RATE AND OTHER REGULATORY MATTERS NARRATIVE (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Public Utilities Base Fuel under Collected Balance Recovery Period	12
Demand side management recovery period	10
Planned major maintenance [Member]
Maintenance Costs	$ 18.4
Amounts Recovered Through Electric Rates to offset Nuclear Related Outage Costs	17.2
Storm damage reserve [Member]
Amount Allowed to be Recovered through Electric Rates to Offset Incremental Storm Damage Costs	100
Annual Storm Damage Costs not offset by Amounts Recovered through Electric Rates	2.5
Storm reserve applied to offset storm damage costs	16.8
Storm Damage Reserve Applied To Offset Net Lost Margin Related To DSM	5.0
Deferred Income Tax Charge [Member]
Regulatory Noncurrent Asset, Amortization Period	70
Environmental Restoration Costs [Member]
Regulatory Noncurrent Asset, Amortization Period	25
Asset Retirement Obligation Costs [Member]
Regulatory Noncurrent Asset, Amortization Period	90
Pension Costs [Member]
Regulatory Noncurrent Asset, Amortization Period	12	14	30
Defined Benefit Plan, Deferred Debit Attributable to Share of Regulatory Authority		14	63
Deferred Losses On Interest Rate Derivatives [Member]
Regulatory Noncurrent Asset, Amortization Period	P50Y
Other Regulatory Assets [Member]
Regulatory Noncurrent Asset, Amortization Period	P30Y
SCE&G
Regulatory Noncurrent Asset, Amortization Period	12
Demand side management recovery period	10
SCE&G | Planned major maintenance [Member]
Maintenance Costs	18.4
Amounts Recovered Through Electric Rates to offset Nuclear Related Outage Costs	17.2
SCE&G | Storm damage reserve [Member]
Amount Allowed to be Recovered through Electric Rates to Offset Incremental Storm Damage Costs	100
Annual Storm Damage Costs not offset by Amounts Recovered through Electric Rates	2.5
Storm reserve applied to offset storm damage costs	16.8
Storm Damage Reserve Applied To Offset Net Lost Margin Related To DSM	5.0
SCE&G | Deferred Income Tax Charge [Member]
Regulatory Noncurrent Asset, Amortization Period	70
SCE&G | Environmental Restoration Costs [Member]
Regulatory Noncurrent Asset, Amortization Period	25
SCE&G | Asset Retirement Obligation Costs [Member]
Regulatory Noncurrent Asset, Amortization Period	90
SCE&G | Pension Costs [Member]
Regulatory Noncurrent Asset, Amortization Period	12	14
Defined Benefit Plan, Deferred Debit Attributable to Share of Regulatory Authority		$ 14	$ 63
SCE&G | Other Regulatory Assets [Member]
Regulatory Noncurrent Asset, Amortization Period	50