SEGMENT OF BUSINESS INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Segment Reporting Information [Line Items]
Intersegment Revenue	$ 0	$ 0	$ 0
Operating Income	171	142	409	390
Regulated and Unregulated Operating Revenue	908	1,000	2,015	2,281
Income Available to Common Shareholders of SCANA	72	56	193	184
Segment Assets	13,749		13,749		13,534
Electric Operations
Segment Reporting Information [Line Items]
Intersegment Revenue	3	2	5	4
Operating Income	164	140	291	262
Regulated and Unregulated Operating Revenue	592	616	1,137	1,174
Segment Assets	8,589		8,589		8,222
Gas Distribution
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0	0
Operating Income	5	2	88	86
Regulated and Unregulated Operating Revenue	126	132	400	492
Segment Assets	2,201		2,201		2,179
Retail Gas Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	0	0	0
Regulated and Unregulated Operating Revenue	71	78	224	280
Income Available to Common Shareholders of SCANA	(3)	(3)	8	19
Segment Assets	141		141		185
Energy Marketing
Segment Reporting Information [Line Items]
Intersegment Revenue	23	52	49	97
Regulated and Unregulated Operating Revenue	118	172	250	330
Income Available to Common Shareholders of SCANA	2	1	4	2
Segment Assets	93		93		114
All Other [member]
Segment Reporting Information [Line Items]
Intersegment Revenue	103	104	209	206
Operating Income	4	3	11	8
Regulated and Unregulated Operating Revenue	10	10	21	20
Income Available to Common Shareholders of SCANA	(4)	0	1	1
Segment Assets	1,250		1,250		1,377
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Intersegment Revenue	(129)	(158)	(263)	(307)
Operating Income	(2)	(3)	19	34
Regulated and Unregulated Operating Revenue	(9)	(8)	(17)	(15)
Income Available to Common Shareholders of SCANA	77	58	180	162
Segment Assets	1,475		1,475		1,457
SCE&G
Segment Reporting Information [Line Items]
Regulated Operating Revenue	661	691	1,324	1,396
Operating Income	165	137	321	289
Net Income (Loss) Attributable to Parent	76	59	143	127
Segment Assets	11,431		11,431		11,037
SCE&G | Electric Operations
Segment Reporting Information [Line Items]
Regulated Operating Revenue	594	618	1,141	1,178
Operating Income	163	140	290	262
Segment Assets	8,589		8,589		8,222
SCE&G | Gas Distribution
Segment Reporting Information [Line Items]
Regulated Operating Revenue	67	73	183	218
Operating Income	2	(2)	31	28
Segment Assets	636		636		622
SCE&G | Adjustments/Eliminations
Segment Reporting Information [Line Items]
Operating Income	0	(1)		(1)
Net Income (Loss) Attributable to Parent	76	59	143	127
Segment Assets	$ 2,206		$ 2,206		$ 2,193