Goodwill and Intangible Assets Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013	Apr. 16, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset amortization	$ 550.3	$ 154.8	$ 27.9
Finite-Lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)	1,247.5
Weighted Average Cost of Capital, Rate		8.00%
Goodwill, Impaired, Accumulated Impairment Loss	119.5	$ 119.5
Goodwill	$ 3,649.4	2,401.9
Brands
Finite-Lived Intangible Assets [Line Items]
Weighted Average Cost of Capital, Rate	12.00%
Generics and API
Finite-Lived Intangible Assets [Line Items]
Weighted Average Cost of Capital, Rate	11.00%
Global Medical Imaging
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss		219.7
Global Medical Imaging | Contrast Media and Delivery Systems
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss		100.2
Ikaria
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset amortization	$ 57.1	$ 0.0
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 792.4