XML 91 R45.htm IDEA: XBRL DOCUMENT v3.7.0.1
Palo Verde Sale Leaseback Variable Interest Entities - Narrative (Details)
3 Months Ended
Mar. 31, 2017
USD ($)
power_plant
Lease
Mar. 31, 2016
USD ($)
Dec. 31, 1986
Trust
Palo Verde Sale Leaseback Variable Interest Entities      
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts $ 4,873,000 $ 4,873,000  
Arizona Public Service Company      
Palo Verde Sale Leaseback Variable Interest Entities      
Number of VIE lessor trusts 3   3
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts $ 4,873,000 4,873,000  
Arizona Public Service Company | Consolidation of VIEs      
Palo Verde Sale Leaseback Variable Interest Entities      
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts 5,000,000 $ 5,000,000  
Initial loss exposure to the VIE's noncontrolling equity participants during lease extension period 291,000,000    
Maximum loss exposure to the VIE's noncontrolling equity participants during lease extension period $ 456,000,000    
Arizona Public Service Company | Consolidation of VIEs | Through 2023      
Palo Verde Sale Leaseback Variable Interest Entities      
Number of leases under which assets are retained | Lease 1    
Arizona Public Service Company | Consolidation of VIEs | Through 2033      
Palo Verde Sale Leaseback Variable Interest Entities      
Number of leases under which assets are retained | Lease 2    
Arizona Public Service Company | Consolidation of VIEs | Period 2017 through 2023      
Palo Verde Sale Leaseback Variable Interest Entities      
Annual lease payments $ 23,000,000    
Arizona Public Service Company | Consolidation of VIEs | Period 2024 through 2033      
Palo Verde Sale Leaseback Variable Interest Entities      
Annual lease payments $ 16,000,000    
Arizona Public Service Company | Consolidation of VIEs | Period 2024 through 2033 | Maximum      
Palo Verde Sale Leaseback Variable Interest Entities      
Lease period (up to) 2 years