CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating Revenues:
Electric Domestic Regulated Revenue	$ 610	$ 592	$ 1,193	$ 1,137
Regulated Operating Revenue, Gas	158	127	540	404
Gas-nonregulated	248	189	594	474
Regulated and Unregulated Operating Revenue	1,016	908	2,327	2,015
Operating Expenses [Abstract]
Fuel used in electric generation	188	198	374	379
Purchased power	9	4	16	10
Gas purchased for resale	310	223	811	588
Other operation and maintenance	171	170	347	345
Depreciation and amortization	94	89	188	178
Other taxes	55	53	109	106
Total Operating Expenses	827	737	1,845	1,606
Operating Income	189	171	482	409
Other Income (Expense):
Interest Expense	(74)	(73)	(148)	(145)
Other income	12	12	25	26
Other expenses	(10)	(9)	(22)	(19)
Allowance for equity funds used during construction	6	4	10	7
Total Other Expense	(66)	(66)	(135)	(131)
Income Before Income Tax Expense	(123)	(105)	(347)	(278)
Income Tax Expense	38	33	110	85
Income Available to Common Shareholders	85	72	237	193
Per Common Share Data
Basic Earnings Per Share of Common Stock (in dollars per share)	$ 0.60	$ 0.55	$ 1.73	$ 1.48
Diluted Earnings Per Share of Common Stock (in dollars per share)	$ 0.60	$ 0.54	$ 1.72	$ 1.46
Weighted Average Common Shares Outstanding (millions)
Weighted Average Number of Shares Outstanding, Basic	139.6	130.9	137.0	130.6
Weighted Average Number of Shares Outstanding, Diluted	139.6	133.1	137.9	132.7
Dividends Declared Per Share of Common Stock (in dollars per share)	$ 0.5075	$ 0.495	$ 1.015	$ 0.990
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	612	594	1,197	1,141
Regulated Operating Revenue, Gas	84	67	227	183
Regulated Operating Revenue	696	661	1,424	1,324
Operating Expenses [Abstract]
Fuel used in electric generation	189	199	377	382
Purchased power	9	4	16	10
Gas purchased for resale	54	37	131	96
Other operation and maintenance	135	134	274	272
Depreciation and amortization	79	74	156	147
Other taxes	50	48	99	96
Total Operating Expenses	516	496	1,053	1,003
Operating Income	180	165	371	321
Other Income (Expense):
Interest Expense	(54)	(52)	(108)	(103)
Other expenses	(4)	(3)	(7)	(7)
Allowance for equity funds used during construction	6	4	9	7
Total Other Expense	(52)	(51)	(106)	(103)
Income Before Income Tax Expense	(128)	(114)	(265)	(218)
Income Tax Expense	40	36	85	69
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	88	78	180	149
Net Income (Loss) Attributable to Noncontrolling Interest	(3)	(2)	(6)	(6)
Net Income (Loss) Attributable to Parent	85	76	174	143
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock, Cash	$ 64	$ 54	$ 128	$ 107