Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 30, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	[1]	$ 1,174.5	$ 1,217.0
Cost of sales		725.7	724.3
Gross profit		448.8	492.7
Operating expenses
Distribution		23.3	24.7
Research and development		40.2	38.4
Selling		148.6	161.3
Administration		125.1	107.6
Impairment charges		4.1	0.0
Restructuring charges		9.3	1.5
Other operating expense (income)		(4.1)	2.9
Total operating expenses		346.5	336.4
Operating income		102.3	156.3
Change in financial assets		(10.4)	9.6
Interest expense, net		28.6	31.4
Other (income) expense, net		3.2	4.3
Loss on extinguishment of debt		0.0	0.5
Income before income taxes		80.9	110.5
Income tax expense		17.0	29.7
Net income		$ 63.9	$ 80.8
Earnings per share
Basic (in dollars per share)		$ 0.47	$ 0.57
Diluted (in dollars per share)		$ 0.47	$ 0.57
Weighted-average shares outstanding
Basic (in shares)		135.9	140.8
Diluted (in shares)		136.2	141.4

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