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Commitments and Contingencies Environmental Requirements - Water and Waste (Details) $ in Millions | Mar. 31, 2024 USD ($) sites Period
--- | ---
Site Contingency [Line Items] |
Number of sites under investigation as part of federal CCR program | Period | 4
Accrued liability of sites under investigation as part of federal CCR program | $ 40
Federal Coal Ash Regulation | PSCo |
Site Contingency [Line Items] |
Number of sites that will excavate and process ash for beneficial use | sites | 2
Federal Coal Ash Regulation | PSCo | Maximum [Member] |
Site Contingency [Line Items] |
Cost of Beneficial Use Coal Ash Project | $ 45
Federal Clean Water Act Section 316 (b) | Capital Addition Purchase Commitments |
Site Contingency [Line Items] |
Liability for estimated cost to comply with entrainment regulation | $ 50

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