Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Name:	us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Income Taxes [Line Items]
Income tax expense (benefit)	$ 0.9	$ 12.7	$ (35.3)	$ 19.1
Outside basis difference	(7.7)
Increase (decrease) in valuation allowance		(10.4)
Persol Holdings
Income Taxes [Line Items]
Income tax expense (benefit)	$ 9.1	$ 18.7	(14.8)	$ 22.8
Goodwill
Income Taxes [Line Items]
Income tax expense (benefit)			$ (23.0)