Segment Disclosures - Depreciation and Amortization Expense Included in SG&A Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021
Earnings (loss) from Operations
Depreciation and amortization			$ 16.1	$ 14.1
Professional & Industrial
Earnings (loss) from Operations
Depreciation and amortization	$ 1.0	$ 1.4	2.1	2.8
Science, Engineering & Technology
Earnings (loss) from Operations
Depreciation and amortization	3.2	3.3	6.3	4.3
Education
Earnings (loss) from Operations
Depreciation and amortization	1.3	0.9	2.1	1.9
Outsourcing & Consulting
Earnings (loss) from Operations
Depreciation and amortization	1.0	0.2	1.2	0.4
International
Earnings (loss) from Operations
Depreciation and amortization	$ 0.5	$ 0.5	$ 1.0	$ 1.0