RATE AND OTHER REGULATORY MATTERS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended		12 Months Ended							3 Months Ended										3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 SCEG	Mar. 31, 2013 SCEG	May 01, 2015 SCEG	Dec. 31, 2013 SCEG	Dec. 31, 2012 SCEG	Dec. 31, 2013 PSNC Energy	Mar. 31, 2014 PSNC Energy	Mar. 31, 2014 Pension Costs [Member]	Dec. 31, 2013 Pension Costs [Member]	Mar. 31, 2014 Pension Costs [Member] SCEG	Dec. 31, 2013 Pension Costs [Member] SCEG	Dec. 31, 2012 Pension Costs [Member] SCEG	Mar. 31, 2014 Deferred Pollution Control Costs	Dec. 31, 2013 Deferred Pollution Control Costs	Dec. 31, 2013 Deferred Pollution Control Costs SCEG	Mar. 31, 2014 Franchise agreement Costs	Dec. 31, 2013 Franchise agreement Costs	Mar. 31, 2014 Franchise agreement Costs SCEG	Dec. 31, 2013 Franchise agreement Costs SCEG	Mar. 31, 2014 Storm damage reserve [Member]
Rate Matters [Line Items]
Fuel Costs				$ 10.3
Undercollected balance fuel							46
Carrying costs on deferred income tax assets				(1.2)
Storm reserve applied to offset storm damage costs																							13.6
Carrying cost recovery	2	0		2	0
Regulatory Assets, Noncurrent	1,467.0		1,360.0	1,409.0			1,303.0			2.8	235.0	238.0	212.0	215.0		37.0	37.0	37.0	30.0	31.0	30.0	31.0
Number of coal fired units to be retired					6			6
Public Utilities, Percent Increase (Decrease) in Retail Electric Rates							2.90%	2.30%
Allowable return on common equity (as a percent)				11.00%
Demand Side Management Program Costs, Noncurrent				15.4	16.9			19.6
Regulatory Asset Recovery Assessments						12
Increase (decrease) in retail electric rate requested under the BLRA							67.2	52.1
Public Utilities, Percent Increase (Decrease) in Retail Natural Gas Rates								2.10%
Public Utilities changes in Retail Natural Gas Rates Requested and Approved under RSA								7.5
Basis for rate calculation				12-month rolling average					12
Regulatory Noncurrent Asset Amortization Period													12	14	30
Public Utilities Base Fuel under Collected Balance Recovery Period	12			12
Defined Benefit Plan, Deferred Debit Attributable to Share of Regulatory Authority													14		63
Derivative, Gain on Derivative				17.8
Storm Damage Reserve Cost Applied				5.0
Estimated Offset From Interest Rate Regulatory Liability				5.5
Reduction to Net Lost Revenues from DSM programs				25.00%
Net Lost Revenues associated with DSM programs				6.6
Reduction to DSM Program costs deferred				$ 6.6
Number of Units retired							3
Demand side management recovery period				5
Unrecovered lost revenue period DSM programs				24