Discontinued Operations and Divestitures, Significant Cash and Non-Cash Transactions (Details) - Contrast Media and Delivery Systems - USD ($) $ in Millions	12 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation	$ 15.5	$ 18.9	$ 16.0
Amortization	2.3	7.5	7.5
Capital expenditures	9.5	12.3	17.4
Non-cash impairment charges	$ 0.0	$ 204.0	$ 0.0