prices, observable by a marketplace participant either directly or indirectly; and • Level 3 - unobservable inputs significant to the fair value measurement. We did not have any significant non-financial assets or liabilities measured at fair value on December 31, 2019 or 2018 . Our financial instruments include cash and equivalents, accounts receivable and payable, marketable securities held in trust and other investments, short- and long-term debt, and derivative financial instruments. The carrying values of cash and equivalents and accounts receivable and payable on the Consolidated Balance Sheet approximate their fair value. The following tables present the fair values of our other financial assets and liabilities on December 31, 2019 and 2018 , and the basis for determining their fair values: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets (Liabilities) December 31, 2019 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 24 $ 24 $ 11 $ 13 $ — Available-for-sale debt securities 129 129 — 129 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges 26 26 — 26 — Measured at amortized cost: Short- and long-term debt principal (12,005 ) (12,339 ) — (12,339 ) — December 31, 2018 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 29 $ 29 $ 23 $ 6 $ — Available-for-sale debt securities 121 121 — 121 — Equity securities 52 52 52 — — Other investments 4 4 — — 4 Cash flow hedges (69 ) (69 ) — (69 ) — Measured at amortized cost: Short- and long-term debt principal (12,518 ) (12,346 ) — (12,346 ) — Our Level 1 assets include investments in publicly traded equity securities valued using quoted prices from the market exchanges. The fair value of our Level 2 assets and liabilities is determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets. Our Level 3 assets include direct private equity investments that are measured using inputs unobservable to a marketplace participant.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Income Tax Provision. We calculate our provision for federal, state and international income taxes based on current tax law. U.S. federal tax reform was enacted on December 22, 2017, and has several key provisions impacting the accounting for and reporting of income taxes. The most significant provision reduced the U.S. corporate statutory tax rate from 35% to 21% beginning on January 1, 2018. We recorded the effect of the change in tax law in the fourth quarter of 2017. The provision for income taxes and effective tax rate in 2017 included a $119 unfavorable impact from the change in tax law. The impact was due primarily to the remeasurement of our U.S. federal deferred tax assets and liabilities at the tax rate expected to apply when the temporary differences are realized/settled (remeasured at a rate of 21% versus 35% for the majority of our deferred tax assets and liabilities). The U.S. Treasury Department and the Internal Revenue Service (IRS) are expected to issue further guidance related to tax reform that could impact our provision for income taxes in future periods. As a result, we believe it is reasonably possible there may be changes to provisional interpretations and assumptions we made in our application of tax reform provisions. We do not expect the impact of any changes to have a material impact on our results of operations, financial condition or cash flows. The following is a summary of our net provision for income taxes for continuing operations: Year Ended December 31 2019 2018 2017 Current: U.S. federal $ 471 $ 587 $ 656 State 36 48 31 International 119 95 77 Total current 626 730 764 Deferred: U.S. federal 49 (37 ) 215 State 1 8 7 International 42 26 60 Adjustment for enacted change in U.S. tax law — — 119 Total deferred 92 (3 ) 401 Provision for income taxes, net $ 718 $ 727 $ 1,165 Net income tax payments $ 572 $ 532 $ 617 The reported tax provision differs from the amounts paid because some income and expense items are recognized in different time periods for financial reporting than for income tax purposes. State and local income taxes allocable to U.S. government contracts are included in operating costs and expenses in the Consolidated Statement of Earnings and, therefore, are not included in the provision above. The reconciliation from the statutory federal income tax rate to our effective income tax rate follows: Year Ended December 31 2019 2018 2017 Statutory federal income tax rate 21.0 % 21.0 % 35.0 % State tax on commercial operations, net of federal benefits 0.7 1.1 0.6 Impact of international operations 0.2 0.6 (4.5 ) Domestic production deduction — — (1.5 ) Foreign derived intangible income (1.4 ) (1.2 ) — Equity-based compensation (1.1 ) (1.1 ) (2.6 ) Domestic tax credits (2.0 ) (1.1 ) (0.8 ) Contract close-outs — (0.5 ) — Adoption impact of enacted change in U.S. tax law — — 2.9 Other, net (0.3 ) (1.0 ) (0.5 ) Effective income tax rate 17.1 % 17.8 % 28.6 % Net Deferred Tax Liability. The tax effects of temporary differences between reported earnings and taxable income consisted of the following: December 31 2019 2018 Retirement benefits $ 1,097 $ 1,055 Lease assets 418 — Tax loss and credit carryforwards 323 393 Salaries and wages 167 160 Workers’ compensation 148 138 Other 367 351 Deferred assets 2,520 2,097 Valuation allowances (291 ) (336 ) Net deferred assets $ 2,229 $ 1,761 Intangible assets $ (1,070 ) $ (1,061 ) Lease liabilities (418 ) — Contract accounting methods (375 ) (530 ) Property, plant and equipment (291 ) (265 ) Capital Construction Fund qualified ships (164 ) (160 ) Other (359 ) (284 ) Deferred liabilities $ (2,677 ) $ (2,300 ) Net deferred tax liability $ (448 ) $ (539 ) Our deferred tax assets and liabilities are included in other noncurrent assets and liabilities on the Consolidated Balance Sheet. Our net deferred tax liability consisted of the following: December 31 2019 2018 Deferred tax asset $ 33 $ 38 Deferred tax liability (481 ) (577 ) Net deferred tax liability $ (448 ) $ (539 ) We believe it is more likely than not that we will generate sufficient taxable income in future periods to realize our deferred tax assets, subject to the valuation allowances recognized. Our deferred tax balance associated with our retirement benefits includes a deferred tax asset of $1.2 billion on December 31, 2019 and $1 billion on December 31, 2018 , related to the amounts recorded in accumulated other comprehensive loss (AOCL) to recognize the funded status of our retirement plans. See Notes M and R for additional details. One of our deferred tax liabilities results from our participation in the Capital Construction Fund (CCF), a program established by the U.S. government and administered by the Maritime Administration that supports the acquisition, construction, reconstruction or operation of U.S. flag merchant marine vessels. The program allows us to defer federal and state income taxes on earnings derived from eligible programs as long as the proceeds are deposited in the fund and withdrawals are used for qualified activities. We had U.S. government accounts receivable pledged (and thereby deposited) to the CCF of $340 and $483 on December 31, 2019 and 2018 , respectively. On December 31, 2019 , we had net operating loss carryforwards of $989 , substantially all of which are associated with jurisdictions that have an indefinite carryforward period. We had tax credit carryforwards of $68 that began to expire in 2020. Most of these carryforwards are subject to valuation allowances. Tax Uncertainties. We participate in the IRS Compliance Assurance Process (CAP), a real-time audit of our consolidated federal corporate income tax return. The IRS has examined our consolidated federal income tax returns through 2017 and is currently reviewing our 2018 tax year. For all periods open to examination by tax authorities, we periodically assess our liabilities and contingencies based on the latest available information. Where we believe there is more than a 50% chance that our tax position will not be sustained, we record our best estimate of the resulting tax liability, including interest, in the Consolidated Financial Statements. We include any interest or penalties incurred in connection with income taxes as part of income tax expense. Based on all known facts and circumstances and current tax law, we believe the total amount of any unrecognized tax benefits on December 31, 2019 , was not material to our results of operations, financial condition or cash flows. In addition, there are no tax positions for which it is reasonably possible that the unrecognized tax benefits will vary significantly over the next 12 months, producing, individually or in the aggregate, a material effect on our results of operations, financial condition or cash flows.

Accounts Receivable

Accounts Receivable	12 Months Ended
	Dec. 31, 2019
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Accounts Receivable	ACCOUNTS RECEIVABLE Accounts receivable represent amounts billed and currently due from customers. Payment is typically received from our customers either at periodic intervals (e.g., biweekly or monthly) or upon achievement of contractual milestones. Accounts receivable consisted of the following: December 31 2019 2018 Non-U.S. government $ 1,847 $ 2,035 U.S. government 1,076 1,189 Commercial 621 535 Total accounts receivable $ 3,544 $ 3,759 Receivables from non-U.S. government customers included amounts related to long-term production programs for the Spanish Ministry of Defence of $1.7 billion and $1.9 billion on December 31, 2019 and 2018 , respectively. A different ministry, the Spanish Ministry of Industry, has funded work on these programs in advance of costs incurred by the company. The cash advances are reported on the Consolidated Balance Sheet in current customer advances and deposits and will be repaid to the Ministry of Industry as we collect on the outstanding receivables from the Ministry of Defence. The net amounts for these programs on December 31, 2019 and 2018 , were advance payments of $295 and $338 , respectively. With respect to our other receivables, we expect to collect substantially all of the year-end 2019 balance during 2020 .

Unbilled Receivables

Unbilled Receivables	12 Months Ended
	Dec. 31, 2019
Contractors [Abstract]
Unbilled Receivables	UNBILLED RECEIVABLES Unbilled receivables represent revenue recognized on long-term contracts (contract costs and estimated profits) less associated advances and progress billings. These amounts will be billed in accordance with the agreed-upon contractual terms. Unbilled receivables consisted of the following: December 31 2019 2018 Unbilled revenue $ 33,481 $ 27,908 Advances and progress billings (25,624 ) (21,332 ) Net unbilled receivables $ 7,857 $ 6,576 The increase in net unbilled receivables in 2019 was due primarily to a large international wheeled armored vehicle contract in our Combat Systems segment. At December 31, 2019 , the net unbilled receivable related to this contract was $2.9 billion . Our contract is through the Canadian government to the international customer. We have experienced delays in payment under the contract. We continue to meet our obligations under the contract and are entitled to payment for work performed. In January 2020, we received a $500 progress payment in connection with the outstanding balance. We expect to collect the full amount currently outstanding. Other than the balance related to the large international vehicle contract, we expect to bill substantially all of the remaining year-end 2019 net unbilled receivables balance during 2020 . The amount not expected to be billed in 2020 results primarily from the agreed-upon contractual billing terms. G&A costs in unbilled revenue on December 31, 2019 and 2018 , were $441 and $381 , respectively. Contract costs also may include estimated contract recoveries for matters such as contract changes and claims for unanticipated contract costs. We record revenue associated with these matters only when the amount of recovery can be estimated reliably and realization is probable.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventories	INVENTORIES The majority of our inventories are for business-jet aircraft. Our inventories are stated at the lower of cost or net realizable value. Work in process represents largely labor, material and overhead costs associated with aircraft in the manufacturing process and is based primarily on the estimated average unit cost in a production lot. Raw materials are valued primarily on the first-in, first-out method. We record pre-owned aircraft acquired in connection with the sale of new aircraft at the lower of the trade-in value or the estimated net realizable value. Inventories consisted of the following: December 31 2019 2018 Work in process $ 4,419 $ 4,357 Raw materials 1,733 1,504 Finished goods 30 33 Pre-owned aircraft 124 83 Total inventories $ 6,306 $ 5,977 The increase in total inventories was due primarily to the ramp-up in production of the new G600 aircraft in our Aerospace segment. Customer deposits associated with these aircraft, which are reflected in customer advances and deposits and other noncurrent liabilities on the Consolidated Balance Sheet, have also increased. We received both type and production certification from the U.S. Federal Aviation Administration (FAA) for the G600 aircraft in June 2019 and delivered the first G600 aircraft in the third quarter of 2019. The increase in total inventories was also driven by production of initial units of the newly announced G700 aircraft.

Property, Plant And Equipment,

Property, Plant And Equipment, Net	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property, Plant And Equipment, Net	PROPERTY, PLANT AND EQUIPMENT, NET Property, plant and equipment (PP&E) is carried at historical cost, net of accumulated depreciation. PP&E by major asset class consisted of the following: December 31 2019 2018 Machinery and equipment $ 5,441 $ 5,152 Buildings and improvements 3,232 2,962 Land and improvements 400 386 Construction in process 688 472 Total PP&E 9,761 8,972 Accumulated depreciation (5,286 ) (4,994 ) PP&E, net $ 4,475 $ 3,978 We depreciate most of our assets using the straight-line method and the remainder using accelerated methods. Buildings and improvements are depreciated over periods of up to 50 years . Machinery and equipment are depreciated over periods of up to 30 years . Our government customers provide certain facilities and equipment for our use that are not included above.

Debt

Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt	DEBT Debt consisted of the following: December 31 2019 2018 Fixed-rate notes due: Interest rate: May 2020 2.875% $ 2,000 $ 2,000 May 2021 3.000% 2,000 2,000 July 2021 3.875% 500 500 November 2022 2.250% 1,000 1,000 May 2023 3.375% 750 750 August 2023 1.875% 500 500 November 2024 2.375% 500 500 May 2025 3.500% 750 750 August 2026 2.125% 500 500 November 2027 2.625% 500 500 May 2028 3.750% 1,000 1,000 November 2042 3.600% 500 500 Floating-rate notes due: May 2020 3-month LIBOR + 0.29% 500 500 May 2021 3-month LIBOR + 0.38% 500 500 Commercial paper 2.568% at December 31, 2018 — 850 Other Various 505 168 Total debt principal 12,005 12,518 Less unamortized debt issuance costs and discounts 75 101 Total debt 11,930 12,417 Less current portion 2,920 973 Long-term debt $ 9,010 $ 11,444 Interest payments associated with our debt were $434 in 2019 , $312 in 2018 and $93 in 2017 . Our fixed- and floating-rate notes are fully and unconditionally guaranteed by several of our 100 %-owned subsidiaries. See Note T for condensed consolidating financial statements. We have the option to redeem the fixed-rate notes prior to their maturity in whole or in part for the principal plus any accrued but unpaid interest and applicable make-whole amounts. The aggregate amounts of scheduled principal maturities of our debt are as follows: Year Ended December 31 Debt Principal 2020 $ 2,922 2021 3,009 2022 1,009 2023 1,255 2024 505 Thereafter 3,305 Total debt principal $ 12,005 On December 31, 2019 , we had no commercial paper outstanding, but we maintain the ability to access the commercial paper market in the future. We have $5 billion in committed bank credit facilities for general corporate purposes and working capital needs and to support our commercial paper issuances. These credit facilities include a $2 billion 364 -day facility expiring in March 2020 , a $1 billion multi-year facility expiring in November 2020 and a $2 billion multi-year facility expiring in March 2023 . We may renew or replace these credit facilities in whole or in part at or prior to their expiration dates. Our credit facilities are guaranteed by several of our 100 %-owned subsidiaries. We also have an effective shelf registration on file with the Securities and Exchange Commission that allows us to access the debt markets. Our financing arrangements contain a number of customary covenants and restrictions. We were in compliance with all covenants and restrictions on December 31, 2019 .

Other Liabilities

Other Liabilities	12 Months Ended
	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Other Liabilities	OTHER LIABILITIES A summary of significant other liabilities by balance sheet caption follows: December 31 2019 2018 Salaries and wages $ 941 $ 952 Workers’ compensation 306 244 Retirement benefits 296 272 Operating lease liabilities 252 — Fair value of cash flow hedges 32 141 Other (a) 1,744 1,708 Total other current liabilities $ 3,571 $ 3,317 Retirement benefits $ 5,172 $ 4,422 Operating lease liabilities 1,251 — Customer deposits on commercial contracts 709 726 Deferred income taxes 481 577 Other (b) 1,840 1,768 Total other liabilities $ 9,453 $ 7,493 (a) Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace segment, liabilities of discontinued operations, finance lease liabilities and insurance-related costs. (b) Consists primarily of warranty reserves, workers’ compensation liabilities, finance lease liabilities and liabilities of discontinued operations.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Shareholders' Equity	SHAREHOLDERS’ EQUITY Authorized Stock. Our authorized capital stock consists of 500 million shares of $1 per share par value common stock and 50 million shares of $1 per share par value preferred stock. The preferred stock is issuable in series, with the rights, preferences and limitations of each series to be determined by our board of directors. Shares Issued and Outstanding. On December 31, 2019 , we had 481,880,634 shares of common stock issued and 289,610,336 shares of common stock outstanding, including unvested restricted stock of 657,692 shares. On December 31, 2018 , we had 481,880,634 shares of common stock issued and 288,698,149 shares of common stock outstanding. No shares of our preferred stock were outstanding on either date. The only changes in our shares outstanding during 2019 and 2018 resulted from shares repurchased in the open market and share activity under our equity compensation plans. See Note Q for additional details. Share Repurchases. Our board of directors from time to time authorizes management’s repurchase of outstanding shares of our common stock on the open market. On December 5, 2018, the board of directors authorized management to repurchase up to 10 million additional shares of the company’s outstanding stock. In 2019 , we repurchased 1.1 million of our outstanding shares for $184 . On December 31, 2019 , 6.4 million shares remained authorized by our board of directors for repurchase, approximately 2% of our total shares outstanding. We repurchased 10.1 million shares for $1.8 billion in 2018 and 7.8 million shares for $1.5 billion in 2017 . Dividends per Share. Our board of directors declared dividends per share of $4.08 in 2019 , $3.72 in 2018 and $3.36 in 2017 . We paid cash dividends of $1.2 billion in 2019 , $1.1 billion in 2018 and $986 in 2017 . Accumulated Other Comprehensive Loss. The changes, pretax and net of tax, in each component of AOCL consisted of the following: Losses on Cash Flow Hedges Unrealized Gains on Marketable Securities Foreign Currency Translation Adjustments Changes in Retirement Plans’ Funded Status AOCL December 31, 2016 $ (345 ) $ 14 $ 69 $ (3,125 ) $ (3,387 ) Other comprehensive income, pretax 341 9 348 20 718 Provision for income tax, net (90 ) (4 ) (15 ) (42 ) (151 ) Other comprehensive income, net of tax 251 5 333 (22 ) 567 December 31, 2017 (94 ) 19 402 (3,147 ) (2,820 ) Cumulative-effect adjustments* (4 ) (19 ) — (615 ) (638 ) Other comprehensive loss, pretax 36 — (300 ) (61 ) (325 ) Benefit from income tax, net (9 ) — — 14 5 Other comprehensive loss, net of tax 27 — (300 ) (47 ) (320 ) December 31, 2018 (71 ) — 102 (3,809 ) (3,778 ) Other comprehensive loss, pretax 97 — 186 (886 ) (603 ) Benefit from income tax, net (24 ) — — 186 162 Other comprehensive loss, net of tax 73 — 186 (700 ) (441 ) December 31, 2019 $ 2 $ — $ 288 $ (4,509 ) $ (4,219 ) * Reflects the cumulative effects of ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which we adopted on January 1, 2018. Current-period amounts reclassified out of AOCL related primarily to changes in our retirement plans’ funded status and consisted of pretax recognized net actuarial losses of $318 in 2019 , $355 in 2018 and $358 in 2017 . This was offset partially by pretax amortization of prior service credit of $22 in 2019 , $50 in 2018 and $69 in 2017 . These AOCL components are included in our net periodic pension and other post-retirement benefit cost. See Note R for additional details.

Derivative Financial Instrument

Derivative Financial Instruments And Hedging Activities	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments And Hedging Activities	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES We are exposed to market risk, primarily from foreign currency exchange rates, interest rates, commodity prices and investments. We may use derivative financial instruments to hedge some of these risks as described below. We do not use derivative financial instruments for trading or speculative purposes. Foreign Currency Risk. Our foreign currency exchange rate risk relates to receipts from customers, payments to suppliers and inter-company transactions denominated in foreign currencies. To the extent possible, we include terms in our contracts that are designed to protect us from this risk. Otherwise, we enter into derivative financial instruments, principally foreign currency forward purchase and sale contracts, designed to offset and minimize our risk. The dollar-weighted one -year average maturity of these instruments generally matches the duration of the activities that are at risk. Interest Rate Risk. Our financial instruments subject to interest rate risk include fixed- and floating-rate long-term debt obligations. We entered into derivative financial instruments, specifically interest rate swap contracts, to eliminate our floating-rate interest risk. The interest rate risk associated with our financial instruments is not material. Commodity Price Risk. We are subject to rising labor and commodity price risk, primarily on long-term, fixed-price contracts. To the extent possible, we include terms in our contracts that are designed to protect us from these risks. Some of the protective terms included in our contracts are considered derivative financial instruments but are not accounted for separately, because they are clearly and closely related to the host contract. We have not entered into any material commodity hedging contracts but may do so as circumstances warrant. We do not believe that changes in labor or commodity prices will have a material impact on our results of operations or cash flows. Investment Risk. Our investment policy allows for purchases of fixed-income securities with an investment-grade rating and a maximum maturity of up to five years . On December 31, 2019 , we held $902 in cash and equivalents, but held no marketable securities other than those held in trust to meet some of our obligations under workers’ compensation and non-qualified supplemental executive retirement plans . On December 31, 2019 , these marketable securities totaled $207 and were reflected at fair value on the Consolidated Balance Sheet in other current and noncurrent assets . See Note E for additional details. Hedging Activities. We had notional forward exchange and interest rate swap contracts outstanding of $5 billion and $5.8 billion on December 31, 2019 and 2018 , respectively. These derivative financial instruments are cash flow hedges, and are reflected at fair value on the Consolidated Balance Sheet in other current assets and liabilities. See Note E for additional details. Changes in fair value (gains and losses) related to derivative financial instruments that qualify as cash flow hedges are deferred in AOCL until the underlying transaction is reflected in earnings. Alternatively, gains and losses on derivative financial instruments that do not qualify for hedge accounting are recorded each period in earnings. All gains and losses from derivative financial instruments recognized in the Consolidated Statement of Earnings are presented in the same line item as the underlying transaction, either operating costs and expenses or interest expense. Net gains and losses recognized in earnings on derivative financial instruments that do not qualify for hedge accounting were not material to our results of operations in any of the past three years. Net gains and losses reclassified to earnings from AOCL related to qualified hedges were also not material to our results of operations in any of the past three years, and we do not expect the amount of these gains and losses that will be reclassified to earnings during the next 12 months to be material. We had no material derivative financial instruments designated as fair value or net investment hedges on December 31, 2019 or 2018 . Foreign Currency Financial Statement Translation. We translate foreign currency balance sheets from our international businesses’ functional currency (generally the respective local currency) to U.S. dollars at the end-of-period exchange rates, and statements of earnings at the average exchange rates for each period. The resulting foreign currency translation adjustments are a component of AOCL. We do not hedge the fluctuation in reported revenue and earnings resulting from the translation of these international operations’ results into U.S. dollars. The impact of translating our non-U.S. operations’ revenue into U.S. dollars was not material to our results of operations in any of the past three years. In addition, the effect of changes in foreign exchange rates on non-U.S. cash balances was not material in any of the past three years.

Commitments And Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Litigation In 2015, Electric Boat Corporation, a subsidiary of General Dynamics Corporation, received a Civil Investigative Demand from the U.S. Department of Justice regarding an investigation of potential False Claims Act violations relating to alleged failures of Electric Boat’s quality system with respect to allegedly non-conforming parts purchased from a supplier. In 2016, Electric Boat was made aware that it is a defendant in a lawsuit related to this matter which had been filed under seal in U.S. district court. Also in 2016, the Suspending and Debarring Official for the U.S. Department of the Navy issued a Show Cause Letter to Electric Boat requesting that Electric Boat respond to the official’s concerns regarding Electric Boat’s oversight and management with respect to its quality assurance systems for subcontractors and suppliers. Electric Boat responded to the Show Cause Letter and engaged in discussions with the U.S. government. In the third quarter of 2019, the Department of Justice declined to intervene in the qui tam action, noting that its investigation continues, and the court unsealed the relator’s complaint. In the first quarter of 2020, the relator filed an amended complaint. Given the current status of these matters, we are unable to express a view regarding the ultimate outcome or, if the outcome is adverse, to estimate an amount or range of reasonably possible loss. Depending on the outcome of these matters, there could be a material impact on our results of operations, financial condition and cash flows. Additionally, various other claims and legal proceedings incidental to the normal course of business are pending or threatened against us. These other matters relate to such issues as government investigations and claims, the protection of the environment , asbestos-related claims and employee-related matters. The nature of litigation is such that we cannot predict the outcome of these other matters. However, based on information currently available, we believe any potential liabilities in these other proceedings, individually or in the aggregate, will not have a material impact on our results of operations, financial condition or cash flows. Environmental We are subject to and affected by a variety of federal, state, local and foreign environmental laws and regulations. We are directly or indirectly involved in environmental investigations or remediation at some of our current and former facilities and third-party sites that we do not own but where we have been designated a Potentially Responsible Party (PRP) by the U.S. Environmental Protection Agency or a state environmental agency. Based on historical experience, we expect that a significant percentage of the total remediation and compliance costs associated with these facilities will continue to be allowable contract costs and, therefore, recoverable under U.S. government contracts. As required, we provide financial assurance for certain sites undergoing or subject to investigation or remediation. We accrue environmental costs when it is probable that a liability has been incurred and the amount can be reasonably estimated. Where applicable, we seek insurance recovery for costs related to environmental liabilities. We do not record insurance recoveries before collection is considered probable. Based on all known facts and analyses, we do not believe that our liability at any individual site, or in the aggregate, arising from such environmental conditions will be material to our results of operations, financial condition or cash flows. We also do not believe that the range of reasonably possible additional loss beyond what has been recorded would be material to our results of operations, financial condition or cash flows. Other Government Contracts. As a government contractor, we are subject to U.S. government audits and investigations relating to our operations, including claims for fines, penalties, and compensatory and treble damages. We believe the outcome of such ongoing government audits and investigations will not have a material impact on our results of operations, financial condition or cash flows. In the performance of our contracts, we routinely request contract modifications that require additional funding from the customer. Most often, these requests are due to customer-directed changes in the scope of work. While we are entitled to recovery of these costs under our contracts, the administrative process with our customer may be protracted. Based on the circumstances, we periodically file requests for equitable adjustment (REAs) that are sometimes converted into claims. In some cases, these requests are disputed by our customer. We believe our outstanding modifications, REAs and other claims will be resolved without material impact to our results of operations, financial condition or cash flows. Letters of Credit and Guarantees. In the ordinary course of business, we have entered into letters of credit, bank guarantees, surety bonds and other similar arrangements with financial institutions and insurance carriers totaling approximately $1.5 billion on December 31, 2019 . In addition, from time to time and in the ordinary course of business, we contractually guarantee the payment or performance of our subsidiaries arising under certain contracts. Aircraft Trade-ins. In connection with orders for new aircraft in contract backlog, our Aerospace segment has outstanding options with some customers to trade in aircraft as partial consideration in their new-aircraft transaction. These trade-in commitments are generally structured to establish the fair market value of the trade-in aircraft at a date generally 45 or fewer days preceding delivery of the new aircraft to the customer. At that time, the customer is required to either exercise the option or allow its expiration. Other trade-in commitments are structured to guarantee a pre-determined trade-in value. These commitments present more risk in the event of an adverse change in market conditions. In either case, any excess of the pre-established trade-in price above the fair market value at the time the new aircraft is delivered is treated as a reduction of revenue in the new-aircraft sales transaction. As of December 31, 2019, the estimated change in fair market values from the date of the commitments was not material. Labor Agreements. On December 31, 2019 , approximately one-fifth of the employees of our subsidiaries were working under collectively bargained terms and conditions, including 60 collective agreements that we have negotiated directly with unions and works councils. A number of these agreements expire within any given year. Historically, we have been successful at renegotiating these labor agreements without any material disruption of operating activities. In 2020 , we expect to negotiate the terms of 28 agreements covering approximately 10,000 employees. We do not expect the renegotiations will, either individually or in the aggregate, have a material impact on our results of operations, financial condition or cash flows. Product Warranties. We provide warranties to our customers associated with certain product sales. We record estimated warranty costs in the period in which the related products are delivered. The warranty liability recorded at each balance sheet date is based generally on the number of months of warranty coverage remaining for the products delivered and the average historical monthly warranty payments. Warranty obligations incurred in connection with long-term production contracts are accounted for within the contract estimates at completion. Our other warranty obligations, primarily for business-jet aircraft, are included in other current and noncurrent liabilities on the Consolidated Balance Sheet. The changes in the carrying amount of warranty liabilities for each of the past three years were as follows: Year Ended December 31 2019 2018 2017 Beginning balance $ 480 $ 467 $ 474 Warranty expense 258 129 146 Payments (105 ) (102 ) (123 ) Adjustments (14 ) (14 ) (30 ) Ending balance $ 619 $ 480 $ 467

