Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 2,128.3	$ 2,252.6	$ 2,271.9
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Interest expense, net	$ (212.0)	$ (226.9)	$ (289.3)
(Loss) Earnings before income taxes	(274.4)	905.8	(271.1)
Provision (benefit) for income taxes	(137.0)	(225.7)	108.2
Other income (expense), net	25.4	(4.8)	(15.6)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	35.6	30.1	(35.6)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
(Loss) Earnings before income taxes	44.8	40.6	(26.8)
Provision (benefit) for income taxes	6.3	5.5	(3.2)
Net of tax	38.5	35.1	(23.6)
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	$ 45.4	$ 38.4	$ (26.2)
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)	$ (0.6)
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]
(Loss) Earnings before income taxes	(4.6)	(7.3)	(16.3)
Provision (benefit) for income taxes	(1.7)	(2.3)	(4.3)
Net of tax	(2.9)	(5.0)	(12.0)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member] | Curtailment Gain [Member]
Other Comprehensive Income Loss [Line Items]
Other income (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 income (expense), net	3.9	7.3	9.9
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member] | Unrecognized Actuarial (Loss) [Member]
Other Comprehensive Income Loss [Line Items]
Other income (expense), net	$ (8.5)	$ (21.8)	$ (26.2)