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Derivatives (Tables)
 6 Months Ended
Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivatives Not Designated as Hedging Instruments
The following table sets forth the Company's derivative assets and liabilities that were accounted for at fair value and not designated as cashflow hedges as of June 30, 2019 and December 31, 2018:
 
Asset Fair Value
 
June 30, 2019
 
December 31, 2018
Commodity contracts (1)
$
13.5

 
$
8.2

Foreign exchange contracts (2)
—

 
—

Total
$
13.5

 
$
8.2

 
 
 
 
 
Liability Fair Value
 
June 30, 2019
 
December 31, 2018
Commodity contracts (1)
$
6.6

 
$
2.2

Foreign exchange contracts (2)
0.5

 
0.3

Total
$
7.1

 
$
2.5

 
 
 
 

(1) Commodity contracts reflect our outstanding LME forward financial sales contracts, MWP forward financial sales contracts, Hawesville L4 power price swaps, fixed for floating swaps, and Nord Pool power price swaps.
(2) Foreign exchange contracts reflect our outstanding FX swaps.
Schedule of Derivative Instruments
The following table summarizes the net (loss) gain on forward and derivative contracts:
 
Three months ended June 30,
 
Six months ended June 30,
 
2019
 
2018
 
2019
 
2018
Commodity contracts(3)
$
6.1

 
$
1.2

 
$
0.6

 
$
1.9

Foreign exchange contracts
0.0

 
—

 
(0.2
)
 
—

   Total
$
6.1

 
$
1.2

 
$
0.4


$
1.9

(3) For the three months ended June 30, 2019 and 2018, $1.8 million and $(0.3) million of the net (loss) gain, respectively, was with Glencore. For the six months ended June 30, 2019 and 2018, $0.8 million and $0.1 million of the net (loss) gain, respectively, was with Glencore.