0001108426 2020-03-30 2020-03-30 0001108426 pnm:PublicServiceCompanyOfNewMexicoMember 2020-03-30 2020-03-30 0001108426 pnm:TexasNewMexicoPowerCompanyMember 2020-03-30 2020-03-30 PUBLIC SERVICE CO OF NEW MEXICO 0001108426 false 8-K 2020-03-30 PNM Resources, Inc. NM 414 Silver Ave. SW Albuquerque NM 87102-3289 505 241-2700 001-32462 85-0468296 414 Silver Ave. SW Albuquerque NM 87102-3289 505 241-2700 001-06986 85-0019030 Texas-New Mexico Power Company 577 N. Garden Ridge Blvd. Lewisville TX 75067 972 420-4189 002-97230 75-0204070 false false false false Common Stock, no par value PNM NYSE false