General Dynamics (GD) 10-Q25 Apr 182018 Q1 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information	3 Months Ended
Document and Entity Information	Apr. 01, 2018shares
Document and Entity Information [Abstract]
Entity Registrant Name	GENERAL DYNAMICS CORPORATION
Entity Central Index Key	40,533
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Apr. 1, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding	297,033,427
Trading Symbol	GD

Consolidated Statement of Earni

Consolidated Statement of Earnings (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Revenue:
Products	$ 4,576	$ 4,467
Services	2,959	2,974
Revenue, total	7,535	7,441
Operating costs and expenses:
Products	3,546	3,438
Services	2,444	2,485
General and administrative (G&A)	537	472
Operating costs and expenses, total	6,527	6,395
Operating earnings	1,008	1,046
Interest, net	(27)	(25)
Other, net	(21)	(11)
Earnings before income tax	960	1,010
Provision for income tax, net	161	247
Net earnings	$ 799	$ 763
Basic:
Continuing operations	$ 2.70	$ 2.53
Diluted:
Continuing operations	$ 2.65	$ 2.48

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 799	$ 763
(Losses) gains on cash flow hedges	(3)	13
Unrealized gains on marketable securities	0	5
Foreign currency translation adjustments	1	82
Change in retirement plans’ funded status	84	69
Other comprehensive income, pretax	82	169
Provision for income tax, net	15	44
Other comprehensive income, net of tax	67	125
Comprehensive income	$ 866	$ 888

Consolidated Balance Sheet (Una

Consolidated Balance Sheet (Unaudited) - USD ($) $ in Millions		Apr. 01, 2018	Dec. 31, 2017
Current assets:
Cash and equivalents		$ 4,332	$ 2,983
Accounts receivable		3,769	3,617
Unbilled receivables		5,865	5,240
Inventories		5,543	5,303
Other current assets		955	1,185
Total current assets		20,464	18,328
Noncurrent assets:
Property, plant and equipment, net		3,533	3,517
Intangible assets, net		702	702
Goodwill	[1]	11,955	11,914
Other assets		565	585
Total noncurrent assets		16,755	16,718
Total assets		37,219	35,046
Current liabilities:
Short-term debt and current portion of long-term debt		2,498	2
Accounts payable		2,851	3,207
Customer advances and deposits		7,095	6,992
Other current liabilities		2,798	2,898
Total current liabilities		15,242	13,099
Noncurrent liabilities:
Long-term debt		3,981	3,980
Other liabilities		6,222	6,532
Commitments and contingencies
Total noncurrent liabilities		10,203	10,512
Shareholders’ equity:
Common stock		482	482
Surplus		2,820	2,872
Retained earnings		27,605	26,444
Treasury stock		(15,742)	(15,543)
Accumulated other comprehensive loss		(3,391)	(2,820)
Total shareholders’ equity		11,774	11,435
Total liabilities and shareholders’ equity		$ 37,219	$ 35,046

[1]	Goodwill in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses.

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Apr. 01, 2018	Apr. 02, 2017
Cash flows from operating activities - continuing operations:
Net earnings		$ 799	$ 763
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of property, plant and equipment		89	92
Amortization of intangible assets		20	19
Equity-based compensation expense		29	23
Deferred income tax provision		4	45
(Increase) decrease in assets, net of effects of business acquisitions:
Accounts receivable		(150)	(84)
Unbilled receivables		(608)	(338)
Inventories		(236)	2
Increase (decrease) in liabilities, net of effects of business acquisitions:
Accounts payable		(358)	(72)
Customer advances and deposits		(149)	(95)
Income taxes payable		167	202
Other current liabilities		(128)	(76)
Other, net		25	52
Net cash (used) provided by operating activities	[1]	(496)	533
Cash flows from investing activities:
Capital expenditures		(104)	(62)
Other, net		(1)	(23)
Net cash used by investing activities		(105)	(85)
Cash flows from financing activities:
Proceeds from commercial paper, net		2,494	0
Purchases of common stock		(267)	(354)
Dividends paid		(250)	(230)
Other, net		(25)	(22)
Net cash provided (used) by financing activities		1,952	(606)
Net cash used by discontinued operations		(2)	(8)
Net increase (decrease) in cash and equivalents		1,349	(166)
Cash and equivalents at beginning of period		2,983	2,334
Cash and equivalents at end of period		4,332	2,168
Supplemental cash flow information:
Income tax refunds, net		4	4
Interest payments		$ 21	$ 20

[1]	* Continuing operations only

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions		Total	Common Stock, Par	Common Stock, Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Cumulative-effect adjustments	[1]	$ (3)			$ (3)
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		763			763
Cash dividends declared		(254)			(254)
Equity-based awards		6		(57)		63
Shares purchased		(355)				(355)
Other comprehensive income		125					125
Ending balance at Apr. 02, 2017		10,583	482	2,762	25,049	(14,448)	(3,262)
Cumulative-effect adjustments		0			638		(638)
Beginning 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		799			799
Cash dividends declared		(276)			(276)
Equity-based awards		6		(52)		58
Shares purchased		(257)				(257)
Other comprehensive income		67					67
Ending balance at Apr. 01, 2018		$ 11,774	$ 482	$ 2,820	$ 27,605	$ (15,742)	$ (3,391)

[1]	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.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	3 Months Ended
Summary Of Significant Accounting Policies	Apr. 01, 2018
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Consolidation and Classification. The unaudited Consolidated Financial Statements include the accounts of General Dynamics Corporation and our wholly owned and majority-owned subsidiaries. We eliminate all inter-company balances and transactions in the unaudited Consolidated Financial Statements. Some prior-year amounts have been reclassified among financial statement accounts or disclosures to conform to the current-year presentation. Consistent with industry practice, we classify assets and liabilities related to long-term contracts as current, even though some of these amounts may not be realized within one year. Further discussion of our significant accounting policies is contained in the other notes to these financial statements. Interim Financial Statements. The unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. These rules and regulations permit some of the information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) to be condensed or omitted. Our fiscal quarters are 13 weeks in length. Because our fiscal year ends on December 31, the number of days in our first and fourth quarters varies slightly from year to year. Operating results for the three-month period ended April 1, 2018 , are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 . The unaudited Consolidated Financial Statements contain all adjustments that are of a normal recurring nature necessary for a fair presentation of our results of operations and financial condition for the three-month periods ended April 1, 2018 , and April 2, 2017 . These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2017 . Accounting Standards Updates . On January 1, 2018, we adopted the following accounting standards issued by the Financial Accounting Standards Board (FASB): • ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. Specific to our business, ASU 2016-01 requires equity investments to be measured at fair value with changes in fair value recognized in net income. The ASU eliminates the available-for-sale classification for equity investments that recognized changes in fair value as a component of other comprehensive income. We adopted the standard on a modified retrospective basis on January 1, 2018, and recognized the cumulative effect as a $24 increase to retained earnings on the date of adoption. • ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 is intended to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified in the Consolidated Statement of Cash Flows by providing guidance on eight specific cash flow issues. We adopted the standard retrospectively on January 1, 2018. The adoption of the ASU did not have an effect on our cash flows for the three-month period ended April 2, 2017 . • ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. ASU 2017-07 requires the service cost component of net benefit cost to be reported separately from the other components of net benefit cost in the income statement. We adopted the standard retrospectively on January 1, 2018. Our restated operating earnings increased $11 for the three-month period ended April 2, 2017 , due to the reclassification of the non-service cost components of net benefit cost, and other income decreased by the same amount, with no impact to net earnings. • ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. ASU 2018-02 allows the reclassification from accumulated other comprehensive income to retained earnings of stranded tax effects resulting from the implementation of the Tax Cuts and Jobs Act (tax reform) enacted on December 22, 2017. We adopted the standard on January 1, 2018, and recognized a $614 increase to retained earnings on the date of adoption. For a discussion of other accounting standards that have been issued by the FASB but are not yet effective, refer to the Accounting Standards Updates section in our Annual Report on Form 10-K for the year ended December 31, 2017 .

Subsequent Events

Subsequent Events	3 Months Ended
Subsequent Events	Apr. 01, 2018
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On April 3, 2018 , we completed our acquisition of CSRA Inc. (CSRA) for $41.25 per share in cash. The aggregate amount of consideration paid, including amounts to repay CSRA’s due and payable debt and cash out outstanding stock options and restricted stock units of CSRA, was approximately $9.7 billion . This amount was funded by a combination of available cash on hand, a borrowing of $7.5 billion under the 364 -day credit facility further described in Note J and proceeds from commercial paper issuances. In addition, approximately $450 was paid to satisfy obligations under CSRA’s accounts receivable purchase agreement. CSRA is now part of General Dynamics Information Technology (GDIT) in our Information Systems and Technology group. The combination of GDIT and CSRA creates a premier provider of high-tech IT solutions to the government IT market. The disclosures required by Accounting Standards Codification (ASC) Topic 805 are not included in this Form 10-Q because the initial accounting for the business combination is incomplete. Additionally, on April 11, 2018 , we announced that we had entered into a binding agreement to acquire Hawker Pacific, a leading provider of integrated aviation solutions across Asia Pacific and the Middle East, for $250 . The transaction is subject to customary closing conditions, and is expected to be completed in the second quarter of 2018.

Acquisitions and Divestitures,

Acquisitions and Divestitures, Goodwill and Intangible Assets	3 Months Ended
	Apr. 01, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Acquisitions and Divestitures, Goodwill and Intangible Assets	ACQUISITIONS AND DIVESTITURES, GOODWILL, AND INTANGIBLE ASSETS Acquisitions and Divestitures. In the first quarter of 2018 , we acquired a provider of specialized transmitters and receivers in our Information Systems and Technology group. In 2017 , we acquired four businesses for an aggregate of $399 : a fixed-base operation (FBO) in our Aerospace group; and a manufacturer of electronics and communications products, a provider of mission-critical support services, and a manufacturer of signal distribution products in our Information Systems and Technology group. As the purchase prices of these acquisitions were not material for the three-month periods ended April 1, 2018 , and April 2, 2017 , they are included in other investing activities, net, in the unaudited Consolidated Statement of Cash Flows. 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 the first quarter of 2018 , we completed the sale of a commercial health products business in our Information Systems and Technology group. The proceeds from the sale are included in other investing activities, net, in the unaudited Consolidated Statement of Cash Flows. Goodwill. The changes in the carrying amount of goodwill by reporting unit were as follows: Aerospace Combat Systems Information Systems and Technology 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 (a) Goodwill in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses. (b) Includes adjustments during the purchase price allocation period and an allocation of goodwill associated with the sale of the commercial health products business discussed above. (c) Consists primarily of adjustments for foreign currency translation. Intangible Assets. Intangible assets consisted of the following: Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount April 1, 2018 December 31, 2017 Contract and program intangible assets (b) $ 1,665 $ (1,318 ) $ 347 $ 1,684 $ (1,320 ) $ 364 Trade names and trademarks 477 (168 ) 309 465 (160 ) 305 Technology and software 154 (109 ) 45 137 (105 ) 32 Other intangible assets 155 (154 ) 1 155 (154 ) 1 Total intangible assets $ 2,451 $ (1,749 ) $ 702 $ 2,441 $ (1,739 ) $ 702 (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. Amortization expense was $20 and $19 for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively.

