XML 47 R1.htm IDEA: XBRL DOCUMENT v3.7.0.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2017
Apr. 25, 2017
Entity Information [Line Items]    
Entity Registrant Name PINNACLE WEST CAPITAL CORP  
Entity Central Index Key 0000764622  
Document Type 10-Q  
Document Period End Date Mar. 31, 2017  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   111,560,427
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
APS    
Entity Information [Line Items]    
Entity Registrant Name ARIZONA PUBLIC SERVICE COMPANY  
Entity Central Index Key 0000007286  
Document Type 10-Q  
Document Period End Date Mar. 31, 2017  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   71,264,947
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1