Restructuring and Related Charges (Schedule of Net Restructuring and Related Charges) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
Restructuring Cost and Reserve
Restructuring and related charges, net	$ 15.5	$ 8.7	$ 35.7	$ 34.0
Less: accelerated depreciation	(1.2)	(1.9)	(3.6)	(4.8)
Total charges expected to be settled in cash	14.3	6.8	32.1	29.2
Restructuring Fiscal 2016 Plan
Restructuring Cost and Reserve
Restructuring and related charges, net	15.5	8.3	35.7	8.3
2013 Mallinckrodt program
Restructuring Cost and Reserve
Restructuring and related charges, net	0.0	0.3	0.0	22.7
Acquisitions
Restructuring Cost and Reserve
Restructuring and related charges, net	$ 0.0	$ 0.1	$ 0.0	$ 3.0