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Business Segments (Tables)
 6 Months Ended
Jun. 30, 2014
Business Segments [Abstract]  
Business Segments [Table Text Block]
 
Consolidated

Regulated Operations

Investments and Other

Millions
 
 
 
For the Quarter Ended June 30, 2014
 
 
 
Operating Revenue

$260.7


$229.6


$31.1

Fuel and Purchased Power Expense
83.6

83.6

—

Operating and Maintenance Expense
115.1

89.0

26.1

Depreciation Expense
33.8

29.6

4.2

Operating Income
28.2

27.4

0.8

Interest Expense
(13.5
)
(11.4
)
(2.1
)
Equity Earnings in ATC
5.2

5.2

—

Other Income (Expense)
1.9

2.0

(0.1
)
Income (Loss) Before Non-Controlling Interest and Income Taxes
21.8

23.2

(1.4
)
Income Tax Expense (Benefit)
4.9

5.7

(0.8
)
Net Income (Loss)
16.9

17.5

(0.6
)
Less: Non-Controlling Interest in Subsidiaries
0.1

—

0.1

Net Income (Loss) Attributable to ALLETE

$16.8


$17.5

$(0.7)
 
 
 
 
 
Consolidated

Regulated Operations

Investments and Other

Millions
 
 
 
For the Quarter Ended June 30, 2013
 
 
 
Operating Revenue

$235.6


$215.8


$19.8

Fuel and Purchased Power Expense
78.7

78.7

—

Operating and Maintenance Expense
103.8

82.8

21.0

Depreciation Expense
28.7

27.1

1.6

Operating Income (Loss)
24.4

27.2

(2.8
)
Interest Expense
(12.8
)
(10.4
)
(2.4
)
Equity Earnings in ATC
5.0

5.0

—

Other Income
1.5

1.1

0.4

Income (Loss) Before Non-Controlling Interest and Income Taxes
18.1

22.9

(4.8
)
Income Tax Expense (Benefit)
4.1

6.6

(2.5
)
Net Income (Loss)
14.0

16.3

(2.3
)
Less: Non-Controlling Interest in Subsidiaries
—

—

—

Net Income (Loss) Attributable to ALLETE

$14.0


$16.3

$(2.3)
 
 
 
 
 
Consolidated

Regulated Operations

Investments and Other

Millions
 
 
 
For the Six Months Ended June 30, 2014
 
 
 
Operating Revenue

$557.2


$493.8


$63.4

Fuel and Purchased Power Expense
179.8

179.8

—

Operating and Maintenance Expense
234.9

179.2

55.7

Depreciation Expense
66.0

58.4

7.6

Operating Income
76.5

76.4

0.1

Interest Expense
(26.3
)
(22.9
)
(3.4
)
Equity Earnings in ATC
10.3

10.3

—

Other Income
3.9

3.8

0.1

Income (Loss) Before Non-Controlling Interest and Income Taxes
64.4

67.6

(3.2
)
Income Tax Expense (Benefit)
13.7

16.2

(2.5
)
Net Income (Loss)
50.7

51.4

(0.7
)
Less: Non-Controlling Interest in Subsidiaries
0.4

—

0.4

Net Income (Loss) Attributable to ALLETE

$50.3


$51.4

$(1.1)
 
 
 
 
As of June 30, 2014
 
 
 
Total Assets

$3,895.6


$3,424.3


$471.3

Property, Plant and Equipment – Net

$3,020.4


$2,791.7


$228.7

Accumulated Depreciation

$1,288.9


$1,221.1


$67.8

Capital Additions

$341.7


$335.6


$6.1

 
Consolidated

Regulated Operations

Investments and Other

Millions
 
 
 
For the Six Months Ended June 30, 2013
 
 
 
Operating Revenue

$499.4


$457.2


$42.2

Fuel and Purchased Power Expense
165.2

165.2

—

Operating and Maintenance Expense
208.5

165.0

43.5

Depreciation Expense
56.9

53.9

3.0

Operating Income (Loss)
68.8

73.1

(4.3
)
Interest Expense
(25.1
)
(21.1
)
(4.0
)
Equity Earnings in ATC
10.2

10.2

—

Other Income
4.2

2.2

2.0

Income (Loss) Before Non-Controlling Interest and Income Taxes
58.1

64.4

(6.3
)
Income Tax Expense (Benefit)
11.6

16.0

(4.4
)
Net Income (Loss)
46.5

48.4

(1.9
)
Less: Non-Controlling Interest in Subsidiaries
—

—

—

Net Income (Loss) Attributable to ALLETE

$46.5


$48.4

$(1.9)
 
 
 
 
As of June 30, 2013
 

 

 

Total Assets

$3,350.9


$2,997.0


$353.9

Property, Plant and Equipment – Net

$2,397.2


$2,329.6


$67.6

Accumulated Depreciation

$1,202.8


$1,143.2


$59.6

Capital Additions

$100.2


$97.2


$3.0