DEBT AND CREDIT FACILITIES - MATURITIES OF LONG-TERM DEBT (5 YEAR SCHEDULE) (Details)	Dec. 31, 2018 USD ($)
Schedule Of Long Term Debt Maturities [Line Items]
2019	$ 1,654,000,000
2020	1,619,000,000
2021	2,125,000,000
2022	682,000,000
2023	1,821,000,000
Thereafter	14,166,000,000
Total	22,067,000,000
San Diego Gas and Electric Company [Member]
Schedule Of Long Term Debt Maturities [Line Items]
2019	64,000,000
2020	71,000,000
2021	425,000,000
2022	62,000,000
2023	500,000,000
Thereafter	3,874,000,000
Total	4,996,000,000
Southern California Gas Company [Member]
Schedule Of Long Term Debt Maturities [Line Items]
2019	0
2020	0
2021	0
2022	0
2023	0
Thereafter	3,459,000,000
Total	3,459,000,000
Other Sempra Energy [Member]
Schedule Of Long Term Debt Maturities [Line Items]
2019	1,590,000,000
2020	1,548,000,000
2021	1,700,000,000
2022	620,000,000
2023	1,321,000,000
Thereafter	6,833,000,000
Total	$ 13,612,000,000