DERIVATIVE FINANCIAL INSTRUMENTS (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Gain (Loss) on Derivatives
Interest Rate Cash Flow Hedge Ineffectiveness is Immaterial	insignificant	insignificant
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	$ (11)	$ (19)	$ (13)
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion)	7	(8)	(58)
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness			(1.1)
Derivative, Credit Risk Related Contingent Features [Abstract]
Collateral Already Posted, Aggregate Fair Value	26.8	78.3
Additional collateral required to be posted to counterparties if all underlying contingent features were fully triggered	0	26.2
Aggregate fair value of all derivative instruments with contingent provisions that are in a net liability position	25.2	104.5
Cash collateral requested from counterparty	34.1	32.1
Derivative, net asset position	34.1	32.1
Letter of Credit Available Commodity Derivatives,asset position	6	6
Commodity Derivative, net asset position	10.0	13.0
Commodity contracts
Gain (Loss) on Derivatives
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net			(2)
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(3)	(13)	(9)
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	1.0
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion)	2	(4)	(16)
Interest Rate Contract
Effect of Cash Flow Hedges on Statement of Income
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion)	5	(4)	(42)
Interest Rate Contract | Derivatives not designated as hedging instruments
Effect of Cash Flow Hedges on Statement of Income
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion), classified in income	50
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion)	39
Interest Rate Contract | Derivatives designated as hedging instruments
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Deferred in Regulatory Accounts Effective Portion, Net	106	84	(76)
SCE&G
Gain (Loss) on Derivatives
Interest Rate Cash Flow Hedge Ineffectiveness is Immaterial		insignificant
Effect of Cash Flow Hedges on Statement of Income
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness			(1.1)
Derivative, Credit Risk Related Contingent Features [Abstract]
Collateral Already Posted, Aggregate Fair Value	1.5	35.2
Additional collateral required to be posted to counterparties if all underlying contingent features were fully triggered	0	22.7
Aggregate fair value of all derivative instruments with contingent provisions that are in a net liability position	1.0	57.9
Cash collateral requested from counterparty	31.7	32.1
Commodity Derivative, net asset position	31.7	32.1
SCE&G | Commodity contracts
Gain (Loss) on Derivatives
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		(1)	(2)
SCE&G | Interest Rate Contract | Derivatives not designated as hedging instruments
Effect of Cash Flow Hedges on Statement of Income
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion), classified in income	50
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion)	39
SCE&G | Interest Rate Contract | Derivatives designated as hedging instruments
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Deferred in Regulatory Accounts Effective Portion, Net	106	84	(76)
Interest Expense [Member] | Interest Rate Contract
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(8)	(6)	(4)
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	7.0
Interest Expense [Member] | Interest Rate Contract | Derivatives designated as hedging instruments
Effect of Cash Flow Hedges on Statement of Income
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion), classified in income	(3)	(3)	(3)
Interest Expense [Member] | SCE&G | Interest Rate Contract | Derivatives designated as hedging instruments
Effect of Cash Flow Hedges on Statement of Income
Gain or (Loss) Deferred in Regulatory Accounts (Effective Portion), classified in income	$ (3)	$ (3)	$ (3)