Document And Entity Information	2 Months Ended
	Feb. 29, 2012
Document And Entity Information [Abstract]
Document Type	10-QT
Amendment Flag	false
Document Period End Date	Feb. 29, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Entity Registrant Name	NGA Holdco, LLC
Entity Central Index Key	0001405621
Current Fiscal Year End Date	--02-29
Entity Filer Category	Smaller Reporting Company