DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $)	Sep. 30, 2014 MMBTU		Dec. 31, 2013 MMBTU
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	58,084,409	[1]	42,715,958	[2]
Nonmonetary Notional Amount of Basis Swap, Price Risk Derivative Instruments Not Designated as Hedging Instruments	1,199,038		348,453
Interest Rate Derivatives [Abstract]
Derivative, Notional Amount	$ 124,400,000		$ 128,800,000
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	1,100,000,000		1,300,000,000
Additional Collateral, Aggregate Fair Value	117,000,000		0
Derivative, Net Liability Position, Aggregate Fair Value	187,000,000		25,200,000
Cash collateral to request from interest rate derivative counterparty	0		34,100,000
Interest Rate Derivative, net asset position	0		34,100,000
Gas Distribution
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	6,000,000		6,070,000
Retail Gas Marketing
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	10,654,000		6,726,000
Energy Marketing [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	41,430,409	[1]	29,919,958	[2]
Commodity Contract
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	19,847,220		15,356,000
Commodity Contract | Gas Distribution
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	6,000,000		6,070,000
Commodity Contract | Retail Gas Marketing
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	10,654,000		6,726,000
Commodity Contract | Energy Marketing [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	3,193,220		2,560,000
Energy Management Contracts [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	38,237,189		27,359,958
Energy Management Contracts [Member] | Gas Distribution
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0		0
Energy Management Contracts [Member] | Retail Gas Marketing
Derivative [Line Items]
Derivative not designated as hedging, nonmonetary amount	0		0
Energy Management Contracts [Member] | Energy Marketing [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	38,237,189		27,359,958
SCEG
Interest Rate Derivatives [Abstract]
Derivative, Notional Amount	36,400,000		36,400,000
Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	1,100,000,000		1,300,000,000
Additional Collateral, Aggregate Fair Value	118,600,000		0
Derivative, Net Liability Position, Aggregate Fair Value	158,600,000		1,000,000
Cash collateral to request from interest rate derivative counterparty	0		31,700,000
Interest Rate Derivative, net asset position	$ 0		$ 31,700,000

[1] (a) Includes an aggregate 1,199,038 MMBTU related to basis swap contracts in Energy Marketing.

[2] (b) Includes an aggregate 348,453 MMBTU related to basis swap contracts in Energy Marketing.