COMMITMENTS AND CONTINGENCIES - NUCLEAR INSURANCE (Details) - San Diego Gas and Electric Company [Member] $ in Thousands |
Dec. 31, 2016
USD ($)
|
|---|---|
| Schedule Of Nuclear Insurance [Line Items] | |
| Nuclear Liability Insurance Coverage, Maximum | $ 375,000 |
| Secondary Financial Protection, Maximum | 13,000,000 |
| Secondary Financial Protection, Company Contribution, Maximum | 50,930 |
| Secondary Financial Protection, Company Contribution, Annual Maximum | 7,600 |
| Nuclear Property Insurance Coverage, Maximum | 2,750,000 |
| Nuclear Property Damage Insurance, Premium Assessment | 10,400 |
| Nuclear Property Insurance Terrorism Coverage, Maximum | 3,240,000 |
| Nuclear Property Damage Insurance, Deductible Per Event | $ 2,500 |