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State Audits (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Xcel Energy [Member]
Income Tax [Line Items]
Potential Tax Adjustments	$ 0

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxExaminationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	xel_PotentialTaxAdjustments
Namespace Prefix:	xel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=xel_XcelEnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: