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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2024

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment includes the following:

									December 31, 2024																		December 31, 2023
			Weighted Average Useful Lives						Property, Plant and Equipment, Gross						Accumulated Depreciation & Amortization						Property, Plant and Equipment, Net						Property, Plant and Equipment, Gross						Accumulated Depreciation & Amortization						Property, Plant and Equipment, Net
			(in years)						(in millions)
CenterPoint Energy
Electric transmission and distribution			37						$	21,387					$	4,810					$	16,577					$	19,151					$	4,762					$	14,389
Electric generation (1)			25						1,107						154						953						1,381						315						1,066
Natural gas distribution			32						16,399						4,326						12,073						16,492						4,337						12,155
Finance ROU asset (2)			7.5						662						232						430						662						136						526
Other property			22						3,112						1,056						2,056						2,710						993						1,717
Total									$	42,667					$	10,578					$	32,089					$	40,396					$	10,543					$	29,853

									December 31, 2024																		December 31, 2023
			Weighted Average Useful Lives						Property, Plant and Equipment, Gross						Accumulated Depreciation & Amortization						Property, Plant and Equipment, Net						Property, Plant and Equipment, Gross						Accumulated Depreciation & Amortization						Property, Plant and Equipment, Net
			(in years)						(in millions)
Houston Electric
Electric transmission and distribution			37						$	18,645					$	3,647					$	14,998					$	16,800					$	3,641					$	13,159
Finance ROU asset (2)			7.5						662						232						430						662						136						526
Other property			20						2,443						749						1,694						2,053						692						1,361
Total									$	21,750					$	4,628					$	17,122					$	19,515					$	4,469					$	15,046
CERC
Natural gas distribution			32						$	15,474					$	4,118					$	11,356					$	15,591					$	4,136					$	11,455
Other property			11						78						28						50						81						33						48
Total									$	15,552					$	4,146					$	11,406					$	15,672					$	4,169					$	11,503

(1)SIGECO and AGC owned a 300 MW unit at the Warrick Power Plant (Warrick Unit 4) as tenants in common as of December 31, 2023. SIGECO’s share of the cost of this unit as of December 31, 2023, was $198 million with accumulated depreciation totaling $171 million. Under the operating agreement, AGC and SIGECO shared equally in the cost of operation and output of the unit. SIGECO’s share of operating costs was included in Operation and maintenance expense in CenterPoint Energy’s Statements of Consolidated Income. SIGECO exited joint operations of Warrick Unit 4 on January 1, 2024.

(2)Houston Electric recognized a finance ROU asset as of December 31, 2024 and December 31, 2023 related to temporary generation. See Note 19 for further discussion.

Schedule of Depreciation and Amortization

The following table presents depreciation and amortization expense for 2024, 2023 and 2022:

			Year Ended December 31,
			2024																		2023																		2022
			CenterPoint Energy						Houston Electric						CERC						CenterPoint Energy						Houston Electric						CERC						CenterPoint Energy						Houston Electric						CERC
			(in millions)
Depreciation			$	1,177					$	545					$	492					$	1,092					$	484					$	459					$	1,013					$	434					$	420
Amortization of securitized regulatory assets			90						74						—						163						155						—						191						191						—
Other amortization			172						143						30						146						109						34						84						45						28
Total			$	1,439					$	762					$	522					$	1,401					$	748					$	493					$	1,288					$	670					$	448

Schedule of Asset Retirement Obligation

A reconciliation of the changes in the ARO liability recorded in Other non-current liabilities on each of the Registrants’ respective Consolidated Balance Sheets is as follows:

			December 31, 2024																		December 31, 2023
			CenterPoint Energy						Houston Electric						CERC						CenterPoint Energy						Houston Electric						CERC
			(in millions)
Beginning balance			$	590					$	40					$	380					$	610					$	36					$	420
Additions			11						—						—						—						—						—
Accretion expense (1)			21						1						16						23						1						16
Revisions in estimates (2)			(34)						(2)						(33)						(43)						3						(56)
Ending balance			$	588					$	39					$	363					$	590					$	40					$	380

(1)Reflected in Regulatory assets on each of the Registrants’ respective Consolidated Balance Sheets.

(2)In 2024 and 2023, CenterPoint Energy and CERC reflected a decrease in their respective ARO liability, which was primarily attributable to increases in the long-term interest rates used for discounting in the ARO calculation. In 2024, Houston Electric reflected a decrease in its ARO liability attributable to an increase in discount rates, while in 2023, Houston Electric reflected an increase in its ARO liability attributable to an increase in discount rates and disposal costs.

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Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

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Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

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