RATE AND OTHER REGULATORY MATTERS (Tables)
|
12 Months Ended |
Dec. 31, 2018 |
|---|
| Public Utilities, General Disclosures |
|
| Pipeline integrity management revenue requirement [Table Text Block] |
| | | | | | Rates Effective | | 2018 | | 2017 | March 1 | | $14.7 million | | $1.9 million | September 1 | | $1.1 million | | $0.7 million |
|
| Demand reduction programs [Table Text Block] |
| | | | | | Year | | Effective | | Amount | 2018 | | First billing cycle of May | | $33.0 million | 2017 | | First billing cycle of May | | $37.0 million | 2016 | | First billing cycle of May | | $37.6 million |
|
| Schedule of Changes in Gas Rate RSA [Table Text Block] |
| | | | | | | | | | Year | | Action | | Amount | | 2018 | | 4.6 | % | | Decrease | | $19.7 million | * | 2017 | | 2.2 | % | | Increase | | $8.6 million | | 2016 | | 1.2 | % | | Increase | | $4.1 million | |
|
| Schedule of Regulatory Assets [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | The Company | | Consolidated SCE&G | | | December 31, | | December 31, | Millions of dollars | | 2018 | | 2017 | | 2018 | | 2017 | Regulatory Assets: | | | | |
| | | | | Unrecovered Nuclear Project costs | | $ | 2,768 |
| | 3,976 |
| | $ | 2,768 |
| | 3,976 |
| AROs and related funding | | 406 |
| | 434 |
| | 380 |
| | 410 |
| Deferred employee benefit plan costs | | 302 |
| | 305 |
| | 272 |
| | 273 |
| Deferred losses on interest rate derivatives | | 448 |
| | 456 |
| | 448 |
| | 456 |
| Other unrecovered plant | | 93 |
| | 105 |
| | 93 |
| | 105 |
| DSM Programs | | 65 |
| | 59 |
| | 65 |
| | 59 |
| Pipeline integrity management costs | | 73 |
| | 51 |
| | 9 |
| | 8 |
| Environmental remediation costs | | 27 |
| | 30 |
| | 24 |
| | 25 |
| Deferred storm damage costs | | 35 |
| | 24 |
| | 35 |
| | 24 |
| Deferred transmission operating costs | | 15 |
| | — |
| | 15 |
| | — |
| Other | | 148 |
| | 140 |
| | 147 |
| | 140 |
| Total Regulatory Assets | | $ | 4,380 |
| | $ | 5,580 |
| | $ | 4,256 |
| | $ | 5,476 |
|
|
| Schedule of Regulatory Liabilities [Table Text Block] |
| | | | | | | | | | | | | | | | | | Regulatory Liabilities: | | | | |
| | | | | Monetization of guaranty settlement | | $ | 1,098 |
| | 1,095 |
| | $ | 1,098 |
| | 1,095 |
| Accumulated deferred income taxes | | 814 |
| | 1,076 |
| | 659 |
| | 914 |
| Asset removal costs | | 779 |
| | 757 |
| | 541 |
| | 527 |
| Deferred gains on interest rate derivatives | | 77 |
| | 131 |
| | 77 |
| | 131 |
| Other | | 21 |
| | — |
| | 5 |
| | — |
| Total Regulatory Liabilities | | $ | 2,789 |
| | $ | 3,059 |
| | $ | 2,380 |
| | $ | 2,667 |
|
|
| SCE&G |
|
| Public Utilities, General Disclosures |
|
| Demand reduction programs [Table Text Block] |
| | | | | | Year | | Effective | | Amount | 2018 | | First billing cycle of May | | $33.0 million | 2017 | | First billing cycle of May | | $37.0 million | 2016 | | First billing cycle of May | | $37.6 million |
|
| Schedule of Changes in Gas Rate RSA [Table Text Block] |
| | | | | | | | | | Year | | Action | | Amount | | 2018 | | 4.6 | % | | Decrease | | $19.7 million | * | 2017 | | 2.2 | % | | Increase | | $8.6 million | | 2016 | | 1.2 | % | | Increase | | $4.1 million | |
|
| Schedule of Regulatory Assets [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | The Company | | Consolidated SCE&G | | | December 31, | | December 31, | Millions of dollars | | 2018 | | 2017 | | 2018 | | 2017 | Regulatory Assets: | | | | |
| | | | | Unrecovered Nuclear Project costs | | $ | 2,768 |
| | 3,976 |
| | $ | 2,768 |
| | 3,976 |
| AROs and related funding | | 406 |
| | 434 |
| | 380 |
| | 410 |
| Deferred employee benefit plan costs | | 302 |
| | 305 |
| | 272 |
| | 273 |
| Deferred losses on interest rate derivatives | | 448 |
| | 456 |
| | 448 |
| | 456 |
| Other unrecovered plant | | 93 |
| | 105 |
| | 93 |
| | 105 |
| DSM Programs | | 65 |
| | 59 |
| | 65 |
| | 59 |
| Pipeline integrity management costs | | 73 |
| | 51 |
| | 9 |
| | 8 |
| Environmental remediation costs | | 27 |
| | 30 |
| | 24 |
| | 25 |
| Deferred storm damage costs | | 35 |
| | 24 |
| | 35 |
| | 24 |
| Deferred transmission operating costs | | 15 |
| | — |
| | 15 |
| | — |
| Other | | 148 |
| | 140 |
| | 147 |
| | 140 |
| Total Regulatory Assets | | $ | 4,380 |
| | $ | 5,580 |
| | $ | 4,256 |
| | $ | 5,476 |
|
|
| Schedule of Regulatory Liabilities [Table Text Block] |
| | | | | | | | | | | | | | | | | | Regulatory Liabilities: | | | | |
| | | | | Monetization of guaranty settlement | | $ | 1,098 |
| | 1,095 |
| | $ | 1,098 |
| | 1,095 |
| Accumulated deferred income taxes | | 814 |
| | 1,076 |
| | 659 |
| | 914 |
| Asset removal costs | | 779 |
| | 757 |
| | 541 |
| | 527 |
| Deferred gains on interest rate derivatives | | 77 |
| | 131 |
| | 77 |
| | 131 |
| Other | | 21 |
| | — |
| | 5 |
| | — |
| Total Regulatory Liabilities | | $ | 2,789 |
| | $ | 3,059 |
| | $ | 2,380 |
| | $ | 2,667 |
|
|
| PSNC Energy [Member] |
|
| Public Utilities, General Disclosures |
|
| Pipeline integrity management revenue requirement [Table Text Block] |
| | | | | | Rates Effective | | 2018 | | 2017 | March 1 | | $14.7 million | | $1.9 million | September 1 | | $1.1 million | | $0.7 million |
|