Document and Entity Information (USD $)	3 Months Ended
	Sep. 28, 2012	Oct. 18, 2012	Jul. 01, 2011
Document Information [Abstract]
Document type	10-Q
Document period end date	Sep. 28, 2012
Amendment flag	false
Entity Information [Abstract]
Entity registrant name	Graco Inc.
Entity central index key	0000042888
Entity current reporting status	Yes
Entity voluntary filers	No
Current fiscal year end date	--12-28
Entity filer category	Large Accelerated Filer
Entity well known seasoned issuer	Yes
Entity common stock shares outstanding		60,673,000
Entity public float			$ 3,078,080,694
Document fiscal year focus	2012
Document fiscal period focus	Q3