Commitments and Contingencies - San Juan County Decommissioning Ordinance (Details) - San Juan Generating Station - Coal-Fired Electricity Generating Facility Demolition And Remediation Ordinance - Public Service Company of New Mexico - USD ($) $ in Millions	Nov. 09, 2021	Sep. 30, 2022
Public Utilities, Commitments And Contingencies [Line Items]
Initial funding requirement	$ 14.7
Surety bond	$ 46.0
Decrease in decommissioning obligation		$ 21.1