OTHER CONTINGENCIES AND COMMITMENTS (Oakland Headquarters Lease) (Details) ft² in Thousands, $ in Millions	Jun. 30, 2025 USD ($)	Jul. 11, 2024 USD ($)	Jul. 11, 2023 USD ($)	Jun. 30, 2023 USD ($) 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				$ 1,418	$ 1,311
Pacific Gas & Electric Co (Utility)
Operating Leased Assets [Line Items]
Operating lease right of use asset				$ 1,418	$ 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
Operating lease right of use asset				$ 735
Leasehold improvements				262
Leasehold incentives				178
Operating lease, right-of-use liability				$ 913
Oakland Headquarters Lease | Pacific Gas & Electric Co (Utility) | Forecast
Operating Leased Assets [Line Items]
Purchase price, deposits	$ 506	$ 250
Oakland Headquarters Lease | Pacific Gas & Electric Co (Utility) | Subsequent Event
Operating Leased Assets [Line Items]
Purchase price			$ 906
Purchase price, deposits			$ 150