RATE AND OTHER REGULATORY MATTERS NARRATIVE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2013
Deferred Income Tax Charge [Member]
Regulatory Asset, Amortization Period	85 years
Asset Retirement Obligation Costs [Member]
Regulatory Asset, Amortization Period	110 years
Pension Costs [Member]
Defined Benefit Plan, Deferred Debit Attributable to Share of Regulatory Authority	$ 14	$ 63
SCE&G | Deferred Income Tax Charge [Member]
Regulatory Asset, Amortization Period	85 years
SCE&G | Asset Retirement Obligation Costs [Member]
Regulatory Asset, Amortization Period	110 years
SCE&G | Pension Costs [Member]
Regulatory Asset, Amortization Period	12 years	14 years
Defined Benefit Plan, Deferred Debit Attributable to Share of Regulatory Authority	$ 14	$ 63