The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to deferred domestic federal statutory income tax expense or benefit.

No definition available.

INCOME TAXES (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
INCOME TAXES (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investments, Owned, Federal Income Tax Note [Line Items]
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	6.00%	6.90%	5.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				35.00%
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)				$ 38,000,000us-gaap_CurrentFederalTaxExpenseBenefit	$ 161,000,000us-gaap_CurrentFederalTaxExpenseBenefit	$ 103,000,000us-gaap_CurrentFederalTaxExpenseBenefit
Current State and Local Tax Expense (Benefit)				(4,000,000)	17,000,000	10,000,000
Current Income Tax Expense (Benefit)				34,000,000us-gaap_CurrentIncomeTaxExpenseBenefit	178,000,000us-gaap_CurrentIncomeTaxExpenseBenefit	113,000,000us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)				184,000,000	39,000,000	72,000,000
Deferred State and Local Income Tax Expense (Benefit)				34,000,000	10,000,000	14,000,000
Deferred Income Tax Expense (Benefit)				218,000,000us-gaap_DeferredIncomeTaxExpenseBenefit	49,000,000us-gaap_DeferredIncomeTaxExpenseBenefit	86,000,000us-gaap_DeferredIncomeTaxExpenseBenefit
Income Tax Reconciliation, Tax Credits, Investment [Abstract]
Balance at the beginning of the period				(1,000,000)	(1,000,000)	(14,000,000)
Investment Tax Credit				(4,000,000)us-gaap_InvestmentTaxCredit	(4,000,000)us-gaap_InvestmentTaxCredit	(17,000,000)us-gaap_InvestmentTaxCredit
Income Tax Expense (Benefit)				248,000,000us-gaap_IncomeTaxExpenseBenefit	223,000,000us-gaap_IncomeTaxExpenseBenefit	182,000,000us-gaap_IncomeTaxExpenseBenefit
Income (Loss) from Continuing Operations before Income Taxes, Domestic				786,000,000	694,000,000	602,000,000
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount				275,000,000	243,000,000	211,000,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount				24,000,000	22,000,000	19,000,000
Income Tax Reconciliation, Amortization of State and Local Investment Tax Credits				(5,000,000)	(5,000,000)	(13,000,000)
Income Tax Reconciliation, Allowance for Cost of Equity Funds Used During Construction				(11,000,000)	(9,000,000)	(8,000,000)
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount				(10,000,000)	(10,000,000)	(9,000,000)
Amortization of Amounts Deferred under Federal Investment Tax Credits				(3,000,000)	(3,000,000)	(3,000,000)
Section41TaxCredit				(3,000,000)scg_Section41TaxCredit	0scg_Section41TaxCredit	0scg_Section41TaxCredit
Section 45 tax credit				(9,000,000)scg_Section45TaxCredit	(5,000,000)scg_Section45TaxCredit	(5,000,000)scg_Section45TaxCredit
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent				(7,000,000)	(11,000,000)	(9,000,000)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount				(3,000,000)	1,000,000	(1,000,000)
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	127,000,000			127,000,000	84,000,000
Deferred tax Nuclear Decommissioning	216,000,000scg_DeferredTaxNuclearDecommissioning			216,000,000scg_DeferredTaxNuclearDecommissioning	220,000,000scg_DeferredTaxNuclearDecommissioning
Deferred Tax Assets, Financial Instruments	40,000,000			40,000,000	32,000,000
Deferred Tax Asset, Unamortized Investment, Tax Credits	17,000,000			17,000,000	19,000,000
Deferred Tax Assets, Derivative Instruments	0			0	27,000,000
Deferred Tax Assets, Monetization of Bankruptcy Claims	10,000,000			10,000,000	11,000,000
Deferred Tax Assets, Other	10,000,000us-gaap_DeferredTaxAssetsOther			10,000,000us-gaap_DeferredTaxAssetsOther	13,000,000us-gaap_DeferredTaxAssetsOther
Deferred Tax Assets, Net	420,000,000us-gaap_DeferredTaxAssetsLiabilitiesNet			420,000,000us-gaap_DeferredTaxAssetsLiabilitiesNet	406,000,000us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred Tax Liabilities, Property, Plant and Equipment	1,928,000,000			1,928,000,000	1,765,000,000
Deferred Tax Liabilities, Tax Deferred Expense Compensation and Benefits, Employee Benefits	107,000,000			107,000,000	63,000,000
Deferred Tax Liabilities, Asset Retirement Obligation	122,000,000			122,000,000	121,000,000
Deferred Tax Liabilities, Deferred Expense Fuel Costs	27,000,000			27,000,000	25,000,000
Deferred tax asset unrecovered plant	53,000,000scg_Deferredtaxassetunrecoveredplant			53,000,000scg_Deferredtaxassetunrecoveredplant	55,000,000scg_Deferredtaxassetunrecoveredplant
Deferred Tax Liabilities, Derivatives	21,000,000			21,000,000	0
Deferred Tax Liability, Demand Side Management	21,000,000			21,000,000	21,000,000
