FAIR VALUE MEASUREMENTS - FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable, allowance for credit losses	$ 4	$ 5
Notes receivable, unamortized transaction costs	3	3
Long-term debt held for sale, unamortized discount and debt issuance costs	121
Unamortized discount and debt issuance costs	311	382
Finance lease obligations	1,305	1,315
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term note receivable	364	351
Long-term amounts due to unconsolidated affiliates held for sale	417
Long-term amounts due to unconsolidated affiliates		352
Long-term debt held for sale	6,961
Total long-term debt	29,866	32,899
Fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term note receivable	359	334
Long-term amounts due to unconsolidated affiliates held for sale	400
Long-term amounts due to unconsolidated affiliates		324
Long-term debt held for sale	6,661
Total long-term debt	28,376	30,193
Fair value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term note receivable	0	0
Long-term amounts due to unconsolidated affiliates held for sale	0
Long-term amounts due to unconsolidated affiliates		0
Long-term debt held for sale	0
Total long-term debt	0	0
Fair value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term note receivable	0	0
Long-term amounts due to unconsolidated affiliates held for sale	400
Long-term amounts due to unconsolidated affiliates		324
Long-term debt held for sale	6,661
Total long-term debt	28,376	30,193
Fair value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term note receivable	359	334
Long-term amounts due to unconsolidated affiliates held for sale	0
Long-term amounts due to unconsolidated affiliates		0
Long-term debt held for sale	0
Total long-term debt	0	0
SDG&E
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized discount and debt issuance costs	99	95
Finance lease obligations	1,181	1,205
SDG&E | Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	9,800	8,950
SDG&E | Fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	8,849	7,760
SDG&E | Fair value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	0	0
SDG&E | Fair value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	8,849	7,760
SDG&E | Fair value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	0	0
SoCalGas
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized discount and debt issuance costs	81	65
Finance lease obligations	124	110
SoCalGas | Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	8,109	7,359
SoCalGas | Fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	7,847	6,880
SoCalGas | Fair value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	0	0
SoCalGas | Fair value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	7,847	6,880
SoCalGas | Fair value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total long-term debt	$ 0	$ 0