Restructuring and Related Charges (Schedule of Net Restructuring and Related Charges) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 26, 2015	Jun. 27, 2014	Jun. 26, 2015	Jun. 27, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges, net	$ 23.1	$ 24.2	$ 34.2	$ 54.0
Less: non-cash charges, including accelerated share-based compensation expense	(1.5)	(0.4)	(9.4)	(3.1)
Total charges expected to be settled in cash	21.6	23.8	24.8	50.9
2013 Mallinckrodt program
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges, net	3.7	23.0	1.7	53.9
Acquisitions
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges, net	19.7	0.0	32.8	0.0
Other
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges, net	$ (0.3)	$ 1.2	$ (0.3)	$ 0.1