v3.4.0.3
Derivative Instruments (Tables)
 3 Months Ended
Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative assets and derivative liabilities
The following table shows our derivative assets and derivative liabilities:
 
 
March 31, 2016
 
December 31, 2015
(in millions)
 
Derivative Assets
 
Derivative Liabilities
 
Derivative Assets
 
Derivative Liabilities
Other current
 
 
 
 
 
 
 
 
   Natural gas contracts
 
$
1.7

 
$
28.7

 
$
2.6

 
$
38.5

   Petroleum products contracts
 
0.9

 
3.3

 
0.9

 
3.8

   FTRs
 
1.1

 
—

 
3.6

 
—

   Coal contracts
 
1.6

 
10.3

 
1.7

 
6.7

   Total other current *
 
$
5.3

 
$
42.3


$
8.8


$
49.0

 
 
 
 
 
 
 
 
 
Other long-term
 
 
 
 
 
 
 
 
   Natural gas contracts
 
$
0.6

 
$
1.8

 
$
0.5

 
$
3.3

   Petroleum products contracts
 
0.2

 
0.5

 
0.3

 
1.1

   Coal contracts
 
—

 
4.4

 
0.3

 
5.6

   Total other long-term *
 
$
0.8

 
$
6.7


$
1.1


$
10.0

Total
 
$
6.1

 
$
49.0

 
$
9.9

 
$
59.0



*
On our balance sheets, we classify derivative assets and liabilities as current or long-term based on the maturities of the underlying contracts.
Estimated notional volumes and gain (losses)
Our estimated notional sales volumes and gains (losses) were as follows:
 
 
Three Months Ended March 31, 2016
 
Three Months Ended March 31, 2015
(in millions)
 
Volume
 
Gains (Losses)
 
Volume
 
Gains (Losses)
Natural gas contracts
 
50.1 Dth
 
$
(33.5
)
 
13.3 Dth
 
$
(7.1
)
Petroleum products contracts
 
3.0 gallons
 
(1.1
)
 
0.9 gallons
 
(0.1
)
FTRs
 
7.6 MWh
 
3.0

 
6.2 MWh
 
2.1

Total
 
 
 
$
(31.6
)
 
 
 
$
(5.1
)
Offsetting assets and liabilities
The following table shows derivative assets and derivative liabilities if derivative instruments by counterparty were presented net on the balance sheet:
 
 
March 31, 2016
 
December 31, 2015
(in millions)
 
Derivative Assets
 
Derivative Liabilities
 
Derivative Assets
 
Derivative Liabilities
Gross amount recognized on the balance sheet
 
$
6.1

 
$
49.0

 
$
9.9

 
$
59.0

Gross amount not offset on balance sheet *
 
(1.6
)
 
(13.6
)
 
(3.0
)
 
(22.5
)
Net amount
 
$
4.5

 
$
35.4

 
$
6.9

 
$
36.5


*
Includes cash collateral posted of $12.0 million and $19.5 million as of March 31, 2016, and December 31, 2015, respectively.