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Cover
Sep. 18, 2025
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Entity Central Index Key 0001130310
Document Period End Date Sep. 18, 2025
Entity Incorporation, State or Country Code TX
Entity File Number 1-31447
Entity Registrant Name CenterPoint Energy, Inc.
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
Common Stock [Member] | New York Stock Exchange [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol CNP
Security Exchange Name NYSE
CenterPoint Energy Houston Electric, LLC [Member]  
Document Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0000048732
Entity Incorporation, State or Country Code TX
Entity File Number 1-3187
Entity Registrant Name CenterPoint Energy Houston Electric, LLC
Entity Tax Identification Number 22-3865106
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
CenterPoint Energy Houston Electric, LLC [Member] | 6.95% General Mortgage Bonds due 2033 [Member] | New York Stock Exchange [Member]  
Document Information [Line Items]  
Title of 12(b) Security 6.95% General Mortgage Bonds due 2033
No Trading Symbol Flag true
Security Exchange Name NYSE