XML 153 R108.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Commitments and Contingencies - Fuel Clause Adjustment (Details) $ in Millions | Dec. 31, 2024 USD ($)
--- | ---
Guarantees and Product Warranties [Abstract] |
Proposed Refund - 2023 FCA | $ 22

X
- References No definition available. + Details
Name: | us-gaap_GuaranteesAndProductWarrantiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proposed Refund - 2023 FCA + References No definition available. + Details
Name: | xel_ProposedRefund2023FCA
Namespace Prefix: | xel_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant