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FAIR VALUE MEASUREMENTS - RECURRING FAIR VALUE MEASURES (Details) - Recurring - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | $ 925 | $ 879
Short-term investments held in Rabbi Trust | 59 | 67
Support Agreement, net of related guarantee fees | 24 | 23
Netting adjustment | 36 | 96
Total | 1,198 | 1,168
Liabilities, Fair Value Disclosure [Abstract] |  |
Netting adjustment | (59) | (19)
Total | 75 | 226
Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 18 | 21
Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 319 | 312
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 70 | 51
Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 287 | 275
Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 231 | 220
Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 588 | 546
Interest rate instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 0 | 0
Derivative assets, Total | 77 | 87
Liabilities, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 0 |
Derivative liabilities | 3 |
Commodity contracts not subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 15 | 74
Derivative assets, Total | 74 | 79
Liabilities, Fair Value Disclosure [Abstract] |  |
Netting adjustment | (40) | 0
Derivative liabilities | 24 | 6
Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 21 | 22
Derivative assets, Total | 33 | 33
Liabilities, Fair Value Disclosure [Abstract] |  |
Netting adjustment | (19) | (19)
Derivative liabilities | 47 | 211
Foreign exchange instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 0 |
Derivative assets, Total | 6 |
Liabilities, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 0 | 0
Derivative liabilities | 1 | 9
Level 1 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 375 | 361
Short-term investments held in Rabbi Trust | 59 | 67
Support Agreement, net of related guarantee fees | 0 | 0
Total | 444 | 428
Liabilities, Fair Value Disclosure [Abstract] |  |
Total | 18 | 20
Level 1 | Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 15 | 19
Level 1 | Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 315 | 308
Level 1 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 45 | 34
Level 1 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 1 | Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 1 | Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 45 | 34
Level 1 | Interest rate instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 0 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 |
Level 1 | Commodity contracts not subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 6 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 | 0
Level 1 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 4 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 18 | 20
Level 1 | Foreign exchange instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 0 |
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 | 0
Level 2 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 550 | 518
Short-term investments held in Rabbi Trust | 0 | 0
Support Agreement, net of related guarantee fees | 0 | 0
Total | 688 | 611
Liabilities, Fair Value Disclosure [Abstract] |  |
Total | 116 | 225
Level 2 | Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 3 | 2
Level 2 | Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 4 | 4
Level 2 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 25 | 17
Level 2 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 287 | 275
Level 2 | Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 231 | 220
Level 2 | Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 543 | 512
Level 2 | Interest rate instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 77 | 87
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 3 |
Level 2 | Commodity contracts not subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 53 | 5
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 64 | 6
Level 2 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 2 | 1
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 48 | 210
Level 2 | Foreign exchange instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 6 |
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 1 | 9
Level 3 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Short-term investments held in Rabbi Trust | 0 | 0
Support Agreement, net of related guarantee fees | 24 | 23
Total | 30 | 33
Liabilities, Fair Value Disclosure [Abstract] |  |
Total | 0 | 0
Level 3 | Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 3 | Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 3 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 3 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 3 | Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 3 | Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Level 3 | Interest rate instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 0 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 |
Level 3 | Commodity contracts not subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 0 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 | 0
Level 3 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 6 | 10
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 | 0
Level 3 | Foreign exchange instruments |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 0 |
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 | 0
SDG&E |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 925 | 879
Netting adjustment | 20 | 21
Total | 956 | 910
SDG&E | Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 18 | 21
SDG&E | Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 319 | 312
SDG&E | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 70 | 51
SDG&E | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 287 | 275
SDG&E | Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 231 | 220
SDG&E | Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 588 | 546
SDG&E | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 20 | 21
Derivative assets, Total | 31 | 31
Liabilities, Fair Value Disclosure [Abstract] |  |
Netting adjustment | (18) | (19)
Derivative liabilities | 1 | 1
SDG&E | Level 1 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 375 | 361
Total | 379 | 361
SDG&E | Level 1 | Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 15 | 19
SDG&E | Level 1 | Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 315 | 308
SDG&E | Level 1 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 45 | 34
SDG&E | Level 1 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 1 | Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 1 | Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 45 | 34
SDG&E | Level 1 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 4 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 18 | 20
SDG&E | Level 2 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 550 | 518
Total | 551 | 518
SDG&E | Level 2 | Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 3 | 2
SDG&E | Level 2 | Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 4 | 4
SDG&E | Level 2 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 25 | 17
SDG&E | Level 2 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 287 | 275
SDG&E | Level 2 | Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 231 | 220
SDG&E | Level 2 | Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 543 | 512
SDG&E | Level 2 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 1 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 1 | 0
SDG&E | Level 3 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
Total | 6 | 10
SDG&E | Level 3 | Short-term investments, primarily cash equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 3 | Equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 3 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 3 | Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 3 | Other securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 3 | Total debt securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total nuclear decommissioning trusts | 0 | 0
SDG&E | Level 3 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 6 | 10
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 | 0
SoCalGas | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Netting adjustment | 1 | 1
Derivative assets, Total | 2 | 2
Liabilities, Fair Value Disclosure [Abstract] |  |
Netting adjustment | (1) | 0
Derivative liabilities | 46 | 210
SoCalGas | Level 1 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 0 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 0 | 0
SoCalGas | Level 2 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 1 | 1
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | 47 | 210
SoCalGas | Level 3 | Commodity contracts subject to rate recovery |  |
Assets, Fair Value Disclosure [Abstract] |  |
Derivative asset, before netting | 0 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Derivative liability, before netting | $ 0 | $ 0

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- Definition Fair value portion of asset recognized for present right to economic benefit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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- Definition Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, and obligation to return cash collateral under master netting arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 5 -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480463/815-10-45-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -SubTopic 20 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 55 -Paragraph 8 -SubTopic 20 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-8 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-21 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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