Consolidated Statements Of Operations And Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Income Statement [Abstract]
Net sales	[1]	$ 2,957.2		$ 2,965.1		$ 2,845.7
Cost of goods sold		1,905.7		1,917.4		1,858.2
Gross profit		1,051.5		1,047.7		987.5
Selling, general and administrative		540.1		534.3		536.0
Research and development		78.9		76.7		73.2
Operating income		432.5		436.7		378.3
Other (income) expense
(Gain) loss on sale of businesses		(2.2)		7.3		4.2
Loss on early extinguishment of debt		0.0		17.1		101.4
Net interest expense		30.1		32.6		87.3
Other (income) expense		(2.9)		(0.1)		12.6
Income from continuing operations before income taxes		407.5		379.8		172.8
Provision for income taxes		45.8		58.1		58.7
Net income from continuing operations		361.7		321.7		114.1
(Loss) income from discontinued operations, net of tax		(6.0)		25.7		371.3
Income (loss) from discontinued operations, net of tax		(6.0)		25.7		371.3
Gain from sale of discontinued operations, net of tax		0.0		0.0		181.1
Net income		355.7		347.4		666.5
Comprehensive income, net of tax
Net income		355.7		347.4		666.5
Changes in cumulative translation adjustment (inclusive of divestiture of business reclassified to gain from sale of $374.2 for the year ended December 31, 2017)		(15.3)		10.0		497.5
Changes in market value of derivative financial instruments, net of tax		17.4		4.8		(4.6)
Comprehensive income		$ 357.8		$ 362.2		$ 1,159.4
Earnings per ordinary share
Continuing operations (USD per share)		$ 2.14		$ 1.83		$ 0.63
Discontinued operations (USD per share)		(0.04)		0.15		3.04
Basic earnings per ordinary share (USD per share)		2.10	[2]	1.98	[3]	3.67
Continuing operations (USD per share)		2.12		1.81		0.62
Discontinued operations (USD per share)		(0.03)		0.15		3.01
Diluted earnings per ordinary share (USD per share)		$ 2.09	[2]	$ 1.96	[3]	$ 3.63
Weighted average ordinary shares outstanding
Basic (shares)		169.4		175.8		181.7
Diluted (shares)		170.4		177.3		183.7

[1] ⁽¹⁾  One customer in the Aquatic Systems segment, Pool Corporation, represented approximately 15% of our consolidated net sales in 2019, 2018 and 2017.

[2] ⁽¹⁾  Amounts may not total to annual earnings because each quarter and year are calculated separately based on basic and diluted weighted-average ordinary shares outstanding during that period.

[3] ⁽²⁾  Amounts may not total to annual earnings because each quarter and year are calculated separately based on basic and diluted weighted-average ordinary shares outstanding during that period.