Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 1

No definition available.

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- Definition

Carrying amount of an asset that is legally restricted for purposes of settling an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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- Definition

Amount of asset retirement obligations incurred during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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- Definition

Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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- Definition

Amount of a decommissioning liability associated with a legal obligation that a firm incurs when it constructs or operates an asset that must eventually be withdrawn from active service. This may include operating assets such as nuclear power plants or shipping vessels.

+ References

No definition available.

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

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PROPERTY, PLANT, AND EQUIPMENT - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
ARO liabilities			$ 612.4	$ 38.9
Revision of estimate			(69.6)	63.0
INDIANA MICHIGAN POWER COMPANY
Property, Plant and Equipment [Line Items]
ARO liabilities			85.7	4.8
Revision of estimate			(175.9)	2.0
Settlement of decommissioning liabilities	$ 4,030.0		4,030.0	3,510.0
Cook Nuclear Plant \| INDIANA MICHIGAN POWER COMPANY
Property, Plant and Equipment [Line Items]
Revision of reclamation costs	176.0
ARO decommissioning liability	$ 1,970.0		$ 1,970.0	$ 2,110.0
CCR Rule Revision
Property, Plant and Equipment [Line Items]
ARO liabilities		$ 602.0
Revision of estimate		$ 72.0