Revenue

Revenue	3 Months Ended
Revenue	Apr. 01, 2018
Revenue Recognition [Abstract]
Revenue	REVENUE The majority of our revenue is derived from long-term contracts and programs that can span several years. We account for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers. 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 in ASC Topic 606. A contract’s transaction price is allocated to each distinct performance obligation 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% and 70% of our revenue for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. Substantially all of our revenue in the defense groups 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% and 30% of our revenue for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. The majority of our revenue recognized at a point in time is for the manufacture of business-jet aircraft in our Aerospace group. 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 April 1, 2018 , we had $62.1 billion of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 60% of our remaining performance obligations as revenue by 2019, an additional 25% by 2021 and the balance thereafter. On December 31, 2017 , we had $63.2 billion of remaining performance obligations, and on December 31, 2017 , we expected to recognize approximately 40% of these remaining performance obligations as revenue in 2018, an additional 40% by 2020 and the balance thereafter. Contract Estimates. Accounting for long-term contracts and programs involves the use of various techniques to estimate total contract revenue and costs. For long-term contracts, we estimate the profit on a contract as the difference between the total estimated revenue and expected costs to complete a contract and recognize that profit over the life of the contract. Contract estimates are based on various assumptions to project the outcome of future events that often span several years. These assumptions include labor productivity and availability; the complexity of the work to be performed; the cost and availability of materials; the performance of subcontractors; and the availability and timing of funding from the customer. The nature of our contracts gives rise to several types of variable consideration, including claims and award and incentive fees. We include in our contract estimates additional revenue for submitted contract modifications or claims against the customer when we believe we have an enforceable right to the modification or claim, the amount can be estimated reliably and its realization is probable. In evaluating these criteria, we consider the contractual/legal basis for the claim, the cause of any additional costs incurred, the reasonableness of those costs and the objective evidence available to support the claim. We include award or incentive fees in the estimated transaction price when there is a basis to reasonably estimate the amount of the fee. These estimates are based on historical award experience, anticipated performance and our best judgment at the time. Because of our certainty in estimating these amounts, they are included in the transaction price of our contracts and the associated remaining performance obligations. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up method. Under this method, the impact of the adjustment on profit recorded to date on a contract is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance are recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the period it is identified. The impact of adjustments in contract estimates on our operating earnings can be reflected in either operating costs and expenses or revenue. The aggregate impact of adjustments in contract estimates increased our revenue, operating earnings and diluted earnings per share as follows: Three Months Ended April 1, 2018 April 2, 2017 Revenue $ 115 $ 72 Operating earnings 97 50 Diluted earnings per share $ 0.25 $ 0.11 No adjustment on any one contract was material to the unaudited Consolidated Financial Statements for the three-month periods ended April 1, 2018 , or April 2, 2017 . Revenue by Category. Our portfolio of products and services consists of almost 10,000 active contracts. The following series of tables presents our revenue disaggregated by several categories. Revenue by major products and services was as follows: Three Months Ended April 1, 2018 April 2, 2017 Aircraft manufacturing, outfitting and completions $ 1,366 $ 1,629 Aircraft services 451 435 Pre-owned aircraft 8 10 Total Aerospace 1,825 2,074 Wheeled combat and tactical vehicles 625 560 Weapons systems, armament and munitions 383 346 Tanks and tracked vehicles 331 247 Engineering and other services 101 134 Total Combat Systems 1,440 1,287 C4ISR* solutions 1,098 1,088 Information technology (IT) services 1,138 1,058 Total Information Systems and Technology 2,236 2,146 Nuclear-powered submarines 1,296 1,204 Surface combatants 265 247 Auxiliary and commercial ships 218 143 Repair and other services 255 340 Total Marine Systems 2,034 1,934 Total revenue $ 7,535 $ 7,441 * Command, control, communications, computers, intelligence, surveillance and reconnaissance. Revenue by contract type was as follows: Three Months Ended April 1, 2018 Aerospace Combat Systems Information Systems and Technology Marine Systems Total Revenue Fixed-price $ 1,668 $ 1,253 $ 1,007 $ 1,305 $ 5,233 Cost-reimbursement — 179 1,017 728 1,924 Time-and-materials 157 8 212 1 378 Total revenue $ 1,825 $ 1,440 $ 2,236 $ 2,034 $ 7,535 Three Months Ended April 2, 2017 Fixed-price $ 1,902 $ 1,073 $ 930 $ 1,130 $ 5,035 Cost-reimbursement — 207 1,010 801 2,018 Time-and-materials 172 7 206 3 388 Total revenue $ 2,074 $ 1,287 $ 2,146 $ 1,934 $ 7,441 Each of these contract types presents advantages and disadvantages. Typically, we assume more risk with fixed-price contracts. However, these types of contracts offer additional profits when we complete the work for less than originally estimated. Cost-reimbursement contracts generally subject us to lower risk. Accordingly, the associated base fees are usually lower than fees earned on fixed-price contracts. Under time-and-materials contracts, our profit may vary if actual labor-hour rates vary significantly from the negotiated rates. Also, because these contracts can provide little or no fee for managing material costs, the content mix can impact profitability. Revenue by customer was as follows: Three Months Ended April 1, 2018 Aerospace Combat Systems Information Systems and Technology Marine Systems Total Revenue U.S. government: Department of Defense (DoD) $ 41 $ 607 $ 1,175 $ 1,950 $ 3,773 Non-DoD — 1 755 — 756 Foreign Military Sales (FMS) 16 69 15 29 129 Total U.S. government 57 677 1,945 1,979 4,658 U.S. commercial 842 58 67 53 1,020 Non-U.S. government 10 697 173 2 882 Non-U.S. commercial 916 8 51 — 975 Total revenue $ 1,825 $ 1,440 $ 2,236 $ 2,034 $ 7,535 Three Months Ended April 2, 2017 U.S. government: DoD $ 40 $ 609 $ 1,142 $ 1,837 $ 3,628 Non-DoD — 2 698 — 700 FMS 9 108 12 58 187 Total U.S. government 49 719 1,852 1,895 4,515 U.S. commercial 936 61 89 33 1,119 Non-U.S. government 5 502 176 4 687 Non-U.S. commercial 1,084 5 29 2 1,120 Total revenue $ 2,074 $ 1,287 $ 2,146 $ 1,934 $ 7,441 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 groups, 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 group, 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 three-month period ended April 1, 2018 , were not materially impacted by any other factors. Revenue recognized in the three-month periods ended April 1, 2018 , and April 2, 2017 , that was included in the contract liability balance at the beginning of each year was $1.5 billion and $1.7 billion , respectively. This revenue represented primarily the sale of business-jet aircraft.

Earnings Per Share

Earnings Per Share	3 Months Ended
Earnings Per Share	Apr. 01, 2018
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 2018 and 2017 due to share repurchases. See Note L 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): Three Months Ended April 1, 2018 April 2, 2017 Basic weighted average shares outstanding 296,399 301,771 Dilutive effect of stock options and restricted stock/RSUs* 4,705 5,511 Diluted weighted average shares outstanding 301,104 307,282 * Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the period and, therefore, the effect of including these options would be antidilutive. These options totaled 517 and 681 for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively.

Fair Value

Fair Value	3 Months Ended
Fair Value	Apr. 01, 2018
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 April 1, 2018 , or December 31, 2017 . Our financial instruments include cash and equivalents, accounts receivable and payable, marketable securities held in trust and other investments, short- and long-term debt, and derivative financial instruments. The carrying values of cash and equivalents and accounts receivable and payable on the unaudited Consolidated Balance Sheet approximate their fair value. The following tables present the fair values of our other financial assets and liabilities on April 1, 2018 , and December 31, 2017 , 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) April 1, 2018 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 6 $ 6 $ 2 $ 4 $ — Available-for-sale debt securities 130 130 — 130 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges (107 ) (107 ) — (107 ) — Measured at amortized cost: Short- and long-term debt principal (6,532 ) (6,356 ) — (6,356 ) — December 31, 2017 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 20 $ 20 $ 15 $ 5 $ — Available-for-sale debt securities 117 117 — 117 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges (105 ) (105 ) — (105 ) — Measured at amortized cost: Short- and long-term debt principal (4,032 ) (3,974 ) — (3,974 ) — 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	3 Months Ended
Income Taxes	Apr. 01, 2018
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. Tax reform was enacted on December 22, 2017, and has several key provisions impacting 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. Net Deferred Tax Liability. Our deferred tax assets and liabilities are included in other noncurrent assets and liabilities on the Consolidated Balance Sheet. Our net deferred tax liability consisted of the following: April 1, 2018 December 31, 2017 Deferred tax asset $ 60 $ 75 Deferred tax liability (249 ) (244 ) Net deferred tax liability $ (189 ) $ (169 ) Tax Uncertainties. 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. The total amount of these tax liabilities on April 1, 2018 , was not material to our results of operations, financial condition or cash flows. We participate in the Internal Revenue Service (IRS) Compliance Assurance Process (CAP), a real-time audit of our consolidated federal corporate income tax return. The IRS has examined our consolidated federal income tax returns through 2016. We do not expect the resolution of tax matters for open years to have a material impact on our results of operations, financial condition, cash flows or effective tax rate. Based on all known facts and circumstances and current tax law, we believe the total amount of any unrecognized tax benefits on April 1, 2018 , was not material to our results of operations, financial condition or cash flows, and if recognized, would not have a material impact on our effective tax rate. In addition, there are no tax positions for which it is reasonably possible that the unrecognized tax benefits will vary significantly over the next 12 months, producing, individually or in the aggregate, a material effect on our results of operations, financial condition or cash flows.

Unbilled Receivables

Unbilled Receivables	3 Months Ended
Unbilled Receivables	Apr. 01, 2018
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 or upon achievement of contractual milestones. Unbilled receivables consisted of the following: April 1, 2018 December 31, 2017 Unbilled revenue $ 22,928 $ 21,845 Advances and progress billings (17,063 ) (16,605 ) Net unbilled receivables $ 5,865 $ 5,240 The increase in net unbilled receivables during the three-month period ended April 1, 2018 , was due primarily to the timing of billings on large international vehicle contracts in our Combat Systems group.

Inventories

Inventories	3 Months Ended
Inventories	Apr. 01, 2018
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: April 1, 2018 December 31, 2017 Work in process $ 4,138 $ 3,872 Raw materials 1,328 1,357 Finished goods 52 51 Pre-owned aircraft 25 23 Total inventories $ 5,543 $ 5,303

Debt

Debt	3 Months Ended
Debt	Apr. 01, 2018
Debt Disclosure [Abstract]
Debt	DEBT Debt consisted of the following: April 1, 2018 December 31, 2017 Fixed-rate notes due: Interest rate: July 2021 3.875% $ 500 $ 500 November 2022 2.250% 1,000 1,000 August 2023 1.875% 500 500 November 2024 2.375% 500 500 August 2026 2.125% 500 500 November 2027 2.625% 500 500 November 2042 3.600% 500 500 Commercial paper 2.097% 2,500 — Other Various 32 32 Total debt principal 6,532 4,032 Less unamortized debt issuance costs and discounts 53 50 Total debt 6,479 3,982 Less current portion 2,498 2 Long-term debt $ 3,981 $ 3,980 In the first quarter of 2018, we renewed and increased to $2 billion our $1 billion multi-year committed bank credit facility, which was scheduled to expire in July 2018 . The new credit facility expires in March 2023 . We have an additional $1 billion multi-year committed bank credit facility that expires in November 2020 . We may renew or replace these credit facilities in whole or in part at or prior to their expiration dates. Also in the first quarter of 2018, we entered into a $7.5 billion , 364 -day committed bank credit facility that expires in March 2019 . We financed the acquisition of CSRA, in part, by borrowing $7.5 billion under t his facility subsequent to the end of the quarter. W e intend to issue debt securities in the future to repay in whole or in part the borrowings under this facility. The proceeds from these issuances will automatically reduce the bank ’ s commitments under this facility to an amount not less than $2 billion . Following this reduction, our three credit facilities will total $5 billion . Our credit facilities are used for general corporate purposes and working capital needs and support our commercial paper issuances. Our credit facilities are guaranteed by several of our 100% -owned subsidiaries. On April 1, 2018 , $2.5 billion of commercial paper had been issued and remained outstanding with a dollar-weighted average interest rate of 2.097% and original maturities of less than 90 days. Our fixed-rate notes are fully and unconditionally guaranteed by several of our 100% -owned subsidiaries. See Note Q for condensed consolidating financial statements. We have the option to redeem the notes prior to their maturity in whole or in part for the principal plus any accrued but unpaid interest and applicable make-whole amounts. Our financing arrangements contain a number of customary covenants and restrictions. We were in compliance with all covenants and restrictions on April 1, 2018 .

Other Liabilities

Other Liabilities	3 Months Ended
Other Liabilities	Apr. 01, 2018
Other Liabilities Disclosure [Abstract]
Other Liabilities	OTHER LIABILITIES A summary of significant other liabilities by balance sheet caption follows: April 1, 2018 December 31, 2017 Salaries and wages $ 665 $ 786 Workers’ compensation 320 320 Retirement benefits 292 295 Fair value of cash flow hedges 201 180 Other (a) 1,320 1,317 Total other current liabilities $ 2,798 $ 2,898 Retirement benefits $ 4,359 $ 4,408 Customer deposits on commercial contracts 555 814 Deferred income taxes 249 244 Other (b) 1,059 1,066 Total other liabilities $ 6,222 $ 6,532 (a) Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace group, liabilities of discontinued operations, and insurance-related costs. (b) Consists primarily of warranty reserves, workers’ compensation liabilities and liabilities of discontinued operations.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
Shareholders' Equity	Apr. 01, 2018
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS ’ EQUITY Share Repurchases. Our board of directors authorizes management’s repurchase of outstanding shares of our common stock on the open market from time to time. On March 1, 2017, the board of directors authorized management to repurchase up to 10 million additional shares of the company’s outstanding stock. In the three -month period ended April 1, 2018 , we repurchased 1.2 million of our outstanding shares for $257 . On April 1, 2018 , 6.4 million shares remained authorized by our board of directors for repurchase, approximately 2% of our total shares outstanding. We repurchased 1.9 million shares for $355 in the three -month period ended April 2, 2017 . Dividends per Share. Dividends declared per share were $0.93 and $0.84 for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. Cash dividends paid were $250 and $230 for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. Accumulated Other Comprehensive Loss. The changes, pretax and net of tax, in each component of accumulated other comprehensive loss (AOCL) consisted of the following: Losses on Cash Flow Hedges Unrealized Gains on Marketable Securities Foreign Currency Translation Adjustments Changes in Retirement Plans’ Funded Status AOCL December 31, 2017 $ (94 ) $ 19 $ 402 $ (3,147 ) $ (2,820 ) Cumulative effect adjustments (see Note A) (4 ) (19 ) — (615 ) (638 ) Other comprehensive income, pretax (3 ) — 1 84 82 Provision for income tax, net (1 ) — — 16 15 Other comprehensive income, net of tax (2 ) — 1 68 67 April 1, 2018 $ (100 ) $ — $ 403 $ (3,694 ) $ (3,391 ) December 31, 2016 $ (345 ) $ 14 $ 69 $ (3,125 ) $ (3,387 ) Other comprehensive income, pretax 13 5 82 69 169 Provision for income tax, net 4 1 15 24 44 Other comprehensive income, net of tax 9 4 67 45 125 April 2, 2017 $ (336 ) $ 18 $ 136 $ (3,080 ) $ (3,262 ) 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 $95 and $85 for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. This was offset partially by pretax amortization of prior service credit of $12 and $18 for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. These AOCL components are included in our net periodic pension and other post-retirement benefit cost. See Note O for additional details.

