Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule Of Derivatives Not Designated As Hedging Instruments) (Details)

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 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 92.6 $ 5.5 $ 178.3
Foreign Exchange Contract [Member] | Product Revenues [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 0.0 (12.6) 0.0
Foreign Exchange Contract [Member] | Other Nonoperating Income (Expense) [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 0.0 (3.6)  
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments     0.0
Commodity Contract [Member] | Other Nonoperating Income (Expense) [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 1.9 (4.0) 0.0
Customer Supply Agreements [Member] | Product Revenues [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 41.7 27.1 187.8
Provisional Pricing Arrangements [Member] | Product Revenues [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 49.0 $ (1.4) $ (9.5)