Restructuring and Related Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended		3 Months Ended
	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015
Restructuring Cost and Reserve [Line Items]
Non-cash facility closure charge	$ 2.6	$ 0	$ 2.6
2013 Mallinckrodt program | Minimum
Restructuring Cost and Reserve [Line Items]
2013 Mallinckrodt program expected cost range		100.0
2013 Mallinckrodt program | Maximum
Restructuring Cost and Reserve [Line Items]
2013 Mallinckrodt program expected cost range		125.0
Severance
Restructuring Cost and Reserve [Line Items]
Accelerated share-based compensation expense		$ 7.7		$ 0.9