v3.26.1
Cover
Jun. 15, 2026
Document Information [Line Items]  
Entity Address, State or Province VA
7.35% Collateral Trust Bonds, due 2026  
Document Information [Line Items]  
Trading Symbol NRUC 26
Title of 12(b) Security 7.35% Collateral Trust Bonds, due 2026
Security Exchange Name NYSE
5.50% Subordinated Notes, due 2064  
Document Information [Line Items]  
Trading Symbol NRUC
Title of 12(b) Security 5.50% Subordinated Notes, due 2064
Security Exchange Name NYSE