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Document and Entity Information
Nov. 17, 2023
Cover [Abstract]  
Document Type 8-K
Document Period End Date Nov. 17, 2023
Entity Registrant Name CENTERPOINT ENERGY INC
Entity Incorporation State Country Code TX
Entity File Number 1-31447
Entity Tax Identification Number 74-0694415
Entity Address Address Line 1 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
Security 12b Title Common Stock, $0.01 par value
Trading Symbol CNP
Security Exchange Name NYSE
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001130310