Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income Loss [Line Items]
Interest income	$ 2.3			$ 3.0		$ 7.4	$ 8.4
Provision for income taxes	9.6	$ (64.8)	$ 55.7	56.9	$ (9.1)	0.5	181.4
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	21.9			2.9		63.2	6.3
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Other Comprehensive Income Loss [Line Items]
Total before tax	30.1			8.6		90.8	20.1
Provision for income taxes	7.1			3.6		21.1	10.4
Net of tax	23.0			5.0		69.7	9.7
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	30.5			8.7		91.7	20.4
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Foreign Exchange Options [Member]
Other Comprehensive Income Loss [Line Items]
Cost of products sold				(0.1)			(0.3)
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)					(0.9)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Prior service cost	1.1			1.0		3.4	2.9
Unrecognized actuarial (loss)	(5.0)			(2.9)		(13.5)	(8.6)
Total before tax	(3.9)			(1.9)		(10.1)	(5.7)
Provision for income taxes	(2.8)			0.2		(3.6)	(1.9)
Net of tax	$ (1.1)			$ (2.1)		$ (6.5)	(3.8)
Investments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Interest income							0.4
Net of tax							$ 0.4