Summary of Significant Accounting Policies (Unaudited) |
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| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Significant Accounting Policies | 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation and Reporting These unaudited condensed consolidated financial statements (the “financial statements”) include the accounts of Northrop Grumman Corporation and its subsidiaries and joint ventures or other investments for which we consolidate the financial results (herein referred to as “Northrop Grumman,” the “company,” “we,” “us,” or “our”). Intercompany accounts, transactions and profits are eliminated in consolidation. Investments in equity securities and joint ventures where the company has significant influence, but not control, are accounted for using the equity method. On May 24, 2025 (the “Divestiture date”), the company completed its previously announced sale of substantially all of the Immersive Mission Solutions (IMS) operating unit of Defense Systems (the “training services” business or “divestiture”) for $333 million in cash and recorded a pre-tax gain on sale of $231 million. IMS is a provider of mission training and satellite ground network communications software for U.S. government customers. 2025 operating results include sales and operating income for the training services business prior to the Divestiture date. The financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP” or “FAS”) and in accordance with the rules of the Securities and Exchange Commission (SEC) for interim reporting. The financial statements include adjustments of a normal recurring nature considered necessary by management for a fair presentation of the company’s unaudited condensed consolidated financial position, results of operations and cash flows. For classification of certain current assets and liabilities, we consider the duration of our customer contracts when defining our operating cycle, which is generally longer than one year. During the fourth quarter of 2025, we modified our presentation of the changes in liabilities in the operating cash flow section of the consolidated statement of cash flows by disaggregating Accounts payable and other liabilities into three separate line items: Accounts payable, Advance payments and billings in excess of costs incurred, and Other liabilities. Prior period amounts have been conformed to the current period presentation. The modified presentation does not impact previously reported cash provided by operating activities. Results reported in the financial statements are not necessarily indicative of results that may be expected for the entire year. The financial statements should be read in conjunction with the information contained in the company’s 2025 Annual Report on Form 10-K. Quarterly information is labeled using a calendar convention; that is, first quarter is consistently labeled as ending on March 31, second quarter as ending on June 30 and third quarter as ending on September 30. It is the company’s long-standing practice to establish actual interim closing dates using a “fiscal” calendar, in which we close our books on a Friday near these quarter-end dates in order to normalize the potentially disruptive effects of quarterly closings on business processes. This practice is only used at interim periods within a reporting year. Accounting Estimates Preparation of the financial statements requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and the disclosure of contingencies at the date of the financial statements, as well as the reported amounts of sales and expenses during the reporting period. Estimates have been prepared using the most current and best available information; however, actual results could differ materially from those estimates. Revenue Recognition Contract Estimates Contract sales may include estimates of variable consideration, including cost or performance incentives (such as award and incentive fees), un-priced change orders, requests for equitable adjustment (REAs) and contract claims. Variable consideration is included in total estimated sales to the extent it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. We estimate variable consideration as the most likely amount to which we expect to be entitled. We recognize changes in estimated contract sales or costs and the resulting changes in contract profit on a cumulative basis. Net estimate-at-completion (EAC) adjustments represent the cumulative effect of the changes on current and prior periods; sales and operating margins in future periods are recognized as if the revised estimates had been used since contract inception. If it is determined that a loss is expected to result on an individual performance obligation, the entire amount of the estimable future loss, including an allocation of general and administrative (G&A) cost, is charged against income in the period the loss is identified. B-21 Program The company has previously recognized and disclosed cumulative losses of approximately $2.0 billion on the low-rate initial production (LRIP) phase of the B-21 program. As of September 30, 2026, the remaining loss accrual totaled $1.0 billion, which is included in Other current liabilities. Net EAC Adjustments The following table presents the effect of aggregate net EAC adjustments:
(1)Based on a 21 percent federal statutory tax rate. EAC adjustments can have a significant effect on the company’s financial statements. When such adjustments occur, we generally disclose the nature, underlying conditions and financial impact of the adjustments. In most cases, EAC adjustments have an equal impact on both revenue and operating income. However, for contracts in a forward loss position, the impact of EAC adjustments on revenue is different than the impact on operating income because changes in forward losses also impact cost of sales. 2026 – No EAC adjustments on a single performance obligation had a significant impact on the financial statements during the three months ended September 30, 2026. During the second quarter of 2026, the company recorded a $91 million unfavorable EAC adjustment on the Graphite Epoxy Motor (GEM) 63XL program at Space Systems and a $68 million unfavorable EAC adjustment on the Stand-in Attack Weapon (SiAW) program at Defense Systems. During the first quarter of 2026, the company recorded a $71 million unfavorable EAC adjustment on the GEM 63XL program and a $157 million net unfavorable EAC adjustment on the first four LRIP lots of the B-21 program at Aeronautics Systems, which was offset by a net reduction in the loss contingency accrual on the remainder of the program. 