Equity Compensation Plans

Equity Compensation Plans	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Equity Compensation Plans	EQUITY COMPENSATION PLANS Equity Compensation Overview. We have equity compensation plans for employees, as well as for non-employee members of our board of directors. The equity compensation plans seek to provide an effective means of attracting and retaining directors, officers and key employees, and to provide them with incentives to enhance our growth and profitability. Under the equity compensation plans, awards may be granted to officers, employees or non-employee directors in common stock, options to purchase common stock, restricted shares of common stock, participation units or any combination of these. Annually, we grant awards of stock options, restricted stock and RSUs to participants in our equity compensation plans in early March. Additionally, we may make limited ad hoc grants on a quarterly basis for new hires or promotions. We issue common stock under our equity compensation plans from treasury stock. On December 31, 2019 , in addition to the shares reserved for issuance upon the exercise of outstanding stock options, approximately 26 million shares have been authorized for awards that may be granted in the future. Equity-based Compensation Expense. Equity-based compensation expense is included in G&A expenses. The following table details the components of equity-based compensation expense recognized in net earnings in each of the past three years: Year Ended December 31 2019 2018 2017 Stock options $ 43 $ 45 $ 34 Restricted stock/RSUs 62 65 46 Total equity-based compensation expense, net of tax $ 105 $ 110 $ 80 Stock Options. Stock options granted under our equity compensation plans are issued with an exercise price at the fair value of our common stock determined by the average of the high and low stock prices as listed on the New York Stock Exchange (NYSE) on the date of grant. The majority of our outstanding stock options vest over three years , with 50% of the options vesting after two years and the remaining 50% vesting the following year, and expire 10 years after the grant date. We recognize compensation expense related to stock options on a straight-line basis over the vesting period of the awards, net of estimated forfeitures. Estimated forfeitures are based on our historical forfeiture experience. We estimate the fair value of stock options on the date of grant using the Black-Scholes option pricing model with the following assumptions for each of the past three years: Year Ended December 31 2019 2018 2017 Expected volatility 19.7-20.0% 17.6-18.2% 17.3-19.4% Weighted average expected volatility 19.7 % 17.6 % 19.4 % Expected term (in months) 64 68 68 Risk-free interest rate 1.7-2.6% 2.6-2.9% 2.0-2.2% Expected dividend yield 2.0 % 1.8 % 1.8 % We determine the above assumptions based on the following: • Expected volatility is based on the historical volatility of our common stock over a period equal to the expected term of the option. • Expected term is based on assumptions used by a set of comparable peer companies. • Risk-free interest rate is the yield on a U.S. Treasury zero-coupon issue with a remaining term equal to the expected term of the option at the grant date. • Expected dividend yield is based on our historical dividend yield. The resulting weighted average fair value per stock option granted (in dollars) was $29.06 in 2019 , $37.42 in 2018 and $33.09 in 2017 . Stock option expense reduced pretax operating earnings (and on a diluted per-share basis) by $55 ( $0.15 ) in 2019 , $57 ( $0.15 ) in 2018 and $53 ( $0.11 ) in 2017 . Compensation expense for stock options is reported as a Corporate expense for segment reporting purposes (see Note S). On December 31, 2019 , we had $70 of unrecognized compensation cost related to stock options, which is expected to be recognized over a weighted average period of 1.8 years. A summary of stock option activity during 2019 follows: In Shares and Dollars Shares Under Option Weighted Average Exercise Price Per Share Outstanding on December 31, 2018 10,765,195 $ 143.43 Granted 2,115,740 167.92 Exercised (2,757,815 ) 91.34 Forfeited/canceled (355,371 ) 195.59 Outstanding on December 31, 2019 9,767,749 $ 161.54 Vested and expected to vest on December 31, 2019 9,538,150 $ 161.10 Exercisable on December 31, 2019 5,484,562 $ 137.92 Summary information with respect to our stock options’ intrinsic value and remaining contractual term on December 31, 2019 , follows: Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding 6.4 $ 242 Vested and expected to vest 6.4 241 Exercisable 4.8 225 In the table above, intrinsic value is calculated as the excess, if any, of the market price of our stock on the last trading day of the year over the exercise price of the options. For stock options exercised, intrinsic value is calculated as the difference between the market price on the date of exercise and the exercise price. The total intrinsic value of stock options exercised was $244 in 2019 , $147 in 2018 and $215 in 2017 . Restricted Stock/RSUs. The fair value of restricted stock and RSUs equals the average of the high and low market prices of our common stock as listed on the NYSE on the date of grant. Grants of restricted stock are awards of shares of common stock. Participation units represent obligations that have a value derived from or related to the value of our common stock. These include stock appreciation rights, phantom stock units and RSUs, and are payable in cash or common stock. Restricted stock and RSUs generally vest over a three -year restriction period after the grant date, during which recipients may not sell, transfer, pledge, assign or otherwise convey their restricted shares to another party. During this period, restricted stock recipients receive cash dividends on their restricted shares and are entitled to vote those shares, while RSU recipients receive dividend-equivalent units instead of cash dividends and are not entitled to vote their RSUs or dividend-equivalent units. We grant RSUs with one or more performance measures determined by the compensation committee of the board of directors as described in our proxy statement. Depending on the company’s performance, the number of RSUs earned may be less than, equal to or greater than the original number of RSUs awarded subject to a payout range. We generally recognize compensation expense related to restricted stock and RSUs on a straight-line basis over the vesting period of the awards. Compensation expense related to restricted stock and RSUs reduced pretax operating earnings (and on a diluted per-share basis) by $79 ( $0.21 ) in 2019 , $83 ( $0.22 ) in 2018 and $70 ( $0.15 ) in 2017 . Compensation expense for restricted stock and RSUs is reported as an operating expense for segment reporting purposes (see Note S). On December 31, 2019 , we had $53 of unrecognized compensation cost related to restricted stock and RSUs, which is expected to be recognized over a weighted average period of 1.6 years . A summary of restricted stock and RSU activity during 2019 follows: In Shares and Dollars Shares/ Share-Equivalent Units Weighted Average Grant-Date Fair Value Per Share Nonvested at December 31, 2018 1,262,276 $ 171.62 Granted 556,922 161.43 Vested (541,997 ) 138.73 Forfeited (52,837 ) 183.81 Nonvested at December 31, 2019 1,224,364 $ 181.11 The total fair value of vesting shares was $88 in 2019 , $242 in 2018 and $200 in 2017 .

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases, Operating	LEASES We determine at its inception whether an arrangement that provides us control over the use of an asset is a lease. We recognize at lease commencement a right-of-use (ROU) asset and lease liability based on the present value of the future lease payments over the lease term. We have elected not to recognize an ROU asset and lease liability for leases with terms of 12 months or less. Some of our leases include options to extend the term of the lease for up to 30 years or to terminate the lease within 1 year. When it is reasonably certain that we will exercise the option, we include the impact of the option in the lease term for purposes of determining total future lease payments. As most of our lease agreements do not explicitly state the discount rate implicit in the lease, we use our incremental borrowing rate on the commencement date to calculate the present value of future payments. Our leases commonly include payments that are based on the Consumer Price Index (CPI) or other similar indices. These variable lease payments are included in the calculation of the ROU asset and lease liability. Other variable lease payments, such as usage-based amounts, are excluded from the ROU asset and lease liability, and are expensed as incurred. In addition to the present value of the future lease payments, the calculation of the ROU asset also includes any deferred rent, lease pre-payments and initial direct costs of obtaining the lease, such as commissions. In addition to the base rent, real estate leases typically contain provisions for common-area maintenance and other similar services, which are considered non-lease components for accounting purposes. For our real estate leases, we apply a practical expedient to include these non-lease components in calculating the ROU asset and lease liability. For all other types of leases, non-lease components are excluded from our ROU assets and lease liabilities and expensed as incurred. Our leases are for office space, manufacturing facilities, and machinery and equipment. Real estate represents over 75% of our lease obligations. The components of lease costs were as follows: Year Ended December 31 2019 Finance lease cost: Amortization of right-of-use assets $ 86 Interest on lease liabilities 24 Operating lease cost 332 Short-term lease cost 75 Variable lease cost 14 Sublease income (13 ) Total lease costs, net $ 518 As we have not restated prior-year information for our adoption of ASC Topic 842, total operating lease expense under ASC Topic 840 was $380 in 2018 and $309 in 2017. Additional information related to leases was as follows: Year Ended December 31 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 325 Operating cash flows from finance leases 24 Financing cash flows from finance leases 57 Right-of-use assets obtained in exchange for lease liabilities: Operating leases 365 Finance leases 50 Additional quantitative lease information was as follows: December 31 2019 Weighted-average remaining lease term: Operating leases 10.7 years Finance leases 6.1 years Weighted-average discount rate: Operating leases 3 % Finance leases 8 % The following is a reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets, presented on the Consolidated Balance Sheet on December 31, 2019 : Year Ended December 31 Operating Leases Finance Leases 2020 $ 302 $ 91 2021 261 83 2022 212 83 2023 163 36 2024 136 19 Thereafter 790 131 Total future lease payments 1,864 443 Less imputed interest 361 89 Present value of future lease payments 1,503 354 Less current portion of lease liabilities 252 67 Long-term lease liabilities $ 1,251 $ 287 ROU assets $ 1,432 $ 391 Lease liabilities are included on the Consolidated Balance Sheet in current and noncurrent other liabilities, while ROU assets are included in noncurrent other assets. As we have not restated prior-year information for our adoption of ASC Topic 842, the gross amount of assets recorded under capital leases under ASC Topic 840 was $485 with accumulated amortization of $61 as of December 31, 2018. On December 31, 2019 , we had additional future payments on leases that had not yet commenced of $116 . These leases will commence in 2020 , and have lease terms of 1 to 20 years. As we have not restated prior-year information for our adoption of ASC Topic 842, the following presents our future minimum lease payments for operating leases and capital leases under ASC Topic 840 on December 31, 2018 : Year Ended December 31 Operating Leases Capital Leases 2019 $ 297 $ 92 2020 234 84 2021 196 78 2022 154 79 2023 110 30 Thereafter 698 70 Total future minimum lease payments $ 1,689 433 Less amount representing interest * 95 Less amount representing executory costs * 19 Present value of net minimum lease payments * 319 Less current maturities of capital lease liabilities * 64 Noncurrent capital lease liabilities * $ 255 * Not applicable for operating leases.
Leases, Financing	LEASES We determine at its inception whether an arrangement that provides us control over the use of an asset is a lease. We recognize at lease commencement a right-of-use (ROU) asset and lease liability based on the present value of the future lease payments over the lease term. We have elected not to recognize an ROU asset and lease liability for leases with terms of 12 months or less. Some of our leases include options to extend the term of the lease for up to 30 years or to terminate the lease within 1 year. When it is reasonably certain that we will exercise the option, we include the impact of the option in the lease term for purposes of determining total future lease payments. As most of our lease agreements do not explicitly state the discount rate implicit in the lease, we use our incremental borrowing rate on the commencement date to calculate the present value of future payments. Our leases commonly include payments that are based on the Consumer Price Index (CPI) or other similar indices. These variable lease payments are included in the calculation of the ROU asset and lease liability. Other variable lease payments, such as usage-based amounts, are excluded from the ROU asset and lease liability, and are expensed as incurred. In addition to the present value of the future lease payments, the calculation of the ROU asset also includes any deferred rent, lease pre-payments and initial direct costs of obtaining the lease, such as commissions. In addition to the base rent, real estate leases typically contain provisions for common-area maintenance and other similar services, which are considered non-lease components for accounting purposes. For our real estate leases, we apply a practical expedient to include these non-lease components in calculating the ROU asset and lease liability. For all other types of leases, non-lease components are excluded from our ROU assets and lease liabilities and expensed as incurred. Our leases are for office space, manufacturing facilities, and machinery and equipment. Real estate represents over 75% of our lease obligations. The components of lease costs were as follows: Year Ended December 31 2019 Finance lease cost: Amortization of right-of-use assets $ 86 Interest on lease liabilities 24 Operating lease cost 332 Short-term lease cost 75 Variable lease cost 14 Sublease income (13 ) Total lease costs, net $ 518 As we have not restated prior-year information for our adoption of ASC Topic 842, total operating lease expense under ASC Topic 840 was $380 in 2018 and $309 in 2017. Additional information related to leases was as follows: Year Ended December 31 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 325 Operating cash flows from finance leases 24 Financing cash flows from finance leases 57 Right-of-use assets obtained in exchange for lease liabilities: Operating leases 365 Finance leases 50 Additional quantitative lease information was as follows: December 31 2019 Weighted-average remaining lease term: Operating leases 10.7 years Finance leases 6.1 years Weighted-average discount rate: Operating leases 3 % Finance leases 8 % The following is a reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets, presented on the Consolidated Balance Sheet on December 31, 2019 : Year Ended December 31 Operating Leases Finance Leases 2020 $ 302 $ 91 2021 261 83 2022 212 83 2023 163 36 2024 136 19 Thereafter 790 131 Total future lease payments 1,864 443 Less imputed interest 361 89 Present value of future lease payments 1,503 354 Less current portion of lease liabilities 252 67 Long-term lease liabilities $ 1,251 $ 287 ROU assets $ 1,432 $ 391 Lease liabilities are included on the Consolidated Balance Sheet in current and noncurrent other liabilities, while ROU assets are included in noncurrent other assets. As we have not restated prior-year information for our adoption of ASC Topic 842, the gross amount of assets recorded under capital leases under ASC Topic 840 was $485 with accumulated amortization of $61 as of December 31, 2018. On December 31, 2019 , we had additional future payments on leases that had not yet commenced of $116 . These leases will commence in 2020 , and have lease terms of 1 to 20 years. As we have not restated prior-year information for our adoption of ASC Topic 842, the following presents our future minimum lease payments for operating leases and capital leases under ASC Topic 840 on December 31, 2018 : Year Ended December 31 Operating Leases Capital Leases 2019 $ 297 $ 92 2020 234 84 2021 196 78 2022 154 79 2023 110 30 Thereafter 698 70 Total future minimum lease payments $ 1,689 433 Less amount representing interest * 95 Less amount representing executory costs * 19 Present value of net minimum lease payments * 319 Less current maturities of capital lease liabilities * 64 Noncurrent capital lease liabilities * $ 255 * Not applicable for operating leases.

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Retirement Plans	RETIREMENT PLANS We provide defined-contribution benefits to eligible employees, as well as some remaining defined-benefit pension and other post-retirement benefits. Substantially all of our plans use a December 31 measurement date consistent with our fiscal year. Retirement Plan Summary Information Defined-contribution Benefits. We provide eligible employees the opportunity to participate in defined-contribution savings plans (commonly known as 401(k) plans), which permit contributions on a before-tax and after-tax basis. Employees may contribute to various investment alternatives. In most of these plans, we match a portion of the employees’ contributions. Our contributions to these plans totaled $333 in 2019 , $302 in 2018 and $274 in 2017 . The defined-contribution plans held approximately 20 million shares of our common stock, representing approximately 7% of our outstanding shares on December 31, 2019 and 2018 . Pension Benefits. We have twelve noncontributory and five contributory trusteed, qualified defined-benefit pension plans covering eligible government business employees, and two noncontributory and four contributory plans covering eligible commercial business employees, including some employees of our international operations. The primary factors affecting the benefits earned by participants in our pension plans are employees’ years of service and compensation levels. Our primary government pension plans, which comprise the majority of our unfunded obligation, were closed to new salaried participants on January 1, 2007. Additionally, we made changes to these plans for certain participants effective in 2014 that limit or cease the benefits that accrue for future service. We made similar changes to our primary commercial pension plan in 2015. We made additional changes to some of our pension plans effective in 2019 that further limit or cease the benefits that accrue for future service. We also sponsor one funded and several unfunded non-qualified supplemental executive retirement plans, which provide participants with additional benefits, including excess benefits over limits imposed on qualified plans by federal tax law. Other Post-retirement Benefits. We maintain plans that provide post-retirement healthcare and life insurance coverage for certain employees and retirees. These benefits vary by employment status, age, service and salary level at retirement. The coverage provided and the extent to which the retirees share in the cost of the program vary throughout the company. The plans provide health and life insurance benefits only to those employees who retire directly from our service and not to those who terminate service prior to eligibility for retirement. Contributions and Benefit Payments It is our policy to fund our defined-benefit retirement plans in a manner that optimizes the tax deductibility and contract recovery of contributions considered within our capital deployment framework. Therefore, we may make discretionary contributions in addition to the required contributions determined in accordance with IRS regulations. We contributed $185 to our pension plans in 2019. In 2020 , our required contributions are approximately $470 . We maintain several tax-advantaged accounts, primarily Voluntary Employees’ Beneficiary Association (VEBA) trusts, to fund the obligations for some of our other post-retirement benefit plans. For non-funded plans, claims are paid as received. Contributions to our other post-retirement benefit plans were not material in 2019 and are not expected to be material in 2020 . We expect the following benefits to be paid from our retirement plans over the next 10 years: Pension Benefits Other Post-retirement 2020 $ 853 $ 66 2021 880 65 2022 905 64 2023 929 63 2024 957 62 2025-2029 5,020 286 Government Contract Considerations Our contractual arrangements with the U.S. government provide for the recovery of contributions to our pension and other post-retirement benefit plans covering employees working in our defense segments. For non-funded plans, our government contracts allow us to recover claims paid. Following payment, these recoverable amounts are allocated to contracts and billed to the customer in accordance with the Cost Accounting Standards (CAS) and specific contractual terms. For some of these plans, the cumulative pension and other post-retirement benefit cost exceeds the amount currently allocable to contracts. To the extent we consider recovery of the cost to be probable based on our backlog and probable follow-on contracts, we defer the excess in other contract costs in other current assets on the Consolidated Balance Sheet until the cost is allocable to contracts. See Note A for a discussion of our other contract costs. For other plans, the amount allocated to contracts and included in revenue has exceeded the plans’ cumulative benefit cost. We have similarly deferred recognition of these excess earnings on the Consolidated Balance Sheet. Defined-benefit Retirement Plan Summary Financial Information Estimating retirement plan assets, liabilities and costs requires the extensive use of actuarial assumptions. These include the long-term rate of return on plan assets, the interest rates used to discount projected benefit payments, healthcare cost trend rates and future salary increases. Given the long-term nature of the assumptions being made, actual outcomes can and often do differ from these estimates. Our annual benefit cost consists of four primary elements: the cost of benefits earned by employees for services rendered during the year, an interest charge on our plan liabilities, an assumed return on our plan assets for the year, and other gains and losses, which result from changes in actuarial assumptions, differences between the actual and assumed long-term rate of return on assets, and changes we make to plan benefit terms. These gains and losses are initially deferred in AOCL and then amortized over future years as a component of our annual benefit cost. We amortize actuarial differences under qualified plans on a straight-line basis over the average remaining service period of eligible employees. If all or almost all of a plan’s participants are inactive or are not accruing additional benefits, we amortize these differences over the average remaining life expectancy of the plan participants. We recognize the difference between the actual and expected return on plan assets for qualified plans over five years . The deferral of these differences reduces the volatility of our annual benefit cost that can result either from year-to-year changes in the assumptions or from actual results that are not necessarily representative of the long-term financial position of these plans. We recognize differences under nonqualified plans immediately. Net annual defined-benefit pension and other post-retirement benefit cost (credit) consisted of the following: Pension Benefits Year Ended December 31 2019 2018 2017 Service cost $ 111 $ 180 $ 168 Interest cost 600 532 453 Expected return on plan assets (911 ) (856 ) (679 ) Recognized net actuarial loss 326 359 362 Amortization of prior service credit (19 ) (46 ) (66 ) Net annual benefit cost $ 107 $ 169 $ 238 Other Post-retirement Benefits Year Ended December 31 2019 2018 2017 Service cost $ 8 $ 10 $ 9 Interest cost 35 33 30 Expected return on plan assets (36 ) (40 ) (34 ) Recognized net actuarial gain (8 ) (4 ) (4 ) Amortization of prior service credit (3 ) (4 ) (3 ) Net annual benefit credit $ (4 ) $ (5 ) $ (2 ) The service cost component of net annual benefit cost (credit) is reported separately from the other components of net annual benefit cost (credit) in accordance with ASU 2017-07. We recognize an asset or liability on the Consolidated Balance Sheet equal to the funded status of each of our defined-benefit retirement plans. The funded status is the difference between the fair value of the plan’s assets and its benefit obligation. The following is a reconciliation of the benefit obligations and plan/trust assets, and the resulting funded status, of our defined-benefit retirement plans: Pension Benefits Other Post-retirement Benefits Year Ended December 31 2019 2018 2019 2018 Change in Benefit Obligation Benefit obligation at beginning of year $ (15,720 ) $ (14,212 ) $ (935 ) $ (996 ) Service cost (111 ) (180 ) (8 ) (10 ) Interest cost (600 ) (532 ) (35 ) (33 ) Acquisitions — (2,758 ) — (62 ) Amendments (3 ) 15 (8 ) — Actuarial (loss) gain (2,446 ) 1,183 (101 ) 78 Settlement/curtailment/other (33 ) 23 (4 ) 21 Benefits paid 806 741 64 67 Benefit obligation at end of year $ (18,107 ) $ (15,720 ) $ (1,027 ) $ (935 ) Change in Plan/Trust Assets Fair value of assets at beginning of year $ 11,532 $ 10,130 $ 570 $ 541 Actual return on plan assets 2,206 (749 ) 117 (4 ) Acquisitions — 2,328 — 77 Employer contributions 185 571 2 1 Settlement/curtailment/other 39 (26 ) — — Benefits paid (785 ) (722 ) (45 ) (45 ) Fair value of assets at end of year $ 13,177 $ 11,532 $ 644 $ 570 Funded status at end of year $ (4,930 ) $ (4,188 ) $ (383 ) $ (365 ) The overall increase in our pension benefit obligation for the year ended December 31, 2019, was due primarily to actuarial losses created by the change in the weighted-average discount rate, which decreased from 4.28% at December 31, 2018, to 3.19% at December 31, 2019. The overall increases in our pension benefit obligation and assets for the year ended December 31, 2018, were due primarily to the acquisition of CSRA retirement plans. The increase in the obligation due to acquired plans was offset partially by actuarial gains created by the change in the weighted-average discount rate, which increased from 3.69% at December 31, 2017, to 4.28% at December 31, 2018. Amounts recognized on the Consolidated Balance Sheet consisted of the following: Pension Benefits Other Post-retirement Benefits December 31 2019 2018 2019 2018 Noncurrent assets $ 61 $ 67 $ 94 $ 74 Current liabilities (166 ) (131 ) (130 ) (141 ) Noncurrent liabilities (4,825 ) (4,124 ) (347 ) (298 ) Net liability recognized $ (4,930 ) $ (4,188 ) $ (383 ) $ (365 ) Amounts deferred in AOCL for our retirement plans consisted of the following: Pension Benefits Other Post-retirement Benefits December 31 2019 2018 2019 2018 Net actuarial loss (gain) $ 5,784 $ 4,959 $ (9 ) $ (37 ) Prior service (credit) cost (73 ) (95 ) 12 1 Total amount recognized in AOCL, pretax $ 5,711 $ 4,864 $ 3 $ (36 ) The following is a reconciliation of the change in AOCL for our retirement plans: Pension Benefits Other Post-retirement Benefits Year Ended December 31 2019 2018 2019 2018 Net actuarial loss (gain) $ 1,151 $ 422 $ 20 $ (34 ) Prior service credit (cost) 3 (15 ) 8 — Amortization of: Net actuarial (loss) gain from prior years (326 ) (359 ) 8 4 Prior service credit 19 46 3 4 Other* — (5 ) — (2 ) Change in AOCL, pretax $ 847 $ 89 $ 39 $ (28 ) * Includes foreign exchange translation, curtailment and other adjustments. A pension plan’s funded status is the difference between the plan’s assets and its projected benefit obligation (PBO). The PBO is the present value of future benefits attributed to employee services rendered to date, including assumptions about future compensation levels. On December 31, 2019 and 2018 , most of our pension plans had a PBO that exceeded the plans’ assets. Summary information for those plans follows: December 31 2019 2018 PBO $ (17,651 ) $ (15,354 ) Fair value of plan assets 12,673 11,116 A retirement plan’s accumulated benefit obligation (ABO) is the present value of future benefits attributed to employee services rendered to date, excluding assumptions about future compensation levels for pension plans. The ABO for all defined-benefit pension plans was $17.8 billion and $15.5 billion on December 31, 2019 and 2018 , respectively. The ABO for all other post-retirement plans was $1 billion and $935 on December 31, 2019 and 2018 , respectively. On December 31, 2019 and 2018 , most of our retirement plans had an ABO that exceeded the plans’ assets. Summary information for those plans follows: Pension Benefits Other Post-retirement Benefits December 31 2019 2018 2019 2018 ABO $ (17,080 ) $ (14,856 ) $ (783 ) $ (709 ) Fair value of plan assets 12,354 10,832 301 264 Retirement Plan Assumptions We calculate the plan assets and liabilities for a given year and the net annual benefit cost for the subsequent year using assumptions determined as of December 31 of the year in question. The following table summarizes the weighted average assumptions used to determine our benefit obligations: Assumptions on December 31 2019 2018 Pension Benefits Benefit obligation discount rate 3.19 % 4.28 % Rate of increase in compensation levels 2.68 % 2.79 % Other Post-retirement Benefits Benefit obligation discount rate 3.18 % 4.24 % Healthcare cost trend rate: Trend rate for next year 6.00 % 6.50 % Ultimate trend rate 5.00 % 5.00 % Year rate reaches ultimate trend rate 2024 2024 The following table summarizes the weighted average assumptions used to determine our net annual benefit cost: Assumptions for Year Ended December 31 2019 2018 2017 Pension Benefits Discount rates: Benefit obligation 4.28 % 3.69 % 4.19 % Service cost 3.81 % 3.51 % 4.13 % Interest cost 3.92 % 3.34 % 3.56 % Expected long-term rate of return on assets 7.46 % 7.45 % 7.43 % Rate of increase in compensation levels 2.77 % 2.79 % 2.90 % Other Post-retirement Benefits Discount rates: Benefit obligation 4.24 % 3.64 % 4.11 % Service cost 4.23 % 3.79 % 4.34 % Interest cost 3.88 % 3.27 % 3.43 % Expected long-term rate of return on assets 6.84 % 7.75 % 7.76 % We base the discount rates on a current yield curve developed from a portfolio of high-quality, fixed-income investments with maturities consistent with the projected benefit payout period. We use the spot rate approach to identify individual spot rates along the yield curve that correspond with the timing of each projected service cost and discounted benefit obligation payment. We determine the long-term rates of return on assets based on consideration of historical and forward-looking returns and the current and expected asset allocation strategy. We decreased the expected long-term rate of return on assets in our primary U.S. government and commercial pension plans by 75 basis points beginning in 2017, and we decreased the expected long-term rates of return on assets in our primary U.S. other post-retirement benefit plans by 100 basis points beginning in 2019, both following an assessment of the historical and expected long-term returns of our various asset classes. Retirement plan assumptions are based on our best judgment, including consideration of current and future market conditions. Changes in these estimates impact future pension and other post-retirement benefit cost. As discussed above, we defer recognition of the cumulative benefit cost for our government plans in excess of costs allocated to contracts and included in revenue. Therefore, the impact of annual changes in financial reporting assumptions on the cost for these plans does not immediately affect our operating results. Plan Assets A committee of our board of directors is responsible for the strategic oversight of our defined-benefit retirement plan assets held in trust. Management develops investment policies and provides oversight of a third-party investment manager who reports to the committee on a regular basis. The outsourced third-party investment manager develops investment strategies and makes all day-to-day investment decisions related to defined-benefit retirement plan assets in accordance with our investment policy and target allocation percentages. Our investment policy endeavors to strike the appropriate balance among capital preservation, asset growth and current income. The objective of our investment policy is to generate future returns consistent with our assumed long-term rates of return used to determine our benefit obligations and net annual benefit cost. Target allocation percentages vary over time depending on the perceived risk and return potential of various asset classes and market conditions. At the end of 2019 , our asset allocation policy ranges were: Equities 48-68% Fixed income 20-48% Cash 0-5% Other asset classes 0-16% More than 90% of our pension plan assets are held in a single trust for our primary U.S. government and commercial pension plans. On December 31, 2019 , the trust was invested largely in publicly traded equities, fixed-income securities and commingled funds comprised of equity securities. The trust also invests in other asset classes consistent with our investment policy. Our investment policy allows the use of derivative instruments when appropriate to reduce anticipated asset volatility, to gain exposure to an asset class or to adjust the duration of fixed-income assets. We hold assets in VEBA trusts for some of our other post-retirement benefit plans. These assets are managed by a third-party investment manager with oversight by management and are generally invested in publicly traded equities, fixed-income securities and commingled funds comprised of equity and fixed-income securities. Our asset allocation strategy for the VEBA trusts considers potential fluctuations in our other post-retirement benefit obligation, the taxable nature of certain VEBA trusts, tax deduction limits on contributions and the regulatory environment. Our retirement plan assets are reported at fair value. See Note E for a discussion of the hierarchy for determining fair value. Our Level 1 assets include investments in publicly traded equity securities. These securities are actively traded and valued using quoted prices for identical securities from the market exchanges. Our Level 2 assets consist of fixed-income securities and commingled funds whose underlying investments are valued using observable marketplace inputs. The fair value of plan assets invested in fixed-income securities is generally determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets. Our plan assets that are invested in commingled funds are valued using a unit price or net asset value (NAV) that is based on the underlying investments of the fund. Our Level 3 assets include real estate funds, insurance deposit contracts, retirement annuity contracts and direct private equity investments. Certain investments valued using NAV as a practical expedient are excluded from the fair value hierarchy. These investments are redeemable at NAV on a monthly or quarterly basis and have redemption notice periods of up to 90 days . The unfunded commitments related to these investments were not material on December 31, 2019 or 2018. The fair value of our pension plan assets by investment category and the corresponding level within the fair value hierarchy were as follows: Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category December 31, 2019 Cash and equivalents $ 56 $ — $ 56 $ — Equity securities (a): U.S. companies 958 958 — — Non-U.S. companies 128 128 — — Private equity investments 26 — — 26 Fixed-income securities: Corporate bonds (b) 2,163 — 2,163 — Treasury securities 1,855 — 1,855 — Commingled funds: Equity funds 6,494 — 6,494 — Fixed-income funds 365 — 365 — Real estate funds 84 — — 84 Other investments: Insurance deposit contracts 137 — — 137 Retirement annuity contracts 35 — — 35 Total plan assets in fair value hierarchy $ 12,301 $ 1,086 $ 10,933 $ 282 Plan assets measured using NAV as a practical expedient (c): Real estate funds 443 Hedge funds 419 Equity funds 14 Total pension plan assets $ 13,177 (a) No single equity holding amounted to more than 1% of the total fair value. (b) Our corporate bond investments had an average rating of A . (c) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category December 31, 2018 Cash and equivalents $ 73 $ — $ 73 $ — Equity securities (a): U.S. companies 732 732 — — Non-U.S. companies 117 117 — — Private equity investments 20 — — 20 Fixed-income securities: Corporate bonds (b) 1,600 — 1,600 — Treasury securities 1,410 — 1,410 — Commingled funds: Equity funds 5,243 — 5,243 — Fixed-income funds 624 — 624 — Real estate funds 68 — — 68 Other investments: Insurance deposit contracts 128 — — 128 Total plan assets in fair value hierarchy $ 10,015 $ 849 $ 8,950 $ 216 Plan assets measured using NAV as a practical expedient (c): Hedge funds 910 Real estate funds 420 Fixed-income funds 101 Equity funds 86 Total pension plan assets $ 11,532 (a) No single equity holding amounted to more than 1% of the total fair value. (b) Our corporate bond investments had an average rating of A+ . (c) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. The fair value of our other post-retirement benefit plan assets by category and the corresponding level within the fair value hierarchy were as follows: Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Asset Category (a) December 31, 2019 Cash and equivalents $ 18 $ — $ 18 Equity securities 92 92 — Fixed-income securities 122 — 122 Commingled funds: Equity funds 288 — 288 Fixed-income funds 113 — 113 Real estate funds 2 2 — Total plan assets in fair value hierarchy $ 635 $ 94 $ 541 Plan assets measured using NAV as a practical expedient (b): Real estate funds 5 Hedge funds 4 Total other post-retirement benefit plan assets $ 644 (a) We had no Level 3 investments on December 31, 2019 . (b) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Asset Category (a) December 31, 2018 Cash and equivalents $ 23 $ — $ 23 Equity securities 80 80 — Fixed-income securities 87 — 87 Commingled funds: Equity funds 237 — 237 Fixed-income funds 111 — 111 Real estate funds 2 2 — Total plan assets in fair value hierarchy $ 540 $ 82 $ 458 Plan assets measured using NAV as a practical expedient (b): Hedge funds 22 Equity funds 3 Fixed-income funds 3 Real estate funds 2 Total other post-retirement benefit plan assets $ 570 (a) We had no Level 3 investments on December 31, 2018 . (b) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. Changes in our Level 3 retirement plan assets during 2019 and 2018 were as follows: Private Equity Investments Real Estate Funds Insurance Deposits Contracts Retirement Annuity Contracts Total Level 3 Assets December 31, 2017 $ 18 $ 51 $ 120 $ — $ 189 Actual return on plan assets: Unrealized losses, net — (1 ) — — (1 ) Realized gains, net — — 3 — 3 Purchases, sales and settlements, net 2 18 5 — 25 December 31, 2018 20 68 128 — 216 Actual return on plan assets: Unrealized gains, net 5 6 6 — 17 Purchases, sales and settlements, net 1 10 3 35 49 December 31, 2019 $ 26 $ 84 $ 137 $ 35 $ 282

