CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Public Utilities, Property, Plant and Equipment, Net	$ 11,160	$ 10,896
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	142	139
Allowance for Doubtful Accounts Receivable, Current	7	7
Assets, Current	1,404	1,527
Regulated Entity, Other Assets, Noncurrent	1,701	1,706
SCEG
Public Utilities, Property, Plant and Equipment, Net	9,627	9,375
Allowance for Doubtful Accounts Receivable, Current	3	3
Assets, Current	934	1,009
Regulated Entity, Other Assets, Noncurrent	1,562	1,566
SCEG | Variable Interest Entity, Primary Beneficiary [Member]
Public Utilities, Property, Plant and Equipment, Net	626	640
Assets, Current	184	206
Regulated Entity, Other Assets, Noncurrent	$ 58	$ 54