INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 103	$ 52	$ (47)
Current State and Local Tax Expense (Benefit)	10	10	1
Current Income Tax Expense (Benefit)	113	62	(46)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	72	122	223
Deferred State and Local Income Tax Expense (Benefit)	14	12	13
Deferred Income Tax Expense (Benefit)	86	134	236
Income Tax Reconciliation, Tax Credits, Investment [Abstract]
Balance at the beginning of the period	(14)	(25)	(28)
Amortization of Amounts Deferred under Federal Investment Tax Credits	(3)	(3)	(3)
Investment Tax Credit	(17)	(28)	(31)
Income Tax Expense (Benefit)	182	168	159
SCE&G
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	91	52	(56)
Current State and Local Tax Expense (Benefit)	8	12	(5)
Current Income Tax Expense (Benefit)	99	64	(61)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	62	98	207
Deferred State and Local Income Tax Expense (Benefit)	12	6	15
Deferred Income Tax Expense (Benefit)	74	104	222
Income Tax Reconciliation, Tax Credits, Investment [Abstract]
Balance at the beginning of the period	(13)	(25)	(28)
Amortization of Amounts Deferred under Federal Investment Tax Credits	(3)	(3)	(3)
Investment Tax Credit	(16)	(28)	(31)
Income Tax Expense (Benefit)	$ 157	$ 140	$ 130