RATE AND OTHER REGULATORY MATTERS (Details 2) (USD $) In Millions, unless otherwise specified			3 Months Ended	12 Months Ended			3 Months Ended		3 Months Ended						3 Months Ended				3 Months Ended										3 Months Ended					3 Months Ended												3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 SCEG	Dec. 31, 2013 SCEG	Dec. 31, 2012 SCEG	Mar. 31, 2013 SCEG	Mar. 31, 2014 Deferred Income Tax Charges [Member]	Dec. 31, 2013 Deferred Income Tax Charges [Member]	Mar. 31, 2014 Deferred Income Tax Charges [Member] SCEG	Dec. 31, 2013 Deferred Income Tax Charges [Member] SCEG	Mar. 31, 2014 Regulatory Clause Revenues, under-recovered [Member]	Dec. 31, 2013 Regulatory Clause Revenues, under-recovered [Member]	Mar. 31, 2014 Regulatory Clause Revenues, under-recovered [Member] SCEG	Dec. 31, 2013 Regulatory Clause Revenues, under-recovered [Member] SCEG	Mar. 31, 2014 Environmental Restoration Costs [Member]	Dec. 31, 2013 Environmental Restoration Costs [Member]	Mar. 31, 2014 Environmental Restoration Costs [Member] SCEG	Dec. 31, 2013 Environmental Restoration Costs [Member] SCEG	Mar. 31, 2014 Asset Retirement Obligation Costs [Member]	Dec. 31, 2013 Asset Retirement Obligation Costs [Member]	Mar. 31, 2014 Asset Retirement Obligation Costs [Member] SCEG	Dec. 31, 2013 Asset Retirement Obligation Costs [Member] 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 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 Losses On Interest Rate Derivatives [Member]	Dec. 31, 2013 Deferred Losses On Interest Rate Derivatives [Member]	Mar. 31, 2014 Deferred Losses On Interest Rate Derivatives [Member] SCEG	Dec. 31, 2013 Deferred Losses On Interest Rate Derivatives [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 unrecovered plant [Member]	Dec. 31, 2013 unrecovered plant [Member]	Mar. 31, 2014 unrecovered plant [Member] SCEG	Dec. 31, 2013 unrecovered plant [Member] SCEG	Mar. 31, 2014 Demand Side Management programs [Member]	Dec. 31, 2013 Demand Side Management programs [Member]	Mar. 31, 2014 Demand Side Management programs [Member] SCEG	Mar. 31, 2014 Other Regulatory Assets [Member]	Dec. 31, 2013 Other Regulatory Assets [Member]	Mar. 31, 2014 Other Regulatory Assets [Member] SCEG	Dec. 31, 2013 Other Regulatory Assets [Member] SCEG	Mar. 31, 2014 Other Regulatory Liability [Member]
Regulatory Assets
Regulatory Liability, Noncurrent	$ 882	$ 966	$ 644	$ 732	$ 732																																													$ 1
Derivative, Gain on Derivative			17.8
Storm Damage Reserve Cost Applied			5.0
Public Utilities, Percent Increase (Decrease) in Retail Electric Rates				2.90%	2.30%
Demand Side Management Program Costs, Noncurrent			15.4		19.6	16.9
MPG enviromental remediatio															26
Regulatory Noncurrent Asset, Amortization Period							70		70										90										12	14	30	30		30												30
Defined Benefit Plan, Deferred Debit Attributable to Share of Regulatory Authority																													14		63
Regulatory Assets, Noncurrent	1,467.0	1,360.0	1,409.0	1,303.0			258.0	259.0	254.0	256.0	36.0	18.0	36.0	18.0	41.0	41.0	37.0	37.0	373.0	368.0	354.0	350.0	30.0	31.0	30.0	31.0	235.0	238.0	212.0	215.0		210.0	124.0	210.0	124.0	37.0	37.0	37.0	143.0	145.0	143.0	145.0	56.0	51.0	56.0	48.0	48.0	40.0	39.0
Demand side management recovery period			5
Unrecovered lost revenue period DSM programs			24
Estimated Offset From Interest Rate Regulatory Liability			$ 5.5