Acquisitions and License Agreements (Schedule of Financial Results and Acquisition Costs of Acquirees) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 24, 2016	Mar. 25, 2016	Dec. 25, 2015	Sep. 25, 2015	Jun. 26, 2015	Mar. 27, 2015	Dec. 26, 2014	Sep. 30, 2016	Sep. 25, 2015	Sep. 26, 2014
Operating Income [Abstract]
Operating income									$ 617.3	$ 353.8	$ 43.4
Net Sales [Abstract]
Net sales	$ 887.2	$ 866.6	$ 815.8	$ 811.2	$ 778.8	$ 768.5	$ 709.5	$ 666.3	3,380.8	2,923.1	1,650.3
Stratatech [Member]
Net Sales [Abstract]
Acquisition Related Costs									3.7	0.0	0.0
Ikaria
Operating Income [Abstract]
Operating income									201.1	47.1	0.0
Net Sales [Abstract]
Net sales									491.5	191.9	0.0
Acquisition Related Costs									0.2	30.9	0.0
Questcor Pharmaceuticals, Inc.
Operating Income [Abstract]
Operating income									371.5	223.3	17.4
Net Sales [Abstract]
Net sales									1,218.4	1,125.9	129.2
Acquisition Related Costs									0.0	0.0	47.5
Cadence Pharmaceuticals, Inc.
Operating Income [Abstract]
Operating income									(84.5)	(97.3)	(66.9)
Net Sales [Abstract]
Net sales									284.3	263.0	124.4
Acquisition Related Costs									0.0	0.0	17.6
Therakos
Operating Income [Abstract]
Operating income									12.5	0.0	0.0
Net Sales [Abstract]
Net sales									207.6	0.0	0.0
Acquisition Related Costs									0.3	22.5	0.0
Hemostasis Products
Net Sales [Abstract]
Acquisition Related Costs									2.7	0.0	0.0
Total Acquisitions
Operating Income [Abstract]
Operating income									500.6	173.1	(49.5)
Net Sales [Abstract]
Net sales									2,201.8	1,580.8	253.6
Acquisition Related Costs									$ 6.9	$ 53.4	$ 65.1