INCOME TAXES INCOME TAXES (Details 2) (USD $)	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
income tax [Line Items]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	$ 84,000,000				$ 143,000,000							$ 84,000,000	$ 143,000,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent									6.90%	5.00%	6.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate												243,000,000	211,000,000	194,000,000
Income Tax Expense (Benefit) Continuing Operations, Income Tax Reconciliation, Changes [Abstract]
Income Tax Reconciliation, State and Local Income Taxes												22,000,000	19,000,000	15,000,000
Income Tax Reconciliation, Amortization of State and Local Investment Tax Credits												(5,000,000)	(13,000,000)	(16,000,000)
Income Tax Reconciliation, Allowance for Cost of Equity Funds Used During Construction												(9,000,000)	(8,000,000)	(5,000,000)
Income Tax Reconciliation, Deductions, Dividends												(10,000,000)	(9,000,000)	(9,000,000)
Amortization of Amounts Deferred under Federal Investment Tax Credits												(3,000,000)	(3,000,000)	(3,000,000)
Section 45 tax credit												(5,000,000)	(5,000,000)	(2,000,000)
Effective Income Tax Reconciliation, Deductions, Qualified Production Activities												(11,000,000)	(9,000,000)	(6,000,000)
Income Tax Reconciliation, Other Adjustments												1,000,000	(1,000,000)	0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate												35.00%
Income Available to Common Shareholders	104,000,000	131,000,000	85,000,000	151,000,000	105,000,000	122,000,000	72,000,000	121,000,000				471,000,000	420,000,000	387,000,000
Income Tax Expense (Benefit)												223,000,000	182,000,000	168,000,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest												694,000,000	602,000,000	555,000,000
Income (Loss) from Continuing Operations before Income Taxes, Domestic												694,000,000	602,000,000	555,000,000
SCE&G
income tax [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	3,000,000				2,000,000						5,000,000	3,000,000	2,000,000
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	17,000,000				73,000,000							17,000,000	73,000,000
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate												203,000,000	178,000,000	159,000,000
Income Tax Expense (Benefit) Continuing Operations, Income Tax Reconciliation, Changes [Abstract]
Income Tax Reconciliation, State and Local Income Taxes												18,000,000	17,000,000	12,000,000
Income Tax Reconciliation, Amortization of State and Local Investment Tax Credits												(5,000,000)	(13,000,000)	(16,000,000)
Income Tax Reconciliation, Allowance for Cost of Equity Funds Used During Construction												(9,000,000)	(7,000,000)	(5,000,000)
Amortization of Amounts Deferred under Federal Investment Tax Credits												(3,000,000)	(3,000,000)	(3,000,000)
Section 45 tax credit												(5,000,000)	(5,000,000)	(2,000,000)
Effective Income Tax Reconciliation, Deductions, Qualified Production Activities												(11,000,000)	(9,000,000)	(6,000,000)
Income Tax Reconciliation, Other Adjustments												1,000,000	(1,000,000)	1,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate												35.00%
Income Tax Expense (Benefit)												189,000,000	157,000,000	140,000,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest												$ 580,000,000	$ 509,000,000	$ 456,000,000