RATE AND OTHER REGULATORY MATTERS (Details 2) (USD $) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended	24 Months Ended
	Feb. 29, 2012	Nov. 30, 2010	Mar. 31, 2012	Jul. 31, 2012	Dec. 31, 2011
Regulatory Assets:
Public Utilities, Property, Plant and Equipment Identifiable Capital Costs	$ 6	$ 0
Share in Approved Capital Costs	12
Public Utilities Additional Labor Expenses for Oversight of New Units	137
Regulatory assets			1,237.0		1,279.0
Regulatory assets, expected recovery period (in years)			30
Amount Recovered Through Electric Rates to Offset Turbine Expenses				18.4
Accrual period of nuclear refueling charges (in months)			18
Deferred Income Tax Charges [Member]
Regulatory Assets:
Regulatory assets			243.0		243.0
Regulatory assets, expected recovery period (in years)			70
Under-collections-electric fuel adjustment clause
Regulatory Assets:
Regulatory assets			6.0		28.0
Environmental remediation costs
Regulatory Assets:
Regulatory assets			30.0		30.0
Regulatory assets, expected recovery period (in years)			23
Asset Retirement Obligation Costs [Member]
Regulatory Assets:
Regulatory assets			319.0		316.0
Regulatory assets, expected recovery period (in years)			95
Franchise agreements
Regulatory Assets:
Regulatory assets			39.0		40.0
Regulatory assets, expected recovery period (in years)			20
Deferred employee benefit plan costs
Regulatory Assets:
Regulatory assets			390.0		392.0
Regulatory assets, expected recovery period (in years)			12
Planned major maintenance
Regulatory Assets:
Regulatory assets			0		6.0
Deferred losses on interest rate derivatives
Regulatory Assets:
Regulatory assets			134.0		154.0
Regulatory assets, expected recovery period (in years)			30
Deferred pollution control costs
Regulatory Assets:
Regulatory assets			29.0		25.0
Other.
Regulatory Assets:
Regulatory assets			47.0		45.0
Regulatory assets, expected recovery period (in years)			30
SCE&G
Regulatory Assets:
Regulatory assets			$ 1,164.0		$ 1,206.0