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	3 Months Ended
Derivative Instruments And Hedging Activities	Apr. 01, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative 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 had $4.3 billion in notional forward exchange contracts outstanding on April 1, 2018 , and December 31, 2017 . We do not use derivative financial instruments for trading or speculative purposes. We recognize derivative financial instruments on the Consolidated Balance Sheet at fair value. See Note F for additional details. Foreign Currency Risk and Hedging Activities. 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 three -year average maturity of these instruments generally matches the duration of the activities that are at risk. We record changes in the fair value of derivative financial instruments in operating costs and expenses in the Consolidated Statement of Earnings or in other comprehensive loss (OCL) within the Consolidated Statement of Comprehensive Income depending on whether the derivative is designated and qualifies for hedge accounting. Gains and losses related to derivative financial instruments that qualify as cash flow hedges are deferred in OCL until the underlying transaction is reflected in earnings. We adjust derivative financial instruments not designated as cash flow hedges to market value each period and record the gain or loss in the Consolidated Statement of Earnings. The gains and losses on these instruments generally offset losses and gains on the assets, liabilities and other transactions being hedged. Gains and losses resulting from hedge ineffectiveness are recognized in the Consolidated Statement of Earnings for all derivative financial instruments, regardless of designation. Net gains and losses on derivative financial instruments recognized in earnings, including gains and losses related to hedge ineffectiveness, were not material to our results of operations for the three-month periods ended April 1, 2018 , and April 2, 2017 . Net gains and losses reclassified to earnings from OCL were not material to our results of operations for the three-month periods ended April 1, 2018 , and April 2, 2017 , 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 April 1, 2018 , or December 31, 2017 . Interest Rate Risk. Our financial instruments subject to interest rate risk include fixed-rate long-term debt obligations and variable-rate commercial paper. However, the risk associated with these 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 April 1, 2018 , we held $4.3 billion 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 April 1, 2018 , and December 31, 2017 , these marketable securities totaled $190 and $191 , respectively, and were reflected at fair value on the unaudited Consolidated Balance Sheet in other current and noncurrent assets. 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 end-of-period exchange rates, and statements of earnings at average exchange rates for each period. The resulting foreign currency translation adjustments are a component of OCL. 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 for the three-month periods ended April 1, 2018 , and April 2, 2017 . In addition, the effect of changes in foreign exchange rates on non-U.S. cash balances was not material for the three -month periods ended April 1, 2018 , and April 2, 2017 .

Commitments And Contingencies

Commitments And Contingencies	3 Months Ended
Commitments And Contingencies	Apr. 01, 2018
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 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 has been engaged in discussions with the U.S. government. 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 $1.4 billion on April 1, 2018 . 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 group 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. 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. Product Warranties. We provide warranties to our customers associated with certain product sales. We record estimated warranty costs in the period in which the related products are delivered. The warranty liability recorded at each balance sheet date is based generally on the number of months of warranty coverage remaining for the products delivered and the average historical monthly warranty payments. Warranty obligations incurred in connection with long-term production contracts are accounted for within the contract estimates at completion. Our other warranty obligations, primarily for business-jet aircraft, are included in other current and noncurrent liabilities on the Consolidated Balance Sheet. The changes in the carrying amount of warranty liabilities for the three-month periods ended April 1, 2018 , and April 2, 2017 , were as follows: Three Months Ended April 1, 2018 April 2, 2017 Beginning balance $ 467 $ 474 Warranty expense 29 38 Payments (25 ) (24 ) Adjustments (3 ) — Ending balance $ 468 $ 488

Retirement Plans

Retirement Plans	3 Months Ended
Retirement Plans	Apr. 01, 2018
Retirement Benefits [Abstract]
Retirement Plans	RETIREMENT PLANS We provide defined-contribution benefits to eligible employees, as well as some remaining defined-benefit pension and other post-retirement benefits. Net periodic defined-benefit pension and other post-retirement benefit cost for the three-month periods ended April 1, 2018 , and April 2, 2017 , consisted of the following: Pension Benefits Other Post-retirement Benefits Three Months Ended April 1, 2018 April 2, 2017 April 1, 2018 April 2, 2017 Service cost $ 46 $ 42 $ 3 $ 3 Interest cost 114 113 8 8 Expected return on plan assets (179 ) (169 ) (9 ) (8 ) Recognized net actuarial loss (gain) 96 86 (1 ) (1 ) Amortization of prior service credit (11 ) (17 ) (1 ) (1 ) Net periodic benefit cost $ 66 $ 55 $ — $ 1 As discussed in Note A, the service cost component of net periodic benefit cost is reported separately from the other components of net periodic benefit cost in accordance with ASU 2017-07. 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 business groups. 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 recovery of the cost is considered probable based on our backlog and probable follow-on contracts, we defer the excess in other contract costs in other current assets on the Consolidated Balance Sheet until the cost is allocable to contracts. For other plans, the amount allocated to contracts and included in revenue has exceeded the plans’ cumulative benefit cost. We have similarly deferred recognition of these excess earnings on the Consolidated Balance Sheet. 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. In addition to our required contributions of approximately $315 in 2018, as we deploy additional cash resulting from the recent tax reform, we intend to make discretionary contributions, resulting in total pension plan contributions of approximately $550 in 2018.

Business Group Information

Business Group Information	3 Months Ended
Business Group Information	Apr. 01, 2018
Segment Reporting [Abstract]
Business Group Information	BUSINESS GROUP INFORMATION We operate in four business groups: Aerospace, Combat Systems, Information Systems and Technology, and Marine Systems. We organize our business groups in accordance with the nature of products and services offered. We measure each group’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 business groups. Summary financial information for each of our business groups follows: Revenue Operating Earnings Three Months Ended April 1, 2018 April 2, 2017 April 1, 2018 April 2, 2017 Aerospace $ 1,825 $ 2,074 $ 346 $ 439 Combat Systems 1,440 1,287 224 205 Information Systems and Technology 2,236 2,146 247 236 Marine Systems 2,034 1,934 184 161 Corporate — — 7 5 Total $ 7,535 $ 7,441 $ 1,008 $ 1,046 ASU 2017-07 requires the non-service cost components of pension and other post-retirement benefit cost (e.g., interest cost) to be reported in other income (expense) in the income statement. In our three defense groups, pension and other post-retirement benefit costs are allocable contract costs. For these groups, we report the offset for the non-service cost components in Corporate operating results. Stock option expense is also reported in Corporate operating results.

Condensed Consolidating Financi

Condensed Consolidating Financial Statements	3 Months Ended
Condensed Consolidating Financial Statements	Apr. 01, 2018
Consolidating Financial Statements [Abstract]
Condensed Consolidating Financial Statements	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS The fixed-rate notes described in Note J 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 (UNAUDITED) Three Months Ended April 1, 2018 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Revenue $ — $ 6,484 $ 1,051 $ — $ 7,535 Cost of sales (19 ) 5,202 807 — 5,990 G&A 13 436 88 — 537 Operating earnings 6 846 156 — 1,008 Interest, net (26 ) — (1 ) — (27 ) Other, net (24 ) 1 2 — (21 ) Earnings before income tax (44 ) 847 157 — 960 Provision for income tax, net (42 ) 165 38 — 161 Equity in net earnings of subsidiaries 801 — — (801 ) — Net earnings $ 799 $ 682 $ 119 $ (801 ) $ 799 Comprehensive income $ 866 $ 685 $ 137 $ (822 ) $ 866 Three Months Ended April 2, 2017 Revenue $ — $ 6,544 $ 897 $ — $ 7,441 Cost of sales (17 ) 5,252 688 — 5,923 G&A 10 386 76 — 472 Operating earnings 7 906 133 — 1,046 Interest, net (24 ) — (1 ) — (25 ) Other, net (15 ) 3 1 — (11 ) Earnings before income tax (32 ) 909 133 — 1,010 Provision for income tax, net (67 ) 293 21 — 247 Equity in net earnings of subsidiaries 728 — — (728 ) — Net earnings $ 763 $ 616 $ 112 $ (728 ) $ 763 Comprehensive income $ 888 $ 617 $ 207 $ (824 ) $ 888 CONDENSED CONSOLIDATING BALANCE SHEET (UNAUDITED) April 1, 2018 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 3,787 $ — $ 545 $ — $ 4,332 Accounts receivable — 1,215 2,554 — 3,769 Unbilled receivables — 2,757 3,108 — 5,865 Inventories — 5,441 102 — 5,543 Other current assets 113 453 389 — 955 Total current assets 3,900 9,866 6,698 — 20,464 Noncurrent assets: Property, plant and equipment (PP&E) 228 6,857 1,250 — 8,335 Accumulated depreciation of PP&E (77 ) (3,940 ) (785 ) — (4,802 ) Intangible assets, net — 285 417 — 702 Goodwill — 8,336 3,619 — 11,955 Other assets 188 229 148 — 565 Investment in subsidiaries 45,799 — — (45,799 ) — Total noncurrent assets 46,138 11,767 4,649 (45,799 ) 16,755 Total assets $ 50,038 $ 21,633 $ 11,347 $ (45,799 ) $ 37,219 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ 2,496 $ — $ 2 $ — $ 2,498 Customer advances and deposits — 4,273 2,822 — 7,095 Other current liabilities 559 3,417 1,673 — 5,649 Total current liabilities 3,055 7,690 4,497 — 15,242 Noncurrent liabilities: Long-term debt 3,952 20 9 — 3,981 Other liabilities 2,399 3,234 589 — 6,222 Total noncurrent liabilities 6,351 3,254 598 — 10,203 Intercompany 28,858 (28,093 ) (765 ) — — Shareholders’ equity: Common stock 482 6 2,126 (2,132 ) 482 Other shareholders’ equity 11,292 38,776 4,891 (43,667 ) 11,292 Total shareholders’ equity 11,774 38,782 7,017 (45,799 ) 11,774 Total liabilities and shareholders’ equity $ 50,038 $ 21,633 $ 11,347 $ (45,799 ) $ 37,219 CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2017 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 1,930 $ — $ 1,053 $ — $ 2,983 Accounts receivable — 1,259 2,358 — 3,617 Unbilled receivables — 2,547 2,693 — 5,240 Inventories — 5,216 87 — 5,303 Other current assets 351 461 373 — 1,185 Total current assets 2,281 9,483 6,564 — 18,328 Noncurrent assets: PP&E 221 6,779 1,237 — 8,237 Accumulated depreciation of PP&E (75 ) (3,869 ) (776 ) — (4,720 ) Intangible assets, net — 287 415 — 702 Goodwill — 8,320 3,594 — 11,914 Other assets 199 232 154 — 585 Investment in subsidiaries 44,887 — — (44,887 ) — Total noncurrent assets 45,232 11,749 4,624 (44,887 ) 16,718 Total assets $ 47,513 $ 21,232 $ 11,188 $ (44,887 ) $ 35,046 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ — $ 1 $ 1 $ — $ 2 Customer advances and deposits — 4,180 2,812 — 6,992 Other current liabilities 561 3,758 1,786 — 6,105 Total current liabilities 561 7,939 4,599 — 13,099 Noncurrent liabilities: Long-term debt 3,950 21 9 — 3,980 Other liabilities 2,451 3,473 608 — 6,532 Total noncurrent liabilities 6,401 3,494 617 — 10,512 Intercompany 29,116 (28,494 ) (622 ) — — Shareholders’ equity: Common stock 482 6 2,126 (2,132 ) 482 Other shareholders’ equity 10,953 38,287 4,468 (42,755 ) 10,953 Total shareholders’ equity 11,435 38,293 6,594 (44,887 ) 11,435 Total liabilities and shareholders’ equity $ 47,513 $ 21,232 $ 11,188 $ (44,887 ) $ 35,046 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS (UNAUDITED) Three Months Ended April 1, 2018 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Net cash (used) provided by operating activities* $ 80 $ 105 $ (681 ) $ — $ (496 ) Cash flows from investing activities: Capital expenditures (7 ) (86 ) (11 ) — (104 ) Other, net 1 (2 ) — — (1 ) Net cash used by investing activities (6 ) (88 ) (11 ) — (105 ) Cash flows from financing activities: Proceeds from commercial paper, net 2,494 — — — 2,494 Purchases of common stock (267 ) — — — (267 ) Dividends paid (250 ) — — — (250 ) Other, net (25 ) — — — (25 ) Net cash provided by financing activities 1,952 — — — 1,952 Net cash used by discontinued operations (2 ) — — — (2 ) Cash sweep/funding by parent (167 ) (17 ) 184 — — Net increase in cash and equivalents 1,857 — (508 ) — 1,349 Cash and equivalents at beginning of period 1,930 — 1,053 — 2,983 Cash and equivalents at end of period $ 3,787 $ — $ 545 $ — $ 4,332 Three Months Ended April 2, 2017 Net cash provided by operating activities* $ (10 ) $ 443 $ 100 $ — $ 533 Cash flows from investing activities: Capital expenditures (3 ) (42 ) (17 ) — (62 ) Other, net — 28 (51 ) — (23 ) Net cash used by investing activities (3 ) (14 ) (68 ) — (85 ) Cash flows from financing activities: Purchases of common stock (354 ) — — — (354 ) Dividends paid (230 ) — — — (230 ) Other, net (21 ) (1 ) — — (22 ) Net cash used by financing activities (605 ) (1 ) — — (606 ) Net cash used by discontinued operations (8 ) — — — (8 ) Cash sweep/funding by parent 423 (428 ) 5 — — Net decrease in cash and equivalents (203 ) — 37 — (166 ) Cash and equivalents at beginning of period 1,254 — 1,080 — 2,334 Cash and equivalents at end of period $ 1,051 $ — $ 1,117 $ — $ 2,168 * Continuing operations only.

