Commitments and Contingencies - Environmental Requirements - Water and Waste (Details)	Mar. 31, 2024 USD ($) Period sites
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	$ 40,000,000
Federal Coal Ash Regulation | PSCo [Member]
Site Contingency [Line Items]
Number of sites that will excavate and process ash for beneficial use | sites	2
Federal Coal Ash Regulation | PSCo [Member] | Maximum [Member]
Site Contingency [Line Items]
Cost of Beneficial Use Coal Ash Project	$ 45,000,000