Kelly Services (KELYA) 10-K 13 Feb 25 2024 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Feb. 02, 2025	Jun. 30, 2024
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-29
Document Period End Date	Dec. 29, 2024
Document Transition Report	false
Entity File Number	0-1088
Entity Registrant Name	KELLY SERVICES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	38-1510762
Entity Address, Address Line One	999 West Big Beaver Road
Entity Address, City or Town	Troy
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48084
City Area Code	248
Local Phone Number	362-4444
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 677
Documents Incorporated by Reference	Portions of the proxy statement of the registrant with respect to its 2025 Annual Meeting of Stockholders are incorporated by reference in Part III of this Form 10-K to the extent described herein.
Amendment Flag	false
Entity Central Index Key	0000055135
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Detroit, Michigan
Auditor Firm ID	238
Class A common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		31,592,205
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,295,841
NASDAQ Global Market | Class A common stock
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock, $1.00 par value per share
Trading Symbol	KELYA
Security Exchange Name	NASDAQ
NASDAQ Global Market | Class B common stock
Document Information [Line Items]
Title of 12(b) Security	Class B Common Stock, $1.00 par value per share
Trading Symbol	KELYB
Security Exchange Name	NASDAQ

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Income Statement [Abstract]
Revenue from services	$ 4,331.8	$ 4,835.7	$ 4,965.4
Cost of services	3,449.2	3,874.3	3,953.6
Gross profit	882.6	961.4	1,011.8
Selling, general and administrative expenses	818.4	934.7	943.5
Asset impairment charge	13.5	2.4	0
Goodwill impairment charge	72.8	0	41
Gain on sale of EMEA staffing operations	(1.6)	0	0
Gain on sale of assets	(5.4)	0	(6.2)
Loss on disposal	0	0	18.7
Earnings (loss) from operations	(15.1)	24.3	14.8
Loss on investment in Persol Holdings	0	0	(67.2)
Loss on currency translation from liquidation of subsidiary	0	0	(20.4)
Other income (expense), net	(6.8)	0.6	1.6
Earnings (loss) before taxes and equity in net earnings of affiliate	(21.9)	24.9	(71.2)
Income tax benefit	(21.3)	(11.5)	(7.9)
Net earnings (loss) before equity in net earnings of affiliate	(0.6)	36.4	(63.3)
Equity in net earnings of affiliate	0	0	0.8
Net earnings (loss)	$ (0.6)	$ 36.4	$ (62.5)
Basic earnings (loss) per share (in dollars per share)	$ (0.02)	$ 0.99	$ (1.64)
Diluted earnings (loss) per share (in dollars per share)	$ (0.02)	$ 0.98	$ (1.64)
Average shares outstanding (millions):
Basic (in shares)	35.5	35.9	38.1
Diluted (in shares)	35.5	36.3	38.1

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ (0.6)	$ 36.4	$ (62.5)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax benefit of $0.2 million, $0.0 million and $0.2 million, respectively	(6.9)	8	(7.5)
Less: Reclassification adjustments included in net earnings (loss) - liquidation of Japan subsidiary	0	0	20.4
Less: Reclassification adjustments included in net earnings (loss) - equity method investment and other	(0.6)	0	4.7
Foreign currency translation adjustments	(7.5)	8	17.6
Pension liability adjustments, net of tax benefit of $0.4 million, and net of tax expense of $0.2 million and $0.5 million, respectively	0	0.6	1.5
Less: Reclassification adjustments included in net earnings	0.4	0.1	0.1
Pension liability adjustments	0.4	0.7	1.6
Other comprehensive income (loss), net of tax	(7.1)	8.7	19.2
Comprehensive income (loss)	$ (7.7)	$ 45.1	$ (43.3)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax expense (benefit)	$ (0.2)	$ 0	$ (0.2)
Pension liability adjustments, tax expense (benefit)	$ (0.4)	$ 0.2	$ 0.5

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Current Assets
Cash and equivalents	$ 39	$ 125.8
Trade accounts receivable, less allowances of $8.4 for both years	1,255.5	1,160.6
Prepaid expenses and other current assets	71	48.9
Assets held for sale	0	291.3
Total current assets	1,365.5	1,626.6
Property and equipment:
Property and equipment	140	138.1
Accumulated depreciation	(114.2)	(113.5)
Net property and equipment	25.8	24.6
Operating lease right-of-use assets	47	47.1
Deferred taxes	330.1	321.1
Retirement plan assets	258.1	230.3
Goodwill, net	304.2	151.1
Intangibles, net	256.3	137.7
Other assets	45.3	43.1
Total noncurrent assets	1,266.8	955
Total Assets	2,632.3	2,581.6
Current Liabilities
Accounts payable and accrued liabilities	613.8	646.1
Operating lease liabilities	12.3	8.4
Accrued payroll and related taxes	163.9	156.2
Accrued workers' compensation and other claims	19	22.1
Income and other taxes	17.5	17.2
Liabilities held for sale	0	169.9
Total current liabilities	826.5	1,019.9
Noncurrent Liabilities
Long-term debt	239.4	0
Operating lease liabilities	50.9	42.9
Accrued workers' compensation and other claims	33.8	40.9
Accrued retirement benefits	239.9	217.4
Other long-term liabilities	7.2	6.8
Total noncurrent liabilities	571.2	308
Commitments and contingencies (See Commitments and Contingencies footnotes)
Treasury stock, at cost
Paid-in capital	34.2	30.6
Earnings invested in the business	1,230.2	1,241.7
Accumulated other comprehensive income (loss)	(6.9)	0.2
Total stockholders' equity	1,234.6	1,253.7
Total Liabilities and Stockholders' Equity	2,632.3	2,581.6
Class A common stock
Capital stock, $1.00 par value
Common stock, value	35.2	35.2
Treasury stock, at cost
Treasury stock, value	(60.8)	(56.7)
Class B common stock
Capital stock, $1.00 par value
Common stock, value	3.3	3.3
Treasury stock, at cost
Treasury stock, value	$ (0.6)	$ (0.6)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Allowance for trade accounts receivable	$ 8.4	$ 8.4
Class A common stock
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	35,200,000	35,200,000
Treasury stock, Class A shares (in shares)	3,600,000	3,200,000
Class B common stock
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	3,300,000	3,300,000

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock Class A common stock, Capital Stock	Common Stock Class B common stock, Capital Stock	Treasury Stock Class A common stock, Treasury Stock	Treasury Stock Class B common stock, Treasury Stock	Paid-in Capital	Earnings Invested in the Business	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of year at Jan. 02, 2022		$ 36.7	$ 3.4	$ (14.5)	$ (0.6)	$ 23.9	$ 1,315	$ (27.7)
Increase (Decrease) in Stockholders' Equity
Conversions of stock		0	0
Net issuance of stock awards and other				2.8	0	4.1
Purchase of treasury stock				(7.8)
Net earnings (loss)	$ (62.5)						(62.5)
Dividends							(10.6)
Share retirement		(1.6)					(25.6)
Other comprehensive income (loss), net of tax	19.2							19.2
Balance at end of year at Jan. 01, 2023	1,254.2	35.1	3.4	(19.5)	(0.6)	28	1,216.3	(8.5)
Increase (Decrease) in Stockholders' Equity
Conversions of stock		0.1	(0.1)
Net issuance of stock awards and other				5	0	2.6
Purchase of treasury stock				(42.2)
Net earnings (loss)	36.4						36.4
Dividends							(11)
Share retirement		0					0
Other comprehensive income (loss), net of tax	8.7							8.7
Balance at end of year at Dec. 31, 2023	1,253.7	35.2	3.3	(56.7)	(0.6)	30.6	1,241.7	0.2
Increase (Decrease) in Stockholders' Equity
Conversions of stock		0	0
Net issuance of stock awards and other				5.9	0	3.6
Purchase of treasury stock				(10)
Net earnings (loss)	(0.6)						(0.6)
Dividends							(10.9)
Share retirement		0					0
Other comprehensive income (loss), net of tax	(7.1)							(7.1)
Balance at end of year at Dec. 29, 2024	$ 1,234.6	$ 35.2	$ 3.3	$ (60.8)	$ (0.6)	$ 34.2	$ 1,230.2	$ (6.9)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 29, 2024		Dec. 31, 2023		Jan. 01, 2023
Cash flows from operating activities:
Net earnings (loss)		$ (0.6)		$ 36.4		$ (62.5)
Adjustments to reconcile net earnings to net cash from operating activities:
Asset impairment charge		13.5		2.4		0
Goodwill impairment charge		72.8		0		41
Deferred income taxes		(27.8)		(24.9)		(72.1)
Loss on disposal		0		0		18.7
Depreciation and amortization		40.2		33.9		33.4
Operating lease asset amortization		10.7		16.2		18.5
Provision for credit losses and sales allowances		(0.1)		1.6		1.5
Stock-based compensation		11.8		9.7		7.8
Gain on sale of equity securities		(0.6)		(2)		0
(Gain) loss on forward contract		(1.2)		3.6		0
Gain on sale of EMEA staffing operations		(1.6)		0		0
Gain on sale of assets		(5.4)		0		(6.2)
Loss on investment in Persol Holdings		0		0		67.2
Loss on currency translation from liquidation of subsidiary		0		0		20.4
Gain on foreign currency remeasurement		0		0		(5.5)
Equity in net earnings of PersolKelly Pte. Ltd.		0		0		(0.8)
Other, net		(7.6)		1.8		3.3
Changes in operating assets and liabilities, net of acquisitions		(77.2)		(2)		(141)
Net cash from (used in) operating activities		26.9		76.7		(76.3)
Cash flows from investing activities:
Capital expenditures		(11.1)		(15.3)		(12)
Proceeds from sale of EMEA staffing operations, net of cash disposed		77.1		0		0
Proceeds from sale of assets		4.3		0		10.1
Acquisition of companies, net of cash received		(431.9)		0		(143.1)
Cash disposed from sale of Russia, net of proceeds		0		0		(6)
Proceeds from sale of Persol Holdings investment		0		0		196.9
Proceeds from sale of equity method investment		0		0		119.5
Other investing activities		0		1.2		2.1
Net cash (used in) from investing activities		(361.6)		(14.1)		167.5
Cash flows from financing activities:
Net change in short-term borrowings		0		(0.7)		0.8
Proceeds from long-term debt		1,340.2		0		0
Payments on long-term debt		(1,100.8)		0		0
Financing lease payments		0		(1.2)		(1.4)
Dividend payments		(10.9)		(11)		(10.6)
Payments of tax withholding for stock awards		(2.5)		(1.8)		(0.9)
Contingent consideration payments		0		(2.5)		(3.3)
Other financing activities		(1.2)		(0.2)		(0.2)
Net cash from (used in) financing activities		214.8		(59.6)		(50.6)
Effect of exchange rates on cash, cash equivalents and restricted cash		(2.1)		2.2		2.3
Net change in cash, cash equivalents and restricted cash		(122)		5.2		42.9
Cash, cash equivalents and restricted cash at beginning of year		167.6	[1]	162.4	[1]	119.5
Cash, cash equivalents and restricted cash at end of year	[1]	45.6		167.6		162.4
Cash and equivalents		39		125.8		153.7
Cash included in assets held for sale		0		33.5		0
Restricted cash included in prepaid expenses and other current assets		0.2		0.3		0.1
Restricted cash included in other assets		6.4		8		8.6
Common Stock
Cash flows from financing activities:
Buyback of common shares		0		0		(27.2)
Treasury Stock
Cash flows from financing activities:
Buyback of common shares		$ (10)		$ (42.2)		$ (7.8)
[1] (1) The following table provides a reconciliation of cash, cash equivalents and restricted cash to the amounts reported in our consolidated balance sheet:

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 29, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Nature of Operations Kelly Services, Inc. is a specialty talent and workforce solutions provider operating throughout the world. Fiscal Year The Company’s fiscal year ends on the Sunday nearest to December 31. The three most recent years ended on December 29, 2024 (2024), December 31, 2023 (2023) and January 1, 2023 (2022), all of which contained 52 weeks. Period costs included in selling, general and administrative ("SG&A") expenses are recorded on a calendar-year basis. The Company’s equity method investment in PersolKelly Pte. Ltd. was accounted for on a one-quarter lag prior to the sale of the majority of the investment in the first quarter of 2022 (see Investment in PersolKelly Pte. Ltd. footnote). Any material transactions in the intervening period were disclosed or accounted for in the current reporting period. Principles of Consolidation The consolidated financial statements include the accounts and operations of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated. Certain prior period amounts have been reclassified to conform to the current presentation. Specifically, as discussed in the Segment Disclosures footnote, the Company has made a change to its reportable segments during the first quarter of 2024. We have also reclassified the presentation of our retirement plan assets, which represents our investment in life insurance contracts, and intangibles, net from the other assets line item to separate line items within our consolidated balance sheet. Investment in Persol Holdings The Company’s previous investment in Persol Holdings, as further described in the Investment in Persol Holdings footnote, was carried at fair value with the changes in fair value recognized in net earnings. The fair value of the investment was based on the quoted market price until the sale of the investment in the first quarter of 2022. Investment in PersolKelly Pte. Ltd. The Company had a 49% ownership interest in its equity affiliate, PersolKelly Pte. Ltd., which was accounted for under the equity method. The operating results of the equity affiliate were recorded on a one-quarter lag and included in equity in net earnings of affiliate in the consolidated statements of earnings, until the Company sold the majority of the investment in the first quarter of 2022 (see Investment in PersolKelly Pte. Ltd. footnote). The remaining investment is accounted for as an equity investment without a readily determinable fair value (see Fair Value Measurements footnote). Foreign Currency Translation All of the Company’s international subsidiaries use their local currency as their functional currency, which is the currency in which they transact the majority of their activities. Revenue and expense accounts of foreign subsidiaries are translated to U.S. dollars at average exchange rates, while assets and liabilities are translated to U.S. dollars at year-end exchange rates. Resulting translation adjustments, net of tax, where applicable, are reported as accumulated foreign currency translation adjustments in stockholders’ equity and are recorded as a component of accumulated other comprehensive income (loss). Foreign Currency Forward Contracts The Company is exposed to foreign currency fluctuations and enters into foreign currency forward contracts to manage foreign currency risk. Forward contracts may be designated as a fair value hedge, while other forward contracts are not designated as hedging instruments. Both are used to reduce the exposure to variability in certain expected future cash flows. The Company records designated and non-designated derivatives at mark-to-market with gains and losses recognized in earnings according to their designation on the consolidated statements of earnings. See the Fair Value Measurements footnote for further detail on specific forward contracts including each respective line item in which gains and losses are recorded. We are permitted to net the fair values of derivative assets and liabilities for financial reporting purposes, if such assets and liabilities are with the same counterparty and subject to a master netting arrangement. Since these conditions have been met, we elected to employ net presentation of derivative assets and liabilities. Interest Rate Swap Contract The Company is exposed to interest rate fluctuation and enters into interest rate swap contracts that are not designated as hedging instruments to manage fluctuations on our securitization facility due to Secured Overnight Financing Rate ("SOFR") variances (see Fair Value Measurements footnote). The Company records these non-designated derivatives at mark-to-market with gains and losses recognized in other income (expense), net on the consolidated statements of earnings. We are permitted to net the fair values of derivative assets and liabilities for financial reporting purposes, if such assets and liabilities are with the same counterparty and subject to a master netting arrangement. Since these conditions have been met, we elected to employ net presentation of derivative assets and liabilities. Revenue Recognition Revenues are recognized when control of the promised services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those services. Our revenues are recorded net of any sales, value added, or similar taxes collected from our customers. We generate revenue from: the hourly sales of services by our temporary employees to customers ("staffing services" revenue), the recruiting of permanent employees for our customers ("permanent placement" revenue), and through our talent fulfillment and outcome-based activities ("talent solutions" and "outcome-based services" revenue). We record revenues from sales of services and the related direct costs in accordance with the accounting guidance on reporting revenue gross as a principal versus net as an agent. When Kelly is the principal, we demonstrate control over the service by being primarily responsible to our customers for fulfilling the contractual promise to provide the service. When Kelly does not demonstrate control over the service, which may be evident through the arrangement of other contingent labor suppliers and/or service providers to perform services for the customer or by Kelly not holding primary responsibility for the fulfillment of the contractual promise to provide services to the customer, the amounts billed to our customers are net of the amounts paid to the secondary suppliers/service providers and the net amount is recorded as revenues. Staffing Services Revenue Staffing services contracts are generally negotiated and invoiced on a per-hour or per-unit basis as the temporary staffing services are transferred to the customer. Revenue from the majority of our staffing services continues to be recognized over time as the customer simultaneously receives and consumes the services we provide. We have applied the practical expedient to recognize revenue for these services over the term of the agreement in proportion to the amount we have the right to invoice the customer. Permanent Placement Revenue Permanent placement revenue is recorded at the point in time the permanent placement candidate begins full-time employment. On the candidate start date, the customer accepts the candidate and can direct the use of the candidate as well as obtains the significant risk and rewards of the candidate. We consider this the point the control transfers to the customer. Outcome-Based Services Revenue Billings are generally negotiated and invoiced on a measure of time (hours, weeks, months) or per-unit basis for our services performed. We continue to recognize revenue from the majority of our outcome-based services over time as the customer simultaneously receives and consumes the services we provide. For the majority of our outcome-based services, we have applied the practical expedient to recognize revenue for these services over the term of the agreement in proportion to the amount we have the right to invoice the customer. Talent Solutions Revenue Talent Solutions services include: overall program management of our client’s contingent workforce, external vendors and/or independent contractors, end-to-end talent acquisition, and payroll outsourcing. Billings are generally negotiated and invoiced as a fee-based commission contingent on the amount of services managed through the program, a monthly management fee, measure of time (hours), or a per-unit basis for our services performed. We continue to recognize revenue for talent solution services over time as the customer simultaneously receives and consumes the services we provide. We have applied the practical expedient to recognize revenue for these services over the term of the agreement in proportion to the amount we have the right to invoice the customer. Variable Consideration Certain customers may receive cash-based incentives or credits, which are accounted for as a form of variable consideration. We estimate these amounts based on the expected or likely amount to be provided to customers and reduce revenues recognized to the extent that it is probable that a significant reversal of such adjustment will not occur. Provisions for sales allowances (billing adjustments related to errors, service issues and compromises on billing disputes), based on historical experience, are recognized at the time the related sale is recognized as a reduction in revenue from services. Payment Terms Customer payments are typically due within 60 days of invoicing, but may be shorter or longer depending on contract terms. Management does not assess whether a contract has a significant financing component if the expectation at contract inception is that the period between payment by the customer and the transfer of the services to the customer will be less than one year. We do not have any significant financing components or extended payment terms. Deferred Revenue Items which are billed to the customer at a point in time, rather than billed over time as the services are delivered to the customer, are assessed for potential revenue deferral. At this time, the balance of the contract liability as well as the amount of revenue recognized in the reporting period that was included in the deferred revenue balance at the beginning of the period is not material. Deferred Costs Occasionally, fulfillment costs are incurred after obtaining a contract in order to generate a resource that will be used to provide our services. These costs are considered incremental and recoverable costs to fulfill our contract with the customer. These costs to fulfill a contract are deferred and then amortized on a straight-line basis over a period of benefit that we have determined to be the average length of assignment of the employees. We determined the period of benefit by taking into consideration our customer contracts, attrition rates and other relevant factors. Amortization expense is included in SG&A expenses in the consolidated statements of earnings. Unsatisfied Performance Obligations In accordance with the applicable guidance, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed. Allowance for Credit Losses - Trade Accounts Receivable The Company records an allowance for uncollectible accounts receivable, billed and unbilled, based on historical loss experience, customer payment patterns, current economic trends, and reasonable and supportable forecasts, as applicable. The reserve for sales allowances is also included in the allowance for uncollectible accounts receivable. The Company estimates the current expected credit losses by applying internally developed loss rates to all outstanding receivable balances by aging category. Accounts receivable are written-off against the allowance when they are deemed uncollectible. The Company reviews the adequacy of the allowance for uncollectible accounts receivable on a quarterly basis and, if necessary, increases or decreases the balance by recording a charge or credit to SG&A expenses for the portion of the adjustment relating to uncollectible accounts receivable, and a charge or credit to revenue from services for the portion of the adjustment relating to sales allowances. We are exposed to credit losses primarily through our sales of workforce solution services to customers. We establish an allowance for estimated credit losses in the current period resulting from the failure of our customers to make required payments on their trade accounts receivable in future periods. We pool such assets by geography and other similar risk characteristics, such as accounts in collection, and apply an aging method to estimate future credit losses utilizing inputs such as historical write-off experience, customer payment patterns, current collection data, and reasonable and supportable forecasts, as applicable. Credit risk with respect to accounts receivable is limited due to short payment terms. The Company also performs ongoing credit evaluations using applicable credit ratings of its customers to help analyze credit risk. We monitor ongoing credit exposure thr ough frequent review of past due accounts (based on the payment terms of the contract) and follow-up with customers, as appropriate. We may employ collection agencies and legal counsel to pursue recovery of defaulted receivables. Allowance for Credit Losses - Other Financial Assets The Company measures expected credit losses on qualified financial assets that do not result from revenue transactions using a probability of default method by type of financing receivable. The estimate of expected credit losses considers credit ratings, financial data, historical write-off experience, current conditions, and reasonable and supportable forecasts, as applicable, to estimate the risk of loss. Cost of Services Cost of services are those costs directly associated with the earning of revenue. The primary examples of these types of costs are temporary employee wages, along with other employee related costs, including associated payroll taxes, temporary employee benefits, such as service bonus and holiday pay and health insurance, and workers’ compensation costs. These costs differ fundamentally from SG&A expenses in that they arise specifically from the action of providing our services to customers whereas SG&A costs are incurred regardless of whether or not we place temporary employees with our customers. Advertising Expenses Advertising expenses, which are expensed as incurred and are included in SG&A expenses, were $9.6 million in 2024, $7.8 million in 2023 and $6.4 million in 2022. Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Estimates are used for, but not limited to, the accounting for the allowance for uncollectible accounts receivable and credit losses, workers’ compensation, goodwill and long-lived asset impairment, valuation of acquired intangibles, litigation costs and income taxes. Actual results could differ materially from those estimates. Cash and Equivalents Cash and equivalents are stated at fair value. The Company considers securities with original maturities of three months or less to be cash and equivalents. Property and Equipment Property and equipment are stated at cost and are depreciated on a straight-line basis over their estimated useful lives. Cost and estimated useful lives of property and equipment by function are as follows (in millions of dollars): Category 2024 2023 Useful Life Land $ — $ — — Work in process 2.3 6.7 — Buildings and improvements 0.4 0.4 30 years Computer hardware and software 119.9 123.1 3 to 12 years Equipment, furniture and fixtures 10.9 22.6 5 years Leasehold improvements 6.5 13.1 HQ: 15 years Branches: Lesser of the lease or 5 years Total property and equipment $ 140.0 $ 165.9 The property and equipment at cost for 2023 in the table above includes $27.8 million of assets held for sale (see Acquisitions and Dispositions footnote). The Company capitalizes external costs and internal payroll costs directly incurred in the development of software for internal use as required by the Internal-Use Software Subtopic of the Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC"). Work in process represents capitalized costs for internal-use software not yet in service. Depreciation expense was $12.5 million for 2024, $12.4 million for 2023 and $13.6 million for 2022. Cloud Computing Arrangements The Company has cloud computing arrangements that are comprised of internal-use software platforms that are accounted for as service contracts. The Company does not have the ability to take possession of the software without significant penalty nor can the Company run the software on its own hardware or contract with another party unrelated to the vendor to host the software. Implementation costs associated with these cloud computing arrangements are capitalized when incurred during the application development phase. Amortization is calculated on a straight-line basis and is a component of SG&A expenses in our consolidated statements of earnings. Amortization expense was $11.6 million for 2024, $6.9 million for 2023, and $4.2 million for 2022. The related accumulated amortization totaled $23.5 million in 2024 and $14.2 million in 2023, of which $2.3 million was held for sale. Capitalized amounts related to such arrangements are recorded within prepaid and other current assets and non-current other assets in the consolidated balance sheet. The Company had $4.5 million as of year-end 2024 and $4.9 million, of which $0.1 million was held for sale, as of year-end 2023 recorded in prepaid expenses and other current assets in the consolidated balance sheet. The Company had $41.4 million as of year-end 2024 and $27.3 million, of which $3.4 million was held for sale, as of year-end 2023 recorded in non-current other assets in the consolidated balance sheet related to capitalized cloud computing arrangements (see Other Assets). Leases Right-of-use ("ROU") assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Since most of the Company’s leases do not have an implicit borrowing rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. Our leases may include options allowing us in our sole discretion to extend or terminate the lease, and when it is reasonably certain that we will exercise those options, we will include those periods in our lease term. Variable costs, such as payments for insurance and tax payments, are expensed when the obligation for those payments is incurred. Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the acquisition date fair value of net assets acquired. Purchased intangible assets are primarily comprised of acquired trade names and customer relationships that are recorded at fair value at the date of acquisition. The fair value of trade name intangibles is determined using the relief-from-royalty method, which relies on the use of estimates and assumptions about expected future revenue growth rates, royalty rates and discount rates. The fair value of customer relationship intangibles is determined using the multi-period excess earnings method, which relies on the use of estimates and assumptions about expected future revenue growth rates, customer attrition rates, profit margins and discount rates. Purchased intangible assets with definite lives are amortized over their respective useful lives (from 5 to 15 years) on a straight-line basis. Impairment of Long-Lived Assets, Intangible Assets, Goodwill, Equity Method Investments and Equity Securities The Company evaluates long-lived assets and intangible assets with definite lives for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When estimated undiscounted future cash flows will not be sufficient to recover the carrying amount of the asset group, in which the long-lived asset being tested for impairment resides, the asset is written down to its estimated fair value. Assets to be disposed of by sale, if any, are reported at the lower of the carrying amount or estimated fair value less cost to sell. We test goodwill for impairment annually and whenever events or circumstances make it more likely than not that an impairment may have occurred. Generally accepted accounting principles require that goodwill be tested for impairment at a reporting unit level. For segments with a goodwill balance, we have determined that our reporting units are the same as our operating and reportable segments based on our organizational structure or one level below our operating segments (the component level). We may first use a qualitative assessment ("step zero") for the annual impairment test if we have determined that it is more likely than not that the fair value for one or more reporting units is greater than their carrying value. The step zero analysis includes making judgments and assessments to determine whether any events or circumstances have occurred that makes it more likely than not that the fair value of a reporting unit is less than its carrying amount. In conducting the qualitative assessment, we assess the totality of relevant events and circumstances that affect the fair value or carrying value of the reporting unit. Such events and circumstances may include macroeconomic conditions, industry and market conditions, cost factors, overall financial performance, entity-specific events and events affecting a reporting unit. If we elect to forgo the qualitative assessment for a reporting unit, goodwill is tested for impairment by comparing the estimated fair value of a reporting unit to its carrying value ("step one"). If the estimated fair value of a reporting unit exceeds the carrying value of the net assets assigned to a reporting unit, goodwill is not considered impaired and no further testing is required. If the carrying value of the net assets assigned to a reporting unit exceeds the estimated fair value of a reporting unit, goodwill is deemed impaired and is written down to the extent of the difference. For the step one quantitative test, we determine the fair value of our reporting units using the income approach. Under the income approach, estimated fair value is determined based on estimated future cash flows discounted by an estimated market participant weighted-average cost of capital, which reflects the overall level of inherent risk of the reporting unit being measured. Estimated future cash flows are based on our internal projection model and reflects management’s outlook for the reporting unit. Assumptions and estimates about future cash flows and discount rates are complex and often subjective. They can be affected by a variety of factors, including external factors such as industry and economic trends, and internal factors such as changes in our business strategy and our internal forecasts. Our analysis used the following significant assumptions: expected future revenue growth rates, profit margins and discount rates. Prior to the sale of the majority of our investment in our equity affiliate, we evaluated our equity method investment on a quarterly basis or whenever events or circumstances indicated the carrying amount may be other-than-temporarily impaired. If we had concluded that there was an other-than-temporary impairment of our equity method investment, we would have adjusted our carrying amount of our investment to the adjusted fair value. We evaluate our equity securities measured under the measurement alternative for indicators of impairment on a quarterly basis and whenever observable price changes occur. The measurement alternative represents cost, less impairment, plus or minus observable price changes. Quarterly, we also confirm the securities still qualify to be measured in accordance with the measurement alternative. The value of the securities will be adjusted for any increases or decreases as a result of an observable price change. Accounts Payable Included in accounts payable balances are book overdrafts, which are outstanding checks in excess of funds on deposit. Such amounts totaled $5.1 million and $1.2 million at year-end 2024 and 2023, respectively. Accrued Payroll and Related Taxes Included in current accrued payroll and related taxes are book overdrafts, which are outstanding checks in excess of funds on deposit. Such amounts totaled $11.4 million and $9.6 million at year-end 2024 and 2023, respectively. Payroll taxes for temporary employees are recognized proportionately to direct wages for interim periods based on expected full-year amounts. Income Taxes The Company accounts for income taxes using the liability method. Under this method, deferred tax assets and liabilities are recognized for the expected tax consequences of temporary differences between the tax bases of assets and liabilities and their reported amounts. Valuation allowances are provided against deferred tax assets when it is more likely than not that some portion or all of the deferred tax asset will not be realized. The U.S. work opportunity credit is allowed for wages earned by employees in certain targeted groups. The actual amount of creditable wages in a particular period is estimated, since the credit is only available once an employee reaches a minimum employment period and the employee’s inclusion in a targeted group is certified by the applicable state. As these events often occur after the period the wages are earned, judgment is required in determining the amount of work opportunity credits accrued for in each period. We evaluate the accrual regularly throughout the year and make adjustments as needed. Uncertain tax positions that are taken or expected to be taken in a tax return are recognized in the financial statements when it is more likely than not (i.e., a likelihood of more than fifty percent) that the position would be sustained upon examination by tax authorities that have full knowledge of all relevant information. A recognized tax position is then measured at the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Interest and penalties related to income taxes are classified as income tax expense. U.S. taxes on global intangible low-taxed income ("GILTI") are accounted for as incurred. Stock-Based Compensation The Company may grant restricted stock awards and units (collectively, “restricted stock”) and performance awards of the Company's Class A stock to key employees. The Company utilizes the market price on the date of grant as the fair value for restricted stock and the market price on the date of grant less the present value of the expected dividends not received during the vesting period for performance awards. The value of awards is recognized as expense, net of forfeitures as they occur, over the requisite service periods in SG&A expenses in the Company’s consolidated statements of earnings. Earnings Per Share Restricted stock that entitle their holders to receive nonforfeitable dividends before vesting are considered participating securities and, therefore, are included in the calculation of earnings per share using the two-class method. The two-class method is an earnings allocation formula that determines earnings per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Under this method, earnings from continuing operations (or net earnings) is reduced by the amount of dividends declared, and the remaining undistributed earnings is allocated to common stock and participating securities based on the proportion of each class’s weighted average shares outstanding to the total weighted average shares outstanding. The calculation of diluted earnings per share includes the effect of potential common shares outstanding in the average weighted shares outstanding. Workers’ Compensation In the U.S., the Company has a combination of insurance and self-insurance contracts under which we effectively bear the first $1.0 million of risk per single accident. The Company establishes accruals for workers’ compensation claims utilizing actuarial methods to estimate the undiscounted future cash payments that will be made to satisfy the claims, including an allowance for incurred-but-not-reported claims. The Company retains an independent consulting actuary to establish loss development factors and loss rates, based on historical claims experience as well as industry experience, and applies those factors to current claims information to derive an estimate of the ultimate claims liability. In preparing the estimates, the consulting actuary considers a number of assumptions and multiple generally accepted actuarial methods in the course of preparing the loss forecast for claims. When claims exceed the applicable loss limit or self-insured retention and realization of recovery of the claim from existing insurance policies is deemed probable, the Company records a receivable from the insurance company for the excess amount. The receivable is included in prepaid expenses and other current assets and other assets in the consolidated balance sheet at year end. The Company evaluates the accrual quarterly throughout the year and makes adjustments as needed, and the ultimate cost of these claims may be greater than or less than the established accrual.

