Commitments and Contingencies Environmental Requirements - Water and Waste (Details) $ in Millions	Dec. 31, 2022 USD ($)
WYCO, Inc. [Member]
Loss Contingencies [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Federal Coal Ash Regulation [Domain] \| PSCo [Member]
Loss Contingencies [Line Items]
Estimated cost to remediate groundwater sampling results	$ 35
Federal Coal Ash Regulation [Domain] \| Maximum \| PSCo [Member]
Loss Contingencies [Line Items]
Cost of Beneficial Use Coal Ash Project	$ 45

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant