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

Amount of annual straight-line revenue to be recognized.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Cash received for rents during the current period.

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