deferred tax liability, prepayments	27,000,000scg_Deferredtaxliabilityprepayments			27,000,000scg_Deferredtaxliabilityprepayments	25,000,000scg_Deferredtaxliabilityprepayments
Deferred Tax Liabilities, Other	45,000,000us-gaap_DeferredTaxLiabilitiesOther			45,000,000us-gaap_DeferredTaxLiabilitiesOther	38,000,000us-gaap_DeferredTaxLiabilitiesOther
Deferred Tax Liabilities, Net	2,351,000,000us-gaap_DeferredTaxLiabilities			2,351,000,000us-gaap_DeferredTaxLiabilities	2,113,000,000us-gaap_DeferredTaxLiabilities
Deferred Tax Liabilities, Net, Noncurrent	1,931,000,000			1,931,000,000	1,707,000,000
Unrecognized Tax Benefits	16,000,000us-gaap_UnrecognizedTaxBenefits			16,000,000us-gaap_UnrecognizedTaxBenefits	3,000,000us-gaap_UnrecognizedTaxBenefits	0us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions				13,000,000
SCE&G
Investments, Owned, Federal Income Tax Note [Line Items]
Significant (Increase) Decrease in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	7,000,000			7,000,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	13,000,000			13,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				35.00%
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)				39,000,000	146,000,000	91,000,000
Current State and Local Tax Expense (Benefit)				(6,000,000)	13,000,000	8,000,000
Current Income Tax Expense (Benefit)				33,000,000	159,000,000	99,000,000
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)				157,000,000	25,000,000	62,000,000
Deferred State and Local Income Tax Expense (Benefit)				32,000,000	9,000,000	12,000,000
Deferred Income Tax Expense (Benefit)				189,000,000	34,000,000	74,000,000
Income Tax Reconciliation, Tax Credits, Investment [Abstract]
Balance at the beginning of the period				(1,000,000)	(1,000,000)	(13,000,000)
Investment Tax Credit				(4,000,000)	(4,000,000)	(16,000,000)
Income Tax Expense (Benefit)				218,000,000	189,000,000	157,000,000
Net Income (Loss) Attributable to Noncontrolling Interest				12,000,000	11,000,000	11,000,000
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount				237,000,000	203,000,000	178,000,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount				21,000,000	18,000,000	17,000,000
Income Tax Reconciliation, Amortization of State and Local Investment Tax Credits				(5,000,000)	(5,000,000)	(13,000,000)
Income Tax Reconciliation, Allowance for Cost of Equity Funds Used During Construction				(10,000,000)	(9,000,000)	(7,000,000)
Amortization of Amounts Deferred under Federal Investment Tax Credits				(3,000,000)	(3,000,000)	(3,000,000)
Section 45 tax credit				(9,000,000)	(5,000,000)	(5,000,000)
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent				(7,000,000)	(11,000,000)	(9,000,000)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount				(3,000,000)	1,000,000	(1,000,000)
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	47,000,000			47,000,000	17,000,000
Deferred tax Nuclear Decommissioning	205,000,000			205,000,000	209,000,000
Deferred Tax Asset, Unamortized Investment, Tax Credits	17,000,000			17,000,000	19,000,000
Deferred Tax Assets, Derivative Instruments	0			0	27,000,000
Deferred Tax Assets, Other	6,000,000			6,000,000	11,000,000
Deferred Tax Assets, Net	275,000,000			275,000,000	283,000,000
Deferred Tax Liabilities, Property, Plant and Equipment	1,623,000,000			1,623,000,000	1,494,000,000
Deferred Tax Liabilities, Tax Deferred Expense Compensation and Benefits, Employee Benefits	91,000,000			91,000,000	54,000,000
Deferred Tax Liabilities, Asset Retirement Obligation	115,000,000			115,000,000	114,000,000
Deferred Tax Liabilities, Deferred Expense Fuel Costs	27,000,000			27,000,000	26,000,000
Deferred tax asset unrecovered plant	53,000,000			53,000,000	55,000,000
Deferred Tax Liabilities, Derivatives	21,000,000			21,000,000	0
Deferred Tax Liability, Demand Side Management	21,000,000			21,000,000	21,000,000
deferred tax liability, prepayments	25,000,000			25,000,000	23,000,000
Deferred Tax Liabilities, Other	23,000,000			23,000,000	18,000,000
Deferred Tax Liabilities, Net	1,999,000,000			1,999,000,000	1,805,000,000
Deferred Tax Liabilities, Net, Noncurrent	1,724,000,000			1,724,000,000	1,522,000,000
Unrecognized Tax Benefits	16,000,000			16,000,000	3,000,000	0	38,000,000
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions					0	(38,000,000)
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions				13,000,000	3,000,000	0
Held for Sale, CGT and SCI [Member]
Income Tax Reconciliation, Tax Credits, Investment [Abstract]
Deferred Tax Liabilities, Net, Current	$ 51,300,000			$ 51,300,000