AFFILIATED TRANSACTIONS - SCEG AFFILIATED TRANSACTIONS -SCEG (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Canadys Refined Coal LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction Purchases from Related Party	$ 109.5	$ 31.8
Related Party Transaction, Amounts of Transaction	108.9	31.6
Due to Affiliate, Current	25.2		18.0
Due from Affiliate, Current	25.0		18.0
Equity Method Investment, Ownership Percentage	40.00%
CGT [Member]
Related Party Transaction [Line Items]
Related Party Transaction Purchases from Related Party	14.7	16.9
Due to Affiliate, Current	3.1		3.3
Due from Affiliate, Current	2.7		1.3
Energy Marketing [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current	16.8		12.5
Cost of Natural Gas Purchases	107.3	89.3
SCANA Services [Member]
Related Party Transaction [Line Items]
Related Party Transaction Purchases from Related Party	43.8		49.1
Related Party Transaction, Expenses from Transactions with Related Party	$ 146.4	$ 145.7