Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023
Income Statement [Abstract]
Sales	$ 601.0	$ 631.3	$ 1,857.7	$ 1,920.9
Cost of sales	283.7	268.0	857.5	816.3
Gross profit	317.3	363.3	1,000.2	1,104.6
Operating expenses:
Selling, general and administrative	270.9	257.7	858.3	796.7
Research and development	25.5	22.3	72.4	73.6
Goodwill and intangible asset impairments	0.0	0.0	1,153.8	0.0
Operating profit (loss)	20.9	83.3	(1,084.3)	234.3
Nonoperating (expense) income:
Other income (expense), net	0.6	(32.1)	(0.4)	(24.7)
Interest expense, net	(11.9)	(15.4)	(36.5)	(49.5)
Income (loss) before income taxes	9.6	35.8	(1,121.2)	160.1
Income tax expense (benefit)	1.4	14.3	(1.4)	42.9
Net income (loss)	$ 8.2	$ 21.5	$ (1,119.8)	$ 117.2
Earnings (loss) per share:
Earnings (loss) - basic (in USD per share)	$ 0.05	$ 0.13	$ (6.51)	$ 0.71
Earnings (loss) - diluted (in USD per share)	$ 0.05	$ 0.12	$ (6.51)	$ 0.66
Average common stock and common equivalent shares outstanding:
Basic (in shares)	172.2	168.2	172.1	165.3
Diluted (in shares)	172.9	175.2	172.1	176.3