RATE AND OTHER REGULATORY MATTERS (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Regulatory Liabilities:
Regulatory liabilities	$ 778	$ 913
Accumulated deferred income taxes
Regulatory Liabilities:
Regulatory liabilities	23	26
Asset removal costs
Regulatory Liabilities:
Regulatory liabilities	662	780
Storm damage reserve
Regulatory Liabilities:
Regulatory liabilities	32	38
Amount allowed to be recovered through electric rates to offset incremental storm damage costs	100
Annual amount of storm damage costs which can not be offset by amounts recovered through electric rates	2.5
Monetization of bankruptcy claim
Regulatory Liabilities:
Regulatory liabilities	34	37
Deferred gains on interest rate derivatives
Regulatory Liabilities:
Regulatory liabilities	24	26
Other
Regulatory Liabilities:
Regulatory liabilities	3	6
SCE&G | Storm damage reserve
Regulatory Liabilities:
Cost applied to storm damage cost reserve	$ 6.4	$ 9.5