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Revenue (Deferred) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Revenue (Deferred) (Details) - USD ($) $ in Millions	Jul. 31, 2021	Dec. 31, 2022	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		$ 381
Deferred revenue current		13
Deferred revenue non-current		368
Revenue recognized		$ 13	$ 6