v3.25.3
Cover Page - shares
9 Months Ended
Sep. 30, 2025
Oct. 31, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2025  
Document Transition Report false  
Entity File Number 000-51395  
Entity Registrant Name FEDERAL HOME LOAN BANK OF PITTSBURGH  
Entity Tax Identification Number 25-6001324  
Entity Address, Address Line One 301 Grant Street, Suite 2000  
Entity Address, City or Town Pittsburgh  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 15219  
City Area Code 412  
Local Phone Number 288-3400  
Entity Central Index Key 0001330399  
Current Fiscal Year End Date --12-31  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Current Reporting Status Yes  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   23,340,122
Entity Home Country ISO Code X1