Derivative Instruments And Hedging Activities (Schedule Of Derivative Gains (Losses) Recognized In Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	$ 3.7	$ 1.9
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)	3.6	0.4
Australian Dollar Foreign Exchange Contract (Hedge Designation) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	3.0	1.9
Australian Dollar Foreign Exchange Contract (Hedge Designation) [Member] | Product Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)	3.1	0.2
Canadian Dollar Foreign Exchange Contracts Hedge Designation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivative (Effective Portion)	0.7
Canadian Dollar Foreign Exchange Contracts Hedge Designation [Member] | Cost Of Goods Sold And Operating Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)	0.5
Australian Dollar Foreign Exchange Contract (Prior to De-Designation) [Member] | Product Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from Accumulated OCI into Income (Effective Portion)		$ 0.2