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FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Details 2) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other Long-term Debt, Noncurrent $ 5,697.2us-gaap_OtherLongTermDebtNoncurrent $ 5,449.3us-gaap_OtherLongTermDebtNoncurrent
Long-term debt, Fair Value 6,592.1us-gaap_LongTermDebtFairValue 5,916.3us-gaap_LongTermDebtFairValue
SCE&G    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other Long-term Debt, Noncurrent 4,308.6us-gaap_OtherLongTermDebtNoncurrent
/ dei_LegalEntityAxis
= scg_ScegMember		 4,054.9us-gaap_OtherLongTermDebtNoncurrent
/ dei_LegalEntityAxis
= scg_ScegMember
Long-term debt, Fair Value $ 5,070.9us-gaap_LongTermDebtFairValue
/ dei_LegalEntityAxis
= scg_ScegMember		 $ 4,433.0us-gaap_LongTermDebtFairValue
/ dei_LegalEntityAxis
= scg_ScegMember