EMPLOYEE BENEFIT PLANS - PENSION AND PBOP OBLIGATIONS, NET OF PLAN ASSETS (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	$ (407)	$ (410)
SDG&E
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	(79)	(42)
SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liabilities	(231)	(277)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	8
Current liabilities	(44)	(23)
Noncurrent liabilities	(399)	(401)
Net recorded (liability) asset at December 31	(443)	(416)
Pension Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	0
Current liabilities	(2)	(2)
Noncurrent liabilities	(79)	(42)
Net recorded (liability) asset at December 31	(81)	(44)
Pension Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	0
Current liabilities	(2)	(2)
Noncurrent liabilities	(231)	(277)
Net recorded (liability) asset at December 31	(233)	(279)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	485	443
Current liabilities	(1)	(1)
Noncurrent liabilities	(8)	(9)
Net recorded (liability) asset at December 31	476	433
Other Postretirement Benefits Plan | SDG&E
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	10	13
Current liabilities	0	0
Noncurrent liabilities	0	0
Net recorded (liability) asset at December 31	10	13
Other Postretirement Benefits Plan | SoCalGas
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	469	426
Current liabilities	0	0
Noncurrent liabilities	0	0
Net recorded (liability) asset at December 31	$ 469	$ 426