CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Common Stock, Shares, Outstanding	142.9	142.7
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 122	$ 122
Public Utilities, Property, Plant and Equipment, Net	12,729	12,232
Allowance for Doubtful Accounts Receivable, Current	5	7
Write-down, Goodwill	230	230
Assets, Current	1,221	2,145
Regulated Entity, Other Assets, Noncurrent	$ 2,089	$ 2,003
SCEG
Common Stock, Shares, Outstanding	40.3	40.3
Public Utilities, Property, Plant and Equipment, Net	$ 11,216	$ 10,783
Allowance for Doubtful Accounts Receivable, Current	4	4
Assets, Current	932	1,246
Regulated Entity, Other Assets, Noncurrent	1,982	1,896
SCEG | Variable Interest Entity, Primary Beneficiary [Member]
Public Utilities, Property, Plant and Equipment, Net	694	675
Assets, Current	100	158
Regulated Entity, Other Assets, Noncurrent	$ 52	$ 50