DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	$ (5)		$ (5)		$ (17)
Asset Derivatives Fair Value	117		117		88
Derivative Asset Fair Value Gross Amount offset in statement of financial position	0		0		(1)
Liability Derivatives Fair Value	42		42		123
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	(1)		(1)		(1)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(5)		(5)		(17)
Cash Collateral Posted for Offsetting Disclosure	31		31
Derivative Liability, Fair Value, Net	41		41		122
Net Fair Value Derivative Asset offset against Collateral	112		112		70
Net Fair Value Derivative Liability offset against Collateral	5		5		27
Derivative Asset, Fair Value, Net	117		117		87
Prepayments and other current assets [member]
Derivative [Line Items]
Derivative Liability, Fair Value, Net	1		1
Derivative Asset, Fair Value, Net	78		78		50
Other current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value, Net	14		14		80
Other deferred credits and other liabilities
Derivative [Line Items]
Derivative Liability, Fair Value, Net	26		26		42
Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Net	39		39		37
Derivatives designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value	106		106		74
Liability Derivatives Fair Value	31		31		110
Derivatives not designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value	11		11		14
Liability Derivatives Fair Value	10		10		13
Energy Management Contracts [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	10		10		13
Derivative Asset Fair Value Gross Amount offset in statement of financial position	0		0		(1)
Liability Derivatives Fair Value	11		11		13
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	(1)		(1)		(1)
Cash Collateral Posted for Offsetting Disclosure	(9)		(9)		(11)
Derivative Liability, Fair Value, Net	10		10		12
Net Fair Value Derivative Asset offset against Collateral	10		10		12
Net Fair Value Derivative Liability offset against Collateral	1		1		1
Derivative Asset, Fair Value, Net	10		10		12
Interest Rate Contract
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	0		(1)	(1)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(5)		(5)		(17)
Asset Derivatives Fair Value	106		106		73
Liability Derivatives Fair Value	27		27		106
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(5)		(5)		(17)
Cash Collateral Posted for Offsetting Disclosure	(22)		(22)		(67)
Derivative Liability, Fair Value, Net	27		27		106
Net Fair Value Derivative Asset offset against Collateral	101		101		56
Net Fair Value Derivative Liability offset against Collateral	0		0		22
Derivative Asset, Fair Value, Net	106		106		73
Interest Rate Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	72		72		42
Interest Rate Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	6		6		70
Interest Rate Contract | Derivatives designated as hedging instruments | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	21		21		36
Interest Rate Contract | Derivatives designated as hedging instruments | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	34		34		31
Commodity Contract
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0		0
Asset Derivatives Fair Value	1		1		2
Liability Derivatives Fair Value	4		4		4
Derivative Liability, Fair Value, Net	4		4		4
Net Fair Value Derivative Asset offset against Collateral	1		1		2
Net Fair Value Derivative Liability offset against Collateral	4		4		4
Derivative Asset, Fair Value, Net	1		1		2
Commodity Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value					1
Liability Derivatives Fair Value	1		1
Commodity Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	3		3		4
Commodity Contract | Derivatives not designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	1		1		1
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		5		7
Liability Derivatives Fair Value					1
Other Energy Management Contract [Member] | Derivatives not designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	5		5		6
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		5
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		5		6
Liability Derivatives Fair Value					6
SCEG
Derivative [Line Items]
Derivative Liability, Fair Value, Net	5		5		75
Derivative Asset, Fair Value, Net	106		106		73
SCEG | Prepayments and other current assets [member]
Derivative [Line Items]
Derivative Asset, Fair Value, Net	72		72		42
SCEG | Other current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value, Net	2		2		66
SCEG | Other deferred credits and other liabilities
Derivative [Line Items]
Derivative Liability, Fair Value, Net	3		3		9
SCEG | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Net	34		34		31
SCEG | Derivatives designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value	106		106		73
Liability Derivatives Fair Value	5		5		75
SCEG | Interest Rate Contract
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Deferred Accounts into Income Effective Portion, Net	0	0	(1)	(1)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(5)		(5)		(17)
Asset Derivatives Fair Value	106		106		73
Liability Derivatives Fair Value	5		5		75
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(5)		(5)		(17)
Cash Collateral Posted for Offsetting Disclosure	0		0		35
Derivative Liability, Fair Value, Net	5		5		75
Net Fair Value Derivative Asset offset against Collateral	101		101		56
Net Fair Value Derivative Liability offset against Collateral	0		0		23
Derivative Asset, Fair Value, Net	106		106		73
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	72		72		42
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	2		2		66
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	3		3		9
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	$ 34		$ 34		$ 31