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DERIVATIVE FINANCIAL INSTRUMENTS - CONTINGENT FEATURES (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Aggregate fair value of net liability position $ 88 $ 16 $ 21
Aggregate fair value of additional collateral 88    
SoCalGas      
Derivative Instruments, Gain (Loss) [Line Items]      
Aggregate fair value of net liability position 36 $ 6 $ 4
Aggregate fair value of additional collateral $ 36