Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	[1]	$ 4,837.4	$ 4,731.7	$ 4,946.2
Cost of sales		3,064.1	2,900.2	2,966.7
Gross profit		1,773.3	1,831.5	1,979.5
Operating expenses
Distribution		96.1	94.2	87.0
Research and development		187.4	218.6	167.7
Selling		567.0	595.7	598.4
Administration		503.0	435.9	461.1
Impairment charges		184.5	224.4	47.5
Restructuring		26.3	21.0	61.0
Other operating expense (income)		4.2	5.2	(41.4)
Total operating expenses		1,568.5	1,595.0	1,381.3
Operating income		204.8	236.5	598.2
Change in financial assets		(22.1)	(188.7)	24.9
Interest expense, net		121.7	128.0	168.1
Other (income) expense, net		(66.0)	6.1	(10.1)
Loss on extinguishment of debt		0.2	0.5	135.2
Income before income taxes		171.0	290.6	280.1
Income tax expense (benefit)		24.9	159.6	160.5
Net income		$ 146.1	$ 131.0	$ 119.6
Earnings per share
Basic (in dollars per share)		$ 1.07	$ 0.95	$ 0.84
Diluted (in dollars per share)		$ 1.07	$ 0.95	$ 0.84
Weighted-average shares outstanding
Basic (in dollars per share)		136.0	137.8	142.3
Diluted (in dollars per shares)		136.5	138.3	142.6

[1] The net sales by geography is derived from the location of the entity that sells to a third party.