Summary Of Significant Accoun24

Summary Of Significant Accounting Policies (Policies)	3 Months Ended
Summary Of Significant Accounting Policies (Policies)	Apr. 01, 2018
Accounting Policies [Abstract]
Basis of Consolidation and Classification	Basis of Consolidation and Classification. The unaudited Consolidated Financial Statements include the accounts of General Dynamics Corporation and our wholly owned and majority-owned subsidiaries. We eliminate all inter-company balances and transactions in the unaudited Consolidated Financial Statements. Some prior-year amounts have been reclassified among financial statement accounts or disclosures to conform to the current-year presentation. Consistent with industry practice, we classify assets and liabilities related to long-term contracts as current, even though some of these amounts may not be realized within one year.
Interim Financial Statements	Interim Financial Statements. The unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. These rules and regulations permit some of the information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) to be condensed or omitted. Our fiscal quarters are 13 weeks in length. Because our fiscal year ends on December 31, the number of days in our first and fourth quarters varies slightly from year to year. Operating results for the three-month period ended April 1, 2018 , are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 . The unaudited Consolidated Financial Statements contain all adjustments that are of a normal recurring nature necessary for a fair presentation of our results of operations and financial condition for the three-month periods ended April 1, 2018 , and April 2, 2017 . These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2017 .
Accounting Standards Updates	Accounting Standards Updates . On January 1, 2018, we adopted the following accounting standards issued by the Financial Accounting Standards Board (FASB): • ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. Specific to our business, ASU 2016-01 requires equity investments to be measured at fair value with changes in fair value recognized in net income. The ASU eliminates the available-for-sale classification for equity investments that recognized changes in fair value as a component of other comprehensive income. We adopted the standard on a modified retrospective basis on January 1, 2018, and recognized the cumulative effect as a $24 increase to retained earnings on the date of adoption. • ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 is intended to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified in the Consolidated Statement of Cash Flows by providing guidance on eight specific cash flow issues. We adopted the standard retrospectively on January 1, 2018. The adoption of the ASU did not have an effect on our cash flows for the three-month period ended April 2, 2017 . • ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. ASU 2017-07 requires the service cost component of net benefit cost to be reported separately from the other components of net benefit cost in the income statement. We adopted the standard retrospectively on January 1, 2018. Our restated operating earnings increased $11 for the three-month period ended April 2, 2017 , due to the reclassification of the non-service cost components of net benefit cost, and other income decreased by the same amount, with no impact to net earnings. • ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. ASU 2018-02 allows the reclassification from accumulated other comprehensive income to retained earnings of stranded tax effects resulting from the implementation of the Tax Cuts and Jobs Act (tax reform) enacted on December 22, 2017. We adopted the standard on January 1, 2018, and recognized a $614 increase to retained earnings on the date of adoption. For a discussion of other accounting standards that have been issued by the FASB but are not yet effective, refer to the Accounting Standards Updates section in our Annual Report on Form 10-K for the year ended December 31, 2017 .
Revenue Recognition	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 groups, 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 group, we generally receive deposits from customers upon contract execution and upon achievement of contractual milestones. These deposits are liquidated when revenue is recognized. The majority of our revenue is derived from long-term contracts and programs that can span several years. We account for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers. 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 in ASC Topic 606. A contract’s transaction price is allocated to each distinct performance obligation 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% and 70% of our revenue for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. Substantially all of our revenue in the defense groups 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% and 30% of our revenue for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively. The majority of our revenue recognized at a point in time is for the manufacture of business-jet aircraft in our Aerospace group. 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 April 1, 2018 , we had $62.1 billion of remaining performance obligations, which we also refer to as total backlog. We expect to recognize approximately 60% of our remaining performance obligations as revenue by 2019, an additional 25% by 2021 and the balance thereafter. On December 31, 2017 , we had $63.2 billion of remaining performance obligations, and on December 31, 2017 , we expected to recognize approximately 40% of these remaining performance obligations as revenue in 2018, an additional 40% by 2020 and the balance thereafter. Contract Estimates. 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.
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.
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.
Tax Uncertainties	Tax Uncertainties. 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. The total amount of these tax liabilities on April 1, 2018 , was not material to our results of operations, financial condition or cash flows. We participate in the Internal Revenue Service (IRS) Compliance Assurance Process (CAP), a real-time audit of our consolidated federal corporate income tax return. The IRS has examined our consolidated federal income tax returns through 2016. We do not expect the resolution of tax matters for open years to have a material impact on our results of operations, financial condition, cash flows or effective tax rate. Based on all known facts and circumstances and current tax law, we believe the total amount of any unrecognized tax benefits on April 1, 2018 , was not material to our results of operations, financial condition or cash flows, and if recognized, would not have a material impact on our effective tax rate. In addition, there are no tax positions for which it is reasonably possible that the unrecognized tax benefits will vary significantly over the next 12 months, producing, individually or in the aggregate, a material effect on our results of operations, financial condition or cash flows.
Unbilled Receivables	Unbilled receivables represent revenue recognized on long-term contracts (contract costs and estimated profits) less associated advances and progress billings. These amounts will be billed in accordance with the agreed-upon contractual terms or upon achievement of contractual milestones.
Inventories	The majority of our inventories are for business-jet aircraft. Our inventories are stated at the lower of cost or net realizable value. Work in process represents largely labor, material and overhead costs associated with aircraft in the manufacturing process and is based primarily on the estimated average unit cost in a production lot. Raw materials are valued primarily on the first-in, first-out method. We record pre-owned aircraft acquired in connection with the sale of new aircraft at the lower of the trade-in value or the estimated net realizable value.
Derivative Instruments and Hedging Activities	Interest Rate Risk. Our financial instruments subject to interest rate risk include fixed-rate long-term debt obligations and variable-rate commercial paper. However, the risk associated with these instruments is not material. Commodity Price Risk. We are subject to rising labor and commodity price risk, primarily on long-term, fixed-price contracts. To the extent possible, we include terms in our contracts that are designed to protect us from these risks. Some of the protective terms included in our contracts are considered derivative financial instruments but are not accounted for separately, because they are clearly and closely related to the host contract. We have not entered into any material commodity hedging contracts but may do so as circumstances warrant. We do not believe that changes in labor or commodity prices will have a material impact on our results of operations or cash flows. Investment Risk. Our investment policy allows for purchases of fixed-income securities with an investment-grade rating and a maximum maturity of up to five years . Foreign Currency Risk and Hedging Activities. 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 three -year average maturity of these instruments generally matches the duration of the activities that are at risk. We record changes in the fair value of derivative financial instruments in operating costs and expenses in the Consolidated Statement of Earnings or in other comprehensive loss (OCL) within the Consolidated Statement of Comprehensive Income depending on whether the derivative is designated and qualifies for hedge accounting. Gains and losses related to derivative financial instruments that qualify as cash flow hedges are deferred in OCL until the underlying transaction is reflected in earnings. We adjust derivative financial instruments not designated as cash flow hedges to market value each period and record the gain or loss in the Consolidated Statement of Earnings. The gains and losses on these instruments generally offset losses and gains on the assets, liabilities and other transactions being hedged. Gains and losses resulting from hedge ineffectiveness are recognized in the Consolidated Statement of Earnings for all derivative financial instruments, regardless of designation. 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.
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 end-of-period exchange rates, and statements of earnings at average exchange rates for each period. The resulting foreign currency translation adjustments are a component of OCL. 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 for the three-month periods ended April 1, 2018 , and April 2, 2017 . In addition, the effect of changes in foreign exchange rates on non-U.S. cash balances was not material for the three -month periods ended April 1, 2018 , and April 2, 2017 .
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.
Product Warranties	Product Warranties. We provide warranties to our customers associated with certain product sales. We record estimated warranty costs in the period in which the related products are delivered. The warranty liability recorded at each balance sheet date is based generally on the number of months of warranty coverage remaining for the products delivered and the average historical monthly warranty payments. Warranty obligations incurred in connection with long-term production contracts are accounted for within the contract estimates at completion. Our other warranty obligations, primarily for business-jet aircraft, are included in other current and noncurrent liabilities on the Consolidated Balance Sheet.
Retirement Plans	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 business groups. 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 recovery of the cost is considered probable based on our backlog and probable follow-on contracts, we defer the excess in other contract costs in other current assets on the Consolidated Balance Sheet until the cost is allocable to contracts. For other plans, the amount allocated to contracts and included in revenue has exceeded the plans’ cumulative benefit cost. We have similarly deferred recognition of these excess earnings on the Consolidated Balance Sheet. 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 provide defined-contribution benefits to eligible employees, as well as some remaining defined-benefit pension and other post-retirement benefits.
Business Group Information	We operate in four business groups: Aerospace, Combat Systems, Information Systems and Technology, and Marine Systems. We organize our business groups in accordance with the nature of products and services offered. We measure each group’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 business groups.

Acquisitions and Divestitures25

Acquisitions and Divestitures, Goodwill and Intangible Assets (Tables)	3 Months Ended
	Apr. 01, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Changes In The Carrying Amount Of Goodwill By Reporting Unit	The changes in the carrying amount of goodwill by reporting unit were as follows: Aerospace Combat Systems Information Systems and Technology 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 (a) Goodwill in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses. (b) Includes adjustments during the purchase price allocation period and an allocation of goodwill associated with the sale of the commercial health products business discussed above. (c) Consists primarily of adjustments for foreign currency translation.
Intangible Assets	Intangible assets consisted of the following: Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount Gross Carrying Amount (a) Accumulated Amortization Net Carrying Amount April 1, 2018 December 31, 2017 Contract and program intangible assets (b) $ 1,665 $ (1,318 ) $ 347 $ 1,684 $ (1,320 ) $ 364 Trade names and trademarks 477 (168 ) 309 465 (160 ) 305 Technology and software 154 (109 ) 45 137 (105 ) 32 Other intangible assets 155 (154 ) 1 155 (154 ) 1 Total intangible assets $ 2,451 $ (1,749 ) $ 702 $ 2,441 $ (1,739 ) $ 702 (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.

Revenue (Tables)

Revenue (Tables)	3 Months Ended
Revenue (Tables)	Apr. 01, 2018
Revenue Recognition [Abstract]
Schedule of Impact of Adjustments in Contract Estimates	revenue, operating earnings and diluted earnings per share as follows: Three Months Ended April 1, 2018 April 2, 2017 Revenue $ 115 $ 72 Operating earnings 97 50 Diluted earnings per share $ 0.25 $ 0.11
Revenue by Major Product Line	Revenue by major products and services was as follows: Three Months Ended April 1, 2018 April 2, 2017 Aircraft manufacturing, outfitting and completions $ 1,366 $ 1,629 Aircraft services 451 435 Pre-owned aircraft 8 10 Total Aerospace 1,825 2,074 Wheeled combat and tactical vehicles 625 560 Weapons systems, armament and munitions 383 346 Tanks and tracked vehicles 331 247 Engineering and other services 101 134 Total Combat Systems 1,440 1,287 C4ISR* solutions 1,098 1,088 Information technology (IT) services 1,138 1,058 Total Information Systems and Technology 2,236 2,146 Nuclear-powered submarines 1,296 1,204 Surface combatants 265 247 Auxiliary and commercial ships 218 143 Repair and other services 255 340 Total Marine Systems 2,034 1,934 Total revenue $ 7,535 $ 7,441 * Command, control, communications, computers, intelligence, surveillance and reconnaissance.
Revenue by Contract Type	Revenue by contract type was as follows: Three Months Ended April 1, 2018 Aerospace Combat Systems Information Systems and Technology Marine Systems Total Revenue Fixed-price $ 1,668 $ 1,253 $ 1,007 $ 1,305 $ 5,233 Cost-reimbursement — 179 1,017 728 1,924 Time-and-materials 157 8 212 1 378 Total revenue $ 1,825 $ 1,440 $ 2,236 $ 2,034 $ 7,535 Three Months Ended April 2, 2017 Fixed-price $ 1,902 $ 1,073 $ 930 $ 1,130 $ 5,035 Cost-reimbursement — 207 1,010 801 2,018 Time-and-materials 172 7 206 3 388 Total revenue $ 2,074 $ 1,287 $ 2,146 $ 1,934 $ 7,441
Revenue by Customer	Revenue by customer was as follows: Three Months Ended April 1, 2018 Aerospace Combat Systems Information Systems and Technology Marine Systems Total Revenue U.S. government: Department of Defense (DoD) $ 41 $ 607 $ 1,175 $ 1,950 $ 3,773 Non-DoD — 1 755 — 756 Foreign Military Sales (FMS) 16 69 15 29 129 Total U.S. government 57 677 1,945 1,979 4,658 U.S. commercial 842 58 67 53 1,020 Non-U.S. government 10 697 173 2 882 Non-U.S. commercial 916 8 51 — 975 Total revenue $ 1,825 $ 1,440 $ 2,236 $ 2,034 $ 7,535 Three Months Ended April 2, 2017 U.S. government: DoD $ 40 $ 609 $ 1,142 $ 1,837 $ 3,628 Non-DoD — 2 698 — 700 FMS 9 108 12 58 187 Total U.S. government 49 719 1,852 1,895 4,515 U.S. commercial 936 61 89 33 1,119 Non-U.S. government 5 502 176 4 687 Non-U.S. commercial 1,084 5 29 2 1,120 Total revenue $ 2,074 $ 1,287 $ 2,146 $ 1,934 $ 7,441

