COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
SoCalGas [Member] | Natural Gas Minimum Purchase Obligation Contracts [Member]
Loss Contingencies [Line Items]
Increase in contractual commitments	$ 51
Change in 2020	16
Change in 2021	35
SoCalGas [Member] | Natural Gas Interstate Pipeline Capacity Agreements [Member]
Loss Contingencies [Line Items]
Increase in contractual commitments	625
Change in 2020	(61)
Change in 2021	17
Change in 2022	88
Change in 2023	100
Change in 2024	90
Change thereafter	391
Sempra LNG [Member] | Natural Gas Storage and Transportation Contracts [Member]
Loss Contingencies [Line Items]
Increase in contractual commitments	535
Change in 2020	(32)
Change in 2021	38
Change in 2022	34
Change in 2023	31
Change in 2024	28
Change thereafter	436
Sempra LNG [Member] | Liquefied Natural Gas Contracts [Member]
Loss Contingencies [Line Items]
Change in 2020	(194)
Change in 2021	(11)
Change in 2022	(37)
Change in 2023	(48)
Change in 2024	(52)
Change thereafter	$ (234)