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Segment and Related Information (Tables)
 12 Months Ended
Dec. 31, 2015
Segment Reporting [Abstract]  
Financial data for business segments
Financial data for business segments and products and services for the years ended December 31, 2015, 2014, and 2013 was as follows:
 
Electric Utilities
 
 
 
 
 
 
 
Traditional
Operating
Companies
 
Southern
Power
 
Eliminations
 
Total
 
All
Other
 
Eliminations
 
Consolidated
 
(in millions)
2015
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
16,491

 
$
1,390

 
$
(439
)
 
$
17,442

 
$
152

 
$
(105
)
 
$
17,489

Depreciation and amortization
1,772

 
248

 
—

 
2,020

 
14

 
—

 
2,034

Interest income
19

 
2

 
1

 
22

 
6

 
(5
)
 
23

Interest expense
697

 
77

 
—

 
774

 
69

 
(3
)
 
840

Income taxes
1,305

 
21

 
—

 
1,326

 
(132
)
 
—

 
1,194

Segment net income (loss)(a) (b)
2,186

 
215

 
—

 
2,401

 
(32
)
 
(2
)
 
2,367

Total assets
69,052

 
8,905

 
(397
)
 
77,560

 
1,819

 
(1,061
)
 
78,318

Gross property additions
5,124

 
1,005

 
—

 
6,129

 
40

 
—

 
6,169

2014
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
17,354

 
$
1,501

 
$
(449
)
 
$
18,406

 
$
159

 
$
(98
)
 
$
18,467

Depreciation and amortization
1,709

 
220

 
—

 
1,929

 
16

 
—

 
1,945

Interest income
17

 
1

 
—

 
18

 
3

 
(2
)
 
19

Interest expense
705

 
89

 
—

 
794

 
43

 
(2
)
 
835

Income taxes
1,056

 
(3
)
 
—

 
1,053

 
(76
)
 
—

 
977

Segment net income (loss)(a) (b)
1,797

 
172

 
—

 
1,969

 
(3
)
 
(3
)
 
1,963

Total assets(c)
64,300

 
5,233

 
(131
)
 
69,402

 
1,143

 
(312
)
 
70,233

Gross property additions
5,568

 
942

 
—

 
6,510

 
11

 
1

 
6,522

2013
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating revenues
$
16,136

 
$
1,275

 
$
(376
)
 
$
17,035

 
$
139

 
$
(87
)
 
$
17,087

Depreciation and amortization
1,711

 
175

 
—

 
1,886

 
15

 
—

 
1,901

Interest income
17

 
1

 
—

 
18

 
2

 
(1
)
 
19

Interest expense
714

 
74

 
—

 
788

 
36

 
—

 
824

Income taxes
889

 
46

 
—

 
935

 
(85
)
 
(1
)
 
849

Segment net income (loss)(a) (b)
1,486

 
166

 
—

 
1,652

 
(10
)
 
2

 
1,644

Total assets(c)
59,188

 
4,417

 
(101
)
 
63,504

 
1,064

 
(304
)
 
64,264

Gross property additions
5,226

 
633

 
—

 
5,859

 
9

 
—

 
5,868


(a)
Attributable to Southern Company.
(b)
Segment net income (loss) for the traditional operating companies includes pre-tax charges for estimated probable losses on the Kemper IGCC of $365 million ($226 million after tax) in 2015, $868 million ($536 million after tax) in 2014, and $1.2 billion ($729 million after tax) in 2013. See Note 3 under "Integrated Coal Gasification Combined Cycle – Kemper IGCC Schedule and Cost Estimate" for additional information.
(c)
Net of $202 million and $139 million of unamortized debt issuance costs as of December 31, 2014 and 2013, respectively. Also net of $488 million and $143 million of deferred tax assets as of December 31, 2014 and 2013, respectively. See Note 1 under "Recently Issued Accounting Standards" for additional information.
Financial data for products and services
Products and Services
Electric Utilities' Revenues
Year
 
Retail
 
Wholesale
 
Other
 
Total
 
 
(in millions)
2015
 
$
14,987

 
$
1,798

 
$
657

 
$
17,442

2014
 
15,550

 
2,184

 
672

 
18,406

2013
 
14,541

 
1,855

 
639

 
17,035