CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Common Stock, Shares, Outstanding	142.9	142.9
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 128	$ 124
Public Utilities, Property, Plant and Equipment, Net	13,365	13,145
Allowance for Doubtful Accounts Receivable, Current	5	5
Write-down, Goodwill	230	230
Assets, Current	1,217	1,378
Regulated Entity, Other Assets, Noncurrent	$ 2,314	$ 2,157
SCEG
Common Stock, Shares, Outstanding	40.3	40.3
Public Utilities, Property, Plant and Equipment, Net	$ 11,748	$ 11,589
Allowance for Doubtful Accounts Receivable, Current	3	3
Assets, Current	872	1,019
Regulated Entity, Other Assets, Noncurrent	2,124	1,973
SCEG | Variable Interest Entity, Primary Beneficiary [Member]
Public Utilities, Property, Plant and Equipment, Net	683	700
Assets, Current	90	88
Regulated Entity, Other Assets, Noncurrent	$ 58	$ 53