LONG-TERM AND SHORT-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended					9 Months Ended				6 Months Ended									3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Mar. 31, 2013	Sep. 30, 2014 Credit Suisse AG, Cayman Islands Branch (Member)	Sep. 30, 2014 Branch Banking Trust Company [Member]	Sep. 30, 2014 SCE&G (including Fuel Company)	Dec. 31, 2013 SCE&G (including Fuel Company)	Sep. 30, 2014 SCE&G (including Fuel Company) Credit Suisse AG, Cayman Islands Branch (Member)	Sep. 30, 2014 SCE&G (including Fuel Company) Branch Banking Trust Company [Member]	Jun. 30, 2014 SCEG	Sep. 30, 2014 SCEG	Dec. 31, 2013 SCEG	Sep. 30, 2014 SCEG Credit Suisse AG, Cayman Islands Branch (Member)	Sep. 30, 2014 SCEG Branch Banking Trust Company [Member]	Sep. 30, 2014 PSNC Energy [Member]	Dec. 31, 2013 PSNC Energy [Member]	Sep. 30, 2014 Fuel Company	Mar. 31, 2013 Bonds [Member]	Mar. 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										$ 300
Debt Instrument, Increase, Additional Borrowings																			39.5	14.7
Debt Instrument, Interest Rate, Stated Percentage			3.63%															5.20%			4.00%
Debt Instrument, Decrease, Repayments																				56.9
Line of Credit Facility, Maximum Borrowing Capacity	1,800					1,400	1,400				1,200				100	100	500
Commercial Paper Maximum Term	Outstanding commercial paper (270 or fewer days)					Outstanding commercial paper (270 or fewer days)
Commercial Paper						(361)	(251)								0	0
Debt, Weighted Average Interest Rate						0.28%	0.27%								0.00%	0.00%
Letters of Credit Outstanding, Amount						0.3	(0.3)								0	0
Line of Credit Facility, Remaining Borrowing Capacity						1,039	1,149								100	100
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				8.90%	8.90%			8.90%	6.30%				8.90%	8.90%
Number of other banks (in entities)	2										2
Long-term Debt, Current Maturities	52	54									46	48
Debt Instrument, Face Amount											$ 67.8
Debt Instrument, Interest Rate Terms										.045