COMMON EQUITY (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Capitalization, Equity [Line Items]
Retained Earnings, Appropriated	$ 67.7	$ 63.1
Common Stock, Shares Authorized	200,000,000	200,000,000
Proceeds from exercise of equity forward sales agreements		196.2
Common stock issued through various compensation and dividend reinvestment plans, including the Stock Purchase Savings Plan	99.3	100.9	97.7
Number of shares underlying forward sales contracts (in shares)		6,600,000
SCE&G
Schedule of Capitalization, Equity [Line Items]
Retained Earnings, Appropriated	$ 67.7	$ 63.1
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