Commitments and Contingencies - SPPC (Details) - SPPC $ in Millions	Jun. 30, 2024 USD ($)
Engineering, procurement and construction commitments, transmission expansion program
Long-Term Purchase Commitment [Line Items]
Purchase obligation	$ 624
Engineering, procurement and construction commitments, solar photovoltaic facility and battery storage
Long-Term Purchase Commitment [Line Items]
Purchase obligation	$ 986

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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