NUCLEAR PLANT - INVESTMENT (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
|
| Nuclear Plant Investment [Line Items] | ||
| Loss From Plant Closure, Pretax | $ 0 | $ (21) |
| Loss (Adjustment) From Plant Closure, After Tax | (13) | |
| Loss from plant closure, after-tax (cumulative) | $ 125 | |
| Nuclear Plant, Ownership Percentage | 20.00% | |
| San Diego Gas and Electric Company [Member] | ||
| Nuclear Plant Investment [Line Items] | ||
| Utility plant closure (adjustment) loss | $ 0 | (21) |
| Loss (Adjustment) From Plant Closure, After Tax | $ (13) | |
| Loss from plant closure, after-tax (cumulative) | $ 125 | |
| Nuclear Plant, Ownership Percentage | 20.00% | |