Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income Loss [Line Items]
Cost of products sold	$ 479.3	$ 552.1	$ 1,760.0	$ 1,131.3
Earnings before income taxes	103.5	31.8	368.8	20.0
Provision (benefit) for income taxes	(54.4)	9.6	133.9	0.5
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	11.7	21.9	52.0	63.2
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Earnings before income taxes	17.7	30.1	75.2	90.8
Provision (benefit) for income taxes	3.8	7.1	17.2	21.1
Net of tax	13.9	23.0	58.0	69.7
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	18.1	30.5	76.5	91.7
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 expenses	(0.4)	(0.4)	(1.3)	(0.9)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Prior service cost	1.9	1.1	5.8	3.4
Unrecognized actuarial (loss)	(5.1)	(5.0)	(15.1)	(13.5)
Earnings before income taxes	(3.2)	(3.9)	(9.3)	(10.1)
Provision (benefit) for income taxes	(1.0)	(2.8)	(3.3)	(3.6)
Net of tax	$ (2.2)	$ (1.1)	$ (6.0)	$ (6.5)