CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Public Utilities, Property, Plant and Equipment, Net	$ 10,648	$ 14,324
Regulated Entity, Other Assets, Noncurrent	5,766	2,402
Nonutility property, accumulated depreciation	133	138
Receivables, net of allowance for uncollectible accounts	6	6
Assets, Current	$ 1,851	$ 1,506
Common Stock, Shares, Outstanding	143.0	143.0
SCE&G
Public Utilities, Property, Plant and Equipment, Net	$ 8,620	$ 12,603
Regulated Entity, Other Assets, Noncurrent	5,640	2,273
Receivables, net of allowance for uncollectible accounts	4	3
Assets, Current	$ 1,477	$ 1,020
Common Stock, Shares, Outstanding	40.3	40.3
VIEs | SCE&G
Public Utilities, Property, Plant and Equipment, Net	$ 711	$ 756
Regulated Entity, Other Assets, Noncurrent	50	52
Assets, Current	$ 191	$ 85