2025 – During the third quarter of 2025, the company recorded a $68 million favorable EAC adjustment in the restricted advanced microelectronics portfolio at Mission Systems as well as a $122 million unfavorable EAC adjustment on the first and second LRIP lots of the B-21 program, which was offset by a net reduction in the loss contingency accrual on the remaining LRIP lots. During the second quarter of 2025, the company recorded a $76 million favorable EAC adjustment on the engineering and manufacturing development (EMD) phase of the Sentinel program at Defense Systems. During the first quarter of 2025, the company recorded a $226 million unfavorable EAC adjustment on the first and second LRIP lots of the B-21 program at Aeronautics Systems. Backlog Backlog represents the future sales we expect to recognize on firm orders received by the company and is equivalent to the company’s remaining performance obligations at the end of each period. It comprises both funded backlog (firm orders for which funding is authorized and appropriated) and unfunded backlog. Unexercised contract options and indefinite delivery indefinite quantity (IDIQ) contracts are not included in backlog until the time an option or IDIQ task order is exercised or awarded. Backlog is converted into sales as costs are incurred or deliveries are made. Company backlog as of September 30, 2026 was $109.6 billion. Of our September 30, 2026 backlog, we expect to recognize approximately 35 percent as revenue over the next 12 months and 55 percent as revenue over the next 24 months, with the remainder to be recognized thereafter. Contract Assets and Liabilities For each of the company’s contracts, the timing of revenue recognition, customer billings, and cash collections results in a net contract asset or liability at the end of each reporting period. Contract assets are equivalent to and reflected as Unbilled receivables in the unaudited condensed consolidated statements of financial position and are primarily related to long-term contracts where revenue recognized under the cost-to-cost method exceeds amounts billed to customers. Contract liabilities are equivalent to and reflected as Advance payments and billings in excess of costs incurred in the unaudited condensed consolidated statements of financial position. The amount of revenue recognized for the three and nine months ended September 30, 2026 that was included in the December 31, 2025 contract liability balance was $552 million and $3.1 billion, respectively. The amount of revenue recognized for the three and nine months ended September 30, 2025 that was included in the December 31, 2024 contract liability balance was $431 million and $3.1 billion, respectively. Disaggregation of Revenue See Note 10 for information regarding the company’s sales by customer type, contract type and geographic region for each of our segments. We believe those categories best depict how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Property, Plant, and Equipment (PP&E) In connection with the company’s first quarter 2026 agreement with the U.S. Air Force to expand production capacity and increase the aircraft production rate for the B-21 program, we agreed to sell an aircraft to the U.S. Air Force that we had previously planned to utilize as a company-owned test asset. While the sale of this asset accelerates the LRIP aircraft delivery schedule, it does not change the number of aircraft we expect to deliver under the LRIP phase of the program. Because the company previously intended to use the test asset for internal purposes, we recognized the acquisition costs as capital expenditures and included it in PP&E. As we regularly sell this type of asset to customers in the ordinary course of business, we recorded the sale as a revenue transaction and included the net book value of the asset in Operating costs and expenses. Although we generally classify proceeds from revenue transactions as cash inflows from operating activities, we recognized the proceeds from this transaction as cash inflows from investing activities, consistent with our prior recognition of the cost to acquire the asset as capital expenditures. The company received cash payments of $371 million related to the sale during the third quarter of 2026 and included it in Proceeds from sale of equipment to a customer in the consolidated statements of cash flows. During the nine months ended September 30, 2026, the company received lease incentives for landlord funded leasehold improvements of $90 million related to Aeronautics Systems real estate leases, which were recorded in PP&E and included in non-cash investing activities. Non-cash investing activities for the nine months ended September 30, 2026 and 2025 include capital expenditures incurred but not yet paid of $149 million and $140 million, respectively. Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss, net of tax, are as follows:
Related Party Transactions For all periods presented, the company had no material related party transactions. Accounting Standards Updates On November 4, 2024, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2024-03 Disaggregation of Income Statement Expenses (Subtopic 220-40). ASU 2024-03 requires disaggregation of certain expense captions into specified categories in disclosures within the footnotes to the financial statements. ASU 2024-03 will be effective for annual periods beginning January 1, 2027 and interim periods beginning January 1, 2028. We expect to adopt ASU 2024-03 on a prospective basis; the standard will not have an impact on the company’s consolidated financial position, results of operations or cash flows. On September 18, 2025, the FASB issued ASU No. 2025-06 Targeted Improvements to the Accounting for Internal-Use Software (Subtopic 350-40). ASU 2025-06 removes references to prescriptive and sequential software development stages, requiring companies to capitalize internal-use software costs when management commits to funding the software project and it is probable the project will be completed. ASU 2025-06 will be effective for annual and interim periods beginning January 1, 2028, and can be applied on a prospective, modified prospective, or retrospective basis. We do not currently expect the standard will have a material impact on the company’s consolidated financial position, results of operations or cash flows. On December 8, 2025, the FASB issued ASU No. 2025-11 Interim Reporting (Topic 270): Narrow-Scope Improvements. ASU 2025-11 clarifies the applicability of Topic 270 and the form and content of interim financial statements. In addition, ASU 2025-11 requires entities to disclose material events occurring since the last annual reporting period. ASU 2025-11 will be effective for interim periods beginning January 1, 2028, and can be applied on a prospective or retrospective basis. We are evaluating the disclosure impact of ASU 2025-11; however, the standard will not have an impact on the company’s consolidated financial position, results of operations or cash flows. Other accounting standards updates adopted and/or issued, but not effective until after September 30, 2026, are not expected to have a material effect on the company’s consolidated financial position, results of operations and/or cash flows.
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| Related Party Transactions Disclosure | Related Party Transactions For all periods presented, the company had no material related party transactions.
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| Disposal Groups, Including Discontinued Operations, Disclosure | On May 24, 2025 (the “Divestiture date”), the company completed its previously announced sale of substantially all of the Immersive Mission Solutions (IMS) operating unit of Defense Systems (the “training services” business or “divestiture”) for $333 million in cash and recorded a pre-tax gain on sale of $231 million. IMS is a provider of mission training and satellite ground network communications software for U.S. government customers. 2025 operating results include sales and operating income for the training services business prior to the Divestiture date.
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