DERIVATIVE FINANCIAL INSTRUMENTS (Details 3) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Gain (Loss) on Derivatives
Interest Rate Cash Flow Hedge Ineffectiveness is Immaterial	insignificant	insignificant	insignificant	insignificant
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Unrealized Gain (Loss) On Derivatives Arising During Period, Net of Tax	$ (2,000,000)	$ 0	$ 1,000,000	$ (3,000,000)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(1,000,000)	(1,000,000)	1,000,000	(5,000,000)
Derivative, Credit Risk Related Contingent Features [Abstract]
Collateral Already Posted, Aggregate Fair Value	44,400,000		44,400,000		26,800,000
Additional collateral required to be posted to counterparties if all underlying contingent features were fully triggered	104,500,000		104,500,000		0
Aggregate fair value of all derivative instruments with contingent provisions that are in a net liability position	148,900,000		148,900,000		25,200,000
Cashcollateralrequestedfromcounterparty	1,000,000		1,000,000		34,100,000
Derivative, net asset position	1,000,000		1,000,000		34,100,000
LetterofCreditAvailableCommodityDerivatives,assetposition	4,000,000		4,000,000		6,000,000
Commodity Derivative, net asset position	6,000,000		6,000,000		6,000,000
Interest Rate Contract
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Deferred in Regulatory Accounts Effective Portion, Net	(1,000,000)	61,000,000	(4,000,000)	96,000,000
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	0	0	(1,000,000)	(1,000,000)
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Unrealized Gain (Loss) On Derivatives Arising During Period, Net of Tax	(2,000,000)	3,000,000	4,000,000	(4,000,000)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(2,000,000)	(1,000,000)	(4,000,000)	(3,000,000)
Commodity Contract
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			0
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Unrealized Gain (Loss) On Derivatives Arising During Period, Net of Tax	0	3,000,000	(3,000,000)	1,000,000
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	1,000,000	0	5,000,000	(2,000,000)
SCEG
Gain (Loss) on Derivatives
Interest Rate Cash Flow Hedge Ineffectiveness is Immaterial	insignificant	insignificant	insignificant
Derivative, Credit Risk Related Contingent Features [Abstract]
Collateral Already Posted, Aggregate Fair Value	17,900,000		17,900,000		1,500,000
Additional collateral required to be posted to counterparties if all underlying contingent features were fully triggered	105,300,000		105,300,000		0
Aggregate fair value of all derivative instruments with contingent provisions that are in a net liability position	123,100,000		123,100,000		1,000,000
Cashcollateralrequestedfromcounterparty	0		0		31,700,000
Derivative, net asset position	0		0		31,700,000
SCEG | Interest Rate Contract
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Deferred in Regulatory Accounts Effective Portion, Net	(1,000,000)	61,000,000	(4,000,000)	96,000,000
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	0	0	(1,000,000)	(1,000,000)
Interest Expense [Member] | Interest Rate Contract
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			7,100,000
Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			0
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	55,000,000		55,000,000
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Unrealized Gain (Loss) On Derivatives Arising During Period, Net of Tax	0		185
Not Designated as Hedging Instrument [Member] | SCEG | Interest Rate Contract
Gain (Loss) on Derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			0
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	55,000,000		0
Effect of Cash Flow Hedges on Statement of Income
Other Comprehensive Income (Loss), Unrealized Gain (Loss) On Derivatives Arising During Period, Net of Tax	$ 0		$ 0