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PREFERRED STOCK (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jul. 13, 2018 | Jan. 09, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock shares authorized (in shares) |  |  | 50,000,000 | 50,000,000 |
Value of shares issued |  |  | $ 2,258 | $ 0 | $ 0
San Diego Gas and Electric Company [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock shares authorized (in shares) |  |  | 45,000,000 | 45,000,000 |
Number of preferred stock shares outstanding (in shares) |  |  | 0 | 0 |
Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock shares authorized (in shares) |  |  | 50,000,000 |  |
Southern California Gas Company [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock shares authorized (in shares) |  |  | 11,000,000 | 11,000,000 |
Number of preferred stock shares outstanding (in shares) |  |  | 1,000,000 | 1,000,000 |
Series A Preferred Stock [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Number of preferred stock shares outstanding (in shares) |  |  | 17,250,000 |  |
Series A Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Shares issued (in shares) |  | 17,250,000 |  |  |
Stated percentage rate |  | 6.00% |  |  |
Conversion price per share (in dollars per share) |  | $ 100 | $ 100.00 |  |
Conversion price per share net of underwriting discount (in dollars per share) |  | 98.20 |  |  |
Liquidation preference (in dollars per share) |  | $ 100.00 |  |  |
Value of shares issued | $ 565 | $ 1,690 |  |  |
Underwriting discount | $ 10 | $ 32 |  |  |
Threshold appreciation price (in dollars per share) |  | $ 131.075 | $ 131.075 |  |
Number of shares issuable |  | 13,200,000 |  |  |
Share dividends issued, percentage of weighted average share price |  | 97.00% |  |  |
Series B Preferred Stock [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Number of preferred stock shares outstanding (in shares) |  |  | 5,750,000 |  |
Series B Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Shares issued (in shares) | 5,750,000 |  |  |  |
Stated percentage rate | 6.75% |  |  |  |
Conversion price per share (in dollars per share) | $ 100 |  | $ 100.00 |  |
Conversion price per share net of underwriting discount (in dollars per share) | 98.35 |  |  |  |
Liquidation preference (in dollars per share) | 100.00 |  |  |  |
Threshold appreciation price (in dollars per share) | $ 136.500 |  | $ 136.50 |  |
Number of shares issuable | 4,200,000 |  |  |  |
Share dividends issued, percentage of weighted average share price | 97.00% |  |  |  |
So Cal Gas Series Preferred Stock [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock shares authorized (in shares) |  |  | 5,000,000 |  |
So Cal Gas Series Preferred Stock [Member] | Southern California Gas Company [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock shares authorized (in shares) |  |  | 5,000,000 |  |
Preferred stock outstanding |  |  | $ 22 | $ 22 |
Twenty Five Dollar Par, Six Percent Series [Member] | Southern California Gas Company [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock shares authorized (in shares) |  |  | 1,000,000 |  |
Number of preferred stock shares outstanding (in shares) |  |  | 79,011 |  |
Par value (in dollars per share) |  |  | $ 25 |  |
Preferred stock outstanding |  |  | $ 3 | 3 |
Twenty Five Dollar Par, Six Percent Series A [Member] | Southern California Gas Company [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Number of preferred stock shares outstanding (in shares) |  |  | 783,032 |  |
Liquidation preference (in dollars per share) |  |  | $ 25 |  |
Par value (in dollars per share) |  |  | $ 25 |  |
Preferred stock outstanding |  |  | $ 19 | 19 |
So Cal Gas Preferred Stock Owned By Pacific Enterprises [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock outstanding held by parent |  |  | $ (2) | (2) |
So Cal Gas Preferred Stock Owned By Pacific Enterprises [Member] | Southern California Gas Company [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Number of preferred stock shares outstanding (in shares) |  |  | 50,970 |  |
Preferred Stock Of Subsidiaries [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Preferred stock outstanding |  |  | $ 20 | $ 20 |
Maximum [Member] | Series A Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Threshold appreciation price (in dollars per share) |  | $ 131.075 | $ 131.075 |  |
Shares issuable for each instrument |  | 93.45% | 93.45% |  |
Maximum [Member] | Series B Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Threshold appreciation price (in dollars per share) | $ 136.500 |  | $ 136.50 |  |
Shares issuable for each instrument | 87.91% |  | 87.91% |  |
Minimum [Member] | Series A Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Threshold appreciation price (in dollars per share) |  | $ 107.000 | $ 107.00 |  |
Shares issuable for each instrument |  | 76.29% | 76.29% |  |
Minimum [Member] | Series B Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Threshold appreciation price (in dollars per share) | $ 113.750 |  | $ 113.75 |  |
Shares issuable for each instrument | 73.26% |  | 73.26% |  |
Over-Allotment Option [Member] | Series A Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Shares issued (in shares) |  | 2,250,000 |  |  |
Over-Allotment Option [Member] | Series B Preferred Stock [Member] | Sempra Energy [Member] |  |  |  |  |
Preferred Stock [Line Items] |  |  |  |  |
Shares issued (in shares) | 750,000 |  |  |  |

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