CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Available to Common Shareholders	$ 420	$ 387	$ 376
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	(8)	(58)	(36)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax	0	0	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(5)	(36)	(22)
Shares, Outstanding	132	130	127
Common Stock, Value, Outstanding	1,983	1,886	1,789
Accumulated Other Comprehensive Income (Loss), Net of Tax	(86)	(94)	(47)
Stockholders' Equity Attributable to Parent	4,154	3,889	3,702
Stock Issued During Period, Shares, New Issues	2	3	4
Common stock issued	97	97	149
Dividends, Common Stock	(260)	(250)	(239)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(4.0)	(3.0)	26.0
Other Comprehensive Income (Loss)
Losses on cash flow hedging activities reclassified to net income	(19)	(13)	(17)
Amortization of deferred employee benefit plan costs reclassified to net income, net of tax	1.0	1.0	1.0
Other Comprehensive Income	8	(47)	8
Total Comprehensive Income (Loss)	428	340	384
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax	12	8	10
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax	(2)	(2)	16
SCE&G
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax	0	0	1
Stockholders' Equity Attributable to Parent	3,929	3,665
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	352	316	304
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(1.0)	(1.0)	29.0
Other Comprehensive Income (Loss)
Amortization of deferred employee benefit plan costs reclassified to net income, net of tax	0	0	2.0
Other Comprehensive Income	(1)	(1)	31
Total Comprehensive Income (Loss)	351	315	335
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	351	315	335
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax	0	0	18
Genco
Other Comprehensive Income (Loss)
Less comprehensive income attributable to noncontrolling interest	11	10	14
SCE&G (including Fuel Company)
Income Available to Common Shareholders	341	306	290
Shares, Outstanding	40	40	40
Common Stock, Value, Outstanding	2,167	2,041	1,934
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4)	(3)	(2)
Other Comprehensive Income (Loss)
Total Comprehensive Income (Loss)	$ 340	$ 305	$ 321