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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 |  |

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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