LONG-TERM AND SHORT-TERM DEBT (Details 2) (USD $)																																					3 Months Ended		3 Months Ended
	Oct. 01, 2012	Sep. 30, 2012	Sep. 30, 2012 Fuel Company	Oct. 01, 2012 Wells Fargo Bank, National Association (Member)	Sep. 30, 2012 Wells Fargo Bank, National Association (Member)	Sep. 30, 2012 Bank of America, N.A. (Member)	Sep. 30, 2012 Morgan Stanly Bank, N.A. (Member)	Sep. 30, 2012 Branch Banking and Trust Company (Member)	Sep. 30, 2012 Credit Suisse AG, Cayman Islands Branch (Member)	Sep. 30, 2012 JPMorgan Chase Bank, N.A. (Member)	Sep. 30, 2012 Mizuho Corporate Bank, Ltd (Member)	Sep. 30, 2012 TD Bank, N.A. (Member)	Sep. 30, 2012 UBS Loan Finance LLC (Member)	Sep. 30, 2012 Deutsche Bank AG, New York Branch (Member)	Sep. 30, 2012 Union Bank, N.A. (Member)	Sep. 30, 2012 US Bank National Association (Member)	Oct. 01, 2012 SCE&G	Sep. 30, 2012 SCE&G	Dec. 31, 2011 SCE&G	Sep. 30, 2012 Parent Company [Member]	Dec. 31, 2011 Parent Company [Member]	Sep. 30, 2012 Retail Gas Marketing and Energy Marketing	Dec. 31, 2011 Retail Gas Marketing and Energy Marketing	Oct. 01, 2012 SCE&G (including Fuel Company)	Sep. 30, 2012 SCE&G (including Fuel Company)	Dec. 31, 2011 SCE&G (including Fuel Company)	Sep. 30, 2012 SCE&G (including Fuel Company) Wells Fargo Bank, National Association (Member)	Oct. 01, 2012 SCE and G [Member]	Sep. 30, 2012 SCE and G [Member]	Oct. 01, 2012 SCE and G [Member] Deutsche Bank AG, New York Branch (Member)	Sep. 30, 2012 SCE and G [Member] Deutsche Bank AG, New York Branch (Member)	Sep. 30, 2012 SCE and G [Member] Three other banks (Member)	Oct. 01, 2012 Fuel Company	Sep. 30, 2012 Fuel Company	Sep. 30, 2012 PSNC Energy	Dec. 31, 2011 PSNC Energy	Sep. 30, 2012 First Mortgage Bonds [Member]	Sep. 30, 2012 First Mortgage Bonds [Member] SCE&G	Sep. 30, 2012 Medium Term Notes First [Member]	Sep. 30, 2012 Medium Term Notes First [Member] SCE and G [Member]	Sep. 30, 2012 Medium-term Notes [Member]
Debt Instrument [Line Items]
Due to Affiliate, Current																		$ 109,000,000	$ 136,000,000			$ 10,100,000	$ 13,200,000
Debt Instruments [Abstract]
Debt Instrument, Increase, Additional Borrowings																																					250,000,000		250,000,000	250,000,000
Debt Instrument, Interest Rate, Stated Percentage																																						4.35%	4.125%		6.25%
Face value of Industrial Revenue Bonds issued, proceeds of which were availed as loan																													67,800,000
Lines of credit:
Line of Credit Facility, Maximum Borrowing Capacity	1,800,000,000	1,500,000,000	500,000,000																	300,000,000	300,000,000			200,000,000	1,100,000,000	1,100,000,000		1,400,000,000					500,000,000	400,000,000	100,000,000	100,000,000
Commercial Paper																				66,000,000	131,000,000				327,000,000	512,000,000									0	10,000,000
Commercial paper, weighted average interest rate (as a percent)																				0.80%	0.63%				0.47%	0.56%									0.00%	0.57%
Letters of credit supported by LOC																				3,000,000	3,000,000				0	0									0	0
Line of Credit Facility, Remaining Borrowing Capacity																				231,000,000	166,000,000				773,000,000	588,000,000									100,000,000	90,000,000
LOC advances																				$ 0	$ 0				$ 0	$ 0									$ 0	$ 0
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank				10.70%	10.00%	10.00%	10.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	5.30%	5.30%	5.30%											10.00%			6.30%	5.30%	6.00%
Number of other banks (in entities)		3															2