XML 13 R1.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Document and Entity Information Document
 6 Months Ended
Jun. 30, 2011
Aug. 02, 2011
Document Information [Line Items]    
Entity Registrant Name PNM RESOURCES INC  
Entity Central Index Key 0001108426  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2011  
Document Fiscal Year Focus 2011  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   86,673,174
Public Service Company of New Mexico [Member]
    
Document Information [Line Items]    
Entity Registrant Name PUBLIC SERVICE CO OF NEW MEXICO  
Entity Central Index Key 0000081023  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   39,117,799
Texas-New Mexico Power Company [Member]
    
Document Information [Line Items]    
Entity Registrant Name TEXAS NEW MEXICO POWER CO  
Entity Central Index Key 0000022767  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   6,358