Segment Disclosures - Depreciation and Amortization Expense Included in SG&A Expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Earnings (loss) from Operations
Depreciation and amortization			$ 25.6	$ 24.7
Professional & Industrial
Earnings (loss) from Operations
Depreciation and amortization	$ 0.8	$ 0.8	2.5	2.9
Science, Engineering & Technology
Earnings (loss) from Operations
Depreciation and amortization	3.1	3.2	9.4	9.5
Education
Earnings (loss) from Operations
Depreciation and amortization	1.6	1.6	4.7	3.7
Outsourcing & Consulting
Earnings (loss) from Operations
Depreciation and amortization	1.0	1.0	3.0	2.2
International
Earnings (loss) from Operations
Depreciation and amortization	$ 0.4	$ 0.3	$ 1.2	$ 1.3