Goodwill - Changes in the Net Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Jul. 03, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 114.8
Additions to Goodwill	77.3
Impairment Adjustments	0.0
Goodwill, ending balance	192.1
Science, Engineering & Technology
Goodwill [Roll Forward]
Goodwill, beginning balance	111.3
Additions to Goodwill	0.0
Impairment Adjustments	0.0
Goodwill, ending balance	111.3
Education
Goodwill [Roll Forward]
Goodwill, beginning balance	3.5
Additions to Goodwill	36.3
Impairment Adjustments	0.0
Goodwill, ending balance	39.8
Outsourcing & Consulting
Goodwill [Roll Forward]
Goodwill, beginning balance	0.0
Additions to Goodwill	41.0
Impairment Adjustments	0.0
Goodwill, ending balance	$ 41.0