Basis of Presentation	6 Months Ended
Mar. 27, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Unless the context otherwise requires: •References herein to “Jacobs” are to Jacobs Solutions Inc. and its predecessors; •References herein to the “Company”, “we”, “us” or “our” are to Jacobs Solutions Inc. and its consolidated subsidiaries; and •References herein to the “Group” are to the combined economic interests and activities of the Company and the persons and entities holding noncontrolling interests in our consolidated subsidiaries. On August 29, 2022, Jacobs Engineering Group Inc. ("JEGI"), the predecessor to Jacobs Solutions Inc., implemented a holding company structure, which resulted in Jacobs Solutions Inc. becoming the parent company of, and successor issuer to, JEGI (the "Holding Company Reorganization"). For purposes of this report, references to Jacobs and the "Company", "we", "us" or "our" or our management or business at any point prior to August 29, 2022 refer to JEGI, or JEGI and its consolidated subsidiaries as the predecessor to Jacobs Solutions Inc. The accompanying consolidated financial statements and financial information included herein have been prepared pursuant to the interim period reporting requirements of Form 10-Q. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) have been condensed or omitted. Readers of this Quarterly Report on Form 10-Q should also read our consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended September 26, 2025 (“2025 Form 10-K”). In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of our consolidated financial statements as of March 27, 2026, and for the three and six months ended March 27, 2026. Our interim results of operations are not necessarily indicative of the results to be expected for the full fiscal year. On January 2, 2026, Jacobs entered into an Implementation Deed (the “Implementation Deed”) with PA Consulting. Pursuant to the Implementation Deed and certain related agreements, and in accordance with the terms and conditions thereof, on March 20, 2026, Jacobs completed the transaction to acquire from shareholders of PA Consulting all of the remaining issued share capital of PA Consulting ("PA Shares") owned by the PA Consulting shareholders (excluding shares already held by Jacobs and its affiliates). The Company acquired the PA Shares for an aggregate initial consideration of approximately £1.21 billion which was paid through a combination of approximately £997.6 million in cash (net of certain PA Consulting shareholder expenses) and 2,043,537 newly issued shares of Jacobs' common stock, par value $1.00 per share (“Company Common Stock”). Also, on March 20, 2028, the Company will pay an additional £75 million in consideration with shares of Company Common Stock, cash or a combination thereof (as determined by the Company in its sole discretion), with accruals associated with this additional consideration reflected in Other deferred liabilities on the Consolidated Balance Sheet as of March 27, 2026. The transactions described in this paragraph, are collectively referred to as the “PA Consulting Transaction”. As a result of the PA Consulting Transaction, the Company no longer carries Redeemable Noncontrolling Interests on the Jacobs Consolidated Financial Statements. See Note 15- PA Consulting Redeemable Noncontrolling Interests for more discussion on the transaction and Note 12- Borrowings for more discussion on the financing for the transaction. 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. See Note 14- Discontinued Operations for more information.

On August 29, 2022, Jacobs Engineering Group Inc. ("JEGI"), the predecessor to Jacobs Solutions Inc., implemented a holding company structure, which resulted in Jacobs Solutions Inc. becoming the parent company of, and successor issuer to, JEGI (the "Holding Company Reorganization"). For purposes of this report, references to Jacobs and the "Company", "we", "us" or "our" or our management or business at any point prior to August 29, 2022 refer to JEGI, or JEGI and its consolidated subsidiaries as the predecessor to Jacobs Solutions Inc.

The accompanying consolidated financial statements and financial information included herein have been prepared pursuant to the interim period reporting requirements of Form 10-Q. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) have been condensed or omitted. Readers of this Quarterly Report on Form 10-Q should also read our consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended September 26, 2025 (“2025 Form 10-K”).

On January 2, 2026, Jacobs entered into an Implementation Deed (the “Implementation Deed”) with PA Consulting. Pursuant to the Implementation Deed and certain related agreements, and in accordance with the terms and conditions thereof, on March 20, 2026, Jacobs completed the transaction to acquire from shareholders of PA Consulting all of the remaining issued share capital of PA Consulting ("PA Shares") owned by the PA Consulting shareholders (excluding shares already held by Jacobs and its affiliates). The Company acquired the PA Shares for an aggregate initial consideration of approximately £1.21 billion which was paid through a combination of approximately £997.6 million in cash (net of certain PA Consulting shareholder expenses) and 2,043,537 newly issued shares of Jacobs' common stock, par value $1.00 per share (“Company Common Stock”). Also, on March 20, 2028, the Company will pay an additional £75 million in consideration with shares of Company Common Stock, cash or a combination thereof (as determined by the Company in its sole discretion), with accruals associated with this additional consideration reflected in Other deferred liabilities on the Consolidated Balance Sheet as of March 27, 2026. The transactions described in this paragraph, are collectively referred to as the “PA Consulting Transaction”. As a result of the PA Consulting Transaction, the Company no longer carries Redeemable Noncontrolling Interests on the Jacobs Consolidated Financial Statements. See Note 15- PA Consulting Redeemable Noncontrolling Interests for more discussion on the transaction and Note 12- Borrowings for more discussion on the financing for the transaction.

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. See Note 14- Discontinued Operations for more information.