Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments And Hedging Activities (Schedule Of Derivative Gains (Losses) Recognized In Accumulated Other Comprehensive Income) (Detail)

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Derivative Instruments And Hedging Activities (Schedule Of Derivative Gains (Losses) Recognized In Accumulated Other Comprehensive Income) (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain Reclassified From Accumulated OCI into Income (Effective Portion) $ (0.6) $ 1.3 $ 3.0 $ 1.7
Amount of Gain Recognized in OCI on Derivative (Effective Portion) (3.8) 3.0 (0.1) 4.9
Product Revenue [Member] | Australian Dollar Foreign Exchange Contracts (Hedge Designation) [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain Reclassified From Accumulated OCI into Income (Effective Portion) (0.4) 0.8 2.7 1.0
Amount of Gain Recognized in OCI on Derivative (Effective Portion) 2.1 3.0 5.1 4.9
Product Revenue [Member] | Australian Dollar Foreign Exchange Contracts (Prior to De-Designation) [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain Reclassified From Accumulated OCI into Income (Effective Portion)   0.5   0.7
Cost Of Goods Sold And Operating Expenses [Member] | Canadian Dollar Foreign Exchange Contracts (Hedge Designation) [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain Reclassified From Accumulated OCI into Income (Effective Portion) (0.2)   0.3  
Amount of Gain Recognized in OCI on Derivative (Effective Portion) $ (5.9)   $ (5.2)