Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
Mar. 29, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The condensed consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") and should be read in conjunction with the audited consolidated financial statements, and the notes to those statements, included in the Company's Form 10-K filed with the SEC on November 21, 2023. The Condensed Consolidated Balance Sheet as of September 29, 2023 was derived from audited financial statements which have been prepared in accordance with generally accepted accounting principles in the United States ("U.S. GAAP"). Certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. In the opinion of the Company, the statements include all adjustments, which are of a normal, recurring nature, required for a fair presentation for the periods presented. The results of operations for interim periods are not necessarily indicative of the results for a full year, due to the seasonality of some of the Company's business activities and the possibility of changes in general economic conditions. The condensed consolidated financial statements include the accounts of the Company and all of its subsidiaries in which a controlling financial interest is maintained. All intercompany transactions and accounts have been eliminated.
New Accounting Standard Updates	New Accounting Standards Updates Adopted Standards (from most to least recent date of issuance) In September 2022, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2022-04 Liabilities - Supplier Finance Programs (Subtopic 405-50) to enhance the transparency of supplier finance programs, which may be referred to as reverse factoring, payables finance or structured payables arrangements. The guidance requires that a buyer in a supplier finance program disclose the program's nature, activity and potential magnitude. The guidance was effective for the Company in the first quarter of fiscal 2024. The Company reviewed existing supplier finance agreements and enhanced disclosures with qualitative and quantitative information about its supplier finance program, but the adoption of this guidance did not have a material impact on the condensed consolidated financial statements. In October 2021, the FASB issued ASU 2021-08 Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers which required that an entity (acquirer) recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Accounting Standards Codification 606, Revenue from Contracts with Customers ("ASC 606") as if it had originated the contracts. The guidance was effective for the Company in the first quarter of fiscal 2024. The adoption of this guidance did not have a material impact on the condensed consolidated financial statements. Standards Not Yet Adopted (from most to least recent date of issuance) In March 2024, the SEC adopted final climate-related disclosure rules under SEC Release Nos. 33-11275 and 34-99678, The Enhancement and Standardization of Climate-Related Disclosures for Investors. The rules require disclosure of governance, risk management and strategy related to material climate-related risks as well as disclosure of material greenhouse gas emissions in registration statements and annual reports. In addition, the rules require presentation of certain material climate-related disclosures in the annual consolidated financial statements. On April 4, 2024, the SEC voluntarily stayed the effective date of the final rules pending completion of judicial review following legal challenges. The disclosure requirements will apply to the Company's fiscal year reporting beginning October 4, 2025, pending resolution of the stay. The Company is currently evaluating the impact of the rules on the Company’s disclosures. In December 2023, the FASB issued ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures to enhance the transparency and decision usefulness of income tax disclosures. The guidance will require improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. The guidance is effective for the Company's annual disclosures for fiscal 2026 and early adoption is permitted. The Company is currently evaluating the impact of this standard. In November 2023, the FASB issued ASU 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures to enhance the reportable segment disclosures. The guidance will require additional disclosures about significant segment expenses. The guidance is effective for the Company's annual disclosures for fiscal 2025 and early adoption is permitted. The Company is currently evaluating the impact of this standard. Other new accounting pronouncements recently issued or newly effective were not applicable to the Company, did not have a material impact on the condensed consolidated financial statements or are not expected to have a material impact on the condensed consolidated financial statements.
Comprehensive Income	Comprehensive Income Comprehensive income includes all changes to stockholders' equity during a period, except those resulting from investments by and distributions to stockholders. Components of comprehensive income include net income, changes in foreign currency translation adjustments (net of tax), changes in the fair value of cash flow hedges (net of tax) and changes to the share of any equity investees' comprehensive income (loss) (net of tax).
Currency Translation	Currency Translation Gains and losses resulting from the translation of financial statements of non-United States subsidiaries are reflected as a component of accumulated other comprehensive loss in stockholder's equity. Beginning in fiscal 2018, Argentina was determined to have a highly inflationary economy. As a result, the Company remeasures the financial statements of Argentina's operations in accordance with the accounting guidance for highly inflationary economies. The impact of the Argentina remeasurement was a foreign currency transaction loss of $0.9 million and $4.8 million during the three and six month periods ended March 29, 2024. The impact of the Argentina remeasurement was a foreign currency transaction loss of $2.8 million and $3.9 million during the three and six month periods ended March 31, 2023. The impact of foreign currency transaction gains and losses exclusive of Argentina's operations included in the Company's operating results during the three and six month periods of both fiscal 2024 and 2023 were immaterial to the condensed consolidated financial statements.
