Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Income Statement [Abstract]
Net sales	$ 1,042.7	$ 1,003.0	$ 3,033.8	$ 3,035.0
Cost of sales	706.3	633.3	1,980.0	1,924.5
Gross profit	336.4	369.7	1,053.8	1,110.5
Operating expenses
Distribution	23.3	22.5	69.0	62.4
Research and development	27.6	30.4	91.7	88.7
Selling	129.7	130.1	405.0	389.0
Administration	130.6	111.3	368.1	345.2
Impairment charges	3.5	0.0	162.1	0.0
Restructuring	1.0	0.8	11.8	1.5
Other operating expense (income)	(417.6)	(3.9)	(417.6)	(3.9)
Total operating expenses	(101.9)	291.2	690.1	882.9
Operating income	438.3	78.5	363.7	227.6
Change in financial assets	0.0	(22.2)	0.0	(25.9)
Interest expense, net	30.9	33.3	94.5	94.3
Other (income) expense, net	18.5	(1.0)	20.4	17.9
Loss on extinguishment of debt	0.0	20.0	0.0	20.0
Income (loss) from continuing operations before income taxes	388.9	48.4	248.8	121.3
Income tax expense (benefit)	442.8	22.0	411.8	24.9
Income (loss) from continuing operations	(53.9)	26.4	(163.0)	96.4
Income (loss) from discontinued operations, net of tax	(5.0)	(181.0)	84.5	(84.0)
Net income (loss)	$ (58.9)	$ (154.6)	$ (78.5)	$ 12.4
Basic
Continuing operations (in dollars per share)	$ (0.40)	$ 0.19	$ (1.22)	$ 0.71
Discontinued operations (in dollars per share)	(0.04)	(1.32)	0.63	(0.62)
Basic earnings per share (in dollars per share)	(0.44)	(1.13)	(0.59)	0.09
Diluted
Continuing operations (in dollars per share)	(0.40)	0.19	(1.22)	0.70
Discontinued operations (in dollars per share)	(0.04)	(1.31)	0.63	(0.61)
Diluted earnings per share (in dollars per share)	$ (0.44)	$ (1.12)	$ (0.59)	$ 0.09
Weighted-average shares outstanding
Basic (in shares)	133.8	136.5	133.5	136.3
Diluted (in shares)	133.8	137.6	133.5	137.5