Investments in Nuclear Decommissioning Trusts and Other Special Use Funds - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Arizona Public Service Company
Schedule of Equity Method Investments [Line Items]
Employee medical claims amount	$ 15	$ 15

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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