v3.26.3
Cover
Sep. 21, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 21, 2026
Entity File Number 1-3187
Entity Registrant Name CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC
Entity Central Index Key 0000048732
Entity Tax Identification Number 22-3865106
Entity Incorporation, State or Country Code TX
Entity Address, Address Line One 1111 Louisiana Street
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
Title of 12(b) Security 6.95% General Mortgage Bonds due 2033
Trading Symbol n/a
Security Exchange Name NYSE
Entity Emerging Growth Company false