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INCOME TAXES (Details) (SCE&G, USD $)
In Millions, unless otherwise specified
3 Months Ended
Sep. 30, 2012
Dec. 31, 2011
SCE&G
   
Changes to Unrecognized Tax Benefits    
Balance at the beginning of the period   $ 38
Balance at the end of the period   38
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 2  
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Other Information 38000000  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued   $ 38