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Description of Business and Basis of Presentation
 12 Months Ended
Sep. 26, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Description of Business and Basis of Presentation Description of Business and Basis of Presentation
Description of Business
Jacobs Solutions Inc. ("Jacobs" or "the Company") is a leading global professional services company that designs and deploys technology-centric solutions to solve many of the world’s most complex challenges. The services Jacobs provides to end markets fall into the following two operating segments: Infrastructure & Advanced Facilities and our investment in PA Consulting Group Limited ("PA Consulting"). See Note 19- Segment Information.
From advisory and consulting, feasibility, planning, design, program and lifecycle management, Jacobs provides end-to-end services in advanced manufacturing, cities & places, energy, environmental, life sciences, transportation and water. Jacobs provides its services through offices and subsidiaries located primarily in North America, Europe, the Middle East, India, Australia, New Zealand and Asia. Jacobs provides its services under cost-reimbursable (including limited amounts of guaranteed maximum price) and fixed-price contracts, with fixed-price contracts comprised mainly of professional services arrangements and in some limited cases, construction. The percentage of revenues realized from each of these types of contracts for the fiscal years ended September 26, 2025, September 27, 2024 and September 29, 2023 was as follows:
 For the Years Ended
 September 26, 2025September 27, 2024 September 29, 2023
Cost-reimbursable68%69%70%
Fixed-price32%31%30%
Basis of Presentation, Definition of Fiscal Year, and Other Matters
The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") and include the accounts of Jacobs Solutions Inc. and its subsidiaries and affiliates which it controls. All intercompany accounts and transactions have been eliminated in consolidation.
The Company’s fiscal year ends on the Friday closest to September 30 (determined on the basis of the number of workdays) and, accordingly, an additional week of activity is added every five-to-six years. Fiscal 2020 included an extra week of activity.
On September 27, 2024, Jacobs Solutions Inc. ("Jacobs") completed the previously announced Reverse Morris Trust transaction pursuant to which (i) Jacobs first transferred its Critical Mission Solutions business (“CMS”) and portions of its Divergent Solutions (“DVS”) business (referred to herein as the Cyber & Intelligence business (“C&I”) and together with CMS referred to as the “SpinCo Business”), to Amazon Holdco Inc., a Delaware corporation, that was subsequently renamed Amentum Holdings, Inc. (“SpinCo”) (the “Separation”), (ii) Jacobs then effectuated a spin-off of SpinCo by distributing 124,084,108 shares of SpinCo common stock, par value $0.01 per share (the “SpinCo Common Stock”) by way of a pro rata distribution to its shareholders such that each holder of shares of Jacobs Common Stock, par value $1.00 per share, (the “Jacobs Common Stock”) was entitled to receive one share of SpinCo Common Stock for each share of Jacobs common stock held as of the record date, September 23, 2024 (the “Distribution”), and (iii) finally, Amentum Parent Holdings LLC merged with and into SpinCo, with SpinCo surviving the merger (the “Merger” and together with the Separation and the Distribution, the “Separation Transaction”).
As a result of the Separation, substantially all SpinCo Business-related assets and liabilities have been separated and distributed (the "Disposal Group"). The Company determined that the Disposal Group should be reported as discontinued operations in accordance with ASC 205-20, Discontinued Operations because their disposal represents a strategic shift that had a major effect on the Company's operations and financial results. As such, the financial results of the SpinCo Business are reflected in the Company's Consolidated Statements of Earnings as well as relevant disclosures as discontinued operations for all periods presented. Additionally, current and non-current assets and liabilities of the Disposal Group were reflected as held for spin in the Consolidated Balance Sheets prior to the Separation Transaction and no amounts remain held for spin as of September 27, 2024 and September 26, 2025. See Note 14- Discontinued Operations for more information.