Discontinued Operations and Divestitures Discontinued Operations (Income) Loss from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income from discontinued operations, net of income taxes	$ 10.8	$ 10.6	$ 79.5	$ 499.1
Nuclear Imaging
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operations, Net Sales		0.0		31.6
Discontinued operation, costs of goods sold		0.0		15.6
Discontinued operation, selling general and administrative expense		0.0		7.8
Discontinued operation, other income		0.0		0.2
(Loss) gain on divestiture of discontinued operations		(0.6)		362.8
(Loss) income from discontinued operations, before income taxes		(0.6)		371.2
Income tax (benefit) expense		(0.1)		5.2
(Loss) income from discontinued operations, net of income taxes		(0.5)		366.0
Specialty Generics Disposal Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operations, Net Sales	159.9	193.3	536.4	668.6
Discontinued operation, costs of goods sold	107.3	125.3	336.1	384.5
Discontinued operation, selling general and administrative expense	29.4	19.3	73.8	56.6
Disposal Group, Including Discontinued Operations, Research and Development Expense	7.6	12.6	36.8	46.3
Disposal Group, Including Discontinued Operations, Restructuring Charges	0.1	(1.1)	5.3	5.8
Non-restructuring impairment charges	2.0	0.0	2.0	0.0
Discontinued operation, other income	0.0	0.6	0.3	4.4
(Loss) income from discontinued operations, before income taxes	13.5	37.8	82.7	179.8
Income tax (benefit) expense	2.3	26.6	18.1	42.6
(Loss) income from discontinued operations, net of income taxes	$ 11.2	$ 11.2	$ 64.6	$ 137.2