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ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)
 12 Months Ended
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of changes, net of tax, in accumulated other comprehensive loss
The following table shows the changes, net of tax, to our accumulated other comprehensive loss:
 
 
 
 
 
 
Accumulated Other Comprehensive Loss
(Millions)
 
Cash Flow Hedges
 
Defined Benefit Plans
 
Balance at December 31, 2012
 
$
(5.2
)
 
$
(35.7
)
 
$
(40.9
)
Other comprehensive income before reclassifications
 
0.7

 
13.2

 
13.9

Amounts reclassified out of accumulated other comprehensive loss
 
1.4

 
2.4

 
3.8

Net 2013 other comprehensive income
 
2.1

 
15.6

 
17.7

Balance at December 31, 2013
 
(3.1
)
 
(20.1
)
 
(23.2
)
Other comprehensive loss before reclassifications
 
—

 
(6.0
)
 
(6.0
)
Amounts reclassified out of accumulated other comprehensive loss
 
(0.1
)
 
1.7

 
1.6

Net 2014 other comprehensive loss
 
(0.1
)
 
(4.3
)
 
(4.4
)
Balance at December 31, 2014
 
$
(3.2
)
 
$
(24.4
)
 
$
(27.6
)
Schedule of reclassifications out of accumulated other comprehensive loss
The following table shows the reclassifications out of accumulated other comprehensive loss during the years ended December 31:
 
 
Amount Reclassified
 
 
 (Millions)
 
2014
 
2013
 
Affected Line Item in the Statements of Income
Losses (gains) on cash flow hedges
 
 
 
 
 
 
    Utility commodity derivative contracts
 
$
—

 
$
0.2

 
Operating and maintenance expense (1) (2)
    Nonregulated commodity derivative contracts
 
—

 
3.7

 
Discontinued operations (2)
    Interest rate hedges
 
1.1

 
1.1

 
Interest expense
 
 
1.1

 
5.0

 
Total before tax
 
 
1.2

 
3.6

 
Tax expense
 
 
(0.1
)
 
1.4

 
Net of tax
 
 
 
 
 
 
 
Defined benefit plans
 
 
 
 
 
 
    Amortization of prior service costs (credits)
 
(0.2
)
 
4.3

 
(3) 
    Amortization of net actuarial losses (gains)
 
2.7

 
(0.2
)
 
(3) 
 
 
2.5

 
4.1

 
Total before tax
 
 
0.8

 
1.7

 
Tax expense
 
 
1.7

 
2.4

 
Net of tax
Total reclassifications
 
$
1.6

 
$
3.8

 
 


(1) 
This item relates to changes in the price of natural gas used to support utility operations.

(2) 
We no longer designate commodity contracts as cash flow hedges.

(3) 
These items are included in the computation of net periodic benefit cost. See Note 18, Employee Benefit Plans, for more information.