Inventory (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 01, 2017
Inventory [Line Items]
Write-downs on excess, obsolete, unmarketable or other inventory	$ 76.9	$ 48.2	$ 41.9
Bioverativ
Inventory [Line Items]
Inventory				$ 116.1
Work-in-process | Bioverativ
Inventory [Line Items]
Inventory				84.5
Finished Goods | Bioverativ
Inventory [Line Items]
Inventory				$ 31.6