DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	$ (3,000,000)		$ (3,000,000)		$ (17,000,000)
Asset Derivatives Fair Value	135,000,000		135,000,000		88,000,000
Derivative Asset	135,000,000		135,000,000		87,000,000
Derivative Asset, Fair Value, Gross Liability					(1,000,000)
Liability Derivatives Fair Value	37,000,000		37,000,000		123,000,000
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	0		0		(1,000,000)
Derivative Liability	37,000,000		37,000,000		122,000,000
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(3,000,000)		(3,000,000)		(17,000,000)
Derivative Liability, Fair Value of Collateral	30,000,000		30,000,000		78,000,000
Net Fair Value Derivative Asset offset against Collateral	132,000,000		132,000,000		70,000,000
Net Fair Value Derivative Liability offset against Collateral	4,000,000		4,000,000		27,000,000
Prepayments and other current assets [member]
Derivative [Line Items]
Derivative Asset	89,000,000		89,000,000		50,000,000
Derivative Liability	1,000,000		1,000,000
Other current liabilities
Derivative [Line Items]
Derivative Liability	12,000,000		12,000,000		80,000,000
Other deferred credits and other liabilities
Derivative [Line Items]
Derivative Liability	24,000,000		24,000,000		42,000,000
Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Derivative Asset	46,000,000		46,000,000		37,000,000
Derivatives designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value	124,000,000		124,000,000		74,000,000
Liability Derivatives Fair Value	27,000,000		27,000,000		110,000,000
Derivatives not designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value	11,000,000		11,000,000		14,000,000
Liability Derivatives Fair Value	10,000,000		10,000,000		13,000,000
Energy Management Contracts [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	10,000,000		10,000,000		13,000,000
Derivative Asset	10,000,000		10,000,000		12,000,000
Derivative Asset, Fair Value, Gross Liability					(1,000,000)
Liability Derivatives Fair Value	10,000,000		10,000,000		13,000,000
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	0		0		(1,000,000)
Derivative Liability	10,000,000		10,000,000		12,000,000
Derivative Liability, Fair Value of Collateral	(8,000,000)		(8,000,000)		(11,000,000)
Net Fair Value Derivative Asset offset against Collateral	10,000,000		10,000,000		12,000,000
Net Fair Value Derivative Liability offset against Collateral	2,000,000		2,000,000		1,000,000
Interest Rate Contract
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	(1,000,000)	(1,000,000)	(2,000,000)	(2,000,000)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(3,000,000)		(3,000,000)		(17,000,000)
Asset Derivatives Fair Value	124,000,000		124,000,000		73,000,000
Derivative Asset	124,000,000		124,000,000		73,000,000
Liability Derivatives Fair Value	24,000,000		24,000,000		106,000,000
Derivative Liability	24,000,000		24,000,000		106,000,000
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(3,000,000)		(3,000,000)		(17,000,000)
Derivative Liability, Fair Value of Collateral	(21,000,000)		(21,000,000)		(67,000,000)
Net Fair Value Derivative Asset offset against Collateral	121,000,000		121,000,000		56,000,000
Net Fair Value Derivative Liability offset against Collateral	0		0		22,000,000
Interest Rate Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	83,000,000		83,000,000		42,000,000
Interest Rate Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	5,000,000		5,000,000		70,000,000
Interest Rate Contract | Derivatives designated as hedging instruments | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	19,000,000		19,000,000		36,000,000
Interest Rate Contract | Derivatives designated as hedging instruments | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	41,000,000		41,000,000		31,000,000
Commodity Contract
Derivative [Line Items]
Asset Derivatives Fair Value	1,000,000		1,000,000		2,000,000
Derivative Asset	1,000,000		1,000,000		2,000,000
Liability Derivatives Fair Value	3,000,000		3,000,000		4,000,000
Derivative Liability	3,000,000		3,000,000		4,000,000
Derivative Liability, Fair Value of Collateral	(1,000,000)		(1,000,000)
Net Fair Value Derivative Asset offset against Collateral	1,000,000		1,000,000		2,000,000
Net Fair Value Derivative Liability offset against Collateral	2,000,000		2,000,000		4,000,000
Commodity Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value					1,000,000
Commodity Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	3,000,000		3,000,000		4,000,000
Commodity Contract | Derivatives not designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	1,000,000		1,000,000		1,000,000
Other Energy Management Contract [Member] | Derivatives not designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	5,000,000		5,000,000		7,000,000
Liability Derivatives Fair Value	1,000,000		1,000,000		1,000,000
Other Energy Management Contract [Member] | Derivatives not designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	4,000,000		4,000,000		6,000,000
Other Energy Management Contract [Member] | Derivatives not designated as hedging instruments | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	5,000,000		5,000,000
Other Energy Management Contract [Member] | Derivatives not designated as hedging instruments | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	5,000,000		5,000,000		6,000,000
Liability Derivatives Fair Value					6,000,000
SCEG
Derivative [Line Items]
Derivative Asset	124,000,000		124,000,000		73,000,000
Derivative Liability	3,000,000		3,000,000		75,000,000
SCEG | Prepayments and other current assets [member]
Derivative [Line Items]
Derivative Asset	83,000,000		83,000,000		42,000,000
SCEG | Other current liabilities
Derivative [Line Items]
Derivative Liability	2,000,000		2,000,000		66,000,000
SCEG | Other deferred credits and other liabilities
Derivative [Line Items]
Derivative Liability	1,000,000		1,000,000		9,000,000
SCEG | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Derivative Asset	41,000,000		41,000,000		31,000,000
SCEG | Derivatives designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value	124,000,000		124,000,000		73,000,000
Liability Derivatives Fair Value	3,000,000		3,000,000		75,000,000
SCEG | Interest Rate Contract
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	(1,000,000)	(1,000,000)	(2,000,000)	(2,000,000)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(3,000,000)		(3,000,000)		(17,000,000)
Asset Derivatives Fair Value	124,000,000		124,000,000		73,000,000
Derivative Asset	124,000,000		124,000,000		73,000,000
Liability Derivatives Fair Value	3,000,000		3,000,000		75,000,000
Derivative Liability	3,000,000		3,000,000		75,000,000
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(3,000,000)		(3,000,000)		(17,000,000)
Derivative Liability, Fair Value of Collateral	0		0		35,000,000
Net Fair Value Derivative Asset offset against Collateral	121,000,000		121,000,000		56,000,000
Net Fair Value Derivative Liability offset against Collateral	0		0		23,000,000
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	83,000,000		83,000,000		42,000,000
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	2,000,000		2,000,000		66,000,000
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	1,000,000		1,000,000		9,000,000
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	$ 41,000,000		$ 41,000,000		$ 31,000,000