Supplemental Guarantor Information - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 688.9	$ 732.6
Cost of goods sold	453.3	479.3
Gross profit	235.6	253.3
Selling, general and administrative	147.3	141.8
Research and development	20.7	18.8
Operating income	67.6	92.7
Loss (earnings) from continuing operations of investment in subsidiaries	0.0	0.0
Other (income) expense:
Loss on sale of business	(3.5)	5.3
Net interest (income) expense	7.3	13.5
Other Income	0.6
Other expense		0.4
Income from continuing operations before income taxes	63.2	73.5
Provision for income taxes	10.8	15.1
Net income from continuing operations	52.4	58.4
(Loss) income from discontinued operations, net of tax	(1.1)	44.5
(Loss) earnings from discontinued operations of investment in subsidiaries	0.0	0.0
Comprehensive income, net of tax
Net income	51.3	102.9
Changes in cumulative translation adjustment	(1.6)	2.4
Changes in market value of derivative financial instruments, net of tax	4.3	(3.8)
Comprehensive income	54.0	101.5
Parent Company Guarantor
Condensed Financial Statements, Captions [Line Items]
Net sales	0.0	0.0
Cost of goods sold	0.0	0.0
Gross profit	0.0	0.0
Selling, general and administrative	3.0	7.1
Research and development	0.0	0.0
Operating income	(3.0)	(7.1)
Loss (earnings) from continuing operations of investment in subsidiaries	(55.4)	(65.5)
Other (income) expense:
Loss on sale of business	0.0	0.0
Net interest (income) expense	0.0	0.0
Other Income	0.0
Other expense		0.0
Income from continuing operations before income taxes	52.4	58.4
Provision for income taxes	0.0	0.0
Net income from continuing operations	52.4	58.4
(Loss) income from discontinued operations, net of tax	0.0	0.0
(Loss) earnings from discontinued operations of investment in subsidiaries	(1.1)	44.5
Comprehensive income, net of tax
Net income	51.3	102.9
Changes in cumulative translation adjustment	(1.6)	2.4
Changes in market value of derivative financial instruments, net of tax	4.3	(3.8)
Comprehensive income	54.0	101.5
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales	0.0	0.0
Cost of goods sold	0.0	0.0
Gross profit	0.0	0.0
Selling, general and administrative	0.1	0.0
Research and development	0.0	0.0
Operating income	(0.1)	0.0
Loss (earnings) from continuing operations of investment in subsidiaries	(56.9)	(65.2)
Other (income) expense:
Loss on sale of business	0.0	0.0
Net interest (income) expense	1.4	(0.3)
Other Income	0.0
Other expense		0.0
Income from continuing operations before income taxes	55.4	65.5
Provision for income taxes	0.0	0.0
Net income from continuing operations	55.4	65.5
(Loss) income from discontinued operations, net of tax	0.0	0.0
(Loss) earnings from discontinued operations of investment in subsidiaries	(1.1)	44.5
Comprehensive income, net of tax
Net income	54.3	110.0
Changes in cumulative translation adjustment	(1.6)	2.4
Changes in market value of derivative financial instruments, net of tax	4.3	(3.8)
Comprehensive income	57.0	108.6
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Net sales	0.0	0.0
Cost of goods sold	0.0	0.0
Gross profit	0.0	0.0
Selling, general and administrative	0.3	0.1
Research and development	0.0	0.0
Operating income	(0.3)	(0.1)
Loss (earnings) from continuing operations of investment in subsidiaries	(57.7)	(77.9)
Other (income) expense:
Loss on sale of business	0.0	0.0
Net interest (income) expense	0.5	12.6
Other Income	0.0
Other expense		0.0
Income from continuing operations before income taxes	56.9	65.2
Provision for income taxes	0.0	0.0
Net income from continuing operations	56.9	65.2
(Loss) income from discontinued operations, net of tax	0.0	0.0
(Loss) earnings from discontinued operations of investment in subsidiaries	(1.1)	44.5
Comprehensive income, net of tax
Net income	55.8	109.7
Changes in cumulative translation adjustment	(1.6)	2.4
Changes in market value of derivative financial instruments, net of tax	4.3	(3.8)
Comprehensive income	58.5	108.3
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales	688.9	732.6
Cost of goods sold	453.3	479.3
Gross profit	235.6	253.3
Selling, general and administrative	143.9	134.6
Research and development	20.7	18.8
Operating income	71.0	99.9
Loss (earnings) from continuing operations of investment in subsidiaries	0.0	0.0
Other (income) expense:
Loss on sale of business	(3.5)	5.3
Net interest (income) expense	5.4	1.2
Other Income	0.6
Other expense		0.4
Income from continuing operations before income taxes	68.5	93.0
Provision for income taxes	10.8	15.1
Net income from continuing operations	57.7	77.9
(Loss) income from discontinued operations, net of tax	(1.1)	44.5
(Loss) earnings from discontinued operations of investment in subsidiaries	0.0	0.0
Comprehensive income, net of tax
Net income	56.6	122.4
Changes in cumulative translation adjustment	(1.6)	2.4
Changes in market value of derivative financial instruments, net of tax	4.3	(3.8)
Comprehensive income	59.3	121.0
Consolidation, Eliminations
Condensed Financial Statements, Captions [Line Items]
Net sales	0.0	0.0
Cost of goods sold	0.0	0.0
Gross profit	0.0	0.0
Selling, general and administrative	0.0	0.0
Research and development	0.0	0.0
Operating income	0.0	0.0
Loss (earnings) from continuing operations of investment in subsidiaries	170.0	208.6
Other (income) expense:
Loss on sale of business	0.0	0.0
Net interest (income) expense	0.0	0.0
Other Income	0.0
Other expense		0.0
Income from continuing operations before income taxes	(170.0)	(208.6)
Provision for income taxes	0.0	0.0
Net income from continuing operations	(170.0)	(208.6)
(Loss) income from discontinued operations, net of tax	0.0	0.0
(Loss) earnings from discontinued operations of investment in subsidiaries	3.3	(133.5)
Comprehensive income, net of tax
Net income	(166.7)	(342.1)
Changes in cumulative translation adjustment	4.8	(7.2)
Changes in market value of derivative financial instruments, net of tax	(12.9)	11.4
Comprehensive income	$ (174.8)	$ (337.9)