Restructuring and Related Charges (Schedule of Restructuring and Related Charges by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 40.7	$ 81.9	$ 26.3
Less: accelerated depreciation	(0.3)	(0.5)	(2.6)
Restructuring charges, net	40.4	81.4	23.7
Specialty Brands [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	36.5	57.0	5.2
Specialty Generics [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	4.5	9.8	11.2
Nuclear Imaging
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	(4.6)	13.7	6.9
Corporate
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 4.3	$ 1.4	$ 3.0