Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies A.Organization Leonardo DRS, Inc., together with its wholly owned subsidiaries (hereinafter, “DRS,” “the Company,” “us,” “our,” or “we”) is a supplier of defense electronics products, systems and military support services. The Company’s largest stockholder is Leonardo S.p.A, an Italian multi-national aerospace, defense and security company headquartered in Rome, Italy, through its ultimate sole ownership of Leonardo US Holding, LLC (“US Holding”). US Holding is the majority stockholder of the Company. DRS is a provider of defense products and technologies that are used across land, air, sea, space and cyber domains. Our diverse array of defense systems and solutions are offered to all branches of the U.S. military, major aerospace and defense prime contractors, government intelligence agencies, international military customers and industrial markets for deployment on a wide range of military platforms. We focus our capabilities in areas of critical importance to the U.S. military, such as advanced sensing, network computing, force protection and electric power and propulsion. These capabilities directly align with our two reportable operating segments: Advanced Sensing and Computing (“ASC”) and Integrated Mission Systems (“IMS”). The U.S. government is our largest customer and accounts for approximately 79% and 78% of our total revenues as an end-user for the three months ended March 31, 2026 and 2025, respectively. Our U.S. government revenues are highly concentrated with the U.S. Department of War, also known as the U.S. Department of Defense (the “DoW”). Specific international and commercial market opportunities exist within these segments and comprise approximately 21% and 22% of our total revenues for the three months ended March 31, 2026 and 2025, respectively. Our two reportable segments reflect the way performance is assessed and resources are allocated by our Chief Executive Officer, who is our chief operating decision maker (“CODM”). B.Basis of Presentation The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of DRS, its wholly owned subsidiaries and its controlling interests and contain all adjustments, which are of a normal and recurring nature, considered necessary by management to present fairly the financial position, results of operations and cash flows for the periods presented. Interests in ventures that are controlled by the Company, or for which the Company is otherwise deemed to be the primary beneficiary, are consolidated. For joint ventures in which the Company does not have a controlling interest, but exerts significant influence, the Company applies the equity method of accounting. All intercompany transactions and balances have been eliminated in consolidation. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates and assumptions include those relating to the recognition of contract revenues and estimated costs to complete contracts in process, recoverability of reported amounts of goodwill and intangible assets, valuation of acquired intangibles, accounting for business combinations, valuation of pensions and other postretirement benefits, the valuation of deferred tax assets and liabilities and the valuation of unrecognized tax benefits. Actual results could differ from these estimates. The unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). These rules and regulations permit some of the information and footnote disclosures included in financial statements prepared in accordance with U.S. GAAP to be condensed or omitted. These unaudited Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2025. C.New Accounting Pronouncements Disaggregation of Income Statement Expenses In November 2024, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires disclosure of specified information about certain costs and expenses. The new standard is effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, on a prospective basis. We are currently evaluating the impact of adopting this new pronouncement. Targeted Improvements to the Accounting for Internal-Use Software In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which removes references to project 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. The new standard is effective for fiscal years beginning after December 15, 2027 and interim periods within those fiscal years, and may be applied on a prospective, modified transition, or retrospective transition basis. We are currently evaluating the impact of adopting this new pronouncement. Accounting for Government Grants Received by Business Entities In December 2025, the FASB issued ASU 2025-10, Government Grants (Topic 832)—Accounting for Government Grants Received by Business Entities, which establishes the accounting for government grants received by business entities. The new standard is effective for fiscal years beginning after December 15, 2028 and interim periods within those fiscal years, and may be applied on a modified prospective, modified retrospective, or retrospective transition basis. We are currently evaluating the impact of adopting this new pronouncement.

Leonardo DRS, Inc., together with its wholly owned subsidiaries (hereinafter, “DRS,” “the Company,” “us,” “our,” or “we”) is a supplier of defense electronics products, systems and military support services. The Company’s largest stockholder is Leonardo S.p.A, an Italian multi-national aerospace, defense and security company headquartered in Rome, Italy, through its ultimate sole ownership of Leonardo US Holding, LLC (“US Holding”). US Holding is the majority stockholder of the Company.

DRS is a provider of defense products and technologies that are used across land, air, sea, space and cyber domains. Our diverse array of defense systems and solutions are offered to all branches of the U.S. military, major aerospace and defense prime contractors, government intelligence agencies, international military customers and industrial markets for deployment on a wide range of military platforms. We focus our capabilities in areas of critical importance to the U.S. military, such as advanced sensing, network computing, force protection and electric power and propulsion.

These capabilities directly align with our two reportable operating segments: Advanced Sensing and Computing (“ASC”) and Integrated Mission Systems (“IMS”). The U.S. government is our largest customer and accounts for approximately 79% and 78% of our total revenues as an end-user for the three months ended March 31, 2026 and 2025, respectively. Our U.S. government revenues are highly concentrated with the U.S. Department of War, also known as the U.S. Department of Defense (the “DoW”). Specific international and commercial market opportunities exist within these segments and comprise approximately 21% and 22% of our total revenues for the three months ended March 31, 2026 and 2025, respectively. Our two reportable segments reflect the way performance is assessed and resources are allocated by our Chief Executive Officer, who is our chief operating decision maker (“CODM”).

The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the accounts of DRS, its wholly owned subsidiaries and its controlling interests and contain all adjustments, which are of a normal and recurring nature, considered necessary by management to present fairly the financial position, results of operations and cash flows for the periods presented. Interests in ventures that are controlled by the Company, or for which the Company is otherwise deemed to be the primary beneficiary, are consolidated. For joint ventures in which the Company does not have a controlling interest, but exerts significant influence, the Company applies the equity method of accounting. All intercompany transactions and balances have been eliminated in consolidation.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates and assumptions include those relating to the recognition of contract revenues and estimated costs to complete contracts in process, recoverability of reported amounts of goodwill and intangible assets, valuation of acquired intangibles, accounting for business combinations, valuation of pensions and other postretirement benefits, the valuation of deferred tax assets and liabilities and the valuation of unrecognized tax benefits. Actual results could differ from these estimates.

The unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). These rules and regulations permit some of the information and footnote disclosures included in financial statements prepared in accordance with U.S. GAAP to be condensed or omitted.

These unaudited Consolidated Financial Statements should be read in conjunction with our audited Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended December 31, 2025.

In November 2024, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires disclosure of specified information about certain costs and expenses. The new standard is effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, on a prospective basis. We are currently evaluating the impact of adopting this new pronouncement.

In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which removes references to project 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. The new standard is effective for fiscal years beginning after December 15, 2027 and interim periods within those fiscal years, and may be applied on a prospective, modified transition, or retrospective transition basis. We are currently evaluating the impact of adopting this new pronouncement.

In December 2025, the FASB issued ASU 2025-10, Government Grants (Topic 832)—Accounting for Government Grants Received by Business Entities, which establishes the accounting for government grants received by business entities. The new standard is effective for fiscal years beginning after December 15, 2028 and interim periods within those fiscal years, and may be applied on a modified prospective, modified retrospective, or retrospective transition basis. We are currently evaluating the impact of adopting this new pronouncement.