Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 2,252.6	$ 2,271.9	$ 2,132.9
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Interest expense, net	$ (226.9)	$ (289.3)	$ (325.3)
Earnings (loss) before income taxes	905.8	(271.1)	464.6
Provision (benefit) for income taxes	(225.7)	108.2	(1,348.8)
Other expense, net	(4.8)	(15.6)	(9.4)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	30.1	(35.6)	(3.5)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Earnings (loss) before income taxes	40.6	(26.8)	4.6
Provision (benefit) for income taxes	5.5	(3.2)	0.8
Net of tax	35.1	(23.6)	3.8
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	$ 38.4	$ (26.2)	$ 5.1
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	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	$ (0.6)	$ (0.6)	$ (0.5)
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 (loss) before income taxes	(7.3)	(16.3)	(11.8)
Provision (benefit) for income taxes	(2.3)	(4.3)	(4.5)
Net of tax	(5.0)	(12.0)	(7.3)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member] | Curtailment Gain [Member]
Other Comprehensive Income Loss [Line Items]
Other expense, net	7.2
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	7.3	9.9	10.3
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	$ (21.8)	$ (26.2)	$ (22.1)