CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Common Stock, Shares, Outstanding	142.2	140.7
Public Utilities, Property, Plant and Equipment, Net	$ 12,203	$ 11,643
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	156	150
Allowance for Doubtful Accounts Receivable, Current	6	6
Assets, Current	1,359	1,421
Regulated Entity, Other Assets, Noncurrent	1,798	1,596
PSNC Energy [Member]
Write-down, Goodwill	230	230
SCEG
Common Stock, Shares, Outstanding	40.3	40.3
Public Utilities, Property, Plant and Equipment, Net	10,528	10,048
Allowance for Doubtful Accounts Receivable, Current	4	3
Assets, Current	939	929
Regulated Entity, Other Assets, Noncurrent	1,751	1,550
SCEG | Variable Interest Entity, Primary Beneficiary [Member]
Public Utilities, Property, Plant and Equipment, Net	687	720
Assets, Current	124	147
Regulated Entity, Other Assets, Noncurrent	$ 43	$ 35