Actual indebtedness to total capital ratio required to be maintained by most restrictive financial covenant.

No definition available.

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- Definition

Indebtedness to total capital ratio required to be maintained by most restrictive financial covenant.

+ References

No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

The cash inflow from amounts received from a long-term debt instrument secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default.

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Short-Term and Long-Term Debt - Narrative (Details) $ in Millions	Apr. 23, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Actual ratio of indebtedness to total capitalization		0.36
ALLETE Bonds 4.98% Due April 2033 \| Subsequent Event
Debt Instrument [Line Items]
Proceeds from issuance of first mortgage bond	$ 100.0
Interest rate	5.72%
Credit Agreement \| Line of Credit
Debt Instrument [Line Items]
Letters of credit outstanding		$ 19.4	$ 19.4
Line of credit draw outstanding		$ 94.0	$ 34.1
Minimum
Debt Instrument [Line Items]
Required ratio of indebtedness to total capitalization		0.65
Maximum
Debt Instrument [Line Items]
Required ratio of indebtedness to total capitalization		1.00