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Commitments and Contingencies Sherco (Details) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2021	Dec. 31, 2023	Jan. 27, 2021
Public Utilities, General Disclosures [Line Items]
Customer refund of previously recovered purchased power costs	$ 17
Amount MPUC previously disallowed related to Sherco outage			$ 22
DOC recommended refund		$ 56
Recommended refund		$ 72

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- Definition

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- Definition

Amount MPUC previously disallowed related to Sherco outage

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- Definition

Customer refund of previously recovered purchased power costs

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DOC recommended refund

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XLI recommended refund

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