LONG-TERM AND SHORT-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,500
Long-term Debt, Current Maturities	176	31
Long- Term Debt Noncurrent including Derivative Liabilities	4,707	4,622
SCE&G
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	169	19
Long- Term Debt Noncurrent including Derivative Liabilities	$ 3,314	$ 3,222
First Mortgage Bonds [Member] | SCE&G
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.35%