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION We have five operating segments: Aerospace, Combat Systems, Information Technology, Mission Systems and Marine Systems. We organize our segments in accordance with the nature of products and services offered. We measure each segment’s profitability based on operating earnings. As a result, we do not allocate net interest, other income and expense items, and income taxes to our segments. Summary financial information for each of our segments follows: Revenue Operating Earnings Revenue from U.S. Government Year Ended December 31 2019 2018 2017 2019 2018 2017 2019 2018 2017 Aerospace $ 9,801 $ 8,455 $ 8,129 $ 1,532 $ 1,490 $ 1,577 $ 498 $ 334 $ 231 Combat Systems 7,007 6,241 5,949 996 962 937 4,048 3,228 3,084 Information Technology 8,422 8,269 4,410 628 608 373 8,240 8,025 4,164 Mission Systems 4,937 4,726 4,481 683 659 638 3,994 3,774 3,629 Marine Systems 9,183 8,502 8,004 785 761 685 9,027 8,245 7,913 Corporate — — — 24 (23 ) 26 — — — Total $ 39,350 $ 36,193 $ 30,973 $ 4,648 $ 4,457 $ 4,236 $ 25,807 $ 23,606 $ 19,021 Corporate operating results have two primary components: pension and other post-retirement benefit income, and stock option expense. We are required to report the non-service cost components of pension and other post-retirement benefit cost (e.g., interest cost) in other income (expense) in the Consolidated Statement of Earnings. As described in Note R, in our defense segments, pension and other post-retirement benefit costs are recoverable contract costs. Therefore, the non-service cost components are included in the operating results of these segments, but an offset is reported in Corporate. Corporate operating results in 2018 also included one-time charges of approximately $45 associated with the costs to complete the CSRA acquisition. The following is additional summary financial information for each of our segments: Identifiable Assets Capital Expenditures Depreciation and Amortization Year Ended December 31 2019 2018 2017 2019 2018 2017 2019 2018 2017 Aerospace $ 12,324 $ 11,220 $ 10,126 $ 138 $ 194 $ 132 $ 178 $ 154 $ 147 Combat Systems 11,220 9,853 9,846 109 91 84 85 87 86 Information Technology 14,248 14,159 3,021 147 62 16 377 333 32 Mission Systems 6,205 5,984 5,856 75 49 47 60 65 60 Marine Systems 3,918 3,130 2,906 449 243 123 122 116 109 Corporate* 926 1,062 3,291 69 51 26 7 8 7 Total $ 48,841 $ 45,408 $ 35,046 $ 987 $ 690 $ 428 $ 829 $ 763 $ 441 * Corporate identifiable assets are primarily cash and equivalents. See Note C for additional revenue information by segment. The following table presents our revenue by geographic area based on the location of our customers: Year Ended December 31 2019 2018 2017 North America: United States $ 31,982 $ 28,578 $ 23,519 Other 852 755 915 Total North America 32,834 29,333 24,434 Europe 2,808 2,772 2,558 Asia/Pacific 1,670 2,252 2,011 Africa/Middle East 1,739 1,565 1,655 South America 299 271 315 Total revenue $ 39,350 $ 36,193 $ 30,973 Our revenue from non-U.S. operations was $4.4 billion in 2019 , $4.2 billion in 2018 and $3.7 billion in 2017 , and earnings from continuing operations before income taxes from non-U.S. operations were $600 in 2019 , $578 in 2018 and $550 in 2017 . The long-lived assets associated with these operations were 4% of our total long-lived assets on December 31, 2019 , 3% on December 31, 2018 , and 5% on December 31, 2017.

Condensed Consolidating Financi

Condensed Consolidating Financial Statements	12 Months Ended
	Dec. 31, 2019
Consolidating Financial Statements [Abstract]
Condensed Consolidating Financial Statements	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS The fixed- and floating-rate notes described in Note K are fully and unconditionally guaranteed on an unsecured, joint and several basis by several of our 100 %-owned subsidiaries (the guarantors). The following condensed consolidating financial statements illustrate the composition of the parent, the guarantors on a combined basis (each guarantor together with its majority-owned subsidiaries) and all other subsidiaries on a combined basis. CONDENSED CONSOLIDATING STATEMENT OF EARNINGS Year Ended December 31, 2019 Parent Guarantors on a Combined Basis Other Subsidiaries Consolidating Adjustments Total Consolidated Revenue $ — $ 30,566 $ 8,784 $ — $ 39,350 Cost of sales 99 (25,120 ) (7,270 ) — (32,291 ) G&A (75 ) (1,725 ) (611 ) — (2,411 ) Operating earnings 24 3,721 903 — 4,648 Interest, net (426 ) 1 (35 ) — (460 ) Other, net (60 ) 15 59 — 14 Earnings before income tax (462 ) 3,737 927 — 4,202 Provision for income tax, net 117 (626 ) (209 ) — (718 ) Equity in net earnings of subsidiaries 3,829 — — (3,829 ) — Net earnings $ 3,484 $ 3,111 $ 718 $ (3,829 ) $ 3,484 Comprehensive income $ 3,043 $ 3,083 $ 957 $ (4,040 ) $ 3,043 Year Ended December 31, 2018 Revenue $ — $ 28,132 $ 8,061 $ — $ 36,193 Cost of sales 67 (22,841 ) (6,704 ) — (29,478 ) G&A (90 ) (1,638 ) (530 ) — (2,258 ) Operating earnings (23 ) 3,653 827 — 4,457 Interest, net (326 ) — (30 ) — (356 ) Other, net (81 ) 12 53 — (16 ) Earnings before income tax (430 ) 3,665 850 — 4,085 Provision for income tax, net 116 (677 ) (166 ) — (727 ) Discontinued operations, net of tax (13 ) — — — (13 ) Equity in net earnings of subsidiaries 3,672 — — (3,672 ) — Net earnings $ 3,345 $ 2,988 $ 684 $ (3,672 ) $ 3,345 Comprehensive income $ 3,025 $ 2,992 $ 305 $ (3,297 ) $ 3,025 Year Ended December 31, 2017 Revenue $ — $ 26,933 $ 4,040 $ — $ 30,973 Cost of sales 76 (21,695 ) (3,112 ) — (24,731 ) G&A (48 ) (1,643 ) (315 ) — (2,006 ) Operating earnings 28 3,595 613 — 4,236 Interest, net (97 ) 1 (7 ) — (103 ) Other, net (72 ) 12 4 — (56 ) Earnings before income tax (141 ) 3,608 610 — 4,077 Provision for income tax, net 154 (1,262 ) (57 ) — (1,165 ) Equity in net earnings of subsidiaries 2,899 — — (2,899 ) — Net earnings $ 2,912 $ 2,346 $ 553 $ (2,899 ) $ 2,912 Comprehensive income $ 3,479 $ 2,336 $ 1,158 $ (3,494 ) $ 3,479 CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2019 Parent* Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 601 $ — $ 301 $ — $ 902 Accounts receivable — 1,188 2,356 — 3,544 Unbilled receivables — 2,826 5,031 — 7,857 Inventories — 6,191 115 — 6,306 Other current assets (300 ) 989 482 — 1,171 Total current assets 301 11,194 8,285 — 19,780 Noncurrent assets: PP&E 346 7,741 1,674 — 9,761 Accumulated depreciation of PP&E (91 ) (4,260 ) (935 ) — (5,286 ) Intangible assets, net — 210 2,105 — 2,315 Goodwill — 7,960 11,717 — 19,677 Other assets 203 1,278 1,113 — 2,594 Net investment in subsidiaries 29,693 — — (29,693 ) — Total noncurrent assets 30,151 12,929 15,674 (29,693 ) 29,061 Total assets $ 30,452 $ 24,123 $ 23,959 $ (29,693 ) $ 48,841 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ 2,497 $ 2 $ 421 $ — $ 2,920 Customer advances and deposits — 4,174 2,974 — 7,148 Other current liabilities 487 4,391 1,855 — 6,733 Total current liabilities 2,984 8,567 5,250 — 16,801 Noncurrent liabilities: Long-term debt 8,928 67 15 — 9,010 Other liabilities 4,963 2,995 1,495 — 9,453 Total noncurrent liabilities 13,891 3,062 1,510 — 18,463 Total shareholders’ equity 13,577 12,494 17,199 (29,693 ) 13,577 Total liabilities and shareholders’ equity $ 30,452 $ 24,123 $ 23,959 $ (29,693 ) $ 48,841 * Includes the funded status of the company’s primary domestic qualified defined-benefit pension plans as the Parent has the ultimate obligation for the plans. CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2018 Parent* Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 460 $ — $ 503 $ — $ 963 Accounts receivable — 1,171 2,588 — 3,759 Unbilled receivables — 2,758 3,818 — 6,576 Inventories — 5,855 122 — 5,977 Other current assets (251 ) 647 518 — 914 Total current assets 209 10,431 7,549 — 18,189 Noncurrent assets: PP&E 273 7,177 1,522 — 8,972 Accumulated depreciation of PP&E (83 ) (4,071 ) (840 ) — (4,994 ) Intangible assets, net — 251 2,334 — 2,585 Goodwill — 8,031 11,563 — 19,594 Other assets 195 274 593 — 1,062 Net investment in subsidiaries 27,887 — — (27,887 ) — Total noncurrent assets 28,272 11,662 15,172 (27,887 ) 27,219 Total assets $ 28,481 $ 22,093 $ 22,721 $ (27,887 ) $ 45,408 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ 850 $ — $ 123 $ — $ 973 Customer advances and deposits — 4,541 2,729 — 7,270 Other current liabilities 552 3,944 2,000 — 6,496 Total current liabilities 1,402 8,485 4,852 — 14,739 Noncurrent liabilities: Long-term debt 11,398 39 7 — 11,444 Other liabilities 3,949 2,115 1,429 — 7,493 Total noncurrent liabilities 15,347 2,154 1,436 — 18,937 Total shareholders’ equity 11,732 11,454 16,433 (27,887 ) 11,732 Total liabilities and shareholders’ equity $ 28,481 $ 22,093 $ 22,721 $ (27,887 ) $ 45,408 * Includes the funded status of the company’s primary domestic qualified defined-benefit pension plans as the Parent has the ultimate obligation for the plans. CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Year Ended December 31, 2019 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Net cash provided by operating activities* $ (46 ) $ 2,918 $ 109 $ — $ 2,981 Cash flows from investing activities: Capital expenditures (68 ) (718 ) (201 ) — (987 ) Other, net 7 10 (24 ) — (7 ) Net cash used by investing activities (61 ) (708 ) (225 ) — (994 ) Cash flows from financing activities: Dividends paid (1,152 ) — — — (1,152 ) Repayments of commercial paper, net (850 ) — — — (850 ) Purchases of common stock (231 ) — — — (231 ) Other, net 24 (2 ) 214 — 236 Net cash used by financing activities (2,209 ) (2 ) 214 — (1,997 ) Net cash used by discontinued operations (51 ) — — — (51 ) Cash sweep/funding by parent 2,508 (2,208 ) (300 ) — — Net decrease in cash and equivalents 141 — (202 ) — (61 ) Cash and equivalents at beginning of year 460 — 503 — 963 Cash and equivalents at end of year $ 601 $ — $ 301 $ — $ 902 Year Ended December 31, 2018 Net cash provided by operating activities* $ (579 ) $ 2,954 $ 773 $ — $ 3,148 Cash flows from investing activities: Business acquisitions, net of cash acquired (9,749 ) (74 ) (276 ) — (10,099 ) Capital expenditures (51 ) (513 ) (126 ) — (690 ) Proceeds from sales of assets 90 472 — — 562 Other, net 4 (12 ) 1 — (7 ) Net cash used by investing activities (9,706 ) (127 ) (401 ) — (10,234 ) Cash flows from financing activities: Proceeds from fixed-rate notes 6,461 — — — 6,461 Purchases of common stock (1,769 ) — — — (1,769 ) Dividends paid (1,075 ) — — — (1,075 ) Proceeds from floating-rate notes 1,000 — — — 1,000 Proceeds from commercial paper, net 850 — — — 850 Repayment of CSRA accounts receivable purchase agreement — — (450 ) — (450 ) Other, net 3 35 31 — 69 Net cash provided by financing activities 5,470 35 (419 ) — 5,086 Net cash used by discontinued operations (20 ) — — — (20 ) Cash sweep/funding by parent 3,365 (2,862 ) (503 ) — — Net decrease in cash and equivalents (1,470 ) — (550 ) — (2,020 ) Cash and equivalents at beginning of year 1,930 — 1,053 — 2,983 Cash and equivalents at end of year $ 460 $ — $ 503 $ — $ 963 * Continuing operations only. CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Year Ended December 31, 2017 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Net cash provided by operating activities* $ 312 $ 2,371 $ 1,193 $ — $ 3,876 Cash flows from investing activities: Capital expenditures (26 ) (330 ) (72 ) — (428 ) Business acquisitions, net of cash acquired — (350 ) (49 ) — (399 ) Other, net 10 31 (2 ) — 39 Net cash used by investing activities (16 ) (649 ) (123 ) — (788 ) Cash flows from financing activities: Purchases of common stock (1,558 ) — — — (1,558 ) Dividends paid (986 ) — — — (986 ) Proceeds from fixed-rate notes 985 — — — 985 Repayment of fixed-rate notes (900 ) — — — (900 ) Other, net 63 (3 ) — — 60 Net cash used by financing activities (2,396 ) (3 ) — — (2,399 ) Net cash used by discontinued operations (40 ) — — — (40 ) Cash sweep/funding by parent 2,816 (1,719 ) (1,097 ) — — Net increase in cash and equivalents 676 — (27 ) — 649 Cash and equivalents at beginning of year 1,254 — 1,080 — 2,334 Cash and equivalents at end of year $ 1,930 $ — $ 1,053 $ — $ 2,983 * Continuing operations only.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Consolidation and Classification	Basis of Consolidation and Classification. The Consolidated Financial Statements include the accounts of General Dynamics Corporation and our wholly owned and majority-owned subsidiaries. We eliminate all inter-company balances and transactions in the Consolidated Financial Statements. Some prior-year amounts have been reclassified among financial statement accounts or disclosures to conform to the current-year presentation. Consistent with industry practice, we classify assets and liabilities related to long-term contracts as current, even though some of these amounts may not be realized within one year.
Use of Estimates	Use of Estimates. The nature of our business requires that we make estimates and assumptions in accordance with U.S. generally accepted accounting principles (GAAP). These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reporting period . We base our estimates on historical experience, currently available information and various other assumptions that we believe are reasonable under the circumstances . Actual results could differ from these estimates.
Discontinued Operations, Net of Tax	Discontinued Operations, Net of Tax. On April 3, 2018, we completed our acquisition of CSRA Inc. (CSRA). See Note B for further discussion of the acquisition. In the third quarter of 2018, we disposed of CSRA operations to address an organizational conflict of interest with respect to services provided to a government customer. In accordance with GAAP, the sale did not result in a gain for financial reporting purposes. However, the sale generated a taxable gain, resulting in tax expense of $13 .
Research and Development Expenses	Research and Development Expenses. Company-sponsored research and development (R&D) expenses, including Aerospace product-development costs, were $466 in 2019 , $502 in 2018 and $521 in 2017 . R&D expenses have trended downward over the three-year period with the completion of the G500 and G600 aircraft test programs, offset partially by increased activities associated with the development of the new G700 aircraft model. R&D expenses are included in operating costs and expenses in the Consolidated Statement of Earnings in the period in which they are incurred. Customer-sponsored R&D expenses are charged directly to the related contracts. The Aerospace segment has cost-sharing arrangements with some of its suppliers that enhance the segment’s internal development capabilities and offset a portion of the financial cost associated with the segment’s product development efforts. These arrangements explicitly state that supplier contributions are for reimbursement of costs we incur in the development of new aircraft models and technologies, and we retain substantial rights in the products developed under these arrangements. We record amounts received from these cost-sharing arrangements as a reduction of R&D expenses. We have no obligation to refund any amounts received under the agreements regardless of the outcome of the development efforts. Under the typical terms of an agreement, payments received from suppliers for their share of the costs are based on milestones and are recognized as received. Our policy is to defer payments in excess of the costs we have incurred.
Cash and Equivalents and Investments in Debt and Equity Securities	Cash and Equivalents and Investments in Debt and Equity Securities.
Other Contract Costs	Other Contract Costs. Other contract costs represent amounts that are not currently allocable to government contracts, such as a portion of our estimated workers’ compensation obligations, other insurance-related assessments, pension and other post-retirement benefits, and environmental expenses. These costs will become allocable to contracts generally after they are paid. We expect to recover these costs through ongoing business, including existing backlog and probable follow-on contracts. If the backlog in the future does not support the continued deferral of these costs, the profitability of our remaining contracts could be adversely affected.
Long-lived Assets and Goodwill	Long-lived Assets and Goodwill. We review long-lived assets, including intangible assets subject to amortization, for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. We assess the recoverability of the carrying value of assets held for use based on a review of undiscounted projected cash flows. Impairment losses, where identified, are measured as the excess of the carrying value of the long-lived asset over its estimated fair value as determined by discounted projected cash flows. Goodwill represents the purchase price paid in excess of the fair value of net tangible and intangible assets acquired in a business combination. We review goodwill for impairment annually at each of our reporting units or when circumstances indicate that the likelihood of an impairment is greater than 50%. Our reporting units are consistent with our operating segments in Note S . We use both qualitative and quantitative approaches when testing goodwill for impairment. When determining the approach to be used, we consider the current facts and circumstances of each reporting unit as well as the excess of each reporting unit’s estimated fair value over its carrying value based on our most recent quantitative assessments. Our qualitative approach evaluates the business environment and various events impacting the reporting unit including, but not limited to, macroeconomic conditions, changes in the business environment and reporting unit-specific events. If, based on the qualitative assessment, we determine that it is more likely than not that the fair value of a reporting unit is greater than its carrying value, then a quantitative assessment is not necessary. However, if a quantitative assessment is determined to be necessary, we use a two-step process to first identify potential goodwill impairment for a reporting unit by comparing its fair value to its carrying value and then, if necessary, measure the amount of the impairment loss. Our estimate of fair value is based primarily on the discounted projected cash flows of the underlying operations . As of December 31, 2019, we completed qualitative assessments for our Aerospace, Combat Systems, Mission Systems and Marine Systems reporting units as the estimated fair values of each of these reporting units significantly exceeded the respective carrying values based on our most recent quantitative assessments, which were performed as of December 31, 2018. Our qualitative assessments did not present indicators of impairment for these reporting units as of December 31, 2019. As of December 31, 2019, we completed a quantitative assessment for our Information Technology reporting unit, and the results indicated that no impairment existed. The Information Technology reporting unit’s estimated fair value exceeded its carrying value by approximately 25%, reflecting the size of the CSRA acquisition relative to the Information Technology reporting unit and its recent acquisition date. Given that the net book value of this business was recorded at its fair value at the acquisition date in 2018, the reporting unit’s carrying value, by default, continues to closely approximate its fair value as of December 31, 2019. As the carrying value and fair value of the Information Technology reporting unit are closely aligned, a material change in the fair value or carrying value could put the reporting unit at risk of goodwill impairment. For example, if the synergies from the acquisition or funding in the U.S. government budget for our contracts fall significantly below our projections, the fair value of the reporting unit would be negatively impacted. Similarly, an increase in interest rates would lower our discounted cash flows and negatively impact the fair value of the reporting unit. We believe the projections and assumptions we used in estimating fair value are reasonable, but it is possible actual experience could differ, impacting our fair value estimate.
Accounting Standards Updates	Accounting Standards Updates. On January 1, 2019, we adopted the following accounting standards issued by the Financial Accounting Standards Board (FASB): • Accounting Standards Codification (ASC) Topic 842, Leases. ASC Topic 842 requires the recognition of lease rights and obligations as assets and liabilities on the balance sheet. Previously, lessees were not required to recognize on the balance sheet assets and liabilities arising from operating leases. As we elected the cumulative-effect adoption method, prior-period information has not been restated. The standard provided several optional practical expedients for use in transition. We elected to use what the FASB has deemed the “package of practical expedients,” which allowed us not to reassess our previous conclusions about lease identification, lease classification and the accounting treatment for initial direct costs. We did not elect the practical expedient pertaining to the use of hindsight. The most significant effects of the standard on our Consolidated Financial Statements are (1) the recognition of new right-of-use assets and lease liabilities on our Consolidated Balance Sheet for our operating leases, and (2) significant new disclosures about our leasing activities (see Note P). We adopted the standard on January 1, 2019, and recognized operating lease liabilities and right-of-use assets of $1.4 billion based on the present value of the remaining lease payments over the lease term. The adoption did not result in a cumulative-effect adjustment to retained earnings. The new standard did not have a material impact on our results of operations, financial condition or cash flows. • ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans. ASU 2018-14 adds, removes and clarifies disclosure requirements for defined-benefit pension and other post-retirement benefit plans. The standard is effective retrospectively on January 1, 2020, with early adoption permitted. We adopted the standard in 2019, and the adoption did not have a material effect on our disclosures. There are several other accounting standards that have been issued by the FASB but are not yet effective, including ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 significantly changes how entities account for credit losses for financial assets and certain other instruments, including trade receivables and contract assets, that are not measured at fair value through net income. The ASU requires a number of changes to the assessment of credit losses, including the utilization of an expected credit loss model, which requires consideration of a broader range of information to estimate expected credit losses over the entire lifetime of the asset, including losses where probability is considered remote. Additionally, the standard requires the estimation of lifetime expected losses for trade receivables and contract assets that are classified as current. We adopted the standard on January 1, 2020. The adoption of the ASU did not have a material effect on our results of operations, financial condition or cash flows.
Revenue	REVENUE Performance Obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account for revenue. A contract’s transaction price is allocated to each distinct performance obligation within that contract and recognized as revenue when, or as, the performance obligation is satisfied. The majority of our contracts have a single performance obligation as the promise to transfer the individual goods or services is not separately identifiable from other promises in the contracts and is, therefore, not distinct. Some of our contracts have multiple performance obligations, most commonly due to the contract covering multiple phases of the product lifecycle (development, production, maintenance and support). For contracts with multiple performance obligations, we allocate the contract’s transaction price to each performance obligation using our best estimate of the standalone selling price of each distinct good or service in the contract. The primary method used to estimate standalone selling price is the expected cost plus a margin approach, under which we forecast our expected costs of satisfying a performance obligation and then add an appropriate margin for that distinct good or service. Contract modifications are routine in the performance of our contracts. Contracts are often modified to account for changes in contract specifications or requirements. In most instances, contract modifications are for goods or services that are not distinct and, therefore, are accounted for as part of the existing contract. Our performance obligations are satisfied over time as work progresses or at a point in time. Revenue from products and services transferred to customers over time accounted for 73% of our revenue in 2019 , 74% in 2018 and 71% in 2017 . Substantially all of our revenue in the defense segments is recognized over time, because control is transferred continuously to our customers. Typically, revenue is recognized over time using costs incurred to date relative to total estimated costs at completion to measure progress toward satisfying our performance obligations. Incurred cost represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Contract costs include labor, material, overhead and, when appropriate, G&A expenses. Revenue from goods and services transferred to customers at a point in time accounted for 27% of our revenue in 2019 , 26% in 2018 and 29% in 2017 . The majority of our revenue recognized at a point in time is for the manufacture of business-jet aircraft in our Aerospace segment. Revenue on these contracts is recognized when the customer obtains control of the asset, which is generally upon delivery and acceptance by the customer of the fully outfitted aircraft. On December 31, 2019 , we had $86.9 billion of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 35% of our remaining performance obligations as revenue in 2020, an additional 35% by 2022 and the balance thereafter. Contract Estimates. The majority of our revenue is derived from long-term contracts and programs that can span several years. Accounting for long-term contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For long-term contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events that often span several years. These assumptions include labor productivity and availability; the complexity of the work to be performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The nature of our contracts gives rise to several types of variable consideration, including claims and award and incentive fees. We include in our contract estimates additional revenue for submitted contract modifications or claims against the customer when we believe we have an enforceable right to the modification or claim, the amount can be estimated reliably and its realization is probable. In evaluating these criteria, we consider the contractual/legal basis for the claim, the cause of any additional costs incurred, the reasonableness of those costs and the objective evidence available to support the claim. We include award or incentive fees in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee. These estimates are based on historical award experience, anticipated performance and our best judgment at the time. Because of our certainty in estimating these amounts, they are included in the transaction price of our contracts and the associated remaining performance obligations. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up method. Under this method, the impact of the adjustment on profit recorded to date on a contract is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the period it is identified. Contract Balances. The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets), and customer advances and deposits (contract liabilities) on the Consolidated Balance Sheet. In our defense segments, amounts are billed as work progresses in accordance with agreed-upon contractual terms, either at periodic intervals (e.g., biweekly or monthly) or upon achievement of contractual milestones. Generally, billing occurs subsequent to revenue recognition, resulting in contract assets. However, we sometimes receive advances or deposits from our customers, particularly on our international contracts, before revenue is recognized, resulting in contract liabilities. These assets and liabilities are reported on the Consolidated Balance Sheet on a contract-by-contract basis at the end of each reporting period. Our segments operate under fixed-price, cost-reimbursement and time-and-materials contracts. Our production contracts are primarily fixed-price. Under these contracts, we agree to perform a specific scope of work for a fixed amount. Contracts for research, engineering, repair and maintenance, and other services are typically cost-reimbursement or time-and-materials. Under cost-reimbursement contracts, the customer reimburses contract costs incurred and pays a fixed, incentive or award-based fee. These fees are determined by our ability to achieve targets set in the contract, such as cost, quality, schedule and performance. Under time-and-materials contracts, the customer pays a fixed hourly rate for direct labor and generally reimburses us for the cost of materials. Each of these contract types presents advantages and disadvantages. Typically, we assume more risk with fixed-price contracts. However, these types of contracts offer additional profits when we complete the work for less than originally estimated. Cost-reimbursement contracts generally subject us to lower risk. Accordingly, the associated base fees are usually lower than fees earned on fixed-price contracts. Under time-and-materials contracts, our profit may vary if actual labor-hour rates vary significantly from the negotiated rates. Also, because these contracts can provide little or no fee for managing material costs, the content mix can impact profitability.
Earnings Per Share	Diluted EPS incorporates the additional shares issuable upon the assumed exercise of stock options and the release of restricted stock and restricted stock units (RSUs).We compute basic earnings per share (EPS) using net earnings for the period and the weighted average number of common shares outstanding during the period.
Fair Value of Financial Instruments	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between marketplace participants. Various valuation approaches can be used to determine fair value, each requiring different valuation inputs. The following hierarchy classifies the inputs used to determine fair value into three levels: • Level 1 - quoted prices in active markets for identical assets or liabilities; • Level 2 - inputs, other than quoted prices, observable by a marketplace participant either directly or indirectly; and • Level 3 - unobservable inputs significant to the fair value measurement. Our Level 1 assets include investments in publicly traded equity securities valued using quoted prices from the market exchanges. The fair value of our Level 2 assets and liabilities is determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets. Our Level 3 assets include direct private equity investments that are measured using inputs unobservable to a marketplace participant.
Income Tax Provision	Income Tax Provision. We calculate our provision for federal, state and international income taxes based on current tax law. U.S. federal tax reform was enacted on December 22, 2017, and has several key provisions impacting the accounting for and reporting of income taxes. The most significant provision reduced the U.S. corporate statutory tax rate from 35% to 21%
Tax Uncertainties	Tax Uncertainties. We participate in the IRS Compliance Assurance Process (CAP), a real-time audit of our consolidated federal corporate income tax return. The IRS has examined our consolidated federal income tax returns through 2017 and is currently reviewing our 2018 tax year. For all periods open to examination by tax authorities, we periodically assess our liabilities and contingencies based on the latest available information. Where we believe there is more than a 50% chance that our tax position will not be sustained, we record our best estimate of the resulting tax liability, including interest, in the Consolidated Financial Statements. We include any interest or penalties incurred in connection with income taxes as part of income tax expense. Based on all known facts and circumstances and current tax law, we believe the total amount of any unrecognized tax benefits on December 31, 2019 , was not material to our results of operations, financial condition or cash flows. In addition, there are no tax positions for which it is reasonably possible that the unrecognized tax benefits will vary significantly over the next 12 months, producing, individually or in the aggregate, a material effect on our results of operations, financial condition or cash flows.
Accounts and Unbilled Receivables	Accounts receivable represent amounts billed and currently due from customers. Payment is typically received from our customers either at periodic intervals (e.g., biweekly or monthly) or upon achievement of contractual milestones.Unbilled receivables represent revenue recognized on long-term contracts (contract costs and estimated profits) less associated advances and progress billings. These amounts will be billed in accordance with the agreed-upon contractual terms.
Inventories	The majority of our inventories are for business-jet aircraft. Our inventories are stated at the lower of cost or net realizable value. Work in process represents largely labor, material and overhead costs associated with aircraft in the manufacturing process and is based primarily on the estimated average unit cost in a production lot. Raw materials are valued primarily on the first-in, first-out method. We record pre-owned aircraft acquired in connection with the sale of new aircraft at the lower of the trade-in value or the estimated net realizable value.
Property, Plant and Equipment, Net	We depreciate most of our assets using the straight-line method and the remainder using accelerated methods. Buildings and improvements are depreciated over periods of up to 50 years . Machinery and equipment are depreciated over periods of up to 30 years
Derivative Financial Instruments and Hedging Activities	We are exposed to market risk, primarily from foreign currency exchange rates, interest rates, commodity prices and investments. We may use derivative financial instruments to hedge some of these risks as described below. We do not use derivative financial instruments for trading or speculative purposes. Foreign Currency Risk. Our foreign currency exchange rate risk relates to receipts from customers, payments to suppliers and inter-company transactions denominated in foreign currencies. To the extent possible, we include terms in our contracts that are designed to protect us from this risk. Otherwise, we enter into derivative financial instruments, principally foreign currency forward purchase and sale contracts, designed to offset and minimize our risk. The dollar-weighted one -year average maturity of these instruments generally matches the duration of the activities that are at risk. Interest Rate Risk. Our financial instruments subject to interest rate risk include fixed- and floating-rate long-term debt obligations. We entered into derivative financial instruments, specifically interest rate swap contracts, to eliminate our floating-rate interest risk. The interest rate risk associated with our financial instruments is not material. Commodity Price Risk. We are subject to rising labor and commodity price risk, primarily on long-term, fixed-price contracts. To the extent possible, we include terms in our contracts that are designed to protect us from these risks. Some of the protective terms included in our contracts are considered derivative financial instruments but are not accounted for separately, because they are clearly and closely related to the host contract. We have not entered into any material commodity hedging contracts but may do so as circumstances warrant. We do not believe that changes in labor or commodity prices will have a material impact on our results of operations or cash flows. Hedging Activities. We had notional forward exchange and interest rate swap contracts outstanding of $5 billion and $5.8 billion on December 31, 2019 and 2018 , respectively. These derivative financial instruments are cash flow hedges, and are reflected at fair value on the Consolidated Balance Sheet in other current assets and liabilities. See Note E for additional details. Changes in fair value (gains and losses) related to derivative financial instruments that qualify as cash flow hedges are deferred in AOCL until the underlying transaction is reflected in earnings. Alternatively, gains and losses on derivative financial instruments that do not qualify for hedge accounting are recorded each period in earnings. All gains and losses from derivative financial instruments recognized in the Consolidated Statement of Earnings are presented in the same line item as the underlying transaction, either operating costs and expenses or interest expense. Net gains and losses recognized in earnings on derivative financial instruments that do not qualify for hedge accounting were not material to our results of operations in any of the past three years. Net gains and losses reclassified to earnings from AOCL related to qualified hedges were also not material to our results of operations in any of the past three years, and we do not expect the amount of these gains and losses that will be reclassified to earnings during the next 12 months to be material.
Foreign Currency and Financial Statement Translation	Foreign Currency Financial Statement Translation. We translate foreign currency balance sheets from our international businesses’ functional currency (generally the respective local currency) to U.S. dollars at the end-of-period exchange rates, and statements of earnings at the average exchange rates for each period. The resulting foreign currency translation adjustments are a component of AOCL. We do not hedge the fluctuation in reported revenue and earnings resulting from the translation of these international operations’ results into U.S. dollars. The impact of translating our non-U.S. operations’ revenue into U.S. dollars was not material to our results of operations in any of the past three years. In addition, the effect of changes in foreign exchange rates on non-U.S. cash balances was not material in any of the past three years.
Commitments and Contingencies	Environmental We are subject to and affected by a variety of federal, state, local and foreign environmental laws and regulations. We are directly or indirectly involved in environmental investigations or remediation at some of our current and former facilities and third-party sites that we do not own but where we have been designated a Potentially Responsible Party (PRP) by the U.S. Environmental Protection Agency or a state environmental agency. Based on historical experience, we expect that a significant percentage of the total remediation and compliance costs associated with these facilities will continue to be allowable contract costs and, therefore, recoverable under U.S. government contracts. As required, we provide financial assurance for certain sites undergoing or subject to investigation or remediation. We accrue environmental costs when it is probable that a liability has been incurred and the amount can be reasonably estimated. Where applicable, we seek insurance recovery for costs related to environmental liabilities. We do not record insurance recoveries before collection is considered probable. Based on all known facts and analyses, we do not believe that our liability at any individual site, or in the aggregate, arising from such environmental conditions will be material to our results of operations, financial condition or cash flows. We also do not believe that the range of reasonably possible additional loss beyond what has been recorded would be material to our results of operations, financial condition or cash flows. Other Government Contracts. As a government contractor, we are subject to U.S. government audits and investigations relating to our operations, including claims for fines, penalties, and compensatory and treble damages. We believe the outcome of such ongoing government audits and investigations will not have a material impact on our results of operations, financial condition or cash flows. In the performance of our contracts, we routinely request contract modifications that require additional funding from the customer. Most often, these requests are due to customer-directed changes in the scope of work. While we are entitled to recovery of these costs under our contracts, the administrative process with our customer may be protracted. Based on the circumstances, we periodically file requests for equitable adjustment (REAs) that are sometimes converted into claims. In some cases, these requests are disputed by our customer. We believe our outstanding modifications, REAs and other claims will be resolved without material impact to our results of operations, financial condition or cash flows. Letters of Credit and Guarantees. Aircraft Trade-ins. In connection with orders for new aircraft in contract backlog, our Aerospace segment has outstanding options with some customers to trade in aircraft as partial consideration in their new-aircraft transaction. These trade-in commitments are generally structured to establish the fair market value of the trade-in aircraft at a date generally 45
Product Warranties	Product Warranties. We provide warranties to our customers associated with certain product sales. We record estimated warranty costs in the period in which the related products are delivered. The warranty liability recorded at each balance sheet date is based generally on the number of months of warranty coverage remaining for the products delivered and the average historical monthly warranty payments. Warranty obligations incurred in connection with long-term production contracts are accounted for within the contract estimates at completion. Our other warranty obligations, primarily for business-jet aircraft, are included in other current and noncurrent liabilities on the Consolidated Balance Sheet.
Equity Compensation Plans	We recognize compensation expense related to stock options on a straight-line basis over the vesting period of the awards, net of estimated forfeitures. Estimated forfeitures are based on our historical forfeiture experience. We estimate the fair value of stock options on the date of grant using the Black-Scholes option pricing model Equity Compensation Overview. We have equity compensation plans for employees, as well as for non-employee members of our board of directors. The equity compensation plans seek to provide an effective means of attracting and retaining directors, officers and key employees, and to provide them with incentives to enhance our growth and profitability. Under the equity compensation plans, awards may be granted to officers, employees or non-employee directors in common stock, options to purchase common stock, restricted shares of common stock, participation units or any combination of these. Equity-based Compensation Expense. Restricted Stock/RSUs. The fair value of restricted stock and RSUs equals the average of the high and low market prices of our common stock as listed on the NYSE on the date of grant. Grants of restricted stock are awards of shares of common stock. Participation units represent obligations that have a value derived from or related to the value of our common stock. These include stock appreciation rights, phantom stock units and RSUs, and are payable in cash or common stock. Restricted stock and RSUs generally vest over a three -year restriction period after the grant date, during which recipients may not sell, transfer, pledge, assign or otherwise convey their restricted shares to another party. During this period, restricted stock recipients receive cash dividends on their restricted shares and are entitled to vote those shares, while RSU recipients receive dividend-equivalent units instead of cash dividends and are not entitled to vote their RSUs or dividend-equivalent units. We grant RSUs with one or more performance measures determined by the compensation committee of the board of directors as described in our proxy statement. Depending on the company’s performance, the number of RSUs earned may be less than, equal to or greater than the original number of RSUs awarded subject to a payout range. Stock Options. Stock options granted under our equity compensation plans are issued with an exercise price at the fair value of our common stock determined by the average of the high and low stock prices as listed on the New York Stock Exchange (NYSE) on the date of grant. The majority of our outstanding stock options vest over three years , with 50% of the options vesting after two years and the remaining 50% vesting the following year, and expire 10 years after the grant date.
Retirement Plans	Retirement Plan Assumptions We calculate the plan assets and liabilities for a given year and the net annual benefit cost for the subsequent year using assumptions determined as of December 31 of the year in question. We base the discount rates on a current yield curve developed from a portfolio of high-quality, fixed-income investments with maturities consistent with the projected benefit payout period. We use the spot rate approach to identify individual spot rates along the yield curve that correspond with the timing of each projected service cost and discounted benefit obligation payment. We determine the long-term rates of return on assets based on consideration of historical and forward-looking returns and the current and expected asset allocation strategy. We decreased the expected long-term rate of return on assets in our primary U.S. government and commercial pension plans by 75 basis points beginning in 2017, and we decreased the expected long-term rates of return on assets in our primary U.S. other post-retirement benefit plans by 100 basis points beginning in 2019, both following an assessment of the historical and expected long-term returns of our various asset classes. Retirement plan assumptions are based on our best judgment, including consideration of current and future market conditions. Changes in these estimates impact future pension and other post-retirement benefit cost. As discussed above, we defer recognition of the cumulative benefit cost for our government plans in excess of costs allocated to contracts and included in revenue. Therefore, the impact of annual changes in financial reporting assumptions on the cost for these plans does not immediately affect our operating results. Government Contract Considerations Our contractual arrangements with the U.S. government provide for the recovery of contributions to our pension and other post-retirement benefit plans covering employees working in our defense segments. For non-funded plans, our government contracts allow us to recover claims paid. Following payment, these recoverable amounts are allocated to contracts and billed to the customer in accordance with the Cost Accounting Standards (CAS) and specific contractual terms. For some of these plans, the cumulative pension and other post-retirement benefit cost exceeds the amount currently allocable to contracts. To the extent we consider recovery of the cost to be probable based on our backlog and probable follow-on contracts, we defer the excess in other contract costs in other current assets on the Consolidated Balance Sheet until the cost is allocable to contracts. See Note A for a discussion of our other contract costs. For other plans, the amount allocated to contracts and included in revenue has exceeded the plans’ cumulative benefit cost. We have similarly deferred recognition of these excess earnings on the Consolidated Balance Sheet. Defined-benefit Retirement Plan Summary Financial Information Estimating retirement plan assets, liabilities and costs requires the extensive use of actuarial assumptions. These include the long-term rate of return on plan assets, the interest rates used to discount projected benefit payments, healthcare cost trend rates and future salary increases. Given the long-term nature of the assumptions being made, actual outcomes can and often do differ from these estimates. Our annual benefit cost consists of four primary elements: the cost of benefits earned by employees for services rendered during the year, an interest charge on our plan liabilities, an assumed return on our plan assets for the year, and other gains and losses, which result from changes in actuarial assumptions, differences between the actual and assumed long-term rate of return on assets, and changes we make to plan benefit terms. These gains and losses are initially deferred in AOCL and then amortized over future years as a component of our annual benefit cost. We amortize actuarial differences under qualified plans on a straight-line basis over the average remaining service period of eligible employees. If all or almost all of a plan’s participants are inactive or are not accruing additional benefits, we amortize these differences over the average remaining life expectancy of the plan participants. We recognize the difference between the actual and expected return on plan assets for qualified plans over five years . The deferral of these differences reduces the volatility of our annual benefit cost that can result either from year-to-year changes in the assumptions or from actual results that are not necessarily representative of the long-term financial position of these plans. We recognize differences under nonqualified plans immediately. Pension Benefits. We have twelve noncontributory and five contributory trusteed, qualified defined-benefit pension plans covering eligible government business employees, and two noncontributory and four contributory plans covering eligible commercial business employees, including some employees of our international operations. The primary factors affecting the benefits earned by participants in our pension plans are employees’ years of service and compensation levels. Our primary government pension plans, which comprise the majority of our unfunded obligation, were closed to new salaried participants on January 1, 2007. Additionally, we made changes to these plans for certain participants effective in 2014 that limit or cease the benefits that accrue for future service. We made similar changes to our primary commercial pension plan in 2015. We made additional changes to some of our pension plans effective in 2019 that further limit or cease the benefits that accrue for future service. We also sponsor one funded and several unfunded non-qualified supplemental executive retirement plans, which provide participants with additional benefits, including excess benefits over limits imposed on qualified plans by federal tax law. Other Post-retirement Benefits. We maintain plans that provide post-retirement healthcare and life insurance coverage for certain employees and retirees. These benefits vary by employment status, age, service and salary level at retirement. The coverage provided and the extent to which the retirees share in the cost of the program vary throughout the company. The plans provide health and life insurance benefits only to those employees who retire directly from our service and not to those who terminate service prior to eligibility for retirement. Contributions and Benefit Payments Plan Assets A committee of our board of directors is responsible for the strategic oversight of our defined-benefit retirement plan assets held in trust. Management develops investment policies and provides oversight of a third-party investment manager who reports to the committee on a regular basis. The outsourced third-party investment manager develops investment strategies and makes all day-to-day investment decisions related to defined-benefit retirement plan assets in accordance with our investment policy and target allocation percentages. 90% of our pension plan assets are held in a single trust for our primary U.S. government and commercial pension plans. On December 31, 2019 , the trust was invested largely in publicly traded equities, fixed-income securities and commingled funds comprised of equity securities. The trust also invests in other asset classes consistent with our investment policy. Our investment policy allows the use of derivative instruments when appropriate to reduce anticipated asset volatility, to gain exposure to an asset class or to adjust the duration of fixed-income assets. We hold assets in VEBA trusts for some of our other post-retirement benefit plans. These assets are managed by a third-party investment manager with oversight by management and are generally invested in publicly traded equities, fixed-income securities and commingled funds comprised of equity and fixed-income securities. Our asset allocation strategy for the VEBA trusts considers potential fluctuations in our other post-retirement benefit obligation, the taxable nature of certain VEBA trusts, tax deduction limits on contributions and the regulatory environment. Our retirement plan assets are reported at fair value. See Note E for a discussion of the hierarchy for determining fair value. Our Level 1 assets include investments in publicly traded equity securities. These securities are actively traded and valued using quoted prices for identical securities from the market exchanges. Our Level 2 assets consist of fixed-income securities and commingled funds whose underlying investments are valued using observable marketplace inputs. The fair value of plan assets invested in fixed-income securities is generally determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets. Our plan assets that are invested in commingled funds are valued using a unit price or net asset value (NAV) that is based on the underlying investments of the fund. Our Level 3 assets include real estate funds, insurance deposit contracts, retirement annuity contracts and direct private equity investments. Certain investments valued using NAV as a practical expedient are excluded from the fair value hierarchy. These investments are redeemable at NAV on a monthly or quarterly basis and have redemption notice periods of up to 90 days We provide defined-contribution benefits to eligible employees, as well as some remaining defined-benefit pension and other post-retirement benefits. Substantially all of our plans use a December 31 measurement date consistent with our fiscal year. Retirement Plan Summary Information Defined-contribution Benefits.
Segment Information	SEGMENT INFORMATION We have five operating segments: Aerospace, Combat Systems, Information Technology, Mission Systems and Marine Systems. We organize our segments in accordance with the nature of products and services offered. We measure each segment’s profitability based on operating earnings. As a result, we do not allocate net interest, other income and expense items, and income taxes to our segments.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Schedule of Net Interest Expense	Net interest expense consisted of the following: Year Ended December 31 2019 2018 2017 Interest expense $ 472 $ 374 $ 117 Interest income (12 ) (18 ) (14 ) Interest expense, net $ 460 $ 356 $ 103