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
Earnings Per Share (Tables)	Apr. 01, 2018
Earnings Per Share [Abstract]
Basic and diluted weighted average shares outstanding	Basic and diluted weighted average shares outstanding were as follows (in thousands): Three Months Ended April 1, 2018 April 2, 2017 Basic weighted average shares outstanding 296,399 301,771 Dilutive effect of stock options and restricted stock/RSUs* 4,705 5,511 Diluted weighted average shares outstanding 301,104 307,282 * Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the period and, therefore, the effect of including these options would be antidilutive. These options totaled 517 and 681 for the three-month periods ended April 1, 2018 , and April 2, 2017 , respectively.

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
Fair Value (Tables)	Apr. 01, 2018
Fair Value Disclosures [Abstract]
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 April 1, 2018 , and December 31, 2017 , 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) April 1, 2018 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 6 $ 6 $ 2 $ 4 $ — Available-for-sale debt securities 130 130 — 130 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges (107 ) (107 ) — (107 ) — Measured at amortized cost: Short- and long-term debt principal (6,532 ) (6,356 ) — (6,356 ) — December 31, 2017 Measured at fair value: Marketable securities held in trust: Cash and equivalents $ 20 $ 20 $ 15 $ 5 $ — Available-for-sale debt securities 117 117 — 117 — Equity securities 54 54 54 — — Other investments 4 4 — — 4 Cash flow hedges (105 ) (105 ) — (105 ) — Measured at amortized cost: Short- and long-term debt principal (4,032 ) (3,974 ) — (3,974 ) —

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
Income Taxes (Tables)	Apr. 01, 2018
Income Tax Disclosure [Abstract]
Deferred Tax Assets and Liabilities	Our net deferred tax liability consisted of the following: April 1, 2018 December 31, 2017 Deferred tax asset $ 60 $ 75 Deferred tax liability (249 ) (244 ) Net deferred tax liability $ (189 ) $ (169 )

Unbilled Receivables (Tables)

Unbilled Receivables (Tables)	3 Months Ended
Unbilled Receivables (Tables)	Apr. 01, 2018
Contractors [Abstract]
Schedule of Unbilled Receivables	Unbilled receivables consisted of the following: April 1, 2018 December 31, 2017 Unbilled revenue $ 22,928 $ 21,845 Advances and progress billings (17,063 ) (16,605 ) Net unbilled receivables $ 5,865 $ 5,240

Inventories (Tables)

Inventories (Tables)	3 Months Ended
Inventories (Tables)	Apr. 01, 2018
Inventory Disclosure [Abstract]
Schedule Of Inventories	Inventories consisted of the following: April 1, 2018 December 31, 2017 Work in process $ 4,138 $ 3,872 Raw materials 1,328 1,357 Finished goods 52 51 Pre-owned aircraft 25 23 Total inventories $ 5,543 $ 5,303

Debt (Tables)

Debt (Tables)	3 Months Ended
Debt (Tables)	Apr. 01, 2018
Debt Disclosure [Abstract]
Schedule Of Debt	Debt consisted of the following: April 1, 2018 December 31, 2017 Fixed-rate notes due: Interest rate: July 2021 3.875% $ 500 $ 500 November 2022 2.250% 1,000 1,000 August 2023 1.875% 500 500 November 2024 2.375% 500 500 August 2026 2.125% 500 500 November 2027 2.625% 500 500 November 2042 3.600% 500 500 Commercial paper 2.097% 2,500 — Other Various 32 32 Total debt principal 6,532 4,032 Less unamortized debt issuance costs and discounts 53 50 Total debt 6,479 3,982 Less current portion 2,498 2 Long-term debt $ 3,981 $ 3,980

Other Liabilities (Tables)

Other Liabilities (Tables)	3 Months Ended
Other Liabilities (Tables)	Apr. 01, 2018
Other Liabilities Disclosure [Abstract]
Summary Of Significant Other Liabilities By Balance Sheet Caption	A summary of significant other liabilities by balance sheet caption follows: April 1, 2018 December 31, 2017 Salaries and wages $ 665 $ 786 Workers’ compensation 320 320 Retirement benefits 292 295 Fair value of cash flow hedges 201 180 Other (a) 1,320 1,317 Total other current liabilities $ 2,798 $ 2,898 Retirement benefits $ 4,359 $ 4,408 Customer deposits on commercial contracts 555 814 Deferred income taxes 249 244 Other (b) 1,059 1,066 Total other liabilities $ 6,222 $ 6,532 (a) Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace group, liabilities of discontinued operations, and insurance-related costs. (b) Consists primarily of warranty reserves, workers’ compensation liabilities and liabilities of discontinued operations.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
Shareholders' Equity (Tables)	Apr. 01, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The changes, pretax and net of tax, in each component of accumulated other comprehensive loss (AOCL) consisted of the following: Losses on Cash Flow Hedges Unrealized Gains on Marketable Securities Foreign Currency Translation Adjustments Changes in Retirement Plans’ Funded Status AOCL December 31, 2017 $ (94 ) $ 19 $ 402 $ (3,147 ) $ (2,820 ) Cumulative effect adjustments (see Note A) (4 ) (19 ) — (615 ) (638 ) Other comprehensive income, pretax (3 ) — 1 84 82 Provision for income tax, net (1 ) — — 16 15 Other comprehensive income, net of tax (2 ) — 1 68 67 April 1, 2018 $ (100 ) $ — $ 403 $ (3,694 ) $ (3,391 ) December 31, 2016 $ (345 ) $ 14 $ 69 $ (3,125 ) $ (3,387 ) Other comprehensive income, pretax 13 5 82 69 169 Provision for income tax, net 4 1 15 24 44 Other comprehensive income, net of tax 9 4 67 45 125 April 2, 2017 $ (336 ) $ 18 $ 136 $ (3,080 ) $ (3,262 )

Commitments And Contingencies (

Commitments And Contingencies (Tables)	3 Months Ended
Commitments And Contingencies (Tables)	Apr. 01, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule Of Changes In Carrying Amount Of Warranty Liabilities	The changes in the carrying amount of warranty liabilities for the three-month periods ended April 1, 2018 , and April 2, 2017 , were as follows: Three Months Ended April 1, 2018 April 2, 2017 Beginning balance $ 467 $ 474 Warranty expense 29 38 Payments (25 ) (24 ) Adjustments (3 ) — Ending balance $ 468 $ 488

Retirement Plans (Tables)

Retirement Plans (Tables)	3 Months Ended
Retirement Plans (Tables)	Apr. 01, 2018
Retirement Benefits [Abstract]
Net Periodic Defined-Benefit Pension And Other Post-Retirement Benefit Cost	Net periodic defined-benefit pension and other post-retirement benefit cost for the three-month periods ended April 1, 2018 , and April 2, 2017 , consisted of the following: Pension Benefits Other Post-retirement Benefits Three Months Ended April 1, 2018 April 2, 2017 April 1, 2018 April 2, 2017 Service cost $ 46 $ 42 $ 3 $ 3 Interest cost 114 113 8 8 Expected return on plan assets (179 ) (169 ) (9 ) (8 ) Recognized net actuarial loss (gain) 96 86 (1 ) (1 ) Amortization of prior service credit (11 ) (17 ) (1 ) (1 ) Net periodic benefit cost $ 66 $ 55 $ — $ 1

Business Group Information (Tab

Business Group Information (Tables)	3 Months Ended
Business Group Information (Tables)	Apr. 01, 2018
Segment Reporting [Abstract]
Summary Of Financial Information For Each Of Our Business Groups	Summary financial information for each of our business groups follows: Revenue Operating Earnings Three Months Ended April 1, 2018 April 2, 2017 April 1, 2018 April 2, 2017 Aerospace $ 1,825 $ 2,074 $ 346 $ 439 Combat Systems 1,440 1,287 224 205 Information Systems and Technology 2,236 2,146 247 236 Marine Systems 2,034 1,934 184 161 Corporate — — 7 5 Total $ 7,535 $ 7,441 $ 1,008 $ 1,046

