Percentage of public utility's approved equity to capital, including debt and equity.

No definition available.

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- Definition

Amount of public utility's approved rate increase (decrease) by regulatory agency.

+ References

No definition available.

+ Details

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- Definition

Percentage of public utility's approved rate increase (decrease) by regulatory agency.

+ References

No definition available.

+ Details

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- Definition

Percentage of public utility's approved return on equity.

+ References

No definition available.

+ Details

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- 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

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- Definition

Amount of public utility's interim rate increase (decrease) allowed while waiting final decision of regulatory agency.

+ References

No definition available.

+ Details

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- Definition

The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 405
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481854/980-405-25-1

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REGULATORY ENVIRONMENT - 2023 MERC RATE ORDER (Details) - USD ($) $ in Millions	1 Months Ended
	Nov. 30, 2023	Dec. 31, 2022	Mar. 31, 2024	Dec. 31, 2023
Public Utilities, General Disclosures [Line Items]
Regulatory liability for interim rate refunds			$ 3,809.4	$ 3,745.2
Minnesota Public Utilities Commission (MPUC) \| MERC
Public Utilities, General Disclosures [Line Items]
Interim rate increase		$ 37.0
Approved rate increase	$ 28.8
Approved rate increase (as a percent)	7.10%
Approved return on equity (as a percent)	9.65%
Approved common equity component average (as a percent)	53.00%
Minnesota Public Utilities Commission (MPUC) \| MERC \| Revenue Subject to Refund
Public Utilities, General Disclosures [Line Items]
Regulatory liability for interim rate refunds			$ 10.8