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

9 Months Ended

Sep. 30, 2023

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.

	Gains (Losses) on Equity Securities
	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
AT&T Common	$	(10)	$	(57)	$	(35)	$	(94)
Charter Common	63		(144)		88		(304)
WBD Common	(5)		(5)		3		28
Energy Transfer Common Units	—		—		—		95
Energy Transfer Series G Preferred Units	—		—		—		(9)
Other	1		—		—		—
Total	$	49	$	(206)	$	56	$	(284)

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.

	Shares Held		Carrying Value
	September 30, 2023	December 31, 2022	September 30, 2023		December 31, 2022
			(in millions)
AT&T Common	10,212,945	10,212,945	$	153	$	188
Charter Common	872,503	872,503	384		296
WBD Common	2,470,685	2,470,685	27		23
Other			2		3
Total			$	566	$	510

Schedule of Indexed Debt Securities and Marketable Securities

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

	September 30, 2023	December 31, 2022
	(in shares)
AT&T Common	0.7185	0.7185
Charter Common	0.061382	0.061382
WBD Common	0.173817	0.173817