COMMON EQUITY (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Schedule of Capitalization, Equity [Line Items]
Common Stock, Shares Authorized	200,000,000		200,000,000
COMMON EQUITY [Abstract]
Forward Contract Indexed to Issuer's Equity, Indexed Shares		6,600,000
Dividends declared	$ (74,000,000)	$ (70,000,000)
Other comprehensive income (loss), unrealized holding gain (loss) net of reclassification to AOCI arising during period, net of tax	(1,000,000)	7,000,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	192,000,000	158,000,000
Stock Issued During Period, Value, New Issues	27,000,000	221,000,000
Common Stock, Shares, Outstanding	141,300,000		140,700,000
Proceeds from exercise of equity forward sales agreements		196,200,000
Common Stock, Value, Outstanding	2,307,000,000	2,204,000,000	2,280,000,000	1,983,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(61,000,000)	(79,000,000)	(60,000,000)	(86,000,000)
Retained Earnings, Unappropriated	2,563,000,000	2,338,000,000	2,444,000,000	2,257,000,000
Other Comprehensive Income (Loss), Net of Tax	(1,000,000)	7,000,000
Income Available to Common Shareholders	193,000,000	151,000,000
Common equity	4,809,000,000	4,463,000,000	4,664,000,000	4,154,000,000
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(53,000,000)	(63,000,000)	(52,000,000)	(70,000,000)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(8,000,000)	(16,000,000)	(8,000,000)	(16,000,000)
SCEG
Schedule of Capitalization, Equity [Line Items]
Common Stock, Shares Authorized	50,000,000		50,000,000
COMMON EQUITY [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	126,000,000	92,000,000
Proceeds from Contributions from Parent	20,000,000	221,000,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	0
Net Income (Loss) Attributable to Noncontrolling Interest	3,000,000	3,000,000
Dividends	(64,000,000)	(64,000,000)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	126,000,000	92,000,000
Common Stock, Shares, Outstanding	40,300,000		40,300,000
Preferred Stock, Shares Authorized	20,000,000		20,000,000
Preferred Stock, Shares Outstanding	1,000		1,000
Common Stock, Value, Outstanding	2,499,000,000		2,479,000,000
Preferred Stock, Value, Issued	100,000		100,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,000,000)		(3,000,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	4,571,000,000	4,292,000,000	4,489,000,000	4,043,000,000
Retained Earnings, Unappropriated	1,957,000,000		1,896,000,000
Common equity	4,453,000,000		4,372,000,000
SCEG excluding VIEs [Member]
COMMON EQUITY [Abstract]
Proceeds from Contributions from Parent	20,000,000	221,000,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	0
Dividends	(62,000,000)	(62,000,000)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	123,000,000	89,000,000
Common Stock, Value, Outstanding	2,499,000,000	2,388,000,000	2,479,000,000	2,167,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,000,000)	(4,000,000)	(3,000,000)	(4,000,000)
Retained Earnings, Unappropriated	1,957,000,000	1,793,000,000	1,896,000,000	1,766,000,000
Income Available to Common Shareholders	123,000,000	89,000,000
Noncontrolling Interest [Member]
COMMON EQUITY [Abstract]
Net Income (Loss) Attributable to Noncontrolling Interest	3,000,000	3,000,000
Dividends	(2,000,000)	(2,000,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 118,000,000	$ 115,000,000	$ 117,000,000	$ 114,000,000