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Disposal Group, Including Discontinued Operation, Maximum Transition Term

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Disposal Group Including Discontinued Operations, Number of Customers

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Disposal Group Including Discontinued Operations, Purchase Price of Natural Gas

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Disposal Group, Not Discontinued Operation, Receivable

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Disposal Group, Not Discontinued Operations, Transaction Costs

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One-time Setup Costs, Receivable On Reimbursement

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Transition Services Agreement, Accounts Receivable

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Transition Services Agreement, Charges

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- Definition

Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Acquisition and Divestiture (CenterPoint Energy and CERC) - Narrative (Details) mi in Thousands, customer in Thousands, $ in Millions			3 Months Ended		6 Months Ended
	Mar. 31, 2025 USD ($) customer mi	Mar. 07, 2025 USD ($) MW	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Feb. 19, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale			$ 0.0	$ 0.0	$ (43.0)	$ 0.0
Goodwill			3,943.0		3,943.0		$ 3,943.0
Maximum transition term	24 months
Termination period	60 days
Reimbursement of transition services			8.5		8.5
Transition services receivables			8.5		8.5
Receivable from buyers for reimbursement					7.5
Posey Solar \| Alternative Energy
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Power generation capacity, megawatts \| MW		191
Consideration transferred		$ 357.0
Lease liabilities incurred		$ 35.0
Posey Solar \| Alternative Energy \| SIGECO
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of posey solar assets acquired		1
CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale			0.0	$ 0.0	52.0	$ 0.0
Goodwill			$ 1,461.0		1,461.0		$ 1,461.0
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| CenterPoint Energy and CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivable for working capital and other customary adjustments					12.0
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Louisiana and Mississippi Regulated Natural Gas LDC Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill	$ 217.0
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Louisiana and Mississippi Regulated Natural Gas LDC Businesses \| CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price								$ 1,200.0
Miles of pipeline (in miles) \| mi	12
Number of customers (more than) \| customer	380
Goodwill	$ 122.0
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations \| Louisiana and Mississippi Regulated Natural Gas LDC Businesses \| CenterPoint Energy and CERC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transaction costs					$ 21.0