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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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Revenue (Deferred) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
Revenue (Deferred) (Details) - USD ($) $ in Millions	Jul. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 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		$ 384		$ 384
Deferred revenue current		13		13
Deferred revenue non-current		371		371
Revenue recognized		$ 3	$ 2	$ 10	$ 2