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GENERAL INFORMATION AND OTHER FINANCIAL DATA - OTHER NONCONTROLLING INTERESTS (Details) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Feb. 07, 2019 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Noncontrolling Interest [Line Items] |  |  |  |  |
Repurchases of common stock |  | $ 14 | $ 19 |  |
Other noncontrolling interests |  | $ 2,104 |  | $ 2,090 | [1]
Infraestructura Energética Nova [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Common stock repurchased (in shares) |  | 1,600,000 |  |  |
Repurchases of common stock |  | $ 6 |  |  |
San Diego Gas and Electric Company [Member] | Otay Mesa VIE [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 100.00% |  | 100.00% |
Other noncontrolling interests |  | $ 102 |  | $ 100 |
Sempra Mexico [Member] | IEnova [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 33.40% |  | 33.50% |
Other noncontrolling interests |  | $ 1,611 |  | $ 1,592 |
Sempra Mexico [Member] | Ownership Interests Held By Others, IEnova, Subsidiary One [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Other noncontrolling interests |  | $ 13 |  | $ 13 |
Sempra Mexico [Member] | Ownership Interests Held By Others, IEnova, Subsidiary One [Member] | Minimum [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 10.00% |  | 10.00% |
Sempra Mexico [Member] | Ownership Interests Held By Others, IEnova, Subsidiary One [Member] | Maximum [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 47.60% |  | 49.00% |
Sempra Renewables [Member] | Tax equity arrangement – wind [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Other noncontrolling interests |  | $ 161 |  | $ 158 |
Sempra Renewables [Member] | PXISE Energy Solutions LLC [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 11.10% |  | 11.10% |
Other noncontrolling interests |  | $ 0 |  | $ 1 |
Sempra LNG [Member] | Bay Gas Storage Company, Ltd. [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 0.00% |  | 9.10% |
Other noncontrolling interests |  | $ 0 |  | $ 18 |
Sempra LNG [Member] | Liberty Gas Storage, LLC [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 24.60% |  | 24.60% |
Other noncontrolling interests |  | $ (12) |  | $ (12) |
Sempra South American Utilities [Member] | Chilquinta Energía subsidiaries [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Other noncontrolling interests |  | $ 24 |  | $ 23 |
Sempra South American Utilities [Member] | Chilquinta Energía subsidiaries [Member] | Minimum [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 19.70% |  | 19.70% |
Sempra South American Utilities [Member] | Chilquinta Energía subsidiaries [Member] | Maximum [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 43.40% |  | 43.40% |
Sempra South American Utilities [Member] | Luz del Sur [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 16.40% |  | 16.40% |
Other noncontrolling interests |  | $ 201 |  | $ 193 |
Sempra South American Utilities [Member] | Tecsur [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Percent ownership held by noncontrolling interests |  | 9.80% |  | 9.80% |
Other noncontrolling interests |  | $ 4 |  | $ 4 |
Infraestructura Energética Nova [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Ownership interest |  | 66.60% |  | 66.50% |
Bay Gas [Member] | Sempra LNG [Member] |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Payment to acquire remaining interest in Bay Gas | $ 20 |  |  |  |
Sale of interest | 100.00% |  |  |  |
[1] | Derived from audited financial statements.

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