Condensed Consolidating Finan38

Condensed Consolidating Financial Statements (Tables)	3 Months Ended
Condensed Consolidating Financial Statements (Tables)	Apr. 01, 2018
Consolidating Financial Statements [Abstract]
Condensed Consolidating Statement of Earnings (Unaudited)	CONDENSED CONSOLIDATING STATEMENT OF EARNINGS (UNAUDITED) Three Months Ended April 1, 2018 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Revenue $ — $ 6,484 $ 1,051 $ — $ 7,535 Cost of sales (19 ) 5,202 807 — 5,990 G&A 13 436 88 — 537 Operating earnings 6 846 156 — 1,008 Interest, net (26 ) — (1 ) — (27 ) Other, net (24 ) 1 2 — (21 ) Earnings before income tax (44 ) 847 157 — 960 Provision for income tax, net (42 ) 165 38 — 161 Equity in net earnings of subsidiaries 801 — — (801 ) — Net earnings $ 799 $ 682 $ 119 $ (801 ) $ 799 Comprehensive income $ 866 $ 685 $ 137 $ (822 ) $ 866 Three Months Ended April 2, 2017 Revenue $ — $ 6,544 $ 897 $ — $ 7,441 Cost of sales (17 ) 5,252 688 — 5,923 G&A 10 386 76 — 472 Operating earnings 7 906 133 — 1,046 Interest, net (24 ) — (1 ) — (25 ) Other, net (15 ) 3 1 — (11 ) Earnings before income tax (32 ) 909 133 — 1,010 Provision for income tax, net (67 ) 293 21 — 247 Equity in net earnings of subsidiaries 728 — — (728 ) — Net earnings $ 763 $ 616 $ 112 $ (728 ) $ 763 Comprehensive income $ 888 $ 617 $ 207 $ (824 ) $ 888
Condensed Consolidating Balance Sheet (Unaudited)	CONDENSED CONSOLIDATING BALANCE SHEET (UNAUDITED) April 1, 2018 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 3,787 $ — $ 545 $ — $ 4,332 Accounts receivable — 1,215 2,554 — 3,769 Unbilled receivables — 2,757 3,108 — 5,865 Inventories — 5,441 102 — 5,543 Other current assets 113 453 389 — 955 Total current assets 3,900 9,866 6,698 — 20,464 Noncurrent assets: Property, plant and equipment (PP&E) 228 6,857 1,250 — 8,335 Accumulated depreciation of PP&E (77 ) (3,940 ) (785 ) — (4,802 ) Intangible assets, net — 285 417 — 702 Goodwill — 8,336 3,619 — 11,955 Other assets 188 229 148 — 565 Investment in subsidiaries 45,799 — — (45,799 ) — Total noncurrent assets 46,138 11,767 4,649 (45,799 ) 16,755 Total assets $ 50,038 $ 21,633 $ 11,347 $ (45,799 ) $ 37,219 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ 2,496 $ — $ 2 $ — $ 2,498 Customer advances and deposits — 4,273 2,822 — 7,095 Other current liabilities 559 3,417 1,673 — 5,649 Total current liabilities 3,055 7,690 4,497 — 15,242 Noncurrent liabilities: Long-term debt 3,952 20 9 — 3,981 Other liabilities 2,399 3,234 589 — 6,222 Total noncurrent liabilities 6,351 3,254 598 — 10,203 Intercompany 28,858 (28,093 ) (765 ) — — Shareholders’ equity: Common stock 482 6 2,126 (2,132 ) 482 Other shareholders’ equity 11,292 38,776 4,891 (43,667 ) 11,292 Total shareholders’ equity 11,774 38,782 7,017 (45,799 ) 11,774 Total liabilities and shareholders’ equity $ 50,038 $ 21,633 $ 11,347 $ (45,799 ) $ 37,219 CONDENSED CONSOLIDATING BALANCE SHEET December 31, 2017 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated ASSETS Current assets: Cash and equivalents $ 1,930 $ — $ 1,053 $ — $ 2,983 Accounts receivable — 1,259 2,358 — 3,617 Unbilled receivables — 2,547 2,693 — 5,240 Inventories — 5,216 87 — 5,303 Other current assets 351 461 373 — 1,185 Total current assets 2,281 9,483 6,564 — 18,328 Noncurrent assets: PP&E 221 6,779 1,237 — 8,237 Accumulated depreciation of PP&E (75 ) (3,869 ) (776 ) — (4,720 ) Intangible assets, net — 287 415 — 702 Goodwill — 8,320 3,594 — 11,914 Other assets 199 232 154 — 585 Investment in subsidiaries 44,887 — — (44,887 ) — Total noncurrent assets 45,232 11,749 4,624 (44,887 ) 16,718 Total assets $ 47,513 $ 21,232 $ 11,188 $ (44,887 ) $ 35,046 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt and current portion of long-term debt $ — $ 1 $ 1 $ — $ 2 Customer advances and deposits — 4,180 2,812 — 6,992 Other current liabilities 561 3,758 1,786 — 6,105 Total current liabilities 561 7,939 4,599 — 13,099 Noncurrent liabilities: Long-term debt 3,950 21 9 — 3,980 Other liabilities 2,451 3,473 608 — 6,532 Total noncurrent liabilities 6,401 3,494 617 — 10,512 Intercompany 29,116 (28,494 ) (622 ) — — Shareholders’ equity: Common stock 482 6 2,126 (2,132 ) 482 Other shareholders’ equity 10,953 38,287 4,468 (42,755 ) 10,953 Total shareholders’ equity 11,435 38,293 6,594 (44,887 ) 11,435 Total liabilities and shareholders’ equity $ 47,513 $ 21,232 $ 11,188 $ (44,887 ) $ 35,046
Condensed Consolidating Statement of Cash Flows (Unaudited)	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS (UNAUDITED) Three Months Ended April 1, 2018 Parent Guarantors on a Combined Basis Other Subsidiaries on a Combined Basis Consolidating Adjustments Total Consolidated Net cash (used) provided by operating activities* $ 80 $ 105 $ (681 ) $ — $ (496 ) Cash flows from investing activities: Capital expenditures (7 ) (86 ) (11 ) — (104 ) Other, net 1 (2 ) — — (1 ) Net cash used by investing activities (6 ) (88 ) (11 ) — (105 ) Cash flows from financing activities: Proceeds from commercial paper, net 2,494 — — — 2,494 Purchases of common stock (267 ) — — — (267 ) Dividends paid (250 ) — — — (250 ) Other, net (25 ) — — — (25 ) Net cash provided by financing activities 1,952 — — — 1,952 Net cash used by discontinued operations (2 ) — — — (2 ) Cash sweep/funding by parent (167 ) (17 ) 184 — — Net increase in cash and equivalents 1,857 — (508 ) — 1,349 Cash and equivalents at beginning of period 1,930 — 1,053 — 2,983 Cash and equivalents at end of period $ 3,787 $ — $ 545 $ — $ 4,332 Three Months Ended April 2, 2017 Net cash provided by operating activities* $ (10 ) $ 443 $ 100 $ — $ 533 Cash flows from investing activities: Capital expenditures (3 ) (42 ) (17 ) — (62 ) Other, net — 28 (51 ) — (23 ) Net cash used by investing activities (3 ) (14 ) (68 ) — (85 ) Cash flows from financing activities: Purchases of common stock (354 ) — — — (354 ) Dividends paid (230 ) — — — (230 ) Other, net (21 ) (1 ) — — (22 ) Net cash used by financing activities (605 ) (1 ) — — (606 ) Net cash used by discontinued operations (8 ) — — — (8 ) Cash sweep/funding by parent 423 (428 ) 5 — — Net decrease in cash and equivalents (203 ) — 37 — (166 ) Cash and equivalents at beginning of period 1,254 — 1,080 — 2,334 Cash and equivalents at end of period $ 1,051 $ — $ 1,117 $ — $ 2,168 * Continuing operations only.

Summary Of Significant Accoun39

Summary Of Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Jan. 01, 2018
New Accounting Pronouncements
Length of fiscal quarters, weeks	91 days
Operating Earnings \| Accounting Standards Update 2017-07
New Accounting Pronouncements
New accounting pronouncement, effect of change in operating results	$ 11
Other Income \| Accounting Standards Update 2017-07
New Accounting Pronouncements
New accounting pronouncement, effect of change in operating results	$ (11)
Retained Earnings \| Accounting Standards Update 2016-01
New Accounting Pronouncements
Cumulative effect of new accounting pronouncement in period of adoption		$ 24
Retained Earnings \| Accounting Standards Update 2018-02
New Accounting Pronouncements
Cumulative effect of new accounting pronouncement in period of adoption		614
Accumulated Other Comprehensive Loss \| Accounting Standards Update 2016-01
New Accounting Pronouncements
Cumulative effect of new accounting pronouncement in period of adoption		(24)
Accumulated Other Comprehensive Loss \| Accounting Standards Update 2018-02
New Accounting Pronouncements
Cumulative effect of new accounting pronouncement in period of adoption		$ (614)

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Apr. 11, 2018	Apr. 03, 2018	Apr. 01, 2018
Credit Facility \| 364-day Committed Bank Credit Facility
Subsequent Events [Line Items]
Debt instrument term			364 days
Subsequent Event \| CSRA
Subsequent Events [Line Items]
Aggregate amount of consideration paid		$ 9,700
Payment of obligations under accounts receivable purchase agreement		450
Subsequent Event \| CSRA \| Credit Facility \| 364-day Committed Bank Credit Facility
Subsequent Events [Line Items]
Amount drawn under credit facility		$ 7,500
Subsequent Event \| CSRA \| Common Stock
Subsequent Events [Line Items]
Cash acquisition price (in dollars per share)		$ 41.25
Subsequent Event \| Scenario, Forecast \| Hawker Pacific
Subsequent Events [Line Items]
Aggregate amount of consideration paid	$ 250

Acquisitions and Divestitures41

Acquisitions and Divestitures, Goodwill and Intangible Assets (Details) $ in Millions	3 Months Ended		12 Months Ended
	Apr. 01, 2018USD ($)	Apr. 02, 2017USD ($)	Dec. 31, 2017USD ($)business
Goodwill and Intangible Assets Disclosure [Abstract]
Number of businesses acquired \| business			4
Payments to acquire businesses, gross			$ 399
Amortization expense	$ 20	$ 19

Acquisitions and Divestitures42

Acquisitions and Divestitures, Divestitures, Goodwill and Intangible Assets Changes In Amount Of Goodwill (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 01, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	$ 11,914
Acquisitions/divestitures	[2]	16
Other	[3]	25
Goodwill, end of period	[1]	11,955
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	2,638
Acquisitions/divestitures	[2]	0
Other	[3]	40
Goodwill, end of period	[1]	2,678
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	2,677
Acquisitions/divestitures	[2]	0
Other	[3]	(14)
Goodwill, end of period	[1]	2,663
Information Systems and Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	6,302
Acquisitions/divestitures	[2]	16
Other	[3]	(1)
Goodwill, end of period	[1]	6,317
Accumulated impairment loss		2,000	$ 2,000
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	297
Acquisitions/divestitures	[2]	0
Other	[3]	0
Goodwill, end of period	[1]	$ 297

[1]	Goodwill in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses.
[2]	Includes adjustments during the purchase price allocation period and an allocation of goodwill associated with the sale of the commercial health products business discussed above.
[3]	Consists primarily of adjustments for foreign currency translation.

Acquisitions and Divestitures43

Acquisitions and Divestitures, Divestitures, Goodwill and Intangible Assets Intangible Assets (Details) - USD ($) $ in Millions		Apr. 01, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	$ 2,451	$ 2,441
Accumulated Amortization		(1,749)	(1,739)
Net Carrying Amount		702	702
Contract and Program Intangible Assets
Intangible Assets [Line Items]
Gross Carrying Amount	[1],[2]	1,665	1,684
Accumulated Amortization	[2]	(1,318)	(1,320)
Net Carrying Amount	[2]	347	364
Trade Names and Trademarks
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	477	465
Accumulated Amortization		(168)	(160)
Net Carrying Amount		309	305
Technology and Software
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	154	137
Accumulated Amortization		(109)	(105)
Net Carrying Amount		45	32
Other Intangible Assets
Intangible Assets [Line Items]
Gross Carrying Amount	[1]	155	155
Accumulated Amortization		(154)	(154)
Net Carrying Amount		$ 1	$ 1

[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.

Revenue - Additional Informatio

Revenue - Additional Information (Details) contract in Thousands, $ in Billions	3 Months Ended
	Apr. 01, 2018USD ($)contract	Apr. 02, 2017USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Number of active contracts \| contract	10
Revenue recognized in contract liability balance \| $	$ 1.5	$ 1.7
Transferred over Time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, percentage from products and services transferred to customers	73.00%	70.00%
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%	30.00%

Revenue - Remaining Performance

Revenue - Remaining Performance Obligations to be Recognized as Revenue (Details) - USD ($) $ in Billions	3 Months Ended	12 Months Ended
	Apr. 01, 2018	Dec. 31, 2017
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligations	$ 62.1	$ 63.2
Revenue, remaining performance obligation, expected timing of satisfaction, period		1 year
Revenue, remaining performance obligation, percentage recognized		40.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year	2 years
Revenue, remaining performance obligation, percentage recognized	60.00%	40.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	2 years
Revenue, remaining performance obligation, percentage recognized	25.00%

Revenue - Impact of Adjustments

Revenue - Impact of Adjustments in Contract Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Operating earnings	$ 1,008	$ 1,046
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	115	72
Operating earnings	$ 97	$ 50
Diluted earnings per share	$ 0.25	$ 0.11

Revenue - Revenue by Products a

Revenue - Revenue by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Revenue [Line Items]
Revenue	$ 7,535	$ 7,441
Aerospace
Revenue [Line Items]
Revenue	1,825	2,074
Aerospace \| Aircraft manufacturing, outfitting and completions
Revenue [Line Items]
Revenue	1,366	1,629
Aerospace \| Aircraft services
Revenue [Line Items]
Revenue	451	435
Aerospace \| Pre-owned aircraft
Revenue [Line Items]
Revenue	8	10
Combat Systems
Revenue [Line Items]
Revenue	1,440	1,287
Combat Systems \| Wheeled combat and tactical vehicles
Revenue [Line Items]
Revenue	625	560
Combat Systems \| Weapons systems, armament and munitions
Revenue [Line Items]
Revenue	383	346
Combat Systems \| Tanks and tracked vehicles
Revenue [Line Items]
Revenue	331	247
Combat Systems \| Engineering and other services
Revenue [Line Items]
Revenue	101	134
Information Systems and Technology
Revenue [Line Items]
Revenue	2,236	2,146
Information Systems and Technology \| C4ISR solutions
Revenue [Line Items]
Revenue	1,098	1,088
Information Systems and Technology \| Information technology services
Revenue [Line Items]
Revenue	1,138	1,058
Marine Systems
Revenue [Line Items]
Revenue	2,034	1,934
Marine Systems \| Nuclear - powered submarines
Revenue [Line Items]
Revenue	1,296	1,204
Marine Systems \| Surface combatants
Revenue [Line Items]
Revenue	265	247
Marine Systems \| Auxiliary and commercial ships
Revenue [Line Items]
Revenue	218	143
Marine Systems \| Repair and other services
Revenue [Line Items]
Revenue	$ 255	$ 340

Revenue - Revenue by Contract T

Revenue - Revenue by Contract Type (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Revenue [Line Items]
Cost-reimbursement	$ 1,924	$ 2,018
Revenue	7,535	7,441
Aerospace
Revenue [Line Items]
Cost-reimbursement	0	0
Revenue	1,825	2,074
Combat Systems
Revenue [Line Items]
Cost-reimbursement	179	207
Revenue	1,440	1,287
Information Systems and Technology
Revenue [Line Items]
Cost-reimbursement	1,017	1,010
Revenue	2,236	2,146
Marine Systems
Revenue [Line Items]
Cost-reimbursement	728	801
Revenue	2,034	1,934
Fixed-price
Revenue [Line Items]
Revenue	5,233	5,035
Fixed-price \| Aerospace
Revenue [Line Items]
Revenue	1,668	1,902
Fixed-price \| Combat Systems
Revenue [Line Items]
Revenue	1,253	1,073
Fixed-price \| Information Systems and Technology
Revenue [Line Items]
Revenue	1,007	930
Fixed-price \| Marine Systems
Revenue [Line Items]
Revenue	1,305	1,130
Time-and-materials
Revenue [Line Items]
Revenue	378	388
Time-and-materials \| Aerospace
Revenue [Line Items]
Revenue	157	172
Time-and-materials \| Combat Systems
Revenue [Line Items]
Revenue	8	7
Time-and-materials \| Information Systems and Technology
Revenue [Line Items]
Revenue	212	206
Time-and-materials \| Marine Systems
Revenue [Line Items]
Revenue	$ 1	$ 3

