Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 28, 2020	Mar. 30, 2019
Income Statement [Abstract]
Net sales	[1]	$ 1,341.0	$ 1,174.5
Cost of sales		857.8	725.7
Gross profit		483.2	448.8
Operating expenses
Distribution		24.2	23.3
Research and development		41.9	40.2
Selling		147.7	148.6
Administration		122.6	125.1
Impairment charges		0.0	4.1
Restructuring		0.0	9.3
Other operating expense (income)		1.1	(4.1)
Total operating expenses		337.5	346.5
Operating income		145.7	102.3
Change in financial assets		(1.6)	(10.4)
Interest expense, net		30.2	28.6
Other (income) expense, net		2.4	3.2
Income before income taxes		114.7	80.9
Income tax expense		8.3	17.0
Net income		$ 106.4	$ 63.9
Earnings per share
Basic (in dollars per share)		$ 0.78	$ 0.47
Diluted (in dollars per share)		$ 0.77	$ 0.47
Weighted-average shares outstanding
Basic (in shares)		136.2	135.9
Diluted (in shares)		137.3	136.2

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