Income Taxes (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 25, 2016 USD ($)	Dec. 30, 2016 USD ($)
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Intangible Assets	$ 102.6
Increase (Decrease) Tax Benefit, Utilization of Tax Attributes	27.2
Income tax benefit	$ (39.5)	$ (63.8)
Increase (Decrease) Tax Expense (Benefit), Change in Operating Income, Percentage Point	(22.8)
Loss (income) from continuing operations before income taxes	$ (10.6)	$ 34.7
Effective tax rate	372.60%	(183.90%)
Current Income Tax Expense (Benefit)	$ 35.9	$ 46.2
Deferred Income Tax Expense (Benefit)	$ 75.4	110.0
Increase (Decrease) in Effective Tax Rate, Percentage Point	556.5
Effective Income Tax Rate Reconciliation, Other Adjustments, Percentage Point	562.1
Increase (Decrease) Tax Expense (Benefit) Due to Acquisitions, Percentage Point	17.2
Unrecognized tax benefits	$ 120.1		$ 118.7
Unrecognized tax benefits, net increase	1.4
Unrecognized tax benefits, net decreases related to prior period tax positions	(1.1)
Unrecognized tax benefits, additions related to current year tax positions	2.5
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	118.3
Interest accrued on unrecognized tax benefits	7.6		7.1
Unrecognized tax benefits that would impact effective tax rate, upper bound of change			12.3
Income tax penalties and interest accrued that would impact effective tax rate, upper bound of change			5.1
Stratatech
Income Taxes [Line Items]
Increase (Decrease), Deferred Tax Liability, Net	22.1		$ 24.3
Nuclear Imaging
Income Taxes [Line Items]
Income tax expense	5.4	$ 10.2
Intrathecal Therapy
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Future Consideration	56.5
Increase (Decrease) Deferred Tax Asset, Net Operating Losses	5.2
Increase (Decrease) in Deferred Tax Liability, Intangible Assets	17.9
Increase (Decrease) Deferred Tax Asset, Product Development	2.6
Increase (Decrease), Deferred Tax Liability, Net	$ 41.2
Retained Earnings | ASU 2016-09
Income Taxes [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted	2.9