XML 72 R1.htm IDEA: XBRL DOCUMENT v2.4.0.8
Document and Entity Information
 9 Months Ended
Sep. 30, 2014
Oct. 31, 2014
Entity Information [Line Items]    
Entity Registrant Name HAWAIIAN ELECTRIC INDUSTRIES INC  
Entity Central Index Key 0000354707  
Document Type 10-Q  
Document Period End Date Sep. 30, 2014  
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   102,562,464
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3  
Hawaiian Electric Company, Inc. and Subsidiaries
    
Entity Information [Line Items]    
Entity Registrant Name HAWAIIAN ELECTRIC CO INC  
Entity Central Index Key 0000046207  
Document Type 10-Q  
Document Period End Date Sep. 30, 2014  
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   15,429,105
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3