DERIVATIVE FINANCIAL INSTRUMENTS 6 (Details) - USD ($) $ in Millions |
Jun. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Derivative Credit Risk Related Contingent Features [Line Items] | ||
| Derivative, Net Liability Position, Aggregate Fair Value | $ 5 | $ 9 |
| Additional Collateral Aggregate Fair Value | 5 | |
| San Diego Gas and Electric Company [Member] | ||
| Derivative Credit Risk Related Contingent Features [Line Items] | ||
| Derivative, Net Liability Position, Aggregate Fair Value | 4 | $ 2 |
| Additional Collateral Aggregate Fair Value | $ 4 |