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Revenue (Deferred) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2021 | Dec. 31, 2021
Revenue |  |
Proceeds from Morongo Transmission LLC |  | $ 400
SCE |  |
Revenue |  |
Proceeds from Morongo Transmission LLC |  | 400
SCE | West of Devers |  |
Revenue |  |
Proceeds from Morongo Transmission LLC | $ 400 |
Annual revenue to be recognized | $ 13 |
Deferred revenue balance |  | 394
Deferred revenue current |  | 13
Deferred revenue non-current |  | 381
Revenue recognized |  | $ 6

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