FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Additional Collateral, Aggregate Fair Value	$ 104,500,000		$ 0
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	11,000,000		44,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	153,000,000		28,000,000
Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,000,000		32,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	146,000,000		20,000,000
Commodity Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	3,000,000		4,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability		1,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities	12,000,000		9,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0		0
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,000,000		2,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other energy management contracts
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,000,000		1,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	0		0
Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities	0		0
Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,000,000		32,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	146,000,000		20,000,000
Fair Value, Inputs, Level 2 [Member] | Commodity Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	1,000,000		2,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	1,000,000		0
Fair Value, Inputs, Level 2 [Member] | Other energy management contracts
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	5,000,000		7,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	9,000,000		12,000,000
SCEG
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Additional Collateral, Aggregate Fair Value	105,300,000		0
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,000,000		32,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	125,000,000		2,000,000
SCEG | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,000,000		32,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	125,000,000		2,000,000
SCEG | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	2,000,000		32,000,000
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability	$ 125,000,000		$ 2,000,000