Revenue

Revenue	12 Months Ended
	Dec. 29, 2024
Revenue from Contract with Customer [Abstract]
Revenue	2. Revenue Revenue Disaggregated by Service Type Kelly has four operating segments: Professional & Industrial ("P&I"), Science, Engineering & Technology ("SET"), Education, and Outsourcing & Consulting Group ("Outsourcing & Consulting," "OCG"). Prior to 2024, the Company also had an International operating segment (see Segment Disclosures footnote). Following the sale of the Company's EMEA staffing operations in January 2024 (see Acquisitions and Dispositions footnote), the Mexico operations, which were previously in our International segment, are now included in our P&I segment. The 2023 and 2022 P&I segment information has been recast to conform to the new structure. Other than OCG, each segment delivers talent through staffing services, permanent placement or outcome-based services. Our OCG segment delivers talent solutions including managed service provider ("MSP"), payroll process outsourcing ("PPO"), recruitment process outsourcing ("RPO"), and talent advisory services. Our SET segment also offers talent solutions resulting from the acquisition of Motion Recruitment Partners, LLC, which is included in the SET segment (see Acquisitions and Dispositions footnote). The following table presents our segment revenues disaggregated by service type (in millions of dollars): December Year to Date 2024 2023 2022 Professional & Industrial Staffing services $ 956.9 $ 1,014.2 $ 1,229.5 Permanent placement 9.7 14.0 30.3 Outcome-based services 504.1 511.3 450.1 Total Professional & Industrial 1,470.7 1,539.5 1,709.9 Science, Engineering & Technology Staffing services 945.3 792.7 869.0 Permanent placement 29.5 17.8 29.7 Outcome-based services 421.5 380.3 366.7 Talent solutions 26.5 — — Total Science, Engineering & Technology 1,422.8 1,190.8 1,265.4 Education Staffing services 966.0 834.9 627.8 Permanent placement 6.3 7.0 8.4 Total Education 972.3 841.9 636.2 Outsourcing & Consulting Talent solutions 468.3 454.7 468.0 Total Outsourcing & Consulting 468.3 454.7 468.0 International Staffing services — 790.0 851.4 Permanent placement — 20.7 21.2 Talent solutions — 1.4 14.4 Total International — 812.1 887.0 Total Intersegment (2.3) (3.3) (1.1) Total Revenue from Services $ 4,331.8 $ 4,835.7 $ 4,965.4 Revenue Disaggregated by Geography Our operations are subject to different economic and regulatory environments depending on geographic location. Our P&I and Education segments operate in the Americas region, our SET segment operates in the Americas and Europe regions, and our OCG segment operates in the Americas, Europe and Asia-Pacific regions. In 2023 and 2022, our International segment included our staffing operations in Europe as well as Mexico, which is included in the Americas region. Our Russian operations were sold in the third quarter of 2022 (see Acquisitions and Dispositions footnote). The below table presents our revenues disaggregated by geography (in millions of dollars): December Year to Date 2024 2023 2022 Americas United States $ 3,876.9 $ 3,555.8 $ 3,671.5 Canada 188.6 189.8 168.2 Puerto Rico 108.0 107.0 112.4 Mexico 60.7 75.7 46.5 Total Americas Region 4,234.2 3,928.3 3,998.6 Europe Switzerland 4.0 224.2 222.8 France 0.4 194.4 199.4 Portugal — 189.4 169.5 Italy — 63.9 69.3 Russia — — 63.4 Other 37.5 191.8 200.3 Total Europe Region 41.9 863.7 924.7 Total Asia-Pacific Region 55.7 43.7 42.1 Total Kelly Services, Inc. $ 4,331.8 $ 4,835.7 $ 4,965.4 The below table presents revenue from our SET, OCG and former International segment, which previously included our Mexico operations, disaggregated by geographic region (in millions of dollars): December Year to Date 2024 2023 2022 Science, Engineering & Technology Americas $ 1,412.1 $ 1,175.2 $ 1,250.3 Europe 10.7 15.6 15.1 Total Science, Engineering & Technology $ 1,422.8 $ 1,190.8 $ 1,265.4 Outsourcing & Consulting Americas $ 381.4 $ 375.0 $ 403.3 Europe 31.2 36.0 22.6 Asia-Pacific 55.7 43.7 42.1 Total Outsourcing & Consulting $ 468.3 $ 454.7 $ 468.0 International Europe $ — $ 812.1 $ 887.0 Total International $ — $ 812.1 $ 887.0 Deferred Costs Deferred fulfillment costs, which are included in prepaid expenses and other current assets in the consolidated balance sheet, were $1.8 million as of year-end 2024 and $3.4 million as of 2023. Amortization expense for the deferred costs was $6.7 million for 2024, $7.7 million for 2023 and $10.1 million for 2022. As of year-end 2024, there was no impairment loss in relation to the costs capitalized.

Credit Losses

Credit Losses	12 Months Ended
	Dec. 29, 2024
Credit Loss [Abstract]
Credit Losses	3. Credit Losses The rollforward of our allowance for credit losses related to trade accounts receivable, which is recorded in trade accounts receivable, less allowance in the consolidated balance sheet, is as follows (in millions of dollars): December Year to Date 2024 2023 2022 Allowance for credit losses: Beginning balance $ 8.0 $ 7.7 $ 9.4 Current period provision 0.6 2.1 1.3 Currency exchange effects (0.3) 0.3 (0.2) Disposition of EMEA staffing operations (2.4) — — Write-offs (1.0) (2.1) (2.8) Ending balance $ 4.9 $ 8.0 $ 7.7 Write-offs are presented net of recoveries, which were not material for December year-to-date 2024, 2023 and 2022. As of year-end 2024, the Company has a receivable of $16.4 million related to the sale of our EMEA staffing operations (see Acquisitions and Dispositions footnote). The Company has determined that no credit loss provision is required on this receivable as it is considered collectible. There were no long-term customer receivables in 2024, 2023 and 2022 . No allowances related to other receivables were material for December year-to-date 2024, 2023 and 2022 .

Acquisitions and Dispositions

Acquisitions and Dispositions	12 Months Ended
	Dec. 29, 2024
Business Combinations [Abstract]
Acquisitions and Dispositions	4. Acquisitions and Dispositions Acquisitions Children's Therapy Center On November 13, 2024, Kelly Services USA, LLC ("KSU"), a wholly owned subsidiary of the Company, acquired 100% of the issued and outstanding limited liability company interests of Children's Therapy Center ("CTC"). CTC specializes in occupational, physical, and speech therapy for children and will expand the Company's growth opportunities in therapeutic services. Under terms of the purchase agreement, the purchase price of $3.3 million was adjusted for cash held by CTC at the closing date and estimated working capital adjustments, resulting in the company paying cash of $3.1 million. Goodwill generated from the acquisition of $3.0 million was primarily attributable to expanding market potential and was assigned to the Education operating segment (see Goodwill and Intangible Assets footnote). CTC's results of operations are included in the Education segment. Pro forma results of operations for this acquisition have not been presented as the acquisition does not have a material impact to the consolidated statements of earnings. Motion Recruitment Partners On May 31, 2024, the Company indirectly acquired 100% of the equity interests in Motion Recruitment Partners, LLC ("MRP") by way of a merger with MRP Merger Sub, Inc. ("Merger Sub"), a newly-formed, wholly owned subsidiary of the Company, with and into MRP Topco ("Topco"), the indirect parent company of MRP and Littlejohn Fund V, L.P. ("Littlejohn"), with Topco surviving the merger (the "Merger"). MRP is a parent company to a group of leading global talent solutions providers and the acquisition is expected to strengthen the scale and capabilities of Kelly's solutions portfolio. Under terms of the merger agreement, the $425.0 million purchase price was adjusted for estimated cash held by MRP at the closing date and estimated working capital adjustments, resulting in the Company paying cash of $440.0 million. The acquisition was funded with cash on hand and available credit facilities (see Debt footnote). Total consideration included $3.4 million of contingent consideration related to an earnout payment with a maximum potential cash payment of $60.0 million in the event certain financial metrics are met per the terms of the agreement. The earnout payment is based upon a multiple of gross profit in excess of an agreed-upon amount during the earnout period, defined as the 12 months ending March 31, 2025, and any necessary payment is due to the seller in the second quarter of 2025. The initial fair value of the earnout was established using a Monte Carlo simulation model, reassessed quarterly, and was written down to zero in the fourth quarter of 2024 (see Fair Value Measurements footnote). In the fourth quarter of 2024, the Company paid a post-close net working capital adjustment of $1.4 million. The merger agreement contains representations and warranties and covenants customary for a transaction of this nature. The total consideration is as follows (in millions of dollars): Cash consideration paid $ 425.0 Estimated cash acquired 13.6 Estimated net working capital adjustment 1.4 Total cash consideration 440.0 Additional consideration payable 3.4 Net working capital adjustment 1.4 Total consideration $ 444.8 The purchase price allocation for this acquisition is preliminary and could change. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the date of the acquisition (in millions of dollars): Cash and equivalents $ 12.6 Trade accounts receivable 89.1 Prepaid expenses and other current assets 8.5 Net property and equipment 3.1 Operating lease right-of-use assets 11.9 Goodwill 222.9 Intangibles, net 145.9 Other assets, noncurrent 10.6 Accounts payable and accrued liabilities, current (12.1) Operating lease liabilities, current (4.0) Accrued payroll and related taxes, current (15.9) Income and other taxes, current (0.5) Operating lease liabilities, noncurrent (9.0) Other long-term liabilities (18.3) Total consideration, including working capital adjustments $ 444.8 The fair value of the acquired receivables represents the contractual value net of the allowance for potentially uncollectible accounts. Included in the assets purchased in the MRP acquisition was $145.9 million of intangible assets, made up of $88.1 million in customer relationships, $56.5 million associated with MRP's trade names, and $1.3 million for non-compete agreements. The customer relationships are amortized over 15 years with no residual value, the trade names are amortized over 10-15 years with no residual value, and the non-compete agreements are amortized over four years with no residual value. Goodwill generated from the acquisition was primarily attributable to expanding market potential and the expected revenue and operational synergies and was assigned to the SET operating segment (see Goodwill and Intangible Assets footnote). None of the goodwill generated from the acquisition is expected to be deductible for tax purposes. MRP's results of operations are included in the SET segment. For year-end 2024, our consolidated revenues and net earnings (loss) include $285.8 million and $4.2 million of earnings from MRP, respectively. Pro Forma Information The following unaudited pro forma information presents a summary of the operating results as if the MRP acquisition had been completed as of January 2, 2023 (in millions of dollars): 2024 2023 Pro forma revenues $ 4,552.2 $ 5,389.8 Pro forma net earnings (loss) $ (4.9) $ 30.8 The pro forma results for the periods above include adjustments to amortization expense for the intangible assets, reversal of MRP's interest expense on credit facilities that were settled upon completion of the acquisition, interest expense and associated amortization of debt issuance costs for financing the acquisition, reclassification of transaction expenses to the appropriate period, and applicable taxes. The unaudited pro forma information presented has been prepared for comparative purposes only and is not necessarily indicative of the results of operations as they would have been had the acquisition occurred on the assumed date, nor is it necessarily an indication of future operating results. Pediatric Therapeutic Services In the second quarter of 2022, KSU, a wholly owned subsidiary of the Company, acquired 100% of the membership interests of Pediatric Therapeutic Services ("PTS") for a purchase price of $82.1 million. PTS is a specialty firm that provides and manages various state and federally mandated in-school therapy services. This acquisition expanded Education's K-12 solution offering in the education staffing market and served as an entry point into the therapeutic services market. Under terms of the purchase agreement, the purchase price was adjusted for cash held by PTS at the closing date and estimated working capital adjustments resulting in the Company paying cash of $85.7 million. PTS's results of operations are included in the Education segment. RocketPower In the first quarter of 2022, the Company acquired Rocket Power Holdings LLC and Rocket Power Ops LLC (collectively, "RocketPower") and acquired 100% of the issued and outstanding membership interests of RocketPower for a purchase price of $59.3 million. RocketPower is a provider of RPO solutions to U.S. high-tech companies. This acquisition expanded OCG's RPO solution and delivery offering and enhanced the specialty RPO strategy and expertise within the high-tech industry. Under terms of the purchase agreement, the purchase price was adjusted for cash held by RocketPower at the closing date and estimated working capital adjustments resulting in the Company paying cash of $61.8 million. RocketPower's results of operations are included in the OCG segment. Goodwill generated from the acquisition was primarily attributable to expected synergies from combining operations and expanding market potential and was assigned to the OCG operating segment. In 2022, changes in market conditions triggered interim impairment tests for both long-lived assets and goodwill, resulting in the Company recording a goodwill impairment charge of $41.0 million (see Goodwill and Intangible Assets footnote). Dispositions Disposition of EMEA Staffing Operations On January 2, 2024, the Company completed the sale of its EMEA staffing operations ("disposal group"), which was included in the Company's International operating segment, to Gi Group Holdings S.P.A. ("Gi"). Upon closing, the Company received cash proceeds of $110.6 million, or $77.1 million net of cash disposed, which is included in investing activities in the consolidated statements of cash flows. The Company expects to receive additional net cash proceeds to reflect the cash-free, debt-free transaction basis, as well as working capital and other adjustments. The Company will not receive any proceeds from the contingent consideration opportunity associated with the transaction. In the first quarter of 2024, the Company recorded a euro-denominated receivable from Gi of $26.9 million representing the adjustments that were determinable and expected to be received. In the second quarter of 2024, the Company recorded negative working capital and other adjustments of $10.1 million, which reduced the net receivable from Gi to $16.8 million. As of year-end 2024, the net receivable is $16.4 million, with the change of $0.4 million from the second quarter reflecting foreign currency remeasurements. The Company is actively reconciling the receivable in accordance with the purchase agreement and expects it to be settled upon completion of this process. The receivable is included in prepaid expenses and other current assets in the consolidated balance sheet and included in the gain on the transaction. The total gain on the transaction at year-end 2024 is $1.6 million, which is recorded in the gain on sale of EMEA staffing operations in the consolidated statements of earnings. The disposal group did not meet the requirements to be classified as discontinued operations as the sale did not have a material effect on the Company's operations and did not represent a strategic shift in the Company's strategy. As of December 31, 2023, the disposal group was classified as held for sale and held at its carrying value. Our consolidated earnings from operations in 2023 included earnings of $4.3 million from the EMEA staffing operations. The major classes of divested assets and liabilities were as follows (in millions of dollars): Assets divested Cash and equivalents $ 33.5 Trade accounts receivable, net 202.8 Prepaid expenses and other current assets 29.0 Property and equipment, net 4.2 Operating lease right-of-use assets 14.2 Deferred taxes 4.1 Other assets 5.4 Assets divested 293.2 Liabilities divested Accounts payable and accrued liabilities (24.5) Operating lease liabilities, current (5.7) Accrued payroll and related taxes (91.6) Income and other taxes (32.9) Operating lease liabilities, noncurrent (8.9) Accrued retirement benefits (1.7) Other long-term liabilities (4.6) Liabilities divested (169.9) Disposal group, net $ 123.3 Disposition of Russia Operations On July 20, 2022, the Company completed the sale of its Russia operations, which was included in the Company's International operating segment. The Company received cash proceeds of $7.4 million, which was less than the cash disposed of in the sale, resulting in investing cash outflows of $6.0 million in the consolidated statements of cash flows. The transaction resulted in a loss on the sale of $18.7 million, which was recorded in loss on disposal in the consolidated statements of earnings. The Russia operations did not meet the requirements to be classified as discontinued operations as the sale did not have a material effect on the Company's operations and did not represent a strategic shift in the Company's strategy. Our consolidated revenue for the year ended 2022 included $63.4 million from the Russia operations and our consolidated earnings before taxes for the year ended 2022 included $1.4 million from the Russia operations.

Investment in Persol Holdings

Investment in Persol Holdings	12 Months Ended
	Dec. 29, 2024
Investment in Persol Holdings [Abstract]
Investment in Persol Holdings	5. Investment in Persol Holdings Prior to February 2022, the Company had a yen-denominated investment through the Company's subsidiary, Kelly Services Japan, Inc., in the common stock of Persol Holdings Co., Ltd. ("Persol Holdings"), the 100% owner of Persol Asia Pacific Pte. Ltd., the Company’s joint venture partner in PersolKelly Pte. Ltd. (the "JV"). In February 2022, the Company's board approved a series of transactions that ended the cross-shareholding agreement with Persol Holdings. On February 14, 2022, the Company repurchased 1,576,169 Class A and 1,475 Class B common shares held by Persol Holdings for $27.2 million. The purchase price was based on the average closing price of the last five business days prior to the transaction. The shares were subsequently retired and returned to an authorized, unissued status. In accordance with the Company's policy, the amount paid to repurchase the shares in excess of par value of $25.6 million was recorded to earnings invested in the business in the consolidated balance sheet at the time of the share retirement. On February 15, 2022, Kelly Services Japan, Inc. sold the investment in the common stock of Persol Holdings in an open-market transaction for proceeds of $196.9 million, net of transaction fees. The $67.2 million loss in the first quarter of 2022 recorded in loss on investment in Persol Holdings in the consolidated statements of earnings included $52.4 million for losses related to changes in fair value up to the date of the transaction and $14.8 million for the discount from the market price on the date of the sale and transaction costs. Subsequent to the transaction discussed above, the Company commenced the dissolution process of its Kelly Services Japan, Inc. subsidiary, which was considered substantially liquidated as of first quarter-end 2022. As a result, the Company recognized a $20.4 million cumulative translation adjustment loss in the first quarter of 2022, which was recorded in loss on currency translation from liquidation of subsidiary in the consolidated statements of earnings. The Company also recognized a $5.5 million foreign exchange gain related to U.S.-denominated cash equivalents held by Kelly Services Japan, Inc. following the sale of the Persol Holdings shares and prior to a dividend payment to the Company in the first quarter of 2022. The foreign exchange gain was recorded in other income (expense), net in the consolidated statements of earnings. The dissolution of the Kelly Services Japan, Inc. subsidiary was completed in the fourth quarter of 2022.

Investment in PersolKelly Pte.

Investment in PersolKelly Pte. Ltd.	12 Months Ended
	Dec. 29, 2024
Equity Method Investments and Joint Ventures [Abstract]
Investment in PersolKelly Pte. Ltd.	6. Investment in PersolKelly Pte. Ltd. Prior to February 2022, the Company had a 49% ownership interest in the JV (see Investment in Persol Holdings footnote above), a staffing services business operating in ten geographies in the Asia-Pacific region. On February 14, 2022, the Company entered into an agreement to sell 95% of the Company's shares in the JV to Persol Asia Pacific Pte. Ltd. On March 1, 2022, the Company received cash proceeds of $119.5 million. The carrying value of the shares sold was $117.6 million. In addition, the Company had $1.9 million of accumulated other comprehensive income representing the Company's share of the JV's other comprehensive income over time related to the shares sold that was realized upon the sale, offsetting the $1.9 million gain that resulted from the proceeds in excess of the carrying value. The operating results of the Company’s interest in the JV were accounted for on a one-quarter lag under the equity method and were reported in equity in net earnings of affiliate in the consolidated statements of earnings through the date of the sale. Such amounts were earnings of $0.8 million in the first quarter of 2022, representing the results through the date of the sale.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 29, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	7. Fair Value Measurements Trade accounts receivable, short-term borrowings, accounts payable, accrued liabilities and accrued payroll and related taxes approximate their fair values due to the short-term maturities of these assets and liabilities. Our long-term debt is related to revolving credit agreements and their carrying values approximate fair value as the interest rates are variable and reflect current market rates. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following tables present assets and liabilities measured at fair value on a recurring basis as of year-end 2024 and 2023 in the consolidated balance sheet by fair value hierarchy level, as described below. Level 1 measurements consist of unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 measurements include quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the asset or liability. Level 3 measurements include significant unobservable inputs. There were no transfers between Level 1, Level 2 and Level 3 assets or liabilities in 2024 or 2023. As of Year-End 2024 Description Total Level 1 Level 2 Level 3 (In millions of dollars) Money market funds $ 6.4 $ 6.4 $ — $ — Total assets at fair value $ 6.4 $ 6.4 $ — $ — Interest rate swaps $ (0.4) $ — $ (0.4) $ — EMEA staffing indemnification (2.0) — — (2.0) Brazil indemnification (1.7) — — (1.7) Total liabilities at fair value $ (4.1) $ — $ (0.4) $ (3.7) As of Year-End 2023 Description Total Level 1 Level 2 Level 3 (In millions of dollars) Money market funds $ 42.5 $ 42.5 $ — $ — Total assets at fair value $ 42.5 $ 42.5 $ — $ — Brazil indemnification $ (3.0) $ — $ — $ (3.0) Foreign currency forward contract, net (3.6) — (3.6) — Total liabilities at fair value $ (6.6) $ — $ (3.6) $ (3.0) Money market funds Money market funds represent investments in money market funds that hold government securities, of which $6.4 million as of year-end 2024 and $8.0 million as of year-end 2023 are restricted as to use and are included in other assets in the consolidated balance sheet. The money market funds that are restricted as to use account for the majority of our restricted cash balance and represents cash balances that are required to be maintained to fund disability claims in California. The remaining money market funds as of year-end 2023 are included in cash and equivalents in the consolidated balance sheet. The valuations of money market funds are based on quoted market prices of those accounts as of the respective period end. Forward contracts On February 8, 2024, the Company entered into a foreign currency forward contract with a notional amount of €17.0 million to manage the foreign currency risk associated with expected additional proceeds related to the sale of our EMEA staffing operations (see Acquisitions and Dispositions footnote). The expected proceeds are recorded as a euro-denominated receivable which is remeasured quarterly. The forward contract was designated as a fair value hedge, with the mark-to-market changes of the forward contract offsetting the mark-to-market changes of the receivable in the gain on sale of EMEA staffing operations in the consolidated statements of earnings. The contract was valued using observable inputs, such as foreign currency exchange rates, and was considered a level 2 liability. In the fourth quarter of 2024, the Company settled the contract with a $0.4 million cash payment and recognized a corresponding loss of $0.4 million on the contract. As of year-end 2024, there is no asset or liability related to the forward contract. On November 2, 2023, the Company entered into a foreign currency forward contract with a notional amount of €90.0 million to manage the foreign currency risk associated with the sale of our EMEA staffing operations, which was completed on January 2, 2024. This contract was not designated as a hedging instrument; therefore, it was marked-to-market and the changes in fair value were recognized in earnings. The Company's foreign currency forward contract was valued using observable inputs, such as foreign currency exchange rates, and was considered a level 2 liability. The Company recorded an unrealized loss of $3.6 million for the year ended 2023 and had a net liability associated with the forward contract of $3.6 million as of year-end 2023. The Company settled the forward contract on January 5, 2024 for $2.4 million of cash. Accordingly, the Company recognized a gain of $1.2 million in the first quarter of 2024 in other income (expense), net on the consolidated statements of earnings, which partially offsets the $3.6 million loss recognized in 2023, for a total loss of $2.4 million on the contract. Interest rate swaps On July 17, 2024, the Company entered into two interest rate swaps with a notional value of $50.0 million each to manage fluctuations on our securitization facility due to SOFR variances (see Debt footnote). These contracts were not designated as hedging instruments; therefore, the mark-to-market fair value changes and the cash settlements on the swaps are recognized in earnings. The Company's interest rate swaps were valued with assistance from a third party based on pricing models using observable inputs, such as SOFR forward rates, and are considered level 2 liabilities, which will be remeasured quarterly. As of year-end 2024, the Company recorded a liability totaling $0.4 million related to the mark-to-market fair value change of the interest rate swaps in accounts payable and accrued liabilities in the consolidated balance sheet. In 2024, the Company recorded a total loss of $0.2 million. This loss includes $0.4 million related to mark-to-market changes in fair value, which was partially offset by the impact of cash settlements of $0.2 million, in other income (expense), net in the consolidated statements of earnings. Indemnification liabilities As of year-end 2024, the Company has an indemnification liability totaling $2.0 million related to the sale of the EMEA staffing operations in January 2024. The liability is included in other long-term liabilities in the consolidated balance sheet and the associated expense is included in the gain on sale of EMEA staffing operations in the consolidated statements of earnings. As part of the sale, the Company agreed to indemnify the buyer for losses and costs incurred in connection with certain events or occurrences for an indefinite term. The Company's maximum exposure under these indemnifications is not estimable at this time due to uncertainties to potential outcomes and the facts and circumstances involved in the agreement. Management believes the risk of material exposure is remote. The initial valuation of the indemnification liability was established using a discounted cash flow methodology based on probability weighted-average cash flows discounted by weighted-average cost of capital. The valuation, which represents the fair value, is considered a level 3 liability and is measured on a recurring basis. During 2024, the Company recognized a decrease of $0.1 million to the indemnification liability related to exchange rate fluctuations in other income (expense), net in the consolidated statements of earnings. As year-end 2024, the Company has an indemnification liability related to the 2020 sale of the Brazil operations totaling $1.7 million with $0.9 million in accounts payable and accrued liabilities and $0.8 million in other long-term liabilities, and $3.0 million as of year-end 2023 with $0.1 million in accounts payable and accrued liabilities and $2.9 million in other long-term liabilities on the consolidated balance sheet. As part of the sale, the Company agreed to indemnify the buyer for losses and costs incurred in connection with certain events or occurrences initiated within a six-year period after closing. The aggregate losses for which the Company will provide indemnification will not exceed $8.8 million. The valuation of the indemnification liability was established using a discounted cash flow methodology based on probability weighted-average cash flows discounted by weighted-average cost of capital. The valuation, which represents the fair value, is considered a level 3 liability, and is being measured on a recurring basis. In 2024, the Company recognized a decrease of $0.7 million to the indemnification liability related to exchange rate fluctuations and was also reduced by $0.7 million as a result of the fourth quarter reassessment of the liability, both of which are recorded in other income (expense), net in the consolidated statements of earnings. Earnout liabilities The Company recorded an initial earnout liability relating to the 2024 acquisition of MRP totaling $3.4 million in accounts payable and accrued liabilities in the consolidated balance sheet (see Acquisitions and Dispositions footnote). The valuation of the earnout liability was initially established using the Monte Carlo simulation model and represented the fair value and is considered a level 3 liability. The maximum total cash payment which may be due related to the earnout liability is $60.0 million. In the fourth quarter 2024, the liability was reassessed and the fair value was determined to be zero. As such, there is no liability recorded related to the earnout as of year-end 2024. The Company recorded an earnout liability relating to the 2020 acquisition of Greenwood/Asher, with a remaining liability of $3.3 million at year-end 2022. The initial valuation of the earnout liability was established using a Black Scholes model and represented the fair value and was considered a level 3 liability. During the first quarter of 2023, the Company paid the remaining earnout liability totaling $3.3 million, representing the year two portion of the earnout. In the consolidated statements of cash flows, $1.4 million of the payment was reflected as a financing activity representing the initial fair value of the earnout, with the remainder flowing through operating activities. There was no remaining earnout liability as of year-end 2023. During the first quarter of 2022, the Company paid the year one portion of the earnout totaling $2.3 million. In the consolidated statements of cash flows, $0.7 million is reflected as a financing activity representing the initial fair value of the earnout, with the remainder flowing through operating activities. Equity Investments Without Readily Determinable Fair Value In 2022, the Company invested in equity securities with an initial investment of $0.4 million which was included in other assets in the consolidated balance sheet. This investment is measured using the measurement alternative for equity investments without a readily determinable fair value. The measurement alternative represents cost, less impairment, plus or minus observable price changes. In the fourth quarter of 2024, the Company entered into a transaction to sell a portion of its shares with a carrying value of $0.1 million, representing total cost plus observable price changes to date. As a result of the sale, the Company recorded a gain of $0.6 million in other income (expense), net in the consolidated statements of earnings. Additionally, as a result of the sale, the value of the remaining investment was remeasured to $3.5 million based on observable prices changes and an unrealized gain of $3.2 million was recorded in other income (expense), net in the consolidated statements of earnings. The Company holds a 2.5% interest in PersolKelly Pte. Ltd. (see Investment in PersolKelly Pte. Ltd. footnote) which is measured using the measurement alternative for equity investments without a readily determinable fair value. The investment totaled $6.4 million as of year-end 2024 and 2023, representing total cost plus observable price changes to date. Assets Measured at Fair Value on a Nonrecurring Basis In addition to assets that are recorded at fair value on a recurring basis, annual and interim impairment tests may subject our reporting units with goodwill and long-lived assets to nonrecurring fair value measurement. We performed our annual impairment test for goodwill in the fourth quarter of each year and for long-lived assets whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Refer to the Goodwill and Intangible Assets footnote for additional details on impairment charges related to years-ended 2024 and 2022. There were no goodwill or intangible asset impairment charges recorded in 2023. The various inputs to the fair value models are considered level 3. Refer to the Significant Accounting Policies footnote for additional details on the valuation methodologies and inputs used to measure fair value.

