Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 553.4	$ 575.8
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Interest expense, net	$ (58.0)	$ (78.0)
Other expense, net	(0.5)	(3.6)
Earnings before income taxes	291.7	223.4
Provision for income taxes	45.5	47.2
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	6.2	(12.5)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Earnings before income taxes	9.9	(11.2)
Provision for income taxes	1.7	(1.5)
Net of tax	8.2	(9.7)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Foreign Exchange Forward Contracts [Member]
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 7.2	$ (11.1)
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Forward Starting Interest Rate Swaps [Member]
Other Comprehensive Income Loss [Line Items]
Interest expense, net	$ (0.1)	$ (0.1)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Interest Rate Swaps [Member]
Other Comprehensive Income Loss [Line Items]
Interest expense, net	2.8
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Earnings before income taxes	(3.5)	(3.6)
Provision for income taxes	(1.5)	(0.8)
Net of tax	(2.0)	(2.8)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member] | Prior Service Cost [Member]
Other Comprehensive Income Loss [Line Items]
Other expense, net	1.8	2.5
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member] | Unrecognized Actuarial (Loss) [Member]
Other Comprehensive Income Loss [Line Items]
Other expense, net	$ (5.3)	$ (6.1)