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Accounting and Ratemaking Project Relief, Approved Capital Costs

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Loss Contingency, Number of Insurers

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Loss Contingency, Pending Claims, Number of Lawsuits Named as Defendant

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Number Of Classes of Electric and Natural Gas Customers

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Number of Owned Coal Ash Ponds

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The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Number of claims dismissed.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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Commitments and Contingencies - Legal, Environmental and Other Matters (Details) $ in Thousands				3 Months Ended	12 Months Ended
	Jan. 08, 2025 Plaintiff	Sep. 30, 2024 USD ($)	Apr. 02, 2024 lawsuit	Mar. 31, 2025 USD ($) lawsuit individual insurer ashPond gasManufacturingAndStorageSite formerAffiliate Defendant Case	Dec. 31, 2024 USD ($)	Jan. 17, 2025 Case	Apr. 02, 2024 Plaintiff	Feb. 07, 2024 USD ($)	Feb. 02, 2024 lawsuit	Feb. 28, 2023 lawsuit class
Long-Term Purchase Commitment [Line Items]
Number of owned coal ash ponds \| ashPond				3
Asset retirement obligation \| $				$ 130,000
F.B. Culley
Long-Term Purchase Commitment [Line Items]
Number of owned coal ash ponds \| ashPond				2
A.B. Brown
Long-Term Purchase Commitment [Line Items]
Number of owned coal ash ponds \| ashPond				1
F.B. Culley East
Long-Term Purchase Commitment [Line Items]
Accounting and ratemaking project relief, approved capital costs \| $								$ 52,000
Accounting and ratemaking project relief, approved annual O & M expenses \| $								$ 133
Indiana Gas Service Territory
Long-Term Purchase Commitment [Line Items]
Environmental remediation number of sites with potential remedial responsibility \| gasManufacturingAndStorageSite				26
Environmental remediation investigation studies agreed upon number of sites \| gasManufacturingAndStorageSite				1
SIGECO
Long-Term Purchase Commitment [Line Items]
Environmental remediation number of sites with potential remedial responsibility \| gasManufacturingAndStorageSite				5
Minnesota and Indiana
Long-Term Purchase Commitment [Line Items]
Environmental remediation, number of sites sites owned or operated by bormer affiliate \| formerAffiliate				1
Harris County
Long-Term Purchase Commitment [Line Items]
Number of plaintiffs \| Plaintiff	140
CERC \| Indiana Gas Service Territory
Long-Term Purchase Commitment [Line Items]
Environmental remediation number of sites with potential remedial responsibility \| gasManufacturingAndStorageSite				26
Indiana Electric
Long-Term Purchase Commitment [Line Items]
Asset retirement obligation \| $					$ 11,000
Property, plant and equipment increase \| $					$ 11,000
Indiana Electric \| Minimum
Long-Term Purchase Commitment [Line Items]
Estimated capital expenditure to clean ash ponds \| $				$ 60,000
Indiana Electric \| Maximum
Long-Term Purchase Commitment [Line Items]
Estimated capital expenditure to clean ash ponds \| $				$ 80,000
Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits										12
Loss from Catastrophes \| Harris County
Long-Term Purchase Commitment [Line Items]
Pending lawsuits										9
Uninsured Risk
Long-Term Purchase Commitment [Line Items]
Loss contingency, number of insurers \| insurer				1
Hurricane Beryl \| Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Loss contingency, new claims filed, number				3
Hurricane Beryl Class Action 1 \| Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Loss contingency, damages sought, value \| $		$ 100,000
Hurricane Beryl Class Action 3 \| Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Loss contingency, damages sought, value \| $		100,000
Hurricane Beryl Class Action 2 \| Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Loss contingency, damages sought, value \| $		$ 100,000
Hurricane Beryl Personal Injury \| Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Restore the electric delivery facility cost \| $				$ 1,000
Claims of Negligence \| Harris County
Long-Term Purchase Commitment [Line Items]
Number of individual actions filed \| individual				2
Litigation Related to the February 2021 Winter Storm Event \| Pending Litigation
Long-Term Purchase Commitment [Line Items]
Pending lawsuits				220
February 2021 Winter Storm Event \| Pending Litigation
Long-Term Purchase Commitment [Line Items]
Pending lawsuits \| Case				220
February 2021 Winter Storm Event \| Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Loss contingency, pending claims, number of lawsuits named as defendant				155
Multi District Litigation \| February 2021 Putative Class Action
Long-Term Purchase Commitment [Line Items]
Pending lawsuits				1
Multi District Litigation \| February 2021 Putative Class Action \| Utility Holding, LLC
Long-Term Purchase Commitment [Line Items]
Pending lawsuits				1
Multi District Litigation \| Cases Transferred to the Multi District Litigation (MDL)
Long-Term Purchase Commitment [Line Items]
Pending lawsuits			3			2	3		3
Multi District Litigation \| Cases Transferred to the Multi District Litigation (MDL) \| CES
Long-Term Purchase Commitment [Line Items]
Number of claims dismissed			3
Bellwether Cases \| Pending Litigation
Long-Term Purchase Commitment [Line Items]
Pending lawsuits				5
Harris County vs. CERC - Putative \| Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits										1
Number of classes of electric and natural gas customers \| class										2
Other Texas Lawsuits Brought By Assignee vs. Company \| Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits										2
Other Texas Lawsuits Brought By Assignee vs. Company \| Loss from Catastrophes \| Harris County
Long-Term Purchase Commitment [Line Items]
Pending lawsuits										1
Other Texas Lawsuits Brought By Assignee vs. Company \| Loss from Catastrophes \| Tom Green County
Long-Term Purchase Commitment [Line Items]
Pending lawsuits										1
Jefferson Parish and the State of Louisiana Under the SCLRMA \| Pending Litigation
Long-Term Purchase Commitment [Line Items]
Pending lawsuits				42
Jefferson Parish and the State of Louisiana Under the SCLRMA \| Pending Litigation \| Chevron Corporation
Long-Term Purchase Commitment [Line Items]
Restore the electric delivery facility cost \| $				$ 744,600
Jefferson Parish and the State of Louisiana Under the SCLRMA \| Suits Remanded to Louisiana Federal Couts
Long-Term Purchase Commitment [Line Items]
Pending lawsuits				42
Jefferson Parish \| Pending Litigation \| Predecessor Company, Primary Fuels, Inc.
Long-Term Purchase Commitment [Line Items]
Loss contingency, pending claims, number of lawsuits named as defendant \| Defendant				1
Loss contingency, number of defendants				1