SEGMENT OF BUSINESS INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Assets	$ 15,164				$ 14,616				$ 15,164	$ 14,616	$ 13,534
Additions to Other Assets, Amount									1,106	1,077	946
Deferred Tax Assets, Gross	0				(11)				0	(11)	(26)
Electric Domestic Regulated Revenue									2,423	2,446	2,424
Regulated and Unregulated Operating Revenue	1,117	1,051	1,016	1,311	1,123	1,038	908	1,107	4,495	4,176	4,409
Intersegment Revenue									0	0	0
Operating Income	173	255	189	293	212	238	171	238	910	859	813
Interest Expense									297	295	284
Depreciation, Depletion and Amortization									378	356	346
Income Tax Expense (Benefit)									223	182	168
Income Available to Common Stockholders, Basic	104	131	85	151	105	122	72	121	471	420	387
Regulated Operating Revenue, Gas									955	774	849
Electric Operations
Segment Reporting Information [Line Items]
Assets	9,488								9,488		8,222
Additions to Other Assets, Amount									907		806
Deferred Tax Assets, Gross	(10)				(9)				(10)	(9)	(9)
Intersegment Revenue									6	7	8
Operating Income									679		616
Interest Expense									19	21	23
Depreciation, Depletion and Amortization									297		271
Income Tax Expense (Benefit)									6	7	5
Gas Distribution
Segment Reporting Information [Line Items]
Assets	2,340				2,292				2,340	2,292	2,179
Additions to Other Assets, Amount									140	123	140
Deferred Tax Assets, Gross	(27)				(26)				(27)	(26)	(12)
Regulated and Unregulated Operating Revenue									942	764	840
Intersegment Revenue									1	1	1
Operating Income									153	141	132
Interest Expense									22	23	24
Depreciation, Depletion and Amortization									70	67	65
Income Tax Expense (Benefit)									33	32	30
Retail Gas and Energy Marketing Segment [Member]
Segment Reporting Information [Line Items]
Assets	133				122				133	122	114
Additions to Other Assets, Amount									1	1	1
Deferred Tax Assets, Gross	(2)				(4)				(2)	(4)	(9)
Regulated and Unregulated Operating Revenue									652	543	657
Intersegment Revenue									167	125	188
Income Tax Expense (Benefit)									4	3	3
Income Available to Common Stockholders, Basic									6	5	4
All Other [member]
Segment Reporting Information [Line Items]
Assets	1,378				1,415				1,378	1,415	1,377
Additions to Other Assets, Amount									31	14	17
Deferred Tax Assets, Gross	(14)				(17)				(14)	(17)	(17)
Regulated and Unregulated Operating Revenue									40	45	41
Intersegment Revenue									416	416	406
Operating Income									27	22	18
Interest Expense									4	3	3
Depreciation, Depletion and Amortization									26	25	25
Income Tax Expense (Benefit)									14	15	10
Income Available to Common Stockholders, Basic									(2)	1	(6)
Retail Gas Marketing
Segment Reporting Information [Line Items]
Assets	172				153				172	153	185
Additions to Other Assets, Amount									0	0	0
Deferred Tax Assets, Gross	(8)				(10)				(8)	(10)	(9)
Regulated and Unregulated Operating Revenue									465	413	479
Intersegment Revenue									0	0	0
Interest Expense									1	1	1
Depreciation, Depletion and Amortization									3	3	3
Income Tax Expense (Benefit)									15	7	16
Income Available to Common Stockholders, Basic									24	11	24
Adjustments/Eliminations
Segment Reporting Information [Line Items]
Assets	1,653				1,645				1,653	1,645	1,457
Additions to Other Assets, Amount									27	(60)	(18)
Deferred Tax Assets, Gross	61				55				61	55	30
Regulated and Unregulated Operating Revenue									(27)	(35)	(32)
Intersegment Revenue									(590)	(549)	(603)
Operating Income									51	28	47
Interest Expense									251	247	233
Depreciation, Depletion and Amortization									(18)	(17)	(18)
Income Tax Expense (Benefit)									151	118	104
Income Available to Common Stockholders, Basic									443	403	365
SCE&G
Segment Reporting Information [Line Items]
Assets	12,700				12,104				12,700	12,104	11,037
Additions to Other Assets, Amount									1,003	978	848
Deferred Tax Assets, Gross	0				0				0	0	(8)
Electric Domestic Regulated Revenue									2,431	2,453	2,432
Regulated Operating Revenue	645	776	696	728	708	777	661	663	2,845	2,809	2,819
Operating Income	111	255	180	191	155	241	165	156	737	717	654
Interest Expense									217	211	204
Depreciation, Depletion and Amortization									313	293	286
Income Tax Expense (Benefit)									189	157	140
Regulated Operating Revenue, Gas									414	356	387
SCE&G | Electric Operations
Segment Reporting Information [Line Items]
Assets	9,488				8,989				9,488	8,989	8,222
Additions to Other Assets, Amount									907	999	806
Deferred Tax Assets, Gross	(10)								(10)		(9)
Operating Income									679	668	616
Interest Expense									19	21	23
Depreciation, Depletion and Amortization									294	278	271
SCE&G | Gas Distribution
Segment Reporting Information [Line Items]
Assets	686				659				686	659	622
Additions to Other Assets, Amount									45	56	60
Regulated and Unregulated Operating Revenue									414	356	387
Operating Income									58	49	40
Interest Expense									0	0	0
Depreciation, Depletion and Amortization									26	25	25
SCE&G | Adjustments/Eliminations
Segment Reporting Information [Line Items]
Assets	2,526				2,456				2,526	2,456	2,193
Additions to Other Assets, Amount									51	(77)	(18)
Deferred Tax Assets, Gross	(10)				(9)				(10)	(9)	(1)
Operating Income											(2)
Interest Expense									198	190	181
Depreciation, Depletion and Amortization									$ (7)	$ (10)	$ (10)