LONG-TERM AND SHORT-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Nuclear fuel purchase contract [Member]	Dec. 31, 2013 Parent Company [Member]	Dec. 31, 2012 Parent Company [Member]	Dec. 31, 2013 PSNC Energy	Dec. 31, 2012 PSNC Energy	Dec. 31, 2013 SCE&G	Dec. 31, 2012 SCE&G	Dec. 31, 2013 SCE&G Nuclear fuel purchase contract [Member]	Dec. 31, 2013 SCE&G Other Debt [Member]	Dec. 31, 2013 Fuel Company	Dec. 31, 2013 Other Debt [Member] SCE&G	Dec. 31, 2012 Other Debt [Member] SCE&G	Dec. 31, 2013 Senior Debentures [Member]	Dec. 31, 2012 Senior Debentures [Member]	Dec. 31, 2013 Industrial and Pollution Control Bonds [Member]	Jan. 31, 2013 Industrial and Pollution Control Bonds [Member]	Dec. 31, 2012 Industrial and Pollution Control Bonds [Member]	Dec. 31, 2013 Industrial and Pollution Control Bonds [Member] SCE&G	Dec. 31, 2012 Industrial and Pollution Control Bonds [Member] SCE&G	Dec. 31, 2013 Junior Notes [Member]	Dec. 31, 2012 Junior Notes [Member]	Dec. 31, 2013 Senior Notes [Member]	Dec. 31, 2012 Senior Notes [Member]	Dec. 31, 2013 Medium-term Notes [Member]	Dec. 31, 2012 Medium-term Notes [Member]	Sep. 30, 2012 Medium-term Notes [Member]	Dec. 31, 2013 First Mortgage Bonds [Member]	Dec. 31, 2012 First Mortgage Bonds [Member]	Dec. 31, 2013 First Mortgage Bonds [Member] SCE&G	Dec. 31, 2012 First Mortgage Bonds [Member] SCE&G	Sep. 30, 2012 First Mortgage Bonds [Member] SCE&G	Feb. 28, 2011 First Mortgage Bonds [Member] SCE&G	Dec. 31, 2013 Genco Notes [Member]	Dec. 31, 2012 Genco Notes [Member]	Dec. 31, 2013 Genco Notes [Member] SCE&G	Dec. 31, 2012 Genco Notes [Member] SCE&G
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate																									6.47%
Long-term Debt, Percentage Bearing Variable Interest, Amount																				$ 67.8
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate																	0.11%		0.17%
Medium-term Notes	800	800
Debt Instrument, Interest Rate, Stated Percentage																		5.20%										6.25%					4.35%	4.35%
Line of Credit Facility, Maximum Borrowing Capacity	1,800			300	300	100	100	1,200				500
LOC advances				0	0	0	0
3 year credit agreement								200
Commercial Paper				125	142	0	32
Debt, Weighted Average Interest Rate			0.78%	0.39%	0.58%	0.00%	0.44%		2.39%	0.78%	2.73%		2.26%	1.62%	5.93%	5.90%	3.83%		4.32%	3.83%	4.32%	7.92%	7.70%	0.94%	1.01%	5.42%	5.02%		5.60%	5.66%	5.60%	5.66%			5.89%	5.87%	5.89%	5.87%
Long-term Debt, Gross	(5,443)	(5,114)						4,047	3,712
Long Term Contract for Nuclear Fuel Purchase	100							100	0
Letters of Credit Outstanding, Amount				3.0	3.0	0	0
Line of Credit Facility, Remaining Borrowing Capacity				172	155	100	68
Derivative Liabilities	28	122						2	75
Long-term Debt, Current Maturities	(54)	(172)						(48)	(165)
Debt Instrument, Unamortized Discount	6	7						8	10
Long- Term Debt Noncurrent including Derivative Liabilities	5,395	4,949						4,007	3,557
Senior Notes	92	96
Secured Debt	3,540	3,290						3,540	3,290
Junior Subordinated Notes	150	150
Secured Debt, Other								233	240																										233	240
Long-term Pollution Control Bond	158	161						158	161
Senior Notes, Noncurrent	350	350
Other Long-term Debt	20	27						16	21
Long-term Debt	$ 5,395	$ 4,949						$ 4,007	$ 3,557
Unfunded property additions								70.00%