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Segment and Related Information (Tables)
 12 Months Ended
Dec. 31, 2012
Segment Reporting [Abstract]  
Financial data for business segments
All other intersegment revenues are not material. Financial data for business segments and products and services was as follows:
 
 
Electric Utilities
 
 
 
 
 
 
 
Traditional
Operating
Companies
 
Southern
Power
 
Eliminations
 
Total
 
All
Other
 
Eliminations
 
Consolidated  
 
(in millions)
2012
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
15,730

 
$
1,186

 
$
(438
)
 
$
16,478

 
$
141

 
$
(82
)
 
$
16,537

Depreciation and amortization
1,629

 
143

 
—

 
1,772

 
15

 
—

 
1,787

Interest income
21

 
1

 
—

 
22

 
19

 
(1
)
 
40

Interest expense
757

 
63

 
—

 
820

 
39

 
—

 
859

Income taxes
1,307

 
93

 
—

 
1,400

 
(66
)
 
—

 
1,334

Segment net income (loss)*
2,145

 
175

 
1

 
2,321

 
33

 
(4
)
 
2,350

Total assets
58,600

 
3,780

 
(129
)
 
62,251

 
1,116

 
(218
)
 
63,149

Gross property additions
4,813

 
241

 
—

 
5,054

 
5

 
—

 
5,059

2011
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
16,763

 
$
1,236

 
$
(412
)
 
$
17,587

 
$
149

 
$
(79
)
 
$
17,657

Depreciation and amortization
1,576

 
124

 
—

 
1,700

 
16

 
1

 
1,717

Interest income
18

 
1

 
—

 
19

 
3

 
(1
)
 
21

Interest expense
726

 
77

 
—

 
803

 
54

 
—

 
857

Income taxes
1,217

 
76

 
—

 
1,293

 
(74
)
 
—

 
1,219

Segment net income (loss)*
2,052

 
162

 
—

 
2,214

 
(8
)
 
(3
)
 
2,203

Total assets
54,622

 
3,581

 
(127
)
 
58,076

 
1,592

 
(401
)
 
59,267

Gross property additions
4,589

 
255

 
—

 
4,844

 
9

 
—

 
4,853

2010
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
16,712

 
$
1,130

 
$
(468
)
 
$
17,374

 
$
162

 
$
(80
)
 
$
17,456

Depreciation and amortization
1,376

 
119

 
—

 
1,495

 
18

 
—

 
1,513

Interest income
22

 
—

 
—

 
22

 
3

 
(1
)
 
24

Interest expense
757

 
76

 
—

 
833

 
63

 
(1
)
 
895

Income taxes
1,039

 
75

 
—

 
1,114

 
(89
)
 
1

 
1,026

Segment net income (loss)*
1,860

 
131

 
—

 
1,991

 
(11
)
 
(5
)
 
1,975

Total assets
51,144

 
3,438

 
(128
)
 
54,454

 
1,178

 
(600
)
 
55,032

Gross property additions
4,029

 
405

 
—

 
4,434

 
9

 
—

 
4,443

*
After dividends on preferred and preference stock of subsidiaries.
Financial data for products and services
Products and Services
Electric Utilities' Revenues
Year
 
Retail
 
Wholesale
 
Other
 
Total        

 
 
(in millions)
2012
 
$
14,187

 
$
1,675

 
$
616

 
$
16,478

2011
 
$
15,071

 
$
1,905

 
$
611

 
$
17,587

2010
 
$
14,791

 
$
1,994

 
$
589

 
$
17,374