Results of Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss)/ gain from discontinued operations	$ (18.6)	$ (18.3)	$ (248.7)	$ 9.5	$ (2.8)	$ (24.3)	$ (4.5)	$ (2.5)	$ (276.1)	$ (34.1)	$ 122.7
DERMAGRAFT | Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss)/ gain from discontinued operations									276.1	(34.1)	122.7
Income tax expense (benefit)									$ 98.8	$ (18.9)	$ 211.3