Current Assets	Current Assets The Company insures portions of its risk in general liability, automobile liability, workers’ compensation liability claims as well as certain property damage risks through a wholly owned captive insurance subsidiary (the "Captive") as part of its approach to risk finance. The Captive is subject to regulations within its domicile of Bermuda, including regulations established by the Bermuda Monetary Authority (the "BMA") relating to levels of liquidity and solvency as such concepts are defined by the BMA. The Captive was in compliance with these regulations as of March 29, 2024. These regulations may have the effect of limiting the Company's ability to access certain cash and cash equivalents held by the Captive for uses other than for the payment of its general liability, automobile liability, workers' compensation liability, certain property damage and related Captive costs. Within the FSS International segment, the Company receives certain cash on behalf of the Company's clients, which is contractually restricted from withdrawal and usage. This restricted cash is recorded in "Prepayments and other current assets" on the Condensed Consolidated Balance Sheets.
Property and Equipment and Operating Lease Right-of-use Assets	Property and Equipment and Operating Lease Right-of-use Assets During fiscal 2023, the Company completed a strategic review of certain administrative locations, taking into account facility capacity and current utilization, among other factors. Based on this review, the Company vacated or otherwise reduced its usage at certain of these locations, resulting in an analysis of the recoverability of the assets associated with the locations. As a result, for the three and six months ended March 31, 2023, the Company recorded an impairment charge of $0.7 million and $19.0 million within its FSS United States segment, which is included in "Cost of services provided (exclusive of depreciation and amortization)" on the Condensed Consolidated Statements of Income. For the three and six months ended March 31, 2023, the non-cash impairment charges within the FSS United States segment consisted of operating lease right-of-use assets of $0.7 million and $8.6 million, respectively, and property and equipment of zero and $10.4 million, respectively.
Other Assets	Other Assets Other assets consist primarily of costs to obtain or fulfill contracts (including employee sales commissions), long-term receivables, investments in 50% or less owned entities and computer software costs. For investments in 50% or less owned entities accounted for under the equity method of accounting, the carrying amount as of March 29, 2024 and September 29, 2023 was $71.6 million and $73.5 million, respectively. For investments in 50% or less owned entities, other than those accounted for under the equity method of accounting, the Company measures these investments at cost, less any impairment and adjusted for changes in fair value resulting from observable price changes for an identical or a similar investment of the same issuer due to the lack of readily available fair values related to those investments. The carrying amount of equity investments without readily determinable fair values as of both March 29, 2024 and September 29, 2023 was $83.6 million.
Other Current and Noncurrent Liabilities	Other Current and Noncurrent Liabilities The Company is self-insured for certain obligations related to its employee health care benefit programs as well as for certain risks retained under its general liability, automobile liability, workers' compensation liability and certain property damage programs. Reserves for these programs are estimated through actuarial methods, with the assistance of third-party actuaries using loss development assumptions based on the Company's claims history.
Fair Value of Financial Instruments	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities recorded at fair value are classified based upon the level of judgment associated with the inputs used to measure their fair value. The hierarchical levels related to the subjectivity of the valuation inputs are defined as follows: • Level 1—inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets • Level 2—inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument • Level 3—inputs to the valuation methodology are unobservable and significant to the fair value measurement Recurring Fair Value Measurements The Company's financial instruments consist primarily of cash and cash equivalents, accounts receivable, accounts payable, borrowings and derivatives. Management believes that the carrying value of cash and cash equivalents, accounts receivable and accounts payable are representative of their respective fair values. In conjunction with the fair value measurement of the derivative instruments, the Company made an accounting policy election to measure the credit risk of its derivative instruments that are subject to master netting agreements on a net basis by counterparty portfolio, as the gross values would not be materially different.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Mar. 29, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The condensed consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") and should be read in conjunction with the audited consolidated financial statements, and the notes to those statements, included in the Company's Form 10-K filed with the SEC on November 21, 2023. The Condensed Consolidated Balance Sheet as of September 29, 2023 was derived from audited financial statements which have been prepared in accordance with generally accepted accounting principles in the United States ("U.S. GAAP"). Certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. In the opinion of the Company, the statements include all adjustments, which are of a normal, recurring nature, required for a fair presentation for the periods presented. The results of operations for interim periods are not necessarily indicative of the results for a full year, due to the seasonality of some of the Company's business activities and the possibility of changes in general economic conditions.

