State Audits	12 Months Ended
Dec. 31, 2021 USD ($)
Income Tax Disclosure [Abstract]
Potential Tax Adjustments	$ 0

The potential income tax expense that could become payable in the event of a successful challenge by a taxing authority of an entity's income tax position.

No definition available.

Name:	psco_PotentialTaxAdjustments
Namespace Prefix:	psco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration