Document and Entity Information	3 Months Ended
	May 31, 2013	Jul. 12, 2013
Document Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 31, 2013
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Entity Registrant Name	NGA HOLDCO, LLC
Entity Central Index Key	0001405621
Current Fiscal Year End Date	--02-28
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		0