OTHER CONTINGENCIES AND COMMITMENTS (Schedule of Environmental Remediation Liability Composed) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Topock natural gas compressor station	$ 382	$ 369
Hinkley natural gas compressor station	143	146
Former manufactured gas plant sites owned by the Utility or third parties	586	520
Utility-owned generation facilities (other than fossil fuel-fired), other facilities, and third-party disposal sites	115	111
Fossil fuel-fired generation facilities and sites	116	137
Total environmental remediation liability	$ 1,342	$ 1,283