FAIR VALUE MEASUREMENTS, INCLUDING DERIVATIVES (Details 2) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 6,034.2	$ 5,697.2
Long-term Debt, Fair Value	6,525.2	6,592.1
SCEG
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	4,800.6	4,308.6
Long-term Debt, Fair Value	$ 5,191.5	$ 5,070.9