Acquisitions and License Agreements (Schedule of Intangible Assets Acquired) (Details) - USD ($) $ in Millions	Dec. 11, 2017	Sep. 25, 2017	Aug. 31, 2016	Feb. 01, 2016	Sep. 25, 2015	Apr. 16, 2015
Ocera [Member]
Intangible Assets Acquired as Part of Business Combination [Line Items]
Net assets acquired	$ 40.5
InfaCare [Member]
Intangible Assets Acquired as Part of Business Combination [Line Items]
Net assets acquired		$ 38.1
Hemostasis Products
Intangible Assets Acquired as Part of Business Combination [Line Items]
Net assets acquired				$ 173.5
Therakos
Intangible Assets Acquired as Part of Business Combination [Line Items]
Net assets acquired					$ 1,019.1
Ikaria
Intangible Assets Acquired as Part of Business Combination [Line Items]
Net assets acquired						$ 1,253.6
Ikaria | Completed Technology
Intangible Assets Acquired as Part of Business Combination [Line Items]
Intangible assets acquired, weighted-average useful life						15 years
Indefinite lived intangible assets acquired						$ 1,820.0
Cash flow discount rate						14.50%
Ikaria | Trademarks
Intangible Assets Acquired as Part of Business Combination [Line Items]
Intangible assets acquired, weighted-average useful life						22 years
Indefinite lived intangible assets acquired						$ 70.0
Cash flow discount rate						14.50%
Stratatech [Member]
Intangible Assets Acquired as Part of Business Combination [Line Items]
Net assets acquired			$ 76.0
MNK-6105 [Member] | Ocera [Member]
Intangible Assets Acquired as Part of Business Combination [Line Items]
Indefinite lived intangible assets acquired	$ 64.5
Cash flow discount rate	15.50%
Stannsoporfin [Member] | InfaCare [Member]
Intangible Assets Acquired as Part of Business Combination [Line Items]
Indefinite lived intangible assets acquired		$ 113.5
Cash flow discount rate		13.50%
StrataGraft [Member] | Stratatech [Member] | In-process research and development
Intangible Assets Acquired as Part of Business Combination [Line Items]
Indefinite lived intangible assets acquired			$ 99.8
Cash flow discount rate			16.50%
Raplixa [Member] | Hemostasis Products
Intangible Assets Acquired as Part of Business Combination [Line Items]
Intangible assets acquired, weighted-average useful life				15 years
Indefinite lived intangible assets acquired				$ 73.0
Cash flow discount rate				17.00%
Therakos | Therakos
Intangible Assets Acquired as Part of Business Combination [Line Items]
Intangible assets acquired, weighted-average useful life					15 years
Indefinite lived intangible assets acquired					$ 1,170.0
Cash flow discount rate					17.00%
Terlipressin [Member] | Ikaria
Intangible Assets Acquired as Part of Business Combination [Line Items]
Indefinite lived intangible assets acquired						$ 81.0
Cash flow discount rate						17.00%
Recothrom [Member] | Hemostasis Products
Intangible Assets Acquired as Part of Business Combination [Line Items]
Intangible assets acquired, weighted-average useful life				13 years
Indefinite lived intangible assets acquired				$ 42.7
Cash flow discount rate				16.00%
PreveLeak [Member] | Hemostasis Products
Intangible Assets Acquired as Part of Business Combination [Line Items]
Intangible assets acquired, weighted-average useful life				13 years
Indefinite lived intangible assets acquired				$ 17.0
Cash flow discount rate				17.00%