Acquisitions and Divestitures_2

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations, Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed on Acquisition Date	The following table summarizes the allocation of the $9.7 billion cash purchase price to the estimated fair values of the assets acquired and liabilities assumed on the acquisition date, with the excess recorded as goodwill: Cash and equivalents $ 45 Accounts receivable 155 Unbilled receivables 415 Other current assets 303 Property, plant and equipment, net 326 Intangible assets, net 2,066 Goodwill 7,935 Other noncurrent assets 369 Total assets $ 11,614 Accounts payable $ (135 ) Customer advances and deposits (151 ) Current lease obligation (51 ) Other current liabilities (434 ) Noncurrent lease obligation (207 ) Noncurrent deferred tax liability (355 ) Other noncurrent liabilities (532 ) Total liabilities $ (1,865 ) Net assets acquired $ 9,749
Schedule of Pro Forma Information	The following pro forma information presents our consolidated revenue and earnings from continuing operations as if the acquisition of CSRA and the related financing transactions had occurred on January 1, 2017 : Year Ended December 31 2018 2017 Revenue $ 37,534 $ 35,828 Earnings from continuing operations 3,390 2,982 Diluted earnings per share from continuing operations $ 11.33 $ 9.79
Schedule of Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill by reporting unit were as follows: Aerospace Combat Systems Information Systems and Technology Information Technology Mission Systems Marine Systems Total Goodwill December 31, 2017 (a) $ 2,638 $ 2,677 $ 6,302 $ — $ — $ 297 $ 11,914 Acquisitions/ divestitures (b) — — 16 — — — 16 Other (c) 40 (14 ) (1 ) — — — 25 April 1, 2018 (a) 2,678 2,663 6,317 — — 297 11,955 Change in reporting unit composition (d) — — (6,317 ) 2,076 4,241 — — Acquisitions/ divestitures (b) 183 30 — 7,601 7 — 7,821 Other (c) (48 ) (60 ) — (55 ) (19 ) — (182 ) December 31, 2018 (e) 2,813 2,633 — 9,622 4,229 297 19,594 Acquisitions/ divestitures (b) 3 15 — 77 6 — 101 Other (c) 15 33 — 1 (67 ) — (18 ) December 31, 2019 (e) $ 2,831 $ 2,681 $ — $ 9,700 $ 4,168 $ 297 $ 19,677 (a) Goodwill in the Information Systems and Technology reporting unit is net of $1.9 billion of accumulated impairment losses. (b) Includes adjustments during the purchase price allocation period. Activity in the first quarter of 2018 and the nine-month period ended December 31, 2018 , also includes an allocation of goodwill associated with the sale of the commercial health products business and an allocation of goodwill associated with the sale of a public-facing contact-center business, respectively, as discussed above. (c) Consists primarily of adjustments for foreign currency translation. Activity in the nine-month period ended December 31, 2018, also includes an allocation of goodwill in our Information Technology reporting unit associated with certain operations classified as held for sale on the Consolidated Balance Sheet on December 31, 2018. Activity in 2019 also includes an allocation of goodwill in our Mission Systems reporting unit associated with a non-core operation classified as held for sale on the Consolidated Balance Sheet on December 31, 2019 . (d) Concurrent with the acquisition of CSRA, we reorganized our Information Systems and Technology operating segment, in accordance with the nature of the segment’s products and services, into the Information Technology and Mission Systems segments. This reorganization similarly changed the composition of our reporting units. Accordingly, goodwill of the Information Systems and Technology reporting unit was reassigned to the Information Technology and Mission Systems reporting units using a relative fair value allocation approach as of the date of the reorganization. (e) Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively.
Schedule of Intangible Assets	Intangible assets consisted of the following: Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount December 31 2019 2018 Contract and program intangible assets (b) $ 3,776 $ (1,779 ) $ 1,997 $ 3,771 $ (1,531 ) $ 2,240 Trade names and trademarks 474 (195 ) 279 469 (177 ) 292 Technology and software 164 (126 ) 38 165 (116 ) 49 Other intangible assets 159 (158 ) 1 159 (155 ) 4 Total intangible assets $ 4,573 $ (2,258 ) $ 2,315 $ 4,564 $ (1,979 ) $ 2,585 (a) Change in gross carrying amounts consists primarily of adjustments for acquired intangible assets and foreign currency translation. (b) Consists of acquired backlog and probable follow-on work and associated customer relationships.
Schedule of Amortization Lives (In Years) of Intangible Assets	The amortization lives (in years) of our intangible assets on December 31, 2019 , were as follows: Intangible Asset Range of Amortization Life Contract and program intangible assets 7-30 Trade names and trademarks 30 Technology and software 5-15 Other intangible assets 7
Schedule of Expected Annual Amortization Expense Over the Next Five Years of Intangible Assets	We expect to record annual amortization expense over the next five years as follows: Year Ended December 31 Amortization Expense 2020 $ 264 2021 220 2022 192 2023 177 2024 164

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue Recognition [Abstract]
Schedule of Impact of Adjustments in Contract Estimates	The aggregate impact of adjustments in contract estimates increased our revenue, operating earnings and diluted earnings per share as follows: Year Ended December 31 2019 2018 2017 Revenue $ 342 $ 377 $ 292 Operating earnings 271 345 323 Diluted earnings per share $ 0.74 $ 0.91 $ 0.69
Schedule of Revenue by Major Products and Services	Revenue by major products and services was as follows: Year Ended December 31 2019 2018 2017 Aircraft manufacturing and completions $ 7,355 $ 6,226 $ 6,320 Aircraft services 2,154 2,096 1,743 Pre-owned aircraft 292 133 66 Total Aerospace 9,801 8,455 8,129 Military vehicles 4,620 4,027 3,731 Weapons systems, armament and munitions 1,906 1,798 1,633 Engineering and other services 481 416 585 Total Combat Systems 7,007 6,241 5,949 IT services 8,422 8,269 4,410 Total Information Technology 8,422 8,269 4,410 C4ISR solutions 4,937 4,726 4,481 Total Mission Systems 4,937 4,726 4,481 Nuclear-powered submarines 6,254 5,712 5,175 Surface ships 1,912 1,872 1,607 Repair and other services 1,017 918 1,222 Total Marine Systems 9,183 8,502 8,004 Total revenue $ 39,350 $ 36,193 $ 30,973
Schedule of Revenue by Contract Type	Revenue by contract type was as follows: Year Ended December 31, 2019 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total Fixed-price $ 8,949 $ 6,049 $ 3,436 $ 2,908 $ 6,331 $ 27,673 Cost-reimbursement — 894 3,401 1,862 2,839 8,996 Time-and-materials 852 64 1,585 167 13 2,681 Total revenue $ 9,801 $ 7,007 $ 8,422 $ 4,937 $ 9,183 $ 39,350 Year Ended December 31, 2018 Fixed-price $ 7,600 $ 5,406 $ 3,396 $ 2,711 $ 5,493 $ 24,606 Cost-reimbursement — 800 3,422 1,861 3,004 9,087 Time-and-materials 855 35 1,451 154 5 2,500 Total revenue $ 8,455 $ 6,241 $ 8,269 $ 4,726 $ 8,502 $ 36,193 Year Ended December 31, 2017 Fixed-price $ 7,479 $ 5,090 $ 1,465 $ 2,478 $ 4,808 $ 21,320 Cost-reimbursement — 823 2,305 1,838 3,186 8,152 Time-and-materials 650 36 640 165 10 1,501 Total revenue $ 8,129 $ 5,949 $ 4,410 $ 4,481 $ 8,004 $ 30,973
Schedule of Revenue by Customer	Revenue by customer was as follows: Year Ended December 31, 2019 Aerospace Combat Systems Information Technology Mission Systems Marine Systems Total U.S. government: Department of Defense (DoD) $ 305 $ 3,695 $ 3,573 $ 3,454 $ 8,837 $ 19,864 Non-DoD 88 13 4,652 499 2 5,254 Foreign Military Sales (FMS) 105 340 15 41 188 689 Total U.S. government 498 4,048 8,240 3,994 9,027 25,807 U.S. commercial 5,477 229 176 151 142 6,175 Non-U.S. government 378 2,663 6 667 9 3,723 Non-U.S. commercial 3,448 67 — 125 5 3,645 Total revenue $ 9,801 $ 7,007 $ 8,422 $ 4,937 $ 9,183 $ 39,350 Year Ended December 31, 2018 U.S. government: DoD $ 236 $ 2,903 $ 3,213 $ 3,224 $ 8,098 $ 17,674 Non-DoD — 8 4,790 506 2 5,306 FMS 98 317 22 44 145 626 Total U.S. government 334 3,228 8,025 3,774 8,245 23,606 U.S. commercial 4,175 251 163 138 245 4,972 Non-U.S. government 551 2,698 81 662 10 4,002 Non-U.S. commercial 3,395 64 — 152 2 3,613 Total revenue $ 8,455 $ 6,241 $ 8,269 $ 4,726 $ 8,502 $ 36,193 Year Ended December 31, 2017 U.S. government: DoD $ 189 $ 2,702 $ 1,802 $ 3,027 $ 7,721 $ 15,441 Non-DoD — 8 2,340 556 — 2,904 FMS 42 374 22 46 192 676 Total U.S. government 231 3,084 4,164 3,629 7,913 19,021 U.S. commercial 3,885 220 214 108 71 4,498 Non-U.S. government 210 2,580 32 607 13 3,442 Non-U.S. commercial 3,803 65 — 137 7 4,012 Total revenue $ 8,129 $ 5,949 $ 4,410 $ 4,481 $ 8,004 $ 30,973

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Weighted Average Shares Outstanding	Basic and diluted weighted average shares outstanding were as follows (in thousands): Year Ended December 31 2019 2018 2017 Basic weighted average shares outstanding 288,286 295,262 299,172 Dilutive effect of stock options and restricted stock/RSUs* 2,550 3,898 5,465 Diluted weighted average shares outstanding 290,836 299,160 304,637 * Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the year and, therefore, the effect of including these options would be antidilutive. These options totaled 4,985 in 2019 , 3,143 in 2018 and 1,547 in 2017 .

