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Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Income Tax Disclosure [Abstract]
Federal statutory tax expense	$ 30.7	$ 16.4	$ 11.4
State taxes, net of federal tax effect	5.6	3.7	2.4
Credit for research activities	(4.2)	(4.0)	(3.9)
Valuation allowance	(7.1)	(0.2)	1.3
Goodwill impairment	0.0	0.1	1.5
Executive compensation limitation	1.4	1.2	0.5
Sale of foreign subsidiary	(4.2)	0.0	0.0
Other – net	0.3	1.2	(0.7)
Total income tax expense	$ 22.5	$ 18.5	$ 12.5

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

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