Restructuring and Transformatio

Restructuring and Transformation Activities	12 Months Ended
	Dec. 29, 2024
Restructuring and Related Activities [Abstract]
Restructuring and Transformation Activities	8. Restructuring and Transformation Activities 2024 Actions Restructuring and transformation charges for the year-ended 2024 were $6.1 million as a continuation of the actions that were announced in the second quarter of 2023 as part of the comprehensive transformation initiative. The transformation activities consisted of $3.0 million of severance charges and $3.1 million of costs to execute the transformation. The severance and transformation costs are recorded in SG&A expenses in the consolidated statements of earnings. Additionally, in 2024, the Company recognized an impairment charge of $13.5 million primarily for certain ROU assets related to our leased headquarters facility reflecting adjustments as to how we are utilizing the building as a part of our ongoing transformation efforts. The impairment charges related to the ROU assets are recorded in the asset impairment charge in the consolidated statements of earnings. The restructuring and transformation costs included in SG&A are detailed below for December year-to-date 2024 (in millions of dollars): Severance Transformation Costs Total Professional & Industrial $ 0.3 $ — $ 0.3 Science, Engineering & Technology 0.3 — 0.3 Outsourcing & Consulting 0.4 — 0.4 Corporate 2.0 3.1 5.1 Total $ 3.0 $ 3.1 $ 6.1 2023 Actions In the first quarter of 2023, the Company undertook restructuring actions to further our cost management efforts in response to the demand levels and to reflect a repositioning of our P&I staffing business to better capitalize on opportunities in local markets. Restructuring costs incurred in the first quarter of 2023 related to these efforts totaled $5.7 million, which included $4.6 million of severance and $1.1 million of lease termination and other expenses and were recorded entirely in SG&A expenses in the consolidated statements of earnings. In the second quarter of 2023, the Company announced a comprehensive transformation initiative that included actions to further streamline the Company's operating model to enhance organizational efficiency and effectiveness. The total costs incurred related to these transformation activities In connection with the sale of our EMEA staffing operations in the first quarter of 2024 (see Acquisitions and Dispositions footnote), there was an additional amount of severance costs for $3.1 million incurred in the fourth quarter of 2023 that was related to the sale and recorded in SG&A expenses in the consolidated statements of earnings and included in the table below. The restructuring and transformation costs incurred in 2023 and included in SG&A are detailed below (in millions of dollars): Severance Costs Lease Termination Costs, Transformation and Other Total Professional & Industrial $ 6.0 $ 0.7 $ 6.7 Science, Engineering & Technology 1.3 0.3 1.6 Education 1.0 — 1.0 Outsourcing & Consulting 3.0 — 3.0 International 3.3 — 3.3 Corporate 4.7 18.3 23.0 Total $ 19.3 $ 19.3 $ 38.6 2022 Actions In the first quarter of 2022, the Company took restructuring actions designed to increase efficiency. Restructuring costs Severance Costs Lease Termination Costs Total Professional & Industrial $ 0.1 $ 0.2 $ 0.3 Education 0.4 — 0.4 Outsourcing & Consulting 0.2 — 0.2 Corporate 0.8 — 0.8 Total $ 1.5 $ 0.2 $ 1.7 Accrual Summary A summary of our global restructuring balance sheet accrual, included in accrued payroll and related taxes and accounts payable and accrued liabilities in the consolidated balance sheet, is detailed below (in millions of dollars): Balance as of year-end 2022 $ 0.3 Accruals 40.6 Reductions for cash payments (23.8) Accrual adjustments (2.0) Balance as of year-end 2023 15.1 Accruals 6.6 Reductions for cash payments (19.4) Disposition of EMEA staffing operations (1.5) Accrual adjustments (0.5) Balance as of year-end 2024 $ 0.3 The remaining balance of $0.3 million as of year-end 2024 primarily represents severance costs and the majority is expected to be paid by first quarter-end 2025. No material adjustments are expected to be recorded.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 29, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	9. Goodwill and Intangible Assets Goodwill The changes in the carrying amount of goodwill for the fiscal years 2024 and 2023 are included in the table below (in millions of dollars): Science, Engineering & Technology Education Total Balance as of year-end 2022 $ 111.3 $ 39.8 $ 151.1 Additions — — — Impairment adjustments — — — Balance as of year-end 2023 111.3 39.8 151.1 Additions 222.9 3.0 225.9 Impairment adjustments (72.8) — (72.8) Balance as of year-end 2024 $ 261.4 $ 42.8 $ 304.2 Our SET reportable segment includes goodwill acquired in the second quarter of 2021 and 2024, related to our Softworld and MRP reporting units, respectively. Our Education reportable segment includes goodwill acquired in the fourth quarter of 2020, second quarter of 2022 and fourth quarter of 2024, related to our Education and PTS reporting units, respectively. (See the Acquisitions and Dispositions footnote for more details regarding each acquisition.) The Company performs its annual goodwill impairment testing in the fourth quarter each year and regularly assesses whenever events or circumstances make it more likely than not that an impairment may have occurred. We also perform a qualitative review on a quarterly basis of our long-lived assets, comprised of net property and equipment and definite-lived intangible assets, to determine whether events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. 2024 Goodwill Impairment Assessment In the fourth quarter of 2024, we performed our annual goodwill impairment testing. For the PTS and Education reporting units, we performed step zero qualitative analyses and have concluded that there are no indications that the fair values of the PTS and Education reporting units are less than their respective carrying values and therefore no further testing was required. For the Softworld and MRP reporting units, our annual goodwill impairment testing included step one quantitative tests. As a result of the MRP quantitative assessment, we determined that the estimated fair value of the MRP reporting unit was more than its carrying value. The estimated fair value of the MRP reporting unit exceeded the carrying value by less than 10%. If current expectations of future revenue and profit margins are not met, or if market factors outside of our control change significantly, including discount rate, then the goodwill of the MRP reporting unit may be impaired in the future, resulting in goodwill impairment charges. As a result of the Softworld quantitative assessment, the Company determined that Softworld's estimated fair value of the reporting unit no longer exceeded the carrying value. Softworld's 2024 financial performance was lower than internal projections due to continued challenging market conditions. As a result, management’s expectation for near-term financial performance and projected long-term growth rates were revised accordingly. These changes in circumstances were also indicators that the respective long-lived assets may not be recoverable. Softworld has definite-lived intangible assets, consisting of trade names, customer relationships and non-compete agreements, which are amortized over their estimated useful lives. We performed a long-lived asset recoverability test for Softworld and determined that undiscounted future cash flows exceeded the carrying amount of the asset group and were recoverable. Based on the result of our annual goodwill impairment test, we recorded an impairment charge of $72.8 million, which was included in goodwill impairment charge in the consolidated statements of earnings for the year ended 2024, to write-off a portion of Softworld's goodwill balance. Included in the impairment charge was an $18.4 million tax benefit associated with the impairment. The remaining goodwill balance for the Softworld reporting unit was $38.5 million as of year-end 2024. If current expectations of future revenue and profit margins are not met, or if market factors outside of our control change significantly, including discount rate, then the goodwill of the Softworld reporting unit may be further impaired in the future, resulting in goodwill impairment charges. 2023 Goodwill Impairment Assessment In the fourth quarter of 2023, we performed our annual goodwill impairment testing, which included a step one quantitative test for the Softworld and PTS reporting units. As a result of the quantitative assessment, we determined that the estimated fair value of the Softworld and PTS reporting units was more than its carrying value. Additionally, we performed a step zero qualitative analysis for the Education reporting unit to determine whether a further quantitative analysis was necessary and concluded that a step one quantitative analysis was not necessary. As a result of the quantitative and qualitative assessments, the Company determined goodwill related to these reporting units was not impaired. As of year-end 2023, the estimated fair value of the Softworld reporting unit exceeded the carrying value by less than 10%. 2022 Goodwill Impairment RocketPower was acquired during the first quarter of 2022 was allocated to the OCG reportable segment and was deemed to be a separate reporting unit. During the second half of 2022, customers within the high-tech industry vertical, in which RocketPower specializes, reduced or eliminated their full-time hiring, reducing demand for RocketPower’s services, and on-going economic uncertainty had more broadly impacted the growth in demand for RPO in the near-term. These changes in market conditions therefore caused triggering events requiring interim impairment tests for both long-lived assets and goodwill as of the third and fourth quarters of 2022. We performed a long-lived asset recoverability tests for RocketPower and determined that undiscounted future cash flows exceeded the carrying amount of the asset group and were recoverable. We performed interim step one quantitative tests for RocketPower’s goodwill and determined that the estimated fair value of the reporting unit no longer exceeded the carrying value. Based on the result of our interim goodwill impairment tests, we recorded a total goodwill impairment charge of $41.0 million as of year-end 2022 to write-off all of RocketPower's goodwill balance. Intangible Assets Intangible assets, excluding fully-amortized intangibles, are included within other assets on our consolidated balance sheet and consist of the following (in millions of dollars): 2024 2023 Useful Lives Gross Carrying Amount Less: Accumulated Amortization Net Gross Carrying Amount Less: Accumulated Amortization Net Customer relationships 10-15 years $ 229.2 $ 65.9 $ 163.3 $ 141.1 $ 47.7 $ 93.4 Trade names 10-15 years 108.1 20.4 87.7 51.6 12.8 38.8 Non-compete agreements 5 years 5.6 2.7 2.9 4.3 1.7 2.6 Trademarks 10 years 4.8 2.4 2.4 4.8 1.9 2.9 Total $ 347.7 $ 91.4 $ 256.3 $ 201.8 $ 64.1 $ 137.7 Intangible amortization expense, which is included in SG&A expenses in the consolidated statements of earnings, was $27.3 million, $20.9 million and $19.4 million in 2024, 2023 and 2022 , respectively. The amortization expense is expected to be $30.1 million in 2025, $29.4 million in 2026, $28.8 million in 2027, $27.4 million in 2028 and $24.8 million in 2029.

Other Assets

Other Assets	12 Months Ended
	Dec. 29, 2024
Other Assets [Abstract]
Other Assets	10. Other Assets Included in other assets are the following (in millions of dollars): 2024 2023 Long-term hosted software, net of accumulated amortization of $23.5 million in 2024 and $14.2 million in 2023 (1) $ 17.9 $ 13.1 Noncurrent restricted cash 6.4 8.0 Workers' compensation and other claims receivable (2) 4.9 11.7 Equity securities (3) 11.0 7.9 Other 5.1 7.8 Total other assets (4) $ 45.3 $ 48.5 (1) Long-term hosted software represents cloud computing arrangements that are comprised of internal-use software platforms that are accounted for as service contracts (see Summary of Significant Accounting Policies footnote). (2) Workers’ compensation and other claims receivable represents receivables from the insurance company for U.S. workers’ compensation and automobile liability claims in excess of the applicable loss limits. (3) Equity securities includes $6.4 million related to our equity investment in the JV (see Investment in PersolKelly Pte. Ltd footnote). (4) Total other assets in 2023 includes $5.4 million of assets held for sale in connection with the sale of our EMEA staffing operations (see Acquisitions and Dispositions footnote).

Leases

Leases	12 Months Ended
	Dec. 29, 2024
Leases [Abstract]
Leases	11. Leases The Company has operating leases for headquarters and field offices and various equipment. Our leases generally have remaining lease terms of one year to 10 years. We determine if an arrangement is a lease at inception. The components of lease expense are as follows (in millions of dollars): December Year to Date Description Statements of Earnings Location 2024 2023 2022 Operating: Operating lease cost Selling, general and administrative expenses $ 14.6 $ 21.0 $ 22.8 Short-term lease cost Selling, general and administrative expenses 0.6 2.0 2.4 Variable lease cost Selling, general and administrative expenses 3.5 6.1 5.2 Financing: Amortization of ROU assets Selling, general and administrative expenses 0.3 0.6 0.6 Interest on lease liabilities Other income (expense), net — — 0.1 Total lease cost $ 19.0 $ 29.7 $ 31.1 Supplemental consolidated balance sheet information related to leases is as follows (in millions of dollars): Description Balance Sheet Location As of Year-End 2024 As of Year-End 2023 ROU Assets: Operating Operating lease right-of-use assets $ 47.0 (1) $ 61.3 (2) Financing Net property and equipment — 0.3 Total lease assets $ 47.0 $ 61.6 ROU Liabilities: Operating - current Operating lease liabilities, current $ 12.3 $ 14.0 (2) Operating - noncurrent Operating lease liabilities, noncurrent 50.9 51.9 (2) Total lease liabilities $ 63.2 $ 65.9 (1) ROU operating assets reflect an impairment charge of $12.1 million, related to our leased headquarters facility reflecting adjustments as to how we are utilizing the building as a part of our ongoing transformation efforts. The impairment charges related to the ROU assets are recorded in the asset impairment charge in the consolidated statements of earnings (see Restructuring and Transformation Activities footnote). (2) ROU operating assets and liabilities, current and non-current, include held for sale leases (see Acquisitions and Dispositions footnote). Weighted average remaining lease terms and discount rates for operating leases are as follows: December Year to Date 2024 2023 Weighted average remaining lease term (years): 7.0 7.3 Weighted average discount rate: 5.8 % 5.4 % Other information related to leases is as follows (in millions of dollars): December Year to Date 2024 2023 2022 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 15.0 $ 20.6 $ 22.4 Financing cash flows from financing leases — 1.2 1.4 ROU assets obtained in exchange for new lease obligations: Operating leases $ 10.4 $ 12.6 $ 10.7 Maturities of lease liabilities as of year-end 2024 are as follows (in millions of dollars): Operating Leases 2025 $ 15.5 2026 13.0 2027 9.5 2028 7.7 2029 6.9 Thereafter 23.5 Total future lease payments 76.1 Less: Imputed interest 12.9 Total $ 63.2

Debt

Debt	12 Months Ended
	Dec. 29, 2024
Debt Disclosure [Abstract]
Debt	12. Debt Revolving Credit Facility On May 29, 2024, the Company entered into an agreement with its lenders to amend and restate its existing $200.0 million, five-year revolving credit facility (the "Facility"), with a termination date of May 29, 2029. The amendment (i) decreased the current borrowing capacity to $150.0 million, (ii) added the ability to increase the borrowing capacity to an aggregate of $300.0 million and (iii) changed certain of the terms and conditions. The Facility is available to be used to fund working capital, acquisitions and general corporate needs. The Facility is secured by certain assets of the Company, excluding U.S. trade accounts receivable. At year-end 2024, there were $40.0 million of long-term borrowings on the term benchmark line under the Facility and a remaining borrowing capacity of $110.0 million. The rate for these borrowings, which varies based on the Company's leverage ratio as defined in the agreement, includes either (i) the Prime rate plus the applicable margin for the floating line or (ii) a term SOFR for 1-, 3-, or 6-months dependent on the interest election plus a 0.10% margin and the applicable margin for the term benchmark line. At year-end 2023, there were no borrowings under the Facility and a remaining borrowing capacity of $200.0 million. To maintain availability of the funds, we pay a facility fee on the full amount of the Facility, regardless of usage. The facility fee varies based on the Company’s leverage ratio as defined in the agreement. The Facility, which contains a cross-default clause that could result in termination if defaults occur under our other loan agreements, had a facility fee of 20.0 basis points at year-end 2024 and 15.0 basis points at year-end 2023. The Facility’s financial covenants and restrictions are described below, all of which were met at year-end 2024: • We must maintain a certain minimum interest coverage ratio of earnings before interest, taxes, depreciation, amortization ("EBITDA") and certain cash and non-cash charges that are non-recurring in nature to interest expense as of the end of any fiscal quarter. • We must maintain a certain maximum ratio of total indebtedness to the sum of net worth and total indebtedness at all times. • Dividends, stock buybacks and similar transactions are limited to certain maximum amounts. • We must adhere to other operating restrictions relating to the conduct of business, such as certain limitations on asset sales and the type and scope of investments. Securitization Facility On May 29, 2024, the Company and Kelly Receivables Funding, LLC, a wholly owned bankruptcy remote special purpose subsidiary of the Company (the “Receivables Entity”), amended the Receivables Purchase Agreement related to its $150.0 million, three-year, securitization facility (the “Securitization Facility”). The amendment (i) increased the current borrowing capacity to $250.0 million, (ii) includes the ability to increase the borrowing capacity to an aggregate of $350.0 million, (iii) changed certain of the terms and conditions and (iv) has a termination date of May 28, 2027. Under the Securitization Facility, the Company will sell certain trade receivables and related rights ("Receivables"), on a revolving basis, to the Receivables Entity. The Receivables Entity may from time to time sell an undivided variable percentage ownership interest in the Receivables. The Securitization Facility, which contains a cross-default clause that could result in termination if defaults occur under our other loan agreements, also allows for the issuance of standby letters of credit ("SBLC") and contains certain restrictions based on the performance of the Receivables. At year-end 2024, the Securitization Facility had $199.4 million of long-term borrowings, SBLCs of $46.1 million related to workers’ compensation and a remaining capacity of $4.5 million. The rate for these borrowings includes the adjusted daily SOFR plus a 0.10% margin and a 1.10% utilization rate on the amount of our borrowings. The rate for the SBLCs of 1.10% represents a utilization rate on the outstanding balance. In addition, we pay a commitment fee of 40.0 basis points on the unused capacity. At year-end 2023, the Securitization Facility had no borrowings, SBLCs of $49.4 million related to workers’ compensation at a utilization rate of 0.90% and a remaining capacity of $100.6 million. In addition, we paid a commitment fee of 40.0 basis points on the unused capacity in 2023. On July 17, 2024, we entered into a $50.0 million 12-month interest rate swap and a $50.0 million 18-month interest rate swap that effectively locked in the variable SOFR component of our interest rate for a portion of the long-term borrowings on the Securitization Facility at a fixed rate of 4.772% and 4.468% from the effective date through July 17, 2025 and January 17, 2026, respectively. As of year-end 2024, the Company recorded a loss of $0.2 million and a corresponding liability of $0.4 million related to mark-to-market changes in fair value of the interest rate swaps (see Fair Value Measurements footnote). The Receivables Entity’s sole business consists of the purchase or acceptance through capital contributions of trade accounts receivable and related rights from the Company. As described above, the Receivables Entity may retransfer these receivables or grant a security interest in those receivables under the terms and conditions of the Receivables Purchase Agreement. The Receivables Entity is a separate legal entity with its own creditors who would be entitled, if it were ever liquidated, to be satisfied out of its assets prior to any assets or value in the Receivables Entity becoming available to its equity holders, the Company. The assets of the Receivables Entity are not available to pay creditors of the Company or any of its other subsidiaries, until the creditors of the Receivables Entity have been satisfied. The assets and liabilities of the Receivables Entity are included in the consolidated financial statements of the Company. Local Credit Facilities The Company had total unsecured, uncommitted short-term local credit facilities of $3.1 million as of year-end 2024. There were no borrowings under these lines at year-end 2024 and 2023.

Retirement Benefits

Retirement Benefits	12 Months Ended
	Dec. 29, 2024
Retirement Benefits [Abstract]
Retirement Benefits	13. Retirement Benefits U.S. Defined Contribution Plans The Company provides a qualified defined contribution plan covering substantially all U.S.-based full-time employees, except officers and certain other employees. The plan offers a savings feature with Company matching contributions. Assets of this plan are held by an independent trustee for the sole benefit of participating employees. A nonqualified plan is provided for officers and certain other employees. This plan includes provisions for salary deferrals and Company matching contributions. In addition to the plans above, the Company also provides a qualified plan and a nonqualified plan to certain U.S.-based temporary employees. The liability for the nonqualified plans was $260.5 million and $233.8 million as of year-end 2024 and 2023, respectively, the current portion of which is included in current accrued payroll and related taxes in the consolidated balance sheet. The cost of participants’ earnings or loss on this liability, which were included in SG&A expenses in the consolidated statements of earnings, was earnings of $29.8 million in 2024, earnings of $32.9 million in 2023 and a loss of $36.3 million in 2022. In connection with the administration of these plans, the Company has purchased company-owned variable universal life insurance policies insuring the lives of certain current and former officers and key employees. The cash surrender value of these policies, which is based primarily on investments in mutual funds and can only be used for payment of the Company’s obligations related to the nonqualified deferred compensation plan noted above, was $258.1 million and $230.3 million at year-end 2024 and 2023, respectively, and is reflected as a discrete line item in the consolidated balance sheet. During 2024, there were proceeds of $1.7 million in connection with these policies. In 2023, there were no proceeds in connection with these policies. In 2022, proceeds of $1.5 million were received in connection with these policies. Tax-free earnings or loss on these assets, which were included in SG&A expenses in the consolidated statements of earnings and which offset the related earnings or loss on the liability, were earnings of $30.9 million in 2024, earnings of $32.2 million in 2023 and a loss of $36.0 million in 2022. The net expense for retirement benefits for the qualified and nonqualified plans, including Company-matching contributions for full-time employees, totaled $8.6 million in 2024, $10.9 million in 2023 and $9.4 million in 2022, and is included in total SG&A expenses in the consolidated statements of earnings. The expense related to retirement plan contributions for temporary employees is included in cost of services in the consolidated statements of earnings. International Defined Benefit Plans The Company had several defined benefit pension plans in locations outside of the United States. The total projected benefit obligation, assets and unfunded liability for these plans as of year-end 2023 were $9.7 million, $8.0 million and $1.7 million, respectively, all of which were included as held for sale (see Acquisitions and Dispositions footnote). Total pension expense for these plans was $0.2 million in 2023 and $0.4 million in 2022. These plans are no longer effective in 2024.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 29, 2024
Stockholders' Equity Note [Abstract]
Stockholders' Equity	14. Stockholders’ Equity Common Stock The authorized capital stock of the Company is 100,000,000 shares of Class A common stock and 10,000,000 shares of Class B common stock. Class A shares have no voting rights and are not convertible. Class B shares have voting rights and are convertible by the holder into Class A shares on a share-for-share basis at any time. Both classes of stock have identical rights in the event of liquidation. The voting rights of Class B shares are perpetual and Class B shares are not subject to transfer restrictions or mandatory conversion obligations under the Company's certificate of incorporation or bylaws. Class A shares and Class B shares are both entitled to receive dividends, subject to the limitation that no cash dividend on the Class B shares may be declared unless the board of directors declares an equal or larger cash dividend on the Class A shares. As a result, a cash dividend may be declared on the Class A shares without declaring a cash dividend on the Class B shares. In November 2024, the Company's board of directors authorized a $50.0 million Class A share repurchase program that expires on December 2, 2026. During December 2024, the Company repurchased 742,163 Class A shares for $10.0 million at an average price of $13.49 per share. A total of $40.0 million remains available under the share repurchase program as of year-end 2024. In November 2022, the Company's board of directors authorized a $50.0 million Class A share repurchase program, which was completed in August 2023. During 2023 and 2022, the Company repurchased 2,496,827 Class A shares for $42.2 million and 474,644 Class A shares for $7.8 million, respectively. There were no remaining shares available under the share repurchase program as of year-end 2023 as compared to $42.2 million remaining shares available under the share repurchase program as of year-end 2022. A total of 2,971,471 shares were repurchased under the share repurchase program at an average price of $16.83 per share. Accumulated Other Comprehensive Income (Loss) The changes in accumulated other comprehensive income (loss) by component, net of tax, during 2024, 2023 and 2022 are included in the table below (in millions of dollars). Amounts in parentheses indicate debits. 2024 2023 2022 Foreign currency translation adjustments: Beginning balance $ 0.6 $ (7.4) $ (25.0) Other comprehensive income (loss) before classifications (6.9) 8.0 (7.5) Amounts reclassified from accumulated other comprehensive income (loss) - liquidation of Japan subsidiary — — 20.4 (1) Amounts reclassified from accumulated other comprehensive income (loss) - equity method investment and other (0.6) — 4.7 (2) Net current-period other comprehensive income (loss) (7.5) 8.0 17.6 Ending balance (6.9) 0.6 (7.4) Pension liability adjustments: Beginning balance (0.4) (1.1) (2.7) Other comprehensive income (loss) before classifications — 0.6 1.5 Amounts reclassified from accumulated other comprehensive income 0.4 (3) 0.1 (3) 0.1 (3) Net current-period other comprehensive income (loss) 0.4 0.7 1.6 Ending balance — (0.4) (1.1) Total accumulated other comprehensive income (loss) $ (6.9) $ 0.2 $ (8.5) (1) Amount was recorded in the loss on currency translation from liquidation of subsidiary in the consolidated statements of earnings. (2) Of the amount included in this line item $1.9 million in 2022 was recorded in the other income (expense), net line item in the consolidated statements of earnings related to the investment in PersolKelly Pte. Ltd. (see Investment in PersolKelly Pte. Ltd. footnote for more details). In addition, $1.4 million in 2022 was recorded in the other income (expense), net line item in the consolidated statements of earnings related to other activities and $1.4 million in 2022 was recorded in loss on disposal line item in the consolidated statements of earnings related to the liquidation of the cumulative translation adjustment for the sale of our Russia operations (see Acquisitions and Dispositions footnote for more details). All amounts in prior years were recorded in other income (expense), net in the consolidated statements of earnings. (3) Amount was recorded in SG&A expenses in the consolidated statements of earnings.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	12 Months Ended
	Dec. 29, 2024
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	15. Earnings (Loss) Per Share The reconciliation of basic earnings (loss) per share on common stock for 2024, 2023 and 2022 follows (in millions of dollars except per share data): 2024 2023 2022 Net earnings (loss) $ (0.6) $ 36.4 $ (62.5) Less: Earnings allocated to participating securities — (0.7) — Net earnings (loss) available to common shareholders $ (0.6) $ 35.7 $ (62.5) Average common shares outstanding (millions): Basic 35.5 35.9 38.1 Dilutive share awards — 0.4 — Diluted 35.5 36.3 38.1 Basic earnings (loss) per share $ (0.02) $ 0.99 $ (1.64) Diluted earnings (loss) per share $ (0.02) $ 0.98 $ (1.64) Due to our net loss in 2024, potentially dilutive shares outstanding, primarily related to deferred common stock associated with the non-employee directors deferred compensation plan and performance shares, of 0.4 million shares in 2024, had an anti-dilutive effect on diluted earnings per share and were excluded from the computation. Potentially dilutive shares outstanding for 2023 are primarily related to deferred common stock related to the non-employee directors deferred compensation plan and performance shares (see Stock-Based Compensation footnote for a description of performance shares). Due to our net loss in 2022, potentially dilutive shares outstanding, primarily related to deferred common stock associated with the non-employee directors deferred compensation plan, of 0.2 million shares in 2022, had an anti-dilutive effect on diluted earnings per share and were excluded from the computation. We have presented earnings per share for our two classes of common stock on a combined basis. This presentation is consistent with the earnings per share computations that result for each class of common stock utilizing the two-class method as described in ASC Topic 260, “Earnings Per Share.” The two-class method is an earnings allocation formula which determines earnings per share for each class of common stock according to the dividends declared (or accumulated) and participation rights in the undistributed earnings. In applying the two-class method, we have determined that the undistributed earnings should be allocated to each class on a pro rata basis after consideration of all of the participation rights of the Class B shares (including voting and conversion rights) and our history of paying dividends equally to each class of common stock on a per share basis. The Company’s certificate of incorporation allows the board of directors to declare a cash dividend to Class A shares without declaring equal dividends to the Class B shares. Class B shares’ voting and conversion rights, however, effectively allow the Class B shares to participate in dividends equally with Class A shares on a per share basis. The Class B shares are the only shares with voting rights. The Class B shareholders are therefore able to exercise voting control with respect to all matters requiring stockholder approval, including the election of or removal of directors. The board of directors has historically declared and the Company historically has paid equal per share dividends on both the Class A and Class B shares. Each class has participated equally in all dividends declared since 1987. In addition, Class B shares are convertible, at the option of the holder, into Class A shares on a one-for-one basis. As a result, Class B shares can participate equally in any dividends declared on the Class A shares by exercising their conversion rights. Dividends paid per share for Class A and Class B common stock were $0.30 for 2024, $0.30 for 2023 and $0.275 for 2022.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 29, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	16. Stock-Based Compensation Under the Equity Incentive Plan, amended and restated February 15, 2017 and approved by the stockholders of the Company on May 10, 2017 (the “EIP”), the Company may grant to key employees restricted stock and performance awards associated with the Company’s Class A stock. The amended EIP provides that the maximum number of shares available for grants is 4.7 million. Shares available for future grants at year-end 2024 are 1.3 million. The Company issues shares out of treasury stock to satisfy stock-based awards, if available; otherwise new shares of common stock are issued from authorized shares. The Company presently has no intent to repurchase additional shares for the purpose of satisfying stock-based awards. The Company recognized stock-based compensation cost of $11.8 million in 2024, $9.7 million in 2023 and $7.8 million in 2022, as well as related tax benefits of $2.6 million in 2024, $1.7 million in 2023 and $1.1 million in 2022. Restricted Stock Restricted stock, which typically vests pro-rata over three A summary of the status of nonvested restricted stock as of year-end 2024 and changes during this period is presented as follows below (in thousands of shares except per share data): Restricted Stock Weighted Average Grant Date Fair Value Nonvested at year-end 2023 784 $ 18.52 Granted 651 20.70 Vested (297) 18.62 Forfeited (77) 19.07 Nonvested at year-end 2024 1,061 $ 19.79 As of year-end 2024, unrecognized compensation cost related to unvested restricted stock totaled $14.5 million. The weighted average period over which this cost is expected to be recognized is approximately 1.3 years. The weighted average grant date fair value per share of restricted stock granted during 2024, 2023 and 2022 was $20.70, $17.33 and $20.16, respectively. The total fair value of restricted stock, which vested during 2024, 2023 and 2022, was $6.5 million, $3.3 million and $2.3 million, respectively. Performance Shares During 2024, 2023 and 2022, the Company granted performance awards associated with the Company’s Class A stock to certain senior officers, which are contingent upon achievement of specific revenue growth and EBITDA margin performance goals over a stated period of time ("performance awards"). The maximum number of performance shares that may be earned is 200% of the target shares originally granted. These awards have three one-year performance periods with the payout for each performance period based on separate financial measure goals that are set in February of each of the three performance periods. Earned shares during each performance period will cliff vest in February subsequent to the third performance period, after approval of the financial results by the Compensation Committee, if not forfeited by the recipient. No dividends are paid on these performance shares. On February 11, 2025, the Compensation Committee approved the actual performance achievement of 76% of target for the 2024 performance period of the annual 2024, 2023 and 2022 annual grants. All of the shares earned for the 2024 performance period will cliff vest in February 2027, 2026 and 2025, respectively, if not forfeited by the recipient. The 2024, 2023 and 2022 performance awards have a weighted average grant date fair value of $19.96, $16.87 and $19.07, respectively, which was determined by the market price on the date of grant less the present value of the expected dividends not received during the vesting period. The total nonvested shares related to 2024, 2023 and 2022 performance awards at year-end 2024 is 170,000, 211,000 and 165,000, respectively. In December 2021, the Compensation Committee approved a retention-based grant of 308,000 performance awards to certain senior officers which may be earned upon achievement of three financial goals over a performance period beginning in fiscal 2022 through the third quarter of 2024, with each goal having a unique projected achievement date. Each goal can be earned independent of the other two goals. Any shares earned during the performance period will cliff-vest three years after achievement of the respective performance goals and approval of the financial results by the Compensation Committee. On May 7, 2024, the Compensation Committee confirmed the actual performance achievement for the final financial goal related to the 2021 retention-based grant, which was not achieved before the end of the performance period and resulted in no payout. In December 2020, the Company granted 115,000 performance shares to certain senior officers, which were contingent upon the achievement of a specific operating earnings performance goal with a one-year performance period. These performance shares vest over four years and earn dividends, which are not paid until the awards vest, if not forfeited by the recipient. The 2020 performance awards had a weighted average grant date fair value of $22.59 per share, which was determined by the market price on the date of grant. On February 15, 2022, the Compensation Committee approved the actual performance achievement of these performance awards. The total nonvested shares related to 2020 performance awards at year-end 2024 is 22,000. A summary of the status of nonvested performance shares at target as of year-end 2024 and changes during this period is presented as follows below (in thousands of shares except per share data). The vesting adjustment in the table below represents 2021 performance shares that did not vest because actual achievement was below the threshold level or was not achieved, and resulted in no payout. Performance Shares Shares Weighted Average Grant Date Fair Value Nonvested at year-end 2023 674 $ 17.49 Granted 170 19.96 Vested (136) 18.88 Forfeited (33) 17.99 Vesting Adjustment (107) 16.52 Nonvested at year-end 2024 568 $ 18.66 As of year-end 2024, unrecognized compensation cost related to all unvested performance shares totaled $3.4 million. The weighted average period over which the costs are expected to be recognized is approximately 1.3 years for performance shares. The total fair value of performance shares, which vested during 2024, 2023 and 2022, was $2.6 million, $3.4 million and $0.9 million, respectively.

