Discontinued Operations and Divestitures Discontinued Operations (Income) Loss from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 24, 2016	Jun. 30, 2017	Jun. 24, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations			$ 8.4
(Loss) income from discontinued operations, net of income taxes	$ (7.8)	$ 22.6	362.5	$ 42.4
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	104.0	31.6	206.2
Discontinued operation, costs of goods sold	0.0	51.5	15.6	99.2
Discontinued operation, selling general and administrative expense	0.0	23.5	7.8	45.4
Disposal Group, Including Discontinued Operation, Restructuring Charges, Net	0.0	0.1	0.0	0.4
Disposal Group, Including Discontinued Operation, Other Expense			(0.2)
Discontinued operation, other income	0.0	1.1		1.4
Income from discontinued operations	0.0	27.8	8.4	59.8
(Loss) gain on divestiture of discontinued operations	(5.9)	0.0	363.4	0.0
(Loss) income from discontinued operations, before income taxes	(5.9)	27.8	371.8	59.8
Income tax (benefit) expense	(0.1)	8.8	5.3	19.0
(Loss) income from discontinued operations, net of income taxes	$ (5.8)	19.0	$ 366.5	40.8
Contrast Media and Delivery Systems
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operations, Net Sales		0.7		1.8
(Loss) gain on divestiture of discontinued operations		1.7
Income tax (benefit) expense		$ 0.0		(0.2)
(Loss) income from discontinued operations, net of income taxes				$ 0.0