Discontinued Operations - Operating Results (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Oct. 01, 2021	Oct. 02, 2020	Oct. 01, 2021	Oct. 02, 2020
Operating expenses:
Income (loss) from discontinued operations, net of tax (refer to Note 3)	$ 12.7	$ 12.0	$ 33.7	$ (26.5)
Discontinued Operations, Disposed of by Sale \| Plamenca
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	102.5	93.3	302.0	236.8
Cost of sales	57.2	61.1	174.4	182.1
Gross profit	45.3	32.2	127.6	54.7
Operating expenses:
Selling, general and administrative	25.2	22.0	70.4	78.1
Research and development	3.8	2.4	12.5	10.1
Operating profit (loss)	16.3	7.8	44.7	(33.5)
Income tax expense (benefit)	3.6	(4.2)	11.0	(7.0)
Income (loss) from discontinued operations, net of tax (refer to Note 3)	$ 12.7	$ 12.0	$ 33.7	$ (26.5)

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