Sale of Assets

Sale of Assets	12 Months Ended
	Dec. 29, 2024
Sale of Assets [Abstract]
Sale of Assets	17. Sale of Assets On June 10, 2024, the Company sold Ayers Group, a division of our OCG segment, for a purchase price of $7.5 million, subject to final closing adjustments. The Company received cash proceeds of $4.5 million in the second quarter of 2024 for assets sold with a net carrying value of $1.0 million. In the third quarter of 2024, a post-close net working capital adjustment of $0.1 million was recorded in gain on sale of assets in the consolidated statements of earnings. A gain of $5.4 million was recorded in gain on sale of assets for the year-ended 2024 in the consolidated statements of earnings. The sale was a part of the Company's ongoing strategy to further optimize its operating model. In October 2022, Kelly Properties, LLC, a wholly owned subsidiary of the Company, sold real property located in Troy, Michigan for a purchase price of $6.0 million, subject to final closing adjustments. The Company received cash proceeds of $5.6 million in the fourth quarter of 2022, net of commissions and transaction expenses. As of the date of the sale, the property had a carrying value of $4.7 million, resulting in a $0.9 million gain on the sale, which was recorded in gain on sale of assets in the consolidated statements of earnings. In June 2022, the Company sold an under-utilized real property for a purchase price of $4.5 million, subject to final closing adjustments. The Company received cash proceeds of $3.6 million in the second quarter of 2022 and previously received cash proceeds of $0.8 million as a deposit in 2021 when the contract was first executed. As of the date of the sale, the land had insignificant carrying value; as such, the resulting gain on the sale was $4.4 million, which was recorded in gain on sale of assets in the consolidated statements of earnings. In January 2022, the Company sold a property for a purchase price of $0.9 million, subject to final closing adjustments. The Company received cash proceeds of $0.9 million in the first quarter of 2022. As of the date of the sale, the property had an immaterial carrying value; as such, the resulting gain on the sale of the property was $0.9 million, which was recorded in gain on sale of assets in the consolidated statements of earnings.

Other Income (Expense), Net

Other Income (Expense), Net	12 Months Ended
	Dec. 29, 2024
Other Income and Expenses [Abstract]
Other Income (Expense), Net	18. Other Income (Expense), Net Included in other income (expense), net are the following (in millions of dollars): 2024 2023 2022 Interest income $ 6.8 $ 6.7 $ 2.3 Interest expense (10.9) (3.2) (2.1) Foreign exchange gains (losses) 0.5 (1.5) 4.8 Other (3.2) (1.4) (3.4) Other income (expense), net $ (6.8) $ 0.6 $ 1.6

Income Taxes

Income Taxes	12 Months Ended
	Dec. 29, 2024
Income Tax Disclosure [Abstract]
Income Taxes	19. Income Taxes Earnings (loss) before taxes and equity in net earnings of affiliate for the years 2024, 2023 and 2022 were taxed under the following jurisdictions (in millions of dollars): 2024 2023 2022 Domestic $ (33.2) $ 29.9 $ (39.4) Foreign 11.3 (5.0) (31.8) Total $ (21.9) $ 24.9 $ (71.2) The provision for income taxes was as follows (in millions of dollars): 2024 2023 2022 Current tax expense: U.S. federal $ (0.7) $ 1.0 $ 1.3 U.S. state and local (0.8) 2.5 1.4 Foreign 8.0 9.9 61.5 Total current 6.5 13.4 64.2 Deferred tax (benefit) expense: U.S. federal (24.9) (36.8) (2.5) U.S. state and local (2.6) (3.6) 0.7 Foreign (0.3) 15.5 (70.3) Total deferred (27.8) (24.9) (72.1) Total provision $ (21.3) $ (11.5) $ (7.9) Deferred income taxes reflect the temporary differences between the asset and liability basis for financial reporting purposes and the amounts used for income tax purposes, at the relevant tax rate. The deferred tax assets and liabilities are comprised of the following (in millions of dollars): 2024 2023 Fixed assets and right-of-use assets $ (15.2) $ (19.0) Intangible assets and goodwill 0.1 19.0 Employee compensation and benefit plans 77.0 71.5 Outside basis difference on held for sale assets — 34.7 Operating lease liabilities 17.7 18.3 Net operating loss carryforwards 10.9 36.7 Capital loss carryforward 19.6 — Credit carryforwards 230.6 208.7 Other, net 23.6 15.4 Valuation allowance (34.2) (60.5) Net deferred tax assets $ 330.1 $ 324.8 As of year-end 2024, the net deferred tax asset balance totaled $330.1 million which is fully recorded in deferred taxes in the consolidated balance sheet. As of year-end 2023, the net deferred tax asset balance totaled $324.8 million with $321.1 million in deferred taxes, $4.1 million in assets held for sale (see Acquisitions and Dispositions footnote), and $0.4 million in other long-term liabilities in the consolidated balance sheet. The Company has U.S. general business credit carryforwards of $197.3 million which will expire from 2034 to 2044, foreign tax credit carryforwards of $33.2 million which will expire from 2026 to 2034 and minimal state and foreign credit carryforwards which are either indefinite or will expire from 2025 to 2043. The net tax effect of federal, state and foreign loss carryforwards at year-end 2024 totaled $30.5 million, comprised of $19.6 million of capital loss carryforwards that expire in 2029, and $10.9 million of net operating loss carryforwards of which $9.1 million have no expiration and $1.8 million expire between 2025 and 2044. The Company has established a valuation allowance for certain loss carryforwards, future deductible items, outside basis differences, and for a portion of its U.S. foreign tax credit carryforwards. The decrease in valuation allowance during 2024 was primarily due to the Company’s sale of its EMEA staffing operations which included companies with $24.4 million of valuation allowances. The outside basis difference included in the 2023 deferred balance was for held for sale assets at the end of 2023 which were sold during the first quarter of 2024 when the Company completed the sale of its EMEA staffing operations. This transaction generated a capital loss, $19.6 million of which is carried forward. A valuation allowance of $21.4 million was recorded against the outside basis difference at year-end 2023, and $19.2 million against the capital loss carryforward at year-end 2024. The foreign tax credit valuation allowance is $15.0 million at year-end 2024 and $14.5 million at year-end 2023 and will continue to be monitored. The valuation allowance is determined in accordance with the provisions of ASC 740, "Income Taxes," which requires an assessment of both negative and positive evidence when measuring the need for a valuation allowance. The Company’s uncertainty in the ability to create future capital gains, and its recent lack of adequate U.S. foreign source income to fully utilize foreign tax credit carryforwards, represented sufficient negative evidence to require a valuation allowance under ASC 740. The Company intends to maintain a valuation allowance until sufficient positive evidence exists to support realization of the deferred tax assets The differences between income taxes from continuing operations for financial reporting purposes and the U.S. statutory rate of 21% in 2024, 2023, and 2022 are as follows (in millions of dollars): 2024 2023 2022 Income tax based on statutory rate $ (4.6) $ 5.2 $ (14.9) State income taxes, net of federal benefit (2.7) (0.9) 1.6 Foreign tax rate differential 0.9 4.6 1.6 U.S. work opportunity credits (7.8) (8.5) (10.7) Life insurance cash surrender value (6.2) (6.5) 7.8 Foreign items 0.3 3.0 0.1 Foreign-derived intangible income deduction (3.0) (2.3) (2.3) Sale of foreign subsidiaries 0.4 — 3.9 Foreign business taxes — 1.1 1.8 Change in deferred tax realizability (0.4) 4.4 — Non-deductible expenses 2.1 0.7 — Uncertain tax positions — (0.3) 0.1 Stock compensation 0.4 0.7 0.6 Outside basis difference on held for sale assets — (13.1) — MRP earnout liability revaluation (0.7) — — Non-deductible goodwill impairment — — 2.7 Other — 0.4 (0.2) Total $ (21.3) $ (11.5) $ (7.9) Our tax benefit or expense is affected by recurring items, such as the amount of pretax income and its mix by jurisdiction, U.S. work opportunity credits and the change in cash surrender value of non-taxable investments in life insurance policies. It is also affected by discrete items that may occur in any given period but are not consistent from period to period, such as tax law changes or changes in judgment regarding the realizability of deferred tax assets. Several items have contributed to the variance in our income tax benefit over the last three years. 2024 benefited from lower pretax earnings, which included an $18.5 million benefit from the impairment of tax-deductible goodwill and a $6.2 million benefit from tax-exempt life insurance cash surrender value gains. 2023 benefited from recording a $15.0 million federal and state benefit on the outside basis difference in held for sale assets, and a $6.5 million benefit from tax-exempt life insurance cash surrender value gains. 2022 benefited from lower pretax earnings, which included benefits of $16.9 million from changes in the fair value of the Company's investment in Persol Holdings and $7.1 million from the impairment of tax-deductible goodwill. These benefits were offset by a $7.8 million charge from tax exempt life insurance cash surrender value losses. Foreign items include foreign tax credits, foreign non-deductible expenses and non-taxable income. Foreign business taxes include the French business tax and other taxes based on revenue less certain expenses and are classified as income taxes under ASC 740. Provision has not been made for additional income taxes on an estimated $65.6 million of foreign subsidiary undistributed earnings which are indefinitely reinvested. If these earnings were to be repatriated, the Company could be subject to foreign withholding tax, federal and state income tax, net of federal benefit, and income taxes on foreign exchange gains or losses, of $4.7 million. The new Organization for Economic Cooperation and Development ("OECD") Pillar Two global minimum tax rules became effective in 2024 in several jurisdictions in which the Company does business. This did not have a material impact to the Company in 2024. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions of dollars): 2024 2023 2022 Balance at beginning of the year $ 0.6 $ 0.5 $ 0.6 Additions for prior years’ tax positions — 0.3 — Reductions for prior years’ tax positions — — — Additions for settlements — — — Reductions for settlements — — — Reductions for expiration of statutes (0.1) (0.2) (0.1) Balance at end of the year $ 0.5 $ 0.6 $ 0.5 If the $0.5 million in 2024, $0.6 million in 2023 and $0.5 million in 2022 of unrecognized tax benefits were recognized, they would have a favorable effect of $0.4 million in 2024, $0.5 million in 2023 and $0.4 million in 2022 on income tax expense. The Company recognizes both interest and penalties as part of the income tax provision. The Company recognized an insignificant benefit in 2024 and $0.1 million of expense in 2023, for interest and penalties. The benefit recognized in 2022 was not significant. Accrued interest and penalties were $0.2 million at year-end 2024 and $0.2 million at year-end 2023. The Company files income tax returns in the U.S. and in various states and foreign countries. The tax periods open to examination by the major taxing jurisdictions to which the Company is subject include the U.S. for fiscal years 2021 forward, Canada for fiscal years 2017 forward, Puerto Rico for fiscal years 2020 forward and Mexico for fiscal years 2019 forward. The Company and its subsidiaries have various income tax returns in the process of examination. The unrecognized tax benefit and related interest and penalty balances include an insignificant amount for 2024, related to tax positions which are reasonably possible to change within the next twelve months due to income tax audits, settlements and statute expirations.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 29, 2024
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	20. Supplemental Cash Flow Information Changes in operating assets and liabilities, net of acquisitions, as disclosed in the statements of cash flows, for the fiscal years 2024, 2023 and 2022, respectively, were as follows: 2024 2023 2022 (In millions of dollars) (Increase) decrease in trade accounts receivable $ (20.9) $ 147.2 $ (99.3) (Increase) decrease in prepaid expenses and other assets 2.8 (10.7) (24.6) (Increase) decrease in ROU assets 0.2 (2.2) (0.1) Increase (decrease) in accounts payable and accrued liabilities (31.1) (62.5) 44.3 Increase (decrease) in operating lease liabilities (12.1) (14.3) (18.7) Increase (decrease) in accrued payroll and related taxes (13.6) (59.8) (59.3) Increase (decrease) in accrued workers’ compensation and other claims 0.7 0.3 (5.2) Increase (decrease) in income and other taxes (3.2) — 21.9 Total changes in operating assets and liabilities, net of acquisitions $ (77.2) $ (2.0) $ (141.0) The Company paid interest of $10.0 million in 2024, $2.8 million in 2023 and $1.3 million in 2022. The Company paid income taxes of $10.9 million in 2024, $8.9 million in 2023 and $61.2 million in 2022. Non-cash capital accruals totaled $1.6 million, $0.4 million and $1.2 million at year-end 2024, 2023 and 2022, respectively.

Commitments

Commitments	12 Months Ended
	Dec. 29, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments	21. Commitments In addition to lease agreements (see Leases footnote) and the indemnification agreements related to the sale of our EMEA staffing and Brazil operations (see Acquisitions and Dispositions footnote), the Company has entered into non-cancelable purchase obligations totaling $72.5 million. These obligations relate primarily to technology services and online tools which the Company expects to utilize generally within the next three fiscal years, in the ordinary course of business. The Company has no material unrecorded commitments, losses, contingencies or guarantees associated with any related parties or unconsolidated entities. See the Debt and Retirement Benefits footnotes for commitments related to debt and pension obligations.

Contingencies

Contingencies	12 Months Ended
	Dec. 29, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingencies	22. Contingencies The Company is continuously engaged in litigation, threatened litigation, claims, audits or investigations arising in the ordinary course of its business, such as matters alleging employment discrimination, wage and hour violations, claims for indemnification or liability, violations of privacy rights, anti-competition regulations, commercial and contractual disputes, and tax-related matters which could result in a material adverse outcome. We record accruals for loss contingencies when we believe it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Such accruals are recorded in accounts payable and accrued liabilities and in accrued workers’ compensation and other claims in the consolidated balance sheet. At year-end 2024 and 2023, the gross accrual for litigation costs amounted to $1.5 million and $6.4 million, of which $1.5 million was held for sale (see Acquisitions and Dispositions footnote), respectively. The Company maintains insurance coverage which may cover certain losses. When losses exceed the applicable policy deductible and realization of recovery of the loss from existing insurance policies is deemed probable, the Company records receivables from the insurance company for the excess amount, which are included in prepaid expenses and other current assets and other assets in the consolidated balance sheet. At year-end 2024, there were no related insurance receivables. At year-end 2023, the related insurance receivables amounted to $0.2 million. The Company estimates the aggregate range of reasonably possible losses, in excess of amounts accrued, is $0.1 million to $1.2 million. This range includes matters where a liability has been accrued but it is reasonably possible that the ultimate loss may exceed the amount accrued and for matters where a loss is believed to be reasonably possible, but a liability has not been accrued. The aggregate range only represents matters in which we are currently able to estimate a range of loss and does not represent our maximum loss exposure. The estimated range is subject to significant judgment and a variety of assumptions and only based upon currently available information. For other matters, we are currently not able to estimate the reasonably possible loss or range of loss. While the ultimate outcome of these matters cannot be predicted with certainty, we believe that the resolution of any such proceedings will not have a material adverse effect on our financial condition, results of operations or cash flows.

Segment Disclosures

Segment Disclosures	12 Months Ended
	Dec. 29, 2024
Segment Reporting [Abstract]
Segment Disclosures	23. Segment Disclosures The Company’s operating segments, which also represent its reportable segments, are based on the organizational structure for which financial results are regularly evaluated by the Company’s chief operating decision-maker ("CODM", the Company’s CEO) to determine resource allocation and assess performance. The Company’s four reportable segments in 2024, (1) Professional & Industrial (P&I), (2) Science, Engineering & Technology (SET), (3) Education (EDU), and (4) Outsourcing & Consulting (OCG), reflect the specialty services the Company provides to customers and represent how the business is organized internally. Prior to 2024, the Company also had an International operating segment. Beginning in the first quarter of 2024, the Company's organizational structure no longer includes the International segment following the sale of the EMEA staffing operations in January 2024. Our Mexico operations, which were previously in our International segment, are now included in the Professional & Industrial segment. Professional & Industrial segment information for the prior years has been recast to conform to the new structure. Intersegment revenue represents revenue earned between the reportable segments and is eliminated from total segment revenue from services. P&I delivers staffing, outcome-based and permanent placement services, providing administrative, accounting and finance, light industrial and contact center staffing and other workforce solutions in the U.S. and Canada, including our KellyConnect and Skilled Professional Solutions products. SET provides highly specialized skills to a variety of industries through staffing, outcome-based, talent solutions, and permanent placement services. SET is focused on science and clinical research, engineering, technology and telecommunications specialties predominantly in the U.S. and Canada and includes MRP, Softworld, NextGen and Global Technology Associates ("GTA") brands. EDU delivers high quality education and therapy services talent through staffing, permanent placement and executive search services to Pre-K-12 school districts and education organizations across the U.S. and includes Teachers On Call, Greenwood/Asher and PTS brands. OCG provides global talent supply chain and workforce solutions, including MSP, RPO, PPO and executive coaching programs to customers on a global basis and includes our RocketPower brand. The Company utilizes a shared services approach for certain enterprise functions including IT, human resources, legal and finance support in the US and Canada. Expenses incurred to directly support the operating units have been allocated to Professional & Industrial, Science, Engineering & Technology, Education, Outsourcing & Consulting and International based on work effort, volume or, in the absence of a readily available measurement process, proportionately based on gross profit realized. Certain expenses related to incentive compensation, law and risk management, certain finance and accounting functions, executive management and corporate campus facilities do not directly benefit a specific operating segment and are not included in the segment results. These costs, as well as costs related to acquisition integration and transformation activities and disposition transition expenses, are included in Corporate expenses in the following tables. In addition to the change in our segment structure in the first quarter of 2024, we reassessed the allocation of corporate expenses to the operating segments and allocated additional costs which are attributable to the business from corporate. In the first quarter of 2024, the Company changed the segment profitability measure from earnings from operations to a business unit profit measure that excludes depreciation and amortization. This change provides management with greater visibility into the financial performance of the segments and how they contribute to the Company's overall performance. The CODM leverages the business unit profit measure during the annual budgeting and forecasting processes, as well as to assess segment profitability, guide resource allocation, and evaluate the alignment of compensation plans with strategic goals. The following tables present information about the reported revenue from services of the Company by reportable segment, along with a reconciliation to earnings (loss) before taxes and equity in net earnings of affiliate, for 2024, 2023 and 2022. Asset information by reportable segment is not presented, since the Company does not produce such information internally nor does it use such information to manage its business. Prior periods have been recast to reflect the current period allocation method and new segment profitability measurement. The update had no impact on the consolidated financial information. Fiscal Year Ended December 29, 2024 (In millions of dollars) P&I SET EDU OCG Inter-Segment Consolidated Revenue from services $ 1,470.7 $ 1,422.8 $ 972.3 $ 468.3 $ (2.3) $ 4,331.8 Cost of services (1) 1,209.4 1,087.2 832.5 322.4 (2.3) 3,449.2 Direct salaries (2) 141.2 170.5 60.5 104.3 Other segment expenses (3) 85.4 75.3 35.4 35.9 SG&A expenses 226.6 245.8 95.9 140.2 — 708.5 Goodwill impairment charge — 72.8 — — — 72.8 Business unit profit (loss) $ 34.7 $ 17.0 $ 43.9 $ 5.7 $ — $ 101.3 Corporate SG&A (58.4) Asset impairment charge (13.5) Gain on sale of assets 5.4 Gain on sale of EMEA staffing operations 1.6 Depreciation and amortization (4) (51.5) Consolidated earnings from operations (15.1) Other income (expense), net (6.8) Earnings before taxes $ (21.9) (1) Cost of services are those costs directly associated with the earning of revenue. The primary examples of these types of costs are temporary employee wages, along with other employee related costs, including associated payroll taxes, temporary employee benefits, such as service bonus and holiday pay and health insurance, and workers’ compensation costs. These costs differ fundamentally from SG&A expenses in that they arise specifically from the action of providing our services to customers whereas SG&A costs are incurred regardless of whether or not we place temporary employees with our customers. (2) Direct salaries refers to the compensation expenses for employees directly related to the Company’s operations and service delivery. These expenses include salaries, related payroll taxes, various benefits and performance-based incentives and bonuses for these employees. (3) For each reportable segment, the other segment expense category includes: • P&I - Shared services costs for IT, human resources, legal and finance support, facilities and equipment-related costs, other professional services and overhead expenses, and operational software licenses. • SET - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • EDU - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • OCG - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, operational software licenses, and facilities and equipment-related costs. (4) Represents total company depreciation and amortization of intangibles, including the amortization of hosted software. Fiscal Year Ended December 31, 2023 (In millions of dollars) P&I SET EDU OCG International Inter-Segment Consolidated Revenue from services $ 1,539.5 $ 1,190.8 $ 841.9 $ 454.7 $ 812.1 $ (3.3) $ 4,835.7 Cost of services (1) 1,262.4 918.8 713.2 291.2 692.0 (3.3) 3,874.3 Direct salaries (2) 163.5 127.1 59.6 116.6 83.6 Other segment expenses (3) 97.3 69.8 32.8 42.7 38.4 SG&A expenses 260.8 196.9 92.4 159.3 122.0 — 831.4 Asset impairment charge 0.3 0.1 — 2.0 — — 2.4 Business unit profit (loss) $ 16.0 $ 75.0 $ 36.3 $ 2.2 $ (1.9) $ — $ 127.6 Corporate SG&A (63.2) Depreciation and amortization (4) (40.1) Consolidated earnings from operations 24.3 Other income (expense), net 0.6 Earnings before taxes $ 24.9 (1) Cost of services are those costs directly associated with the earning of revenue. The primary examples of these types of costs are temporary employee wages, along with other employee related costs, including associated payroll taxes, temporary employee benefits, such as service bonus and holiday pay and health insurance, and workers’ compensation costs. These costs differ fundamentally from SG&A expenses in that they arise specifically from the action of providing our services to customers whereas SG&A costs are incurred regardless of whether or not we place temporary employees with our customers. (2) Direct salaries refers to the compensation expenses for employees directly related to the Company’s operations and service delivery. These expenses include salaries, related payroll taxes, various benefits and performance-based incentives and bonuses for these employees. In the International segment, this includes costs related to IT, human resources, legal and finance costs incurred in the foreign subsidiaries. (3) For each reportable segment, the other segment expense category includes: • P&I - Shared services costs for IT, human resources, legal and finance support, facilities and equipment-related costs, other professional services and overhead expenses, and operational software licenses. • SET - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • EDU - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • OCG - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, operational software licenses, and facilities and equipment-related costs. • International - Facilities and equipment-related costs, other professional services and overhead expenses, shared services costs for IT, human resources, legal and finance support, and operational software licenses. (4) Represents total company depreciation and amortization of intangibles, including the amortization of hosted software. Fiscal Year Ended January 1, 2023 (In millions of dollars) P&I SET EDU OCG International Inter-Segment Consolidated Revenue from services $ 1,709.9 $ 1,265.4 $ 636.2 $ 468.0 $ 887.0 $ (1.1) $ 4,965.4 Cost of services (1) 1,396.8 968.4 535.9 298.4 755.2 (1.1) 3,953.6 Direct salaries (2) 185.1 141.7 50.8 114.8 85.1 Other segment expenses (3) 108.4 76.3 30.7 39.8 41.4 SG&A expenses 293.5 218.0 81.5 154.6 126.5 — 874.1 Goodwill impairment charge — — — 41.0 — — 41.0 Business unit profit (loss) $ 19.6 $ 79.0 $ 18.8 $ (26.0) $ 5.3 $ — $ 96.7 Corporate SG&A (32.3) Loss on disposal (18.7) Gain on sale of assets 6.2 Depreciation and amortization (4) (37.1) Consolidated earnings from operations 14.8 Loss on investment in Persol Holdings (67.2) Loss on currency translation from liquidation of subsidiary (20.4) Other income (expense), net 1.6 Loss before taxes and equity in net earnings of affiliate $ (71.2) (1) Cost of services are those costs directly associated with the earning of revenue. The primary examples of these types of costs are temporary employee wages, along with other employee related costs, including associated payroll taxes, temporary employee benefits, such as service bonus and holiday pay and health insurance, and workers’ compensation costs. These costs differ fundamentally from SG&A expenses in that they arise specifically from the action of providing our services to customers whereas SG&A costs are incurred regardless of whether or not we place temporary employees with our customers. (2) Direct salaries refers to the compensation expenses for employees directly related to the Company’s operations and service delivery. These expenses include salaries, related payroll taxes, various benefits and performance-based incentives and bonuses for these employees. In the International segment, this includes costs related to IT, human resources, legal and finance costs incurred in the foreign subsidiaries. (3) For each reportable segment, the other segment expense category includes: • P&I - Shared services costs for IT, human resources, legal and finance support, facilities and equipment-related costs, other professional services and overhead expenses, and operational software licenses. • SET - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, and facilities and equipment-related costs. • EDU - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, and facilities and equipment-related costs. • OCG - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • International - Facilities and equipment-related costs, other professional services and overhead expenses, shared services costs for IT, human resources, legal and finance support, and operational software licenses. (4) Represents total company depreciation and amortization of intangibles, including the amortization of hosted software. Depreciation and amortization expense is included in SG&A expenses in our consolidated statements of earnings. Depreciation and amortization expense amounts below include amortization of hosted software, which are excluded in the presentation of depreciation and amortization in our consolidated statements of cash flows. The depreciation and amortization amounts by segment are as follows: 2024 2023 2022 (In millions of dollars) Depreciation and amortization: Professional & Industrial $ 9.5 $ 8.0 $ 7.7 Science, Engineering & Technology 26.1 16.1 15.4 Education 8.3 7.7 6.2 Outsourcing & Consulting 7.6 5.9 4.8 International — 2.4 2.7 A summary of revenue from services by geographic area for 2024, 2023 and 2022 follows: 2024 2023 2022 (In millions of dollars) Revenue from Services: United States $ 3,876.9 $ 3,555.8 $ 3,671.5 Foreign 454.9 1,279.9 1,293.9 Total $ 4,331.8 $ 4,835.7 $ 4,965.4 Foreign revenue is based on the country in which the legal subsidiary is domiciled. No single foreign country’s revenue represented more than 10% of the consolidated revenues of the Company. No single customer represented more than 10% of the consolidated revenues of the Company. A summary of long-lived assets information by geographic area as of year-end 2024 and 2023 follows: 2024 2023 (In millions of dollars) Long-Lived Assets: United States $ 70.1 $ 68.4 Foreign 2.8 21.6 Total $ 72.9 $ 90.0 Long-lived assets represent property and equipment and ROU assets. In 2023 the amount includes $18.4 million of held for sale assets. No single foreign country’s long-lived assets represented more than 10% of the consolidated long-lived assets of the Company.

New Accounting Pronouncements

New Accounting Pronouncements	12 Months Ended
	Dec. 29, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements	24. New Accounting Pronouncements Recently Adopted In November 2023, the FASB issued Accounting Standards Update ("ASU") 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires all public companies to provide more enhanced disclosures for significant segment expenses. This ASU is effective for annual reporting periods beginning after December 15, 2023, including interim reporting periods within those annual periods, with early adoption permitted. We adopted this guidance effective December 29, 2024. See Segment Disclosures footnote for the updated segment disclosures in accordance with this standard, which did not have a material impact to our 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, to require that an acquirer recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606, Revenue from Contracts with Customers. At the acquisition date, an acquirer should account for the related revenue contracts in accordance with Topic 606 as if it had originated the contracts. The amendments in this update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years and should be applied prospectively to business combinations that occur after the effective date. We early adopted this standard in the first quarter of 2022 and the adoption did not have a material impact to our consolidated financial statements. Not Yet Adopted In November 2024, the FASB issued ASU 2024-03, Comprehensive income (Topic 220): Disaggregation of Income Statement Expenses. This ASU requires additional information about certain expense categories in the notes to financial statements. The new guidance will be effective for annual reporting periods beginning after December 15, 2026, with early adoption permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements and related disclosures. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which includes amendments to enhance income tax disclosures primarily through changes to the rate reconciliation and income taxes paid information. This ASU is effective for annual reporting periods beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements and related disclosures. In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative, which modifies several disclosure and presentation requirements in the FASB accounting standard codification to align them with the SEC regulations. The effective date for each amendment will be the date on which the SEC's removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective, with early adoption permitted, by June 30, 2027. For any amendments in which the SEC has not yet removed the applicable requirement from their regulations by June 30, 2027, the pending content of the related amendment in the FASB codification will not be effective. We do not expect this update to have a material impact to our consolidated financial statements. Management has evaluated other recently issued accounting pronouncements and does not believe that any of these pronouncements will have a significant impact on our consolidated financial statements and related disclosures.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 29, 2024
Related Party Transactions [Abstract]
Related Party Transactions	25. Related Party Transactions The Terence E. Adderley Revocable Trust K ("Trust K"), which became irrevocable upon the death of Terence E. Adderley (the former Chairman of the Company's board of directors) on October 9, 2018, controls approximately 95.3% of the outstanding shares of Kelly Class B common stock. There were no material transactions between the Company and Trust K or its trustees in 2024, 2023 or 2022.

