CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Available to Common Shareholders	$ 538	$ 471	$ 420
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(14)	7	(8)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(11)	(18)	(11)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax	(5)	7	(4)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	1	1	1
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(4.0)	8.0	(3.0)
Other Comprehensive Income (Loss), Net of Tax	(15)	26	8
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	1.0	1.0	1.0
Total Comprehensive Income (Loss)	523	497	428
SCE&G
Other Comprehensive Income (Loss), Net of Tax	0	1	(1)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	458	391	352
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	1.0	(1.0)
Amortization of deferred employee benefit plan costs reclassified to net income, net of tax	0	0	0
Total Comprehensive Income (Loss)	458	392	351
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	458	392	351
Genco
Less comprehensive income attributable to noncontrolling interest	12	11	11
SCEG excluding VIEs [Member]
Income Available to Common Shareholders	446	380	341
Total Comprehensive Income (Loss)	446	381	340
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	7	8	6
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (4)	$ 3	$ 13