Acquisitions and License Agreements (Schedule of Intangible Asset Amortization by Acquiree) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014
Business Acquisition [Line Items]
Intangible asset amortization	$ 123.6	$ 15.5	$ 249.1	$ 24.3
Questcor Pharmaceuticals, Inc.
Business Acquisition [Line Items]
Intangible asset amortization	75.4	0	150.8	0
Cadence Pharmaceuticals, Inc.
Business Acquisition [Line Items]
Intangible asset amortization	40.7	4.8	81.3	4.8
Questcor and Cadence Pharmaceuticals
Business Acquisition [Line Items]
Intangible asset amortization	$ 116.1	$ 4.8	$ 232.1	$ 4.8