LONG-TERM AND SHORT-TERM DEBT (DETAILS 4) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,800,000,000
Other Long-Term Debt Lenders	2
Wells Fargo, National Assoc, BOA and Morgan Stanley[Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	10.70%
JP Morgan Chase, Mizuho, TD Bank, Credit Suisse AG,Cayman Islands Branch and UBS Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	8.90%
Branch Banking Trust Co, Union Bank and US Bank National Assoc [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	6.30%
TD Bank [Domain]
Line of Credit Facility [Line Items]
Industrial Revenue Bonds	67,800,000
Expires October 2019 [Domain]
Line of Credit Facility [Line Items]
Long-Term Line of Credit - Parent Co	300,000,000
Long-Term Line of Credit - SCE&G (including SC Fuel Co)	1,200,000,000
Duration of Long-Term Credit Agreement	5
Long-Term Line of Credit - SC Fuel Co only	500,000,000
Long-Term Line of Credit - PSNC	100,000,000
Expires October 2016 [Domain]
Line of Credit Facility [Line Items]
Long-term Line of Credit - SCE&G only	200,000,000
Duration of Long-Term Credit Agreement	3
Parent Company [Member]
Line of Credit Facility [Line Items]
Commercial Paper	179,000,000	125,000,000
Debt, Weighted Average Interest Rate	0.54%	0.39%
Letters of Credit Outstanding, Amount	3,000,000	3,000,000
Line of Credit Facility, Remaining Borrowing Capacity	118,000,000	172,000,000
SCE&G (including Fuel Company)
Line of Credit Facility [Line Items]
Commercial Paper	709,000,000	251,000,000
Debt, Weighted Average Interest Rate	0.52%	0.27%
Letters of Credit Outstanding, Amount	300,000	300,000
Line of Credit Facility, Remaining Borrowing Capacity	691,000,000	1,149,000,000
PSNC Energy
Line of Credit Facility [Line Items]
Commercial Paper	30,000,000
Debt, Weighted Average Interest Rate	0.65%
Line of Credit Facility, Remaining Borrowing Capacity	70,000,000	100,000,000
SCE&G (including Fuel Company)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,400,000,000	1,400,000,000
SCE&G
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,400,000,000	1,400,000,000
Commercial Paper	709,000,000	251,000,000
Debt, Weighted Average Interest Rate	0.52%	0.27%
Letters of Credit Outstanding, Amount	300,000	300,000
Line of Credit Facility, Remaining Borrowing Capacity	691,000,000	1,149,000,000
Other Long-Term Debt Lenders	2
Related Party Transaction, Due from (to) Related Party, Current	80,000,000
Due to Related Parties	83,000,000	27,300,000
SCE&G | Wells Fargo, National Assoc, BOA and Morgan Stanley[Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	10.70%
SCE&G | JP Morgan Chase, Mizuho, TD Bank, Credit Suisse AG,Cayman Islands Branch and UBS Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	8.90%
SCE&G | Branch Banking Trust Co, Union Bank and US Bank National Assoc [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility Percentage of Credit Facilities Provided by Each Bank	6.30%
SCE&G | TD Bank [Domain]
Line of Credit Facility [Line Items]
Industrial Revenue Bonds	67,800,000
SCE&G | Expires October 2019 [Domain]
Line of Credit Facility [Line Items]
Long-Term Line of Credit - SCE&G (including SC Fuel Co)	1,200,000,000
Duration of Long-Term Credit Agreement	5
Long-Term Line of Credit - SC Fuel Co only	500,000,000
SCE&G | Expires October 2016 [Domain]
Line of Credit Facility [Line Items]
Long-term Line of Credit - SCE&G only	200,000,000
Duration of Long-Term Credit Agreement	3
PSNC Energy
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	100,000,000	100,000,000
Parent Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 300,000,000	$ 300,000,000