Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024
Income Statement [Abstract]
Sales	$ 669.9	$ 601.0	$ 1,968.9	$ 1,857.7
Cost of sales	299.7	283.7	892.8	857.5
Gross profit	370.2	317.3	1,076.1	1,000.2
Operating expenses:
Selling, general and administrative	284.4	270.9	851.4	858.3
Research and development	28.3	25.5	81.9	72.4
Goodwill and intangible asset impairments	0.0	0.0	0.0	1,153.8
Operating profit (loss)	57.5	20.9	142.8	(1,084.3)
Nonoperating (expense) income:
Nonoperating other income, net	1.4	0.6	3.1	(0.4)
Interest expense, net	(9.0)	(11.9)	(26.3)	(36.5)
Income (loss) before income taxes	49.9	9.6	119.6	(1,121.2)
Income tax expense (benefit)	80.2	1.4	105.5	(1.4)
Net (loss) income	$ (30.3)	$ 8.2	$ 14.1	$ (1,119.8)
(Loss) earnings per share:
(Loss) Earnings - basic (in USD per share)	$ (0.18)	$ 0.05	$ 0.08	$ (6.51)
(Loss) Earnings - diluted (in USD per share)	$ (0.18)	$ 0.05	$ 0.08	$ (6.51)
Average common stock and common equivalent shares outstanding:
Basic (in shares)	166.1	172.2	169.2	172.1
Diluted (in shares)	166.1	172.9	170.3	172.1