Derivative Instruments And Hedging Activities (Statements Of Financial Performance Location Table) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	$ 12.7	$ (15.2)	$ 13.7	$ (10.3)
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)	6.4	1.5	9.4	3.2
Australian Dollar Foreign Exchange Contract Hedge Designation [Member] | Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	1.4	(15.2)	7.5	(10.3)
Australian Dollar Foreign Exchange Contract Hedge Designation [Member] | Product Revenue [Member]
Derivative [Line Items]
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)	5.1	1.5	7.8	2.5
Canadian Dollar Foreign Exchange Contracts Hedge Designation [Member] | Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	11.3		6.2
Canadian Dollar Foreign Exchange Contracts Hedge Designation [Member] | Cost Of Goods Sold And Operating Expenses [Member]
Derivative [Line Items]
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)	1.3		1.6
Australian Dollar Foreign Exchange Contract Prior To De Designation [Member] | Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)
Australian Dollar Foreign Exchange Contract Prior To De Designation [Member] | Product Revenue [Member]
Derivative [Line Items]
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)				$ 0.7