Schedule II - Valuation Reserve

Schedule II - Valuation Reserves	12 Months Ended
	Dec. 29, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation Reserves	SCHEDULE II - VALUATION RESERVES (In millions of dollars) Additions Balance at beginning of year Charged to costs and expenses Charged to other accounts Currency exchange effects Deductions from reserves Balance at end of year Description Fiscal year ended December 29, 2024 Reserve deducted in the balance sheet from the assets to which it applies - Deferred tax assets valuation allowance $ 60.5 0.6 (24.4) — (2.5) $ 34.2 Fiscal year ended December 31, 2023 Reserve deducted in the balance sheet from the assets to which it applies - Deferred tax assets valuation allowance $ 34.0 40.9 — 0.6 (15.0) $ 60.5 Fiscal year ended January 1, 2023 Reserve deducted in the balance sheet from the assets to which it applies - Deferred tax assets valuation allowance $ 19.0 15.8 — (0.7) (0.1) $ 34.0

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Pay vs Performance Disclosure
Net earnings (loss)	$ (0.6)	$ 36.4	$ (62.5)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 29, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Dec. 29, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 29, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	Management of material risks from cybersecurity threats for Kelly, Kelly subsidiaries, third-party suppliers and vendors occurs as part of the Company’s Enterprise Risk Management ("ERM") program. The Company’s ERM program provides ongoing risk identification, oversight, guidance, and mitigation on various risks, including cybersecurity. The Company has a Chief Information Security Officer ("CISO") responsible for the evaluation and mitigation of cybersecurity risks in coordination with the Company’s information technology, law, risk and insurance, and enterprise risk and compliance groups. These groups work in tandem on cybersecurity and privacy governance, and oversee the Company’s approach to information security, privacy, data governance, and IT infrastructure, which includes internal monitoring to proactively identify potential security threats, maintenance of access controls, asset management, response and recovery activities, and training and awareness programs. The Company maintains technical and organizational safeguards, including vulnerability assessments, endpoint monitoring, penetration testing, employee training, incident response capability reviews and exercises, cybersecurity insurance and business continuity mechanisms to protect the Company’s assets and operations. In addition to our internal information security team, we rely on services from various third parties, including a Managed Security Service Provider ("MSSP") and services from an IT solutions organization. To evaluate the effectiveness of these internal and external efforts, Kelly adopted the National Institute of Standards and Technology Cybersecurity framework ("NIST CSF") and is assessed against the NIST CSF by a third-party firm at least annually. We use the assessment, reviews and exercises to ensure that the Company’s information security program and processes for managing material cybersecurity risks are responsive to changes in the threat environment. We rely upon multiple information technology systems and networks, some of which are web-based or managed by third parties, to process, transmit, and store electronic information and to manage or support a variety of critical business processes and activities. We actively review the risks associated with all third-party service providers at the inception of our relationship with them and on an ongoing basis as part of our information security program and enterprise risk management third-party risk assessment process. These processes include architecture reviews and contractual clauses related to data protection and compliance, SSAE audits and reviews of vendor System and Organization Controls ("SOC") 1 and SOC 2 Type II reports for critical vendors and ongoing monitoring and reporting of vendor security by independent third parties. Cybersecurity Threats Although we have not experienced a cybersecurity incident that materially affected our results of operations or financial condition, we periodically experience cyberattacks, which may include the use or attempted use of malware, ransomware, computer viruses, phishing, social engineering schemes, and other means of attempted disruption or unauthorized access. Additionally, the rapid pace of change in information security and cybersecurity threats could result in cyberattacks with little or no notice. Our relationships with third parties, including suppliers we manage, customers, and vendors to whom we outsource or rely on for business processes or software, creates potential avenues for malicious actors to initiate a supply chain attack. Even in instances where we are not the direct target of a malicious actor, we could be exposed to risk due to our relationships and business processes with these third parties. Despite security measures, unforeseen exploits create an inherent risk of cyberattacks that could materially affect our operations without notice. An event involving the destruction, modification, accidental or unauthorized release, or theft of sensitive information from systems related to our business, or an attack that results in damage to or unavailability of our key technology systems or those of critical vendors (e.g., ransomware), could result in damage to our reputation, fines, regulatory sanctions or interventions, contractual or financial liabilities, additional compliance and remediation costs, loss of employees or customers, loss of payment card network privileges, operational disruptions and other forms of costs, losses or reimbursements, any of which could materially adversely affect our operations or financial condition. Our cyber security and business continuity plans, and those of our third parties with whom we do business, may not be effective in anticipating, preventing, or effectively responding to all potential cyber risk exposures. Our insurance coverage may not be sufficient to cover all such costs or consequences, and there can be no assurance that any insurance that we now maintain will remain available under acceptable terms.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Management of material risks from cybersecurity threats for Kelly, Kelly subsidiaries, third-party suppliers and vendors occurs as part of the Company’s Enterprise Risk Management ("ERM") program. The Company’s ERM program provides ongoing risk identification, oversight, guidance, and mitigation on various risks, including cybersecurity.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Our board of directors oversees consideration of strategic risks to the Company as well as management’s actions to address and mitigate those risks and delegate oversight of specific risk topics to relevant board committees. The Company’s CISO, Chief Information Officer ("CIO"), Chief Risk and Privacy Officer, General Counsel, Chief Financial Officer ("CFO"), Chief Executive Officer ("CEO"), and other officers review the Company’s cybersecurity metrics on access controls, asset management, response and recovery activities, training and awareness programs, cybersecurity threats and certain incident information quarterly, and on an ad hoc basis when necessary. The Company's Chief Risk and Privacy Officer, CISO, Vice President of Internal Audit and certain members of this management team and select members from their teams convene monthly to manage cybersecurity and privacy governance. The Chief Risk and Privacy Officer holds similar quarterly reviews with the Audit Committee Chair of the Company's Board of Directors, each committee chair, and other directors including the CEO, CFO, and General Counsel. During these reviews, topics include: • implementation and third-party evaluation of the Company’s cybersecurity program, including applicable policies, procedures, governance, and adopted risk management framework; • the impact of cybersecurity and privacy risks on the Company’s services, employees, customers, suppliers, vendors and the staffing industry; and • information on global regulatory changes and best practices.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Company’s CISO, Chief Information Officer ("CIO"), Chief Risk and Privacy Officer, General Counsel, Chief Financial Officer ("CFO"), Chief Executive Officer ("CEO"), and other officers review the Company’s cybersecurity metrics on access controls, asset management, response and recovery activities, training and awareness programs, cybersecurity threats and certain incident information quarterly, and on an ad hoc basis when necessary. The Company's Chief Risk and Privacy Officer, CISO, Vice President of Internal Audit and certain members of this management team and select members from their teams convene monthly to manage cybersecurity and privacy governance. The Chief Risk and Privacy Officer holds similar quarterly reviews with the Audit Committee Chair of the Company's Board of Directors, each committee chair, and other directors including the CEO, CFO, and General Counsel.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Company’s CISO, Chief Information Officer ("CIO"), Chief Risk and Privacy Officer, General Counsel, Chief Financial Officer ("CFO"), Chief Executive Officer ("CEO"), and other officers review the Company’s cybersecurity metrics on access controls, asset management, response and recovery activities, training and awareness programs, cybersecurity threats and certain incident information quarterly, and on an ad hoc basis when necessary. The Company's Chief Risk and Privacy Officer, CISO, Vice President of Internal Audit and certain members of this management team and select members from their teams convene monthly to manage cybersecurity and privacy governance. The Chief Risk and Privacy Officer holds similar quarterly reviews with the Audit Committee Chair of the Company's Board of Directors, each committee chair, and other directors including the CEO, CFO, and General Counsel. During these reviews, topics include: • implementation and third-party evaluation of the Company’s cybersecurity program, including applicable policies, procedures, governance, and adopted risk management framework; • the impact of cybersecurity and privacy risks on the Company’s services, employees, customers, suppliers, vendors and the staffing industry; and • information on global regulatory changes and best practices. In addition to the reports submitted quarterly by the Company’s Chief Risk and Privacy Officer and CISO, the Vice President of Internal Audit independently assesses the Company’s risk management process and separately reports on the effectiveness of the Company’s risk identification, prioritization, and mitigation processes to the Audit Committee. All board members are kept apprised of its committees’ risk oversight activities through reports from the committee chairs presented at regular Board meetings. The Company utilizes a multi-layered approach to prevent and detect cyber threats and has standard operating procedures relating to the identification, incident response and notification and management escalations for security incidents. In line with those procedures, the Company activates an emergency management team ("EMT"), empowered to make decisions, and respond to critical events including cyber incident mitigation and remediation activities. EMT members for information security incidents would include the CISO, CIO, and Chief Risk and Privacy Officer, additional member from the information technology and ERM teams as well as representation from the General Counsel Office, Finance, Communications and Business Operations as appropriate. While active, the EMT provides regular reports to the CEO, General Counsel and other members of the senior leadership team.
Cybersecurity Risk Role of Management [Text Block]	The Company’s CISO, Chief Information Officer ("CIO"), Chief Risk and Privacy Officer, General Counsel, Chief Financial Officer ("CFO"), Chief Executive Officer ("CEO"), and other officers review the Company’s cybersecurity metrics on access controls, asset management, response and recovery activities, training and awareness programs, cybersecurity threats and certain incident information quarterly, and on an ad hoc basis when necessary. The Company's Chief Risk and Privacy Officer, CISO, Vice President of Internal Audit and certain members of this management team and select members from their teams convene monthly to manage cybersecurity and privacy governance. The Chief Risk and Privacy Officer holds similar quarterly reviews with the Audit Committee Chair of the Company's Board of Directors, each committee chair, and other directors including the CEO, CFO, and General Counsel. During these reviews, topics include: • implementation and third-party evaluation of the Company’s cybersecurity program, including applicable policies, procedures, governance, and adopted risk management framework; • the impact of cybersecurity and privacy risks on the Company’s services, employees, customers, suppliers, vendors and the staffing industry; and • information on global regulatory changes and best practices. In addition to the reports submitted quarterly by the Company’s Chief Risk and Privacy Officer and CISO, the Vice President of Internal Audit independently assesses the Company’s risk management process and separately reports on the effectiveness of the Company’s risk identification, prioritization, and mitigation processes to the Audit Committee. All board members are kept apprised of its committees’ risk oversight activities through reports from the committee chairs presented at regular Board meetings. The Company utilizes a multi-layered approach to prevent and detect cyber threats and has standard operating procedures relating to the identification, incident response and notification and management escalations for security incidents. In line with those procedures, the Company activates an emergency management team ("EMT"), empowered to make decisions, and respond to critical events including cyber incident mitigation and remediation activities. EMT members for information security incidents would include the CISO, CIO, and Chief Risk and Privacy Officer, additional member from the information technology and ERM teams as well as representation from the General Counsel Office, Finance, Communications and Business Operations as appropriate. While active, the EMT provides regular reports to the CEO, General Counsel and other members of the senior leadership team.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Company has a Chief Information Security Officer ("CISO") responsible for the evaluation and mitigation of cybersecurity risks in coordination with the Company’s information technology, law, risk and insurance, and enterprise risk and compliance groups.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	Our CISO has over 20 years of experience in information security and security engineering at various technology and staffing companies. The CISO reports directly to the CIO, who has over 30 years of experience serving as Chief Information Officer, Director of IT, and other roles in corporate information technology at staffing and technology companies. In addition, the Company’s Management Team and Cybersecurity and Privacy Governance Team is composed of individuals with collective decades of experience in information technology, data protection, threat response, emergency management, business continuity, and disaster recovery.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	The Company’s CISO, Chief Information Officer ("CIO"), Chief Risk and Privacy Officer, General Counsel, Chief Financial Officer ("CFO"), Chief Executive Officer ("CEO"), and other officers review the Company’s cybersecurity metrics on access controls, asset management, response and recovery activities, training and awareness programs, cybersecurity threats and certain incident information quarterly, and on an ad hoc basis when necessary. The Company's Chief Risk and Privacy Officer, CISO, Vice President of Internal Audit and certain members of this management team and select members from their teams convene monthly to manage cybersecurity and privacy governance. The Chief Risk and Privacy Officer holds similar quarterly reviews with the Audit Committee Chair of the Company's Board of Directors, each committee chair, and other directors including the CEO, CFO, and General Counsel. During these reviews, topics include: • implementation and third-party evaluation of the Company’s cybersecurity program, including applicable policies, procedures, governance, and adopted risk management framework; • the impact of cybersecurity and privacy risks on the Company’s services, employees, customers, suppliers, vendors and the staffing industry; and • information on global regulatory changes and best practices. In addition to the reports submitted quarterly by the Company’s Chief Risk and Privacy Officer and CISO, the Vice President of Internal Audit independently assesses the Company’s risk management process and separately reports on the effectiveness of the Company’s risk identification, prioritization, and mitigation processes to the Audit Committee. All board members are kept apprised of its committees’ risk oversight activities through reports from the committee chairs presented at regular Board meetings. The Company utilizes a multi-layered approach to prevent and detect cyber threats and has standard operating procedures relating to the identification, incident response and notification and management escalations for security incidents. In line with those procedures, the Company activates an emergency management team ("EMT"), empowered to make decisions, and respond to critical events including cyber incident mitigation and remediation activities. EMT members for information security incidents would include the CISO, CIO, and Chief Risk and Privacy Officer, additional member from the information technology and ERM teams as well as representation from the General Counsel Office, Finance, Communications and Business Operations as appropriate. While active, the EMT provides regular reports to the CEO, General Counsel and other members of the senior leadership team.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 29, 2024
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year
Principles of Consolidation	Principles of Consolidation
Investment in Persol Holdings	Investment in Persol Holdings
Investment in PersolKelly Pte. Ltd.	Investment in PersolKelly Pte. Ltd. The Company had a 49% ownership interest in its equity affiliate, PersolKelly Pte. Ltd., which was accounted for under the equity method. The operating results of the equity affiliate were recorded on a one-quarter lag and included in equity in net earnings of affiliate in the consolidated statements of earnings, until the Company sold the majority of the investment in the first quarter of 2022 (see Investment in PersolKelly Pte. Ltd. footnote). The remaining investment is accounted for as an equity investment without a readily determinable fair value (see Fair Value Measurements footnote).
Foreign Currency Translation	Foreign Currency Translation
Foreign Currency Forward Contracts and Interest Rate Swap Contract	Foreign Currency Forward Contracts The Company is exposed to foreign currency fluctuations and enters into foreign currency forward contracts to manage foreign currency risk. Forward contracts may be designated as a fair value hedge, while other forward contracts are not designated as hedging instruments. Both are used to reduce the exposure to variability in certain expected future cash flows. The Company records designated and non-designated derivatives at mark-to-market with gains and losses recognized in earnings according to their designation on the consolidated statements of earnings. See the Fair Value Measurements footnote for further detail on specific forward contracts including each respective line item in which gains and losses are recorded. We are permitted to net the fair values of derivative assets and liabilities for financial reporting purposes, if such assets and liabilities are with the same counterparty and subject to a master netting arrangement. Since these conditions have been met, we elected to employ net presentation of derivative assets and liabilities. Interest Rate Swap Contract The Company is exposed to interest rate fluctuation and enters into interest rate swap contracts that are not designated as hedging instruments to manage fluctuations on our securitization facility due to Secured Overnight Financing Rate ("SOFR") variances (see Fair Value Measurements footnote). The Company records these non-designated derivatives at mark-to-market with gains and losses recognized in other income (expense), net on the consolidated statements of earnings. We are permitted to net the fair values of derivative assets and liabilities for financial reporting purposes, if such assets and liabilities are with the same counterparty and subject to a master netting arrangement. Since these conditions have been met, we elected to employ net presentation of derivative assets and liabilities.
Revenue Recognition	Revenue Recognition Revenues are recognized when control of the promised services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those services. Our revenues are recorded net of any sales, value added, or similar taxes collected from our customers. We generate revenue from: the hourly sales of services by our temporary employees to customers ("staffing services" revenue), the recruiting of permanent employees for our customers ("permanent placement" revenue), and through our talent fulfillment and outcome-based activities ("talent solutions" and "outcome-based services" revenue). We record revenues from sales of services and the related direct costs in accordance with the accounting guidance on reporting revenue gross as a principal versus net as an agent. When Kelly is the principal, we demonstrate control over the service by being primarily responsible to our customers for fulfilling the contractual promise to provide the service. When Kelly does not demonstrate control over the service, which may be evident through the arrangement of other contingent labor suppliers and/or service providers to perform services for the customer or by Kelly not holding primary responsibility for the fulfillment of the contractual promise to provide services to the customer, the amounts billed to our customers are net of the amounts paid to the secondary suppliers/service providers and the net amount is recorded as revenues. Staffing Services Revenue Staffing services contracts are generally negotiated and invoiced on a per-hour or per-unit basis as the temporary staffing services are transferred to the customer. Revenue from the majority of our staffing services continues to be recognized over time as the customer simultaneously receives and consumes the services we provide. We have applied the practical expedient to recognize revenue for these services over the term of the agreement in proportion to the amount we have the right to invoice the customer. Permanent Placement Revenue Permanent placement revenue is recorded at the point in time the permanent placement candidate begins full-time employment. On the candidate start date, the customer accepts the candidate and can direct the use of the candidate as well as obtains the significant risk and rewards of the candidate. We consider this the point the control transfers to the customer. Outcome-Based Services Revenue Billings are generally negotiated and invoiced on a measure of time (hours, weeks, months) or per-unit basis for our services performed. We continue to recognize revenue from the majority of our outcome-based services over time as the customer simultaneously receives and consumes the services we provide. For the majority of our outcome-based services, we have applied the practical expedient to recognize revenue for these services over the term of the agreement in proportion to the amount we have the right to invoice the customer. Talent Solutions Revenue Talent Solutions services include: overall program management of our client’s contingent workforce, external vendors and/or independent contractors, end-to-end talent acquisition, and payroll outsourcing. Billings are generally negotiated and invoiced as a fee-based commission contingent on the amount of services managed through the program, a monthly management fee, measure of time (hours), or a per-unit basis for our services performed. We continue to recognize revenue for talent solution services over time as the customer simultaneously receives and consumes the services we provide. We have applied the practical expedient to recognize revenue for these services over the term of the agreement in proportion to the amount we have the right to invoice the customer. Variable Consideration Certain customers may receive cash-based incentives or credits, which are accounted for as a form of variable consideration. We estimate these amounts based on the expected or likely amount to be provided to customers and reduce revenues recognized to the extent that it is probable that a significant reversal of such adjustment will not occur. Provisions for sales allowances (billing adjustments related to errors, service issues and compromises on billing disputes), based on historical experience, are recognized at the time the related sale is recognized as a reduction in revenue from services. Payment Terms Customer payments are typically due within 60 days of invoicing, but may be shorter or longer depending on contract terms. Management does not assess whether a contract has a significant financing component if the expectation at contract inception is that the period between payment by the customer and the transfer of the services to the customer will be less than one year. We do not have any significant financing components or extended payment terms. Deferred Revenue Items which are billed to the customer at a point in time, rather than billed over time as the services are delivered to the customer, are assessed for potential revenue deferral. At this time, the balance of the contract liability as well as the amount of revenue recognized in the reporting period that was included in the deferred revenue balance at the beginning of the period is not material. Deferred Costs Occasionally, fulfillment costs are incurred after obtaining a contract in order to generate a resource that will be used to provide our services. These costs are considered incremental and recoverable costs to fulfill our contract with the customer. These costs to fulfill a contract are deferred and then amortized on a straight-line basis over a period of benefit that we have determined to be the average length of assignment of the employees. We determined the period of benefit by taking into consideration our customer contracts, attrition rates and other relevant factors. Amortization expense is included in SG&A expenses in the consolidated statements of earnings. Unsatisfied Performance Obligations In accordance with the applicable guidance, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.
Allowance for Credit Losses	Allowance for Credit Losses - Trade Accounts Receivable The Company records an allowance for uncollectible accounts receivable, billed and unbilled, based on historical loss experience, customer payment patterns, current economic trends, and reasonable and supportable forecasts, as applicable. The reserve for sales allowances is also included in the allowance for uncollectible accounts receivable. The Company estimates the current expected credit losses by applying internally developed loss rates to all outstanding receivable balances by aging category. Accounts receivable are written-off against the allowance when they are deemed uncollectible. The Company reviews the adequacy of the allowance for uncollectible accounts receivable on a quarterly basis and, if necessary, increases or decreases the balance by recording a charge or credit to SG&A expenses for the portion of the adjustment relating to uncollectible accounts receivable, and a charge or credit to revenue from services for the portion of the adjustment relating to sales allowances. We are exposed to credit losses primarily through our sales of workforce solution services to customers. We establish an allowance for estimated credit losses in the current period resulting from the failure of our customers to make required payments on their trade accounts receivable in future periods. We pool such assets by geography and other similar risk characteristics, such as accounts in collection, and apply an aging method to estimate future credit losses utilizing inputs such as historical write-off experience, customer payment patterns, current collection data, and reasonable and supportable forecasts, as applicable. Credit risk with respect to accounts receivable is limited due to short payment terms. The Company also performs ongoing credit evaluations using applicable credit ratings of its customers to help analyze credit risk. We monitor ongoing credit exposure thr ough frequent review of past due accounts (based on the payment terms of the contract) and follow-up with customers, as appropriate. We may employ collection agencies and legal counsel to pursue recovery of defaulted receivables. Allowance for Credit Losses - Other Financial Assets The Company measures expected credit losses on qualified financial assets that do not result from revenue transactions using a probability of default method by type of financing receivable. The estimate of expected credit losses considers credit ratings, financial data, historical write-off experience, current conditions, and reasonable and supportable forecasts, as applicable, to estimate the risk of loss.
Cost of Services	Cost of Services
Advertising Expenses	Advertising Expenses Advertising expenses, which are expensed as incurred and are included in SG&A expenses, were $9.6 million in 2024, $7.8 million in 2023 and $6.4 million in 2022.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Estimates are used for, but not limited to, the accounting for the allowance for uncollectible accounts receivable and credit losses, workers’ compensation, goodwill and long-lived asset impairment, valuation of acquired intangibles, litigation costs and income taxes. Actual results could differ materially from those estimates.
Cash and Equivalents	Cash and Equivalents
Property and Equipment	Property and Equipment Property and equipment are stated at cost and are depreciated on a straight-line basis over their estimated useful lives. Cost and estimated useful lives of property and equipment by function are as follows (in millions of dollars): Category 2024 2023 Useful Life Land $ — $ — — Work in process 2.3 6.7 — Buildings and improvements 0.4 0.4 30 years Computer hardware and software 119.9 123.1 3 to 12 years Equipment, furniture and fixtures 10.9 22.6 5 years Leasehold improvements 6.5 13.1 HQ: 15 years Branches: Lesser of the lease or 5 years Total property and equipment $ 140.0 $ 165.9
Cloud Computing Arrangements	Cloud Computing Arrangements
Leases	Leases Right-of-use ("ROU") assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. Since most of the Company’s leases do not have an implicit borrowing rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. Our leases may include options allowing us in our sole discretion to extend or terminate the lease, and when it is reasonably certain that we will exercise those options, we will include those periods in our lease term. Variable costs, such as payments for insurance and tax payments, are expensed when the obligation for those payments is incurred.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the acquisition date fair value of net assets acquired. Purchased intangible assets are primarily comprised of acquired trade names and customer relationships that are recorded at fair value at the date of acquisition. The fair value of trade name intangibles is determined using the relief-from-royalty method, which relies on the use of estimates and assumptions about expected future revenue growth rates, royalty rates and discount rates. The fair value of customer relationship intangibles is determined using the multi-period excess earnings method, which relies on the use of estimates and assumptions about expected future revenue growth rates, customer attrition rates, profit margins and discount rates. Purchased intangible assets with definite lives are amortized over their respective useful lives (from 5 to 15 years) on a straight-line basis.
Impairment of Long-Lived Assets, Intangible Assets, Equity Method Investments and Equity Securities	Impairment of Long-Lived Assets, Intangible Assets, Goodwill, Equity Method Investments and Equity Securities The Company evaluates long-lived assets and intangible assets with definite lives for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. When estimated undiscounted future cash flows will not be sufficient to recover the carrying amount of the asset group, in which the long-lived asset being tested for impairment resides, the asset is written down to its estimated fair value. Assets to be disposed of by sale, if any, are reported at the lower of the carrying amount or estimated fair value less cost to sell. We test goodwill for impairment annually and whenever events or circumstances make it more likely than not that an impairment may have occurred. Generally accepted accounting principles require that goodwill be tested for impairment at a reporting unit level. For segments with a goodwill balance, we have determined that our reporting units are the same as our operating and reportable segments based on our organizational structure or one level below our operating segments (the component level). We may first use a qualitative assessment ("step zero") for the annual impairment test if we have determined that it is more likely than not that the fair value for one or more reporting units is greater than their carrying value. The step zero analysis includes making judgments and assessments to determine whether any events or circumstances have occurred that makes it more likely than not that the fair value of a reporting unit is less than its carrying amount. In conducting the qualitative assessment, we assess the totality of relevant events and circumstances that affect the fair value or carrying value of the reporting unit. Such events and circumstances may include macroeconomic conditions, industry and market conditions, cost factors, overall financial performance, entity-specific events and events affecting a reporting unit. If we elect to forgo the qualitative assessment for a reporting unit, goodwill is tested for impairment by comparing the estimated fair value of a reporting unit to its carrying value ("step one"). If the estimated fair value of a reporting unit exceeds the carrying value of the net assets assigned to a reporting unit, goodwill is not considered impaired and no further testing is required. If the carrying value of the net assets assigned to a reporting unit exceeds the estimated fair value of a reporting unit, goodwill is deemed impaired and is written down to the extent of the difference. For the step one quantitative test, we determine the fair value of our reporting units using the income approach. Under the income approach, estimated fair value is determined based on estimated future cash flows discounted by an estimated market participant weighted-average cost of capital, which reflects the overall level of inherent risk of the reporting unit being measured. Estimated future cash flows are based on our internal projection model and reflects management’s outlook for the reporting unit. Assumptions and estimates about future cash flows and discount rates are complex and often subjective. They can be affected by a variety of factors, including external factors such as industry and economic trends, and internal factors such as changes in our business strategy and our internal forecasts. Our analysis used the following significant assumptions: expected future revenue growth rates, profit margins and discount rates. Prior to the sale of the majority of our investment in our equity affiliate, we evaluated our equity method investment on a quarterly basis or whenever events or circumstances indicated the carrying amount may be other-than-temporarily impaired. If we had concluded that there was an other-than-temporary impairment of our equity method investment, we would have adjusted our carrying amount of our investment to the adjusted fair value. We evaluate our equity securities measured under the measurement alternative for indicators of impairment on a quarterly basis and whenever observable price changes occur. The measurement alternative represents cost, less impairment, plus or minus observable price changes. Quarterly, we also confirm the securities still qualify to be measured in accordance with the measurement alternative. The value of the securities will be adjusted for any increases or decreases as a result of an observable price change.
Accounts Payable	Accounts Payable
Accrued Payroll and Related Taxes	Accrued Payroll and Related Taxes
Income Taxes	Income Taxes The Company accounts for income taxes using the liability method. Under this method, deferred tax assets and liabilities are recognized for the expected tax consequences of temporary differences between the tax bases of assets and liabilities and their reported amounts. Valuation allowances are provided against deferred tax assets when it is more likely than not that some portion or all of the deferred tax asset will not be realized. The U.S. work opportunity credit is allowed for wages earned by employees in certain targeted groups. The actual amount of creditable wages in a particular period is estimated, since the credit is only available once an employee reaches a minimum employment period and the employee’s inclusion in a targeted group is certified by the applicable state. As these events often occur after the period the wages are earned, judgment is required in determining the amount of work opportunity credits accrued for in each period. We evaluate the accrual regularly throughout the year and make adjustments as needed. Uncertain tax positions that are taken or expected to be taken in a tax return are recognized in the financial statements when it is more likely than not (i.e., a likelihood of more than fifty percent) that the position would be sustained upon examination by tax authorities that have full knowledge of all relevant information. A recognized tax position is then measured at the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Interest and penalties related to income taxes are classified as income tax expense. U.S. taxes on global intangible low-taxed income ("GILTI") are accounted for as incurred.
Stock-Based Compensation	Stock-Based Compensation
Earnings Per Share	Earnings Per Share Restricted stock that entitle their holders to receive nonforfeitable dividends before vesting are considered participating securities and, therefore, are included in the calculation of earnings per share using the two-class method. The two-class method is an earnings allocation formula that determines earnings per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Under this method, earnings from continuing operations (or net earnings) is reduced by the amount of dividends declared, and the remaining undistributed earnings is allocated to common stock and participating securities based on the proportion of each class’s weighted average shares outstanding to the total weighted average shares outstanding. The calculation of diluted earnings per share includes the effect of potential common shares outstanding in the average weighted shares outstanding.
Workers' Compensation	Workers’ Compensation In the U.S., the Company has a combination of insurance and self-insurance contracts under which we effectively bear the first $1.0 million of risk per single accident. The Company establishes accruals for workers’ compensation claims utilizing actuarial methods to estimate the undiscounted future cash payments that will be made to satisfy the claims, including an allowance for incurred-but-not-reported claims. The Company retains an independent consulting actuary to establish loss development factors and loss rates, based on historical claims experience as well as industry experience, and applies those factors to current claims information to derive an estimate of the ultimate claims liability. In preparing the estimates, the consulting actuary considers a number of assumptions and multiple generally accepted actuarial methods in the course of preparing the loss forecast for claims. When claims exceed the applicable loss limit or self-insured retention and realization of recovery of the claim from existing insurance policies is deemed probable, the Company records a receivable from the insurance company for the excess amount. The receivable is included in prepaid expenses and other current assets and other assets in the consolidated balance sheet at year end. The Company evaluates the accrual quarterly throughout the year and makes adjustments as needed, and the ultimate cost of these claims may be greater than or less than the established accrual.
Segment Disclosures	The Company’s operating segments, which also represent its reportable segments, are based on the organizational structure for which financial results are regularly evaluated by the Company’s chief operating decision-maker ("CODM", the Company’s CEO) to determine resource allocation and assess performance. The Company’s four reportable segments in 2024, (1) Professional & Industrial (P&I), (2) Science, Engineering & Technology (SET), (3) Education (EDU), and (4) Outsourcing & Consulting (OCG), reflect the specialty services the Company provides to customers and represent how the business is organized internally. Prior to 2024, the Company also had an International operating segment. Beginning in the first quarter of 2024, the Company's organizational structure no longer includes the International segment following the sale of the EMEA staffing operations in January 2024. Our Mexico operations, which were previously in our International segment, are now included in the Professional & Industrial segment. Professional & Industrial segment information for the prior years has been recast to conform to the new structure. Intersegment revenue represents revenue earned between the reportable segments and is eliminated from total segment revenue from services. P&I delivers staffing, outcome-based and permanent placement services, providing administrative, accounting and finance, light industrial and contact center staffing and other workforce solutions in the U.S. and Canada, including our KellyConnect and Skilled Professional Solutions products. SET provides highly specialized skills to a variety of industries through staffing, outcome-based, talent solutions, and permanent placement services. SET is focused on science and clinical research, engineering, technology and telecommunications specialties predominantly in the U.S. and Canada and includes MRP, Softworld, NextGen and Global Technology Associates ("GTA") brands. EDU delivers high quality education and therapy services talent through staffing, permanent placement and executive search services to Pre-K-12 school districts and education organizations across the U.S. and includes Teachers On Call, Greenwood/Asher and PTS brands. OCG provides global talent supply chain and workforce solutions, including MSP, RPO, PPO and executive coaching programs to customers on a global basis and includes our RocketPower brand. The Company utilizes a shared services approach for certain enterprise functions including IT, human resources, legal and finance support in the US and Canada. Expenses incurred to directly support the operating units have been allocated to Professional & Industrial, Science, Engineering & Technology, Education, Outsourcing & Consulting and International based on work effort, volume or, in the absence of a readily available measurement process, proportionately based on gross profit realized. Certain expenses related to incentive compensation, law and risk management, certain finance and accounting functions, executive management and corporate campus facilities do not directly benefit a specific operating segment and are not included in the segment results. These costs, as well as costs related to acquisition integration and transformation activities and disposition transition expenses, are included in Corporate expenses in the following tables. In addition to the change in our segment structure in the first quarter of 2024, we reassessed the allocation of corporate expenses to the operating segments and allocated additional costs which are attributable to the business from corporate. In the first quarter of 2024, the Company changed the segment profitability measure from earnings from operations to a business unit profit measure that excludes depreciation and amortization. This change provides management with greater visibility into the financial performance of the segments and how they contribute to the Company's overall performance. The CODM leverages the business unit profit measure during the annual budgeting and forecasting processes, as well as to assess segment profitability, guide resource allocation, and evaluate the alignment of compensation plans with strategic goals. The following tables present information about the reported revenue from services of the Company by reportable segment, along with a reconciliation to earnings (loss) before taxes and equity in net earnings of affiliate, for 2024, 2023 and 2022. Asset information by reportable segment is not presented, since the Company does not produce such information internally nor does it use such information to manage its business.
New Accounting Pronouncements	Recently Adopted In November 2023, the FASB issued Accounting Standards Update ("ASU") 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires all public companies to provide more enhanced disclosures for significant segment expenses. This ASU is effective for annual reporting periods beginning after December 15, 2023, including interim reporting periods within those annual periods, with early adoption permitted. We adopted this guidance effective December 29, 2024. See Segment Disclosures footnote for the updated segment disclosures in accordance with this standard, which did not have a material impact to our 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, to require that an acquirer recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606, Revenue from Contracts with Customers. At the acquisition date, an acquirer should account for the related revenue contracts in accordance with Topic 606 as if it had originated the contracts. The amendments in this update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years and should be applied prospectively to business combinations that occur after the effective date. We early adopted this standard in the first quarter of 2022 and the adoption did not have a material impact to our consolidated financial statements. Not Yet Adopted In November 2024, the FASB issued ASU 2024-03, Comprehensive income (Topic 220): Disaggregation of Income Statement Expenses. This ASU requires additional information about certain expense categories in the notes to financial statements. The new guidance will be effective for annual reporting periods beginning after December 15, 2026, with early adoption permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements and related disclosures. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which includes amendments to enhance income tax disclosures primarily through changes to the rate reconciliation and income taxes paid information. This ASU is effective for annual reporting periods beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements and related disclosures. In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative, which modifies several disclosure and presentation requirements in the FASB accounting standard codification to align them with the SEC regulations. The effective date for each amendment will be the date on which the SEC's removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective, with early adoption permitted, by June 30, 2027. For any amendments in which the SEC has not yet removed the applicable requirement from their regulations by June 30, 2027, the pending content of the related amendment in the FASB codification will not be effective. We do not expect this update to have a material impact to our consolidated financial statements. Management has evaluated other recently issued accounting pronouncements and does not believe that any of these pronouncements will have a significant impact on our consolidated financial statements and related disclosures.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 29, 2024
Accounting Policies [Abstract]
Property and Equipment at Cost and Depreciable Useful Lives	Cost and estimated useful lives of property and equipment by function are as follows (in millions of dollars): Category 2024 2023 Useful Life Land $ — $ — — Work in process 2.3 6.7 — Buildings and improvements 0.4 0.4 30 years Computer hardware and software 119.9 123.1 3 to 12 years Equipment, furniture and fixtures 10.9 22.6 5 years Leasehold improvements 6.5 13.1 HQ: 15 years Branches: Lesser of the lease or 5 years Total property and equipment $ 140.0 $ 165.9

