Summary Of Significant Accounting Policies (Policies)	6 Months Ended
Summary Of Significant Accounting Policies (Policies)	Jun. 29, 2014
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. Consistent with defense industry practice, we classify assets and liabilities related to long-term production 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- and six-month periods ended June 29, 2014, are not necessarily indicative of the results that may be expected for the year ending December 31, 2014. The unaudited Consolidated Financial Statements contain all adjustments that are of a normal recurring nature necessary for a fair presentation of our results of operations and financial condition for the three- and six-month periods ended June 30, 2013, and June 29, 2014. 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, 2013. The unaudited Consolidated Financial Statements have been restated to reflect the results of operations of our axle business in discontinued operations (see further discussion below).
Revenue Recognition	Revenue Recognition. We account for revenues and earnings using the percentage-of-completion method. Under this method, contract costs and revenues are recognized as the work progresses, either as the products are produced or as services are rendered. We estimate the profit on a contract as the difference between the total estimated revenue and costs to complete a contract and recognize that profit over the life of the contract. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the loss in the quarter it is identified. We review and update our contract estimates regularly. We recognize changes in estimated profit on contracts under the reallocation method. Under the reallocation method, the impact of a revision in estimate is recognized prospectively over the remaining contract term. The net increase in our operating earnings (and on a per-share basis) from the favorable impact of revisions in contract estimates totaled $83 ($0.15) and $191 ($0.35) for the three- and six-month periods ended June 30, 2013, and $62 ($0.12) and $100 ($0.19) for the three- and six-month periods ended June 29, 2014, respectively. While no revisions on any one contract were material to our unaudited Consolidated Financial Statements in the second quarter and first six months of 2014, the amount decreased compared with the prior-year periods as 2013 included higher favorable revisions in contract estimates on several programs nearing completion in the Combat Systems and Information Systems and Technology groups. In the second quarter of 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers. ASU 2014-9 prescribes a single, common revenue standard that replaces most existing revenue recognition guidance in GAAP. The standard outlines a five-step model, whereby revenue is recognized as performance obligations within a contract are satisfied. The standard also requires new, expanded disclosures regarding revenue recognition. ASU 2014-9 is effective in the first quarter of 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. We have not yet selected a transition method nor have we determined the effect of the standard on our consolidated financial statements. The required adoption of the ASU in 2017 will preclude our use of the reallocation method of recognizing revisions in estimated profit on contracts discussed above. Because changes in estimated profit will be recognized in the period they are identified (cumulative catch-up method), rather than prospectively over the remaining contract term, we expect that the impact of revisions of contract estimates may be larger and potentially more variable from period to period. Anticipated losses on contracts will continue to be recognized in the quarter they are identified.
Discontinued Operations	Discontinued Operations. In June 2014, we committed to a plan to sell our axle business in the Combat Systems group. Accordingly, the assets and liabilities of the business, including an allocation of goodwill, were reported as held for sale and included in other current assets and liabilities on the unaudited Consolidated Balance Sheets. When a business is held for sale, management is required to evaluate the net assets of the business for impairment based on its fair value less cost to sell. Based on this analysis, we recognized a $106 after-tax loss in the second quarter. In late 2013, we settled our litigation with the U.S. Navy related to a terminated contract in the company’s former tactical military aircraft business. Under the terms of the settlement agreement, the Navy received a $198 credit that will be utilized over several years as the company renders design and construction services on the DDG-1000 program. This activity will be reported in net cash from discontinued operations on the Consolidated Statements of Cash Flows.
Subsequent Events	Subsequent Events. We have evaluated material events and transactions that have occurred after June 29, 2014, and concluded that no subsequent events have occurred that require adjustment to or disclosure in this Form 10-Q.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

+ References+ Details

- Definition

Disclosure of accounting policy for any discontinued operations. The results of operations of a component of an entity that either has been disposed of or is classified as held for sale is reported in discontinued operations if both: (a) the operations and cash flows of the component have been (or will be) eliminated from the ongoing operations of the entity as a result of the disposal transaction and (b) the entity will not have any significant continuing involvement in the operations of the component after the disposal transaction. If the entity elects to allocate interest expense to a discontinued operation, it may disclose its accounting policy for this election and describe its method of allocation.

+ References+ Details

- Definition

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

+ References+ Details