v3.19.3
Cover Page - shares
9 Months Ended
Sep. 30, 2019
Oct. 25, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 001-5532-99  
Entity Registrant Name PORTLAND GENERAL ELECTRIC COMPANY  
Entity Incorporation, State or Country Code OR  
Entity Tax Identification Number 93-0256820  
Entity Address, Address Line One 121 SW Salmon Street  
Entity Address, City or Town Portland  
Entity Address, State or Province OR  
Entity Address, Postal Zip Code 97204  
City Area Code 503  
Local Phone Number 464-8000  
Title of 12(b) Security Common Stock, no par value  
Trading Symbol POR  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   89,372,125
Entity Central Index Key 0000784977  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31