Goodwill and Intangible Assets - Finite Lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021
Finite-Lived Intangible Assets [Line Items]
Less: Accumulated Amortization	$ 30.1	$ 17.1
Intangible Assets, Gross Carrying Amount	152.1	72.7
Intangible Assets, Net	$ 122.0	55.6
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	4 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	15 years
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years
Gross Carrying amount	$ 106.9	52.0
Less: Accumulated Amortization	22.2	13.1
Net	$ 84.7	38.9
Candidate Database
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	4 years
Gross Carrying amount	$ 1.5	1.5
Less: Accumulated Amortization	1.5	1.3
Net	0.0	0.2
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying amount	35.8	12.7
Less: Accumulated Amortization	4.2	1.6
Net	$ 31.6	11.1
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
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Gross Carrying amount	$ 3.1	1.7
Less: Accumulated Amortization	1.2	0.6
Net	$ 1.9	1.1
Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years
Gross Carrying amount	$ 4.8	4.8
Less: Accumulated Amortization	1.0	0.5
Net	$ 3.8	$ 4.3