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SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NONCONTROLLING INTERESTS NARATIVE (Details) $ / shares in Units, $ / shares in Units, $ in Millions, $ in Billions |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |
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Jun. 01, 2022 USD ($) | Oct. 01, 2021 USD ($) | Sep. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Oct. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) $ / shares shares | Sep. 30, 2021 MXN ($) $ / shares shares | Jul. 31, 2021 USD ($) | May 31, 2021 USD ($) shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) shares | Feb. 20, 2024 shares | Dec. 21, 2021 USD ($) | Oct. 15, 2021 $ / shares | Aug. 31, 2021 | Apr. 30, 2021
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in the noncontrolling interest balance from the sale of noncontrolling interest |  |  |  |  |  |  |  |  |  | $ 1,234 | $ 1,419 | $ 2,712 |  |  |  |  |
Payments to noncontrolling interests |  |  |  |  |  |  |  |  |  | 0 | 0 | 224 |  |  |  |  |
Contributions |  |  |  |  |  |  |  |  |  | $ 1,625 | $ 31 | $ 4 |  |  |  |  |
Shares issued in IEnova exchange offer | shares |  |  |  |  |  |  |  |  | 24,613,554 | 0 | 0 | 24,613,554 |  |  |  |  |
Net income, income tax expense (benefit), attributable to parent |  |  |  |  |  |  |  |  |  | $ 490 | $ 556 | $ 99 |  |  |  |  |
IEnova |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock acquired (in shares) | shares |  |  |  |  |  | 51,014,545 | 51,014,545 |  | 381,015,194 |  |  |  |  |  |  |  |
Common stock exchange ratio |  |  |  |  |  |  |  |  | 0.0646 |  |  |  |  |  |  |  |
Increase in shareholders' equity |  |  |  |  |  | $ 72 |  |  |  |  |  |  |  |  |  |  |
Common stock acquired |  |  |  |  |  | $ 202 | $ 4.0 |  |  |  |  |  |  |  |  |  |
Share price (in dollars per share) | (per share) |  |  |  |  |  | $ 3.95 | $ 78.97 |  |  |  |  |  |  |  |  |  |
ICM Ventures Holdings B.V. | Sempra Infrastructure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by noncontrolling owners |  |  |  |  |  |  |  | 17.50% |  |  |  |  |  |  |  |  |
Payments to acquire minority interest |  |  |  |  |  |  |  | $ 7 |  |  |  |  |  |  |  |  |
IEnova |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  |  |  |  | 96.40% | 99.90% |  |  |  |  |  | 96.40% | 70.20%
Decrease in equity held by NCI |  |  |  |  |  | $ 188 |  |  | $ 1,400 |  |  |  |  |  |  |  |
Increase in shareholders' equity |  |  |  |  |  | 17 |  |  | 1,400 |  |  |  |  |  |  |  |
Purchase of noncontrolling interest, transaction costs |  |  |  |  |  | $ 4 |  |  | $ 12 |  |  |  |  |  |  |  |
Share price (in pesos per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 78.97 |  |
Noncontrolling interest, remaining shares of noncontrolling interest | shares |  |  |  |  |  |  |  |  |  | 1,212,981 |  |  |  |  |  |  |
IEnova | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, remaining shares of noncontrolling interest | shares |  |  |  |  |  |  |  |  |  |  |  |  | 894,092 |  |  |  |
SI Partners | Abu Dhabi Investment Authority |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |
Sale of noncontrolling interest, purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,700 |  |  |
SI Partners | KKR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest (as a percent) |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Net income, income tax expense (benefit), attributable to parent |  |  |  |  | $ 72 |  |  |  |  |  |  |  |  |  |  |  |
SI Partners | Sempra Infrastructure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest, purchase price |  | $ 3,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in the noncontrolling interest balance from the sale of noncontrolling interest | $ 709 | 1,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest, change in equity | 710 | 1,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest, transaction costs | 12 | 173 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest, deferred income tax liability | 300 | 490 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest, transaction costs reimbursed | $ 10 | $ 149 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by noncontrolling owners |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |  |
Port Arthur LNG | SI Partners | KKR Denali |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by noncontrolling owners |  |  | 42.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Port Arthur LNG | Indirect Subsidiary Of SI Partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by noncontrolling owners |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, funding commitment, percentage |  |  |  | 110.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, guaranteed funding commitment, percentage |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |
SI Partners Subsidiary | Indirect Subsidiary Of SI Partners | KKR Denali |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by noncontrolling owners |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Port Arthur LNG |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions |  |  |  | $ 234 |  |  |  |  |  |  |  |  |  |  |  |  |
Port Arthur LNG | KKR Denali |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in the noncontrolling interest balance from the sale of noncontrolling interest |  |  | $ 61 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions |  |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, increase from sale of parent equity interest, net of transaction costs |  |  | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, increase from sale of parent equity interest, tax expense (benefit) |  |  | (23) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Port Arthur LNG | SI Partners | KKR Denali |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of noncontrolling interest, cash consideration, minimum interest transferred |  |  | $ 976 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Port Arthur LNG | Indirect Subsidiary Of SI Partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in the noncontrolling interest balance from the sale of noncontrolling interest |  |  |  | 12 |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, funding commitment |  |  |  | 9,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, increase from sale of parent equity interest, net of transaction costs |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, increase from sale of parent equity interest, tax expense (benefit) |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture of interest in joint venture |  |  |  | $ 254 |  |  |  |  |  |  |  |  |  |  |  |  |
SI Partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in the noncontrolling interest balance from the sale of noncontrolling interest |  |  |  |  |  |  |  |  |  | $ 200 |  |  |  |  |  |  |
Sale of noncontrolling interest, change in equity |  |  |  |  |  |  |  |  |  | 145 |  |  |  |  |  |  |
SI Partners | KKR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest, funding commitment |  | $ 200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to noncontrolling interests |  |  |  |  |  |  |  |  |  | $ 200 |  |  |  |  |  |  |

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