Condensed Consolidated and Combined Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Income Statement [Abstract]
Sales	$ 640.5	$ 659.3	$ 1,549.7	$ 2,031.1
Cost of sales	299.8	292.3	780.1	907.4
Gross profit	340.7	367.0	769.6	1,123.7
Operating expenses:
Selling, general and administrative	248.8	252.0	759.4	804.9
Research and development	22.5	36.3	73.7	119.3
Operating profit (loss)	69.4	78.7	(63.5)	199.5
Nonoperating income (expense):
Other income	0.2	0.2	0.4	1.6
Interest expense, net	(23.4)	(0.2)	(41.2)	(0.2)
Income (loss) before income taxes	46.2	78.7	(104.3)	200.9
Income tax expense (benefit)	10.6	16.6	(29.2)	39.4
Net income (loss)	$ 35.6	$ 62.1	$ (75.1)	$ 161.5
Earnings (loss) per share:
Basic (in USD per share)	$ 0.22	$ 0.48	$ (0.47)	$ 1.25
Diluted (in USD per share)	$ 0.22	$ 0.48	$ (0.47)	$ 1.25
Average common stock and common equivalent shares outstanding:
Basic (in shares)	159.7	130.6	159.4	128.8
Diluted (in shares)	163.9	130.6	159.4	128.8