FAIR VALUE MEASUREMENTS - RECURRING FAIR VALUE MEASURES (Details) - Recurring - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | $ 869 | $ 845 |
Short-term investments held in Rabbi Trust | 51 | 55 |
Support Agreement, net of related guarantee fees | 23 | 17 |
Total | 1,258 | 1,871 |
Total | 79 | 374 |
Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 24 | 11 |
Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 322 | 297 |
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 39 | 40 |
Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 266 | 270 |
Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 218 | 227 |
Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 523 | 537 |
Interest rate instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 62 | 76 |
Derivative liabilities | 2 | |
Commodity contracts not subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 19 | 273 |
Effect of netting and allocation of collateral | 143 | 451 |
Derivative liabilities | 11 | 191 |
Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 21 | 136 |
Effect of netting and allocation of collateral | 70 | 18 |
Derivative liabilities | 65 | 70 |
Effect of netting and allocation of collateral | (14) | |
Foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | 15 | 8 |
Interest rate and foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | | 105 |
Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 365 | 330 |
Short-term investments held in Rabbi Trust | 51 | 55 |
Support Agreement, net of related guarantee fees | 0 | 0 |
Total | 624 | 930 |
Total | 0 | 0 |
Level 1 | Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 22 | 10 |
Level 1 | Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 318 | 293 |
Level 1 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 25 | 27 |
Level 1 | Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 1 | Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 1 | Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 25 | 27 |
Level 1 | Interest rate instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Derivative liabilities | 0 | |
Level 1 | Commodity contracts not subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Effect of netting and allocation of collateral | 143 | 451 |
Derivative liabilities | 0 | 0 |
Level 1 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 82 |
Effect of netting and allocation of collateral | 65 | 12 |
Derivative liabilities | 14 | 0 |
Effect of netting and allocation of collateral | (14) | |
Level 1 | Foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | 0 | 0 |
Level 1 | Interest rate and foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | | 0 |
Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 504 | 515 |
Short-term investments held in Rabbi Trust | 0 | 0 |
Support Agreement, net of related guarantee fees | 0 | 0 |
Total | 586 | 883 |
Total | 79 | 374 |
Level 2 | Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 2 | 1 |
Level 2 | Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 4 | 4 |
Level 2 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 14 | 13 |
Level 2 | Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 266 | 270 |
Level 2 | Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 218 | 227 |
Level 2 | Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 498 | 510 |
Level 2 | Interest rate instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 62 | 76 |
Derivative liabilities | 2 | |
Level 2 | Commodity contracts not subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 19 | 273 |
Effect of netting and allocation of collateral | 0 | 0 |
Derivative liabilities | 11 | 191 |
Level 2 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 1 | 19 |
Effect of netting and allocation of collateral | 0 | 0 |
Derivative liabilities | 51 | 70 |
Effect of netting and allocation of collateral | 0 | |
Level 2 | Foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | 15 | 8 |
Level 2 | Interest rate and foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | | 105 |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Short-term investments held in Rabbi Trust | 0 | 0 |
Support Agreement, net of related guarantee fees | 23 | 17 |
Total | 48 | 58 |
Total | 0 | 0 |
Level 3 | Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 3 | Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 3 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 3 | Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 3 | Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 3 | Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Level 3 | Interest rate instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Derivative liabilities | 0 | |
Level 3 | Commodity contracts not subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Effect of netting and allocation of collateral | 0 | 0 |
Derivative liabilities | 0 | 0 |
Level 3 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 20 | 35 |
Effect of netting and allocation of collateral | 5 | 6 |
Derivative liabilities | 0 | 0 |
Effect of netting and allocation of collateral | 0 | |
Level 3 | Foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | 0 | 0 |
Level 3 | Interest rate and foreign exchange instruments | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative liabilities | | 0 |
San Diego Gas and Electric Company | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 869 | 845 |
Total | 958 | 982 |
Total | 5 | 1 |
San Diego Gas and Electric Company | Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 24 | 11 |
San Diego Gas and Electric Company | Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 322 | 297 |
San Diego Gas and Electric Company | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 39 | 40 |
San Diego Gas and Electric Company | Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 266 | 270 |
San Diego Gas and Electric Company | Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 218 | 227 |
San Diego Gas and Electric Company | Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 523 | 537 |
San Diego Gas and Electric Company | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 20 | 120 |
Effect of netting and allocation of collateral | 69 | 17 |
Derivative liabilities | 19 | 1 |
Effect of netting and allocation of collateral | (14) | |
San Diego Gas and Electric Company | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 365 | 330 |
Total | 429 | 423 |
Total | 0 | 0 |
San Diego Gas and Electric Company | Level 1 | Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 22 | 10 |
San Diego Gas and Electric Company | Level 1 | Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 318 | 293 |
San Diego Gas and Electric Company | Level 1 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 25 | 27 |
San Diego Gas and Electric Company | Level 1 | Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 1 | Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 1 | Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 25 | 27 |
San Diego Gas and Electric Company | Level 1 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 82 |
Effect of netting and allocation of collateral | 64 | 11 |
Derivative liabilities | 14 | 0 |
Effect of netting and allocation of collateral | (14) | |
San Diego Gas and Electric Company | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 504 | 515 |
Total | 504 | 518 |
Total | 5 | 1 |
San Diego Gas and Electric Company | Level 2 | Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 2 | 1 |
San Diego Gas and Electric Company | Level 2 | Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 4 | 4 |
San Diego Gas and Electric Company | Level 2 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 14 | 13 |
San Diego Gas and Electric Company | Level 2 | Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 266 | 270 |
San Diego Gas and Electric Company | Level 2 | Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 218 | 227 |
San Diego Gas and Electric Company | Level 2 | Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 498 | 510 |
San Diego Gas and Electric Company | Level 2 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 3 |
Effect of netting and allocation of collateral | 0 | 0 |
Derivative liabilities | 5 | 1 |
Effect of netting and allocation of collateral | 0 | |
San Diego Gas and Electric Company | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
Total | 25 | 41 |
Total | 0 | 0 |
San Diego Gas and Electric Company | Level 3 | Short-term investments, primarily cash equivalents | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 3 | Equity securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 3 | Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 3 | Municipal bonds | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 3 | Other securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 3 | Total debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total nuclear decommissioning trusts | 0 | 0 |
San Diego Gas and Electric Company | Level 3 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 20 | 35 |
Effect of netting and allocation of collateral | 5 | 6 |
Derivative liabilities | 0 | 0 |
Effect of netting and allocation of collateral | 0 | |
Southern California Gas Company | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 2 | 17 |
Total | 46 | 69 |
Southern California Gas Company | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 1 | 16 |
Effect of netting and allocation of collateral | 1 | 1 |
Derivative liabilities | 46 | 69 |
Southern California Gas Company | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 1 | 1 |
Total | 0 | 0 |
Southern California Gas Company | Level 1 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Effect of netting and allocation of collateral | 1 | 1 |
Derivative liabilities | 0 | 0 |
Southern California Gas Company | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 1 | 16 |
Total | 46 | 69 |
Southern California Gas Company | Level 2 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 1 | 16 |
Effect of netting and allocation of collateral | 0 | 0 |
Derivative liabilities | 46 | 69 |
Southern California Gas Company | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Total | 0 | 0 |
Total | 0 | 0 |
Southern California Gas Company | Level 3 | Commodity contracts subject to rate recovery | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Derivative assets | 0 | 0 |
Effect of netting and allocation of collateral | 0 | 0 |
Derivative liabilities | $ 0 | $ 0 |