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SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - OTHER NONCONTROLLING INTERESTS (Details) $ in Millions | Dec. 31, 2018 USD ($) subsidiary | Dec. 31, 2017 USD ($)
--- | --- | ---
Noncontrolling Interest [Line Items] |  |
Other noncontrolling interests | $ 2,090 | $ 2,450
SDG&E [Member] | Otay Mesa VIE [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 100.00% | 100.00%
Other noncontrolling interests | $ 100 | $ 28
Sempra South American Utilities [Member] | Chilquinta Energia subsidiaries [Member] |  |
Noncontrolling Interest [Line Items] |  |
Other noncontrolling interests | $ 23 | $ 24
Number of subsidiaries with noncontrolling interests | subsidiary | 4 |
Sempra South American Utilities [Member] | Chilquinta Energia subsidiaries [Member] | Minimum [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 19.70% | 22.90%
Sempra South American Utilities [Member] | Chilquinta Energia subsidiaries [Member] | Maximum [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 43.40% | 43.40%
Sempra South American Utilities [Member] | Luz Del Sur [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 16.40% | 16.40%
Other noncontrolling interests | $ 193 | $ 189
Sempra South American Utilities [Member] | Tecsur [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 9.80% | 9.80%
Other noncontrolling interests | $ 4 | $ 4
Sempra Mexico [Member] | IEnova [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 33.50% | 33.60%
Other noncontrolling interests | $ 1,605 | $ 1,532
Sempra Renewables [Member] | Tax equity arrangement – wind [Member] |  |
Noncontrolling Interest [Line Items] |  |
Other noncontrolling interests | $ 158 | 181
Sempra Renewables [Member] | Tax equity arrangement – solar [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 0.00% |
Other noncontrolling interests | $ 0 | $ 450
Sempra Renewables [Member] | PXISE Energy Solutions LLC [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 11.10% | 0.00%
Other noncontrolling interests | $ 1 | $ 0
Sempra LNG & Midstream [Member] | Bay Gas Storage Company [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 9.10% | 9.10%
Other noncontrolling interests | $ 18 | $ 28
Sempra LNG & Midstream [Member] | Liberty Gas Storage [Member] |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 24.60% | 24.60%
Other noncontrolling interests | $ (12) | $ 14
Subsidiaries [Member] | Sempra Mexico [Member] | IEnova subsidiary, one |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 10.00% | 10.00%
Subsidiaries [Member] | Sempra Mexico [Member] | IEnova subsidiary, two |  |
Noncontrolling Interest [Line Items] |  |
Ownership percentage held by noncontrolling owners | 49.00% |
Other noncontrolling interests | $ 13 |

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