RATE AND OTHER REGULATORY MATTERS NARRATIVE (Details)	12 Months Ended
	Dec. 31, 2016
Deferred Income Tax Charge [Member]
Regulatory Asset, Amortization Period	85 years
Asset Retirement Obligation Costs [Member]
Regulatory Asset, Amortization Period	110 years
SCE&G | Demand Side Management programs [Member]
Regulatory Asset, Amortization Period	5 years
SCE&G | Pension Costs [Member]
Regulatory Asset, Amortization Period	11 years
SCE&G | carrying cost on nuclear [Member]
Regulatory Asset, Amortization Period	10 years
PSNC Energy [Member] | Pipeline integrity management costs [Member]
Regulatory Asset, Amortization Period	5 years