COMMON EQUITY (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	May 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Schedule of Capitalization, Equity [Line Items]
Retained Earnings, Appropriated		$ 61.0
Common Stock, Shares Authorized		200,000,000	200,000,000
COMMON EQUITY [Abstract]
Dividends declared		(260)	(250)	(239)
Total Comprehensive Income (Loss)		428	340	384
Common Stock, Dividends, Per Share, Declared		$ 1.98	$ 1.94	$ 1.90
Accumulated Other Comprehensive Income (Loss), Net of Tax		(86)	(94)	(47)	(55)
Stock Issued During Period, Value, Other	59.2
Accumulated balances related to each component of other comprehensive income (loss)
Net unrealized losses on cash flow hedging activities, net of taxes of $50 and $22		(70)	(81)
Net unrealized deferred costs of employee benefit plans, net of taxes of $8 and $6		16	13
Tax effect on net unrealized losses on cash flow hedging activities		43	50
Tax effect on net unrealized deferred costs of employee benefit plans		10	8
Losses on cash flow hedging activities reclassified to net income		(19)	(13)	(17)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net			7	12
Common stock issued through various compensation and dividend reinvestment plans, including the Stock Purchase Savings Plan		97.7	97.8	91.1
Common stock issued		97	97	149
Number of shares underlying forward sales contracts (in shares)	6,600,000
SCE&G
Schedule of Capitalization, Equity [Line Items]
Retained Earnings, Appropriated		61.0
Common Stock, Shares Authorized		50,000,000	50,000,000
COMMON EQUITY [Abstract]
Stockholders' Equity Attributable to Noncontrolling Interest		114	108
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		4,043	3,773	3,541	3,259
Contributions from parent		128	107	146
Dividends		(209)	(190)	(199)
Total Comprehensive Income (Loss)		351	315	335
Preferred Stock, Shares Authorized		20,000,000	20,000,000
Preferred Stock, Shares Outstanding		1,000	1,000
SCE&G (including Fuel Company)
COMMON EQUITY [Abstract]
Contributions from parent		126	107	146
Dividends		(202)	(184)	(192)
Total Comprehensive Income (Loss)		340	305	321
Accumulated Other Comprehensive Income (Loss), Net of Tax		(4)	(3)	(2)	(33)
Genco
COMMON EQUITY [Abstract]
Stockholders' Equity Attributable to Noncontrolling Interest		114	108	104	97
Contributions from parent		2
Dividends		$ (7)	$ (6)	$ (7)