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of Carrying And Fair Values Of Other Financial Assets And Liabilities	The following tables present the fair values of our other financial assets and liabilities on December 31, 2019 and 2018 , and the basis for determining their fair values: Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Financial Assets (Liabilities) December 31, 2019 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 24 $ 24 $ 11 $ 13 $ — Available-for-sale debt securities 129 129 — 129 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges 26 26 — 26 — Measured at amortized cost: Short- and long-term debt principal (12,005 ) (12,339 ) — (12,339 ) — December 31, 2018 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 29 $ 29 $ 23 $ 6 $ — Available-for-sale debt securities 121 121 — 121 — Equity securities 52 52 52 — — Other investments 4 4 — — 4 Cash flow hedges (69 ) (69 ) — (69 ) — Measured at amortized cost: Short- and long-term debt principal (12,518 ) (12,346 ) — (12,346 ) —

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of Net Provision For Income Taxes For Continuing Operations	The following is a summary of our net provision for income taxes for continuing operations: Year Ended December 31 2019 2018 2017 Current: U.S. federal $ 471 $ 587 $ 656 State 36 48 31 International 119 95 77 Total current 626 730 764 Deferred: U.S. federal 49 (37 ) 215 State 1 8 7 International 42 26 60 Adjustment for enacted change in U.S. tax law — — 119 Total deferred 92 (3 ) 401 Provision for income taxes, net $ 718 $ 727 $ 1,165 Net income tax payments $ 572 $ 532 $ 617
Schedule of Reconciliation From Statutory Federal Income Tax Rate To Effective Income Tax Rate	The reconciliation from the statutory federal income tax rate to our effective income tax rate follows: Year Ended December 31 2019 2018 2017 Statutory federal income tax rate 21.0 % 21.0 % 35.0 % State tax on commercial operations, net of federal benefits 0.7 1.1 0.6 Impact of international operations 0.2 0.6 (4.5 ) Domestic production deduction — — (1.5 ) Foreign derived intangible income (1.4 ) (1.2 ) — Equity-based compensation (1.1 ) (1.1 ) (2.6 ) Domestic tax credits (2.0 ) (1.1 ) (0.8 ) Contract close-outs — (0.5 ) — Adoption impact of enacted change in U.S. tax law — — 2.9 Other, net (0.3 ) (1.0 ) (0.5 ) Effective income tax rate 17.1 % 17.8 % 28.6 %
Schedule of Tax Effects Of Temporary Differences Between Reported Earnings And Taxable Earnings	The tax effects of temporary differences between reported earnings and taxable income consisted of the following: December 31 2019 2018 Retirement benefits $ 1,097 $ 1,055 Lease assets 418 — Tax loss and credit carryforwards 323 393 Salaries and wages 167 160 Workers’ compensation 148 138 Other 367 351 Deferred assets 2,520 2,097 Valuation allowances (291 ) (336 ) Net deferred assets $ 2,229 $ 1,761 Intangible assets $ (1,070 ) $ (1,061 ) Lease liabilities (418 ) — Contract accounting methods (375 ) (530 ) Property, plant and equipment (291 ) (265 ) Capital Construction Fund qualified ships (164 ) (160 ) Other (359 ) (284 ) Deferred liabilities $ (2,677 ) $ (2,300 ) Net deferred tax liability $ (448 ) $ (539 )
Schedule of Net Deferred Tax Asset (Liability)	Our net deferred tax liability consisted of the following: December 31 2019 2018 Deferred tax asset $ 33 $ 38 Deferred tax liability (481 ) (577 ) Net deferred tax liability $ (448 ) $ (539 )

Accounts Receivable (Tables)

Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2019
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Schedule of Accounts Receivable	Accounts receivable consisted of the following: December 31 2019 2018 Non-U.S. government $ 1,847 $ 2,035 U.S. government 1,076 1,189 Commercial 621 535 Total accounts receivable $ 3,544 $ 3,759

Unbilled Receivables (Tables)

Unbilled Receivables (Tables)	12 Months Ended
	Dec. 31, 2019
Contractors [Abstract]
Schedule of Unbilled Receivables	Unbilled receivables consisted of the following: December 31 2019 2018 Unbilled revenue $ 33,481 $ 27,908 Advances and progress billings (25,624 ) (21,332 ) Net unbilled receivables $ 7,857 $ 6,576

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following: December 31 2019 2018 Work in process $ 4,419 $ 4,357 Raw materials 1,733 1,504 Finished goods 30 33 Pre-owned aircraft 124 83 Total inventories $ 6,306 $ 5,977

Property, Plant And Equipment_2

Property, Plant And Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant And Equipment, Net	PP&E by major asset class consisted of the following: December 31 2019 2018 Machinery and equipment $ 5,441 $ 5,152 Buildings and improvements 3,232 2,962 Land and improvements 400 386 Construction in process 688 472 Total PP&E 9,761 8,972 Accumulated depreciation (5,286 ) (4,994 ) PP&E, net $ 4,475 $ 3,978

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Debt	Debt consisted of the following: December 31 2019 2018 Fixed-rate notes due: Interest rate: May 2020 2.875% $ 2,000 $ 2,000 May 2021 3.000% 2,000 2,000 July 2021 3.875% 500 500 November 2022 2.250% 1,000 1,000 May 2023 3.375% 750 750 August 2023 1.875% 500 500 November 2024 2.375% 500 500 May 2025 3.500% 750 750 August 2026 2.125% 500 500 November 2027 2.625% 500 500 May 2028 3.750% 1,000 1,000 November 2042 3.600% 500 500 Floating-rate notes due: May 2020 3-month LIBOR + 0.29% 500 500 May 2021 3-month LIBOR + 0.38% 500 500 Commercial paper 2.568% at December 31, 2018 — 850 Other Various 505 168 Total debt principal 12,005 12,518 Less unamortized debt issuance costs and discounts 75 101 Total debt 11,930 12,417 Less current portion 2,920 973 Long-term debt $ 9,010 $ 11,444
Schedule of Principal Maturities of Debt	The aggregate amounts of scheduled principal maturities of our debt are as follows: Year Ended December 31 Debt Principal 2020 $ 2,922 2021 3,009 2022 1,009 2023 1,255 2024 505 Thereafter 3,305 Total debt principal $ 12,005

Other Liabilities (Tables)

Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Schedule of Significant Other Liabilities By Balance Sheet Caption	A summary of significant other liabilities by balance sheet caption follows: December 31 2019 2018 Salaries and wages $ 941 $ 952 Workers’ compensation 306 244 Retirement benefits 296 272 Operating lease liabilities 252 — Fair value of cash flow hedges 32 141 Other (a) 1,744 1,708 Total other current liabilities $ 3,571 $ 3,317 Retirement benefits $ 5,172 $ 4,422 Operating lease liabilities 1,251 — Customer deposits on commercial contracts 709 726 Deferred income taxes 481 577 Other (b) 1,840 1,768 Total other liabilities $ 9,453 $ 7,493 (a) Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace segment, liabilities of discontinued operations, finance lease liabilities and insurance-related costs. (b) Consists primarily of warranty reserves, workers’ compensation liabilities, finance lease liabilities and liabilities of discontinued operations.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Schedule of Accumulated Other Comprehensive Income	The changes, pretax and net of tax, in each component of AOCL consisted of the following: Losses on Cash Flow Hedges Unrealized Gains on Marketable Securities Foreign Currency Translation Adjustments Changes in Retirement Plans’ Funded Status AOCL December 31, 2016 $ (345 ) $ 14 $ 69 $ (3,125 ) $ (3,387 ) Other comprehensive income, pretax 341 9 348 20 718 Provision for income tax, net (90 ) (4 ) (15 ) (42 ) (151 ) Other comprehensive income, net of tax 251 5 333 (22 ) 567 December 31, 2017 (94 ) 19 402 (3,147 ) (2,820 ) Cumulative-effect adjustments* (4 ) (19 ) — (615 ) (638 ) Other comprehensive loss, pretax 36 — (300 ) (61 ) (325 ) Benefit from income tax, net (9 ) — — 14 5 Other comprehensive loss, net of tax 27 — (300 ) (47 ) (320 ) December 31, 2018 (71 ) — 102 (3,809 ) (3,778 ) Other comprehensive loss, pretax 97 — 186 (886 ) (603 ) Benefit from income tax, net (24 ) — — 186 162 Other comprehensive loss, net of tax 73 — 186 (700 ) (441 ) December 31, 2019 $ 2 $ — $ 288 $ (4,509 ) $ (4,219 ) * Reflects the cumulative effects of ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which we adopted on January 1, 2018.

Commitments And Contingencies (

Commitments And Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Changes In Carrying Amount Of Warranty Liabilities	The changes in the carrying amount of warranty liabilities for each of the past three years were as follows: Year Ended December 31 2019 2018 2017 Beginning balance $ 480 $ 467 $ 474 Warranty expense 258 129 146 Payments (105 ) (102 ) (123 ) Adjustments (14 ) (14 ) (30 ) Ending balance $ 619 $ 480 $ 467

Equity Compensation Plans (Tabl

Equity Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Equity-Based Compensation Expense	The following table details the components of equity-based compensation expense recognized in net earnings in each of the past three years: Year Ended December 31 2019 2018 2017 Stock options $ 43 $ 45 $ 34 Restricted stock/RSUs 62 65 46 Total equity-based compensation expense, net of tax $ 105 $ 110 $ 80
Schedule of Assumptions Of Fair Value Options On The Date Of Grant Using Black-Scholes Option Pricing Model	We estimate the fair value of stock options on the date of grant using the Black-Scholes option pricing model with the following assumptions for each of the past three years: Year Ended December 31 2019 2018 2017 Expected volatility 19.7-20.0% 17.6-18.2% 17.3-19.4% Weighted average expected volatility 19.7 % 17.6 % 19.4 % Expected term (in months) 64 68 68 Risk-free interest rate 1.7-2.6% 2.6-2.9% 2.0-2.2% Expected dividend yield 2.0 % 1.8 % 1.8 %
Schedule of Stock Option Activity	A summary of stock option activity during 2019 follows: In Shares and Dollars Shares Under Option Weighted Average Exercise Price Per Share Outstanding on December 31, 2018 10,765,195 $ 143.43 Granted 2,115,740 167.92 Exercised (2,757,815 ) 91.34 Forfeited/canceled (355,371 ) 195.59 Outstanding on December 31, 2019 9,767,749 $ 161.54 Vested and expected to vest on December 31, 2019 9,538,150 $ 161.10 Exercisable on December 31, 2019 5,484,562 $ 137.92
Schedule of Stock Options' Intrinsic Value And Remaining Contractual Term	Summary information with respect to our stock options’ intrinsic value and remaining contractual term on December 31, 2019 , follows: Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding 6.4 $ 242 Vested and expected to vest 6.4 241 Exercisable 4.8 225
Schedule of Restricted Stock And Restricted Stock Unit Activity	A summary of restricted stock and RSU activity during 2019 follows: In Shares and Dollars Shares/ Share-Equivalent Units Weighted Average Grant-Date Fair Value Per Share Nonvested at December 31, 2018 1,262,276 $ 171.62 Granted 556,922 161.43 Vested (541,997 ) 138.73 Forfeited (52,837 ) 183.81 Nonvested at December 31, 2019 1,224,364 $ 181.11

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Schedule of Components of Lease Costs and Additional Information Related to Leases	The components of lease costs were as follows: Year Ended December 31 2019 Finance lease cost: Amortization of right-of-use assets $ 86 Interest on lease liabilities 24 Operating lease cost 332 Short-term lease cost 75 Variable lease cost 14 Sublease income (13 ) Total lease costs, net $ 518 As we have not restated prior-year information for our adoption of ASC Topic 842, total operating lease expense under ASC Topic 840 was $380 in 2018 and $309 in 2017. Additional information related to leases was as follows: Year Ended December 31 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 325 Operating cash flows from finance leases 24 Financing cash flows from finance leases 57 Right-of-use assets obtained in exchange for lease liabilities: Operating leases 365 Finance leases 50 Additional quantitative lease information was as follows: December 31 2019 Weighted-average remaining lease term: Operating leases 10.7 years Finance leases 6.1 years Weighted-average discount rate: Operating leases 3 % Finance leases 8 %
Schedule of Future Minimum Lease Payments for Operating Leases Under ASC 842 Guidance	The following is a reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets, presented on the Consolidated Balance Sheet on December 31, 2019 : Year Ended December 31 Operating Leases Finance Leases 2020 $ 302 $ 91 2021 261 83 2022 212 83 2023 163 36 2024 136 19 Thereafter 790 131 Total future lease payments 1,864 443 Less imputed interest 361 89 Present value of future lease payments 1,503 354 Less current portion of lease liabilities 252 67 Long-term lease liabilities $ 1,251 $ 287 ROU assets $ 1,432 $ 391
Schedule of Future Minimum Lease Payments for Finance Leases Under ASC 842 Guidance	The following is a reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets, presented on the Consolidated Balance Sheet on December 31, 2019 : Year Ended December 31 Operating Leases Finance Leases 2020 $ 302 $ 91 2021 261 83 2022 212 83 2023 163 36 2024 136 19 Thereafter 790 131 Total future lease payments 1,864 443 Less imputed interest 361 89 Present value of future lease payments 1,503 354 Less current portion of lease liabilities 252 67 Long-term lease liabilities $ 1,251 $ 287 ROU assets $ 1,432 $ 391
Schedule of Future Minimum Lease Payments for Operating Leases Under ASC 840 Guidance	As we have not restated prior-year information for our adoption of ASC Topic 842, the following presents our future minimum lease payments for operating leases and capital leases under ASC Topic 840 on December 31, 2018 : Year Ended December 31 Operating Leases Capital Leases 2019 $ 297 $ 92 2020 234 84 2021 196 78 2022 154 79 2023 110 30 Thereafter 698 70 Total future minimum lease payments $ 1,689 433 Less amount representing interest * 95 Less amount representing executory costs * 19 Present value of net minimum lease payments * 319 Less current maturities of capital lease liabilities * 64 Noncurrent capital lease liabilities * $ 255 * Not applicable for operating leases.
Schedule of Future Minimum Lease Payments for Capital Leases Under ASC 840 Guidance	As we have not restated prior-year information for our adoption of ASC Topic 842, the following presents our future minimum lease payments for operating leases and capital leases under ASC Topic 840 on December 31, 2018 : Year Ended December 31 Operating Leases Capital Leases 2019 $ 297 $ 92 2020 234 84 2021 196 78 2022 154 79 2023 110 30 Thereafter 698 70 Total future minimum lease payments $ 1,689 433 Less amount representing interest * 95 Less amount representing executory costs * 19 Present value of net minimum lease payments * 319 Less current maturities of capital lease liabilities * 64 Noncurrent capital lease liabilities * $ 255 * Not applicable for operating leases.

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Schedule of Benefits To Be Paid From Retirement Plans Over The Next Ten Years	We expect the following benefits to be paid from our retirement plans over the next 10 years: Pension Benefits Other Post-retirement 2020 $ 853 $ 66 2021 880 65 2022 905 64 2023 929 63 2024 957 62 2025-2029 5,020 286
Schedule of Annual Pension and Other Post-retirement Benefit Costs	Net annual defined-benefit pension and other post-retirement benefit cost (credit) consisted of the following: Pension Benefits Year Ended December 31 2019 2018 2017 Service cost $ 111 $ 180 $ 168 Interest cost 600 532 453 Expected return on plan assets (911 ) (856 ) (679 ) Recognized net actuarial loss 326 359 362 Amortization of prior service credit (19 ) (46 ) (66 ) Net annual benefit cost $ 107 $ 169 $ 238 Other Post-retirement Benefits Year Ended December 31 2019 2018 2017 Service cost $ 8 $ 10 $ 9 Interest cost 35 33 30 Expected return on plan assets (36 ) (40 ) (34 ) Recognized net actuarial gain (8 ) (4 ) (4 ) Amortization of prior service credit (3 ) (4 ) (3 ) Net annual benefit credit $ (4 ) $ (5 ) $ (2 )
Schedule of Reconciliation of Benefit Obligations And Plan or Trust Assets And Resulting Funded Status Of Defined Benefit Retirement Plans	The following is a reconciliation of the benefit obligations and plan/trust assets, and the resulting funded status, of our defined-benefit retirement plans: Pension Benefits Other Post-retirement Benefits Year Ended December 31 2019 2018 2019 2018 Change in Benefit Obligation Benefit obligation at beginning of year $ (15,720 ) $ (14,212 ) $ (935 ) $ (996 ) Service cost (111 ) (180 ) (8 ) (10 ) Interest cost (600 ) (532 ) (35 ) (33 ) Acquisitions — (2,758 ) — (62 ) Amendments (3 ) 15 (8 ) — Actuarial (loss) gain (2,446 ) 1,183 (101 ) 78 Settlement/curtailment/other (33 ) 23 (4 ) 21 Benefits paid 806 741 64 67 Benefit obligation at end of year $ (18,107 ) $ (15,720 ) $ (1,027 ) $ (935 ) Change in Plan/Trust Assets Fair value of assets at beginning of year $ 11,532 $ 10,130 $ 570 $ 541 Actual return on plan assets 2,206 (749 ) 117 (4 ) Acquisitions — 2,328 — 77 Employer contributions 185 571 2 1 Settlement/curtailment/other 39 (26 ) — — Benefits paid (785 ) (722 ) (45 ) (45 ) Fair value of assets at end of year $ 13,177 $ 11,532 $ 644 $ 570 Funded status at end of year $ (4,930 ) $ (4,188 ) $ (383 ) $ (365 )
Schedule of Amounts Recognized On Consolidated Balance Sheet	Amounts recognized on the Consolidated Balance Sheet consisted of the following: Pension Benefits Other Post-retirement Benefits December 31 2019 2018 2019 2018 Noncurrent assets $ 61 $ 67 $ 94 $ 74 Current liabilities (166 ) (131 ) (130 ) (141 ) Noncurrent liabilities (4,825 ) (4,124 ) (347 ) (298 ) Net liability recognized $ (4,930 ) $ (4,188 ) $ (383 ) $ (365 )
Schedule of Amounts Deferred In AOCI	Amounts deferred in AOCL for our retirement plans consisted of the following: Pension Benefits Other Post-retirement Benefits December 31 2019 2018 2019 2018 Net actuarial loss (gain) $ 5,784 $ 4,959 $ (9 ) $ (37 ) Prior service (credit) cost (73 ) (95 ) 12 1 Total amount recognized in AOCL, pretax $ 5,711 $ 4,864 $ 3 $ (36 ) The following is a reconciliation of the change in AOCL for our retirement plans: Pension Benefits Other Post-retirement Benefits Year Ended December 31 2019 2018 2019 2018 Net actuarial loss (gain) $ 1,151 $ 422 $ 20 $ (34 ) Prior service credit (cost) 3 (15 ) 8 — Amortization of: Net actuarial (loss) gain from prior years (326 ) (359 ) 8 4 Prior service credit 19 46 3 4 Other* — (5 ) — (2 ) Change in AOCL, pretax $ 847 $ 89 $ 39 $ (28 ) * Includes foreign exchange translation, curtailment and other adjustments.
Schedule of PBO That Exceeded The Plans' Assets	On December 31, 2019 and 2018 , most of our pension plans had a PBO that exceeded the plans’ assets. Summary information for those plans follows: December 31 2019 2018 PBO $ (17,651 ) $ (15,354 ) Fair value of plan assets 12,673 11,116
Schedule of ABO That Exceeded The Plans' Assets	On December 31, 2019 and 2018 , most of our retirement plans had an ABO that exceeded the plans’ assets. Summary information for those plans follows: Pension Benefits Other Post-retirement Benefits December 31 2019 2018 2019 2018 ABO $ (17,080 ) $ (14,856 ) $ (783 ) $ (709 ) Fair value of plan assets 12,354 10,832 301 264
Schedule of Assumptions Used To Determine Benefit Obligations And Benefit Costs	The following table summarizes the weighted average assumptions used to determine our net annual benefit cost: Assumptions for Year Ended December 31 2019 2018 2017 Pension Benefits Discount rates: Benefit obligation 4.28 % 3.69 % 4.19 % Service cost 3.81 % 3.51 % 4.13 % Interest cost 3.92 % 3.34 % 3.56 % Expected long-term rate of return on assets 7.46 % 7.45 % 7.43 % Rate of increase in compensation levels 2.77 % 2.79 % 2.90 % Other Post-retirement Benefits Discount rates: Benefit obligation 4.24 % 3.64 % 4.11 % Service cost 4.23 % 3.79 % 4.34 % Interest cost 3.88 % 3.27 % 3.43 % Expected long-term rate of return on assets 6.84 % 7.75 % 7.76 % The following table summarizes the weighted average assumptions used to determine our benefit obligations: Assumptions on December 31 2019 2018 Pension Benefits Benefit obligation discount rate 3.19 % 4.28 % Rate of increase in compensation levels 2.68 % 2.79 % Other Post-retirement Benefits Benefit obligation discount rate 3.18 % 4.24 % Healthcare cost trend rate: Trend rate for next year 6.00 % 6.50 % Ultimate trend rate 5.00 % 5.00 % Year rate reaches ultimate trend rate 2024 2024
Schedule of Asset Allocation Policy Ranges	At the end of 2019 , our asset allocation policy ranges were: Equities 48-68% Fixed income 20-48% Cash 0-5% Other asset classes 0-16%
Schedule of Fair Value of Plan Assets By Investment Category And The Corresponding Level Within The Fair Value Hierarchy	The fair value of our other post-retirement benefit plan assets by category and the corresponding level within the fair value hierarchy were as follows: Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Asset Category (a) December 31, 2019 Cash and equivalents $ 18 $ — $ 18 Equity securities 92 92 — Fixed-income securities 122 — 122 Commingled funds: Equity funds 288 — 288 Fixed-income funds 113 — 113 Real estate funds 2 2 — Total plan assets in fair value hierarchy $ 635 $ 94 $ 541 Plan assets measured using NAV as a practical expedient (b): Real estate funds 5 Hedge funds 4 Total other post-retirement benefit plan assets $ 644 (a) We had no Level 3 investments on December 31, 2019 . (b) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Asset Category (a) December 31, 2018 Cash and equivalents $ 23 $ — $ 23 Equity securities 80 80 — Fixed-income securities 87 — 87 Commingled funds: Equity funds 237 — 237 Fixed-income funds 111 — 111 Real estate funds 2 2 — Total plan assets in fair value hierarchy $ 540 $ 82 $ 458 Plan assets measured using NAV as a practical expedient (b): Hedge funds 22 Equity funds 3 Fixed-income funds 3 Real estate funds 2 Total other post-retirement benefit plan assets $ 570 (a) We had no Level 3 investments on December 31, 2018 . (b) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. The fair value of our pension plan assets by investment category and the corresponding level within the fair value hierarchy were as follows: Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category December 31, 2019 Cash and equivalents $ 56 $ — $ 56 $ — Equity securities (a): U.S. companies 958 958 — — Non-U.S. companies 128 128 — — Private equity investments 26 — — 26 Fixed-income securities: Corporate bonds (b) 2,163 — 2,163 — Treasury securities 1,855 — 1,855 — Commingled funds: Equity funds 6,494 — 6,494 — Fixed-income funds 365 — 365 — Real estate funds 84 — — 84 Other investments: Insurance deposit contracts 137 — — 137 Retirement annuity contracts 35 — — 35 Total plan assets in fair value hierarchy $ 12,301 $ 1,086 $ 10,933 $ 282 Plan assets measured using NAV as a practical expedient (c): Real estate funds 443 Hedge funds 419 Equity funds 14 Total pension plan assets $ 13,177 (a) No single equity holding amounted to more than 1% of the total fair value. (b) Our corporate bond investments had an average rating of A . (c) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Asset Category December 31, 2018 Cash and equivalents $ 73 $ — $ 73 $ — Equity securities (a): U.S. companies 732 732 — — Non-U.S. companies 117 117 — — Private equity investments 20 — — 20 Fixed-income securities: Corporate bonds (b) 1,600 — 1,600 — Treasury securities 1,410 — 1,410 — Commingled funds: Equity funds 5,243 — 5,243 — Fixed-income funds 624 — 624 — Real estate funds 68 — — 68 Other investments: Insurance deposit contracts 128 — — 128 Total plan assets in fair value hierarchy $ 10,015 $ 849 $ 8,950 $ 216 Plan assets measured using NAV as a practical expedient (c): Hedge funds 910 Real estate funds 420 Fixed-income funds 101 Equity funds 86 Total pension plan assets $ 11,532 (a) No single equity holding amounted to more than 1% of the total fair value. (b) Our corporate bond investments had an average rating of A+ . (c) Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets.
Schedule of Changes In Level 3 Retirement Plan Assets	Changes in our Level 3 retirement plan assets during 2019 and 2018 were as follows: Private Equity Investments Real Estate Funds Insurance Deposits Contracts Retirement Annuity Contracts Total Level 3 Assets December 31, 2017 $ 18 $ 51 $ 120 $ — $ 189 Actual return on plan assets: Unrealized losses, net — (1 ) — — (1 ) Realized gains, net — — 3 — 3 Purchases, sales and settlements, net 2 18 5 — 25 December 31, 2018 20 68 128 — 216 Actual return on plan assets: Unrealized gains, net 5 6 6 — 17 Purchases, sales and settlements, net 1 10 3 35 49 December 31, 2019 $ 26 $ 84 $ 137 $ 35 $ 282

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Schedule of Financial Information For Each Of Our Business Groups	The following is additional summary financial information for each of our segments: Identifiable Assets Capital Expenditures Depreciation and Amortization Year Ended December 31 2019 2018 2017 2019 2018 2017 2019 2018 2017 Aerospace $ 12,324 $ 11,220 $ 10,126 $ 138 $ 194 $ 132 $ 178 $ 154 $ 147 Combat Systems 11,220 9,853 9,846 109 91 84 85 87 86 Information Technology 14,248 14,159 3,021 147 62 16 377 333 32 Mission Systems 6,205 5,984 5,856 75 49 47 60 65 60 Marine Systems 3,918 3,130 2,906 449 243 123 122 116 109 Corporate* 926 1,062 3,291 69 51 26 7 8 7 Total $ 48,841 $ 45,408 $ 35,046 $ 987 $ 690 $ 428 $ 829 $ 763 $ 441 * Corporate identifiable assets are primarily cash and equivalents. Summary financial information for each of our segments follows: Revenue Operating Earnings Revenue from U.S. Government Year Ended December 31 2019 2018 2017 2019 2018 2017 2019 2018 2017 Aerospace $ 9,801 $ 8,455 $ 8,129 $ 1,532 $ 1,490 $ 1,577 $ 498 $ 334 $ 231 Combat Systems 7,007 6,241 5,949 996 962 937 4,048 3,228 3,084 Information Technology 8,422 8,269 4,410 628 608 373 8,240 8,025 4,164 Mission Systems 4,937 4,726 4,481 683 659 638 3,994 3,774 3,629 Marine Systems 9,183 8,502 8,004 785 761 685 9,027 8,245 7,913 Corporate — — — 24 (23 ) 26 — — — Total $ 39,350 $ 36,193 $ 30,973 $ 4,648 $ 4,457 $ 4,236 $ 25,807 $ 23,606 $ 19,021
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area	The following table presents our revenue by geographic area based on the location of our customers: Year Ended December 31 2019 2018 2017 North America: United States $ 31,982 $ 28,578 $ 23,519 Other 852 755 915 Total North America 32,834 29,333 24,434 Europe 2,808 2,772 2,558 Asia/Pacific 1,670 2,252 2,011 Africa/Middle East 1,739 1,565 1,655 South America 299 271 315 Total revenue $ 39,350 $ 36,193 $ 30,973

