Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 535.7	$ 529.0	$ 1,670.4	$ 1,688.5
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Interest expense, net	$ (56.8)	$ (67.5)	$ (174.5)	$ (220.8)
Other expense, net	(4.4)	(2.2)	(9.6)	(8.7)
Earnings before income taxes	184.6	153.6	616.6	594.8
Provision for income taxes	(247.4)	(8.5)	(193.5)	71.6
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	6.7	(7.4)	16.7	(32.1)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Earnings before income taxes	11.2	(5.0)	28.2	(26.9)
Provision for income taxes	1.5	(0.9)	4.1	(3.9)
Net of tax	9.7	(4.1)	24.1	(23.0)
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	$ 11.3	$ (4.9)	$ 25.8	$ (26.5)
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] | Interest Rate Swaps [Member]
Other Comprehensive Income Loss [Line Items]
Interest expense, net			$ 2.8
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)	(0.4)	$ (0.4)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Earnings before income taxes	(3.7)	(4.3)	(10.8)	(12.1)
Provision for income taxes	(0.7)	(1.0)	(3.4)	(3.0)
Net of tax	(3.0)	(3.3)	(7.4)	(9.1)
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	2.4	5.5	7.4
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	$ (5.5)	$ (6.7)	$ (16.3)	$ (19.5)