CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Public Utilities, Property, Plant and Equipment, Net | $ 11,010 | $ 10,648 |
| Regulated Entity, Other Assets, Noncurrent | 4,616 | 5,766 |
| Nonutility property, accumulated depreciation | 143 | 133 |
| Receivables, net of allowance for uncollectible accounts | 7 | 6 |
| Assets, Current | $ 1,549 | $ 1,851 |
| Common Stock, Shares, Outstanding | 143.0 | 143.0 |
| SCE&G | ||
| Public Utilities, Property, Plant and Equipment, Net | $ 8,783 | $ 8,620 |
| Regulated Entity, Other Assets, Noncurrent | 4,439 | 5,640 |
| Receivables, net of allowance for uncollectible accounts | 4 | 4 |
| Assets, Current | $ 1,478 | $ 1,477 |
| Common Stock, Shares, Outstanding | 40.3 | 40.3 |
| VIEs | SCE&G | ||
| Public Utilities, Property, Plant and Equipment, Net | $ 711 | $ 711 |
| Regulated Entity, Other Assets, Noncurrent | 34 | 50 |
| Assets, Current | $ 90 | $ 191 |