CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 69.9		$ 69.9		$ 85.6
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	0	0	2	(4)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax	1	2	4	11
Other Comprehensive (Income) Loss, Pension and Other Postretirment Benefit Plans, Remeasurement and Curtailment Adjustment, Tax	2	0	2	0
SCEG
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 2.7		$ 2.7		$ 4.0