Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended			12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment	$ 0	$ 0		$ 0	$ 0	$ 185,000,000
Infrastructure Services Disposal Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment						82,000,000
Energy Services Disposal Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment						62,000,000
Indiana Electric Integrated
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment			$ 185,000,000
Level 2 | Infrastructure Services Disposal Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of disposal group			864,000,000
Level 2 | Energy Services Disposal Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of disposal group			402,000,000
Enable Midstream Partners | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of CenterPoint Energy’s equity method investment in Enable						$ 1,541,000,000
Equity method investment, fair value			$ 848,000,000