The condensed consolidated financial statements include the accounts of the Company and all of its subsidiaries in which a controlling financial interest is maintained. All intercompany transactions and accounts have been eliminated.

New Accounting Standard Updates

New Accounting Standards Updates

Adopted Standards (from most to least recent date of issuance)

In September 2022, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") 2022-04 Liabilities - Supplier Finance Programs (Subtopic 405-50) to enhance the transparency of supplier finance programs, which may be referred to as reverse factoring, payables finance or structured payables arrangements. The guidance requires that a buyer in a supplier finance program disclose the program's nature, activity and potential magnitude. The guidance was effective for the Company in the first quarter of fiscal 2024. The Company reviewed existing supplier finance agreements and enhanced disclosures with qualitative and quantitative information about its supplier finance program, but the adoption of this guidance did not have a material impact on the condensed consolidated financial statements.

In October 2021, the FASB issued ASU 2021-08 Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers which required that an entity (acquirer) recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Accounting Standards Codification 606, Revenue from Contracts with Customers ("ASC 606") as if it had originated the contracts. The guidance was effective for the Company in the first quarter of fiscal 2024. The adoption of this guidance did not have a material impact on the condensed consolidated financial statements.

Standards Not Yet Adopted (from most to least recent date of issuance)

In March 2024, the SEC adopted final climate-related disclosure rules under SEC Release Nos. 33-11275 and 34-99678, The Enhancement and Standardization of Climate-Related Disclosures for Investors. The rules require disclosure of governance, risk management and strategy related to material climate-related risks as well as disclosure of material greenhouse gas emissions in registration statements and annual reports. In addition, the rules require presentation of certain material climate-related disclosures in the annual consolidated financial statements. On April 4, 2024, the SEC voluntarily stayed the effective date of the final rules pending completion of judicial review following legal challenges. The disclosure requirements will apply to the Company's fiscal year reporting beginning October 4, 2025, pending resolution of the stay. The Company is currently evaluating the impact of the rules on the Company’s disclosures.

In December 2023, the FASB issued ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures to enhance the transparency and decision usefulness of income tax disclosures. The guidance will require improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. The guidance is effective for the Company's annual disclosures for fiscal 2026 and early adoption is permitted. The Company is currently evaluating the impact of this standard.

In November 2023, the FASB issued ASU 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures to enhance the reportable segment disclosures. The guidance will require additional disclosures about significant segment expenses. The guidance is effective for the Company's annual disclosures for fiscal 2025 and early adoption is permitted. The Company is currently evaluating the impact of this standard.

Other new accounting pronouncements recently issued or newly effective were not applicable to the Company, did not have a material impact on the condensed consolidated financial statements or are not expected to have a material impact on the condensed consolidated financial statements.

Comprehensive Income

Comprehensive income includes all changes to stockholders' equity during a period, except those resulting from investments by and distributions to stockholders. Components of comprehensive income include net income, changes in foreign currency translation adjustments (net of tax), changes in the fair value of cash flow hedges (net of tax) and changes to the share of any equity investees' comprehensive income (loss) (net of tax).

