Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Income Taxes [Line Items]
Income tax expense (benefit)	$ 10.5	$ (36.2)
Mexico
Income Taxes [Line Items]
Deferred tax asset	4.2
Persol Holdings
Income Taxes [Line Items]
Income tax expense (benefit)	$ 9.2	(23.8)
Goodwill
Income Taxes [Line Items]
Income tax expense (benefit)		$ (23.0)