v3.26.3
Cover
 3 Months Ended
Aug. 31, 2026
shares
Document Information [Line Items]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Aug. 31, 2026
Document Transition Report false
Entity File Number 1-7102
Entity Registrant Name NATIONAL RURAL UTILITIES COOPERATIVE FINANCE CORPORATION
Entity Incorporation, State or Country Code DC
Entity Tax Identification Number 52-0891669
Entity Address, Address Line One 20701 Cooperative Way,
Entity Address, City or Town Dulles,
Entity Address, State or Province VA
Entity Address, Postal Zip Code 20166
City Area Code (703)
Local Phone Number 467-1800
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 0
Entity Central Index Key 0000070502
Current Fiscal Year End Date --05-31
Document Fiscal Year Focus 2027
Document Fiscal Period Focus Q1
Amendment Flag false
7.35% Collateral Trust Bonds, due 2026  
Document Information [Line Items]  
Title of 12(b) Security 7.35% Collateral Trust Bonds, due 2026
Trading Symbol NRUC 26
Security Exchange Name NYSE
5.50% Subordinated Notes, due 2064  
Document Information [Line Items]  
Title of 12(b) Security 5.50% Subordinated Notes, due 2064
Trading Symbol NRUC
Security Exchange Name NYSE