SEGMENT OF BUSINESS INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	$ 704	$ 714	$ 1,898	$ 1,851
Intersegment Revenue	0	0
Operating Income	255	238	738	647
Regulated Operating Revenue, Gas	128	109	667	513
Regulated and Unregulated Operating Revenue	1,051	1,038	3,378	3,054
Income Available to Common Shareholders of SCANA	131	122	368	315
Segment Assets	14,997		14,997		14,616
Electric Operations
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	704	714	1,898	1,851
Intersegment Revenue	2	2	6	7
Operating Income	257	243	588	534
Segment Assets	9,430		9,430		8,989
Gas Distribution
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0	0	0
Operating Income	(6)	(7)	94	81
Regulated and Unregulated Operating Revenue	123	107	657	507
Segment Assets	2,286		2,286		2,292
Retail Gas Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0	0	0
Regulated and Unregulated Operating Revenue	67	64	325	288
Income Available to Common Shareholders of SCANA	(2)	(5)	16	3
Segment Assets	131		131		153
Energy Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	44	35	133	84
Regulated and Unregulated Operating Revenue	152	151	488	402
Income Available to Common Shareholders of SCANA	1	1	5	5
Segment Assets	124		124		122
All Other [member]
Segment Reporting Information [Line Items]
Intersegment Revenue	95	100	303	309
Operating Income	8	6	22	17
Regulated and Unregulated Operating Revenue	11	11	30	32
Income Available to Common Shareholders of SCANA	(3)	(3)	(2)	(2)
Segment Assets	1,287		1,287		1,415
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Intersegment Revenue	(141)	(137)	(442)	(400)
Operating Income	(4)	(4)	34	15
Regulated and Unregulated Operating Revenue	(6)	(9)	(20)	(26)
Income Available to Common Shareholders of SCANA	135	129	349	309
Segment Assets	1,739		1,739		1,645
SCEG
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	706	716	1,903	1,857
Operating Income	255	241	625	561
Regulated Operating Revenue, Gas	70	61	297	244
Net Income (Loss) Attributable to Parent	136	129	311	272
Segment Assets	12,694		12,694		12,104
Regulated Operating Revenue	776	777	2,200	2,101
SCEG | Electric Operations
Segment Reporting Information [Line Items]
Electric Domestic Regulated Revenue	706	716	1,903	1,857
Operating Income	257	244	588	534
Segment Assets	9,430		9,430		8,989
SCEG | Gas Distribution
Segment Reporting Information [Line Items]
Operating Income	(2)	(3)	37	27
Regulated Operating Revenue, Gas	70	61	297	244
Segment Assets	681		681		659
SCEG | Adjustments/Eliminations
Segment Reporting Information [Line Items]
Operating Income		0		0
Net Income (Loss) Attributable to Parent	136	129	311	272
Segment Assets	2,583		2,583		2,456
Regulated Operating Revenue		$ 0	$ 0	$ 0