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SEGMENT OF BUSINESS INFORMATION (Tables)
 6 Months Ended
Jun. 30, 2013
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
s.
Millions of dollars
 
External
Revenue
 
Intersegment
Revenue
 
Operating
Income
 
Net
Income
Three Months Ended June 30, 2013
 
 
 
 
 
 
 
 
Electric Operations
 
$
610

 
$
2

 
$
178

 
n/a

Gas Distribution
 
155

 
—

 
7

 
n/a

Retail Gas Marketing
 
79

 
—

 
—

 
$
(3
)
Energy Marketing
 
169

 
47

 
—

 
1

All Other
 
7

 
101

 
6

 
(2
)
Adjustments/Eliminations
 
(4
)
 
(150
)
 
(2
)
 
89

Consolidated Total
 
$
1,016

 
$
—

 
$
189

 
$
85

Six Months Ended June 30, 2013
 
 
 
 
 
 
 
 
Electric Operations
 
$
1,193

 
$
4

 
$
331

 
n/a

Gas Distribution
 
534

 
—

 
100

 
n/a

Retail Gas Marketing
 
258

 
—

 
—

 
$
19

Energy Marketing
 
336

 
89

 
—

 
4

All Other
 
19

 
208

 
13

 
1

Adjustments/Eliminations
 
(13
)
 
(301
)
 
38

 
213

Consolidated Total
 
$
2,327

 
$
—

 
$
482

 
$
237

Three Months Ended June 30, 2012
 
 
 
 
 
 
 
 
Electric Operations
 
$
592

 
$
3

 
$
164

 
n/a

Gas Distribution
 
126

 
—

 
5

 
n/a

Retail Gas Marketing
 
71

 
—

 
n/a

 
$
(3
)
Energy Marketing
 
118

 
23

 
n/a

 
2

All Other
 
10

 
103

 
4

 
(4
)
Adjustments/Eliminations
 
(9
)
 
(129
)
 
(2
)
 
77

Consolidated Total
 
$
908

 
$
—

 
$
171

 
$
72

Six Months Ended June 30, 2012
 
 
 
 
 
 
 
 
Electric Operations
 
$
1,137

 
$
5

 
$
291

 
n/a

Gas Distribution
 
400

 
—

 
88

 
n/a

Retail Gas Marketing
 
224

 
—

 
n/a

 
$
8

Energy Marketing
 
250

 
49

 
n/a

 
4

All Other
 
21

 
209

 
11

 
1

Adjustments/Eliminations
 
(17
)
 
(263
)
 
19

 
180

Consolidated Total
 
$
2,015

 
$
—

 
$
409

 
$
193

 
 
June 30,
 
December 31,
 
 
 
 
Segment Assets
 
2013
 
2012
 
 
 
 
Electric Operations
 
$
9,272

 
$
8,989

 
 
 
 
Gas Distribution
 
2,294

 
2,292

 
 
 
 
Retail Gas Marketing
 
162

 
153

 
 
 
 
Energy Marketing
 
112

 
122

 
 
 
 
All Other
 
1,435

 
1,415

 
 
 
 
Adjustments/Eliminations
 
1,663

 
1,645

 
 
 
 
Consolidated Total
 
$
14,938

 
$
14,616

 
 
 
 
SCEG
  
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
.

 
 
External
 
Operating
 
Earnings Available to
Millions of dollars
 
Revenue
 
Income
 
Common Shareholder
Three Months Ended June 30, 2013
 
 
 
 
 
 
Electric Operations
 
$
612

 
$
178

 
n/a

Gas Distribution
 
84

 
2

 
n/a

Adjustments/Eliminations
 
—

 
—

 
$
85

Consolidated Total
 
$
696

 
$
180

 
$
85

Six Months Ended June 30, 2013
 
 

 
 

 
 

Electric Operations
 
$
1,197

 
$
331

 
n/a

Gas Distribution
 
227

 
40

 
n/a

Adjustments/Eliminations
 
—

 
—

 
$
174

Consolidated Total
 
$
1,424

 
$
371

 
$
174

Three Months Ended June 30, 2012
 
 
 
 
 
 
Electric Operations
 
$
594

 
$
163

 
n/a

Gas Distribution
 
67

 
2

 
n/a

Adjustments/Eliminations
 
—

 
—

 
$
76

Consolidated Total
 
$
661

 
$
165

 
$
76


Six Months Ended June 30, 2012
 
 

 
 

 
 

Electric Operations
 
$
1,141

 
$
290

 
n/a

Gas Distribution
 
183

 
31

 
n/a

Adjustments/Eliminations
 
—

 
—

 
$
143

Consolidated Total
 
$
1,324

 
$
321

 
$
143


 
 
June 30,
 
December 31,
 
 
Segment Assets
 
2013
 
2012
 
 
Electric Operations
 
$
9,272

 
$
8,989

 
 
Gas Distribution
 
673

 
659

 
 
Adjustments/Eliminations
 
2,587

 
2,456

 
 
Consolidated Total
 
$
12,532

 
$
12,104