Environmental Requirements - Water and Waste (Details) $ in Millions	Dec. 31, 2022 USD ($) Reactor
Loss Contingencies [Line Items]
Number of sites where regulated ash units will still be in operation at a specified date | Reactor	8
Federal Coal Ash Regulation [Member] | PSCo
Loss Contingencies [Line Items]
Estimated cost to remediate groundwater sampling results	$ 35
Federal Coal Ash Regulation [Member] | PSCo | Maximum
Loss Contingencies [Line Items]
Cost of Beneficial Use Coal Ash Project	45
Federal Clean Water Act Section 316 (b) | Capital Addition Purchase Commitments [Member]
Loss Contingencies [Line Items]
Liability for estimated cost to comply with regulation	$ 45