OTHER CONTINGENCIES AND COMMITMENTS (Oakland Headquarters Lease) (Details) ft² in Thousands, $ in Millions	Mar. 31, 2023 USD ($) ft²	Dec. 31, 2022 USD ($)	Oct. 23, 2020 USD ($) ft²
Operating Leased Assets [Line Items]
Term of contract			34 years 11 months
Operating lease right of use asset	$ 1,448	$ 1,311
Pacific Gas & Electric Co (Utility)
Operating Leased Assets [Line Items]
Operating lease right of use asset	$ 1,448	$ 1,311
Oakland Headquarters Lease | Pacific Gas & Electric Co (Utility)
Operating Leased Assets [Line Items]
Rentable square feet | ft²	659		910
Lease, option payment letter of credit			$ 75
Lease, security letter of credit			75
Purchase options, land, value			$ 892
Operating lease right of use asset	$ 731
Leasehold improvements	265
Leasehold incentives	179
Operating lease, right-of-use liability	$ 910