v2.4.1.9

OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Capitalized Financing Costs Disclosure [Line Items] |  |
AFUDC related to debt | $ 6 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest | $ 6 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
AFUDC related to equity | 27 sre_AllowanceForFundsUsedDuringConstructionFromCapitalizedEquityCosts | 25 sre_AllowanceForFundsUsedDuringConstructionFromCapitalizedEquityCosts
Other capitalized financing costs | 17 us-gaap_InterestCostsCapitalized | 8 us-gaap_InterestCostsCapitalized
Total capitalized financing costs | 50 sre_CapitalizedFinancingCosts | 39 sre_CapitalizedFinancingCosts
San Diego Gas and Electric Company [Member] |  |
Capitalized Financing Costs Disclosure [Line Items] |  |
AFUDC related to debt | 3 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 4 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
AFUDC related to equity | 8 sre_AllowanceForFundsUsedDuringConstructionFromCapitalizedEquityCosts / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 11 sre_AllowanceForFundsUsedDuringConstructionFromCapitalizedEquityCosts / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
Total capitalized financing costs | 11 sre_CapitalizedFinancingCosts / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 15 sre_CapitalizedFinancingCosts / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
Southern California Gas Company [Member] |  |
Capitalized Financing Costs Disclosure [Line Items] |  |
AFUDC related to debt | 3 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember | 2 us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember
AFUDC related to equity | 9 sre_AllowanceForFundsUsedDuringConstructionFromCapitalizedEquityCosts / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember | 5 sre_AllowanceForFundsUsedDuringConstructionFromCapitalizedEquityCosts / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember
Total capitalized financing costs | $ 12 sre_CapitalizedFinancingCosts / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember | $ 7 sre_CapitalizedFinancingCosts / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember

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- Definition Allowance for funds used during construction from capitalized equity costs. + References No definition available. + Details
Name: | sre_AllowanceForFundsUsedDuringConstructionFromCapitalizedEquityCosts
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Total capitalized financing costs from both debt and equity instruments. + References No definition available. + Details
Name: | sre_CapitalizedFinancingCosts
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | sre_CapitalizedFinancingCostsDisclosureLineItems
Namespace Prefix: | sre_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of interest capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Allowance for Funds Used during Construction -URI http://asc.fasb.org/extlink&oid=6504829 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
Name: | us-gaap_InterestCostsCapitalized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount capitalized of allowance for funds used during construction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Allowance for Funds Used during Construction -URI http://asc.fasb.org/extlink&oid=6504829 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 835 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501662&loc=d3e56162-110433 + Details
Name: | us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=sre_SanDiegoGasAndElectricCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=sre_SouthernCaliforniaGasCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |