LONG-TERM AND SHORT-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified														3 Months Ended		3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	May 01, 2013 SCE&G (including Fuel Company)	Mar. 31, 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)	Mar. 31, 2013 SCEG	Dec. 31, 2012 SCEG	Sep. 30, 2012 SCEG	Mar. 31, 2013 Fuel Company	Sep. 30, 2012 Fuel Company	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]
Debt Instrument, Increase, Additional Borrowings														$ 39.5		$ 14.7
Debt Instrument, Interest Rate, Stated Percentage													3.63%		4.00%		5.20%
Debt Instrument, Decrease, Repayments																56.9
Line of Credit Facility, Maximum Borrowing Capacity		1,800	200	1,400	1,400	1,400	1,200			1,200	500	500
Commercial Paper				408	449
Debt, Weighted Average Interest Rate				0.33%	0.42%
Letters of Credit Outstanding, Amount				0	0
Line of Credit Facility, Remaining Borrowing Capacity				992	951
Long-term Debt, Current Maturities	173	172						165	165
Long- Term Debt Noncurrent including Derivative Liabilities	5,039	4,949						3,646	3,557
Debt Instrument, Face Amount								$ 67.8