v3.6.0.2

COMMITMENTS AND CONTINGENCIES - LONG-TERM PURCHASE COMMITMENT (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2016 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2011 USD ($) MMcf
Sempra LNG & Midstream [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Equity Method Investment, Realized Gain (Loss) on Released Pipeline Capacity | $ 206,000,000 |  |  |  |
Equity Method Investment, Realized Gain (Loss) on Released Pipeline Capacity, Net of Tax | $ 123,000,000 |  |  |  |
Natural Gas Contracts [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | $ 388,000,000 |  |  |
2018 |  | 297,000,000 |  |  |
2019 |  | 139,000,000 |  |  |
2020 |  | 42,000,000 |  |  |
2021 |  | 42,000,000 |  |  |
Thereafter |  | 144,000,000 |  |  |
Total Contractual Commitments |  | 1,052,000,000 |  |  |
Unrecorded Unconditional Purchase Obligation, Purchases |  | 1,169,000,000 | $ 1,200,000,000 | $ 1,984,000,000 |
Natural Gas Contracts [Member] | SoCalGas [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 139,000,000 |  |  |
2018 |  | 105,000,000 |  |  |
2019 |  | 53,000,000 |  |  |
2020 |  | 23,000,000 |  |  |
2021 |  | 23,000,000 |  |  |
Thereafter |  | 82,000,000 |  |  |
Total Contractual Commitments |  | 425,000,000 |  |  |
Unrecorded Unconditional Purchase Obligation, Purchases |  | 966,000,000 | 975,000,000 | 1,735,000,000 |
Natural Gas Transportation Contracts [Member] | SoCalGas [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 123,000,000 |  |  |
2018 |  | 104,000,000 |  |  |
2019 |  | 52,000,000 |  |  |
2020 |  | 23,000,000 |  |  |
2021 |  | 23,000,000 |  |  |
Thereafter |  | 82,000,000 |  |  |
Total Contractual Commitments |  | 407,000,000 |  |  |
Natural Gas Supply Contracts [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 148,000,000 |  |  |
2018 |  | 84,000,000 |  |  |
2019 |  | 1,000,000 |  |  |
2020 |  | 0 |  |  |
2021 |  | 0 |  |  |
Thereafter |  | 0 |  |  |
Total Contractual Commitments |  | 233,000,000 |  |  |
Natural Gas Supply Contracts [Member] | SoCalGas [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 16,000,000 |  |  |
2018 |  | 1,000,000 |  |  |
2019 |  | 1,000,000 |  |  |
2020 |  | 0 |  |  |
2021 |  | 0 |  |  |
Thereafter |  | 0 |  |  |
Total Contractual Commitments |  | 18,000,000 |  |  |
Natural Gas Storage and Transportation Contracts [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 240,000,000 |  |  |
2018 |  | 213,000,000 |  |  |
2019 |  | 138,000,000 |  |  |
2020 |  | 42,000,000 |  |  |
2021 |  | 42,000,000 |  |  |
Thereafter |  | 144,000,000 |  |  |
Total Contractual Commitments |  | 819,000,000 |  |  |
Purchased Power Contracts [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 666,000,000 |  |  |
2018 |  | 672,000,000 |  |  |
2019 |  | 664,000,000 |  |  |
2020 |  | 606,000,000 |  |  |
2021 |  | 608,000,000 |  |  |
Thereafter |  | 6,205,000,000 |  |  |
Total Contractual Commitments |  | 9,421,000,000 |  |  |
Unrecorded Unconditional Purchase Obligation, Purchases |  | 1,667,000,000 | 1,573,000,000 | 1,574,000,000 |
Purchased Power Contracts [Member] | SDG&E [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 563,000,000 |  |  |
2018 |  | 556,000,000 |  |  |
2019 |  | 546,000,000 |  |  |
2020 |  | 487,000,000 |  |  |
2021 |  | 487,000,000 |  |  |
Thereafter |  | 5,865,000,000 |  |  |
Total Contractual Commitments |  | 8,504,000,000 |  |  |
Unrecorded Unconditional Purchase Obligation, Purchases |  | $ 752,000,000 | $ 715,000,000 | $ 710,000,000 |
Sunrise Powerlink Construction [Member] | SDG&E [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Contractual Commitment Annual Escalation Percentage |  | 2.00% |  |  |
Contractual Commitment Future Annual Payment Amount |  | $ 3,000,000 |  |  |
Contractual commitment period |  | 53 years |  |  |
Contractual Commitment Present Value Future Payments, Regulatory Asset |  | $ 118,000,000 |  |  |
Contractual Commitment Future Payments, Liability |  | 118,000,000 |  |  |