Revenue - Revenue by Customer (

Revenue - Revenue by Customer (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Revenue [Line Items]
Revenue	$ 7,535	$ 7,441
Aerospace
Revenue [Line Items]
Revenue	1,825	2,074
Combat Systems
Revenue [Line Items]
Revenue	1,440	1,287
Information Systems and Technology
Revenue [Line Items]
Revenue	2,236	2,146
Marine Systems
Revenue [Line Items]
Revenue	2,034	1,934
U.S. Government - Department of Defense
Revenue [Line Items]
Revenue	3,773	3,628
U.S. Government - Department of Defense \| Aerospace
Revenue [Line Items]
Revenue	41	40
U.S. Government - Department of Defense \| Combat Systems
Revenue [Line Items]
Revenue	607	609
U.S. Government - Department of Defense \| Information Systems and Technology
Revenue [Line Items]
Revenue	1,175	1,142
U.S. Government - Department of Defense \| Marine Systems
Revenue [Line Items]
Revenue	1,950	1,837
U.S. Government - Non Department of Defense
Revenue [Line Items]
Revenue	756	700
U.S. Government - Non Department of Defense \| Aerospace
Revenue [Line Items]
Revenue	0	0
U.S. Government - Non Department of Defense \| Combat Systems
Revenue [Line Items]
Revenue	1	2
U.S. Government - Non Department of Defense \| Information Systems and Technology
Revenue [Line Items]
Revenue	755	698
U.S. Government - Non Department of Defense \| Marine Systems
Revenue [Line Items]
Revenue	0	0
U.S. Government - Foreign Military Sales
Revenue [Line Items]
Revenue	129	187
U.S. Government - Foreign Military Sales \| Aerospace
Revenue [Line Items]
Revenue	16	9
U.S. Government - Foreign Military Sales \| Combat Systems
Revenue [Line Items]
Revenue	69	108
U.S. Government - Foreign Military Sales \| Information Systems and Technology
Revenue [Line Items]
Revenue	15	12
U.S. Government - Foreign Military Sales \| Marine Systems
Revenue [Line Items]
Revenue	29	58
U.S. Government
Revenue [Line Items]
Revenue	4,658	4,515
U.S. Government \| Aerospace
Revenue [Line Items]
Revenue	57	49
U.S. Government \| Combat Systems
Revenue [Line Items]
Revenue	677	719
U.S. Government \| Information Systems and Technology
Revenue [Line Items]
Revenue	1,945	1,852
U.S. Government \| Marine Systems
Revenue [Line Items]
Revenue	1,979	1,895
U.S. Commercial
Revenue [Line Items]
Revenue	1,020	1,119
U.S. Commercial \| Aerospace
Revenue [Line Items]
Revenue	842	936
U.S. Commercial \| Combat Systems
Revenue [Line Items]
Revenue	58	61
U.S. Commercial \| Information Systems and Technology
Revenue [Line Items]
Revenue	67	89
U.S. Commercial \| Marine Systems
Revenue [Line Items]
Revenue	53	33
Non U S Government
Revenue [Line Items]
Revenue	882	687
Non U S Government \| Aerospace
Revenue [Line Items]
Revenue	10	5
Non U S Government \| Combat Systems
Revenue [Line Items]
Revenue	697	502
Non U S Government \| Information Systems and Technology
Revenue [Line Items]
Revenue	173	176
Non U S Government \| Marine Systems
Revenue [Line Items]
Revenue	2	4
Non - U.S. Commercial
Revenue [Line Items]
Revenue	975	1,120
Non - U.S. Commercial \| Aerospace
Revenue [Line Items]
Revenue	916	1,084
Non - U.S. Commercial \| Combat Systems
Revenue [Line Items]
Revenue	8	5
Non - U.S. Commercial \| Information Systems and Technology
Revenue [Line Items]
Revenue	51	29
Non - U.S. Commercial \| Marine Systems
Revenue [Line Items]
Revenue	$ 0	$ 2

Earnings Per Share (Detail)

Earnings Per Share (Detail) - shares shares in Thousands		3 Months Ended
Earnings Per Share (Detail) - shares shares in Thousands		Apr. 01, 2018	Apr. 02, 2017
Earnings Per Share [Abstract]
Basic weighted average shares outstanding (shares)		296,399	301,771
Dilutive effect of stock options and restricted stock/RSUs (shares)	[1]	4,705	5,511
Diluted weighted average shares outstanding (shares)		301,104	307,282

[1]	Excludes outstanding options to purchase shares of common stock that had exercise prices in excess of the average market price of our common stock during the period and, therefore, the effect of including these options would be antidilutive. These options totaled 517 and 681 for the three-month periods ended April 1, 2018, and April 2, 2017, respectively.

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares shares in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Stock Options and Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (shares)	517	681

Fair Value (Details)

Fair Value (Details) - USD ($) $ in Millions	Apr. 01, 2018	Dec. 31, 2017
Fair Value
Financial assets (liabilities)
Cash and equivalents	$ 6	$ 20
Available-for-sale debt securities	130
Available-for-sale debt securities		117
Equity securities	54
Equity securities		54
Other investments	4
Other investments		4
Cash flow hedges	(107)	(105)
Short- and long-term debt principal	(6,356)	(3,974)
Carrying Value
Financial assets (liabilities)
Cash and equivalents	6	20
Available-for-sale debt securities	130
Available-for-sale debt securities		117
Equity securities	54
Equity securities		54
Other investments	4
Other investments		4
Cash flow hedges	(107)	(105)
Short- and long-term debt principal	(6,532)	(4,032)
Fair Value, Inputs, Level 1
Financial assets (liabilities)
Cash and equivalents	2	15
Available-for-sale debt securities	0
Available-for-sale debt securities		0
Equity securities	54
Equity securities		54
Other investments	0
Other investments		0
Cash flow hedges	0	0
Short- and long-term debt principal	0	0
Fair Value, Inputs, Level 2
Financial assets (liabilities)
Cash and equivalents	4	5
Available-for-sale debt securities	130
Available-for-sale debt securities		117
Equity securities	0
Equity securities		0
Other investments	0
Other investments		0
Cash flow hedges	(107)	(105)
Short- and long-term debt principal	(6,356)	(3,974)
Fair Value, 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
Equity securities		0
Other investments	4
Other investments		4
Cash flow hedges	0	0
Short- and long-term debt principal	$ 0	$ 0

Income Taxes Deferred Tax (Deta

Income Taxes Deferred Tax (Details) - USD ($) $ in Millions	Apr. 01, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred tax asset	$ 60	$ 75
Deferred tax liability	(249)	(244)
Net deferred tax liability	$ (189)	$ (169)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details)	Apr. 01, 2018USD ($)
Income Tax Disclosure [Abstract]
Possible chance of tax position sustained, percentage	50.00%
Amount of unrecorded benefit	$ 0

Unbilled Receivables (Details)

Unbilled Receivables (Details) - USD ($) $ in Millions	Apr. 01, 2018	Dec. 31, 2017
Contractors [Abstract]
Unbilled revenue	$ 22,928	$ 21,845
Advances and progress billings	(17,063)	(16,605)
Net unbilled receivables	$ 5,865	$ 5,240

Inventory (Details)

Inventory (Details) - USD ($) $ in Millions	Apr. 01, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Work in process	$ 4,138	$ 3,872
Raw materials	1,328	1,357
Finished goods	52	51
Pre-owned aircraft	25	23
Total inventories	$ 5,543	$ 5,303

Debt (Details)

Debt (Details) - USD ($) $ in Millions	3 Months Ended
Debt (Details) - USD ($) $ in Millions	Apr. 01, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt principal	$ 6,532	$ 4,032
Less unamortized debt issuance costs and discounts	53	50
Total debt	6,479	3,982
Less current portion	2,498	2
Long-term debt	3,981	3,980
Commercial Paper
Debt Instrument [Line Items]
Short term debt	$ 2,500	0
Weighted average interest rate	2.097%
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 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 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 November 2042
Debt Instrument [Line Items]
Long term debt	$ 500	500
Interest rate	3.60%
Other Debt Securities
Debt Instrument [Line Items]
Long term debt	$ 32	$ 32
Other Interest rate	Various

Debt - Additional Information (

Debt - Additional Information (Details) $ in Billions	Apr. 03, 2018USD ($)	Apr. 01, 2018USD ($)credit_facility	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Number of credit facilities \| credit_facility		3
Percentage of owned subsidiaries guaranteed fixed rate notes (the guarantors)		100.00%
Scenario, Forecast
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 5
Credit Facility \| Multi-year Facility Expiring July 2018
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity			$ 1
Credit Facility \| 364-day Committed Bank Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 7.5
Debt instrument term		364 days
Credit Facility \| 364-day Committed Bank Credit Facility \| Scenario, Forecast
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	2
Credit Facility \| 364-day Committed Bank Credit Facility \| Subsequent Event \| CSRA
Debt Instrument [Line Items]
Amount drawn under credit facility	$ 7.5
Commercial Paper
Debt Instrument [Line Items]
Commercial paper issued		$ 2.5
Weighted average interest rate		2.097%
Debt instrument term		90 days
Credit Facility \| Multi-year Facility Expiring March 2023
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 2
Credit Facility \| Multi-year Facility Expiring November 2020
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 1

Other Liabilities (Details)

Other Liabilities (Details) - USD ($) $ in Millions		Apr. 01, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Salaries and wages		$ 665	$ 786
Fair value of cash flow hedges		201	180
Workers' compensation		320	320
Retirement benefits		292	295
Other	[1]	1,320	1,317
Total other current liabilities		2,798	2,898
Retirement benefits		4,359	4,408
Customer deposits on commercial contracts		555	814
Deferred income taxes		249	244
Other	[2]	1,059	1,066
Total other liabilities		$ 6,222	$ 6,532

[1]	Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace group, liabilities of discontinued operations, and insurance-related costs.
[2]	Consists primarily of warranty reserves, workers’ compensation liabilities and liabilities of discontinued operations.

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017	Mar. 01, 2017
Class of Stock [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			10
Stock repurchased during the period, shares	1.2	1.9
Stock repurchased during the period, value	$ 257	$ 355
Remaining number of shares authorized to be repurchased, shares	6.4
Shares remaining to be repurchased as a percent of total shares outstanding	2.00%
Recognized net actuarial losses (before tax)	$ 95	85
Amortization of prior service credit (before tax)	12	18
Purchases of common stock	$ 267	$ 354
Dividends declared per share	$ 0.93	$ 0.84
Dividends paid in cash	$ 250	$ 230

Shareholders' Equity - Changes

Shareholders' Equity - Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (2,820)	$ (3,387)
Cumulative effect adjustments	(638)
Other comprehensive income (loss) pretax	82	169
Provision (benefit) for income tax, net	15	44
Other comprehensive income (loss) net of tax	67	125
Ending Balance	(3,391)	(3,262)
Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(94)	(345)
Cumulative effect adjustments	(4)
Other comprehensive income (loss) pretax	(3)	13
Provision (benefit) for income tax, net	(1)	4
Other comprehensive income (loss) net of tax	(2)	9
Ending Balance	(100)	(336)
Unrealized Gains on Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	19	14
Cumulative effect adjustments	(19)
Other comprehensive income (loss) pretax	0	5
Provision (benefit) for income tax, net	0	1
Other comprehensive income (loss) net of tax	0	4
Ending Balance	0	18
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	402	69
Cumulative effect adjustments	0
Other comprehensive income (loss) pretax	1	82
Provision (benefit) for income tax, net	0	15
Other comprehensive income (loss) net of tax	1	67
Ending Balance	403	136
Changes in Retirement Plans’ Funded Status
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(3,147)	(3,125)
Cumulative effect adjustments	(615)
Other comprehensive income (loss) pretax	84	69
Provision (benefit) for income tax, net	16	24
Other comprehensive income (loss) net of tax	68	45
Ending Balance	$ (3,694)	$ (3,080)

Derivative Instruments And He62

Derivative Instruments And Hedging Activities - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Dec. 31, 2017	Apr. 02, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Notional forward foreign exchange contracts outstanding	$ 4,300	$ 4,300
Average maturity of foreign currency forward contracts, in years	3 years
Fair value hedges	$ 0	0
Net investment hedges	0	0
Cash and equivalents	4,332	2,983	$ 2,168	$ 2,334
Marketable securities held in trust	$ 190	$ 191
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Maturity of fixed-income securities, in years	5 years

Commitments And Contingencies -

Commitments And Contingencies - Additional Information (Details) $ in Billions	3 Months Ended
	Apr. 01, 2018USD ($)
Other Commitments [Line Items]
Letters of credit and guarantees	$ 1.4
Maximum
Other Commitments [Line Items]
Period preceding delivery of aircraft to customer fair market value of trade-in aircraft is established, days, maximum	45 days

Commitments And Contingencies64

Commitments And Contingencies - Product Guarantee (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance	$ 467	$ 474
Warranty expense	29	38
Payments	(25)	(24)
Adjustments	(3)	0
Ending balance	$ 468	$ 488

