Document And Entity Information	9 Months Ended
	Jun. 28, 2013	Jul. 31, 2013
Document And Entity Information [Abstract]
Entity Registrant Name	Mallinckrodt plc
Entity Central Index Key	0001567892
Trading Symbol	MNK
Current Fiscal Year End Date	--09-27
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 28, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Amendment Flag	false
Ordinary Shares Outstanding		57,697,184