Continental Forge [Member] | Sempra LNG and Midstream [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Contractual commitment period |  |  |  |  | 18 years
Amount of Natural Gas to be Sold | MMcf |  |  |  |  | 500
Reduction in price index |  |  |  |  | $ 0.02
Liquefied Natural Gas Contracts [Member] | Sempra LNG and Midstream [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 446,000,000 |  |  |
2018 |  | 459,000,000 |  |  |
2019 |  | 416,000,000 |  |  |
2020 |  | 423,000,000 |  |  |
2021 |  | 434,000,000 |  |  |
Thereafter |  | 4,004,000,000 |  |  |
Total Contractual Commitments |  | 6,182,000,000 |  |  |
Nuclear Plant Maintenance [Member] | San Diego Gas and Electric Company [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Long-term Purchase Commitment, Amount |  | 14,000,000 |  |  |
Infrastructure Construction And Improvements [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 398,000,000 |  |  |
2018 |  | 73,000,000 |  |  |
2019 |  | 44,000,000 |  |  |
2020 |  | 39,000,000 |  |  |
2021 |  | 28,000,000 |  |  |
Thereafter |  | 245,000,000 |  |  |
Long-term Purchase Commitment, Amount |  | 827,000,000 |  |  |
Infrastructure Construction And Improvements [Member] | SDG&E [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 59,000,000 |  |  |
2018 |  | 44,000,000 |  |  |
2019 |  | 17,000,000 |  |  |
2020 |  | 12,000,000 |  |  |
2021 |  | 3,000,000 |  |  |
Thereafter |  | 8,000,000 |  |  |
Long-term Purchase Commitment, Amount |  | 143,000,000 |  |  |
Infrastructure Construction And Improvements [Member] | Sempra South American Utilities [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 21,000,000 |  |  |
Infrastructure Construction And Improvements [Member] | Southern California Gas Company [Member] | SoCalGas [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 3,000,000 |  |  |
2018 |  | 3,000,000 |  |  |
2019 |  | 3,000,000 |  |  |
2020 |  | 4,000,000 |  |  |
Total Contractual Commitments |  | 13,000,000 |  |  |
Infrastructure Improvements For Natural Gas And Electric Transmission And Distribution [Member] | SDG&E [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Long-term Purchase Commitment, Amount |  | $ 80,000,000 |  |  |
Long-term Contracts [Member] | San Diego Gas and Electric Company [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Purchase Commitment Component Percentage |  | 40.00% |  |  |
Other Owned Generation [Member] | San Diego Gas and Electric Company [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Purchase Commitment Component Percentage |  | 45.00% |  |  |
Spot Market Purchases [Member] | San Diego Gas and Electric Company [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Purchase Commitment Component Percentage |  | 15.00% |  |  |
Renewable Energy Contracts Expiring Through 2041 [Member] | San Diego Gas and Electric Company [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Purchase Commitment Component Percentage |  | 35.00% |  |  |
Sempra Renewables Construction [Member] | Sempra Renewables [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | $ 166,000,000 |  |  |
Sempra Natural Gas Construction [Member] | Sempra LNG and Midstream [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 14,000,000 |  |  |
San Luis Rey Synchronous Condensor And Bay Boulevard Substation [Member] | SDG&E [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Purchases |  | 49,000,000 |  |  |
Pipelines [Member] | Sempra Mexico [Member] |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract] |  |  |  |  |
2017 |  | 135,000,000 |  |  |
2018 |  | 26,000,000 |  |  |
2019 |  | 24,000,000 |  |  |
2020 |  | 23,000,000 |  |  |
2021 |  | 25,000,000 |  |  |
Thereafter |  | 237,000,000 |  |  |
Total Contractual Commitments |  | $ 470,000,000 |  |  |

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Name: | us-gaap_StatementBusinessSegmentsAxis=sre_SempraMexicoSegmentMember
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Data Type: | na
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