Restructuring and Related Charges (Schedule of Restructuring Reserves by Type of Cost) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 28, 2014
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 25.5
Charges	30.8
Changes in estimate	(3.7)
Cash payments	(16.2)
Currency translation and other	(0.2)
Ending Balance	36.2
2013 Mallinckrodt program
Restructuring Reserve [Roll Forward]
Beginning Balance	14.9
Charges	30.0
Changes in estimate	(1.7)
Cash payments	(10.9)
Currency translation and other	(0.3)
Ending Balance	32.0
Other programs
Restructuring Reserve [Roll Forward]
Beginning Balance	10.6
Charges	0.8
Changes in estimate	(2.0)
Cash payments	(5.3)
Currency translation and other	0.1
Ending Balance	4.2
Consulting Costs
Restructuring Reserve [Roll Forward]
Ending Balance	$ 8.4