Financial Statements of Parent Company Guarantor - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 1,269.7	$ 1,183.5
Cost of goods sold	807.7	761.2
Gross profit	462.0	422.3
Selling, general and administrative	279.6	251.7
Research and development	30.1	30.0
Operating income	152.3	140.6
Loss (earnings) from continuing operations of investment in subsidiaries	0.0	0.0
Other (income) expense:
Loss on sale of business	5.3	0.0
Net interest expense	13.8	35.0
Other expense	1.4	2.0
Income from continuing operations before income taxes	131.8	103.6
Provision for income taxes	27.6	22.9
Net income from continuing operations	104.2	80.7
(Loss) income from discontinued operations, net of tax	(1.3)	7.1
Earnings (loss) from discontinued operations of investment in subsidiaries	0.0	0.0
Comprehensive income, net of tax
Net income	102.9	87.8
Changes in cumulative translation adjustment	(2.4)	(75.7)
Changes in market value of derivative financial instruments, net of tax	(3.8)	1.6
Comprehensive income	101.5	165.1
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	7.1	(11.0)
Research and development	0.0	0.0
Operating income	(7.1)	11.0
Loss (earnings) from continuing operations of investment in subsidiaries	(111.3)	(69.7)
Other (income) expense:
Loss on sale of business	0.0
Net interest expense	0.0	0.0
Other expense	0.0	0.0
Income from continuing operations before income taxes	104.2	80.7
Provision for income taxes	0.0	0.0
Net income from continuing operations	104.2	80.7
(Loss) income from discontinued operations, net of tax	0.0	0.0
Earnings (loss) from discontinued operations of investment in subsidiaries	(1.3)	7.1
Comprehensive income, net of tax
Net income	102.9	87.8
Changes in cumulative translation adjustment	(2.4)	(75.7)
Changes in market value of derivative financial instruments, net of tax	(3.8)	1.6
Comprehensive income	101.5	165.1
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	0.0	0.1
Research and development	0.0	0.0
Operating income	0.0	(0.1)
Loss (earnings) from continuing operations of investment in subsidiaries	(110.7)	(69.7)
Other (income) expense:
Loss on sale of business	0.0
Net interest expense	(0.3)	(0.1)
Other expense	0.0	0.0
Income from continuing operations before income taxes	111.0	69.7
Provision for income taxes	0.0	0.0
Net income from continuing operations	111.0	69.7
(Loss) income from discontinued operations, net of tax	0.0	0.0
Earnings (loss) from discontinued operations of investment in subsidiaries	(1.3)	7.1
Comprehensive income, net of tax
Net income	109.7	76.8
Changes in cumulative translation adjustment	(2.4)	(75.7)
Changes in market value of derivative financial instruments, net of tax	(3.8)	1.6
Comprehensive income	108.3	154.1
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	0.1	0.4
Research and development	0.0	0.0
Operating income	(0.1)	(0.4)
Loss (earnings) from continuing operations of investment in subsidiaries	(123.7)	(98.5)
Other (income) expense:
Loss on sale of business	0.0
Net interest expense	12.6	28.4
Other expense	0.0	0.0
Income from continuing operations before income taxes	111.0	69.7
Provision for income taxes	0.0	0.0
Net income from continuing operations	111.0	69.7
(Loss) income from discontinued operations, net of tax	0.0	0.0
Earnings (loss) from discontinued operations of investment in subsidiaries	(1.3)	7.1
Comprehensive income, net of tax
Net income	109.7	76.8
Changes in cumulative translation adjustment	(2.4)	(75.7)
Changes in market value of derivative financial instruments, net of tax	(3.8)	1.6
Comprehensive income	108.3	154.1
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net sales	1,269.7	1,183.5
Cost of goods sold	807.7	761.2
Gross profit	462.0	422.3
Selling, general and administrative	272.4	262.2
Research and development	30.1	30.0
Operating income	159.5	130.1
Loss (earnings) from continuing operations of investment in subsidiaries	0.0	0.0
Other (income) expense:
Loss on sale of business	5.3
Net interest expense	1.5	6.7
Other expense	1.4	2.0
Income from continuing operations before income taxes	151.3	121.4
Provision for income taxes	27.6	22.9
Net income from continuing operations	123.7	98.5
(Loss) income from discontinued operations, net of tax	(1.3)	7.1
Earnings (loss) from discontinued operations of investment in subsidiaries	0.0	0.0
Comprehensive income, net of tax
Net income	122.4	105.6
Changes in cumulative translation adjustment	(2.4)	(75.7)
Changes in market value of derivative financial instruments, net of tax	(3.8)	1.6
Comprehensive income	121.0	182.9
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	345.7	237.9
Other (income) expense:
Loss on sale of business	0.0
Net interest expense	0.0	0.0
Other expense	0.0
Income from continuing operations before income taxes	(345.7)	(237.9)
Provision for income taxes	0.0	0.0
Net income from continuing operations	(345.7)	(237.9)
(Loss) income from discontinued operations, net of tax	0.0	0.0
Earnings (loss) from discontinued operations of investment in subsidiaries	3.9	(21.3)
Comprehensive income, net of tax
Net income	(341.8)	(259.2)
Changes in cumulative translation adjustment	7.2	227.1
Changes in market value of derivative financial instruments, net of tax	11.4	(4.8)
Comprehensive income	$ (337.6)	$ (491.1)