XML 74 R63.htm IDEA: XBRL DOCUMENT v3.25.3

Commitments and Contingencies - Cabin Creek (Details) - USD ($) $ in Millions	Apr. 18, 2025	Dec. 31, 2023	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Cabin Creek estimated costs			$ 88
Cabin Creek actual costs		$ 110
Return Reduction	$ 8

X

- References

No definition available.

+ Details

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

X

- Definition

Cabin Creek actual costs

+ References

No definition available.

+ Details

Name:	xel_CabinCreekActualCosts
Namespace Prefix:	xel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Cabin Creek estimated costs

+ References

No definition available.

+ Details

Name:	xel_CabinCreekEstimatedCosts
Namespace Prefix:	xel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Return Reduction

+ References

No definition available.

+ Details

Name:	xel_ReturnReduction
Namespace Prefix:	xel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant