COMMON EQUITY (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2010
Schedule of Capitalization, Equity [Line Items]
Common Stock, Shares Authorized	200		200				200
COMMON EQUITY [Abstract]
Common Shareholders' Equity	$ 4,095		$ 4,095				$ 3,889
Forward Contract Indexed to Issuer's Equity, Indexed Shares									6.6
Dividends declared			(194)		(188)
Total Comprehensive Income (Loss)	126	74	327	[1]	251	[1]
Common Stock, Shares, Outstanding	131.5		131.5				129.9
Losses on cash flow hedging activities reclassified to net income	3	2	17		8
Common stock issued			73		73
Common Stockholders' Equity		3,838			3,838			3,702
SCE&G
Schedule of Capitalization, Equity [Line Items]
Common Stock, Shares Authorized	50		50				50
COMMON EQUITY [Abstract]
Stockholders' Equity Attributable to Noncontrolling Interest	112		112				108
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,976	3,714	3,976		3,714		3,773	3,541
Contributions from parent			84		73
Dividends			(162)		(151)
Total Comprehensive Income (Loss)			281		251
Common Stock, Shares, Outstanding	40.3		40.3
SCE&G (including Fuel Company)
COMMON EQUITY [Abstract]
Contributions from parent			84		73
Dividends			(157)		(146)
Common Shareholders' Equity	3,864	3,608	3,864		3,608		3,665	3,437
Total Comprehensive Income (Loss)	129	117	272		244
Genco
COMMON EQUITY [Abstract]
Stockholders' Equity Attributable to Noncontrolling Interest	112	106	112		106		108	104
Contributions from parent			0		0
Dividends			(5)		(5)
Total Comprehensive Income (Loss)			$ 9		$ 7

[1] (1) Accumulated other comprehensive loss totaled $81.8 million as of September 30, 2012 and $93.8 million as of December 31, 2011.