CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Common Stock, Shares, Outstanding	142.9	142.9
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 132	$ 124
Public Utilities, Property, Plant and Equipment, Net	13,598	13,145
Allowance for Doubtful Accounts Receivable, Current	5	5
Write-down, Goodwill	230	230
Assets, Current	1,142	1,378
Regulated Entity, Other Assets, Noncurrent	$ 2,458	$ 2,157
SCEG
Common Stock, Shares, Outstanding	40.3	40.3
Public Utilities, Property, Plant and Equipment, Net	$ 11,933	$ 11,589
Allowance for Doubtful Accounts Receivable, Current	3	3
Assets, Current	839	1,019
Regulated Entity, Other Assets, Noncurrent	2,299	1,973
SCEG | Variable Interest Entity, Primary Beneficiary [Member]
Public Utilities, Property, Plant and Equipment, Net	667	700
Assets, Current	84	88
Regulated Entity, Other Assets, Noncurrent	$ 63	$ 53