Condensed Consolidating Finan_2

Condensed Consolidating Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2019
Consolidating Financial Statements [Abstract]
Condensed Consolidating Statements of Earnings	CONDENSED CONSOLIDATING STATEMENT OF EARNINGS Year Ended December 31, 2019 Parent Guarantors on a Combined Basis Other Subsidiaries Consolidating Adjustments Total Consolidated Revenue $ — $ 30,566 $ 8,784 $ — $ 39,350 Cost of sales 99 (25,120 ) (7,270 ) — (32,291 ) G&A (75 ) (1,725 ) (611 ) — (2,411 ) Operating earnings 24 3,721 903 — 4,648 Interest, net (426 ) 1 (35 ) — (460 ) Other, net (60 ) 15 59 — 14 Earnings before income tax (462 ) 3,737 927 — 4,202 Provision for income tax, net 117 (626 ) (209 ) — (718 ) Equity in net earnings of subsidiaries 3,829 — — (3,829 ) — Net earnings $ 3,484 $ 3,111 $ 718 $ (3,829 ) $ 3,484 Comprehensive income $ 3,043 $ 3,083 $ 957 $ (4,040 ) $ 3,043 Year Ended December 31, 2018 Revenue $ — $ 28,132 $ 8,061 $ — $ 36,193 Cost of sales 67 (22,841 ) (6,704 ) — (29,478 ) G&A (90 ) (1,638 ) (530 ) — (2,258 ) Operating earnings (23 ) 3,653 827 — 4,457 Interest, net (326 ) — (30 ) — (356 ) Other, net (81 ) 12 53 — (16 ) Earnings before income tax (430 ) 3,665 850 — 4,085 Provision for income tax, net 116 (677 ) (166 ) — (727 ) Discontinued operations, net of tax (13 ) — — — (13 ) Equity in net earnings of subsidiaries 3,672 — — (3,672 ) — Net earnings $ 3,345 $ 2,988 $ 684 $ (3,672 ) $ 3,345 Comprehensive income $ 3,025 $ 2,992 $ 305 $ (3,297 ) $ 3,025 Year Ended December 31, 2017 Revenue $ — $ 26,933 $ 4,040 $ — $ 30,973 Cost of sales 76 (21,695 ) (3,112 ) — (24,731 ) G&A (48 ) (1,643 ) (315 ) — (2,006 ) Operating earnings 28 3,595 613 — 4,236 Interest, net (97 ) 1 (7 ) — (103 ) Other, net (72 ) 12 4 — (56 ) Earnings before income tax (141 ) 3,608 610 — 4,077 Provision for income tax, net 154 (1,262 ) (57 ) — (1,165 ) Equity in net earnings of subsidiaries 2,899 — — (2,899 ) — Net earnings $ 2,912 $ 2,346 $ 553 $ (2,899 ) $ 2,912 Comprehensive income $ 3,479 $ 2,336 $ 1,158 $ (3,494 ) $ 3,479
Condensed Consolidating Balance Sheet	CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2019 Parent* Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 601 $ — $ 301 $ — $ 902 Accounts receivable — 1,188 2,356 — 3,544 Unbilled receivables — 2,826 5,031 — 7,857 Inventories — 6,191 115 — 6,306 Other current assets (300 ) 989 482 — 1,171 Total current assets 301 11,194 8,285 — 19,780 Noncurrent assets: PP&E 346 7,741 1,674 — 9,761 Accumulated depreciation of PP&E (91 ) (4,260 ) (935 ) — (5,286 ) Intangible assets, net — 210 2,105 — 2,315 Goodwill — 7,960 11,717 — 19,677 Other assets 203 1,278 1,113 — 2,594 Net investment in subsidiaries 29,693 — — (29,693 ) — Total noncurrent assets 30,151 12,929 15,674 (29,693 ) 29,061 Total assets $ 30,452 $ 24,123 $ 23,959 $ (29,693 ) $ 48,841 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ 2,497 $ 2 $ 421 $ — $ 2,920 Customer advances and deposits — 4,174 2,974 — 7,148 Other current liabilities 487 4,391 1,855 — 6,733 Total current liabilities 2,984 8,567 5,250 — 16,801 Noncurrent liabilities: Long-term debt 8,928 67 15 — 9,010 Other liabilities 4,963 2,995 1,495 — 9,453 Total noncurrent liabilities 13,891 3,062 1,510 — 18,463 Total shareholders’ equity 13,577 12,494 17,199 (29,693 ) 13,577 Total liabilities and shareholders’ equity $ 30,452 $ 24,123 $ 23,959 $ (29,693 ) $ 48,841 * Includes the funded status of the company’s primary domestic qualified defined-benefit pension plans as the Parent has the ultimate obligation for the plans. CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2018 Parent* Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 460 $ — $ 503 $ — $ 963 Accounts receivable — 1,171 2,588 — 3,759 Unbilled receivables — 2,758 3,818 — 6,576 Inventories — 5,855 122 — 5,977 Other current assets (251 ) 647 518 — 914 Total current assets 209 10,431 7,549 — 18,189 Noncurrent assets: PP&E 273 7,177 1,522 — 8,972 Accumulated depreciation of PP&E (83 ) (4,071 ) (840 ) — (4,994 ) Intangible assets, net — 251 2,334 — 2,585 Goodwill — 8,031 11,563 — 19,594 Other assets 195 274 593 — 1,062 Net investment in subsidiaries 27,887 — — (27,887 ) — Total noncurrent assets 28,272 11,662 15,172 (27,887 ) 27,219 Total assets $ 28,481 $ 22,093 $ 22,721 $ (27,887 ) $ 45,408 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ 850 $ — $ 123 $ — $ 973 Customer advances and deposits — 4,541 2,729 — 7,270 Other current liabilities 552 3,944 2,000 — 6,496 Total current liabilities 1,402 8,485 4,852 — 14,739 Noncurrent liabilities: Long-term debt 11,398 39 7 — 11,444 Other liabilities 3,949 2,115 1,429 — 7,493 Total noncurrent liabilities 15,347 2,154 1,436 — 18,937 Total shareholders’ equity 11,732 11,454 16,433 (27,887 ) 11,732 Total liabilities and shareholders’ equity $ 28,481 $ 22,093 $ 22,721 $ (27,887 ) $ 45,408 * Includes the funded status of the company’s primary domestic qualified defined-benefit pension plans as the Parent has the ultimate obligation for the plans.
Condensed Consolidating Statements of Cash Flows	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Year Ended December 31, 2019 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Net cash provided by operating activities* $ (46 ) $ 2,918 $ 109 $ — $ 2,981 Cash flows from investing activities: Capital expenditures (68 ) (718 ) (201 ) — (987 ) Other, net 7 10 (24 ) — (7 ) Net cash used by investing activities (61 ) (708 ) (225 ) — (994 ) Cash flows from financing activities: Dividends paid (1,152 ) — — — (1,152 ) Repayments of commercial paper, net (850 ) — — — (850 ) Purchases of common stock (231 ) — — — (231 ) Other, net 24 (2 ) 214 — 236 Net cash used by financing activities (2,209 ) (2 ) 214 — (1,997 ) Net cash used by discontinued operations (51 ) — — — (51 ) Cash sweep/funding by parent 2,508 (2,208 ) (300 ) — — Net decrease in cash and equivalents 141 — (202 ) — (61 ) Cash and equivalents at beginning of year 460 — 503 — 963 Cash and equivalents at end of year $ 601 $ — $ 301 $ — $ 902 Year Ended December 31, 2018 Net cash provided by operating activities* $ (579 ) $ 2,954 $ 773 $ — $ 3,148 Cash flows from investing activities: Business acquisitions, net of cash acquired (9,749 ) (74 ) (276 ) — (10,099 ) Capital expenditures (51 ) (513 ) (126 ) — (690 ) Proceeds from sales of assets 90 472 — — 562 Other, net 4 (12 ) 1 — (7 ) Net cash used by investing activities (9,706 ) (127 ) (401 ) — (10,234 ) Cash flows from financing activities: Proceeds from fixed-rate notes 6,461 — — — 6,461 Purchases of common stock (1,769 ) — — — (1,769 ) Dividends paid (1,075 ) — — — (1,075 ) Proceeds from floating-rate notes 1,000 — — — 1,000 Proceeds from commercial paper, net 850 — — — 850 Repayment of CSRA accounts receivable purchase agreement — — (450 ) — (450 ) Other, net 3 35 31 — 69 Net cash provided by financing activities 5,470 35 (419 ) — 5,086 Net cash used by discontinued operations (20 ) — — — (20 ) Cash sweep/funding by parent 3,365 (2,862 ) (503 ) — — Net decrease in cash and equivalents (1,470 ) — (550 ) — (2,020 ) Cash and equivalents at beginning of year 1,930 — 1,053 — 2,983 Cash and equivalents at end of year $ 460 $ — $ 503 $ — $ 963 * Continuing operations only. CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS Year Ended December 31, 2017 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Net cash provided by operating activities* $ 312 $ 2,371 $ 1,193 $ — $ 3,876 Cash flows from investing activities: Capital expenditures (26 ) (330 ) (72 ) — (428 ) Business acquisitions, net of cash acquired — (350 ) (49 ) — (399 ) Other, net 10 31 (2 ) — 39 Net cash used by investing activities (16 ) (649 ) (123 ) — (788 ) Cash flows from financing activities: Purchases of common stock (1,558 ) — — — (1,558 ) Dividends paid (986 ) — — — (986 ) Proceeds from fixed-rate notes 985 — — — 985 Repayment of fixed-rate notes (900 ) — — — (900 ) Other, net 63 (3 ) — — 60 Net cash used by financing activities (2,396 ) (3 ) — — (2,399 ) Net cash used by discontinued operations (40 ) — — — (40 ) Cash sweep/funding by parent 2,816 (1,719 ) (1,097 ) — — Net increase in cash and equivalents 676 — (27 ) — 649 Cash and equivalents at beginning of year 1,254 — 1,080 — 2,334 Cash and equivalents at end of year $ 1,930 $ — $ 1,053 $ — $ 2,983 * Continuing operations only.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	May 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Discontinued operations, net of tax	$ 0	$ 13,000,000	$ 0
Trading securities	0	0
Other contract costs	144,000,000	135,000,000
Operating lease liability	1,503,000,000
ROU assets	1,432,000,000
Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt issued					$ 7,500,000,000
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liability				$ 1,400,000,000
ROU assets				$ 1,400,000,000
Company-sponsored R & D, including product development costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Research and development expense	466,000,000	$ 502,000,000	$ 521,000,000
Discontinued Operations, Disposed of by Sale
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Discontinued operations, net of tax	13,000,000
Information Technology
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment of reporting unit	$ 0
Fair value of reporting unit in excess of carrying amount	25.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Net Interest) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Interest expense	$ 472	$ 374	$ 117
Interest income	(12)	(18)	(14)
Interest expense, net	$ 460	$ 356	$ 103

Acquisitions and Divestitures_3

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Narrative) (Details) $ / shares in Units, $ in Millions	Apr. 03, 2018USD ($)$ / shares	Sep. 29, 2019business	Dec. 31, 2019USD ($)business	Dec. 31, 2018USD ($)business	Dec. 31, 2017USD ($)business
Business Acquisition [Line Items]
Amortization of intangible and finance lease right-of-use assets | $			$ 277	$ 270	$ 79
Information Technology
Business Acquisition [Line Items]
Number of businesses sold				3
CSRA
Business Acquisition [Line Items]
Total purchase price | $	$ 9,700
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Total purchase price | $			$ 20	$ 400	$ 400
Number of businesses acquired				5	4
Series of Individually Immaterial Business Acquisitions | Aerospace
Business Acquisition [Line Items]
Number of businesses acquired			2	2
Series of Individually Immaterial Business Acquisitions | Mission Systems
Business Acquisition [Line Items]
Number of businesses acquired		1
Common Stock | CSRA
Business Acquisition [Line Items]
Percentage of interest acquired	100.00%
Cash acquisition price (in dollars per share) | $ / shares	$ 41.25

Acquisitions and Divestitures_4

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Fair Value of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Apr. 03, 2018	Apr. 01, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 19,677	$ 19,594		$ 11,955	$ 11,914
CSRA
Business Acquisition [Line Items]
Cash and equivalents			$ 45
Accounts receivable			155
Unbilled receivables			415
Other current assets			303
Property, plant and equipment, net			326
Intangible assets, net			2,066
Goodwill			7,935
Other noncurrent assets			369
Total assets			11,614
Accounts payable			(135)
Customer advances and deposits			(151)
Current lease obligation			(51)
Other current liabilities			(434)
Noncurrent lease obligation			(207)
Noncurrent deferred tax liability			(355)
Other noncurrent liabilities			(532)
Total liabilities			(1,865)
Net assets acquired			$ 9,749

Acquisitions and Divestitures_5

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Pro Forma Information) (Details) - CSRA - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Revenue	$ 37,534	$ 35,828
Earnings from continuing operations	$ 3,390	$ 2,982
Diluted earnings per share from continuing operations	$ 11.33	$ 9.79

Acquisitions and Divestitures_6

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Changes In Goodwill) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
		Apr. 01, 2018		Dec. 31, 2018		Dec. 31, 2019		Mar. 31, 2019	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning of period		$ 11,914		$ 11,955		$ 19,594
Acquisitions/divestitures		16	[1]	7,821	[1]	101
Other		25	[2]	(182)	[2]	(18)
Change in reporting unit composition				0
Goodwill, end of period		11,955		19,594		19,677
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period		2,638		2,678	[3]	2,813	[3]
Acquisitions/divestitures	[1]	0		183		3
Other	[2]	40		(48)		15
Change in reporting unit composition	[4]			0
Goodwill, end of period		2,678	[3]	2,813	[3]	2,831	[5]
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period		2,677		2,663	[3]	2,633	[3]
Acquisitions/divestitures	[1]	0		30		15
Other	[2]	(14)		(60)		33
Change in reporting unit composition	[4]			0
Goodwill, end of period		2,663	[3]	2,633	[3]	2,681	[5]
Information Systems and Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	[3]	6,302		6,317		0
Acquisitions/divestitures	[1]	16		0		0
Other	[2]	(1)		0		0
Change in reporting unit composition	[4]			(6,317)
Goodwill, end of period		6,317	[3]	0	[3]	0	[5]
Accumulated impairment loss				1,900				$ 1,900	$ 1,900
Information Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	[3]	0		0		9,622
Acquisitions/divestitures	[1]	0		7,601		77
Other	[2]	0		(55)		1
Change in reporting unit composition	[4]			2,076
Goodwill, end of period		0	[3]	9,622	[3]	9,700	[5]
Accumulated impairment loss						536
Mission Systems
Goodwill [Roll Forward]
Goodwill, beginning of period		0		0	[3]	4,229	[3]
Acquisitions/divestitures	[1]	0		7		6
Other	[2]	0		(19)		(67)
Change in reporting unit composition	[4]			4,241
Goodwill, end of period		0	[3]	4,229	[3]	4,168	[5]
Accumulated impairment loss						1,300
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period		297		297	[3]	297	[3]
Acquisitions/divestitures	[1]	0		0		0
Other	[2]	0		0		0
Change in reporting unit composition	[4]			0
Goodwill, end of period		$ 297	[3]	$ 297	[3]	$ 297	[5]
[1]	Includes adjustments during the purchase price allocation period. Activity in the first quarter of 2018 and the nine-month period ended December 31, 2018 , also includes an allocation of goodwill associated with the sale of the commercial health products business and an allocation of goodwill associated with the sale of a public-facing contact-center business, respectively, as discussed above.
[2]	Consists primarily of adjustments for foreign currency translation. Activity in the nine-month period ended December 31, 2018, also includes an allocation of goodwill in our Information Technology reporting unit associated with certain operations classified as held for sale on the Consolidated Balance Sheet on December 31, 2018. Activity in 2019 also includes an allocation of goodwill in our Mission Systems reporting unit associated with a non-core operation classified as held for sale on the Consolidated Balance Sheet on December 31, 2019 .
[3]	Goodwill in the Information Systems and Technology reporting unit is net of $1.9 billion of accumulated impairment losses.
[4]	Concurrent with the acquisition of CSRA, we reorganized our Information Systems and Technology operating segment, in accordance with the nature of the segment’s products and services, into the Information Technology and Mission Systems segments. This reorganization similarly changed the composition of our reporting units. Accordingly, goodwill of the Information Systems and Technology reporting unit was reassigned to the Information Technology and Mission Systems reporting units using a relative fair value allocation approach as of the date of the reorganization
[5]	Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively.

Acquisitions and Divestitures_7

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[1]	$ 4,573	$ 4,564
Accumulated Amortization		(2,258)	(1,979)
Net Carrying Amount		2,315	2,585
Contract and Program Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[1],[2]	3,776	3,771
Accumulated Amortization	[2]	(1,779)	(1,531)
Net Carrying Amount		1,997	2,240
Tradenames and Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[1]	474	469
Accumulated Amortization		(195)	(177)
Net Carrying Amount		279	292
Technology and Software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[1]	164	165
Accumulated Amortization		(126)	(116)
Net Carrying Amount		38	49
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	[1]	159	159
Accumulated Amortization		(158)	(155)
Net Carrying Amount		$ 1	$ 4
[1]	Change in gross carrying amounts consists primarily of adjustments for acquired intangible assets and foreign currency translation.
[2]	Consists of acquired backlog and probable follow-on work and associated customer relationships.

Acquisitions and Divestitures_8

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Amortization Life of Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2019
Contract and Program Intangible Assets | Minimum
Finite-Lived Intangible Assets [Line Items]
Range of Amortization Life	7 years
Contract and Program Intangible Assets | Maximum
Finite-Lived Intangible Assets [Line Items]
Range of Amortization Life	30 years
Tradenames and Trademarks
Finite-Lived Intangible Assets [Line Items]
Range of Amortization Life	30 years
Technology and Software | Minimum
Finite-Lived Intangible Assets [Line Items]
Range of Amortization Life	5 years
Technology and Software | Maximum
Finite-Lived Intangible Assets [Line Items]
Range of Amortization Life	15 years
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Range of Amortization Life	7 years

Acquisitions and Divestitures_9

Acquisitions and Divestitures, Goodwill, and Intangible Assets (Amortization Expense of Intangible Assets) (Details) $ in Millions	Dec. 31, 2019USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020	$ 264
2021	220
2022	192
2023	177
2024	$ 164

Revenue (Additional Information

Revenue (Additional Information) (Details) contract in Thousands, $ in Billions	12 Months Ended
	Dec. 31, 2019USD ($)contract	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Number of active contracts | contract	11
Revenue recognized in contract liability | $	$ 4.5	$ 4.3	$ 4.3
Transferred over Time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, percentage from products and services transferred to customers	73.00%	74.00%	71.00%
Transferred at Point in Time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, percentage from products and services transferred to customers	27.00%	26.00%	29.00%

Revenue (Remaining Performance

Revenue (Remaining Performance Obligations to be Recognized as Revenue) (Details) $ in Billions	Dec. 31, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total backlog	$ 86.9
Revenue, remaining performance obligation, percentage recognized	35.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation, percentage recognized	35.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	2 years

Revenue (Impact of Adjustments

Revenue (Impact of Adjustments in Contract Estimates) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 39,350	$ 36,193	$ 30,973
Operating earnings	$ 4,648	$ 4,457	$ 4,236
Diluted earnings per share	$ 11.98	$ 11.18	$ 9.56
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 342	$ 377	$ 292
Operating earnings	$ 271	$ 345	$ 323
Diluted earnings per share	$ 0.74	$ 0.91	$ 0.69

Revenue (Revenue by Major Produ

Revenue (Revenue by Major Products and Services) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from External Customer [Line Items]
Revenue	$ 39,350	$ 36,193	$ 30,973
Aerospace
Revenue from External Customer [Line Items]
Revenue	9,801	8,455	8,129
Aerospace | Aircraft manufacturing and completions
Revenue from External Customer [Line Items]
Revenue	7,355	6,226	6,320
Aerospace | Aircraft services
Revenue from External Customer [Line Items]
Revenue	2,154	2,096	1,743
Aerospace | Pre-owned aircraft
Revenue from External Customer [Line Items]
Revenue	292	133	66
Combat Systems
Revenue from External Customer [Line Items]
Revenue	7,007	6,241	5,949
Combat Systems | Military vehicles
Revenue from External Customer [Line Items]
Revenue	4,620	4,027	3,731
Combat Systems | Weapons, armament and munitions
Revenue from External Customer [Line Items]
Revenue	1,906	1,798	1,633
Combat Systems | Engineering and other services
Revenue from External Customer [Line Items]
Revenue	481	416	585
Information Technology
Revenue from External Customer [Line Items]
Revenue	8,422	8,269	4,410
Information Technology | Information technology services
Revenue from External Customer [Line Items]
Revenue	8,422	8,269	4,410
Mission Systems
Revenue from External Customer [Line Items]
Revenue	4,937	4,726	4,481
Mission Systems | C4ISR solutions
Revenue from External Customer [Line Items]
Revenue	4,937	4,726	4,481
Marine Systems
Revenue from External Customer [Line Items]
Revenue	9,183	8,502	8,004
Marine Systems | Nuclear-powered submarines
Revenue from External Customer [Line Items]
Revenue	6,254	5,712	5,175
Marine Systems | Surface ships
Revenue from External Customer [Line Items]
Revenue	1,912	1,872	1,607
Marine Systems | Repair and other services
Revenue from External Customer [Line Items]
Revenue	$ 1,017	$ 918	$ 1,222

Revenue (Revenue by Contract Ty

Revenue (Revenue by Contract Type) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Revenue	$ 39,350	$ 36,193	$ 30,973
Aerospace
Revenue, Major Customer [Line Items]
Revenue	9,801	8,455	8,129
Combat Systems
Revenue, Major Customer [Line Items]
Revenue	7,007	6,241	5,949
Information Technology
Revenue, Major Customer [Line Items]
Revenue	8,422	8,269	4,410
Mission Systems
Revenue, Major Customer [Line Items]
Revenue	4,937	4,726	4,481
Marine Systems
Revenue, Major Customer [Line Items]
Revenue	9,183	8,502	8,004
Fixed-price
Revenue, Major Customer [Line Items]
Revenue	27,673	24,606	21,320
Fixed-price | Aerospace
Revenue, Major Customer [Line Items]
Revenue	8,949	7,600	7,479
Fixed-price | Combat Systems
Revenue, Major Customer [Line Items]
Revenue	6,049	5,406	5,090
Fixed-price | Information Technology
Revenue, Major Customer [Line Items]
Revenue	3,436	3,396	1,465
Fixed-price | Mission Systems
Revenue, Major Customer [Line Items]
Revenue	2,908	2,711	2,478
Fixed-price | Marine Systems
Revenue, Major Customer [Line Items]
Revenue	6,331	5,493	4,808
Cost-reimbursement
Revenue, Major Customer [Line Items]
Revenue	8,996	9,087	8,152
Cost-reimbursement | Aerospace
Revenue, Major Customer [Line Items]
Revenue	0	0	0
Cost-reimbursement | Combat Systems
Revenue, Major Customer [Line Items]
Revenue	894	800	823
Cost-reimbursement | Information Technology
Revenue, Major Customer [Line Items]
Revenue	3,401	3,422	2,305
Cost-reimbursement | Mission Systems
Revenue, Major Customer [Line Items]
Revenue	1,862	1,861	1,838
Cost-reimbursement | Marine Systems
Revenue, Major Customer [Line Items]
Revenue	2,839	3,004	3,186
Time-and-materials
Revenue, Major Customer [Line Items]
Revenue	2,681	2,500	1,501
Time-and-materials | Aerospace
Revenue, Major Customer [Line Items]
Revenue	852	855	650
Time-and-materials | Combat Systems
Revenue, Major Customer [Line Items]
Revenue	64	35	36
Time-and-materials | Information Technology
Revenue, Major Customer [Line Items]
Revenue	1,585	1,451	640
Time-and-materials | Mission Systems
Revenue, Major Customer [Line Items]
Revenue	167	154	165
Time-and-materials | Marine Systems
Revenue, Major Customer [Line Items]
Revenue	$ 13	$ 5	$ 10

Revenue (Revenue by Customer) (

Revenue (Revenue by Customer) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Revenue	$ 39,350	$ 36,193	$ 30,973
U.S. Government - Department of Defense
Revenue, Major Customer [Line Items]
Revenue	19,864	17,674	15,441
U.S. Government - Non Department of Defense
Revenue, Major Customer [Line Items]
Revenue	5,254	5,306	2,904
U.S. Government - Foreign Military Sales
Revenue, Major Customer [Line Items]
Revenue	689	626	676
U.S. Government
Revenue, Major Customer [Line Items]
Revenue	25,807	23,606	19,021
U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	6,175	4,972	4,498
Non-U.S. Government
Revenue, Major Customer [Line Items]
Revenue	3,723	4,002	3,442
Non-U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	3,645	3,613	4,012
Aerospace
Revenue, Major Customer [Line Items]
Revenue	9,801	8,455	8,129
Aerospace | U.S. Government - Department of Defense
Revenue, Major Customer [Line Items]
Revenue	305	236	189
Aerospace | U.S. Government - Non Department of Defense
Revenue, Major Customer [Line Items]
Revenue	88	0	0
Aerospace | U.S. Government - Foreign Military Sales
Revenue, Major Customer [Line Items]
Revenue	105	98	42
Aerospace | U.S. Government
Revenue, Major Customer [Line Items]
Revenue	498	334	231
Aerospace | U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	5,477	4,175	3,885
Aerospace | Non-U.S. Government
Revenue, Major Customer [Line Items]
Revenue	378	551	210
Aerospace | Non-U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	3,448	3,395	3,803
Combat Systems
Revenue, Major Customer [Line Items]
Revenue	7,007	6,241	5,949
Combat Systems | U.S. Government - Department of Defense
Revenue, Major Customer [Line Items]
Revenue	3,695	2,903	2,702
Combat Systems | U.S. Government - Non Department of Defense
Revenue, Major Customer [Line Items]
Revenue	13	8	8
Combat Systems | U.S. Government - Foreign Military Sales
Revenue, Major Customer [Line Items]
Revenue	340	317	374
Combat Systems | U.S. Government
Revenue, Major Customer [Line Items]
Revenue	4,048	3,228	3,084
Combat Systems | U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	229	251	220
Combat Systems | Non-U.S. Government
Revenue, Major Customer [Line Items]
Revenue	2,663	2,698	2,580
Combat Systems | Non-U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	67	64	65
Information Technology
Revenue, Major Customer [Line Items]
Revenue	8,422	8,269	4,410
Information Technology | U.S. Government - Department of Defense
Revenue, Major Customer [Line Items]
Revenue	3,573	3,213	1,802
Information Technology | U.S. Government - Non Department of Defense
Revenue, Major Customer [Line Items]
Revenue	4,652	4,790	2,340
Information Technology | U.S. Government - Foreign Military Sales
Revenue, Major Customer [Line Items]
Revenue	15	22	22
Information Technology | U.S. Government
Revenue, Major Customer [Line Items]
Revenue	8,240	8,025	4,164
Information Technology | U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	176	163	214
Information Technology | Non-U.S. Government
Revenue, Major Customer [Line Items]
Revenue	6	81	32
Information Technology | Non-U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	0	0	0
Mission Systems
Revenue, Major Customer [Line Items]
Revenue	4,937	4,726	4,481
Mission Systems | U.S. Government - Department of Defense
Revenue, Major Customer [Line Items]
Revenue	3,454	3,224	3,027
Mission Systems | U.S. Government - Non Department of Defense
Revenue, Major Customer [Line Items]
Revenue	499	506	556
Mission Systems | U.S. Government - Foreign Military Sales
Revenue, Major Customer [Line Items]
Revenue	41	44	46
Mission Systems | U.S. Government
Revenue, Major Customer [Line Items]
Revenue	3,994	3,774	3,629
Mission Systems | U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	151	138	108
Mission Systems | Non-U.S. Government
Revenue, Major Customer [Line Items]
Revenue	667	662	607
Mission Systems | Non-U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	125	152	137
Marine Systems
Revenue, Major Customer [Line Items]
Revenue	9,183	8,502	8,004
Marine Systems | U.S. Government - Department of Defense
Revenue, Major Customer [Line Items]
Revenue	8,837	8,098	7,721
Marine Systems | U.S. Government - Non Department of Defense
Revenue, Major Customer [Line Items]
Revenue	2	2	0
Marine Systems | U.S. Government - Foreign Military Sales
Revenue, Major Customer [Line Items]
Revenue	188	145	192
Marine Systems | U.S. Government
Revenue, Major Customer [Line Items]
Revenue	9,027	8,245	7,913
Marine Systems | U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	142	245	71
Marine Systems | Non-U.S. Government
Revenue, Major Customer [Line Items]
Revenue	9	10	13
Marine Systems | Non-U.S. Commercial
Revenue, Major Customer [Line Items]
Revenue	$ 5	$ 2	$ 7

Earnings Per Share (Details)

Earnings Per Share (Details) - shares shares in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted average shares outstanding (shares)		288,286	295,262	299,172
Dilutive effect of stock options and restricted stock/RSUs (shares)	[1]	2,550	3,898	5,465
Diluted weighted average shares outstanding (shares)		290,836	299,160	304,637
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive outstanding options excluded from computation of earnings per share (shares)		4,985	3,143	1,547
[1]	Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the year and, therefore, the effect of including these options would be antidilutive. These options totaled 4,985 in 2019 , 3,143 in 2018 and 1,547 in 2017 .

