Document And Entity Information	9 Months Ended
	Feb. 28, 2014
Document Information [Line Items]
Entity Registrant Name	NATIONAL RURAL UTILITIES COOPERATIVE FINANCE CORP /DC/
Entity Central Index Key	0000070502
Current Fiscal Year End Date	--05-31
Entity Filer Category	Non-accelerated Filer
Trading Symbol	NRU
Entity Common Stock, Shares Outstanding	0
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Feb. 28, 2014
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2014