SEGMENT OF BUSINESS INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2011	Dec. 31, 2012
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	$ 583	$ 545
Intersegment Revenue	0
Operating Income	293	238
Regulated Operating Revenue, Gas	382	277
Regulated and Unregulated Operating Revenue	1,311	1,107
Income Available to Common Shareholders of SCANA	151	121
Segment Assets	14,757			14,616
Electric Operations
Segment Reporting Information [Line Items]
Intersegment Revenue	2	2
Operating Income	153	127
Segment Assets	9,111			8,989
Gas Distribution
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0
Operating Income	93	83
Regulated and Unregulated Operating Revenue	379	274
Segment Assets	2,308			2,292
Retail Gas Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	0
Regulated and Unregulated Operating Revenue	179	153
Income Available to Common Shareholders of SCANA	22	11
Segment Assets	188			153
Energy Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	42	26
Regulated and Unregulated Operating Revenue	167	132
Income Available to Common Shareholders of SCANA	3	2
Segment Assets	129			122
All Other [member]
Segment Reporting Information [Line Items]
Intersegment Revenue	107	106
Operating Income	7	7
Regulated and Unregulated Operating Revenue	12	11
Income Available to Common Shareholders of SCANA	3	5
Segment Assets	1,455			1,415
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Intersegment Revenue	(151)	(134)
Operating Income	40	21
Regulated and Unregulated Operating Revenue	(9)	(8)
Income Available to Common Shareholders of SCANA	123	103
Segment Assets	1,566			1,645
SCEG
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	585	547
ERROR in label resolution.	728	663	663
Operating Income	191	156	156
Regulated Operating Revenue, Gas	143	116
Net Income (Loss) Attributable to Parent	89	69	69
Segment Assets	12,278			12,104
SCEG | Electric Operations
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	585	547
Operating Income	153	127
Segment Assets	9,111
SCEG | Gas Distribution
Segment Reporting Information [Line Items]
Operating Income	38	29
Regulated Operating Revenue, Gas	143	116
Segment Assets	664
SCEG | Adjustments/Eliminations
Segment Reporting Information [Line Items]
Operating Income	0		0
Net Income (Loss) Attributable to Parent	89	69
Segment Assets	$ 2,503