LONG-TERM AND SHORT-TERM DEBT (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument, Redemption [Line Items]
Short-term Debt, Weighted Average Interest Rate	0.74%	0.52%
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,400,000,000	$ 1,400,000,000
Commercial Paper	420,000,000	709,000,000
Letters of Credit Outstanding, Amount	$ 300,000	300,000
Other Long-Term Debt Lenders	2
Long-term Debt Current Maturities in Next Twelve Months	$ 116,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Two	15,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	724,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	13,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Five	363,000,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 980,000,000	$ 691,000,000
Industrial and Pollution Control Bonds [Member]
Debt Instrument, Redemption [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.03%	0.04%
Wells Fargo, National Association, Bank of America & Morgan Stanley [Member]
Debt Instrument, Redemption [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	9.50%
JP Morgan Chase, Mizuho, TD Bank, Credit Suisse AG,Cayman Islands Branch, MUFG Union Bank and UBS Loan [Member]
Debt Instrument, Redemption [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	7.90%
BB&T Bank [Domain]
Debt Instrument, Redemption [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	5.50%
SCE&G | Branch Banking Trust Company, Union Bank and US Bank National Assoc [Member]
Debt Instrument, Redemption [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	5.50%
PSNC Energy [Member]
Debt Instrument, Redemption [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 200,000,000	$ 100,000,000
Parent Company [Member]
Debt Instrument, Redemption [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 400,000,000	$ 300,000,000
Expires December 2020 [Domain]
Debt Instrument, Redemption [Line Items]
Duration of Long Term Credit Agreement	5
Long-Term Line of Credit - SCE&G (including SC Fuel Co)	$ 1,200,000,000
Long-Term Line of Credit - SC Fuel Co only	$ 500,000,000
Expires December 2016 [Domain]
Debt Instrument, Redemption [Line Items]
Duration of Long Term Credit Agreement	3	3
Long-term Line of Credit - SCE&G only	$ 200,000,000
Parent Company [Member]
Debt Instrument, Redemption [Line Items]
Short-term Debt, Weighted Average Interest Rate	1.19%	0.54%
Commercial Paper	$ 37,000,000	$ 179,000,000
Letters of Credit Outstanding, Amount	3,000,000	3,000,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 360,000,000	$ 118,000,000
PSNC Energy [Member]
Debt Instrument, Redemption [Line Items]
Short-term Debt, Weighted Average Interest Rate	0.77%	0.65%
Commercial Paper	$ 74,000,000	$ 30,000,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 126,000,000	$ 70,000,000