RATE AND OTHER REGULATORY MATTERS ELECTRIC-BLRA (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Entity Information [Line Items]
Undercollected balance fuel	$ 46
Public Utilities, Allowed Return on Common Equity under Base Load Review Act	11.00%
Public Utilities Increase (Decrease) in Retail Electric Rates Approved under BLRA	2.80%	2.90%	2.30%
Public Utilties increase (decrease) in retail electric rates	66.2	67.2	52.1
Carrying cost recovery	5.8	2.9
SCE&G
Entity Information [Line Items]
Undercollected balance fuel	46
Public Utilities, Allowed Return on Common Equity under Base Load Review Act	11.00%
Public Utilities Increase (Decrease) in Retail Electric Rates Approved under BLRA	2.80%	2.90%	2.30%
Public Utilties increase (decrease) in retail electric rates	66.2	67.2	52.1
Carrying cost recovery	$ 5.8	$ 2.9