Discontinued Operations - Major Components of Net Income from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net (loss) income from discontinued operations, net of income taxes	$ (0.3)	$ 2.8	$ 26.3	$ 7.5
Revenue, net	517.5	472.1	1,448.5	1,355.4
Income tax expense	3.4	7.1	(1.3)	7.9
Discontinued Operations, Disposed of by Sale | S&D Disposition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, net	0.0	145.4	97.1	443.4
Cost of sales	0.0	105.5	71.1	322.2
Operating income (loss) from discontinued operations	0.0	3.2	(0.5)	9.7
(Loss) gain on sale of discontinued operations	(0.4)	0.0	54.5	0.0
Net (loss) income from discontinued operations, before income taxes	(0.4)	3.2	53.9	9.6
Income tax (benefit) expense	(0.1)	0.4	27.6	2.1
Net (loss) income from discontinued operations, net of income taxes	$ (0.3)	2.8	26.3	7.5
Income tax expense			27.9
Discontinued Operations, Disposed of by Sale | S&D Disposition | Related Party
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, net		$ 1.4	$ 1.0	$ 4.5