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 29, 2024
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table presents our segment revenues disaggregated by service type (in millions of dollars): December Year to Date 2024 2023 2022 Professional & Industrial Staffing services $ 956.9 $ 1,014.2 $ 1,229.5 Permanent placement 9.7 14.0 30.3 Outcome-based services 504.1 511.3 450.1 Total Professional & Industrial 1,470.7 1,539.5 1,709.9 Science, Engineering & Technology Staffing services 945.3 792.7 869.0 Permanent placement 29.5 17.8 29.7 Outcome-based services 421.5 380.3 366.7 Talent solutions 26.5 — — Total Science, Engineering & Technology 1,422.8 1,190.8 1,265.4 Education Staffing services 966.0 834.9 627.8 Permanent placement 6.3 7.0 8.4 Total Education 972.3 841.9 636.2 Outsourcing & Consulting Talent solutions 468.3 454.7 468.0 Total Outsourcing & Consulting 468.3 454.7 468.0 International Staffing services — 790.0 851.4 Permanent placement — 20.7 21.2 Talent solutions — 1.4 14.4 Total International — 812.1 887.0 Total Intersegment (2.3) (3.3) (1.1) Total Revenue from Services $ 4,331.8 $ 4,835.7 $ 4,965.4 The below table presents our revenues disaggregated by geography (in millions of dollars): December Year to Date 2024 2023 2022 Americas United States $ 3,876.9 $ 3,555.8 $ 3,671.5 Canada 188.6 189.8 168.2 Puerto Rico 108.0 107.0 112.4 Mexico 60.7 75.7 46.5 Total Americas Region 4,234.2 3,928.3 3,998.6 Europe Switzerland 4.0 224.2 222.8 France 0.4 194.4 199.4 Portugal — 189.4 169.5 Italy — 63.9 69.3 Russia — — 63.4 Other 37.5 191.8 200.3 Total Europe Region 41.9 863.7 924.7 Total Asia-Pacific Region 55.7 43.7 42.1 Total Kelly Services, Inc. $ 4,331.8 $ 4,835.7 $ 4,965.4 The below table presents revenue from our SET, OCG and former International segment, which previously included our Mexico operations, disaggregated by geographic region (in millions of dollars): December Year to Date 2024 2023 2022 Science, Engineering & Technology Americas $ 1,412.1 $ 1,175.2 $ 1,250.3 Europe 10.7 15.6 15.1 Total Science, Engineering & Technology $ 1,422.8 $ 1,190.8 $ 1,265.4 Outsourcing & Consulting Americas $ 381.4 $ 375.0 $ 403.3 Europe 31.2 36.0 22.6 Asia-Pacific 55.7 43.7 42.1 Total Outsourcing & Consulting $ 468.3 $ 454.7 $ 468.0 International Europe $ — $ 812.1 $ 887.0 Total International $ — $ 812.1 $ 887.0

Credit Losses (Tables)

Credit Losses (Tables)	12 Months Ended
	Dec. 29, 2024
Credit Loss [Abstract]
Accounts Receivable, Allowance for Credit Loss	The rollforward of our allowance for credit losses related to trade accounts receivable, which is recorded in trade accounts receivable, less allowance in the consolidated balance sheet, is as follows (in millions of dollars): December Year to Date 2024 2023 2022 Allowance for credit losses: Beginning balance $ 8.0 $ 7.7 $ 9.4 Current period provision 0.6 2.1 1.3 Currency exchange effects (0.3) 0.3 (0.2) Disposition of EMEA staffing operations (2.4) — — Write-offs (1.0) (2.1) (2.8) Ending balance $ 4.9 $ 8.0 $ 7.7

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	12 Months Ended
	Dec. 29, 2024
Business Combinations [Abstract]
Business Combination, Schedule of Purchase Price	The total consideration is as follows (in millions of dollars): Cash consideration paid $ 425.0 Estimated cash acquired 13.6 Estimated net working capital adjustment 1.4 Total cash consideration 440.0 Additional consideration payable 3.4 Net working capital adjustment 1.4 Total consideration $ 444.8
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed as of the date of the acquisition (in millions of dollars): Cash and equivalents $ 12.6 Trade accounts receivable 89.1 Prepaid expenses and other current assets 8.5 Net property and equipment 3.1 Operating lease right-of-use assets 11.9 Goodwill 222.9 Intangibles, net 145.9 Other assets, noncurrent 10.6 Accounts payable and accrued liabilities, current (12.1) Operating lease liabilities, current (4.0) Accrued payroll and related taxes, current (15.9) Income and other taxes, current (0.5) Operating lease liabilities, noncurrent (9.0) Other long-term liabilities (18.3) Total consideration, including working capital adjustments $ 444.8
Business Acquisition, Pro Forma Information	The following unaudited pro forma information presents a summary of the operating results as if the MRP acquisition had been completed as of January 2, 2023 (in millions of dollars): 2024 2023 Pro forma revenues $ 4,552.2 $ 5,389.8 Pro forma net earnings (loss) $ (4.9) $ 30.8
Disposal Groups, Including Discontinued Operations	The major classes of divested assets and liabilities were as follows (in millions of dollars): Assets divested Cash and equivalents $ 33.5 Trade accounts receivable, net 202.8 Prepaid expenses and other current assets 29.0 Property and equipment, net 4.2 Operating lease right-of-use assets 14.2 Deferred taxes 4.1 Other assets 5.4 Assets divested 293.2 Liabilities divested Accounts payable and accrued liabilities (24.5) Operating lease liabilities, current (5.7) Accrued payroll and related taxes (91.6) Income and other taxes (32.9) Operating lease liabilities, noncurrent (8.9) Accrued retirement benefits (1.7) Other long-term liabilities (4.6) Liabilities divested (169.9) Disposal group, net $ 123.3

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 29, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements on a Recurring Basis	The following tables present assets and liabilities measured at fair value on a recurring basis as of year-end 2024 and 2023 in the consolidated balance sheet by fair value hierarchy level, as described below. Level 1 measurements consist of unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 measurements include quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the asset or liability. Level 3 measurements include significant unobservable inputs. There were no transfers between Level 1, Level 2 and Level 3 assets or liabilities in 2024 or 2023. As of Year-End 2024 Description Total Level 1 Level 2 Level 3 (In millions of dollars) Money market funds $ 6.4 $ 6.4 $ — $ — Total assets at fair value $ 6.4 $ 6.4 $ — $ — Interest rate swaps $ (0.4) $ — $ (0.4) $ — EMEA staffing indemnification (2.0) — — (2.0) Brazil indemnification (1.7) — — (1.7) Total liabilities at fair value $ (4.1) $ — $ (0.4) $ (3.7) As of Year-End 2023 Description Total Level 1 Level 2 Level 3 (In millions of dollars) Money market funds $ 42.5 $ 42.5 $ — $ — Total assets at fair value $ 42.5 $ 42.5 $ — $ — Brazil indemnification $ (3.0) $ — $ — $ (3.0) Foreign currency forward contract, net (3.6) — (3.6) — Total liabilities at fair value $ (6.6) $ — $ (3.6) $ (3.0)

Restructuring and Transformat_2

Restructuring and Transformation Activities (Tables)	12 Months Ended
	Dec. 29, 2024
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	The restructuring and transformation costs included in SG&A are detailed below for December year-to-date 2024 (in millions of dollars): Severance Transformation Costs Total Professional & Industrial $ 0.3 $ — $ 0.3 Science, Engineering & Technology 0.3 — 0.3 Outsourcing & Consulting 0.4 — 0.4 Corporate 2.0 3.1 5.1 Total $ 3.0 $ 3.1 $ 6.1 The restructuring and transformation costs incurred in 2023 and included in SG&A are detailed below (in millions of dollars): Severance Costs Lease Termination Costs, Transformation and Other Total Professional & Industrial $ 6.0 $ 0.7 $ 6.7 Science, Engineering & Technology 1.3 0.3 1.6 Education 1.0 — 1.0 Outsourcing & Consulting 3.0 — 3.0 International 3.3 — 3.3 Corporate 4.7 18.3 23.0 Total $ 19.3 $ 19.3 $ 38.6 2022 Actions In the first quarter of 2022, the Company took restructuring actions designed to increase efficiency. Restructuring costs Severance Costs Lease Termination Costs Total Professional & Industrial $ 0.1 $ 0.2 $ 0.3 Education 0.4 — 0.4 Outsourcing & Consulting 0.2 — 0.2 Corporate 0.8 — 0.8 Total $ 1.5 $ 0.2 $ 1.7
Summary of Restructuring Reserve	Accrual Summary A summary of our global restructuring balance sheet accrual, included in accrued payroll and related taxes and accounts payable and accrued liabilities in the consolidated balance sheet, is detailed below (in millions of dollars): Balance as of year-end 2022 $ 0.3 Accruals 40.6 Reductions for cash payments (23.8) Accrual adjustments (2.0) Balance as of year-end 2023 15.1 Accruals 6.6 Reductions for cash payments (19.4) Disposition of EMEA staffing operations (1.5) Accrual adjustments (0.5) Balance as of year-end 2024 $ 0.3

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 29, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the Net Carrying Amount of Goodwill	The changes in the carrying amount of goodwill for the fiscal years 2024 and 2023 are included in the table below (in millions of dollars): Science, Engineering & Technology Education Total Balance as of year-end 2022 $ 111.3 $ 39.8 $ 151.1 Additions — — — Impairment adjustments — — — Balance as of year-end 2023 111.3 39.8 151.1 Additions 222.9 3.0 225.9 Impairment adjustments (72.8) — (72.8) Balance as of year-end 2024 $ 261.4 $ 42.8 $ 304.2
Schedule of Finite-Lived Intangible Assets	Intangible assets, excluding fully-amortized intangibles, are included within other assets on our consolidated balance sheet and consist of the following (in millions of dollars): 2024 2023 Useful Lives Gross Carrying Amount Less: Accumulated Amortization Net Gross Carrying Amount Less: Accumulated Amortization Net Customer relationships 10-15 years $ 229.2 $ 65.9 $ 163.3 $ 141.1 $ 47.7 $ 93.4 Trade names 10-15 years 108.1 20.4 87.7 51.6 12.8 38.8 Non-compete agreements 5 years 5.6 2.7 2.9 4.3 1.7 2.6 Trademarks 10 years 4.8 2.4 2.4 4.8 1.9 2.9 Total $ 347.7 $ 91.4 $ 256.3 $ 201.8 $ 64.1 $ 137.7

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 29, 2024
Other Assets [Abstract]
Schedule of Other Assets	Included in other assets are the following (in millions of dollars): 2024 2023 Long-term hosted software, net of accumulated amortization of $23.5 million in 2024 and $14.2 million in 2023 (1) $ 17.9 $ 13.1 Noncurrent restricted cash 6.4 8.0 Workers' compensation and other claims receivable (2) 4.9 11.7 Equity securities (3) 11.0 7.9 Other 5.1 7.8 Total other assets (4) $ 45.3 $ 48.5 (1) Long-term hosted software represents cloud computing arrangements that are comprised of internal-use software platforms that are accounted for as service contracts (see Summary of Significant Accounting Policies footnote). (2) Workers’ compensation and other claims receivable represents receivables from the insurance company for U.S. workers’ compensation and automobile liability claims in excess of the applicable loss limits. (3) Equity securities includes $6.4 million related to our equity investment in the JV (see Investment in PersolKelly Pte. Ltd footnote). (4) Total other assets in 2023 includes $5.4 million of assets held for sale in connection with the sale of our EMEA staffing operations (see Acquisitions and Dispositions footnote).

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 29, 2024
Leases [Abstract]
Components of lease expense	The components of lease expense are as follows (in millions of dollars): December Year to Date Description Statements of Earnings Location 2024 2023 2022 Operating: Operating lease cost Selling, general and administrative expenses $ 14.6 $ 21.0 $ 22.8 Short-term lease cost Selling, general and administrative expenses 0.6 2.0 2.4 Variable lease cost Selling, general and administrative expenses 3.5 6.1 5.2 Financing: Amortization of ROU assets Selling, general and administrative expenses 0.3 0.6 0.6 Interest on lease liabilities Other income (expense), net — — 0.1 Total lease cost $ 19.0 $ 29.7 $ 31.1
Supplemental consolidated balance sheet information related to leases	Supplemental consolidated balance sheet information related to leases is as follows (in millions of dollars): Description Balance Sheet Location As of Year-End 2024 As of Year-End 2023 ROU Assets: Operating Operating lease right-of-use assets $ 47.0 (1) $ 61.3 (2) Financing Net property and equipment — 0.3 Total lease assets $ 47.0 $ 61.6 ROU Liabilities: Operating - current Operating lease liabilities, current $ 12.3 $ 14.0 (2) Operating - noncurrent Operating lease liabilities, noncurrent 50.9 51.9 (2) Total lease liabilities $ 63.2 $ 65.9 (1) ROU operating assets reflect an impairment charge of $12.1 million, related to our leased headquarters facility reflecting adjustments as to how we are utilizing the building as a part of our ongoing transformation efforts. The impairment charges related to the ROU assets are recorded in the asset impairment charge in the consolidated statements of earnings (see Restructuring and Transformation Activities footnote). (2) ROU operating assets and liabilities, current and non-current, include held for sale leases (see Acquisitions and Dispositions footnote).
Schedule of lease terms and discount rates	Weighted average remaining lease terms and discount rates for operating leases are as follows: December Year to Date 2024 2023 Weighted average remaining lease term (years): 7.0 7.3 Weighted average discount rate: 5.8 % 5.4 %
Other information related to leases	Other information related to leases is as follows (in millions of dollars): December Year to Date 2024 2023 2022 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 15.0 $ 20.6 $ 22.4 Financing cash flows from financing leases — 1.2 1.4 ROU assets obtained in exchange for new lease obligations: Operating leases $ 10.4 $ 12.6 $ 10.7
Maturities of operating lease liabilities under ASC 842	Maturities of lease liabilities as of year-end 2024 are as follows (in millions of dollars): Operating Leases 2025 $ 15.5 2026 13.0 2027 9.5 2028 7.7 2029 6.9 Thereafter 23.5 Total future lease payments 76.1 Less: Imputed interest 12.9 Total $ 63.2

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 29, 2024
Stockholders' Equity Note [Abstract]
Changes in Accumulated Other Comprehensive Income by Component, Net of Tax	The changes in accumulated other comprehensive income (loss) by component, net of tax, during 2024, 2023 and 2022 are included in the table below (in millions of dollars). Amounts in parentheses indicate debits. 2024 2023 2022 Foreign currency translation adjustments: Beginning balance $ 0.6 $ (7.4) $ (25.0) Other comprehensive income (loss) before classifications (6.9) 8.0 (7.5) Amounts reclassified from accumulated other comprehensive income (loss) - liquidation of Japan subsidiary — — 20.4 (1) Amounts reclassified from accumulated other comprehensive income (loss) - equity method investment and other (0.6) — 4.7 (2) Net current-period other comprehensive income (loss) (7.5) 8.0 17.6 Ending balance (6.9) 0.6 (7.4) Pension liability adjustments: Beginning balance (0.4) (1.1) (2.7) Other comprehensive income (loss) before classifications — 0.6 1.5 Amounts reclassified from accumulated other comprehensive income 0.4 (3) 0.1 (3) 0.1 (3) Net current-period other comprehensive income (loss) 0.4 0.7 1.6 Ending balance — (0.4) (1.1) Total accumulated other comprehensive income (loss) $ (6.9) $ 0.2 $ (8.5) (1) Amount was recorded in the loss on currency translation from liquidation of subsidiary in the consolidated statements of earnings. (2) Of the amount included in this line item $1.9 million in 2022 was recorded in the other income (expense), net line item in the consolidated statements of earnings related to the investment in PersolKelly Pte. Ltd. (see Investment in PersolKelly Pte. Ltd. footnote for more details). In addition, $1.4 million in 2022 was recorded in the other income (expense), net line item in the consolidated statements of earnings related to other activities and $1.4 million in 2022 was recorded in loss on disposal line item in the consolidated statements of earnings related to the liquidation of the cumulative translation adjustment for the sale of our Russia operations (see Acquisitions and Dispositions footnote for more details). All amounts in prior years were recorded in other income (expense), net in the consolidated statements of earnings. (3) Amount was recorded in SG&A expenses in the consolidated statements of earnings.

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	12 Months Ended
	Dec. 29, 2024
Earnings Per Share [Abstract]
Common Stock Reconciliation of Basic and Diluted Earnings Per Share	The reconciliation of basic earnings (loss) per share on common stock for 2024, 2023 and 2022 follows (in millions of dollars except per share data): 2024 2023 2022 Net earnings (loss) $ (0.6) $ 36.4 $ (62.5) Less: Earnings allocated to participating securities — (0.7) — Net earnings (loss) available to common shareholders $ (0.6) $ 35.7 $ (62.5) Average common shares outstanding (millions): Basic 35.5 35.9 38.1 Dilutive share awards — 0.4 — Diluted 35.5 36.3 38.1 Basic earnings (loss) per share $ (0.02) $ 0.99 $ (1.64) Diluted earnings (loss) per share $ (0.02) $ 0.98 $ (1.64)

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 29, 2024
Share-Based Payment Arrangement [Abstract]
Summary of Status of Nonvested Restricted Stock Awards and Units	A summary of the status of nonvested restricted stock as of year-end 2024 and changes during this period is presented as follows below (in thousands of shares except per share data): Restricted Stock Weighted Average Grant Date Fair Value Nonvested at year-end 2023 784 $ 18.52 Granted 651 20.70 Vested (297) 18.62 Forfeited (77) 19.07 Nonvested at year-end 2024 1,061 $ 19.79
Summary of Status of Nonvested Performance Share Awards	A summary of the status of nonvested performance shares at target as of year-end 2024 and changes during this period is presented as follows below (in thousands of shares except per share data). The vesting adjustment in the table below represents 2021 performance shares that did not vest because actual achievement was below the threshold level or was not achieved, and resulted in no payout. Performance Shares Shares Weighted Average Grant Date Fair Value Nonvested at year-end 2023 674 $ 17.49 Granted 170 19.96 Vested (136) 18.88 Forfeited (33) 17.99 Vesting Adjustment (107) 16.52 Nonvested at year-end 2024 568 $ 18.66

Other Income (Expense), Net (Ta

Other Income (Expense), Net (Tables)	12 Months Ended
	Dec. 29, 2024
Other Income and Expenses [Abstract]
Other Income (Expense), Net	Included in other income (expense), net are the following (in millions of dollars): 2024 2023 2022 Interest income $ 6.8 $ 6.7 $ 2.3 Interest expense (10.9) (3.2) (2.1) Foreign exchange gains (losses) 0.5 (1.5) 4.8 Other (3.2) (1.4) (3.4) Other income (expense), net $ (6.8) $ 0.6 $ 1.6

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 29, 2024
Income Tax Disclosure [Abstract]
Earnings (Loss) From Continuing Operations Before Taxes Per Jurisdiction	Earnings (loss) before taxes and equity in net earnings of affiliate for the years 2024, 2023 and 2022 were taxed under the following jurisdictions (in millions of dollars): 2024 2023 2022 Domestic $ (33.2) $ 29.9 $ (39.4) Foreign 11.3 (5.0) (31.8) Total $ (21.9) $ 24.9 $ (71.2)
Provision for Income Taxes From Continuing Operations	The provision for income taxes was as follows (in millions of dollars): 2024 2023 2022 Current tax expense: U.S. federal $ (0.7) $ 1.0 $ 1.3 U.S. state and local (0.8) 2.5 1.4 Foreign 8.0 9.9 61.5 Total current 6.5 13.4 64.2 Deferred tax (benefit) expense: U.S. federal (24.9) (36.8) (2.5) U.S. state and local (2.6) (3.6) 0.7 Foreign (0.3) 15.5 (70.3) Total deferred (27.8) (24.9) (72.1) Total provision $ (21.3) $ (11.5) $ (7.9)
Deferred Taxes	The deferred tax assets and liabilities are comprised of the following (in millions of dollars): 2024 2023 Fixed assets and right-of-use assets $ (15.2) $ (19.0) Intangible assets and goodwill 0.1 19.0 Employee compensation and benefit plans 77.0 71.5 Outside basis difference on held for sale assets — 34.7 Operating lease liabilities 17.7 18.3 Net operating loss carryforwards 10.9 36.7 Capital loss carryforward 19.6 — Credit carryforwards 230.6 208.7 Other, net 23.6 15.4 Valuation allowance (34.2) (60.5) Net deferred tax assets $ 330.1 $ 324.8
Differences Between Income Taxes From Continuing Operations and U.S. Statutory Rate	The differences between income taxes from continuing operations for financial reporting purposes and the U.S. statutory rate of 21% in 2024, 2023, and 2022 are as follows (in millions of dollars): 2024 2023 2022 Income tax based on statutory rate $ (4.6) $ 5.2 $ (14.9) State income taxes, net of federal benefit (2.7) (0.9) 1.6 Foreign tax rate differential 0.9 4.6 1.6 U.S. work opportunity credits (7.8) (8.5) (10.7) Life insurance cash surrender value (6.2) (6.5) 7.8 Foreign items 0.3 3.0 0.1 Foreign-derived intangible income deduction (3.0) (2.3) (2.3) Sale of foreign subsidiaries 0.4 — 3.9 Foreign business taxes — 1.1 1.8 Change in deferred tax realizability (0.4) 4.4 — Non-deductible expenses 2.1 0.7 — Uncertain tax positions — (0.3) 0.1 Stock compensation 0.4 0.7 0.6 Outside basis difference on held for sale assets — (13.1) — MRP earnout liability revaluation (0.7) — — Non-deductible goodwill impairment — — 2.7 Other — 0.4 (0.2) Total $ (21.3) $ (11.5) $ (7.9)
Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions of dollars): 2024 2023 2022 Balance at beginning of the year $ 0.6 $ 0.5 $ 0.6 Additions for prior years’ tax positions — 0.3 — Reductions for prior years’ tax positions — — — Additions for settlements — — — Reductions for settlements — — — Reductions for expiration of statutes (0.1) (0.2) (0.1) Balance at end of the year $ 0.5 $ 0.6 $ 0.5

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 29, 2024
Supplemental Cash Flow Elements [Abstract]
Changes In Operating Assets And Liabilities, Net of the Effect of Deconsolidated Subsidiaries	Changes in operating assets and liabilities, net of acquisitions, as disclosed in the statements of cash flows, for the fiscal years 2024, 2023 and 2022, respectively, were as follows: 2024 2023 2022 (In millions of dollars) (Increase) decrease in trade accounts receivable $ (20.9) $ 147.2 $ (99.3) (Increase) decrease in prepaid expenses and other assets 2.8 (10.7) (24.6) (Increase) decrease in ROU assets 0.2 (2.2) (0.1) Increase (decrease) in accounts payable and accrued liabilities (31.1) (62.5) 44.3 Increase (decrease) in operating lease liabilities (12.1) (14.3) (18.7) Increase (decrease) in accrued payroll and related taxes (13.6) (59.8) (59.3) Increase (decrease) in accrued workers’ compensation and other claims 0.7 0.3 (5.2) Increase (decrease) in income and other taxes (3.2) — 21.9 Total changes in operating assets and liabilities, net of acquisitions $ (77.2) $ (2.0) $ (141.0)

Segment Disclosures (Tables)

Segment Disclosures (Tables)	12 Months Ended
	Dec. 29, 2024
Segment Reporting [Abstract]
Segment Revenue from Services	Prior periods have been recast to reflect the current period allocation method and new segment profitability measurement. The update had no impact on the consolidated financial information. Fiscal Year Ended December 29, 2024 (In millions of dollars) P&I SET EDU OCG Inter-Segment Consolidated Revenue from services $ 1,470.7 $ 1,422.8 $ 972.3 $ 468.3 $ (2.3) $ 4,331.8 Cost of services (1) 1,209.4 1,087.2 832.5 322.4 (2.3) 3,449.2 Direct salaries (2) 141.2 170.5 60.5 104.3 Other segment expenses (3) 85.4 75.3 35.4 35.9 SG&A expenses 226.6 245.8 95.9 140.2 — 708.5 Goodwill impairment charge — 72.8 — — — 72.8 Business unit profit (loss) $ 34.7 $ 17.0 $ 43.9 $ 5.7 $ — $ 101.3 Corporate SG&A (58.4) Asset impairment charge (13.5) Gain on sale of assets 5.4 Gain on sale of EMEA staffing operations 1.6 Depreciation and amortization (4) (51.5) Consolidated earnings from operations (15.1) Other income (expense), net (6.8) Earnings before taxes $ (21.9) (1) Cost of services are those costs directly associated with the earning of revenue. The primary examples of these types of costs are temporary employee wages, along with other employee related costs, including associated payroll taxes, temporary employee benefits, such as service bonus and holiday pay and health insurance, and workers’ compensation costs. These costs differ fundamentally from SG&A expenses in that they arise specifically from the action of providing our services to customers whereas SG&A costs are incurred regardless of whether or not we place temporary employees with our customers. (2) Direct salaries refers to the compensation expenses for employees directly related to the Company’s operations and service delivery. These expenses include salaries, related payroll taxes, various benefits and performance-based incentives and bonuses for these employees. (3) For each reportable segment, the other segment expense category includes: • P&I - Shared services costs for IT, human resources, legal and finance support, facilities and equipment-related costs, other professional services and overhead expenses, and operational software licenses. • SET - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • EDU - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • OCG - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, operational software licenses, and facilities and equipment-related costs. (4) Represents total company depreciation and amortization of intangibles, including the amortization of hosted software. Fiscal Year Ended December 31, 2023 (In millions of dollars) P&I SET EDU OCG International Inter-Segment Consolidated Revenue from services $ 1,539.5 $ 1,190.8 $ 841.9 $ 454.7 $ 812.1 $ (3.3) $ 4,835.7 Cost of services (1) 1,262.4 918.8 713.2 291.2 692.0 (3.3) 3,874.3 Direct salaries (2) 163.5 127.1 59.6 116.6 83.6 Other segment expenses (3) 97.3 69.8 32.8 42.7 38.4 SG&A expenses 260.8 196.9 92.4 159.3 122.0 — 831.4 Asset impairment charge 0.3 0.1 — 2.0 — — 2.4 Business unit profit (loss) $ 16.0 $ 75.0 $ 36.3 $ 2.2 $ (1.9) $ — $ 127.6 Corporate SG&A (63.2) Depreciation and amortization (4) (40.1) Consolidated earnings from operations 24.3 Other income (expense), net 0.6 Earnings before taxes $ 24.9 (1) Cost of services are those costs directly associated with the earning of revenue. The primary examples of these types of costs are temporary employee wages, along with other employee related costs, including associated payroll taxes, temporary employee benefits, such as service bonus and holiday pay and health insurance, and workers’ compensation costs. These costs differ fundamentally from SG&A expenses in that they arise specifically from the action of providing our services to customers whereas SG&A costs are incurred regardless of whether or not we place temporary employees with our customers. (2) Direct salaries refers to the compensation expenses for employees directly related to the Company’s operations and service delivery. These expenses include salaries, related payroll taxes, various benefits and performance-based incentives and bonuses for these employees. In the International segment, this includes costs related to IT, human resources, legal and finance costs incurred in the foreign subsidiaries. (3) For each reportable segment, the other segment expense category includes: • P&I - Shared services costs for IT, human resources, legal and finance support, facilities and equipment-related costs, other professional services and overhead expenses, and operational software licenses. • SET - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • EDU - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • OCG - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, operational software licenses, and facilities and equipment-related costs. • International - Facilities and equipment-related costs, other professional services and overhead expenses, shared services costs for IT, human resources, legal and finance support, and operational software licenses. (4) Represents total company depreciation and amortization of intangibles, including the amortization of hosted software. Fiscal Year Ended January 1, 2023 (In millions of dollars) P&I SET EDU OCG International Inter-Segment Consolidated Revenue from services $ 1,709.9 $ 1,265.4 $ 636.2 $ 468.0 $ 887.0 $ (1.1) $ 4,965.4 Cost of services (1) 1,396.8 968.4 535.9 298.4 755.2 (1.1) 3,953.6 Direct salaries (2) 185.1 141.7 50.8 114.8 85.1 Other segment expenses (3) 108.4 76.3 30.7 39.8 41.4 SG&A expenses 293.5 218.0 81.5 154.6 126.5 — 874.1 Goodwill impairment charge — — — 41.0 — — 41.0 Business unit profit (loss) $ 19.6 $ 79.0 $ 18.8 $ (26.0) $ 5.3 $ — $ 96.7 Corporate SG&A (32.3) Loss on disposal (18.7) Gain on sale of assets 6.2 Depreciation and amortization (4) (37.1) Consolidated earnings from operations 14.8 Loss on investment in Persol Holdings (67.2) Loss on currency translation from liquidation of subsidiary (20.4) Other income (expense), net 1.6 Loss before taxes and equity in net earnings of affiliate $ (71.2) (1) Cost of services are those costs directly associated with the earning of revenue. The primary examples of these types of costs are temporary employee wages, along with other employee related costs, including associated payroll taxes, temporary employee benefits, such as service bonus and holiday pay and health insurance, and workers’ compensation costs. These costs differ fundamentally from SG&A expenses in that they arise specifically from the action of providing our services to customers whereas SG&A costs are incurred regardless of whether or not we place temporary employees with our customers. (2) Direct salaries refers to the compensation expenses for employees directly related to the Company’s operations and service delivery. These expenses include salaries, related payroll taxes, various benefits and performance-based incentives and bonuses for these employees. In the International segment, this includes costs related to IT, human resources, legal and finance costs incurred in the foreign subsidiaries. (3) For each reportable segment, the other segment expense category includes: • P&I - Shared services costs for IT, human resources, legal and finance support, facilities and equipment-related costs, other professional services and overhead expenses, and operational software licenses. • SET - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, and facilities and equipment-related costs. • EDU - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, and facilities and equipment-related costs. • OCG - Shared services costs for IT, human resources, legal and finance support, other professional services and overhead expenses, facilities and equipment-related costs, and operational software licenses. • International - Facilities and equipment-related costs, other professional services and overhead expenses, shared services costs for IT, human resources, legal and finance support, and operational software licenses. (4)
Depreciation and Amortization by Segment	Depreciation and amortization expense is included in SG&A expenses in our consolidated statements of earnings. Depreciation and amortization expense amounts below include amortization of hosted software, which are excluded in the presentation of depreciation and amortization in our consolidated statements of cash flows. The depreciation and amortization amounts by segment are as follows: 2024 2023 2022 (In millions of dollars) Depreciation and amortization: Professional & Industrial $ 9.5 $ 8.0 $ 7.7 Science, Engineering & Technology 26.1 16.1 15.4 Education 8.3 7.7 6.2 Outsourcing & Consulting 7.6 5.9 4.8 International — 2.4 2.7
Summary of Revenue From Services by Geographic Area	A summary of revenue from services by geographic area for 2024, 2023 and 2022 follows: 2024 2023 2022 (In millions of dollars) Revenue from Services: United States $ 3,876.9 $ 3,555.8 $ 3,671.5 Foreign 454.9 1,279.9 1,293.9 Total $ 4,331.8 $ 4,835.7 $ 4,965.4
Summary of Long-Lived Assets By Geographic Area	A summary of long-lived assets information by geographic area as of year-end 2024 and 2023 follows: 2024 2023 (In millions of dollars) Long-Lived Assets: United States $ 70.1 $ 68.4 Foreign 2.8 21.6 Total $ 72.9 $ 90.0

