Document and Entity Information	3 Months Ended
	Sep. 30, 2012	Oct. 17, 2012 Common Stock [Member]	Oct. 17, 2012 Class A Common Stock [Member]	Oct. 17, 2012 Class B Common Stock [Member]
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	MOLX
Entity Registrant Name	MOLEX INC
Entity Central Index Key	0000067472
Current Fiscal Year End Date	--06-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		95,560,076	81,477,394	94,255