Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 711.4	$ 687.6	$ 2,224.6	$ 2,124.9
Cost of goods sold	467.6	451.1	1,444.9	1,391.1
Gross profit	243.8	236.5	779.7	733.8
Selling, general and administrative	116.3	116.8	399.0	386.2
Research and development	19.1	17.9	57.0	54.7
Operating income	108.4	101.8	323.7	292.9
Other (income) expense:
Loss on sale of business	0.2	3.8	6.4	3.8
Loss on early extinguishment of debt	0.0	0.0	17.1	101.4
Net interest expense	4.3	13.9	27.9	74.2
Other Income			(1.7)
Other expense	2.1	1.1		3.2
Income from continuing operations before income taxes	101.8	83.0	274.0	110.3
Provision for income taxes	10.6	34.1	46.5	52.1
Net income from continuing operations	91.2	48.9	227.5	58.2
Income from discontinued operations, net of tax	18.9	78.2	27.0	219.8
(Loss) gain from sale of discontinued operations, net of tax	0.0	1.7	0.0	(198.9)	$ 181.1
Net income	110.1	125.4	254.5	476.9
Comprehensive income, net of tax
Net income	110.1	125.4	254.5	476.9
Changes in cumulative translation adjustment (inclusive of divestiture of business reclassified to gain from sale of $0.0 and $374.2 for the three and nine months ended September 30, 2017, respectively)	(2.1)	34.5	23.1	502.8
Changes in market value of derivative financial instruments, net of tax	(1.0)	(3.0)	(0.7)	(2.3)
Comprehensive income	$ 107.0	$ 156.9	$ 276.9	$ 977.4
Earnings (loss) Per Share, Basic
Continuing operations (in dollars per share)	$ 0.52	$ 0.27	$ 1.29	$ 0.32
Discontinued operations (in dollars per share)	0.11	0.42	0.15	2.30
Basic earnings (loss) per ordinary share (in dollars per share)	0.63	0.69	1.44	2.62
Earnings (loss) Per Share, Diluted
Continuing operations (in dollars per share)	0.52	0.27	1.28	0.32
Discontinued operations (in dollars per share)	0.11	0.41	0.15	2.28
Diluted earnings (loss) per ordinary share (in dollars per share)	$ 0.63	$ 0.68	$ 1.43	$ 2.60
Weighted average ordinary shares outstanding
Basic (shares)	174.3	181.5	176.8	181.7
Diluted (shares)	175.7	183.5	178.5	183.7
Cash dividends paid per ordinary share	$ 0.175	$ 0.345	$ 0.875	$ 1.035