LONG-TERM AND SHORT-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified								6 Months Ended							3 Months Ended		3 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 SCE&G (including Fuel Company)	May 01, 2013 SCE&G (including Fuel Company)	Dec. 31, 2012 SCE&G (including Fuel Company)	Oct. 15, 2012 SCE&G (including Fuel Company)	Sep. 30, 2012 SCE&G (including Fuel Company)	Jun. 30, 2013 SCEG	Dec. 31, 2012 SCEG	Sep. 30, 2012 SCEG	Mar. 31, 2013 Fuel Company	Sep. 30, 2012 Fuel Company	Jun. 30, 2013 Bonds [Member]	Jan. 31, 2013 Bonds [Member]	Mar. 31, 2013 Industrial Revenue Bonds issued by JEDA proceeds of which were loaned to subsidiary	Jan. 31, 2013 Industrial Revenue Bonds issued by JEDA proceeds of which were loaned to subsidiary	Mar. 31, 2013 Industrial and Pollution Control Bonds [Member]	Jan. 31, 2013 Industrial and Pollution Control Bonds [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of First Mortgage Bond								$ 400
Debt Instrument, Increase, Additional Borrowings															39.5		14.7
Debt Instrument, Interest Rate, Stated Percentage													4.60%	7.125%	3.63%	4.00%		5.20%
Debt Instrument, Decrease, Repayments																	56.9
Line of Credit Facility, Maximum Borrowing Capacity	1,800		1,400	200	1,400	1,400	1,200			1,200	500	500
Commercial Paper			238		449
Debt, Weighted Average Interest Rate			0.30%		0.42%
Letters of Credit Outstanding, Amount			0.3		0.3
Line of Credit Facility, Remaining Borrowing Capacity			1,162		951
Long-term Debt, Current Maturities	23	172						16	165
Long- Term Debt Noncurrent including Derivative Liabilities	5,432	4,949						4,043	3,557
Debt Instrument, Face Amount								$ 67.8