Document and Entity Information In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2012	May 04, 2012
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-Q
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		93,419,368