COMMON EQUITY (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2010
Schedule of Capitalization, Equity [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	$ (1)		$ (4)	$ (5)	$ (14)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(1)		(1)	(1)	(1)
OtherComprehensiveIncomeLossTotalReclassificationAdjustmentIncludedInNetIncomeNetOFTax	(2)		(5)	(6)	(15)
Common Stock, Shares Authorized	200,000,000			200,000,000		200,000,000
COMMON EQUITY [Abstract]
Common Shareholders' Equity	4,506			4,506		4,154
Forward Contract Indexed to Issuer's Equity, Indexed Shares								6,600,000
Dividends declared				(141)	(130)
Total Comprehensive Income (Loss)	87		74	246	201
Common Stock, Shares, Outstanding	139,700,000			139,700,000		132,000,000
Proceeds from exercise of equity forward sales agreements		196.2
Common stock issued				247	50
Common Stockholders' Equity			4,010		4,010		3,889
SCEG
Schedule of Capitalization, Equity [Line Items]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0		0	0	0
Common Stock, Shares Authorized	50,000,000			50,000,000		50,000,000
COMMON EQUITY [Abstract]
Stockholders' Equity Attributable to Noncontrolling Interest	116			116		114
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	4,350		3,866	4,350	3,866	4,043	3,773
Proceeds from Contributions from Parent				255	51
Dividends				(128)	(107)
Total Comprehensive Income (Loss)				180	149
Common Stock, Shares, Outstanding	40,300,000			40,300,000		40,300,000
Preferred Stock, Shares Authorized	20,000,000			20,000,000		20,000,000
Preferred Stock, Shares Outstanding	1,000			1,000		1,000
SCE&G (including Fuel Company)
COMMON EQUITY [Abstract]
Proceeds from Contributions from Parent				255	51
Dividends				(124)	(103)
Common Shareholders' Equity	4,234		3,756	4,234	3,756	3,929	3,665
Total Comprehensive Income (Loss)	85		76	174	143
Genco
COMMON EQUITY [Abstract]
Stockholders' Equity Attributable to Noncontrolling Interest	116		110	116	110	114	108
Proceeds from Contributions from Parent				0	0
Dividends				(4)	(4)
Total Comprehensive Income (Loss)				6	6
Interest Rate Contract
Schedule of Capitalization, Equity [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(1)		(1)	(3)	(3)
Commodity Contract
Schedule of Capitalization, Equity [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	$ 0		$ (3)	$ (2)	$ (11)