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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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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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Amount of increase (decrease) of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Commitments and Contingencies - Legal, Environmental and Other Matters (Details) $ in Thousands					1 Months Ended	6 Months Ended	12 Months Ended
	Jan. 08, 2025 Plaintiff	Nov. 11, 2024 Case	Sep. 30, 2024 USD ($)	Apr. 02, 2024 lawsuit	Feb. 28, 2023 lawsuit Case class	Jun. 30, 2025 USD ($) lawsuit gasManufacturingAndStorageSite Defendant individual formerAffiliate ashPond insurer Case	Dec. 31, 2024 USD ($)	Apr. 02, 2024 Plaintiff	Feb. 07, 2024 USD ($)	Feb. 02, 2024 lawsuit
Long-Term Purchase Commitment [Line Items]
Number of owned coal ash ponds \| ashPond						3
Asset retirement obligation \| $						$ 132,000
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
Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					12
Uninsured Risk
Long-Term Purchase Commitment [Line Items]
Loss contingency, number of insurers \| insurer						1
Harris County
Long-Term Purchase Commitment [Line Items]
Number of plaintiffs \| Plaintiff	140
Harris County \| Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					9
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
Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Loss contingency, number of insurers denial of indemnity coverage \| individual						2
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 2 \| 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 Personal Injury \| Pending Litigation \| CenterPoint Energy And Houston Electric Entities
Long-Term Purchase Commitment [Line Items]
Potential disallowance of recovery of costs \| $						$ 1,000
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 \| Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Loss Contingency, claims settled, number \| Case					3
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				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		3
Bellwether Cases
Long-Term Purchase Commitment [Line Items]
Number of claims dismissed						1
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 \| Harris County \| Loss from Catastrophes
Long-Term Purchase Commitment [Line Items]
Pending lawsuits					1
Other Texas Lawsuits Brought By Assignee vs. Company \| Tom Green County \| Loss from Catastrophes
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
Loss contingency, number of lawsuits progressed to state court						2
Jefferson Parish and the State of Louisiana Under the SCLRMA \| Pending Litigation \| Chevron Corporation
Long-Term Purchase Commitment [Line Items]
Potential disallowance of recovery of costs \| $						$ 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