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023	Feb. 14, 2022	Jan. 02, 2022
Accounting Policies [Line Items]
Advertising expense	$ 9.6	$ 7.8	$ 6.4
Property and equipment, net, held for sale		27.8
Depreciation expense	12.5	12.4	13.6
Amortization of intangible assets	51.5	40.1	37.1
Intangible assets, accumulated amortization	91.4	64.1
Intangible assets, accumulated amortization, held for sale		2.3
Accounts payable	613.8	646.1
Accrued payroll and related taxes	163.9	156.2
Disposal Group, Held-for-Sale, Not Discontinued Operations
Accounting Policies [Line Items]
Short-term hosted software		0.1
Long-term hosted software		3.4
Workers Compensation
Accounting Policies [Line Items]
Liability for claims	1
Cloud Computing Arrangements
Accounting Policies [Line Items]
Amortization of intangible assets	11.6	6.9	$ 4.2
Intangible assets, accumulated amortization	23.5	14.2
Prepaid Expenses and Other Current Assets | Cloud Computing Arrangements
Accounting Policies [Line Items]
Short-term hosted software	4.5	4.9
Other Noncurrent Assets | Cloud Computing Arrangements
Accounting Policies [Line Items]
Long-term hosted software	41.4	27.3
Book overdrafts
Accounting Policies [Line Items]
Accounts payable	5.1	1.2
Accrued payroll and related taxes	$ 11.4	$ 9.6
PersolKelly Pte. Ltd.
Accounting Policies [Line Items]
Equity method investment, ownership percentage				49%	49%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Property and Equipment At Cost and Depreciable Useful Lives (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment	$ 140	$ 138.1
Total property, plant and equipment, including held-for-sale, gross		165.9
Land
Property, Plant and Equipment [Line Items]
Property and equipment	0
Total property, plant and equipment, including held-for-sale, gross		0
Work in process
Property, Plant and Equipment [Line Items]
Property and equipment	2.3
Total property, plant and equipment, including held-for-sale, gross		6.7
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 0.4
Total property, plant and equipment, including held-for-sale, gross		0.4
Estimated useful life	30 years
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment	$ 119.9
Total property, plant and equipment, including held-for-sale, gross		123.1
Computer hardware and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Computer hardware and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years
Equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	$ 10.9
Total property, plant and equipment, including held-for-sale, gross		22.6
Estimated useful life	5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 6.5
Total property, plant and equipment, including held-for-sale, gross		$ 13.1
Leasehold improvements | Headquarters
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Leasehold improvements | Maximum | Branches
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years

Summary of Significant Accoun_6

Summary of Significant Accounting Policies – Goodwill and Other Intangible Assets (Details)	Dec. 29, 2024
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenues by Service Type (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Disaggregation of Revenue [Line Items]
Revenue from services	$ 4,331.8	$ 4,835.7	$ 4,965.4
Science, Engineering & Technology
Disaggregation of Revenue [Line Items]
Revenue from services	1,422.8	1,190.8	1,265.4
Outsourcing & Consulting
Disaggregation of Revenue [Line Items]
Revenue from services	468.3	454.7	468
International
Disaggregation of Revenue [Line Items]
Revenue from services	0	812.1	887
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from services	(2.3)	(3.3)	(1.1)
Reporting Segments | Professional & Industrial
Disaggregation of Revenue [Line Items]
Revenue from services	1,470.7	1,539.5	1,709.9
Reporting Segments | Professional & Industrial | Staffing services
Disaggregation of Revenue [Line Items]
Revenue from services	956.9	1,014.2	1,229.5
Reporting Segments | Professional & Industrial | Permanent placement
Disaggregation of Revenue [Line Items]
Revenue from services	9.7	14	30.3
Reporting Segments | Professional & Industrial | Outcome-based services
Disaggregation of Revenue [Line Items]
Revenue from services	504.1	511.3	450.1
Reporting Segments | Science, Engineering & Technology
Disaggregation of Revenue [Line Items]
Revenue from services	1,422.8	1,190.8	1,265.4
Reporting Segments | Science, Engineering & Technology | Staffing services
Disaggregation of Revenue [Line Items]
Revenue from services	945.3	792.7	869
Reporting Segments | Science, Engineering & Technology | Permanent placement
Disaggregation of Revenue [Line Items]
Revenue from services	29.5	17.8	29.7
Reporting Segments | Science, Engineering & Technology | Outcome-based services
Disaggregation of Revenue [Line Items]
Revenue from services	421.5	380.3	366.7
Reporting Segments | Science, Engineering & Technology | Talent solutions
Disaggregation of Revenue [Line Items]
Revenue from services	26.5	0	0
Reporting Segments | Education
Disaggregation of Revenue [Line Items]
Revenue from services	972.3	841.9	636.2
Reporting Segments | Education | Staffing services
Disaggregation of Revenue [Line Items]
Revenue from services	966	834.9	627.8
Reporting Segments | Education | Permanent placement
Disaggregation of Revenue [Line Items]
Revenue from services	6.3	7	8.4
Reporting Segments | Outsourcing & Consulting
Disaggregation of Revenue [Line Items]
Revenue from services	468.3	454.7	468
Reporting Segments | Outsourcing & Consulting | Talent solutions
Disaggregation of Revenue [Line Items]
Revenue from services	468.3	454.7	468
Reporting Segments | International
Disaggregation of Revenue [Line Items]
Revenue from services	0	812.1	887
Reporting Segments | International | Staffing services
Disaggregation of Revenue [Line Items]
Revenue from services	0	790	851.4
Reporting Segments | International | Permanent placement
Disaggregation of Revenue [Line Items]
Revenue from services	0	20.7	21.2
Reporting Segments | International | Talent solutions
Disaggregation of Revenue [Line Items]
Revenue from services	$ 0	$ 1.4	$ 14.4

Revenue - Revenue by Country (D

Revenue - Revenue by Country (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Disaggregation of Revenue [Line Items]
Revenue from services	$ 4,331.8	$ 4,835.7	$ 4,965.4
Total Americas Region
Disaggregation of Revenue [Line Items]
Revenue from services	4,234.2	3,928.3	3,998.6
United States
Disaggregation of Revenue [Line Items]
Revenue from services	3,876.9	3,555.8	3,671.5
Canada
Disaggregation of Revenue [Line Items]
Revenue from services	188.6	189.8	168.2
Puerto Rico
Disaggregation of Revenue [Line Items]
Revenue from services	108	107	112.4
Mexico
Disaggregation of Revenue [Line Items]
Revenue from services	60.7	75.7	46.5
Total Europe Region
Disaggregation of Revenue [Line Items]
Revenue from services	41.9	863.7	924.7
Switzerland
Disaggregation of Revenue [Line Items]
Revenue from services	4	224.2	222.8
France
Disaggregation of Revenue [Line Items]
Revenue from services	0.4	194.4	199.4
Portugal
Disaggregation of Revenue [Line Items]
Revenue from services	0	189.4	169.5
Italy
Disaggregation of Revenue [Line Items]
Revenue from services	0	63.9	69.3
Russia
Disaggregation of Revenue [Line Items]
Revenue from services	0	0	63.4
Other
Disaggregation of Revenue [Line Items]
Revenue from services	37.5	191.8	200.3
Total Asia-Pacific Region
Disaggregation of Revenue [Line Items]
Revenue from services	$ 55.7	$ 43.7	$ 42.1

Revenue - Disaggregation of R_2

Revenue - Disaggregation of Revenues by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Disaggregation of Revenue [Line Items]
Revenue from services	$ 4,331.8	$ 4,835.7	$ 4,965.4
Americas
Disaggregation of Revenue [Line Items]
Revenue from services	4,234.2	3,928.3	3,998.6
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue from services	55.7	43.7	42.1
Science, Engineering & Technology
Disaggregation of Revenue [Line Items]
Revenue from services	1,422.8	1,190.8	1,265.4
Science, Engineering & Technology | Americas
Disaggregation of Revenue [Line Items]
Revenue from services	1,412.1	1,175.2	1,250.3
Science, Engineering & Technology | Europe
Disaggregation of Revenue [Line Items]
Revenue from services	10.7	15.6	15.1
Outsourcing & Consulting
Disaggregation of Revenue [Line Items]
Revenue from services	468.3	454.7	468
Outsourcing & Consulting | Americas
Disaggregation of Revenue [Line Items]
Revenue from services	381.4	375	403.3
Outsourcing & Consulting | Europe
Disaggregation of Revenue [Line Items]
Revenue from services	31.2	36	22.6
Outsourcing & Consulting | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue from services	55.7	43.7	42.1
International
Disaggregation of Revenue [Line Items]
Revenue from services	0	812.1	887
International | Europe
Disaggregation of Revenue [Line Items]
Revenue from services	$ 0	$ 812.1	$ 887

Revenue - Narrative (Details)

Revenue - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 29, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Jan. 01, 2023 USD ($)
Deferred Costs [Line Items]
Number of operating segments | segment	4
Deferred Fulfillment Costs
Deferred Costs [Line Items]
Capitalized contract cost, gross	$ 1.8	$ 3.4
Capitalized contract cost, amortization	$ 6.7	$ 7.7	$ 10.1

Credit Losses - Allowance for C

Credit Losses - Allowance for Credit Losses Related to Trade Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Allowance for credit losses:
Beginning balance	$ 8	$ 7.7	$ 9.4
Current period provision	0.6	2.1	1.3
Currency exchange effects	(0.3)	0.3	(0.2)
Disposition of EMEA staffing operations	(2.4)	0	0
Write-offs	(1)	(2.1)	(2.8)
Ending balance	$ 4.9	$ 8	$ 7.7

Credit Losses - Narrative (Deta

Credit Losses - Narrative (Details) - USD ($) $ in Millions	Dec. 29, 2024	Jun. 30, 2024	Mar. 31, 2024
Disposal Group, Not Discontinued Operations | European Staffing Operations
Financing Receivable, Allowance for Credit Loss [Line Items]
Other receivables	$ 16.4	$ 16.8	$ 26.9

Acquisitions and Dispositions -

Acquisitions and Dispositions - Acquisitions Narrative (Details) - USD ($) $ in Millions				3 Months Ended		12 Months Ended
	Nov. 13, 2024	May 31, 2024	Mar. 07, 2022	Dec. 29, 2024	Jul. 03, 2022	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Business Acquisition [Line Items]
Goodwill, net				$ 304.2		$ 304.2	$ 151.1	$ 151.1
Goodwill impairment charge						72.8	$ 0	41
Children's Therapy Center (CTC) | Kelly Services USA, LLC (KSU)
Business Acquisition [Line Items]
Ownership percentage acquired (percent)	100%
Purchase price of acquisition	$ 3.3
Purchase price paid at closing	3.1
Goodwill, net	$ 3
Motion Recruitment Partners, LLC (MRP)
Business Acquisition [Line Items]
Ownership percentage acquired (percent)		100%
Purchase price of acquisition		$ 425
Purchase price paid at closing		440
Goodwill, net		222.9
Business combination, consideration transferred, other		3.4
Possible future contingent consideration		60
Contingent consideration, liability				0		0
Payments to acquire businesses, working capital adjustment				$ 1.4
Intangible assets acquired		145.9
Pro forma information, revenue of acquiree since acquisition date, actual						285.8
Pro forma information, earnings or loss of acquiree since acquisition date, actual						$ 4.2
Motion Recruitment Partners, LLC (MRP) | Customer relationships
Business Acquisition [Line Items]
Intangible assets acquired		$ 88.1
Acquired finite-lived intangible assets, weighted average useful life (years)		15 years
Motion Recruitment Partners, LLC (MRP) | Trade names
Business Acquisition [Line Items]
Intangible assets acquired		$ 56.5
Motion Recruitment Partners, LLC (MRP) | Trade names | Minimum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life (years)		10 years
Motion Recruitment Partners, LLC (MRP) | Trade names | Maximum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life (years)		15 years
Motion Recruitment Partners, LLC (MRP) | Non-compete agreements
Business Acquisition [Line Items]
Intangible assets acquired		$ 1.3
Acquired finite-lived intangible assets, weighted average useful life (years)		4 years
Pediatric Therapeutic Services
Business Acquisition [Line Items]
Ownership percentage acquired (percent)					100%
Purchase price of acquisition					$ 82.1
Purchase price paid at closing					$ 85.7
RocketPower
Business Acquisition [Line Items]
Ownership percentage acquired (percent)			100%
Purchase price of acquisition			$ 59.3
Purchase price paid at closing			$ 61.8
Goodwill impairment charge								$ 41

Acquisitions and Dispositions_2

Acquisitions and Dispositions - Schedule of Purchase Price (Details) - USD ($) $ in Millions			3 Months Ended
	Nov. 13, 2024	May 31, 2024	Dec. 29, 2024
Motion Recruitment Partners, LLC (MRP)
Business Acquisition [Line Items]
Cash consideration paid		$ 425
Estimated cash acquired		13.6
Estimated net working capital adjustment		1.4
Total cash consideration		440
Additional consideration payable		$ 3.4
Net working capital adjustment			$ 1.4
Total consideration			$ 444.8
Children's Therapy Center (CTC) | Kelly Services USA, LLC (KSU)
Business Acquisition [Line Items]
Total cash consideration	$ 3.1

Acquisitions and Dispositions_3

Acquisitions and Dispositions - Fair Value of Assets Assumed and Liabilities Acquired (Details) - USD ($) $ in Millions	Dec. 29, 2024	May 31, 2024	Dec. 31, 2023	Jan. 01, 2023
Business Acquisition [Line Items]
Goodwill	$ 304.2		$ 151.1	$ 151.1
Motion Recruitment Partners, LLC (MRP)
Business Acquisition [Line Items]
Cash and equivalents		$ 12.6
Trade accounts receivable		89.1
Prepaid expenses and other current assets		8.5
Net property and equipment		3.1
Operating lease right-of-use assets		11.9
Goodwill		222.9
Intangibles, net		145.9
Other assets, noncurrent		10.6
Accounts payable and accrued liabilities, current		(12.1)
Operating lease liabilities, current		(4)
Accrued payroll and related taxes, current		(15.9)
Income and other taxes, current		(0.5)
Operating lease liabilities, noncurrent		(9)
Other long-term liabilities		(18.3)
Total consideration, including working capital adjustments		$ 444.8

Acquisition and Disposition - P

Acquisition and Disposition - Pro Forma Information (Details) - Motion Recruitment Partners, LLC (MRP) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Pro forma revenues	$ 4,552.2	$ 5,389.8
Pro forma net earnings (loss)	$ (4.9)	$ 30.8

Acquisition and Disposition - D

Acquisition and Disposition - Disposition Narrative (Details) - USD ($) $ in Millions			6 Months Ended	12 Months Ended
	Jan. 02, 2024	Jul. 20, 2022	Dec. 29, 2024	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023	Jun. 30, 2024	Mar. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of EMEA staffing operations, net of cash disposed				$ 77.1	$ 0	$ 0
Gain on sale of EMEA staffing operations				(1.6)	0	0
Earnings from operations from EMEA staffing operations				11.3	(5)	(31.8)
Cash disposed from sale of Russia, net of proceeds				0	0	6
Loss on disposal				0	0	18.7
Disposal Group, Not Discontinued Operations | European Staffing Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from disposition	$ 110.6
Proceeds from sale of EMEA staffing operations, net of cash disposed	$ 77.1
Other receivables			$ 16.4	16.4			$ 16.8	$ 26.9
Working capital and other adjustments							$ 10.1
Increase (decrease) in other receivables			$ 0.4
Gain on sale of EMEA staffing operations				$ (1.6)
Disposal Group, Including Discontinued Operation, Operating Income (Loss)					$ 4.3
Disposal Group, Not Discontinued Operations | Russian Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from disposition		$ 7.4
Cash disposed from sale of Russia, net of proceeds		$ 6
Loss on disposal						18.7
Disposal group, including discontinued operation, revenue						63.4
Disposal Group, Including Discontinued Operation, Operating Income (Loss)						$ 1.4

Acquisitions and Dispositions_4

Acquisitions and Dispositions - Schedule of Divested Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 29, 2024	Jan. 02, 2024	Dec. 31, 2023	Jan. 01, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and equivalents	$ 0		$ 33.5	$ 0
Assets divested	$ 0		$ 291.3
Disposal Group, Not Discontinued Operations | European Staffing Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and equivalents		$ 33.5
Trade accounts receivable, net		202.8
Prepaid expenses and other current assets		29
Property and equipment, net		4.2
Operating lease right-of-use assets		14.2
Deferred taxes		4.1
Other assets		5.4
Assets divested		293.2
Accounts payable and accrued liabilities		(24.5)
Operating lease liabilities, current		(5.7)
Accrued payroll and related taxes		(91.6)
Income and other taxes		(32.9)
Operating lease liabilities, noncurrent		(8.9)
Accrued retirement benefits		(1.7)
Other long-term liabilities		(4.6)
Liabilities divested		(169.9)
Disposal group, net		$ 123.3

Investment in Persol Holdings -

Investment in Persol Holdings - Narrative (Details) - USD ($) $ in Millions			2 Months Ended	3 Months Ended	12 Months Ended
	Feb. 15, 2022	Feb. 14, 2022	Feb. 15, 2022	Apr. 03, 2022	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023	Jan. 31, 2022
Schedule of Investments [Line Items]
Stock repurchased during period, amount in excess of par value		$ 25.6
Proceeds from sale of Persol Holdings investment					$ 0	$ 0	$ 196.9
Loss on investment in Persol Holdings					0	0	(67.2)
Equity securities gain (loss)			$ (52.4)		3.8
Loss on currency translation from liquidation of subsidiary					0	0	(20.4)
Gain on foreign currency remeasurement					$ 0	$ 0	5.5
Persol Holdings | Persol Asia Pacific Pte.
Schedule of Investments [Line Items]
Subsidiary, ownership percentage, parent								100%
Persol Holdings Investment
Schedule of Investments [Line Items]
Stock repurchased and retired during period, value		$ 27.2
Proceeds from sale of Persol Holdings investment	$ 196.9
Loss on investment in Persol Holdings				$ (67.2)
Equity securities gain (loss)	$ (14.8)
Persol Holdings Investment | Class A common stock
Schedule of Investments [Line Items]
Stock repurchased during period, shares		1,576,169
Persol Holdings Investment | Class B common stock
Schedule of Investments [Line Items]
Stock repurchased during period, shares		1,475
Kelly Services Japan, Inc.
Schedule of Investments [Line Items]
Loss on currency translation from liquidation of subsidiary				(20.4)
Gain on foreign currency remeasurement				$ 5.5			$ 5.5

Investment in PersolKelly Pte_2

Investment in PersolKelly Pte. Ltd. - Narrative (Details) $ in Millions		3 Months Ended	12 Months Ended
	Mar. 01, 2022 USD ($)	Apr. 03, 2022 USD ($)	Dec. 29, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jan. 01, 2023 USD ($)	Feb. 14, 2022 country	Jan. 02, 2022
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity method investment			$ 0	$ 0	$ 119.5
Equity in net earnings of affiliate		$ 0.8	0	0	$ 0.8
Equity securities, FV-NI and without readily determinable fair value			11	7.9
PersolKelly Pte. Ltd.
Schedule of Equity Method Investments [Line Items]
Equity securities, FV-NI and without readily determinable fair value			$ 6.4	$ 6.4
PersolKelly Pte. Ltd.
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage						49%	49%
Number of geographies in which entity operates | country						10
Equity method investment, amount sold, percentage						95%
Proceeds from sale of equity method investment	$ 119.5
Equity method investment, amount sold	117.6
Amounts reclassified from accumulated other comprehensive income (loss) - liquidation of Japan subsidiary	(1.9)
Gain on disposal	$ 1.9
Equity ownership, excluding consolidated entity and equity method investee, percentage			2.50%
Equity securities, FV-NI and without readily determinable fair value			$ 6.4

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Measurements on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Foreign currency forward contract, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	$ 0	$ 3.6
Measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	6.4	42.5
Total assets at fair value	6.4	42.5
Total liabilities at fair value	(4.1)	(6.6)
Measured on a recurring basis | Brazil
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	(1.7)	(3)
Measured on a recurring basis | Total Europe Region
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	(2)
Measured on a recurring basis | Foreign currency forward contract, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		(3.6)
Measured on a recurring basis | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	(0.4)
Measured on a recurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	6.4	42.5
Total assets at fair value	6.4	42.5
Total liabilities at fair value	0	0
Measured on a recurring basis | Level 1 | Brazil
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	0	0
Measured on a recurring basis | Level 1 | Total Europe Region
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	0
Measured on a recurring basis | Level 1 | Foreign currency forward contract, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		0
Measured on a recurring basis | Level 1 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	0
Measured on a recurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Total assets at fair value	0	0
Total liabilities at fair value	(0.4)	(3.6)
Measured on a recurring basis | Level 2 | Brazil
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	0	0
Measured on a recurring basis | Level 2 | Total Europe Region
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	0
Measured on a recurring basis | Level 2 | Foreign currency forward contract, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		(3.6)
Measured on a recurring basis | Level 2 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	(0.4)
Measured on a recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Total assets at fair value	0	0
Total liabilities at fair value	(3.7)	(3)
Measured on a recurring basis | Level 3 | Brazil
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	(1.7)	(3)
Measured on a recurring basis | Level 3 | Total Europe Region
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification	(2)
Measured on a recurring basis | Level 3 | Foreign currency forward contract, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability		$ 0
Measured on a recurring basis | Level 3 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	$ 0

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) € in Millions, $ in Millions		2 Months Ended	3 Months Ended				12 Months Ended
	Jan. 05, 2024 USD ($)	Jan. 05, 2024 USD ($)	Dec. 29, 2024 USD ($)	Mar. 31, 2024 USD ($)	Apr. 02, 2023 USD ($)	Apr. 03, 2022 USD ($)	Dec. 29, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jan. 01, 2023 USD ($)	Jul. 17, 2024 USD ($) derivative	May 31, 2024 USD ($)	Feb. 08, 2024 EUR (€)	Nov. 02, 2023 EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on forward contract								$ 3.6
Gain (loss) on forward contract							$ 1.2	(3.6)	$ 0
Disposition, increase (decrease) in indemnification liabilities							(0.7)
Payment for contingent consideration liability, financing activities							0	2.5	3.3
Equity securities, FV-NI and without readily determinable fair value			$ 11				11	7.9
PersolKelly Pte. Ltd.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, FV-NI and without readily determinable fair value			$ 6.4				$ 6.4	6.4
PersolKelly Pte. Ltd.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity ownership, excluding consolidated entity and equity method investee, percentage			2.50%				2.50%
Motion Recruitment Partners, LLC (MRP)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability			$ 0				$ 0
Possible future contingent consideration											$ 60
Greenwood/Asher
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payment for contingent consideration liability, financing activities						$ 0.7		1.4
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, FV-NI and without readily determinable fair value			3.5				3.5		0.4
Disposal group, including discontinued operation, investment			0.1				0.1
Gain (loss) on sale of investments			0.6
Equity securities, FV-NI, unrealized gain			3.2
Level 3 | Motion Recruitment Partners, LLC (MRP)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability			0				0				$ 3.4
Possible future contingent consideration			60				60
Level 3 | Greenwood/Asher
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability								0	$ 3.3
Payment for contingent consideration liability					$ 3.3	$ 2.3
Level 3 | Brazil
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposition, indemnification liabilities								3
Total Europe Region | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposition, increase (decrease) in indemnification liabilities							(0.1)
Brazil
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposition, increase (decrease) in indemnification liabilities			(0.7)				(0.7)
Brazil | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposition, indemnification liabilities			8.8				8.8
Measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds			6.4				6.4	42.5
Measured on a recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds			0				0	0
Measured on a recurring basis | Total Europe Region
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification			(2)				(2)
Measured on a recurring basis | Total Europe Region | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification			(2)				(2)
Measured on a recurring basis | Brazil
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification			(1.7)				(1.7)	(3)
Measured on a recurring basis | Brazil | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indemnification			(1.7)				(1.7)	(3)
Foreign currency forward contract, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount | €												€ 17	€ 90
Payments for derivative instrument, investing activities	$ 2.4		0.4
Derivative, gain (loss) on derivative, net			(0.4)
Derivative asset			0				0
Derivative liability			0				0	3.6
Gain (loss) on forward contract								(3.6)
Derivative instruments not designated as hedging instruments, gain				$ 1.2
Derivative instruments not designated as hedging instruments, loss		$ 2.4
Foreign currency forward contract, net | Measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability								(3.6)
Foreign currency forward contract, net | Measured on a recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability								0
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, notional amount										$ 50
Derivative instruments not designated as hedging instruments, loss							0.4
Number of interest rate swaps | derivative										2
Gain (loss) on forward contract							(0.2)
Proceeds from derivative instrument, financing activities							0.2
Interest Rate Swap | Measured on a recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability			(0.4)				(0.4)
Interest Rate Swap | Measured on a recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability			0				0
Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds			6.4				6.4	8
Accounts Payable and Accrued Liabilities | Brazil | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposition, indemnification liabilities			0.9				0.9	0.1
Other Long Term Liabilities | Brazil | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disposition, indemnification liabilities			$ 0.8				$ 0.8	$ 2.9

Restructuring and Transformat_3

Restructuring and Transformation Activities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Apr. 02, 2023	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			$ 6.6	$ 40.6	$ 1.7
Asset impairment charge			13.5	$ 2.4
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]				SG&A expenses	SG&A expenses
Asset impairment charge			13.5	$ 2.4	$ 0
Restructuring reserve	$ 15.1		0.3	15.1	$ 0.3
2024 Actions
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			6.1
Severance Costs			3
Lease Termination Costs, Transformation and Other			3.1
Asset impairment charge			$ 13.5
2023 Actions
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 5.7		38.6
Severance Costs	$ 3.1	4.6		19.3
Lease Termination Costs, Transformation and Other				19.3
Lease termination and other costs		$ 1.1
2023 Actions | Transformation Activities
Restructuring Cost and Reserve [Line Items]
Severance Costs				11.6
Lease termination and other costs				0.5
Restructuring and related cost, incurred cost				32.2
Professional fees				17.7
Asset impairment charge				$ 2.4

Restructuring and Transformat_4

Restructuring and Transformation Activities - Schedule of Restructuring and Related Costs (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Apr. 02, 2023	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Restructuring Cost and Reserve [Line Items]
Total			$ 6.6	$ 40.6	$ 1.7
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]				SG&A expenses	SG&A expenses
2024 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs			3
Lease Termination Costs, Transformation and Other			3.1
Total			6.1
2023 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 3.1	$ 4.6		$ 19.3
Lease Termination Costs, Transformation and Other				19.3
Total		$ 5.7		38.6
2022 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs					$ 1.5
Lease Termination Costs, Transformation and Other					0.2
Total					1.7
Professional & Industrial | 2024 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs			0.3
Lease Termination Costs, Transformation and Other			0
Total			0.3
Professional & Industrial | 2023 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs				6
Lease Termination Costs, Transformation and Other				0.7
Total				6.7
Professional & Industrial | 2022 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs					0.1
Lease Termination Costs, Transformation and Other					0.2
Total					0.3
Science, Engineering & Technology | 2024 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs			0.3
Lease Termination Costs, Transformation and Other			0
Total			0.3
Science, Engineering & Technology | 2023 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs				1.3
Lease Termination Costs, Transformation and Other				0.3
Total				1.6
Outsourcing & Consulting | 2024 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs			0.4
Lease Termination Costs, Transformation and Other			0
Total			0.4
Outsourcing & Consulting | 2023 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs				3
Lease Termination Costs, Transformation and Other				0
Total				3
Outsourcing & Consulting | 2022 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs					0.2
Lease Termination Costs, Transformation and Other					0
Total					0.2
Education | 2023 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs				1
Lease Termination Costs, Transformation and Other				0
Total				1
Education | 2022 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs					0.4
Lease Termination Costs, Transformation and Other					0
Total					0.4
International | 2023 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs				3.3
Lease Termination Costs, Transformation and Other				0
Total				3.3
Corporate | 2024 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs			2
Lease Termination Costs, Transformation and Other			3.1
Total			$ 5.1
Corporate | 2023 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs				4.7
Lease Termination Costs, Transformation and Other				18.3
Total				$ 23
Corporate | 2022 Actions
Restructuring Cost and Reserve [Line Items]
Severance Costs					0.8
Lease Termination Costs, Transformation and Other					0
Total					$ 0.8

Restructuring and Transformat_5

Restructuring and Transformation Activities - Restructuring Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Restructuring Reserve [Roll Forward]
Balance at beginning of year	$ 15.1	$ 0.3
Accruals	6.6	40.6	$ 1.7
Reductions for cash payments	(19.4)	(23.8)
Disposition of EMEA staffing operations	(1.5)
Accrual adjustments	(0.5)	(2)
Balance at end of year	$ 0.3	$ 15.1	$ 0.3

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 151.1	$ 151.1
Additions to Goodwill	225.9	0
Goodwill impairment charge	(72.8)	0	$ (41)
Goodwill, ending balance	304.2	151.1	151.1
Science, Engineering & Technology
Goodwill [Roll Forward]
Goodwill, beginning balance	111.3	111.3
Additions to Goodwill	222.9	0
Goodwill impairment charge	(72.8)	0
Goodwill, ending balance	261.4	111.3	111.3
Education
Goodwill [Roll Forward]
Goodwill, beginning balance	39.8	39.8
Additions to Goodwill	3	0
Goodwill impairment charge	0	0
Goodwill, ending balance	$ 42.8	$ 39.8	$ 39.8

