XML 171 R139.htm IDEA: XBRL DOCUMENT
v3.10.0.1

COMMITMENTS AND CONTINGENCIES - ENVIRONMENTAL ISSUES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Environmental Issues [Line Items] |  |  |
Environmental Costs Recognized, Capitalized in Period | $ 101 | $ 92 | $ 53
San Diego Gas and Electric Company [Member] |  |  |
Environmental Issues [Line Items] |  |  |
Environmental Costs Recognized, Capitalized in Period | 38 | 46 | 17
Southern California Gas Company [Member] |  |  |
Environmental Issues [Line Items] |  |  |
Environmental Costs Recognized, Capitalized in Period | $ 62 | $ 45 | $ 35

X
- References No definition available. + Details
Name: | sre_EnvironmentalIssuesLineItems
Namespace Prefix: | sre_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of environmental remediation costs capitalized. These expenditures may relate to long-lived improvements in operating facilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 25 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=39739230&loc=d3e11660-110855 + Details
Name: | us-gaap_EnvironmentalCostsRecognizedCapitalizedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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