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets (liabilities)
Cash and equivalents	$ 11	$ 23
Available-for-sale debt securities	0
Available-for-sale debt securities		0
Equity securities	54	52
Other investments	0
Other investments		0
Cash flow hedges	0	0
Short- and long-term debt principal	0	0
Significant Other Observable Inputs (Level 2)
Financial assets (liabilities)
Cash and equivalents	13	6
Available-for-sale debt securities	129
Available-for-sale debt securities		121
Equity securities	0	0
Other investments	0
Other investments		0
Cash flow hedges	26	(69)
Short- and long-term debt principal	(12,339)	(12,346)
Significant Unobservable Inputs (Level 3)
Financial assets (liabilities)
Cash and equivalents	0	0
Available-for-sale debt securities	0
Available-for-sale debt securities		0
Equity securities	0	0
Other investments	4
Other investments		4
Cash flow hedges	0	0
Short- and long-term debt principal	0	0
Carrying Value
Financial assets (liabilities)
Cash and equivalents	24	29
Available-for-sale debt securities	129
Available-for-sale debt securities		121
Equity securities	54	52
Other investments	4
Other investments		4
Cash flow hedges	26	(69)
Short- and long-term debt principal	(12,005)	(12,518)
Fair Value
Financial assets (liabilities)
Cash and equivalents	24	29
Available-for-sale debt securities	129
Available-for-sale debt securities		121
Equity securities	54	52
Other investments	4
Other investments		4
Cash flow hedges	26	(69)
Short- and long-term debt principal	$ (12,339)	$ (12,346)

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Unfavorable impact in tax provision from change in tax law	$ 0	$ 0	$ 119
Deferred tax asset amount related to accumulated other comprehensive income	1,200	1,000
Investment of U.S. government accounts receivable in the CCF	340	$ 483
Net operating loss carryforwards	989
Tax credit carryforwards	$ 68
Possible chance of tax position sustainable, percentage	50.00%
Tax positions for which it is reasonably possible that the unrecognized tax benefits will significantly increase or decrease	$ 0

Income Taxes (Net Provision For

Income Taxes (Net Provision For Income Taxes For Continuing Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
U.S. federal	$ 471	$ 587	$ 656
State	36	48	31
International	119	95	77
Total current	626	730	764
Deferred:
U.S. federal	49	(37)	215
State	1	8	7
International	42	26	60
Adjustment for enacted change in U.S. tax law	0	0	119
Total deferred	92	(3)	401
Provision for income taxes, net	718	727	1,165
Net income tax payments	$ 572	$ 532	$ 617

Income Taxes (Reconciliation Fr

Income Taxes (Reconciliation From Statutory Federal Income Tax Rate To Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	35.00%
State tax on commercial operations, net of federal benefits	0.70%	1.10%	0.60%
Impact of international operations	0.20%	0.60%	(4.50%)
Domestic production deduction	0.00%	0.00%	(1.50%)
Foreign derived intangible income	(1.40%)	(1.20%)	0.00%
Equity-based compensation	(1.10%)	(1.10%)	(2.60%)
Domestic tax credits	(2.00%)	(1.10%)	(0.80%)
Contract close-outs	0.00%	(0.50%)	0.00%
Adoption impact of enacted change in U.S. tax law	0.00%	0.00%	2.90%
Other, net	(0.30%)	(1.00%)	(0.50%)
Effective income tax rate	17.10%	17.80%	28.60%

Income Taxes (Tax Effects Of Te

Income Taxes (Tax Effects Of Temporary Differences Between Reported Earnings And Taxable Earnings) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Retirement benefits	$ 1,097	$ 1,055
Lease assets	418	0
Tax loss and credit carryforwards	323	393
Salaries and wages	167	160
Workers' compensation	148	138
Other	367	351
Deferred assets	2,520	2,097
Valuation allowance	(291)	(336)
Net deferred assets	2,229	1,761
Intangible assets	(1,070)	(1,061)
Lease liabilities	(418)	0
Contract accounting methods	(375)	(530)
Property, plant and equipment	(291)	(265)
Capital Construction Fund qualified ships	(164)	(160)
Other	(359)	(284)
Deferred liabilities	(2,677)	(2,300)
Net deferred tax liability	$ (448)	$ (539)

Income Taxes (Net Deferred Tax

Income Taxes (Net Deferred Tax Asset (Liability)) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Noncurrent deferred tax asset	$ 33	$ 38
Noncurrent deferred tax liability	(481)	(577)
Net deferred tax liability	$ (448)	$ (539)

Accounts Receivable (Details)

Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable [Line Items]
Total accounts receivable	$ 3,544	$ 3,759
Non-U.S. Government
Accounts Receivable [Line Items]
Total accounts receivable	1,847	2,035
Receivables related to long-term production programs	1,700	1,900
Receivables related to long-term production programs, net of customer advances	(295)	(338)
U.S. Government
Accounts Receivable [Line Items]
Total accounts receivable	1,076	1,189
Commercial
Accounts Receivable [Line Items]
Total accounts receivable	$ 621	$ 535

Unbilled Receivables (Details)

Unbilled Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Contractors [Abstract]
Unbilled revenue	$ 33,481	$ 27,908
Advances and progress billings	(25,624)	(21,332)
Net unbilled receivables	$ 7,857	$ 6,576

Unbilled Receivables (Narrative

Unbilled Receivables (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivable		$ 33,481	$ 27,908
G&A costs in unbilled revenue		441	$ 381
Combat Systems | International Customer Through Canadian Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled receivable		$ 2,900
Subsequent Event | Combat Systems | International Customer Through Canadian Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Progress payments received in connection with outstanding receivables balance	$ 500

Inventory (Details)

Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Work in process	$ 4,419	$ 4,357
Raw materials	1,733	1,504
Finished goods	30	33
Pre-owned aircraft	124	83
Total inventories	$ 6,306	$ 5,977

Property, Plant And Equipment_3

Property, Plant And Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Machinery and equipment	$ 5,441	$ 5,152
Buildings and improvements	3,232	2,962
Land and improvements	400	386
Construction in process	688	472
Total property, plant and equipment	9,761	8,972
Accumulated depreciation	(5,286)	(4,994)
Property, plant and equipment, net	$ 4,475	$ 3,978
Buildings And Improvements
Property, Plant and Equipment [Line Items]
Depreciable life, maximum, years	50 years
Machinery And Equipment
Property, Plant and Equipment [Line Items]
Depreciable life, maximum, years	30 years

Debt (Details)

Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt principal	$ 12,005	$ 12,518
Less unamortized debt issuance costs and discounts	75	101
Total debt	11,930	12,417
Short-term debt and current portion of long-term debt	2,920	973
Long-term debt	9,010	11,444
Commercial Paper
Debt Instrument [Line Items]
Short-term debt	$ 0	850
Weighed average interest rate	2.568%
Fixed Rate Notes Due May 2020
Debt Instrument [Line Items]
Long-term debt	$ 2,000	2,000
Interest rate	2.875%
Fixed Rate Notes Due May 2021
Debt Instrument [Line Items]
Long-term debt	$ 2,000	2,000
Interest rate	3.00%
Fixed Rate Notes Due July 2021
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Interest rate	3.875%
Fixed Rate Notes Due November 2022
Debt Instrument [Line Items]
Long-term debt	$ 1,000	1,000
Interest rate	2.25%
Fixed Rate Notes Due May 2023
Debt Instrument [Line Items]
Long-term debt	$ 750	750
Interest rate	3.375%
Fixed Rate Notes Due August 2023
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Interest rate	1.875%
Fixed Rate Notes Due November 2024
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Interest rate	2.375%
Fixed Rate Notes Due May 2025
Debt Instrument [Line Items]
Long-term debt	$ 750	750
Interest rate	3.50%
Fixed Rate Notes Due August 2026
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Interest rate	2.125%
Fixed Rate Notes Due November 2027
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Interest rate	2.625%
Fixed Rate Notes Due May 2028
Debt Instrument [Line Items]
Long-term debt	$ 1,000	1,000
Interest rate	3.75%
Fixed Rate Notes Due November 2042
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Interest rate	3.60%
Floating Rate Notes Due May 2020 | LIBOR
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Basis spread on variable rate	0.29%
Floating Rate Notes Due May 2021 | LIBOR
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Basis spread on variable rate	0.38%
Other Debt Securities
Debt Instrument [Line Items]
Long-term debt	$ 505	$ 168
Other interest rate	Various

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 31, 2018
Debt Outstanding [Line Items]
Interest payments	$ 434	$ 312	$ 93
Percentage of owned subsidiaries guaranteed fixed- and floating-rate notes	100.00%
Credit facility, maximum borrowing capacity	$ 5,000
Credit Facility | 364-day Committed Bank Credit Facility
Debt Outstanding [Line Items]
Credit facility, maximum borrowing capacity	$ 2,000
Debt instrument term	364 days
Commercial Paper
Debt Outstanding [Line Items]
Commercial paper outstanding	$ 0	850
Weighed average interest rate	2.568%
LIBOR | Floating Rate Notes Due May 2020
Debt Outstanding [Line Items]
Long-term debt	$ 500	500
LIBOR | Floating Rate Notes Due May 2021
Debt Outstanding [Line Items]
Long-term debt	500	$ 500
Notes
Debt Outstanding [Line Items]
Debt issued				$ 7,500
Credit Facility | Multi-year Facility Expiring November 2020
Debt Outstanding [Line Items]
Credit facility, maximum borrowing capacity	1,000
Credit Facility | Multi Year Facility Expiring March 2023
Debt Outstanding [Line Items]
Credit facility, maximum borrowing capacity	$ 2,000

Debt Debt (Aggregate Amounts Of

Debt Debt (Aggregate Amounts Of Scheduled Maturities Of Debt For The Next Five Years) (Details) $ in Millions	Dec. 31, 2019USD ($)
Debt Disclosure [Abstract]
2020	$ 2,922
2021	3,009
2022	1,009
2023	1,255
2024	505
Thereafter	3,305
Total debt	$ 12,005

Other Liabilities (Details)

Other Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Salaries and wages		$ 941	$ 952
Retirement benefits		296	272
Less current portion of lease liabilities		252	0
Workers' compensation		306	244
Fair value of cash flow hedges		32	141
Other	[1]	1,744	1,708
Total other current liabilities		3,571	3,317
Retirement benefits		5,172	4,422
Long-term lease liabilities		1,251	0
Customer deposits on commercial contracts		709	726
Deferred income taxes		481	577
Other	[2]	1,840	1,768
Total other liabilities		$ 9,453	$ 7,493
[1]	Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace segment, liabilities of discontinued operations, finance lease liabilities and insurance-related costs.
[2]	Consists primarily of warranty reserves, workers’ compensation liabilities, finance lease liabilities and liabilities of discontinued operations.

Shareholders' Equity - (Narrati

Shareholders' Equity - (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 05, 2018
Class of Stock [Line Items]
Authorized capital stock, common stock (shares)	500,000,000
Common stock, par value (in dollars per share)	$ 1
Authorized capital stock, preferred stock (shares)	50,000,000
Preferred stock, par value (in dollars per share)	$ 1
Common stock, issued (shares)	481,880,634	481,880,634
Common stock, outstanding (shares)	289,610,336	288,698,149
Preferred stock, outstanding (shares)	0	0
Share repurchased, additional amount authorized (shares)				10,000,000
Stock repurchased (shares)	1,100,000	10,100,000	7,800,000
Shares repurchased	$ 184	$ 1,806	$ 1,533
Shares remaining under a prior authorization	6,400,000
Percent of total shares outstanding authorized for repurchase	2.00%
Dividends declared per share	$ 4.08	$ 3.72	$ 3.36
Dividends paid	$ (1,152)	$ (1,075)	$ (986)
Pretax recognized actuarial losses	318	355	358
Pretax amortization of prior service credit	$ 22	$ 50	$ 69
Restricted Stock
Class of Stock [Line Items]
Unvested restricted stock (shares)	657,692

Shareholders' Equity - (Accumul

Shareholders' Equity - (Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		$ (3,778)	$ (2,820)	$ (3,387)
Cumulative effect adjustment	[1]		(638)
Other comprehensive loss, pretax		(603)	(325)	718
Benefit from (provision for) income tax, net		162	5	(151)
Other comprehensive (loss) income, net amount		(441)	(320)	567
Ending balance		(4,219)	(3,778)	(2,820)
Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(71)	(94)	(345)
Cumulative effect adjustment	[1]		(4)
Other comprehensive loss, pretax		97	36	341
Benefit from (provision for) income tax, net		(24)	(9)	(90)
Other comprehensive (loss) income, net amount		73	27	251
Ending balance		2	(71)	(94)
Unrealized Gains (Losses) On Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		0	19	14
Cumulative effect adjustment	[1]		(19)
Other comprehensive loss, pretax		0	0	9
Benefit from (provision for) income tax, net		0	0	(4)
Other comprehensive (loss) income, net amount		0	0	5
Ending balance		0	0	19
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		102	402	69
Cumulative effect adjustment	[1]		0
Other comprehensive loss, pretax		186	(300)	348
Benefit from (provision for) income tax, net		0	0	(15)
Other comprehensive (loss) income, net amount		186	(300)	333
Ending balance		288	102	402
Changes In Retirement Plans' Funded Status
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(3,809)	(3,147)	(3,125)
Cumulative effect adjustment	[1]		(615)
Other comprehensive loss, pretax		(886)	(61)	20
Benefit from (provision for) income tax, net		186	14	(42)
Other comprehensive (loss) income, net amount		(700)	(47)	(22)
Ending balance		$ (4,509)	$ (3,809)	$ (3,147)
[1]	Reflects the cumulative effects of ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which we adopted on January 1, 2018.

Derivative Financial Instrume_2

Derivative Financial Instruments And Hedging Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Average maturity of foreign currency forward contracts, in years	1 year
Cash and equivalents	$ 902	$ 963
Marketable securities held in trust	207
Derivative notional amount	$ 5,000	$ 5,800
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Maturity of fixed-income securities, in years	5 years

Commitments And Contingencies_2

Commitments And Contingencies (Narrative) (Details) employee in Thousands, $ in Billions	12 Months Ended
	Dec. 31, 2019USD ($)agreementemployee
Commitments and Contingencies [Line Items]
Letters of credit | $	$ 1.5
Number of company-negotiated labor agreements	60
Number of collective agreements expected to be renegotiated	28
Number of employees covered by expected renegotiated collective agreements | employee	10
Unionized Employees Concentration Risk
Commitments and Contingencies [Line Items]
Percent of employees represented by labor organizations	20.00%
Maximum | Aerospace
Commitments and Contingencies [Line Items]
Period preceding delivery of aircraft to customer fair market value of trade-in aircraft is established, days, maximum	45 days

Commitments And Contingencies_3

Commitments And Contingencies (Changes in Product Warranty Liabilities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance	$ 480	$ 467	$ 474
Warranty expense	258	129	146
Payments	(105)	(102)	(123)
Adjustments	(14)	(14)	(30)
Ending balance	$ 619	$ 480	$ 467

Equity Compensation Plans (Narr

Equity Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of shares available for grant (shares)	26
Weighted average fair value per option granted	$ 29.06	$ 37.42	$ 33.09
Stock option expense reduced operating earnings	$ 55	$ 57	$ 53
Stock option expense earnings per share	$ 0.15	$ 0.15	$ 0.11
Total intrinsic value of options exercised	$ 244	$ 147	$ 215
Stock Options
Awards vesting period	3 years
Awards expiration period	10 years
Unrecognized compensation cost related to stock options	$ 70
Recognition period for unrecognized compensation cost for restricted stock	1 year 9 months 18 days
Stock Options | Vesting After Two years
Percentage of stock options vesting in a period of one year	50.00%
Stock Options | Vesting In Third Year
Percentage of stock options vesting in a period of one year	50.00%
Restricted Stock and Restricted Stock Units (RSUs)
Awards vesting period	3 years
Stock option expense reduced operating earnings	$ 79	$ 83	$ 70
Stock option expense earnings per share	$ 0.21	$ 0.22	$ 0.15
Unrecognized compensation cost related to stock options	$ 53
Recognition period for unrecognized compensation cost for restricted stock	1 year 7 months 6 days
Fair value of vesting shares	$ 88	$ 242	$ 200

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Option to extend lease period	30 years
Option to terminate lease period	1 year
Percentage of leased real estate of total lease obligation	75.00%
Operating lease expense under ASC Topic 840		$ 380	$ 309
Gross amounts of capital lease assets under ASC 840 Topic		485
Accumulated depreciation of assets recorded as capital leases under ASC 840 Topic	$ 5,286	4,994
Additional leases that have not yet commenced	$ 116
Assets Held under Capital Leases
Lessee, Lease, Description [Line Items]
Accumulated depreciation of assets recorded as capital leases under ASC 840 Topic		$ 61
Minimum
Lessee, Lease, Description [Line Items]
Term of leases that have not yet commenced	1 year
Maximum
Lessee, Lease, Description [Line Items]
Term of leases that have not yet commenced	20 years

Equity Compensation Plans (Sche

Equity Compensation Plans (Schedule Of Equity Based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Payment Arrangement [Abstract]
Stock options	$ 43	$ 45	$ 34
Restricted stock/RSUs	62	65	46
Total equity-based compensation expense, net of tax	$ 105	$ 110	$ 80

Leases - Components of Lease Co

Leases - Components of Lease Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Finance lease cost:
Amortization of right-of-use assets	$ 86
Interest on lease liabilities	24
Operating lease cost	332
Short-term lease cost	75
Variable lease cost	14
Sublease income	(13)
Total lease costs, net	$ 518

Equity Compensation Plans (Sc_2

Equity Compensation Plans (Schedule Of Assumption Of Fair Value Options On The Date Of Grant Using Black-Scholes Option Pricing Model) (Details) - Stock Options	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility, minimum	19.70%	17.60%	17.30%
Expected volatility, maximum	20.00%	18.20%	19.40%
Weighted average expected volatility	19.70%	17.60%	19.40%
Expected term (in months)	64 months	68 months	68 months
Risk - free interest rate, minimum	1.70%	2.60%	2.00%
Risk - free interest rate, maximum	2.60%	2.90%	2.20%
Expected dividend yield	2.00%	1.80%	1.80%

Leases - Additional Informati_2

Leases - Additional Information Related to Leases (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 325
Operating cash flows from finance leases	24
Financing cash flows from finance leases	57
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases	365
Finance leases	$ 50
Weighted-average remaining lease term:
Operating leases	10 years 8 months 12 days
Finance leases	6 years 1 month 6 days
Weighted-average discount rate:
Operating leases	3.00%
Finance leases	8.00%

Equity Compensation Plans (Summ

Equity Compensation Plans (Summary Of Stock Option Activity) (Details)	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding balance - shares under option, beginning | shares	10,765,195
Granted - shares under option | shares	2,115,740
Exercised - shares under option | shares	(2,757,815)
Forfeited/cancelled - shares under option | shares	(355,371)
Outstanding balance - shares under option, ending | shares	9,767,749
Vested and expected to vest on December 31, 2017 - shares under option | shares	9,538,150
Exercisable on December 31, 2017 - shares under option | shares	5,484,562
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding balance - weighted average exercise price, beginning | $ / shares	$ 143.43
Granted - weighted average exercise price | $ / shares	167.92
Exercised - weighted average exercise price | $ / shares	91.34
Forfeited/cancelled - weighted average exercise price | $ / shares	195.59
Outstanding balance - weighted average exercise price, ending | $ / shares	161.54
Vested and expected to vest on December 31, 2017 - weighted average exercise price | $ / shares	161.10
Exercisable on December 31, 2017 - weighted average exercise price | $ / shares	$ 137.92

Leases - Future Minimum Lease P

Leases - Future Minimum Lease Payments Due Under ASC 842 Guidance (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Operating Leases
2020	$ 302
2021	261
2022	212
2023	163
2024	136
Thereafter	790
Total future lease payments	1,864
Less imputed interest	361
Present value of future lease payments	1,503
Less current portion of lease liabilities	252	$ 0
Long-term lease liabilities	1,251	$ 0
ROU assets	1,432
Finance Leases
2020	91
2021	83
2022	83
2023	36
2024	19
Thereafter	131
Total future lease payments	443
Less imputed interest	89
Present value of future lease payments	354
Less current portion of lease liabilities	67
Long-term lease liabilities	287
ROU assets	$ 391

Equity Compensation Plans (Sc_3

Equity Compensation Plans (Schedule Of Stock Options' Intrinsic Value And Remaining Contractual Term) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Share-based Payment Arrangement [Abstract]
Outstanding - weighted average remaining contractual term (in years)	6 years 4 months 24 days
Vested and expected to vest - weighted average remaining contractual term (in years)	6 years 4 months 24 days
Exercisable - weighted average remaining contractual term (in years)	4 years 9 months 18 days
Outstanding - aggregate intrinsic value	$ 242
Vested and expected to vest - aggregate intrinsic value	241
Exercisable - aggregate intrinsic value	$ 225

Leases - Future Minimum Lease_2

Leases - Future Minimum Lease Payments Due Under ASC 840 Guidance (Details) $ in Millions	Dec. 31, 2018USD ($)
Operating Leases
2019	$ 297
2020	234
2021	196
2022	154
2023	110
Thereafter	698
Total future minimum lease payments	1,689
Capital Leases
2019	92
2020	84
2021	78
2022	79
2023	30
Thereafter	70
Total future minimum lease payments	433
Less amount representing interest	95
Less amount representing executory costs	19
Present value of net minimum lease payments	319
Less current maturities of capital lease liabilities	64
Noncurrent capital lease liabilities	$ 255

Equity Compensation Plans (Su_2

Equity Compensation Plans (Summary Of Restricted Stock And Restricted Stock Unit Activity) (Details) - Restricted Stock and Restricted Stock Units (RSUs)	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested - beginning balance (shares) | shares	1,262,276
Granted (shares) | shares	556,922
Vested (shares) | shares	(541,997)
Forfeited (shares) | shares	(52,837)
Nonvested - ending balance (shares) | shares	1,224,364
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested, weighted average grant-date fair value - beginning balance | $ / shares	$ 171.62
Granted, weighted average grant-date fair value | $ / shares	161.43
Vested, weighted average grant-date fair value | $ / shares	138.73
Forfeited, weighted average grant-date fair value | $ / shares	183.81
Nonvested, weighted average grant-date fair value - ending balance | $ / shares	$ 181.11

Retirement Plans (Narrative) (D

Retirement Plans (Narrative) (Details) shares in Millions, $ in Millions	Jan. 01, 2019	Jan. 01, 2017	Dec. 31, 2019USD ($)plan	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)
Compensation And Retirement Disclosure Line Items
Defined contribution plan, cost recognized | $			$ 333	$ 302	$ 274
Common stock, shares held in employee trust (shares) | shares				20
Percentage of defined contribution plans held from outstanding shares			7.00%	7.00%
Number of noncontributory defined benefit pension plans covering government business employees | plan			12
Number of contributory defined benefit pension plans covering government business employees | plan			5
Number of noncontributory defined benefit pension plans covering commercial business employees | plan			2
Number of contributory defined benefit pension plans covering commercial business employees | plan			4
Number of non-qualified supplemental executive plans | plan			1
Required employer contributions to defined benefit retirement plans during fiscal year | $			$ 185
Period in which the difference between the actual and expected return on plan assets for qualified plans are recognized in years			5 years
Expected change in long-term rate of return on assets	(1.00%)	(0.75%)
Percentage of pension plan assets held in a single trust for primary domestic government and commercial pension plans			90.00%
Redemption notice period			90 days
Pension Benefits
Compensation And Retirement Disclosure Line Items
Expected contribution to defined benefit contribution plans in next fiscal year | $			$ 470
Benefit obligation weighed average discount rate			3.19%	4.28%	3.69%
Defined benefit plan, accumulated benefit obligation | $			$ 17,800	$ 15,500
Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Benefit obligation weighed average discount rate			3.18%	4.24%
Defined benefit plan, accumulated benefit obligation | $			$ 1,000	$ 935

Retirement Plans (Schedule of B

Retirement Plans (Schedule of Benefits To Be Paid From Retirement Plans Over The Next Ten Years) (Details) $ in Millions	Dec. 31, 2019USD ($)
Pension Benefits
Compensation And Retirement Disclosure Line Items
2020	$ 853
2021	880
2022	905
2023	929
2024	957
2025-2029	5,020
Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
2020	66
2021	65
2022	64
2023	63
2024	62
2025-2029	$ 286

Retirement Plans (Schedule of A

Retirement Plans (Schedule of Annual Pension and Other Post-Retirement Benefit Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 111	$ 180	$ 168
Interest cost	600	532	453
Expected return on plan assets	(911)	(856)	(679)
Recognized net actuarial loss (gain)	326	359	362
Amortization of prior service credit	(19)	(46)	(66)
Annual benefit (credit) cost	107	169	238
Other Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	10	9
Interest cost	35	33	30
Expected return on plan assets	(36)	(40)	(34)
Recognized net actuarial loss (gain)	(8)	(4)	(4)
Amortization of prior service credit	(3)	(4)	(3)
Annual benefit (credit) cost	$ (4)	$ (5)	$ (2)

Retirement Plans (Reconciliatio

Retirement Plans (Reconciliation of Benefit Obligations And Plan or Trust Assets And Resulting Funded Status Of Defined Benefit Retirement Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Change in Benefit Obligation
Benefit obligation at beginning of year	$ (15,720)	$ (14,212)
Service cost	(111)	(180)	$ (168)
Interest cost	(600)	(532)	(453)
Acquisitions	0	(2,758)
Amendments	(3)	15
Actuarial gain (loss)	(2,446)	1,183
Settlement/curtailment/other	(33)	23
Benefits paid	806	741
Benefit obligation at end of year	(18,107)	(15,720)	(14,212)
Change in Plan/Trust Assets
Fair value of assets at beginning of year	11,532	10,130
Actual return on plan assets	2,206	(749)
Acquisitions	0	2,328
Employer contributions	185	571
Settlement/curtailment/other	39	(26)
Benefits paid	(785)	(722)
Fair value of assets at end of year	13,177	11,532	10,130
Funded status at end of year	(4,930)	(4,188)
Other Post-retirement Benefits
Change in Benefit Obligation
Benefit obligation at beginning of year	(935)	(996)
Service cost	(8)	(10)	(9)
Interest cost	(35)	(33)	(30)
Acquisitions	0	(62)
Amendments	(8)	0
Actuarial gain (loss)	(101)	78
Settlement/curtailment/other	(4)	21
Benefits paid	64	67
Benefit obligation at end of year	(1,027)	(935)	(996)
Change in Plan/Trust Assets
Fair value of assets at beginning of year	570	541
Actual return on plan assets	117	(4)
Acquisitions	0	77
Employer contributions	2	1
Settlement/curtailment/other	0	0
Benefits paid	(45)	(45)
Fair value of assets at end of year	644	570	$ 541
Funded status at end of year	$ (383)	$ (365)

Retirement Plans (Amounts Recog

Retirement Plans (Amounts Recognized on The Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current liabilities	$ (296)	$ (272)
Noncurrent liabilities	(5,172)	(4,422)
Pension Benefits
Noncurrent assets	61	67
Current liabilities	(166)	(131)
Noncurrent liabilities	(4,825)	(4,124)
Net liability recognized	(4,930)	(4,188)
Other Post-retirement Benefits
Noncurrent assets	94	74
Current liabilities	(130)	(141)
Noncurrent liabilities	(347)	(298)
Net liability recognized	$ (383)	$ (365)

Retirement Plans (Amounts Defer

Retirement Plans (Amounts Deferred In AOCL) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Compensation And Retirement Disclosure Line Items
Net actuarial loss (gain)	$ 5,784	$ 4,959
Prior service (credit) cost	(73)	(95)
Total amount recognized in AOCI, pre-tax	5,711	4,864
Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Net actuarial loss (gain)	(9)	(37)
Prior service (credit) cost	12	1
Total amount recognized in AOCI, pre-tax	$ 3	$ (36)

Retirement Plans (Reconciliat_2

Retirement Plans (Reconciliation of The Change In AOCL For Defined-Benefit Retirement Plans) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amortization of:
Prior service credit		$ (22)	$ (50)	$ (69)
Change in AOCL, pretax		886	61	$ (20)
Pension Benefits
Compensation And Retirement Disclosure Line Items
Net actuarial loss (gain)		1,151	422
Prior service credit (cost)		3	(15)
Amortization of:
Net actuarial (loss) gain from prior years		(326)	(359)
Prior service credit		19	46
Other	[1]	0	(5)
Change in AOCL, pretax		847	89
Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Net actuarial loss (gain)		20	(34)
Prior service credit (cost)		8	0
Amortization of:
Net actuarial (loss) gain from prior years		8	4
Prior service credit		3	4
Other	[1]	0	(2)
Change in AOCL, pretax		$ 39	$ (28)
[1]	Includes foreign exchange translation, curtailment and other adjustments.

