SEGMENT OF BUSINESS INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	$ 610	$ 592	$ 1,193	$ 1,137
Intersegment Revenue	0	0
Operating Income	189	171	482	409
Regulated Operating Revenue, Gas	158	127	540	404
Regulated and Unregulated Operating Revenue	1,016	908	2,327	2,015
Income Available to Common Shareholders of SCANA	85	72	237	193
Segment Assets	14,938		14,938		14,616
Electric Operations
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	610	592	1,193	1,137
Intersegment Revenue	2	3	4	5
Operating Income	178	164	331	291
Segment Assets	9,272		9,272		8,989
Gas Distribution
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0	0	0
Operating Income	7	5	100	88
Regulated and Unregulated Operating Revenue	155	126	534	400
Segment Assets	2,294		2,294		2,292
Retail Gas Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0	0	0
Regulated and Unregulated Operating Revenue	79	71	258	224
Income Available to Common Shareholders of SCANA	(3)	(3)	19	8
Segment Assets	162		162		153
Energy Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	47	23	89	49
Regulated and Unregulated Operating Revenue	169	118	336	250
Income Available to Common Shareholders of SCANA	1	2	4	4
Segment Assets	112		112		122
All Other [member]
Segment Reporting Information [Line Items]
Intersegment Revenue	101	103	208	209
Operating Income	6	4	13	11
Regulated and Unregulated Operating Revenue	7	10	19	21
Income Available to Common Shareholders of SCANA	(2)	(4)	1	1
Segment Assets	1,435		1,435		1,415
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Intersegment Revenue	(150)	(129)	(301)	(263)
Operating Income	(2)	(2)	38	19
Regulated and Unregulated Operating Revenue	(4)	(9)	(13)	(17)
Income Available to Common Shareholders of SCANA	89	77	213	180
Segment Assets	1,663		1,663		1,645
SCEG
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	612	594	1,197	1,141
Operating Income	180	165	371	321
Regulated Operating Revenue, Gas	84	67	227	183
Net Income (Loss) Attributable to Parent	85	76	174	143
Segment Assets	12,532		12,532		12,104
Regulated Operating Revenue	696	661	1,424	1,324
SCEG | Electric Operations
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	612	594	1,197	1,141
Operating Income	178	163	331	290
Segment Assets	9,272		9,272		8,989
SCEG | Gas Distribution
Segment Reporting Information [Line Items]
Operating Income	2	2	40	31
Regulated Operating Revenue, Gas	84	67	227	183
Segment Assets	673		673		659
SCEG | Adjustments/Eliminations
Segment Reporting Information [Line Items]
Operating Income		0		0
Net Income (Loss) Attributable to Parent	85	76	174	143
Segment Assets	2,587		2,587		2,456
Regulated Operating Revenue		$ 0	$ 0	$ 0