Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 516.4	$ 487.1
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Interest expense, net	$ (52.3)	$ (50.9)
Other income, net	7.3	3.0
Earnings (loss) before income taxes	220.6	(503.9)
Provision for income taxes	22.9	5.2
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	(0.3)	13.8
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Earnings (loss) before income taxes	0.9	15.4
Provision for income taxes	0.4	1.9
Net of tax	0.5	13.5
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	$ 1.1	$ 15.6
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	$ (0.2)	$ (0.2)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Provision for income taxes	(0.7)	(2.0)
Net of tax	(0.8)	0.3
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member] | Prior Service Cost and Unrecognized Actuarial Loss {Member]
Other Comprehensive Income Loss [Line Items]
Other income, net	$ (1.5)	$ (1.7)