Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
DERIVATIVE INSTRUMENTS (Schedule Of Derivatives Not Designated As Hedging Instruments) (Details)
€ in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2020
EUR (€)
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (32.8)    
Revenues [1] 359.1 $ 157.0  
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 (0.1) 0.0  
Customer Supply Agreement [Member] | Revenue from Contract with Customer Benchmark [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (25.6) 17.1  
Provisional Pricing Arrangements [Member] | Revenue from Contract with Customer Benchmark [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (1.2) (11.6)  
Commodity Contract [Member] | Cost of Sales [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (5.9) $ 0.0  
Euro Member Countries, Euro | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Notional Amount | €     € 2
[1]
1 Includes Realization of deferred revenue of $34.6 million for the three months ended March 31, 2020.