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Disposition - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 14, 2016
Apr. 01, 2017
Sep. 30, 2017
Sep. 24, 2016
Sep. 26, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from divestiture of businesses     $ 1,865.0 $ 0.0 $ 0.0
Blood Screening Business | Disposed of by Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Sales price $ 1,850.0        
Proceeds from divestiture of businesses   $ 1,865.0      
Gain on disposal   $ 899.7      
Tax obligation     649.5    
Proceeds allocated to manufacture of inventory     13.1    
Disposal group, revenue     $ 44.0    
Minimum          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Transition services agreement term   2 years      
Minimum | Blood Screening Business | Disposed of by Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Transition services agreement term 2 years        
Maximum          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Transition services agreement term   3 years      
Maximum | Blood Screening Business | Disposed of by Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Transition services agreement term 3 years