Document and Entity Information (USD $)	12 Months Ended
	May 31, 2014
Document and Entity Information
Entity Registrant Name	NATIONAL RURAL UTILITIES COOPERATIVE FINANCE CORP /DC/
Entity Central Index Key	0000070502
Document Type	10-K
Document Period End Date	May 31, 2014
Amendment Flag	false
Current Fiscal Year End Date	--05-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Public Float	$ 0
Entity Common Stock, Shares Outstanding	0
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY