COMMITMENTS AND CONTINGENCIES - LESSEE MATURITY OF LEASE LIABILITIES (Details)	Jun. 30, 2019 USD ($)
Operating leases
2019 (excluding first six months of 2019)	$ 39,000,000
2020	70,000,000
2021	67,000,000
2022	60,000,000
2023	51,000,000
Thereafter	481,000,000
Total undiscounted lease payments	768,000,000
Less: imputed interest	(269,000,000)
Total operating lease liabilities	499,000,000
Less: current lease liabilities	(49,000,000)
Long-term lease liabilities	450,000,000
Finance leases
2019 (excluding first six months of 2019)	98,000,000
2020	192,000,000
2021	190,000,000
2022	190,000,000
2023	190,000,000
Thereafter	2,807,000,000
Total undiscounted lease payments	3,667,000,000
Less: imputed interest	(2,387,000,000)
Total finance lease liabilities	1,280,000,000
Less: current lease liabilities	(23,000,000)
Long-term lease liabilities	1,257,000,000
Southern California Gas Company [Member]
Operating leases
2019 (excluding first six months of 2019)	12,000,000
2020	23,000,000
2021	20,000,000
2022	17,000,000
2023	13,000,000
Thereafter	32,000,000
Total undiscounted lease payments	117,000,000
Less: imputed interest	(12,000,000)
Total operating lease liabilities	105,000,000
Less: current lease liabilities	(21,000,000)
Long-term lease liabilities	84,000,000
Finance leases
2019 (excluding first six months of 2019)	3,000,000
2020	3,000,000
2021	1,000,000
2022	1,000,000
2023	1,000,000
Thereafter	2,000,000
Total undiscounted lease payments	11,000,000
Less: imputed interest	(1,000,000)
Total finance lease liabilities	10,000,000
Less: current lease liabilities	(4,000,000)
Long-term lease liabilities	6,000,000
San Diego Gas and Electric Company [Member]
Operating leases
2019 (excluding first six months of 2019)	15,000,000
2020	26,000,000
2021	26,000,000
2022	21,000,000
2023	17,000,000
Thereafter	43,000,000
Total undiscounted lease payments	148,000,000
Less: imputed interest	(18,000,000)
Total operating lease liabilities	130,000,000
Less: current lease liabilities	(22,000,000)
Long-term lease liabilities	108,000,000
Finance leases
2019 (excluding first six months of 2019)	95,000,000
2020	189,000,000
2021	189,000,000
2022	189,000,000
2023	189,000,000
Thereafter	2,805,000,000
Total undiscounted lease payments	3,656,000,000
Less: imputed interest	(2,386,000,000)
Total finance lease liabilities	1,270,000,000
Less: current lease liabilities	(19,000,000)
Long-term lease liabilities	$ 1,251,000,000