XML 89 R52.htm IDEA: XBRL DOCUMENT v3.3.0.814
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
May. 16, 2014
Mar. 31, 2015
Sep. 30, 2015
Mar. 31, 2015
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       12,000,000     $ 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   $ 4,300,000    
Litigation settlement, portion credited to customers         $ 3,100,000    
Department of energy, spent nuclear fuel removal July 2014 - June 2015 [Member]              
Public Utilities, Commitments And Contingencies [Line Items]              
PNMs share of third party settlement claim           $ 1,300,000  
Litigation settlement, portion credited to customers       500,000      
Anticipated claim settlement request, third party       $ 12,300,000