Segment and Related Information, Reconciliation of Income from Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Segment and Related Information [Abstract]
Income from operations	$ 63.7	$ 27.2	$ 122.5	$ 84.9
Acquisition-related expenses	(0.4)	0.0	(0.4)	0.0
Litigation expenses	0.0	(8.3)	0.0	(8.9)
Non-operating deductions, net	(11.4)	(12.6)	(20.8)	(21.3)
Income from operations before tax and equity in earnings	52.3	14.6	101.7	63.6
Reportable Segments [Member]
Segment and Related Information [Abstract]
Income from operations	66.4	37.3	129.3	96.1
Unallocated and Other Corporate Expenses [Member]
Segment and Related Information [Abstract]
Income from operations	$ (2.3)	$ (1.8)	$ (6.4)	$ (2.3)