CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Public Utilities, Property, Plant and Equipment, Net	$ 11,348	$ 10,896
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	145	139
Allowance for Doubtful Accounts Receivable, Current	6	7
Assets, Current	1,419	1,527
Regulated Entity, Other Assets, Noncurrent	1,674	1,706
SCEG
Public Utilities, Property, Plant and Equipment, Net	9,802	9,375
Allowance for Doubtful Accounts Receivable, Current	2	3
Assets, Current	1,027	1,009
Regulated Entity, Other Assets, Noncurrent	1,542	1,566
SCEG | Variable Interest Entity, Primary Beneficiary [Member]
Public Utilities, Property, Plant and Equipment, Net	679	640
Assets, Current	181	206
Regulated Entity, Other Assets, Noncurrent	$ 47	$ 54