COMMON EQUITY (Tables) (USD $)
In Millions, unless otherwise specified

6 Months Ended

Jun. 30, 2012

Jun. 30, 2011

Dec. 31, 2011

Dec. 31, 2010

Schedule of Capitalization, Equity [Line Items]

Schedule of Stockholders Equity [Table Text Block]

Changes in common equity during the six months ended June 30, 2012 and 2011 were as follows:

Millions of dollars	2012			2011
Balance at January 1,	$	3,889		$	3,702
Common stock issued	50			50
Dividends declared	(130		)	(124		)
Comprehensive income	201			177
Balance as of June 30,	$	4,010		$	3,805

SCE&G

Schedule of Capitalization, Equity [Line Items]

Schedule of Stockholders Equity [Table Text Block]

Changes in common equity during the six months ended June 30, 2012 and 2011 were as follows:

Millions of dollars	Common Equity			Noncontrolling Interest			Total Equity
Balance at January 1, 2012	$	3,665		$	108		$	3,773
Capital contribution from parent	51			—			51
Dividends declared	(103		)	(4		)	(107		)
Comprehensive income	143			6			149
Balance as of June 30, 2012	$	3,756		$	110		$	3,866
Balance at January 1, 2011	$	3,437		$	104		$	3,541
Capital contribution from parent	49			—			49
Dividends declared	(97		)	(3		)	(100		)
Comprehensive income	127			5			132
Balance as of June 30, 2011	$	3,516		$	106		$	3,622

Dividends

$ (107)

$ (100)

Contributions from parent

51

49

Stockholders' Equity Attributable to Noncontrolling Interest

110

108

Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest

$ 3,866

$ 3,622

$ 3,773

$ 3,541