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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2025

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on a Recurring Basis

The following tables present information about the Registrants’ assets and liabilities measured at fair value on a recurring basis as of March 31, 2025 and December 31, 2024 and indicate the fair value hierarchy of the valuation techniques utilized by the Registrants to determine such fair value.

CenterPoint Energy

			March 31, 2025																								December 31, 2024
			Level 1						Level 2						Level 3												Total						Level 1						Level 2						Level 3									Total
Assets			(in millions)
Equity securities			$	640					$	—					$	—											$	640					$	561					$	—					$	—								$	561
Investments, including money market funds (1)			21						—						—												21						22						—						—									22
Interest rate derivatives (1)			—						1						—												1						—						—						—									—
Natural gas derivatives (1)			—						10						—												10						—						1						—									1
Total assets			$	661					$	11					$	—											$	672					$	583					$	1					$	—								$	584
Liabilities
Indexed debt securities derivative			$	—					$	698					$	—											$	698					$	—					$	619					$	—								$	619
Natural gas derivatives (2)			—						—						—												—						—						3						—									3
Total liabilities			$	—					$	698					$	—											$	698					$	—					$	622					$	—								$	622

Houston Electric

			March 31, 2025																								December 31, 2024
			Level 1						Level 2						Level 3												Total						Level 1						Level 2						Level 3												Total
Assets			(in millions)
Investments, including money market funds (1)			$	4					$	—					$	—											$	4					$	5					$	—					$	—											$	5
Interest rate derivatives (1)			—						1						—												1						—						—						—												—
Total assets			$	4					$	1					$	—											$	5					$	5					$	—					$	—											$	5

CERC

			March 31, 2025																								December 31, 2024
			Level 1						Level 2						Level 3												Total						Level 1						Level 2						Level 3									Total
Assets			(in millions)
Investments, including money market funds (1)			$	16					$	—					$	—											$	16					$	15					$	—					$	—								$	15
Natural gas derivatives (1)			—						9						—												9						—						1						—									1
Total assets			$	16					$	9					$	—											$	25					$	15					$	1					$	—								$	16
Liabilities
Natural gas derivatives (2)			$	—					$	—					$	—											$	—					$	—					$	2					$	—								$	2
Total liabilities			$	—					$	—					$	—											$	—					$	—					$	2					$	—								$	2

(1)Included in Prepaid expenses and other current assets in the respective Condensed Consolidated Balance Sheets.

(2)Included in Other current liabilities in the respective Condensed Consolidated Balance Sheets.

Schedule of Estimated Fair Value of Financial Instruments, Debt Instruments

The fair values of cash and cash equivalents, investments in equity securities measured at fair value and short-term borrowings under AMAs are estimated to be approximately equivalent to carrying amounts and have been excluded from the table below. The carrying amounts of non-trading derivative assets and liabilities and CenterPoint Energy’s ZENS indexed debt securities derivative are stated at fair value and are excluded from the table below. The fair value of each debt instrument is determined by multiplying the principal amount of each debt instrument by a combination of historical trading prices and comparable issue data. These liabilities, which are not measured at fair value in the Registrants’ Condensed Consolidated Balance Sheets, but for which the fair value is disclosed, would be classified as Level 2 in the fair value hierarchy.

			March 31, 2025																		December 31, 2024
			CenterPoint Energy (1)						Houston Electric						CERC						CenterPoint Energy (1)						Houston Electric						CERC
Long-term debt, including current maturities			(in millions)
Carrying amount			$	22,185					$	9,319					$	5,068					$	20,961					$	8,822					$	5,184
Fair value			21,085						8,351						4,985						19,597						7,746						5,032

(1)Includes Securitization Bonds, as applicable.

X

- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

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No definition available.

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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