Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 581.3	$ 583.7	$ 1,134.7	$ 1,159.5
Type of Cost, Good or Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Interest expense, net	$ (59.7)	$ (75.3)	$ (117.7)	$ (153.3)
Other expense, net	(4.7)	(2.9)	(5.2)	(6.5)
Earnings before income taxes	140.3	217.8	432.0	441.2
Provision for income taxes	8.4	32.9	53.9	80.1
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	3.8	(12.2)	10.0	(24.7)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Earnings before income taxes	7.2	(10.7)	17.0	(21.9)
Provision for income taxes	1.0	(1.5)	2.6	(3.0)
Net of tax	6.2	(9.2)	14.4	(18.9)
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	$ 7.4	$ (10.5)	$ 14.5	$ (21.6)
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	$ (0.2)	$ (0.2)	(0.3)	$ (0.3)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Earnings before income taxes	(3.6)	(4.2)	(7.1)	(7.8)
Provision for income taxes	(1.2)	(1.2)	(2.7)	(2.0)
Net of tax	(2.4)	(3.0)	(4.4)	(5.8)
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	1.9	2.5	3.7	5.0
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)	$ (10.8)	$ (12.8)