CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Public Utilities, Property, Plant and Equipment, Net	$ 11,582	$ 10,896
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	148	139
Allowance for Doubtful Accounts Receivable, Current	5	7
Assets, Current	1,351	1,527
Regulated Entity, Other Assets, Noncurrent	1,560	1,706
SCEG
Public Utilities, Property, Plant and Equipment, Net	10,015	9,375
Allowance for Doubtful Accounts Receivable, Current	3	3
Assets, Current	1,015	1,009
Regulated Entity, Other Assets, Noncurrent	1,496	1,566
SCEG | Variable Interest Entity, Primary Beneficiary [Member]
Public Utilities, Property, Plant and Equipment, Net	708	640
Assets, Current	162	206
Regulated Entity, Other Assets, Noncurrent	$ 43	$ 54