Currency Translation

Gains and losses resulting from the translation of financial statements of non-United States subsidiaries are reflected as a component of accumulated other comprehensive loss in stockholder's equity. Beginning in fiscal 2018, Argentina was determined to have a highly inflationary economy. As a result, the Company remeasures the financial statements of Argentina's operations in accordance with the accounting guidance for highly inflationary economies. The impact of the Argentina remeasurement was a foreign currency transaction loss of $0.9 million and $4.8 million during the three and six month periods ended March 29, 2024. The impact of the Argentina remeasurement was a foreign currency transaction loss of $2.8 million and $3.9 million during the three and six month periods ended March 31, 2023. The impact of foreign currency transaction gains and losses exclusive of Argentina's operations included in the Company's operating results during the three and six month periods of both fiscal 2024 and 2023 were immaterial to the condensed consolidated financial statements.

Current Assets

The Company insures portions of its risk in general liability, automobile liability, workers’ compensation liability claims as well as certain property damage risks through a wholly owned captive insurance subsidiary (the "Captive") as part of its approach to risk finance. The Captive is subject to regulations within its domicile of Bermuda, including regulations established by the Bermuda Monetary Authority (the "BMA") relating to levels of liquidity and solvency as such concepts are defined by the BMA. The Captive was in compliance with these regulations as of March 29, 2024. These regulations may have the effect of limiting the Company's ability to access certain cash and cash equivalents held by the Captive for uses other than for the payment of its general liability, automobile liability, workers' compensation liability, certain property damage and related Captive costs.

Within the FSS International segment, the Company receives certain cash on behalf of the Company's clients, which is contractually restricted from withdrawal and usage. This restricted cash is recorded in "Prepayments and other current assets" on the Condensed Consolidated Balance Sheets.

Property and Equipment and Operating Lease Right-of-use Assets

During fiscal 2023, the Company completed a strategic review of certain administrative locations, taking into account facility capacity and current utilization, among other factors. Based on this review, the Company vacated or otherwise reduced its usage at certain of these locations, resulting in an analysis of the recoverability of the assets associated with the locations. As a result, for the three and six months ended March 31, 2023, the Company recorded an impairment charge of $0.7 million and $19.0 million within its FSS United States segment, which is included in "Cost of services provided (exclusive of depreciation and amortization)" on the Condensed Consolidated Statements of Income. For the three and six months ended March 31, 2023, the non-cash impairment charges within the FSS United States segment consisted of operating lease right-of-use assets of $0.7 million and $8.6 million, respectively, and property and equipment of zero and $10.4 million, respectively.

Other Assets

Other assets consist primarily of costs to obtain or fulfill contracts (including employee sales commissions), long-term receivables, investments in 50% or less owned entities and computer software costs.

For investments in 50% or less owned entities accounted for under the equity method of accounting, the carrying amount as of March 29, 2024 and September 29, 2023 was $71.6 million and $73.5 million, respectively.

For investments in 50% or less owned entities, other than those accounted for under the equity method of accounting, the Company measures these investments at cost, less any impairment and adjusted for changes in fair value resulting from

observable price changes for an identical or a similar investment of the same issuer due to the lack of readily available fair values related to those investments. The carrying amount of equity investments without readily determinable fair values as of both March 29, 2024 and September 29, 2023 was $83.6 million.

Other Current and Noncurrent Liabilities

The Company is self-insured for certain obligations related to its employee health care benefit programs as well as for certain risks retained under its general liability, automobile liability, workers' compensation liability and certain property damage programs. Reserves for these programs are estimated through actuarial methods, with the assistance of third-party actuaries using loss development assumptions based on the Company's claims history.

Fair Value of Financial Instruments

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities recorded at fair value are classified based upon the level of judgment associated with the inputs used to measure their fair value. The hierarchical levels related to the subjectivity of the valuation inputs are defined as follows:

• Level 1—inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets

• Level 2—inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument

• Level 3—inputs to the valuation methodology are unobservable and significant to the fair value measurement

Recurring Fair Value Measurements

The Company's financial instruments consist primarily of cash and cash equivalents, accounts receivable, accounts payable, borrowings and derivatives. Management believes that the carrying value of cash and cash equivalents, accounts receivable and accounts payable are representative of their respective fair values. In conjunction with the fair value measurement of the derivative instruments, the Company made an accounting policy election to measure the credit risk of its derivative instruments that are subject to master netting agreements on a net basis by counterparty portfolio, as the gross values would not be materially different.