Document and Entity Information (USD $)	12 Months Ended
	Jun. 25, 2011	Aug. 10, 2012	Dec. 30, 2011
Entity Information [Line Items]
Entity Registrant Name	PERRIGO CO
Entity Central Index Key	0000820096
Current Fiscal Year End Date	--06-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Jun. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		93,504,825
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 8,435,657,798