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Finite Lived Intangible Assets (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Less: Accumulated Amortization	$ 91.4	$ 64.1
Intangible Assets, Gross Carrying Amount	347.7	201.8
Intangible Assets, Net	$ 256.3	137.7
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 229.2	141.1
Less: Accumulated Amortization	65.9	47.7
Net	$ 163.3	93.4
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 108.1	51.6
Less: Accumulated Amortization	20.4	12.8
Net	$ 87.7	38.8
Trade names | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years
Trade names | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5.6	4.3
Less: Accumulated Amortization	2.7	1.7
Net	$ 2.9	2.6
Finite-lived intangible asset, useful life	5 years
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4.8	4.8
Less: Accumulated Amortization	2.4	1.9
Net	$ 2.4	$ 2.9
Finite-lived intangible asset, useful life	10 years

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charge	$ 72.8	$ 0	$ 41
Goodwill, net	304.2	151.1	151.1
Amortization of intangible assets	51.5	$ 40.1	37.1
Finite-lived intangible assets, amortization expense, next 12 months	30.1
Finite-lived intangible assets, amortization expense, year 2	29.4
Finite-lived intangible assets, amortization expense, year 3	28.8
Finite-lived intangible assets, amortization expense, year 4	27.4
Finite-lived intangible assets, amortization expense, year 5	24.8
Softworld, Inc.
Finite-Lived Intangible Assets [Line Items]
Reporting unit, percentage of fair value in excess of carrying amount		10%
Goodwill impairment charge	72.8
Tax benefit, impairment losses	18.4
Goodwill, net	$ 38.5
Motion Recruitment Partners, LLC (MRP)
Finite-Lived Intangible Assets [Line Items]
Reporting unit, percentage of fair value in excess of carrying amount	10%
Selling, General and Administrative Expenses
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 27.3	$ 20.9	$ 19.4

Other Assets - Schedule of Othe

Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Other Assets [Line Items]
Intangibles, net	$ 256.3	$ 137.7
Noncurrent restricted cash	6.4	8	$ 8.6
Workers' compensation and other claims receivable	4.9	11.7
Equity securities, FV-NI and without readily determinable fair value	11	7.9
Other	5.1	7.8
Total other assets	45.3	43.1
Total other assets, including held-for-sale		48.5
Intangible assets, accumulated amortization	91.4	64.1
PersolKelly Pte. Ltd.
Other Assets [Line Items]
Equity securities, FV-NI and without readily determinable fair value	6.4
Disposal Group, Held-for-Sale, Not Discontinued Operations | European Staffing Operations
Other Assets [Line Items]
Total other assets		5.4
Long Term Hosted Software, net of accumulated amortization
Other Assets [Line Items]
Intangibles, net	17.9	13.1
Long Term Hosted Software, net of accumulated amortization | Other Assets
Other Assets [Line Items]
Intangible assets, accumulated amortization	$ 23.5	$ 14.2

Leases - Narrative (Details)

Leases - Narrative (Details)	12 Months Ended
	Dec. 29, 2024
Minimum
Lessee, Lease, Description [Line Items]
Leases, remaining lease term (years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Leases, remaining lease term (years)	10 years

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Operating:
Operating lease cost	$ 14.6	$ 21	$ 22.8
Short-term lease cost	0.6	2	2.4
Variable lease cost	3.5	6.1	5.2
Financing:
Amortization of ROU assets	0.3	0.6	0.6
Interest on lease liabilities	0	0	0.1
Total lease cost	$ 19	$ 29.7	$ 31.1

Leases - Supplemental Consolida

Leases - Supplemental Consolidated Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023
ROU Assets:
Operating lease right-of-use assets	$ 47	$ 47.1
Operating lease, right-of-use asset, including held-for-sale		$ 61.3
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Finance lease, right-of-use assets	$ 0	$ 0.3
Total lease assets	47	61.6
ROU Liabilities:
Operating lease liabilities	12.3	8.4
Operating lease current liabilities		14
Operating lease liabilities	50.9	42.9
Operating lease, liability, including held-for-sale, noncurrent		51.9
Total lease liabilities	63.2	65.9
Asset impairment charge	13.5	$ 2.4
Office Building
ROU Liabilities:
Asset impairment charge	$ 12.1

Leases - Schedule of Leases Ter

Leases - Schedule of Leases Terms and Discount Rates (Details)	Dec. 29, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease, weighted average remaining lease term (years)	7 years	7 years 3 months 18 days
Operating lease, weighted average discount rate, percent	5.80%	5.40%

Leases - Other Information Rela

Leases - Other Information Related to Operating Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Leases [Abstract]
Operating cash flows from operating leases	$ 15	$ 20.6	$ 22.4
Financing cash flows from operating leases	0	1.2	1.4
ROU assets obtained in exchange for new operating lease liabilities	$ 10.4	$ 12.6	$ 10.7

Leases - Maturities of Operatin

Leases - Maturities of Operating and Financing Lease Liabilities (Details) $ in Millions	Dec. 29, 2024 USD ($)
Operating Leases
2025	$ 15.5
2026	13
2027	9.5
2028	7.7
2029	6.9
Thereafter	23.5
Total future lease payments	76.1
Less: Imputed interest	12.9
Total	$ 63.2

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($)			12 Months Ended
	Jul. 17, 2024	May 28, 2024	Dec. 29, 2024	Dec. 31, 2023	May 29, 2024
Short-term Debt [Line Items]
Long-term debt			$ 239,400,000	$ 0
Interest Rate Swap
Short-term Debt [Line Items]
Derivative, notional amount	$ 50,000,000
Derivative instruments not designated as hedging instruments, loss			400,000
The Facility | Line of Credit
Short-term Debt [Line Items]
Remaining borrowing capacity				200,000,000
Short-term borrowings				$ 0
The Facility | Line of Credit | Facility Fee
Short-term Debt [Line Items]
Commitment fee percentage (in basis points)				0.15%
The Facility | Line of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 200,000,000			$ 150,000,000
Debt instrument, term		5 years
Debt instrument, accordion feature, aggregate amount					300,000,000
Long-term debt			40,000,000
Remaining borrowing capacity			$ 110,000,000
Debt instrument, basis spread on variable rate			0.10%
The Facility | Line of Credit | Facility Fee
Short-term Debt [Line Items]
Commitment fee percentage (in basis points)			0.20%
Securitization Facility
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 150,000,000			250,000,000
Debt instrument, term		3 years
Debt instrument, accordion feature, aggregate amount					$ 350,000,000
Long-term debt			$ 199,400,000
Remaining borrowing capacity			$ 4,500,000	$ 100,600,000
Debt instrument, basis spread on variable rate			0.10%
Short-term borrowings				0
Debt instrument, interest rate, utilization			1.10%
Securitization Facility | Interest Rate Swap, Contract One
Short-term Debt [Line Items]
Derivative, notional amount	$ 50,000,000
Derivative, term of contract	12 months
Derivative, fixed interest rate	4.772%
Securitization Facility | Interest Rate Swap, Contract Two
Short-term Debt [Line Items]
Derivative, notional amount	$ 50,000,000
Derivative, term of contract	18 months
Derivative, fixed interest rate	4.468%
Securitization Facility | Interest Rate Swap
Short-term Debt [Line Items]
Derivative instruments not designated as hedging instruments, loss			$ 200,000
Derivative liability			400,000
Securitization Facility | Standby Letter of Credit Related to Workers' Compensation
Short-term Debt [Line Items]
Letters of credit outstanding			$ 46,100,000	$ 49,400,000
Interest rate			1.10%	0.90%
Securitization Facility | Facility Fee
Short-term Debt [Line Items]
Commitment fee percentage (in basis points)			0.40%	0.40%
Unsecured Uncommitted Short-term Local Credit Facilities
Short-term Debt [Line Items]
Maximum borrowing capacity			$ 3,100,000
Short-term borrowings			$ 0	$ 0

Retirement Benefits - Narrative

Retirement Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Retirement Benefits [Abstract]
Liability for nonqualified plans	$ 260.5	$ 233.8
Earnings (loss) included in SG&A expenses	29.8	32.9	$ (36.3)
Life insurance cash surrender value	258.1	230.3
Proceeds from company-owned life insurance	1.7	0	1.5
Tax-free earnings (loss) included in SG&A expenses	30.9	32.2	(36)
Net expense for retirement benefits	$ 8.6	10.9	9.4
Benefit obligation		9.7
Fair value of plan assets		8
Unfunded liability		1.7
Pension expense		$ 0.2	$ 0.4

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	Dec. 29, 2024	Aug. 28, 2023	Dec. 31, 2023	Jan. 01, 2023	Nov. 26, 2024	Nov. 09, 2022
Class of Stock [Line Items]
Common Stock repurchased (in shares)		2,971,471
Shares acquired, average cost per share (in dollars per share)		$ 16.83
Class A common stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	100,000,000		100,000,000
Common Stock repurchased (in shares)	742,163		2,496,827	474,644
Buyback of common shares	$ 10		$ 42.2	$ 7.8
Remaining authorized repurchase amount	$ 40		$ 0	$ 42.2
Shares acquired, average cost per share (in dollars per share)	$ 13.49
Class A common stock | Maximum
Class of Stock [Line Items]
Stock repurchase program, authorized amount					$ 50	$ 50
Class B common stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	10,000,000		10,000,000

Stockholders' Equity - Changes

Stockholders' Equity - Changes in Accumulated Other Comprehensive Income by Component, Net of Tax (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 01, 2022	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of year		$ 1,253.7	$ 1,254.2
Balance at end of year		1,234.6	1,253.7	$ 1,254.2
Other Expense
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)				(1.4)
Gain (Loss) on Disposal of Assets
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)				1.4
PersolKelly Pte. Ltd.
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)	$ 1.9
Foreign currency translation adjustments:
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of year		0.6	(7.4)	(25)
Other comprehensive income (loss) before classifications		(6.9)	8	(7.5)
Net current-period other comprehensive income (loss)		(7.5)	8	17.6
Balance at end of year		(6.9)	0.6	(7.4)
Foreign currency translation adjustments: | Liquidation of Subsidiary
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)		0	0	20.4
Foreign currency translation adjustments: | Equity Method Investment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)		(0.6)	0	4.7
Foreign currency translation adjustments: | PersolKelly Pte. Ltd. | Other Expense
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts reclassified from accumulated other comprehensive income (loss)				(1.9)
Pension liability adjustments:
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of year		(0.4)	(1.1)	(2.7)
Other comprehensive income (loss) before classifications		0	0.6	1.5
Amounts reclassified from accumulated other comprehensive income (loss)		0.4	0.1	0.1
Net current-period other comprehensive income (loss)		0.4	0.7	1.6
Balance at end of year		0	(0.4)	(1.1)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of year		0.2	(8.5)	(27.7)
Balance at end of year		$ (6.9)	$ 0.2	$ (8.5)

Earnings (Loss) Per Share - Com

Earnings (Loss) Per Share - Common Stock Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Earnings Per Share [Abstract]
Net earnings (loss)	$ (0.6)	$ 36.4	$ (62.5)
Less: Earnings allocated to participating securities, basic	0	(0.7)	0
Less: Earnings allocated to participating securities, diluted	0	(0.7)	0
Net earnings (loss) available to common shareholders, basic	(0.6)	35.7	(62.5)
Net earnings (loss) available to common shareholders, diluted	$ (0.6)	$ 35.7	$ (62.5)
Average common shares outstanding (millions):
Basic (in shares)	35.5	35.9	38.1
Dilutive share awards (in shares)	0	0.4	0
Diluted (in shares)	35.5	36.3	38.1
Basic earnings (loss) per share on common stock (in dollars per share)	$ (0.02)	$ 0.99	$ (1.64)
Diluted earnings (loss) per share on common stock (in dollars per share)	$ (0.02)	$ 0.98	$ (1.64)

Earnings (Loss) Per Share - Nar

Earnings (Loss) Per Share - Narrative (Details) - $ / shares shares in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0.4		0.2
Class A common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividends per share (in dollars per share)	$ 0.30	$ 0.30	$ 0.275
Class B common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividends per share (in dollars per share)	$ 0.30	$ 0.30	$ 0.275

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) $ / shares in Units, $ in Millions		1 Months Ended		12 Months Ended
	Feb. 11, 2025	Dec. 31, 2021 shares	Dec. 31, 2020 shares	Dec. 29, 2024 USD ($) period $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Jan. 01, 2023 USD ($) $ / shares	Jan. 03, 2021 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares) - Fixed provision				1,300,000
Tax benefit | $				$ 2.6	$ 1.7	$ 1.1
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, unvested | $				$ 14.5
Compensation cost not yet recognized, period for recognition				1 year 3 months 18 days
Grants in period (in dollars per share) | $ / shares				$ 20.70	$ 17.33	$ 20.16
Vested in period, fair value | $				$ 6.5	$ 3.3	$ 2.3
Granted (in shares)				651,000
Weighted average grant date fair value (in dollars per share) | $ / shares				$ 19.79	$ 18.52
Total nonvested shares (in shares)				1,061,000	784,000
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				3 years
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				4 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			4 years	1 year
Unrecognized compensation cost, unvested | $				$ 3.4
Compensation cost not yet recognized, period for recognition				1 year 3 months 18 days
Grants in period (in dollars per share) | $ / shares				$ 19.96
Vested in period, fair value | $				$ 2.6	$ 3.4	0.9
Granted (in shares)				170,000
Share-based compensation arrangement by share-based payment award, number of vesting performance periods | period				3
Weighted average grant date fair value (in dollars per share) | $ / shares				$ 18.66	$ 17.49
Total nonvested shares (in shares)				568,000	674,000
Performance Shares | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target achieved	0.76
Stock-based compensation cost
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost | $				$ 11.8	$ 9.7	$ 7.8
Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available for grants - Fixed provision				4,700,000
Maximum shares eligible to earn | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum target percentage allowed under grant				200%
2020 grant | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Granted (in shares)			115,000
Weighted average grant date fair value (in dollars per share) | $ / shares							$ 22.59
Total nonvested shares (in shares)				22,000
2021 grant | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Granted (in shares)		308,000
2022 grant | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share) | $ / shares				$ 19.07
Total nonvested shares (in shares)				165,000
2023 grant | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share) | $ / shares				$ 16.87
Total nonvested shares (in shares)				211,000
2024 grant | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share) | $ / shares				$ 19.96
Total nonvested shares (in shares)				170,000

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Status of Nonvested Restricted Stock Awards and Units (Details) - Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Restricted Stock
Nonvested, beginning balance (in shares)	784
Granted (in shares)	651
Vested (in shares)	(297)
Forfeited (in shares)	(77)
Nonvested, ending balance (in shares)	1,061	784
Weighted Average Grant Date Fair Value
Nonvested weighted average grant date fair value, beginning balance (in dollars per share)	$ 18.52
Granted (in dollars per share)	20.70	$ 17.33	$ 20.16
Vested (in dollars per share)	18.62
Forfeited (in dollars per share)	19.07
Nonvested weighted average grant date fair value, ending balance (in dollars per share)	$ 19.79	$ 18.52

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Status of Nonvested Performance Share Awards (Details) - Performance Shares shares in Thousands	12 Months Ended
	Dec. 29, 2024 $ / shares shares
Performance Shares
Nonvested, beginning balance (in shares) | shares	674
Granted (in shares) | shares	170
Vested (in shares) | shares	(136)
Forfeited (in shares) | shares	(33)
Vesting Adjustment (in shares) | shares	(107)
Nonvested, ending balance (in shares) | shares	568
Weighted Average Grant Date Fair Value
Nonvested weighted average grant date fair value, beginning balance (in dollars per share) | $ / shares	$ 17.49
Granted (in dollars per share) | $ / shares	19.96
Vested (in dollars per share) | $ / shares	18.88
Forfeited (in dollars per share) | $ / shares	17.99
Vesting Adjustment (in dollars per share) | $ / shares	16.52
Nonvested weighted average grant date fair value, ending balance (in dollars per share) | $ / shares	$ 18.66

Sale of Assets - Narrative (Det

Sale of Assets - Narrative (Details) - USD ($) $ in Millions

1 Months Ended

3 Months Ended

12 Months Ended

Oct. 31, 2022

Jun. 30, 2022

Jan. 31, 2022

Sep. 29, 2024

Jun. 30, 2024

Jan. 01, 2023

Jul. 03, 2022

Apr. 03, 2022

Jul. 04, 2021

Dec. 29, 2024

Dec. 31, 2023

Jan. 01, 2023

Jun. 10, 2024

Sale of Assets [Abstract]

Disposal group, including discontinued operation, consideration

$ 7.5

Proceeds from sale of other productive assets

$ 4.5

Disposal group, including discontinued operation, assets, current

$ 1

Gain on sale of assets

$ 0.1

$ 5.4

$ 0

$ 6.2

Purchase price for real property

$ 6

$ 0.9

Proceeds from sale of property held-for-sale

$ 5.6

$ 0.9

Real estate held-for-sale

$ 4.7

Gain (loss) on sale of properties

$ 0.9

$ 4.4

$ 0.9

Purchase price for land

$ 4.5

Proceeds from sale of land held-for-investment

$ 3.6

$ 0.8

Other Income (Expense), Net - S

Other Income (Expense), Net - Schedule of Other Income (Expense), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Other Income and Expenses [Abstract]
Interest income	$ 6.8	$ 6.7	$ 2.3
Interest expense	(10.9)	(3.2)	(2.1)
Foreign exchange gains (losses)	0.5	(1.5)	4.8
Other	(3.2)	(1.4)	(3.4)
Other income (expense), net	$ (6.8)	$ 0.6	$ 1.6

Other Income (Expense), Net - N

Other Income (Expense), Net - Narrative (Details) - USD ($) $ in Millions	2 Months Ended	3 Months Ended	12 Months Ended
	Feb. 15, 2022	Apr. 03, 2022	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Other Income and Expense [Line Items]
Interest income, money market deposits			$ 3	$ 3
Gain on foreign currency remeasurement			0	0	$ 5.5
Equity securities gain (loss)	$ (52.4)		3.8
Disposition, increase (decrease) in indemnification liabilities			(0.7)
Motion Recruitment Partners, LLC (MRP)
Other Income and Expense [Line Items]
Business combination, acquisition related costs			8.6
Write-off of earnout liability			$ 3.4
Kelly Services Japan, Inc.
Other Income and Expense [Line Items]
Gain on foreign currency remeasurement		$ 5.5			$ 5.5
Business Talent Group, LLC
Other Income and Expense [Line Items]
Proceeds from (investment in) equity securities, investing activities				$ 2

Income Taxes - Earnings (Loss)

Income Taxes - Earnings (Loss) From Continuing Operations Before Taxes Per Jurisdiction (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Income Tax Disclosure [Abstract]
Domestic	$ (33.2)	$ 29.9	$ (39.4)
Foreign	11.3	(5)	(31.8)
Earnings (loss) before taxes and equity in net earnings of affiliate	$ (21.9)	$ 24.9	$ (71.2)

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes From Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Current tax expense:
U.S. federal	$ (0.7)	$ 1	$ 1.3
U.S. state and local	(0.8)	2.5	1.4
Foreign	8	9.9	61.5
Total current	6.5	13.4	64.2
Deferred tax (benefit) expense:
U.S. federal	(24.9)	(36.8)	(2.5)
U.S. state and local	(2.6)	(3.6)	0.7
Foreign	(0.3)	15.5	(70.3)
Total deferred	(27.8)	(24.9)	(72.1)
Total provision	$ (21.3)	$ (11.5)	$ (7.9)

Income Taxes - Deferred Taxes (

Income Taxes - Deferred Taxes (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Components of Deferred Tax Assets and Liabilities
Fixed assets and right-of-use assets	$ (15.2)	$ (19)
Intangible assets and goodwill	0.1	19
Employee compensation and benefit plans	77	71.5
Outside basis difference on held for sale assets	0	34.7
Operating lease liabilities	17.7	18.3
Net operating loss carryforwards	10.9	36.7
Capital loss carryforward	19.6	0
Credit carryforwards	230.6	208.7
Other, net	23.6	15.4
Valuation allowance	(34.2)	(60.5)
Net deferred tax assets	$ 330.1	$ 324.8

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Income Taxes [Line Items]
Deferred tax assets, net	$ 330.1	$ 324.8
Capital loss carryforward	19.6	0
Valuation allowance	34.2	60.5
Income tax expense (benefit)	(21.3)	(11.5)	$ (7.9)
Tax exempt life insurance cash surrender	6.2	6.5	7.8
Undistributed earnings of foreign subsidiaries	65.6
Unrecognized tax benefits	0.5	0.6	0.5	$ 0.6
Unrecognized tax benefits that would impact effective tax rate	0.4	0.5	0.4
Unrecognized tax benefits, income tax penalties and interest expense		0.1
Unrecognized tax benefits, income tax penalties and interest accrued	0.2	0.2
European Staffing Operations
Income Taxes [Line Items]
Valuation allowance, deferred tax asset, increase (decrease), amount	24.4	21.4
Capital loss carryforward	19.2	19.6
Expires in 2029
Income Taxes [Line Items]
Operating loss carryforwards	30.5
Deferred tax assets, operating loss carryforwards, subject to expiration	19.6
Expire Between 2025 and 2044
Income Taxes [Line Items]
Operating loss carryforwards	10.9
Deferred tax assets, operating loss carryforwards, subject to expiration	1.8
Deferred tax assets, operating loss carryforwards, not subject to expiration	9.1
Pro Forma
Income Taxes [Line Items]
Potential repatriation of foreign earnings amount	4.7
Persol Holdings Investment
Income Taxes [Line Items]
Income tax expense (benefit)			(16.9)
Assets Held-For-Sale
Income Taxes [Line Items]
Income tax expense (benefit)		(15)
Goodwill
Income Taxes [Line Items]
Income tax expense (benefit)	(18.5)		$ (7.1)
U.S. Foreign Tax Credits
Income Taxes [Line Items]
Valuation allowance	15	14.5
General Business Tax Credit Carryforward | Expiring In Years 2034 to 2044
Income Taxes [Line Items]
General business credit carryforward	197.3
Foreign Tax Credit Carryforward | Expiring In Years 2026 to 2034
Income Taxes [Line Items]
General business credit carryforward	$ 33.2
Deferred Tax
Income Taxes [Line Items]
Deferred tax assets, net		321.1
Assets Held-For-Sale
Income Taxes [Line Items]
Deferred tax assets, net		4.1
Other Noncurrent Liabilities
Income Taxes [Line Items]
Deferred tax assets, net		$ 0.4

Income Taxes - Differences Betw

Income Taxes - Differences Between Income Taxes From Continuing Operations and U.S. Statutory Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Income Tax Disclosure [Abstract]
U.S. statutory rate	21%	21%	21%
Income tax based on statutory rate	$ (4.6)	$ 5.2	$ (14.9)
State income taxes, net of federal benefit	(2.7)	(0.9)	1.6
Foreign tax rate differential	0.9	4.6	1.6
U.S. work opportunity credits	(7.8)	(8.5)	(10.7)
Life insurance cash surrender value	(6.2)	(6.5)	7.8
Foreign items	0.3	3	0.1
Foreign-derived intangible income deduction	(3)	(2.3)	(2.3)
Sale of foreign subsidiaries	0.4	0	3.9
Foreign business taxes	0	1.1	1.8
Change in deferred tax realizability	(0.4)	4.4	0
Non-deductible expenses	2.1	0.7	0
Uncertain tax positions	0	(0.3)	0.1
Stock compensation	0.4	0.7	0.6
Outside basis difference on held for sale assets	0	(13.1)	0
MRP earnout liability revaluation	(0.7)	0	0
Non-deductible goodwill impairment	0	0	2.7
Other	0	0.4	(0.2)
Total provision	$ (21.3)	$ (11.5)	$ (7.9)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of the year	$ 0.6	$ 0.5	$ 0.6
Additions for prior years’ tax positions	0	0.3	0
Reductions for prior years’ tax positions	0	0	0
Additions for settlements	0	0	0
Reductions for settlements	0	0	0
Reductions for expiration of statutes	(0.1)	(0.2)	(0.1)
Balance at end of the year	$ 0.5	$ 0.6	$ 0.5

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Changes In Operating Assets And Liabilities, Net of Acquisitions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Supplemental Cash Flow Elements [Abstract]
(Increase) decrease in trade accounts receivable	$ (20.9)	$ 147.2	$ (99.3)
(Increase) decrease in prepaid expenses and other assets	2.8	(10.7)	(24.6)
(Increase) decrease in ROU assets	0.2	(2.2)	(0.1)
Increase (decrease) in accounts payable and accrued liabilities	(31.1)	(62.5)	44.3
Increase (decrease) in operating lease liabilities	(12.1)	(14.3)	(18.7)
Increase (decrease) in accrued payroll and related taxes	(13.6)	(59.8)	(59.3)
Increase (decrease) in accrued workers’ compensation and other claims	0.7	0.3	(5.2)
Increase (decrease) in income and other taxes	(3.2)	0	21.9
Total changes in operating assets and liabilities, net of acquisitions	$ (77.2)	$ (2)	$ (141)

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 10	$ 2.8	$ 1.3
Income taxes paid	10.9	8.9	61.2
Non-cash capital expenditures	$ 1.6	$ 0.4	$ 1.2

Commitments- Narrative (Details

Commitments- Narrative (Details) $ in Millions	Dec. 29, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Noncancelable purchase obligations	$ 72.5

Contingencies - Narrative (Deta

Contingencies - Narrative (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Accrual for litigation costs	$ 1.5	$ 6.4
Insurance recoveries	4.9	11.7
Disposal Group, Held-for-Sale, Not Discontinued Operations | European Staffing Operations
Loss Contingencies [Line Items]
Disposal group, including discontinued operations, loss contingency accrual		1.5
Prepaid Expenses and Other Current Assets
Loss Contingencies [Line Items]
Insurance recoveries	0	$ 0.2
Minimum
Loss Contingencies [Line Items]
Loss contingency, portion not accrued	0.1
Maximum
Loss Contingencies [Line Items]
Loss contingency, portion not accrued	$ 1.2

Segment Disclosures - Narrative

Segment Disclosures - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 29, 2024 USD ($) numberOfSegments	Dec. 31, 2023 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable segments | numberOfSegments	4
Long-Lived Assets	$ 72.9	$ 90
Disposal Group, Held-for-Sale, Not Discontinued Operations | European Staffing Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets		$ 18.4

Segment Disclosures - Segment R

Segment Disclosures - Segment Revenue Per Service (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Service
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment revenue from services	$ 4,331.8	$ 4,835.7	$ 4,965.4

Segment Disclosures - Schedule

Segment Disclosures - Schedule of Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	$ 4,331.8	$ 4,835.7	$ 4,965.4
Cost of services	3,449.2	3,874.3	3,953.6
SG&A expenses	708.5	831.4	874.1
SG&A expenses	818.4	934.7	943.5
Goodwill impairment charge	72.8	0	41
Asset impairment charge	(13.5)	(2.4)
Business unit profit (loss)	101.3	127.6	96.7
Earnings (loss) from operations	(15.1)	24.3	14.8
Loss on disposal	0	0	(18.7)
Gain on sale of assets	5.4	0	6.2
Gain on sale of EMEA staffing operations	1.6	0	0
Amortization of intangible assets	(51.5)	(40.1)	(37.1)
Loss on investment in Persol Holdings	0	0	(67.2)
Loss on currency translation from liquidation of subsidiary			(20.4)
Other income (expense), net	(6.8)	0.6	1.6
Earnings (loss) before taxes and equity in net earnings of affiliate	(21.9)	24.9	(71.2)
Science, Engineering & Technology
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	1,422.8	1,190.8	1,265.4
Goodwill impairment charge	72.8	0
Education
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Goodwill impairment charge	0	0
Outsourcing & Consulting
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	468.3	454.7	468
International
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	0	812.1	887
Reporting Segments | Professional & Industrial
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	1,470.7	1,539.5	1,709.9
Cost of services	1,209.4	1,262.4	1,396.8
Direct salaries	141.2	163.5	185.1
Other segment expenses	85.4	97.3	108.4
SG&A expenses	226.6	260.8	293.5
Goodwill impairment charge	0		0
Asset impairment charge		(0.3)
Business unit profit (loss)	34.7	16	19.6
Reporting Segments | Science, Engineering & Technology
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	1,422.8	1,190.8	1,265.4
Cost of services	1,087.2	918.8	968.4
Direct salaries	170.5	127.1	141.7
Other segment expenses	75.3	69.8	76.3
SG&A expenses	245.8	196.9	218
Goodwill impairment charge	72.8		0
Asset impairment charge		(0.1)
Business unit profit (loss)	17	75	79
Reporting Segments | Education
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	972.3	841.9	636.2
Cost of services	832.5	713.2	535.9
Direct salaries	60.5	59.6	50.8
Other segment expenses	35.4	32.8	30.7
SG&A expenses	95.9	92.4	81.5
Goodwill impairment charge	0		0
Asset impairment charge		0
Business unit profit (loss)	43.9	36.3	18.8
Reporting Segments | Outsourcing & Consulting
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	468.3	454.7	468
Cost of services	322.4	291.2	298.4
Direct salaries	104.3	116.6	114.8
Other segment expenses	35.9	42.7	39.8
SG&A expenses	140.2	159.3	154.6
Goodwill impairment charge	0		41
Asset impairment charge		(2)
Business unit profit (loss)	5.7	2.2	(26)
Reporting Segments | International
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	0	812.1	887
Cost of services		692	755.2
Direct salaries		83.6	85.1
Other segment expenses		38.4	41.4
SG&A expenses		122	126.5
Goodwill impairment charge			0
Asset impairment charge		0
Business unit profit (loss)		(1.9)	5.3
Less: Intersegment revenue
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue from services	(2.3)	(3.3)	(1.1)
Cost of services	(2.3)	(3.3)	(1.1)
SG&A expenses	0	0	0
Goodwill impairment charge	0		0
Asset impairment charge		0
Business unit profit (loss)	0	0	0
Corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
SG&A expenses	$ (58.4)	$ (63.2)	$ (32.3)

Segment Disclosures - Depreciat

Segment Disclosures - Depreciation and Amortization Expense Included in SG&A Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	$ 40.2	$ 33.9	$ 33.4
Professional & Industrial | Reporting Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	9.5	8	7.7
Science, Engineering & Technology | Reporting Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	26.1	16.1	15.4
Education | Reporting Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	8.3	7.7	6.2
Outsourcing & Consulting | Reporting Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	7.6	5.9	4.8
International | Reporting Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and amortization	$ 0	$ 2.4	$ 2.7

Segment Disclosures - Summary o

Segment Disclosures - Summary of Revenue From Services by Geographic Area (Details) - Service - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	$ 4,331.8	$ 4,835.7	$ 4,965.4
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	3,876.9	3,555.8	3,671.5
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	$ 454.9	$ 1,279.9	$ 1,293.9

Segment Disclosures - Summary_2

Segment Disclosures - Summary of Long-Lived Assets By Geographic Area (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 72.9	$ 90
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	70.1	68.4
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 2.8	$ 21.6

Related Party Transactions - Na

Related Party Transactions - Narrative (Details)	Dec. 29, 2024
Class B common stock | Terence E. Adderley Revocable Trust K
Related Party Transaction [Line Items]
Ownership percentage of parent company	95.30%

Schedule II - Valuation Reser_2

Schedule II - Valuation Reserves (Details) - Valuation Reserves - Deferred tax assets valuation allowance - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 60.5	$ 34	$ 19
Charged to costs and expenses	0.6	40.9	15.8
Charged to other accounts	(24.4)	0	0
Currency exchange effects	0	0.6	(0.7)
Deductions from reserves	(2.5)	(15)	(0.1)
Balance at end of year	$ 34.2	$ 60.5	$ 34