Accumulated Other Comprehensive Income - Reclassification Adjustments from Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income Loss [Line Items]
Cost of product sold	$ 333.2	$ 323.6	$ 638.6	$ 616.5
Interest income	2.9	3.9	5.4	7.6
Provision for income taxes	60.3	44.3	125.1	110.0
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Net of tax	(0.9)	0.1	3.4	(8.0)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash flow hedges [Member]
Other Comprehensive Income Loss [Line Items]
Total before tax	6.6	3.6	11.5	(1.9)
Provision for income taxes	3.9	1.2	6.8	(0.4)
Net of tax	2.7	2.4	4.7	(1.5)
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 product sold	6.7	3.7	11.7	(1.7)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cash flow hedges [Member] | Foreign exchange options [Member]
Other Comprehensive Income Loss [Line Items]
Cost of product sold	(0.1)	(0.1)	(0.2)	(0.2)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items [Member]
Other Comprehensive Income Loss [Line Items]
Prior service cost	0.9	0.9	1.9	1.9
Unrecognized actuarial (loss)	(2.8)	(4.6)	(5.7)	(9.3)
Total before tax	(1.9)	(3.7)	(3.8)	(7.4)
Provision for income taxes	1.7	(1.4)	(2.1)	(0.9)
Net of tax	(3.6)	(2.3)	(1.7)	(6.5)
Investments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Other Comprehensive Income Loss [Line Items]
Interest income			0.4
Provision for income taxes	0		0
Net of tax			$ 0.4