RATE AND OTHER REGULATORY MATTERS (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Regulatory Liabilities [Line Items]
Regulatory assets	$ 1,464.0	$ 1,360.0	$ 1,464.0
Regulatory Noncurrent Liability, Amortization Period		30
Accrual period of nuclear refueling charges (in months)			18
Regulatory Liability, Noncurrent	882	966	882
Accumulated deferred income taxes
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	21	24	21
Asset Retirement Obligation Costs [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	692	695	692
Storm damage reserve
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	27	27	27
Monetization of bankruptcy claim
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	32	29	32
Deferred gains on interest rate derivatives
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	110	181	110
Planned major maintenance
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	0	10	0
SCE&G
Regulatory Liabilities [Line Items]
Regulatory assets	1,377.0	1,303.0	1,377.0
Maintenance Costs	18.4		18.4
Regulatory Noncurrent Liability, Amortization Period		30
Accrual period of nuclear refueling charges (in months)			18
Amount Allowed to be Recovered through Electric Rates to Offset Incremental Storm Damage Costs		100
Regulatory Liability, Noncurrent	665	732	665
Annual Storm Damage Costs not offset by Amounts Recovered through Electric Rates		2.5
SCE&G | Accumulated deferred income taxes
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	21	19	21
SCE&G | Asset Retirement Obligation Costs [Member]
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	507	495	507
SCE&G | Storm damage reserve
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	27	27	27
SCE&G | Deferred gains on interest rate derivatives
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	110	181	110
SCE&G | Planned major maintenance
Regulatory Liabilities [Line Items]
Regulatory Liability, Noncurrent	0	10	0
Demand Side Management programs [Member]
Regulatory Liabilities [Line Items]
Regulatory assets	27.0	51.0	27.0
Demand Side Management programs [Member] | SCE&G
Regulatory Liabilities [Line Items]
Regulatory assets	$ 27.0	$ 51.0	$ 27.0