COMMON EQUITY (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Schedule of Capitalization, Equity [Line Items]
Common Stock, Shares Authorized	200,000,000	200,000,000
Common stock issued through various compensation and dividend reinvestment plans, including the Stock Purchase Savings Plan	$ 0.0	$ 14.3
SCE&G
Schedule of Capitalization, Equity [Line Items]
Retained Earnings, Appropriated	$ 79.0	$ 72.4
Common Stock, Shares Authorized	50,000,000	50,000,000
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Preferred Stock, Shares Outstanding	1,000	1,000