RATE AND OTHER REGULATORY MATTERS (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended			24 Months Ended
	Nov. 30, 2010	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 SCE&G	Jun. 30, 2011 SCE&G	Jun. 30, 2012 SCE&G	Dec. 31, 2011 SCE&G	Jul. 31, 2011 SCE&G	Dec. 31, 2010 SCE&G	Jul. 31, 2012 SCE&G	May 01, 2012 SCE&G
Rate Matters [Line Items]
Public Utilities, Property, Plant and Equipment, Amount of Loss (Recovery) on Plant Abandonment			$ 447,000,000
Public Utilities, Property, Plant and Equipment, Description of Plant Abandonment							22506309
Amount Recovered Through Electric Rates to Offset Deferred Pollution, Control Costs					9,200,000		9,200,000
Public Utilities, Percent Increase (Decrease) in Retail Electric Rates							6.61%	3.75%	4.88%
Allowable return on common equity (as a percent)						11.00%					10.70%
Length of credit period (in years)											two
Demand Side Management Program Costs, Noncurrent												19,600,000
Public Utilities Stipulations Related to Rate Matters Credit Offset by Amortization of Weather Related Revenues Benenefits Exhausted									48,700,000
Public Utilities, Property, Plant and Equipment Identifiable Capital Costs	283,000,000
Public Utilities Additional Labor Expenses for Oversight of New Units			132,000,000
Public Utilities Percent Increase (Decrease) in Retail Electric Rates Requested and Approved Under BLRA							2.50%	2.40%		2.30%
Increase (decrease) in retail electric rate requested under the BLRA							56,700,000	52.8		47.3
Public Utilities, Percent Increase (Decrease) in Retail Natural Gas Rates								2.10%		(2.10%)
Public Utilities, Increase (Decrease) in Retail Natural Gas Rates Requested and Approved under RSA							$ 151,500,000	$ 8.6		$ 10.4
Basis for rate calculation				12	12-month rolling average
Public Utilities, Increase (Decrease) in Cost of Gas Component of Retail Natural Gas Rates		0
Regulatory Noncurrent Asset, Amortization Period		30