Equity Securities and Indexed Debt Securities (ZENS) (CenterPoint Energy) (Tables)

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule of Gain (Loss) on Securities

Gains and losses on equity securities, net of transaction costs, are recorded in Gain (loss) on equity securities in CenterPoint Energy’s Condensed Statements of Consolidated Income. The following table presents unrealized gains (losses), net on equity securities owned by CenterPoint Energy for each period presented:

	Three Months Ended March 31,
	2024		2023
	(in millions)
AT&T Common	$	9	$	9
Charter Common	(85)		16
WBD Common	(7)		14
Other	—		(1)
Total gains (losses) on equity securities, net	$	(83)	$	38

Schedule of Debt Securities, Trading, and Equity Securities, FV-NI

CenterPoint Energy and its subsidiaries hold shares of certain securities detailed in the table below, which are classified as trading securities. Shares of AT&T Common, Charter Common and WBD Common are expected to be held to facilitate CenterPoint Energy’s ability to meet its obligation under the ZENS. The following table presents information on CenterPoint Energy’s equity securities for each period presented:

	Shares Held		Carrying Value
	March 31, 2024	December 31, 2023	March 31, 2024		December 31, 2023
			(in millions)
AT&T Common	10,212,945	10,212,945	$	180	$	171
Charter Common	872,503	872,503	254		339
WBD Common	2,470,685	2,470,685	21		28
Other			3		3
Total			$	458	$	541

Schedule of Indexed Debt Securities and Marketable Securities

CenterPoint Energy’s reference shares for each ZENS consisted of the following:

	March 31, 2024	December 31, 2023
	(in shares)
AT&T Common	0.7185	0.7185
Charter Common	0.061382	0.061382
WBD Common	0.173817	0.173817