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RISK MANAGEMENT ACTIVITIES (Tables)
 3 Months Ended
Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Assets and liabilities from risk management activities
The following tables show our assets and liabilities from risk management activities at the utilities and IBS:
 
 
 
 
March 31, 2015
(Millions)
 
Balance Sheet Presentation *
 
Assets from
Risk Management Activities
 
Liabilities from
Risk Management Activities
Natural gas contracts
 
Other current
 
$
0.5

 
$
28.0

Natural gas contracts
 
Other long-term
 
0.6

 
5.7

FTRs
 
Other current
 
0.7

 
0.1

Petroleum product contracts
 
Other current
 
—

 
2.1

Coal contracts
 
Other current
 
—

 
4.3

Coal contracts
 
Other long-term
 
—

 
3.1

 
 
Other current
 
1.2

 
34.5

 
 
Other long-term
 
0.6

 
8.8

Total
 
 
 
$
1.8

 
$
43.3


*
We classify assets and liabilities from risk management activities as current or long-term based on the maturities of the underlying contracts.
 
 
 
 
December 31, 2014
(Millions)
 
Balance Sheet Presentation *
 
Assets from
Risk Management Activities
 
Liabilities from
Risk Management Activities
Natural gas contracts
 
Other current
 
$
1.8

 
$
37.3

Natural gas contracts
 
Other long-term
 
0.5

 
5.3

FTRs
 
Other current
 
2.2

 
0.3

Petroleum product contracts
 
Other current
 
—

 
2.7

Petroleum product contracts
 
Other long-term
 
—

 
0.1

Coal contracts
 
Other current
 
—

 
2.4

Coal contracts
 
Other long-term
 
—

 
1.0

 
 
Other current
 
4.0

 
42.7

 
 
Other long-term
 
0.5

 
6.4

Total
 
 
 
$
4.5

 
$
49.1


*
We classify assets and liabilities from risk management activities as current or long-term based on the maturities of the underlying contracts.
Potential effect of netting arrangements for recognized derivative assets and liabilities
The following tables show the potential effect on our financial position of netting arrangements for recognized derivative assets and liabilities:
 
 
March 31, 2015
(Millions)
 
Gross Amount
 
Potential Effects of Netting, Including Cash Collateral
 
Net Amount
Derivative assets subject to master netting or similar arrangements
 
$
1.8

 
$
1.2

 
$
0.6

Derivative assets not subject to master netting or similar arrangements
 
—

 


 
—

Total risk management assets
 
$
1.8

 


 
$
0.6

 
 
 
 
 
 
 
Derivative liabilities subject to master netting or similar arrangements
 
$
35.9

 
$
5.5

 
$
30.4

Derivative liabilities not subject to master netting or similar arrangements
 
7.4

 


 
7.4

Total risk management liabilities
 
$
43.3

 
 
 
$
37.8


 
 
December 31, 2014
(Millions)
 
Gross Amount
 
Potential Effects of Netting, Including Cash Collateral
 
Net Amount
Derivative assets subject to master netting or similar arrangements
 
$
3.2

 
$
1.3

 
$
1.9

Derivative assets not subject to master netting or similar arrangements
 
1.3

 


 
1.3

Total risk management assets
 
$
4.5

 


 
$
3.2

 
 

 

 

Derivative liabilities subject to master netting or similar arrangements
 
$
45.7

 
$
8.8

 
$
36.9

Derivative liabilities not subject to master netting or similar arrangements
 
3.4

 


 
3.4

Total risk management liabilities
 
$
49.1

 
 
 
$
40.3
Cash collateral positions
The following table shows our cash collateral positions:
(Millions)
 
March 31, 2015
 
December 31, 2014
Cash collateral provided to others: *
 
 
 
 
Related to contracts under master netting or similar arrangements
 
$
8.9

 
$
11.6

Other
 
1.1

 
1.1


*
Cash collateral provided to others is reflected in other current assets.
Notional volumes of outstanding derivative contracts
The notional volumes of outstanding derivative contracts at the utilities and IBS were as follows:
 
 
March 31, 2015
 
December 31, 2014
(Millions)
 
Purchases
 
Other Transactions
 
Purchases
 
Other Transactions
Natural gas (therms)
 
669.0

 
N/A

 
1,860.0

 
N/A

FTRs (kilowatt-hours)
 
N/A

 
2,111.1

 
N/A

 
4,287.7

Petroleum products (barrels)
 
0.1

 
N/A

 
0.1

 
N/A

Coal (tons)
 
2.6

 
N/A

 
3.0

 
N/A
Unrealized gains (losses) related to derivatives
The table below shows the unrealized gains (losses) recorded related to derivative contracts at the utilities and IBS:
 
 
 
 
Three Months Ended March 31
(Millions)
 
Financial Statement Presentation
 
2015
 
2014
Natural gas
 
Balance Sheet — Regulatory assets (current)
 
$
10.9

 
$
0.9

Natural gas
 
Balance Sheet — Regulatory assets (long-term)
 
(0.6
)
 
(0.2
)
Natural gas
 
Balance Sheet — Regulatory liabilities (current)
 
(1.5
)
 
3.4

Natural gas
 
Balance Sheet — Regulatory liabilities (long-term)
 
0.1

 
(0.4
)
Natural gas
 
Income Statement — Operating and maintenance expense
 
(0.1
)
 
0.2

FTRs
 
Balance Sheet — Regulatory assets (current)
 
0.2

 
0.1

FTRs
 
Balance Sheet — Regulatory liabilities (current)
 
(0.4
)
 
(0.1
)
Petroleum
 
Balance Sheet — Regulatory assets (current)
 
0.4

 
—

Petroleum
 
Income Statement — Operating and maintenance expense
 
0.4

 
—

Coal
 
Balance Sheet — Regulatory assets (current)
 
(2.6
)
 
0.2

Coal
 
Balance Sheet — Regulatory assets (long-term)
 
(2.0
)
 
0.4

Coal
 
Balance Sheet — Regulatory liabilities (long-term)
 
—

 
1.6