v3.6.0.2
Document And Entity Information - USD ($)
12 Months Ended
Dec. 31, 2016
Jan. 31, 2017
Jun. 30, 2016
Document and Entity Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Trading Symbol EE    
Entity Registrant Name EL PASO ELECTRIC CO /TX/    
Entity Central Index Key 0000031978    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   40,557,679  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 1,883,999,218