CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating Revenues:
Electric Domestic Regulated Revenue	$ 592	$ 616	$ 1,137	$ 1,174
Gas-regulated	127	135	404	497
Gas-nonregulated	189	249	474	610
Regulated and Unregulated Operating Revenue	908	1,000	2,015	2,281
Operating Expenses [Abstract]
Fuel used in electric generation	198	251	379	462
Purchased power	4	8	10	10
Gas purchased for resale	223	297	588	810
Other operation and maintenance	170	165	345	334
Depreciation and amortization	89	86	178	172
Other taxes	53	51	106	103
Total Operating Expenses	737	858	1,606	1,891
Operating Income	171	142	409	390
Other Income (Expense):
Other income	12	11	26	24
Other expenses	(9)	(9)	(19)	(19)
Interest charges, net of allowance for borrowed funds used during construction	(73)	(70)	(145)	(139)
Allowance for equity funds used during construction	4	5	7	8
Total Other Expense	(66)	(63)	(131)	(126)
Income Before Income Tax Expense	105	79	278	264
Income Tax Expense	33	23	85	80
Income Available to Common Shareholders	72	56	193	184
Per Common Share Data
Basic Earnings Per Share of Common Stock (in dollars per share)	$ 0.55	$ 0.44	$ 1.48	$ 1.44
Diluted Earnings Per Share of Common Stock (in dollars per share)	$ 0.54	$ 0.43	$ 1.46	$ 1.42
Weighted Average Common Shares Outstanding (millions)
Weighted Average Number of Shares Outstanding, Basic	130.9	128.5	130.6	128.2
Weighted Average Number of Shares Outstanding, Diluted	133.1	129.7	132.7	129.4
Dividends Declared Per Share of Common Stock (in dollars per share)	$ 0.495	$ 0.485	$ 0.990	$ 0.970
SCE&G
Operating Revenues:
Electric Domestic Regulated Revenue	594	618	1,141	1,178
Gas-regulated	67	73	183	218
Total Operating Revenues	661	691	1,324	1,396
Operating Expenses [Abstract]
Fuel used in electric generation	199	252	382	465
Purchased power	4	8	10	10
Gas purchased for resale	37	49	96	136
Other operation and maintenance	134	127	272	260
Depreciation and amortization	74	71	147	142
Other taxes	48	47	96	94
Total Operating Expenses	496	554	1,003	1,107
Operating Income	165	137	321	289
Other Income (Expense):
Other income	0	1	0	2
Other expenses	(3)	(3)	(7)	(7)
Interest charges, net of allowance for borrowed funds used during construction	(52)	(50)	(103)	(100)
Allowance for equity funds used during construction	4	5	7	8
Total Other Expense	(51)	(47)	(103)	(97)
Income Before Income Tax Expense	114	90	218	192
Income Tax Expense	36	29	69	60
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	78	61	149	132
Net Income (Loss) Attributable to Noncontrolling Interest	2	2	6	5
Net Income (Loss) Attributable to Parent	76	59	143	127
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock, Cash	54	49	107	100
Retail Gas Marketing
Operating Revenues:
Regulated and Unregulated Operating Revenue	71	78	224	280
Other Income (Expense):
Income Available to Common Shareholders	(3)	(3)	8	19
Adjustments/Eliminations
Operating Revenues:
Regulated and Unregulated Operating Revenue	(9)	(8)	(17)	(15)
Operating Expenses [Abstract]
Operating Income	(2)	(3)	19	34
Other Income (Expense):
Income Available to Common Shareholders	77	58	180	162
Adjustments/Eliminations | SCE&G
Operating Expenses [Abstract]
Operating Income	0	(1)		(1)
Other Income (Expense):
Net Income (Loss) Attributable to Parent	76	59	143	127
Electric Operations
Operating Revenues:
Regulated and Unregulated Operating Revenue	592	616	1,137	1,174
Operating Expenses [Abstract]
Operating Income	164	140	291	262
Electric Operations | SCE&G
Operating Revenues:
Total Operating Revenues	594	618	1,141	1,178
Operating Expenses [Abstract]
Operating Income	163	140	290	262
Energy Marketing
Operating Revenues:
Regulated and Unregulated Operating Revenue	118	172	250	330
Other Income (Expense):
Income Available to Common Shareholders	$ 2	$ 1	$ 4	$ 2