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Commitments and Contingencies - Minnesota 2023 FCA (Details) $ in Millions | Sep. 30, 2024 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Proposed Refund - 2023 FCA | $ 22

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

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