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	0.0
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)		(15.0)
Goodwill
Income Taxes [Line Items]
Income tax expense (benefit)	(18.5)		$ (7.1)
U.S. Foreign Tax Credits
Income Taxes [Line Items]
Valuation allowance	15.0	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