DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Asset Derivatives Fair Value	$ 10,000,000	$ 21,000,000
Derivative Asset	8,000,000	44,000,000
Derivative Asset, Fair Value, Gross Liability	(2,000,000)	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	(1,000,000)
Derivative Liability	187,000,000	28,000,000
Liability Derivatives Fair Value	189,000,000	28,000,000
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	(2,000,000)	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	(1,000,000)
Derivative Liability, Fair Value of Collateral	(69,000,000)	(25,000,000)
Net Fair Value Derivative Asset offset against Collateral	8,000,000	43,000,000
Net Fair Value Derivative Liability offset against Collateral	118,000,000	2,000,000
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	1,100,000,000	1,300,000,000
Prepayments and other current assets [member]
Derivative [Line Items]
Derivative Asset	6,000,000	21,000,000
Other current liabilities
Derivative [Line Items]
Derivative Liability	112,000,000	10,000,000
Other deferred credits and other liabilities
Derivative [Line Items]
Derivative Liability	75,000,000	18,000,000
Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Derivative Asset	2,000,000	23,000,000
Derivatives designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value	1,000,000	2,000,000
Liability Derivatives Fair Value	29,000,000	19,000,000
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	9,000,000	42,000,000
Liability Derivatives Fair Value	160,000,000	9,000,000
Energy Management Contracts [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	7,000,000	8,000,000
Derivative Asset	6,000,000	8,000,000
Derivative Asset, Fair Value, Gross Liability	(1,000,000)	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative Liability	6,000,000	8,000,000
Liability Derivatives Fair Value	7,000,000	8,000,000
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	(1,000,000)	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative Liability, Fair Value of Collateral	(5,000,000)	(6,000,000)
Net Fair Value Derivative Asset offset against Collateral	6,000,000	8,000,000
Net Fair Value Derivative Liability offset against Collateral	1,000,000	2,000,000
Interest Rate Contract
Derivative [Line Items]
Asset Derivatives Fair Value	0	32,000,000
Derivative Asset	0	32,000,000
Derivative Asset, Fair Value, Gross Liability	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	(1,000,000)
Derivative Liability	179,000,000	20,000,000
Liability Derivatives Fair Value	179,000,000	20,000,000
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	(1,000,000)
Derivative Liability, Fair Value of Collateral	(63,000,000)	(19,000,000)
Net Fair Value Derivative Asset offset against Collateral	0	31,000,000
Net Fair Value Derivative Liability offset against Collateral	116,000,000	0
Interest Rate Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value
Interest Rate Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	4,000,000	5,000,000
Interest Rate Contract | Derivatives designated as hedging instruments | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	22,000,000	14,000,000
Interest Rate Contract | Derivatives designated as hedging instruments | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value
Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value		13,000,000
Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	102,000,000	1,000,000
Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	51,000,000
Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value		19,000,000
Commodity Contract
Derivative [Line Items]
Asset Derivatives Fair Value	3,000,000	4,000,000
Derivative Asset	2,000,000	4,000,000
Derivative Asset, Fair Value, Gross Liability	(1,000,000)	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Derivative Liability	2,000,000
Liability Derivatives Fair Value	3,000,000
Derivative Liability Fair Value Gross Amount Offset in the Statement of Financial Position	(1,000,000)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0
Derivative Liability, Fair Value of Collateral	(1,000,000)
Net Fair Value Derivative Asset offset against Collateral	2,000,000	4,000,000
Net Fair Value Derivative Liability offset against Collateral	1,000,000
Commodity Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	1,000,000	2,000,000
Commodity Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	3,000,000
Commodity Contract | Not Designated as Hedging Instrument [Member] | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	2,000,000	2,000,000
Other Energy Management Contract [Member] | Not Designated as Hedging Instrument [Member] | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value	5,000,000	4,000,000
Other Energy Management Contract [Member] | Not Designated as Hedging Instrument [Member] | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	4,000,000	4,000,000
Other Energy Management Contract [Member] | Not Designated as Hedging Instrument [Member] | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	3,000,000	4,000,000
Other Energy Management Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value	2,000,000	4,000,000
SCEG
Derivative [Line Items]
Derivative Asset		32,000,000
Derivative Liability	159,000,000
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	1,100,000,000	1,300,000,000
SCEG | Prepayments and other current assets [member]
Derivative [Line Items]
Derivative Asset		13,000,000
SCEG | Other current liabilities
Derivative [Line Items]
Derivative Liability	104,000,000	2,000,000
SCEG | Other deferred credits and other liabilities
Derivative [Line Items]
Derivative Liability	55,000,000
SCEG | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Derivative Asset		19,000,000
SCEG | Derivatives designated as hedging instruments
Derivative [Line Items]
Asset Derivatives Fair Value
Liability Derivatives Fair Value	6,000,000	1,000,000
SCEG | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Asset Derivatives Fair Value		32,000,000
Liability Derivatives Fair Value	153,000,000	1,000,000
SCEG | Interest Rate Contract
Derivative [Line Items]
Asset Derivatives Fair Value	0	32,000,000
Derivative Asset	0	32,000,000
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	(1,000,000)
Derivative Liability	159,000,000	2,000,000
Liability Derivatives Fair Value	159,000,000	2,000,000
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0	(1,000,000)
Derivative Liability, Fair Value of Collateral	(40,000,000)	(1,000,000)
Net Fair Value Derivative Asset offset against Collateral	0	31,000,000
Net Fair Value Derivative Liability offset against Collateral	119,000,000	0
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	2,000,000	1,000,000
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	4,000,000
SCEG | Interest Rate Contract | Derivatives designated as hedging instruments | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value
SCEG | Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Prepayments and other current assets [member]
Derivative [Line Items]
Asset Derivatives Fair Value		13,000,000
SCEG | Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Other current liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	102,000,000	1,000,000
SCEG | Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Other deferred credits and other liabilities
Derivative [Line Items]
Liability Derivatives Fair Value	51,000,000
SCEG | Interest Rate Contract | Not Designated as Hedging Instrument [Member] | Other Deferred Debits and Other Assets [Member]
Derivative [Line Items]
Asset Derivatives Fair Value		$ 19,000,000