v3.26.1
Cover Page
shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
shares
Document Information [Line Items]  
Document Type 10-K
Document Annual Report true
Document Transition Report false
Entity Public Float | $ $ 0
Entity Common Stock, Shares Outstanding | shares 0
Document Period End Date Dec. 31, 2025
Current Fiscal Year End Date --12-31
Auditor Firm ID 185
Auditor Name KPMG, LLP
Auditor Location Albuquerque, New Mexico
Entity Registrant Name PNM Energy Transition Bond Company I, LLC
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 414 Silver Ave. SW
Entity Address, City or Town Albuquerque
Entity Address, State or Province NM
Entity Address, Postal Zip Code 87102
City Area Code 505
Local Phone Number 241-2700
Entity File Number 333-274433-01
Entity Tax Identification Number 95-3095291
Title of 12(b) Security None
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag false
Document Financial Statement Error Correction Flag false
Entity Shell Company false
Documents Incorporated by Reference
None.
Entity Central Index Key 0001992267
Document Fiscal Year Focus 2025
Document Fiscal Period Focus FY
Amendment Flag false
Auditor [Line Items]  
Auditor Name KPMG, LLP
Auditor Firm ID 185
Auditor Location Albuquerque, New Mexico
Public Service Company of New Mexico [Member]  
Document Information [Line Items]  
Entity Registrant Name Public Service Company of New Mexico
Entity Address, Address Line One 414 Silver Ave. SW
Entity Address, City or Town Albuquerque
Entity Address, State or Province NM
Entity Address, Postal Zip Code 87102
City Area Code 505
Local Phone Number 241-2700
Entity File Number 001-06986
Entity Tax Identification Number 85-0019030