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COMMITMENTS AND CONTINGENCIES - SITE CONTINGENCY (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | $ 37
Accrual for environmental loss contingencies, current | 10
Accrual for environmental loss contingencies, noncurrent | 27
Manufactured Gas Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 30
Waste Disposal Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 4
Other Hazardous Waste Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 3
San Diego Gas and Electric Company [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 5
Accrual for environmental loss contingencies, current | 1
Accrual for environmental loss contingencies, noncurrent | 4
Estimated SONGS mitigation costs, recoverable in rates | 68
SONGS mitigation costs incurred | 45
SONGS mitigation costs remaining | $ 23
San Diego Gas and Electric Company [Member] | Manufactured Gas Sites [Member] |
Site Contingency [Line Items] |
Site Contingency, Sites Completed | 3
Site Contingency, Sites In Process | 0
Accrual for environmental loss contingencies | $ 0
San Diego Gas and Electric Company [Member] | Waste Disposal Sites [Member] |
Site Contingency [Line Items] |
Site Contingency, Sites Completed | 2
Site Contingency, Sites In Process | 1
Accrual for environmental loss contingencies | $ 2
San Diego Gas and Electric Company [Member] | Other Hazardous Waste Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 3
San Diego Gas and Electric Company [Member] | California Coastal Reef Expansion [Member] |
Site Contingency [Line Items] |
SONGS mitigation costs remaining | 4
Southern California Gas Company [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 31
Accrual for environmental loss contingencies, current | 9
Accrual for environmental loss contingencies, noncurrent | $ 22
Southern California Gas Company [Member] | Manufactured Gas Sites [Member] |
Site Contingency [Line Items] |
Site Contingency, Sites Completed | 39
Site Contingency, Sites In Process | 3
Accrual for environmental loss contingencies | $ 30
Southern California Gas Company [Member] | Waste Disposal Sites [Member] |
Site Contingency [Line Items] |
Site Contingency, Sites Completed | 5
Site Contingency, Sites In Process | 2
Accrual for environmental loss contingencies | $ 1
Southern California Gas Company [Member] | Other Hazardous Waste Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 0
Other Sempra Energy [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 1
Other Sempra Energy [Member] | Manufactured Gas Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 0
Other Sempra Energy [Member] | Waste Disposal Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | 1
Other Sempra Energy [Member] | Other Hazardous Waste Sites [Member] |
Site Contingency [Line Items] |
Accrual for environmental loss contingencies | $ 0

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