Basis of Presentation and Summary of Significant Accounting Policies (Policies) |
9 Months Ended |
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Oct. 03, 2025 | |
| Accounting Policies [Abstract] | |
| Consolidation | We have a controlling interest in Hanford Mission Integration Solutions, LLC ("HMIS"), the legal entity for the follow-on contract to Mission Support Alliance, LLC's ("MSA") contract and a joint venture with Centerra Group, LLC and Parsons Government Services, Inc. During the quarter ended July 4, 2025, we dissolved our controlling interest in MSA. The financial results for HMIS are consolidated into our unaudited condensed consolidated financial statements. The unaudited condensed consolidated financial statements also include the balances of all voting interest entities in which Leidos has a controlling voting interest ("subsidiaries") and a variable interest entity ("VIE") in which Leidos is the primary beneficiary. The consolidated balances of the VIE are not material to the unaudited condensed consolidated financial statements for the periods presented. Intercompany accounts and transactions between consolidated companies have been eliminated in consolidation. |
| Basis of Accounting | The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the rules of the U.S. Securities and Exchange Commission and accounting principles generally accepted in the United States of America ("GAAP"). Certain disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules. |
| Estimates | The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions 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 revenues and expenses during the reporting periods. Management evaluates these estimates and assumptions on an ongoing basis, including those relating to estimated profitability of long-term contracts, indirect billing rates, allowances for doubtful accounts, inventories, right-of-use assets and lease liabilities, fair value and impairment of intangible assets and goodwill, income taxes, stock-based compensation expense and contingencies. These estimates have been prepared by management on the basis of the most current and best available information; however, actual results could differ materially from those estimates. Certain amounts in the prior year financial statements have been reclassified to conform to the current year presentation. We disaggregated "Deferred tax assets" from "Other long-term assets" and "Deferred tax liabilities" from "Other long-term liabilities" on the condensed consolidated balance sheets. Additionally, we combined "Net proceeds from sale of assets" into "Other" within net cash used in investing activities on the condensed consolidated statements of cash flows. We changed our Cash and Cash Equivalents policy to exclude outstanding payments from “Cash and cash equivalents” on the condensed consolidated balance sheets. Prior year financial information has been updated to conform to our current presentation on the condensed consolidated balance sheet and condensed consolidated statement of cash flows. See the Cash and Cash Equivalents section below for further discussion of the change and the impact on the financial statements.
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| Accounting Standards Updates Issued But Not Yet Adopted | ACCOUNTING STANDARDS UPDATES ISSUED BUT NOT YET ADOPTED ASU 2023-09 Income Taxes In December 2023, the FASB issued ASU 2023-09, to enhance the transparency and usefulness of income tax disclosures. The update requires enhancements to the annual rate reconciliation, including disclosure of specific categories and additional information for reconciling items meeting a quantitative threshold. The update also requires disclosure of income taxes paid disaggregated by federal, state and foreign taxes, and individual jurisdictions meeting a quantitative threshold. The amendments in this update are effective for public business entities for annual periods beginning after December 15, 2024, and may be adopted on a prospective or retrospective basis. Early adoption is permitted. We plan to adopt these amendments using the prospective approach for annual disclosures in fiscal 2025 and do not expect them to have a material impact on our consolidated financial statements and related disclosures. ASU 2024-03 Disaggregation of Income Statement Expenses In November 2024, the FASB issued ASU 2024-03, to enhance the transparency of certain expense disclosures. The update requires disclosure of specific expense categories in the notes to the financial statements at interim and annual reporting periods. The update requires disaggregated information about certain prescribed expense categories underlying any relevant income statement expense caption. The amendments in this update are effective for public entities for annual periods beginning after December 15, 2026, and interim periods beginning after December 15, 2027. The amendments may be adopted either prospectively or retrospectively. Early adoption is permitted. We are currently evaluating the impacts of this update and plan to adopt these amendments for annual disclosures in fiscal 2027 and interim disclosures in fiscal 2028. ASU 2025-06 Intangibles - Goodwill and Other-Internal-Use Software In September 2025, the FASB issued ASU 2025-06 which amends certain aspects of the accounting and disclosure of Internal use software costs. Current guidance requires capitalization of internal-use software development costs depending on the nature of the costs and the project stage during which they occur. The amendments in this update remove references to prescriptive and sequential software development stages and require entities to start capitalizing software development costs when a) management authorizes and commits to funding the software project, and b) it is probable that the project will be completed, and the software will be used to perform the intended function. The amendments in this update are effective for public business entities for annual periods beginning after December 15, 2027, including interim periods within those annual reporting periods, and may be adopted on a prospective, modified or retrospective basis. Early adoption is permitted. We are currently evaluating the impacts of this update and plan to adopt these amendments using the prospective approach in fiscal 2026. We do not expect them to have a material impact on our consolidated financial statements and related disclosures.
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| Changes in Estimates on Contracts | CHANGES IN ESTIMATES ON CONTRACTS Changes in estimates related to contracts accounted for using the cost-to-cost method of accounting are recognized in the period in which such changes are made for the inception-to-date effect of the changes, with the exception of contracts acquired through a business combination, where the adjustment is made for the period commencing from the date of acquisition. The impact on diluted earnings per share ("EPS") attributable to Leidos common stockholders is calculated using the statutory tax rate.
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| Cash and Cash Equivalents | CASH AND CASH EQUIVALENTS Our cash equivalents are primarily comprised of investments in several large institutional money market accounts, with original maturity of three months or less. Effective as of the first quarter of fiscal 2025, we changed our policy to exclude outstanding payments from “Cash and cash equivalents” on the condensed consolidated balance sheets. To reflect the change in accounting policy, we recast "Cash and cash equivalents" and "Accounts payable and accrued liabilities" on the condensed consolidated balance sheet as of January 3, 2025, reducing both balances by $94 million from the previously reported amounts. The recast of the condensed consolidated statement of cash flows for the nine months ended September 27, 2024, resulted in an increase of $48 million to net cash provided by operations. We believe this presentation enhances the usefulness of financial reporting and enhances comparability to align with industry practice. There is no impact to our condensed consolidated statements of operations, including EPS, condensed consolidated statements of comprehensive income, or condensed consolidated statements of equity. All periods presented have been adjusted.
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| Restricted Cash | RESTRICTED CASH We have restricted cash balances, primarily representing advances from customers that are restricted for use on certain expenditures related to that customer's contract. Restricted cash balances are included as "Other current assets" in the condensed consolidated balance sheets.
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