INCOME TAXES INCOME TAXES (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2015	Dec. 31, 2011
Deferred Tax Assets, Net [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	$ 127	$ 84
Deferred tax Nuclear Decommissioning	216	220
Deferred Tax Assets, Financial Instruments	40	32
Deferred Tax Asset, Unamortized Investment, Tax Credits	17	19
Deferred Tax Assets, Derivative Instruments	0	27
Deferred Tax Assets, Monetization of Bankruptcy Claims	10	11
Deferred Tax Liabilities, Tax Deferred Expense Compensation and Benefits, Employee Benefits	107	63
Deferred Tax Assets, Other	10	13
Deferred Tax Assets, Net	420	406
Deferred Tax Liabilities, Gross [Abstract]
Deferred Tax Liabilities, Property, Plant and Equipment	1,928	1,765
Deferred Tax Liabilities, Asset Retirement Obligation	122	121
Deferred Tax Liabilities, Deferred Expense Fuel Costs	27	25
Deferred tax asset unrecovered plant	53	55
Deferred Tax Liabilities, Derivatives	21	0
Deferred Tax Liability, Demand Side Management	21	21
deferred tax liability, prepayments	27	25
Deferred Tax Liabilities, Other	45	38
Deferred Tax Liabilities, Gross	2,351	2,113
Deferred Tax Liabilities, Net, Noncurrent	1,931	1,707
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross increases current period tax positions	13
Balance at the end of the period	16	3	0
SCE&G
Investments, Owned, Federal Income Tax Note [Line Items]
Significant (Increase) Decrease in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound				2
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	16		2
Deferred Tax Assets, Net [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	47	17
Deferred tax Nuclear Decommissioning	205	209
Deferred Tax Asset, Unamortized Investment, Tax Credits	17	19
Deferred Tax Assets, Derivative Instruments	0	27
Deferred Tax Liabilities, Tax Deferred Expense Compensation and Benefits, Employee Benefits	91	54
Deferred Tax Assets, Other	6	11
Deferred Tax Assets, Net	275	283
Deferred Tax Liabilities, Gross [Abstract]
Deferred Tax Liabilities, Property, Plant and Equipment	1,623	1,494
Deferred Tax Liabilities, Asset Retirement Obligation	115	114
Deferred Tax Liabilities, Deferred Expense Fuel Costs	27	26
Deferred tax asset unrecovered plant	53	55
Deferred Tax Liabilities, Derivatives	21	0
Deferred Tax Liability, Demand Side Management	21	21
deferred tax liability, prepayments	25	23
Deferred Tax Liabilities, Other	23	18
Deferred Tax Liabilities, Gross	1,999	1,805
Deferred Tax Liabilities, Net, Noncurrent	1,724	1,522
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions			0
Gross decreases tax positions in prior period		0	38
Gross increases current period tax positions	13	3	0
Balance at the end of the period	$ 16	$ 3	$ 0		$ 38