Restructuring and Related Charges (Schedule of Restructuring and Related Charges by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 25, 2015	Sep. 26, 2014
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 38.2	$ 45.3	$ 68.2
Less: accelerated depreciation	(4.9)	(0.3)	(0.2)
Restructuring charges, net	33.3	45.0	68.0
Specialty Brands [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	23.3	36.5	57.0
Specialty Generics [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	3.4	4.5	9.8
Corporate
Restructuring Cost and Reserve [Line Items]
Total restructuring and related charges	$ 11.5	$ 4.3	$ 1.4