INCOME TAXES - NET OPERATING LOSSES AND TAX CREDIT CARRYFORWARDS (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating Loss Carryforwards [Line Items]
Valuation allowances	$ 189	$ 192
U.S. federal
Operating Loss Carryforwards [Line Items]
NOLs	3,416
Valuation allowances	108	115
U.S. federal | SoCalGas
Operating Loss Carryforwards [Line Items]
NOLs	2,909
U.S. federal | SDG&E
Operating Loss Carryforwards [Line Items]
NOLs	365
U.S. federal | General business tax credits
Operating Loss Carryforwards [Line Items]
Tax credits	318
U.S. federal | General business tax credits | SoCalGas
Operating Loss Carryforwards [Line Items]
Tax credits	4
U.S. federal | Corporate alternative minimum tax credits
Operating Loss Carryforwards [Line Items]
Tax credits	389
U.S. federal | Foreign tax credits
Operating Loss Carryforwards [Line Items]
Tax credits	766
U.S. state
Operating Loss Carryforwards [Line Items]
NOLs	6,043
Valuation allowances	51	51
U.S. state | SoCalGas
Operating Loss Carryforwards [Line Items]
NOLs	3,991
U.S. state | SDG&E
Operating Loss Carryforwards [Line Items]
NOLs	989
U.S. state | General business tax credits
Operating Loss Carryforwards [Line Items]
Tax credits	27
Non-U.S.
Operating Loss Carryforwards [Line Items]
NOLs	119
Valuation allowances	$ 30	$ 26