COMMON EQUITY (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Schedule of Capitalization, Equity [Line Items] | ||
| Common Stock, Shares Authorized | 200,000,000 | |
| SCE&G | ||
| Schedule of Capitalization, Equity [Line Items] | ||
| Retained Earnings, Appropriated | $ 115.0 | $ 93.9 |
| Common Stock, Shares Authorized | 50,000,000 | |
| Preferred Stock, Shares Authorized | 20,000,000 | |
| Preferred Stock, Shares Outstanding | 1,000 | |
| Genco [Member] | ||
| Schedule of Capitalization, Equity [Line Items] | ||
| General Partners' Contributed Capital | $ 23.0 | |
| Fuel Company [Member] | ||
| Schedule of Capitalization, Equity [Line Items] | ||
| General Partners' Contributed Capital | 1.0 | |
| SCANA [Member] | ||
| Schedule of Capitalization, Equity [Line Items] | ||
| General Partners' Contributed Capital | $ 675.0 | |
| PSNC Energy [Member] | ||
| Schedule of Capitalization, Equity [Line Items] | ||
| Dividend Payment Restrictions Schedule, Description | $30 million plus 85% | |
| Dividends, Common Stock, Cash | $ 100.0 |