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Document and Entity Information
Sep. 01, 2023
Document And Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Sep. 01, 2023
Entity Registrant Name CENTERPOINT ENERGY INC
Entity Incorporation, State or Country Code TX
Entity File Number 1-31447
Entity Tax Identification Number 74-0694415
Entity Address, Address Line One 1111 Louisiana
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77002
City Area Code 713
Local Phone Number 207-1111
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001130310
NEW YORK STOCK EXCHANGE, INC. [Member]  
Document And Entity Information [Line Items]  
Title of 12(b) Security Common Stock, $0.01 par value
Trading Symbol CNP
Security Exchange Name NYSE
NYSE CHICAGO, INC. [Member]  
Document And Entity Information [Line Items]  
Title of 12(b) Security Common Stock, $0.01 par value
Trading Symbol CNP
Security Exchange Name CHX