COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) - USD ($)
$ in Millions |
9 Months Ended |
|
Sep. 30, 2016 |
Dec. 31, 2015 |
| Sempra Energy [Member] |
|
|
| Unrecorded Unconditional Purchase Obligation [Line Items] |
|
|
| Increase in asset retirement obligations |
$ 342
|
|
| Southern California Gas Company [Member] |
|
|
| Unrecorded Unconditional Purchase Obligation [Line Items] |
|
|
| Increase in asset retirement obligations |
316
|
|
| Sempra Natural Gas [Member] | Natural Gas Contracts [Member] |
|
|
| Unrecorded Unconditional Purchase Obligation [Line Items] |
|
|
| Increase (decrease) in commitment amount |
(224)
|
|
| Increase (decrease) in commitment amount, 2016 |
(168)
|
|
| Increase (decrease) in commitment amount, 2017 |
2
|
|
| Increase (decrease) in commitment amount, 2018 |
(17)
|
|
| Increase (decrease) in commitment amount, 2019 |
(20)
|
|
| Increase (decrease) in commitment amount, 2020 |
(8)
|
|
| Increase (decrease) in commitment amount, thereafter |
(13)
|
|
| Charges related to permanent capacity releases, pretax |
206
|
|
| Charges related to permanent capacity releases, after tax |
123
|
|
| Obligation to make future capacity payments, current |
44
|
|
| Obligation to make future capacity payments, noncurrent |
106
|
|
| Sempra Natural Gas [Member] | Liquefied Natural Gas Contracts [Member] |
|
|
| Unrecorded Unconditional Purchase Obligation [Line Items] |
|
|
| Increase (decrease) in commitment amount, 2016 |
(306)
|
|
| Increase (decrease) in commitment amount, 2017 |
41
|
|
| Increase (decrease) in commitment amount, 2018 |
(18)
|
|
| Increase (decrease) in commitment amount, 2019 |
(59)
|
|
| Increase (decrease) in commitment amount, 2020 |
(98)
|
|
| Increase (decrease) in commitment amount, thereafter |
$ (542)
|
|
| Escalation percentage beyond year 2028 |
1.00%
|
|
| San Diego Gas and Electric Company [Member] |
|
|
| Unrecorded Unconditional Purchase Obligation [Line Items] |
|
|
| Increase in asset retirement obligations |
$ 26
|
|
| San Diego Gas and Electric Company [Member] | Purchased Power Contracts [Member] |
|
|
| Unrecorded Unconditional Purchase Obligation [Line Items] |
|
|
| Increase (decrease) in commitment amount |
526
|
|
| Increase (decrease) in commitment amount, 2016 |
19
|
|
| Increase (decrease) in commitment amount, 2017 |
56
|
|
| Increase (decrease) in commitment amount, 2018 |
57
|
|
| Increase (decrease) in commitment amount, 2019 |
57
|
|
| Increase (decrease) in commitment amount, 2020 |
57
|
|
| Increase (decrease) in commitment amount, thereafter |
280
|
|
| Power transmission tolling fee |
|
$ 1,400
|
| Sempra Mexico [Member] | Construction and Development Projects [Member] |
|
|
| Unrecorded Unconditional Purchase Obligation [Line Items] |
|
|
| Increase (decrease) in commitment amount, 2016 |
180
|
|
| Commitment amount due in remainder of fiscal year |
4
|
|
| Commitment amount due in 2017 |
15
|
|
| Commitment amount due in 2018 |
15
|
|
| Commitment amount due in 2019 |
16
|
|
| Commitment amount due in 2020 |
16
|
|
| Commitment amount due thereafter |
$ 114
|
|