Discontinued Operations and Divestitures, Significant Cash and Non-Cash Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 25, 2015	Sep. 26, 2014
Contrast Media and Delivery Systems
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation	$ 0.0	$ 15.5	$ 18.9
Amortization	0.0	2.3	7.5
Capital expenditures	1.6	9.5	12.3
Non-cash impairment charges	0.0	0.0	204.0
Nuclear Imaging
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation	20.9	13.1	17.9
Amortization	9.7	7.6	8.1
Capital expenditures	0.0	0.0	124.5
Non-cash impairment charges	$ 0.0	$ 0.0	$ 124.5