Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Income Statement [Abstract]
Net sales	[1]	$ 1,219.1	$ 1,149.0	$ 2,560.1	$ 2,323.5
Cost of sales		784.4	718.2	1,642.2	1,443.9
Gross profit		434.7	430.8	917.9	879.6
Operating expenses
Distribution		23.6	23.7	47.8	47.1
Research and development		47.1	43.9	89.0	84.0
Selling		127.6	140.1	275.3	288.7
Administration		118.8	127.2	241.4	252.3
Impairment charges		0.0	27.8	0.0	31.9
Restructuring		1.1	12.2	1.1	21.5
Other operating expense (income)		(0.9)	0.9	0.2	(3.2)
Total operating expenses		317.3	375.8	654.8	722.3
Operating income		117.4	55.0	263.1	157.3
Change in financial assets		(2.1)	(5.5)	(3.7)	(15.9)
Interest expense, net		33.4	31.2	63.6	59.8
Other (income) expense, net		14.3	2.3	16.7	5.5
Income before income taxes		71.8	27.0	186.5	107.9
Income tax expense		11.2	18.0	19.5	35.0
Net income		$ 60.6	$ 9.0	$ 167.0	$ 72.9
Earnings per share
Basic (in dollars per share)		$ 0.44	$ 0.07	$ 1.23	$ 0.54
Diluted (in dollars per share)		$ 0.44	$ 0.07	$ 1.22	$ 0.54
Weighted-average shares outstanding
Basic (in shares)		136.4	136.0	136.3	136.0
Diluted (in shares)		137.5	136.5	137.3	136.3

[1] Derived from the location of the entity that sells to a third party.