Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 581.6	$ 424.5	$ 1,098.0	$ 911.6
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Interest expense, net	$ (54.7)	$ (54.0)	$ (107.0)	$ (104.9)
Other income, net	8.1	3.8	15.4	6.8
Earnings (loss) before income taxes	173.9	(221.9)	394.5	(725.8)
Provision (benefit) for income taxes	31.4	(13.7)	54.3	(8.5)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	(1.1)	11.0	(1.4)	24.8
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Earnings (loss) before income taxes	(2.8)	15.0	(1.8)	30.4
Provision (benefit) for income taxes	(0.5)	1.9		3.8
Net of tax	(2.3)	13.1	(1.8)	26.6
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	$ (2.6)	$ 15.1	$ (1.5)	$ 30.7
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	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	$ (0.2)	$ (0.1)	$ (0.3)	$ (0.3)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Provision (benefit) for income taxes	0.6	0.4	(0.1)	(1.6)
Net of tax	1.2	(2.1)	0.4	(1.8)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member] | Prior Service Cost and Unrecognized Actuarial Gain Loss [Member]
Other Comprehensive Income Loss [Line Items]
Other income, net	$ 1.8	$ (1.7)	$ 0.3	$ (3.4)