Retirement Plans - Benefits Pla

Retirement Plans - Benefits Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Defined Benefit Plan Disclosure [Line Items]
Required employer contributions to defined-benefit retirement plans during the fiscal year	$ 315
Expected future employer contributions to defined-benefit retirement plans during the fiscal year	550
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	46	$ 42
Interest cost	114	113
Expected return on plan assets	(179)	(169)
Recognized net actuarial loss (gain)	96	86
Amortization of prior service credit	(11)	(17)
Net periodic benefit cost	66	55
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3
Interest cost	8	8
Expected return on plan assets	(9)	(8)
Recognized net actuarial loss (gain)	(1)	(1)
Amortization of prior service credit	(1)	(1)
Net periodic benefit cost	$ 0	$ 1

Business Group Information - Ad

Business Group Information - Additional Information (Details)	3 Months Ended
	Apr. 01, 2018groupSegment
Segment Reporting [Abstract]
Number of operating business groups (segment) \| Segment	4
Number of defense groups \| group	3

Segment Reporting Information (

Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Segment Reporting Information [Line Items]
Revenue	$ 7,535	$ 7,441
Operating earnings	1,008	1,046
Aerospace
Segment Reporting Information [Line Items]
Revenue	1,825	2,074
Operating earnings	346	439
Combat Systems
Segment Reporting Information [Line Items]
Revenue	1,440	1,287
Operating earnings	224	205
Information Systems and Technology
Segment Reporting Information [Line Items]
Revenue	2,236	2,146
Operating earnings	247	236
Marine Systems
Segment Reporting Information [Line Items]
Revenue	2,034	1,934
Operating earnings	184	161
Corporate
Segment Reporting Information [Line Items]
Revenue	0	0
Operating earnings	$ 7	$ 5

Condensed Consolidating Finan68

Condensed Consolidating Financial Statements - Narrative (Details)	3 Months Ended
	Apr. 01, 2018
Consolidating Financial Statements [Abstract]
Percentage of owned subsidiaries (the guarantors)	100.00%

Condensed Consolidating Stateme

Condensed Consolidating Statements of Earnings (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Revenue:
Revenue	$ 7,535	$ 7,441
Operating costs and expenses:
Cost of sales	5,990	5,923
General and administrative (G&A)	537	472
Operating earnings	1,008	1,046
Interest, net	(27)	(25)
Other, net	(21)	(11)
Earnings before income tax	960	1,010
Provision for income tax, net	161	247
Equity in net earnings of subsidiaries	0	0
Net earnings	799	763
Comprehensive income	866	888
Consolidating Adjustments
Revenue:
Revenue	0	0
Operating costs and expenses:
Cost of sales	0	0
General and administrative (G&A)	0	0
Operating earnings	0	0
Interest, net	0	0
Other, net	0	0
Earnings before income tax	0	0
Provision for income tax, net	0	0
Equity in net earnings of subsidiaries	(801)	(728)
Net earnings	(801)	(728)
Comprehensive income	(822)	(824)
Parent Company
Revenue:
Revenue	0	0
Operating costs and expenses:
Cost of sales	(19)	(17)
General and administrative (G&A)	13	10
Operating earnings	6	7
Interest, net	(26)	(24)
Other, net	(24)	(15)
Earnings before income tax	(44)	(32)
Provision for income tax, net	(42)	(67)
Equity in net earnings of subsidiaries	801	728
Net earnings	799	763
Comprehensive income	866	888
Guarantor Subsidiaries
Revenue:
Revenue	6,484	6,544
Operating costs and expenses:
Cost of sales	5,202	5,252
General and administrative (G&A)	436	386
Operating earnings	846	906
Interest, net	0	0
Other, net	1	3
Earnings before income tax	847	909
Provision for income tax, net	165	293
Equity in net earnings of subsidiaries	0	0
Net earnings	682	616
Comprehensive income	685	617
Non-Guarantor Subsidiaries
Revenue:
Revenue	1,051	897
Operating costs and expenses:
Cost of sales	807	688
General and administrative (G&A)	88	76
Operating earnings	156	133
Interest, net	(1)	(1)
Other, net	2	1
Earnings before income tax	157	133
Provision for income tax, net	38	21
Equity in net earnings of subsidiaries	0	0
Net earnings	119	112
Comprehensive income	$ 137	$ 207

Condensed Consolidating Balance

Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Millions		Apr. 01, 2018	Dec. 31, 2017	Apr. 02, 2017	Dec. 31, 2016
Current assets:
Cash and equivalents		$ 4,332	$ 2,983	$ 2,168	$ 2,334
Accounts receivable		3,769	3,617
Unbilled receivables		5,865	5,240
Inventories		5,543	5,303
Other current assets		955	1,185
Total current assets		20,464	18,328
Noncurrent assets:
Property, plant and equipment (PP&E)		8,335	8,237
Accumulated depreciation of PP&E		(4,802)	(4,720)
Intangible assets, net		702	702
Goodwill	[1]	11,955	11,914
Other assets		565	585
Investment in subsidiaries		0	0
Total noncurrent assets		16,755	16,718
Total assets		37,219	35,046
Current liabilities:
Short-term debt and current portion of long-term debt		2,498	2
Customer advances and deposits		7,095	6,992
Other current liabilities		5,649	6,105
Total current liabilities		15,242	13,099
Noncurrent liabilities:
Long-term debt		3,981	3,980
Other liabilities		6,222	6,532
Total noncurrent liabilities		10,203	10,512
Intercompany		0	0
Shareholders’ equity:
Common stock		482	482
Other shareholders’ equity		11,292	10,953
Total shareholders’ equity		11,774	11,435	10,583	10,301
Total liabilities and shareholders’ equity		37,219	35,046
Consolidating Adjustments
Current assets:
Cash and equivalents		0	0	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:
Property, plant and equipment (PP&E)		0	0
Accumulated depreciation of PP&E		0	0
Intangible assets, net		0	0
Goodwill		0	0
Other assets		0	0
Investment in subsidiaries		(45,799)	(44,887)
Total noncurrent assets		(45,799)	(44,887)
Total assets		(45,799)	(44,887)
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
Intercompany		0	0
Shareholders’ equity:
Common stock		(2,132)	(2,132)
Other shareholders’ equity		(43,667)	(42,755)
Total shareholders’ equity		(45,799)	(44,887)
Total liabilities and shareholders’ equity		(45,799)	(44,887)
Parent Company
Current assets:
Cash and equivalents		3,787	1,930	1,051	1,254
Accounts receivable		0	0
Unbilled receivables		0	0
Inventories		0	0
Other current assets		113	351
Total current assets		3,900	2,281
Noncurrent assets:
Property, plant and equipment (PP&E)		228	221
Accumulated depreciation of PP&E		(77)	(75)
Intangible assets, net		0	0
Goodwill		0	0
Other assets		188	199
Investment in subsidiaries		45,799	44,887
Total noncurrent assets		46,138	45,232
Total assets		50,038	47,513
Current liabilities:
Short-term debt and current portion of long-term debt		2,496	0
Customer advances and deposits		0	0
Other current liabilities		559	561
Total current liabilities		3,055	561
Noncurrent liabilities:
Long-term debt		3,952	3,950
Other liabilities		2,399	2,451
Total noncurrent liabilities		6,351	6,401
Intercompany		28,858	29,116
Shareholders’ equity:
Common stock		482	482
Other shareholders’ equity		11,292	10,953
Total shareholders’ equity		11,774	11,435
Total liabilities and shareholders’ equity		50,038	47,513
Guarantor Subsidiaries
Current assets:
Cash and equivalents		0	0	0	0
Accounts receivable		1,215	1,259
Unbilled receivables		2,757	2,547
Inventories		5,441	5,216
Other current assets		453	461
Total current assets		9,866	9,483
Noncurrent assets:
Property, plant and equipment (PP&E)		6,857	6,779
Accumulated depreciation of PP&E		(3,940)	(3,869)
Intangible assets, net		285	287
Goodwill		8,336	8,320
Other assets		229	232
Investment in subsidiaries		0	0
Total noncurrent assets		11,767	11,749
Total assets		21,633	21,232
Current liabilities:
Short-term debt and current portion of long-term debt		0	1
Customer advances and deposits		4,273	4,180
Other current liabilities		3,417	3,758
Total current liabilities		7,690	7,939
Noncurrent liabilities:
Long-term debt		20	21
Other liabilities		3,234	3,473
Total noncurrent liabilities		3,254	3,494
Intercompany		(28,093)	(28,494)
Shareholders’ equity:
Common stock		6	6
Other shareholders’ equity		38,776	38,287
Total shareholders’ equity		38,782	38,293
Total liabilities and shareholders’ equity		21,633	21,232
Non-Guarantor Subsidiaries
Current assets:
Cash and equivalents		545	1,053	$ 1,117	$ 1,080
Accounts receivable		2,554	2,358
Unbilled receivables		3,108	2,693
Inventories		102	87
Other current assets		389	373
Total current assets		6,698	6,564
Noncurrent assets:
Property, plant and equipment (PP&E)		1,250	1,237
Accumulated depreciation of PP&E		(785)	(776)
Intangible assets, net		417	415
Goodwill		3,619	3,594
Other assets		148	154
Investment in subsidiaries		0	0
Total noncurrent assets		4,649	4,624
Total assets		11,347	11,188
Current liabilities:
Short-term debt and current portion of long-term debt		2	1
Customer advances and deposits		2,822	2,812
Other current liabilities		1,673	1,786
Total current liabilities		4,497	4,599
Noncurrent liabilities:
Long-term debt		9	9
Other liabilities		589	608
Total noncurrent liabilities		598	617
Intercompany		(765)	(622)
Shareholders’ equity:
Common stock		2,126	2,126
Other shareholders’ equity		4,891	4,468
Total shareholders’ equity		7,017	6,594
Total liabilities and shareholders’ equity		$ 11,347	$ 11,188

[1]	Goodwill in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses.

Condensed Consolidating State71

Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 01, 2018	Apr. 02, 2017
Condensed Financial Statements [Line Items]
Net cash (used) provided by operating activities	[1]	$ (496)	$ 533
Cash flows from investing activities:
Capital expenditures		(104)	(62)
Other, net		(1)	(23)
Net cash used by investing activities		(105)	(85)
Cash flows from financing activities:
Proceeds from commercial paper, net		2,494	0
Purchases of common stock		(267)	(354)
Dividends paid		(250)	(230)
Other, net		(25)	(22)
Net cash provided (used) by financing activities		1,952	(606)
Net cash used by discontinued operations		(2)	(8)
Cash sweep/funding by parent		0	0
Net decrease in cash and equivalents		1,349	(166)
Cash and equivalents at beginning of period		2,983	2,334
Cash and equivalents at end of period		4,332	2,168
Consolidating Adjustments
Condensed Financial Statements [Line Items]
Net cash (used) provided by operating activities	[1]	0	0
Cash flows from investing activities:
Capital expenditures		0	0
Other, net		0	0
Net cash used by investing activities		0	0
Cash flows from financing activities:
Proceeds from commercial paper, net		0
Purchases of common stock		0	0
Dividends paid		0	0
Other, net		0	0
Net cash provided (used) by financing activities		0	0
Net cash used by discontinued operations		0	0
Cash sweep/funding by parent		0	0
Net decrease in cash and equivalents		0	0
Cash and equivalents at beginning of period		0	0
Cash and equivalents at end of period		0	0
Parent Company
Condensed Financial Statements [Line Items]
Net cash (used) provided by operating activities	[1]	80	(10)
Cash flows from investing activities:
Capital expenditures		(7)	(3)
Other, net		1	0
Net cash used by investing activities		(6)	(3)
Cash flows from financing activities:
Proceeds from commercial paper, net		2,494
Purchases of common stock		(267)	(354)
Dividends paid		(250)	(230)
Other, net		(25)	(21)
Net cash provided (used) by financing activities		1,952	(605)
Net cash used by discontinued operations		(2)	(8)
Cash sweep/funding by parent		(167)	423
Net decrease in cash and equivalents		1,857	(203)
Cash and equivalents at beginning of period		1,930	1,254
Cash and equivalents at end of period		3,787	1,051
Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Net cash (used) provided by operating activities	[1]	105	443
Cash flows from investing activities:
Capital expenditures		(86)	(42)
Other, net		(2)	28
Net cash used by investing activities		(88)	(14)
Cash flows from financing activities:
Proceeds from commercial paper, net		0
Purchases of common stock		0	0
Dividends paid		0	0
Other, net		0	(1)
Net cash provided (used) by financing activities		0	(1)
Net cash used by discontinued operations		0	0
Cash sweep/funding by parent		(17)	(428)
Net decrease in cash and equivalents		0	0
Cash and equivalents at beginning of period		0	0
Cash and equivalents at end of period		0	0
Non-Guarantor Subsidiaries
Condensed Financial Statements [Line Items]
Net cash (used) provided by operating activities	[1]	(681)	100
Cash flows from investing activities:
Capital expenditures		(11)	(17)
Other, net		0	(51)
Net cash used by investing activities		(11)	(68)
Cash flows from financing activities:
Proceeds from commercial paper, net		0
Purchases of common stock		0	0
Dividends paid		0	0
Other, net		0	0
Net cash provided (used) by financing activities		0	0
Net cash used by discontinued operations		0	0
Cash sweep/funding by parent		184	5
Net decrease in cash and equivalents		(508)	37
Cash and equivalents at beginning of period		1,053	1,080
Cash and equivalents at end of period		$ 545	$ 1,117

[1]	* Continuing operations only