Condensed Consolidated and Combined Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Income Statement [Abstract]
Sales	$ 362.0	$ 712.1	$ 909.2	$ 1,371.8
Cost of sales	211.5	318.5	480.3	615.1
Gross profit	150.5	393.6	428.9	756.7
Operating expenses:
Selling, general and administrative	241.9	278.0	510.6	552.9
Research and development	16.5	39.7	51.2	83.0
Operating (loss) profit	(107.9)	75.9	(132.9)	120.8
Nonoperating income (expense):
Other income	0.1	1.3	0.2	1.4
Interest expense, net	(14.5)	0.0	(17.8)	0.0
(Loss) income before income taxes	(122.3)	77.2	(150.5)	122.2
Income tax (benefit) expense	(28.8)	15.7	(39.8)	22.8
Net (loss) income	$ (93.5)	$ 61.5	$ (110.7)	$ 99.4
(Loss) earnings per share:
Basic and diluted (in USD per share)	$ (0.59)	$ 0.48	$ (0.69)	$ 0.78
Average common stock and common equivalent shares outstanding:
Basic and diluted (in shares)	159.5	127.9	159.3	127.9