v2.4.1.9

NUCLEAR PLANT 1 (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014 | Jun. 30, 2013
Nuclear Plant [Line Items] |  |  |  |  |
Nuclear decommissioning trusts | $ 1,150 us-gaap_DecommissioningFundInvestments | $ 1,131 us-gaap_DecommissioningFundInvestments | [1] |  |
Nuclear Plant Investment [Line Items] |  |  |  |  |
Plant closure (adjustment) loss | (21)sre_LossFromPlantClosurePretax |  |  | (13)sre_LossFromPlantClosurePretax |
Loss (Adjustment) From Plant Closure, After Tax | (13)sre_AdjustmentToLossFromPlantClosureAfterTax | 12 sre_AdjustmentToLossFromPlantClosureAfterTax |  | 9 sre_AdjustmentToLossFromPlantClosureAfterTax |
Loss from plant closure, after-tax (cumulative) | 127 sre_LossFromPlantClosureAfterTax |  |  |  | 119 sre_LossFromPlantClosureAfterTax
Charge To Reduce Certain Tax Regulatory Assets Attributable To Nuclear Plant |  |  |  | 17 sre_ChargeToReduceTaxRegulatoryAssetsAttributableToNuclearPlant |
Regulatory Asset, Current, Nuclear Plant Closure | 41 sre_RegulatoryAssetCurrentNuclearPlantClosure |  |  |  |
Regulatory Asset, Nuclear Plant Closure | 294 sre_RegulatoryAssetNuclearPlantClosure |  |  |  |
Regulatory Asset, Noncurrent, Nuclear Plant Closure | 253 sre_RegulatoryAssetNoncurrentNuclearPlantClosure |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Five-year research funding commitment, annual amount | 1 us-gaap_OtherCommitment |  |  |  |
San Diego Gas and Electric Company [Member] |  |  |  |  |
Nuclear Plant [Line Items] |  |  |  |  |
Nuclear decommissioning trusts | 1,150 us-gaap_DecommissioningFundInvestments / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 1,131 us-gaap_DecommissioningFundInvestments / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | [1] |  |
Nuclear Plant Investment [Line Items] |  |  |  |  |
Utility plant closure (adjustment) loss | (21)sre_UtilityLossFromPlantClosurePretax / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  | (13)sre_UtilityLossFromPlantClosurePretax / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
Loss (Adjustment) From Plant Closure, After Tax | (13)sre_AdjustmentToLossFromPlantClosureAfterTax / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 12 sre_AdjustmentToLossFromPlantClosureAfterTax / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  | 9 sre_AdjustmentToLossFromPlantClosureAfterTax / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
Loss from plant closure, after-tax (cumulative) | 127 sre_LossFromPlantClosureAfterTax / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |  | 119 sre_LossFromPlantClosureAfterTax / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
Charge To Reduce Certain Tax Regulatory Assets Attributable To Nuclear Plant |  |  |  | 17 sre_ChargeToReduceTaxRegulatoryAssetsAttributableToNuclearPlant / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
Regulatory Asset, Current, Nuclear Plant Closure | 41 sre_RegulatoryAssetCurrentNuclearPlantClosure / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |  |
Regulatory Asset, Nuclear Plant Closure | 294 sre_RegulatoryAssetNuclearPlantClosure / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |  |
Regulatory Asset, Noncurrent, Nuclear Plant Closure | 253 sre_RegulatoryAssetNoncurrentNuclearPlantClosure / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Five-year research funding commitment, annual amount | $ 1 us-gaap_OtherCommitment / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |  |
Nuclear Plant, SDGE [Member] |  |  |  |  |
Nuclear Plant [Line Items] |  |  |  |  |
Nuclear Plant, Ownership Percentage | 20.00%sre_NuclearPlantOwnershipPercentage / sre_NuclearPlantOwnershipAxis = sre_NuclearPlantSdgeMember |  |  |  |
[1] | Derived from audited financial statements.

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- Definition Adjustment To Loss From Plant Closure, After Tax. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Charge To Reduce Tax Regulatory Assets Attributable To Nuclear Plant. + References No definition available. + Details
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- Definition Loss from plant closure, after-tax. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Loss from plant closure, pretax. + References No definition available. + Details
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Namespace Prefix: | sre_
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Balance Type: | debit
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- Details
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- Details
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- Definition Nuclear Plant, Ownership Percentage. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Regulatory Asset, Nuclear Plant Closure. + References No definition available. + Details
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Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Utility loss from plant closure, pretax. + References No definition available. + Details
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- Definition Decommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues derived from utility assessments and government appropriations. Decommission fund investment for the process whereby a power station, at the end of its economic life, is taken permanently out of service and its site made available for other purposes. In the case of a nuclear station this comprises three different states of clearance. Immediately after the final closure, radioactive material such as nuclear fuel and operational waste is removed and the buildings surrounding the reactor shield are dismantled and finally the reactor itself is dismantled. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 12 -Article 5 + Details
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Details
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- Details
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- Details
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Balance Type: |
Period Type: |