Retirement Plans Retirement Pla

Retirement Plans Retirement Plans (Schedule of PBO That Exceeded Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
PBO	$ (17,651)	$ (15,354)
Fair value of plan assets	$ 12,673	$ 11,116

Retirement Plans (Schedule of_2

Retirement Plans (Schedule of ABO That Exceeded Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Compensation And Retirement Disclosure Line Items
PBO	$ (17,651)	$ (15,354)
Pension Benefits
Compensation And Retirement Disclosure Line Items
ABO	(17,080)	(14,856)
Fair value of plan assets	12,354	10,832
Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
ABO	(783)	(709)
Fair value of plan assets	$ 301	$ 264

Retirement Plans (Weighted Aver

Retirement Plans (Weighted Average Assumptions Used To Determine Benefit Obligations) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Compensation And Retirement Disclosure Line Items
Benefit obligation discount rate	3.19%	4.28%	3.69%
Rate of increase in compensation levels	2.68%	2.79%
Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Benefit obligation discount rate	3.18%	4.24%
Healthcare cost trend rate:
Trend rate for next year	6.00%	6.50%
Ultimate trend rate	5.00%	5.00%
Year rate reaches ultimate trend rate	2024	2024

Retirement Plans Retirement P_2

Retirement Plans Retirement Plans (Weighted Average Assumptions Used to Determine Net Annual Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	4.28%	3.69%	4.19%
Service cost	3.81%	3.51%	4.13%
Interest cost	3.92%	3.34%	3.56%
Expected long-term rate of return on assets	7.46%	7.45%	7.43%
Rate of increase in compensation levels	2.77%	2.79%	2.90%
Other Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation	4.24%	3.64%	4.11%
Service cost	4.23%	3.79%	4.34%
Interest cost	3.88%	3.27%	3.43%
Expected long-term rate of return on assets	6.84%	7.75%	7.76%

Retirement Plans (Asset Allocat

Retirement Plans (Asset Allocation Policy Ranges) (Details)	Dec. 31, 2019
Equities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	48.00%
Equities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	68.00%
Fixed income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	20.00%
Fixed income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	48.00%
Cash | Minimum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	0.00%
Cash | Maximum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	5.00%
Other asset classes | Minimum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	0.00%
Other asset classes | Maximum
Defined Benefit Plan Disclosure [Line Items]
Asset allocation policy range	16.00%

Retirement Plans (Fair Value of

Retirement Plans (Fair Value of Plan Assets By Investment Category And The Corresponding Level Within The Fair Value Hierarchy) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Compensation And Retirement Disclosure Line Items
Maximum equity holding percentage of total fair value		1.00%	1.00%
Pension Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		$ 13,177	$ 11,532	$ 10,130
Pension Benefits | Cash and equivalents
Compensation And Retirement Disclosure Line Items
Total pension plan assets		56	73
Pension Benefits | U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	958	732
Pension Benefits | Non-U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	128	117
Pension Benefits | Private equity investments
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	26	20
Pension Benefits | Corporate bonds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[2]	2,163	1,600
Pension Benefits | Treasury securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		1,855	1,410
Pension Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		6,494	5,243
Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets	[3]	14
Pension Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		365	624
Pension Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		84	68
Pension Benefits | Insurance deposit contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		137	128
Pension Benefits | Retirement annuity contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		35
Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		644	570	541
Other Post-retirement Benefits | Cash and equivalents
Compensation And Retirement Disclosure Line Items
Total pension plan assets		18	23
Other Post-retirement Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		288	237
Other Post-retirement Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		113	111
Other Post-retirement Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		2	2
Other Post-retirement Benefits | Equity securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		92	80
Other Post-retirement Benefits | Fixed-income securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		122	87
Fair Value | Pension Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		12,301	10,015
Fair Value | Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		635	540
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		1,086	849
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Cash and equivalents
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	958	732
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Non-U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	128	117
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Private equity investments
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Corporate bonds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[2]	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Treasury securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Insurance deposit contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Retirement annuity contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		94	82
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Post-retirement Benefits | Cash and equivalents
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Post-retirement Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Post-retirement Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Post-retirement Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		2	2
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Post-retirement Benefits | Equity securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		92	80
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Post-retirement Benefits | Fixed-income securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Other Observable Inputs (Level 2) | Pension Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		10,933	8,950
Significant Other Observable Inputs (Level 2) | Pension Benefits | Cash and equivalents
Compensation And Retirement Disclosure Line Items
Total pension plan assets		56	73
Significant Other Observable Inputs (Level 2) | Pension Benefits | U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	0	0
Significant Other Observable Inputs (Level 2) | Pension Benefits | Non-U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	0	0
Significant Other Observable Inputs (Level 2) | Pension Benefits | Private equity investments
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	0	0
Significant Other Observable Inputs (Level 2) | Pension Benefits | Corporate bonds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		2,163	1,600
Significant Other Observable Inputs (Level 2) | Pension Benefits | Treasury securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		1,855	1,410
Significant Other Observable Inputs (Level 2) | Pension Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		6,494	5,243
Significant Other Observable Inputs (Level 2) | Pension Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		365	624
Significant Other Observable Inputs (Level 2) | Pension Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Other Observable Inputs (Level 2) | Pension Benefits | Insurance deposit contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Other Observable Inputs (Level 2) | Pension Benefits | Retirement annuity contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0
Significant Other Observable Inputs (Level 2) | Other Post-retirement Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		541	458
Significant Other Observable Inputs (Level 2) | Other Post-retirement Benefits | Cash and equivalents
Compensation And Retirement Disclosure Line Items
Total pension plan assets		18	23
Significant Other Observable Inputs (Level 2) | Other Post-retirement Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		288	237
Significant Other Observable Inputs (Level 2) | Other Post-retirement Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		113	111
Significant Other Observable Inputs (Level 2) | Other Post-retirement Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Other Observable Inputs (Level 2) | Other Post-retirement Benefits | Equity securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Other Observable Inputs (Level 2) | Other Post-retirement Benefits | Fixed-income securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		122	87
Significant Unobservable Inputs (Level 3)
Compensation And Retirement Disclosure Line Items
Total pension plan assets		282	216	189
Significant Unobservable Inputs (Level 3) | Private equity investments
Compensation And Retirement Disclosure Line Items
Total pension plan assets		26	20	18
Significant Unobservable Inputs (Level 3) | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		84	68	51
Significant Unobservable Inputs (Level 3) | Insurance deposit contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		137	128	120
Significant Unobservable Inputs (Level 3) | Retirement annuity contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		35	0	$ 0
Significant Unobservable Inputs (Level 3) | Pension Benefits
Compensation And Retirement Disclosure Line Items
Total pension plan assets		282	216
Significant Unobservable Inputs (Level 3) | Pension Benefits | Cash and equivalents
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Unobservable Inputs (Level 3) | Pension Benefits | U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	0	0
Significant Unobservable Inputs (Level 3) | Pension Benefits | Non-U.S. companies
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	0	0
Significant Unobservable Inputs (Level 3) | Pension Benefits | Private equity investments
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[1]	26	20
Significant Unobservable Inputs (Level 3) | Pension Benefits | Corporate bonds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[2]	0	0
Significant Unobservable Inputs (Level 3) | Pension Benefits | Treasury securities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Unobservable Inputs (Level 3) | Pension Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Unobservable Inputs (Level 3) | Pension Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		0	0
Significant Unobservable Inputs (Level 3) | Pension Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets		84	68
Significant Unobservable Inputs (Level 3) | Pension Benefits | Insurance deposit contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		137	128
Significant Unobservable Inputs (Level 3) | Pension Benefits | Retirement annuity contracts
Compensation And Retirement Disclosure Line Items
Total pension plan assets		35
Plan assets measured using NAV as a practical expedient | Pension Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[3]		86
Plan assets measured using NAV as a practical expedient | Pension Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[3]		101
Plan assets measured using NAV as a practical expedient | Pension Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[3]	443	420
Plan assets measured using NAV as a practical expedient | Pension Benefits | Hedge funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[3]	419	910
Plan assets measured using NAV as a practical expedient | Other Post-retirement Benefits | Equities
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[4]	5	22
Plan assets measured using NAV as a practical expedient | Other Post-retirement Benefits | Fixed-income funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[4]		3
Plan assets measured using NAV as a practical expedient | Other Post-retirement Benefits | Real estate funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[4]		2
Plan assets measured using NAV as a practical expedient | Other Post-retirement Benefits | Hedge funds
Compensation And Retirement Disclosure Line Items
Total pension plan assets	[4]	$ 4	$ 3
[1]	No single equity holding amounted to more than 1% of the total fair value.
[2]	Our corporate bond investments had an average rating of A+ .
[3]	Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets.
[4]	Investments measured at fair value using NAV as a practical expedient are not classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets.

Retirement Plans (Changes in Le

Retirement Plans (Changes in Level 3 Retirement Plan Assets) (Details) - Significant Unobservable Inputs (Level 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of assets at beginning of year	$ 216	$ 189
Unrealized gains (losses), net	17	(1)
Realized gains, net		3
Purchases, sales, and settlements, net	49	25
Fair value of assets at end of year	282	216
Private equity investments
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of assets at beginning of year	20	18
Unrealized gains (losses), net	5	0
Realized gains, net		0
Purchases, sales, and settlements, net	1	2
Fair value of assets at end of year	26	20
Real Estate Funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of assets at beginning of year	68	51
Unrealized gains (losses), net	6	(1)
Realized gains, net		0
Purchases, sales, and settlements, net	10	18
Fair value of assets at end of year	84	68
Insurance Deposits Contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of assets at beginning of year	128	120
Unrealized gains (losses), net	6	0
Realized gains, net		3
Purchases, sales, and settlements, net	3	5
Fair value of assets at end of year	137	128
Retirement annuity contracts
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of assets at beginning of year	0	0
Unrealized gains (losses), net	0	0
Realized gains, net		0
Purchases, sales, and settlements, net	35	0
Fair value of assets at end of year	$ 35	$ 0

Segment Information (Narrative)

Segment Information (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)Segment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | Segment	5
Revenue	$ 39,350	$ 36,193	$ 30,973
Earnings from continuing operations before income tax	$ 4,202	$ 4,085	$ 4,077
Long-lived assets of non-U.S. operations percent of total	4.00%	3.00%	5.00%
International Operations
Segment Reporting Information [Line Items]
Revenue	$ 4,400	$ 4,200	$ 3,700
Earnings from continuing operations before income tax	600	$ 578	$ 550
CSRA
Segment Reporting Information [Line Items]
One-time charges associated with costs to complete acquisition	$ 45

Segment Information (Segment Re

Segment Information (Segment Reporting Information) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue		$ 39,350	$ 36,193	$ 30,973
Operating earnings		4,648	4,457	4,236
Total assets		48,841	45,408	35,046
Capital Expenditures		987	690	428
Depreciation and Amortization		829	763	441
U.S. Government
Segment Reporting Information [Line Items]
Revenue		25,807	23,606	19,021
Aerospace
Segment Reporting Information [Line Items]
Revenue		9,801	8,455	8,129
Aerospace | U.S. Government
Segment Reporting Information [Line Items]
Revenue		498	334	231
Combat Systems
Segment Reporting Information [Line Items]
Revenue		7,007	6,241	5,949
Combat Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		4,048	3,228	3,084
Information Technology
Segment Reporting Information [Line Items]
Revenue		8,422	8,269	4,410
Information Technology | U.S. Government
Segment Reporting Information [Line Items]
Revenue		8,240	8,025	4,164
Mission Systems
Segment Reporting Information [Line Items]
Revenue		4,937	4,726	4,481
Mission Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		3,994	3,774	3,629
Marine Systems
Segment Reporting Information [Line Items]
Revenue		9,183	8,502	8,004
Marine Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		9,027	8,245	7,913
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Revenue		9,801	8,455	8,129
Operating earnings		1,532	1,490	1,577
Total assets		12,324	11,220	10,126
Capital Expenditures		138	194	132
Depreciation and Amortization		178	154	147
Operating Segments | Aerospace | U.S. Government
Segment Reporting Information [Line Items]
Revenue		498	334	231
Operating Segments | Combat Systems
Segment Reporting Information [Line Items]
Revenue		7,007	6,241	5,949
Operating earnings		996	962	937
Total assets		11,220	9,853	9,846
Capital Expenditures		109	91	84
Depreciation and Amortization		85	87	86
Operating Segments | Combat Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		4,048	3,228	3,084
Operating Segments | Information Technology
Segment Reporting Information [Line Items]
Revenue		8,422	8,269	4,410
Operating earnings		628	608	373
Total assets		14,248	14,159	3,021
Capital Expenditures		147	62	16
Depreciation and Amortization		377	333	32
Operating Segments | Information Technology | U.S. Government
Segment Reporting Information [Line Items]
Revenue		8,240	8,025	4,164
Operating Segments | Mission Systems
Segment Reporting Information [Line Items]
Revenue		4,937	4,726	4,481
Operating earnings		683	659	638
Total assets		6,205	5,984	5,856
Capital Expenditures		75	49	47
Depreciation and Amortization		60	65	60
Operating Segments | Mission Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		3,994	3,774	3,629
Operating Segments | Marine Systems
Segment Reporting Information [Line Items]
Revenue		9,183	8,502	8,004
Operating earnings		785	761	685
Total assets		3,918	3,130	2,906
Capital Expenditures		449	243	123
Depreciation and Amortization		122	116	109
Operating Segments | Marine Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		9,027	8,245	7,913
Corporate
Segment Reporting Information [Line Items]
Revenue		0	0	0
Operating earnings		24	(23)	26
Total assets	[1]	926	1,062	3,291
Capital Expenditures	[1]	69	51	26
Depreciation and Amortization	[1]	7	8	7
Corporate | U.S. Government
Segment Reporting Information [Line Items]
Revenue		$ 0	$ 0	$ 0
[1]	Corporate identifiable assets are primarily cash and equivalents.

Segment Information (Schedule o

Segment Information (Schedule of Revenues By Geographic Area Based On The Location of Customers) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 39,350	$ 36,193	$ 30,973
North America
Segment Reporting Information [Line Items]
Revenue	32,834	29,333	24,434
North America | United States
Segment Reporting Information [Line Items]
Revenue	31,982	28,578	23,519
North America | Other North America
Segment Reporting Information [Line Items]
Revenue	852	755	915
Europe
Segment Reporting Information [Line Items]
Revenue	2,808	2,772	2,558
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	1,670	2,252	2,011
Africa Middle East
Segment Reporting Information [Line Items]
Revenue	1,739	1,565	1,655
South America
Segment Reporting Information [Line Items]
Revenue	299	271	315
International Operations
Segment Reporting Information [Line Items]
Revenue	$ 4,400	$ 4,200	$ 3,700

Condensed Consolidating Finan_3

Condensed Consolidating Financial Statements (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019
Consolidating Financial Statements [Abstract]
Percentage of owned subsidiaries guaranteed fixed- and floating-rate notes	100.00%

Condensed Consolidating Finan_4

Condensed Consolidating Financial Statements (Condensed Consolidating Statement of Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Consolidating Financial Information [Line Items]
Revenue	$ 39,350	$ 36,193	$ 30,973
Cost of sales	(32,291)	(29,478)	(24,731)
G&A	(2,411)	(2,258)	(2,006)
Operating earnings	4,648	4,457	4,236
Interest, net	(460)	(356)	(103)
Other, net	14	(16)	(56)
Earnings from continuing operations before income tax	4,202	4,085	4,077
Provision for income tax, net	(718)	(727)	(1,165)
Discontinued operations, net of tax	0	(13)	0
Equity in net earnings of subsidiaries	0	0	0
Net earnings	3,484	3,345	2,912
Comprehensive income	3,043	3,025	3,479
Consolidating Adjustments
Condensed Consolidating Financial Information [Line Items]
Revenue	0	0	0
Cost of sales	0	0	0
G&A	0	0	0
Operating earnings	0	0	0
Interest, net	0	0	0
Other, net	0	0	0
Earnings from continuing operations before income tax	0	0	0
Provision for income tax, net	0	0	0
Discontinued operations, net of tax		0
Equity in net earnings of subsidiaries	(3,829)	(3,672)	(2,899)
Net earnings	(3,829)	(3,672)	(2,899)
Comprehensive income	(4,040)	(3,297)	(3,494)
Parent
Condensed Consolidating Financial Information [Line Items]
Revenue	0	0	0
Cost of sales	99	67	76
G&A	(75)	(90)	(48)
Operating earnings	24	(23)	28
Interest, net	(426)	(326)	(97)
Other, net	(60)	(81)	(72)
Earnings from continuing operations before income tax	(462)	(430)	(141)
Provision for income tax, net	117	116	154
Discontinued operations, net of tax		(13)
Equity in net earnings of subsidiaries	3,829	3,672	2,899
Net earnings	3,484	3,345	2,912
Comprehensive income	3,043	3,025	3,479
Guarantors on a Combined Basis
Condensed Consolidating Financial Information [Line Items]
Revenue	30,566	28,132	26,933
Cost of sales	(25,120)	(22,841)	(21,695)
G&A	(1,725)	(1,638)	(1,643)
Operating earnings	3,721	3,653	3,595
Interest, net	1	0	1
Other, net	15	12	12
Earnings from continuing operations before income tax	3,737	3,665	3,608
Provision for income tax, net	(626)	(677)	(1,262)
Discontinued operations, net of tax		0
Equity in net earnings of subsidiaries	0	0	0
Net earnings	3,111	2,988	2,346
Comprehensive income	3,083	2,992	2,336
Other Subsidiaries on a Combined Basis
Condensed Consolidating Financial Information [Line Items]
Revenue	8,784	8,061	4,040
Cost of sales	(7,270)	(6,704)	(3,112)
G&A	(611)	(530)	(315)
Operating earnings	903	827	613
Interest, net	(35)	(30)	(7)
Other, net	59	53	4
Earnings from continuing operations before income tax	927	850	610
Provision for income tax, net	(209)	(166)	(57)
Discontinued operations, net of tax		0
Equity in net earnings of subsidiaries	0	0	0
Net earnings	718	684	553
Comprehensive income	$ 957	$ 305	$ 1,158

Condensed Consolidating Finan_5

Condensed Consolidating Financial Statements (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2019		Dec. 31, 2018	Apr. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and equivalents	$ 902		$ 963
Accounts receivable	3,544		3,759
Unbilled receivables	7,857		6,576
Inventories	6,306		5,977
Other current assets	1,171		914
Total current assets	19,780		18,189
Noncurrent assets:
PP&E	9,761		8,972
Accumulated depreciation of PP&E	(5,286)		(4,994)
Intangible assets, net	2,315		2,585
Goodwill	19,677		19,594	$ 11,955	$ 11,914
Other assets	2,594		1,062
Net investment in subsidiaries	0		0
Total noncurrent assets	29,061		27,219
Total assets	48,841		45,408		35,046
Current liabilities:
Short-term debt and current portion of long-term debt	2,920		973
Customer advances and deposits	7,148		7,270
Other current liabilities	6,733		6,496
Total current liabilities	16,801		14,739
Noncurrent liabilities:
Long-term debt	9,010		11,444
Other liabilities	9,453		7,493
Total noncurrent liabilities	18,463		18,937
Total shareholders’ equity	13,577		11,732		$ 11,435	$ 10,301
Total liabilities and shareholders’ equity	48,841		45,408
Consolidating Adjustments
Current assets:
Cash and equivalents	0		0
Accounts receivable	0		0
Unbilled receivables	0		0
Inventories	0		0
Other current assets	0		0
Total current assets	0		0
Noncurrent assets:
PP&E	0		0
Accumulated depreciation of PP&E	0		0
Intangible assets, net	0		0
Goodwill	0		0
Other assets	0		0
Net investment in subsidiaries	(29,693)		(27,887)
Total noncurrent assets	(29,693)		(27,887)
Total assets	(29,693)		(27,887)
Current liabilities:
Short-term debt and current portion of long-term debt	0		0
Customer advances and deposits	0		0
Other current liabilities	0		0
Total current liabilities	0		0
Noncurrent liabilities:
Long-term debt	0		0
Other liabilities	0		0
Total noncurrent liabilities	0		0
Total shareholders’ equity	(29,693)		(27,887)
Total liabilities and shareholders’ equity	(29,693)		(27,887)
Parent
Current assets:
Cash and equivalents	601	[1]	460
Accounts receivable	0	[1]	0
Unbilled receivables	0	[1]	0
Inventories	0	[1]	0
Other current assets	(300)	[1]	(251)
Total current assets	301	[1]	209
Noncurrent assets:
PP&E	346	[1]	273
Accumulated depreciation of PP&E	(91)	[1]	(83)
Intangible assets, net	0	[1]	0
Goodwill	0	[1]	0
Other assets	203	[1]	195
Net investment in subsidiaries	29,693	[1]	27,887
Total noncurrent assets	30,151	[1]	28,272
Total assets	30,452	[1]	28,481
Current liabilities:
Short-term debt and current portion of long-term debt	2,497	[1]	850
Customer advances and deposits	0	[1]	0
Other current liabilities	487	[1]	552
Total current liabilities	2,984	[1]	1,402
Noncurrent liabilities:
Long-term debt	8,928	[1]	11,398
Other liabilities	4,963	[1]	3,949
Total noncurrent liabilities	13,891	[1]	15,347
Total shareholders’ equity	13,577	[1]	11,732
Total liabilities and shareholders’ equity	30,452	[1]	28,481
Guarantors on a Combined Basis
Current assets:
Cash and equivalents	0		0
Accounts receivable	1,188		1,171
Unbilled receivables	2,826		2,758
Inventories	6,191		5,855
Other current assets	989		647
Total current assets	11,194		10,431
Noncurrent assets:
PP&E	7,741		7,177
Accumulated depreciation of PP&E	(4,260)		(4,071)
Intangible assets, net	210		251
Goodwill	7,960		8,031
Other assets	1,278		274
Net investment in subsidiaries	0		0
Total noncurrent assets	12,929		11,662
Total assets	24,123		22,093
Current liabilities:
Short-term debt and current portion of long-term debt	2		0
Customer advances and deposits	4,174		4,541
Other current liabilities	4,391		3,944
Total current liabilities	8,567		8,485
Noncurrent liabilities:
Long-term debt	67		39
Other liabilities	2,995		2,115
Total noncurrent liabilities	3,062		2,154
Total shareholders’ equity	12,494		11,454
Total liabilities and shareholders’ equity	24,123		22,093
Other Subsidiaries on a Combined Basis
Current assets:
Cash and equivalents	301		503
Accounts receivable	2,356		2,588
Unbilled receivables	5,031		3,818
Inventories	115		122
Other current assets	482		518
Total current assets	8,285		7,549
Noncurrent assets:
PP&E	1,674		1,522
Accumulated depreciation of PP&E	(935)		(840)
Intangible assets, net	2,105		2,334
Goodwill	11,717		11,563
Other assets	1,113		593
Net investment in subsidiaries	0		0
Total noncurrent assets	15,674		15,172
Total assets	23,959		22,721
Current liabilities:
Short-term debt and current portion of long-term debt	421		123
Customer advances and deposits	2,974		2,729
Other current liabilities	1,855		2,000
Total current liabilities	5,250		4,852
Noncurrent liabilities:
Long-term debt	15		7
Other liabilities	1,495		1,429
Total noncurrent liabilities	1,510		1,436
Total shareholders’ equity	17,199		16,433
Total liabilities and shareholders’ equity	$ 23,959		$ 22,721
[1]	Includes the funded status of the company’s primary domestic qualified defined-benefit pension plans as the Parent has the ultimate obligation for the plans.

Condensed Consolidating Finan_6

Condensed Consolidating Financial Statements (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	[1]	$ 2,981	$ 3,148	$ 3,876
Cash flows from investing activities:
Business acquisitions, net of cash acquired		(19)	(10,099)	(399)
Capital expenditures		(987)	(690)	(428)
Proceeds from sales of assets		14	562	50
Other, net		(7)	(7)	39
Net cash used by investing activities		(994)	(10,234)	(788)
Cash flows from financing activities:
Proceeds from notes		0	6,461	985
Purchases of common stock		(231)	(1,769)	(1,558)
Dividends paid		(1,152)	(1,075)	(986)
Repayment of fixed-rate notes		0	0	(900)
(Repayments of) proceeds from commercial paper, net		(850)	850	0
Repayment of CSRA accounts receivable purchase agreement		0	(450)	0
Amortization of intangible and finance lease right-of-use assets		363	327	79
Other, net		236	69	60
Net cash (used) provided by financing activities		(1,997)	5,086	(2,399)
Net cash used by discontinued operations		(51)	(20)	(40)
Cash sweep/funding by parent		0	0	0
Net (decrease) increase in cash and equivalents		(61)	(2,020)	649
Cash and equivalents at beginning of year		963	2,983	2,334
Cash and equivalents at end of year		902	963	2,983
LIBOR
Cash flows from financing activities:
Proceeds from notes		0	1,000	0
Consolidating Adjustments
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	[1]	0	0	0
Cash flows from investing activities:
Business acquisitions, net of cash acquired			0	0
Capital expenditures		0	0	0
Proceeds from sales of assets			0
Other, net		0	0	0
Net cash used by investing activities		0	0	0
Cash flows from financing activities:
Proceeds from notes			0	0
Purchases of common stock		0	0	0
Dividends paid		0	0	0
Repayment of fixed-rate notes				0
(Repayments of) proceeds from commercial paper, net		0	0
Repayment of CSRA accounts receivable purchase agreement			0
Other, net		0	0	0
Net cash (used) provided by financing activities		0	0	0
Net cash used by discontinued operations		0	0	0
Cash sweep/funding by parent		0	0	0
Net (decrease) increase in cash and equivalents		0	0	0
Cash and equivalents at beginning of year		0	0	0
Cash and equivalents at end of year		0	0	0
Consolidating Adjustments | LIBOR
Cash flows from financing activities:
Proceeds from notes			0
Parent
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	[1]	(46)	(579)	312
Cash flows from investing activities:
Business acquisitions, net of cash acquired			(9,749)	0
Capital expenditures		(68)	(51)	(26)
Proceeds from sales of assets			90
Other, net		7	4	10
Net cash used by investing activities		(61)	(9,706)	(16)
Cash flows from financing activities:
Proceeds from notes			6,461	985
Purchases of common stock		(231)	(1,769)	(1,558)
Dividends paid		(1,152)	(1,075)	(986)
Repayment of fixed-rate notes				(900)
(Repayments of) proceeds from commercial paper, net		(850)	850
Repayment of CSRA accounts receivable purchase agreement			0
Other, net		24	3	63
Net cash (used) provided by financing activities		(2,209)	5,470	(2,396)
Net cash used by discontinued operations		(51)	(20)	(40)
Cash sweep/funding by parent		2,508	3,365	2,816
Net (decrease) increase in cash and equivalents		141	(1,470)	676
Cash and equivalents at beginning of year		460	1,930	1,254
Cash and equivalents at end of year		601	460	1,930
Parent | LIBOR
Cash flows from financing activities:
Proceeds from notes			1,000
Guarantors on a Combined Basis
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	[1]	2,918	2,954	2,371
Cash flows from investing activities:
Business acquisitions, net of cash acquired			(74)	(350)
Capital expenditures		(718)	(513)	(330)
Proceeds from sales of assets			472
Other, net		10	(12)	31
Net cash used by investing activities		(708)	(127)	(649)
Cash flows from financing activities:
Proceeds from notes			0	0
Purchases of common stock		0	0	0
Dividends paid		0	0	0
Repayment of fixed-rate notes				0
(Repayments of) proceeds from commercial paper, net		0	0
Repayment of CSRA accounts receivable purchase agreement			0
Other, net		(2)	35	(3)
Net cash (used) provided by financing activities		(2)	35	(3)
Net cash used by discontinued operations		0	0	0
Cash sweep/funding by parent		(2,208)	(2,862)	(1,719)
Net (decrease) increase in cash and equivalents		0	0	0
Cash and equivalents at beginning of year		0	0	0
Cash and equivalents at end of year		0	0	0
Guarantors on a Combined Basis | LIBOR
Cash flows from financing activities:
Proceeds from notes			0
Other Subsidiaries on a Combined Basis
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	[1]	109	773	1,193
Cash flows from investing activities:
Business acquisitions, net of cash acquired			(276)	(49)
Capital expenditures		(201)	(126)	(72)
Proceeds from sales of assets			0
Other, net		(24)	1	(2)
Net cash used by investing activities		(225)	(401)	(123)
Cash flows from financing activities:
Proceeds from notes			0	0
Purchases of common stock		0	0	0
Dividends paid		0	0	0
Repayment of fixed-rate notes				0
(Repayments of) proceeds from commercial paper, net		0	0
Repayment of CSRA accounts receivable purchase agreement			(450)
Other, net		214	31	0
Net cash (used) provided by financing activities		214	(419)	0
Net cash used by discontinued operations		0	0	0
Cash sweep/funding by parent		(300)	(503)	(1,097)
Net (decrease) increase in cash and equivalents		(202)	(550)	(27)
Cash and equivalents at beginning of year		503	1,053	1,080
Cash and equivalents at end of year		$ 301	503	$ 1,053
Other Subsidiaries on a Combined Basis | LIBOR
Cash flows from financing activities:
Proceeds from notes			$ 0
[1]	* Continuing operations only.

Uncategorized Items - gd-201912

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 0	[1]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(3,000,000)	[2]
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(638,000,000)	[1]
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(3,000,000)	[2]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 638,000,000	[1]
[1]	Reflects the cumulative effects of ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which we adopted on January 1, 2018.
[2]	Reflects the cumulative effect of Accounting Standards Update (ASU) 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory, which we adopted on January 1, 2017.