CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating Revenues:
Electric Domestic Regulated Revenue	$ 714	$ 728	$ 1,851	$ 1,903
Regulated Operating Revenue, Gas	109	115	513	613
Gas-nonregulated	215	249	690	858
Regulated and Unregulated Operating Revenue	1,038	1,092	3,054	3,374
Operating Expenses [Abstract]
Fuel used in electric generation	239	277	617	739
Purchased power	9	6	20	16
Gas purchased for resale	248	291	837	1,101
Other operation and maintenance	165	166	510	501
Depreciation and amortization	89	87	267	259
Other taxes	50	50	156	153
Total Operating Expenses	800	877	2,407	2,769
Operating Income	238	215	647	605
Other Income (Expense):
Other income	13	12	39	36
Other expenses	(9)	(10)	(29)	(29)
Interest charges, net of allowance for borrowed funds used during construction	(75)	(73)	(219)	(212)
Allowance for equity funds used during construction	6	5	13	13
Total Other Expense	(65)	(66)	(196)	(192)
Income Before Income Tax Expense	173	149	451	413
Income Tax Expense	51	44	136	124
Income Available to Common Shareholders	122	105	315	289
Per Common Share Data
Basic Earnings Per Share of Common Stock (in dollars per share)	$ 0.93	$ 0.81	$ 2.41	$ 2.25
Diluted Earnings Per Share of Common Stock (in dollars per share)	$ 0.91	$ 0.81	$ 2.37	$ 2.23
Weighted Average Common Shares Outstanding (millions)
Weighted Average Number of Shares Outstanding, Basic	131,400,000	129,100,000	130,800,000	128,500,000
Weighted Average Number of Shares Outstanding, Diluted	133,800,000	130,300,000	133,100,000	129,800,000
Dividends Declared Per Share of Common Stock (in dollars per share)	$ 0.495	$ 0.485	$ 1.485	$ 1.455
Gas Distribution
Operating Revenues:
Regulated and Unregulated Operating Revenue	107	114	507	606
Operating Expenses [Abstract]
Operating Income	(7)	(11)	81	75
Electric Operations
Operating Expenses [Abstract]
Operating Income	243	225	534	487
SCE&G
Operating Revenues:
Electric Domestic Regulated Revenue	716	730	1,857	1,908
Regulated Operating Revenue, Gas	61	67	244	285
Total Operating Revenues	777	797	2,101	2,193
Operating Expenses [Abstract]
Fuel used in electric generation	240	278	622	743
Purchased power	9	6	20	16
Gas purchased for resale	38	44	134	181
Other operation and maintenance	130	132	402	391
Depreciation and amortization	73	72	220	214
Other taxes	46	45	142	139
Total Operating Expenses	536	577	1,540	1,684
Operating Income	241	220	561	509
Other Income (Expense):
Other income	0	0	0	2
Other expenses	(3)	(3)	(9)	(9)
Interest charges, net of allowance for borrowed funds used during construction	(53)	(53)	(157)	(153)
Allowance for equity funds used during construction	5	5	12	12
Total Other Expense	(51)	(51)	(154)	(148)
Income Before Income Tax Expense	190	169	407	361
Income Tax Expense	58	50	126	110
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	132	119	281	251
Net Income (Loss) Attributable to Noncontrolling Interest	3	2	9	7
Net Income (Loss) Attributable to Parent	129	117	272	244
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock, Cash	56	51	163	150
SCE&G | Gas Distribution
Operating Expenses [Abstract]
Operating Income	(3)	(5)	27	23
SCE&G | Electric Operations
Operating Expenses [Abstract]
Operating Income	$ 244	$ 225	$ 534	$ 487