Condensed Consolidated and Combined Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Income Statement [Abstract]
Sales	$ 547.2	$ 659.7
Cost of sales	268.8	296.6
Gross profit	278.4	363.1
Operating expenses:
Selling, general and administrative	268.7	274.9
Research and development	34.7	43.3
Operating (loss) profit	(25.0)	44.9
Nonoperating income (expense):
Other income	0.1	0.1
Interest expense, net	(3.3)	0.0
(Loss) income before income taxes	(28.2)	45.0
Income tax (benefit) expense	(11.0)	7.1
Net (loss) income	$ (17.2)	$ 37.9
(Loss) earnings per share:
Basic and diluted (in USD per share)	$ (0.11)	$ 0.30
Average common stock and common equivalent shares outstanding:
Basic and diluted (in share)	159.2	127.9