XML 39 R52.htm IDEA: XBRL DOCUMENT v3.2.0.727
Commitments and Contingencies - Nuclear Spent Fuel and Waste Disposal (Details) - Palo Verde Nuclear Generating Station [Member] - Public Service Company of New Mexico [Member] - USD ($)
 1 Months Ended 3 Months Ended
Oct. 07, 2014
Mar. 31, 2015
Jun. 30, 2014
Jun. 30, 2015
Dec. 31, 2014
Nuclear Spent Fuel And Waste Disposal [Member]          
Public Utilities, Commitments And Contingencies [Line Items]          
Loss Contingency, Estimate of Possible Loss       $ 58,000,000  
Revised Annual Fee, Nuclear Waste Disposal     $ 0    
Nuclear Spent Fuel And Waste Disposal [Member] | Other Deferred Credits [Member]          
Public Utilities, Commitments And Contingencies [Line Items]          
Loss Contingency Accrual       $ 12,500,000 $ 12,300,000
Nuclear Spent Fuel And Waste Disposal [Member] | Settled Litigation [Member]          
Public Utilities, Commitments And Contingencies [Line Items]          
Lawsuit settlement, third party receipt $ 57,400,000        
PNMs share of lawsuit settlement, third party receipt $ 5,900,000        
Department of energy, spent nuclear fuel removal July 2011 - June 2014 [Member]          
Public Utilities, Commitments And Contingencies [Line Items]          
Lawsuit settlement, third party receipt   $ 42,000,000      
PNMs share of third party settlement claim   4,300,000      
Litigation Settlement, Portion credited to customers   $ 3,100,000