Document and Entity Information Document - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015
Document Information [Line Items]
Entity Registrant Name	CENTERPOINT ENERGY HOUSTON ELECTRIC LLC
Entity Central Index Key	0000048732
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-K/A
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Amendment Flag	true
Amendment Description	CenterPoint Energy Houston Electric, LLC. (CenterPoint Houston or the Company) hereby amends Items 8 and 9A of Part II and Item 15 of Part IV of its Annual Report on Form 10-K for the year ended December 31, 2015 filed on February 26, 2016 (Form 10-K), as amended by Amendment No. 1 thereto on Form 10-K/A filed on May 13, 2016 (Amendment No. 1), to reflect the restatement of the Company’s consolidated financial statements as discussed in Note 12. For purposes of this Form 10-K/A, and in accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended, each item of the Form 10-K, as amended by Amendment No. 1, that was affected by the restatement has been amended to the extent affected and restated in its entirety. No attempt has been made in this Form 10-K/A to update other disclosures as presented in the Form 10-K, as amended by Amendment No. 1, except as required to reflect the effects of the restatement. Accordingly, this Form 10-K/A should be read in conjunction with the Company’s SEC filings made subsequent to the filing of the Form 10-K, including any amendments of those filings. In addition, this Form 10-K/A includes updated certifications from the Company’s CEO and CFO as Exhibits 31.1, 31.2, 32.1 and 32.2.
Entity Common Stock, Shares Outstanding	1,000
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$ 0