Income Taxes (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 24, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 24, 2016 USD ($)	Dec. 30, 2016 USD ($)
Income Taxes [Line Items]
Deferred tax benefit, intangible assets			$ (187.4)
Deferred tax expense, Utilization of Tax Attributes			27.2
Income tax benefit	$ (40.1)	$ (98.1)	$ (79.6)	$ (161.9)
Increase (Decrease) Tax Expense (Benefit), Change in Operating Income, Percentage Point	(8.5)		(15.3)
Other increase, percentage point			32.2
Increase (Decrease) Tax Expense (Benefit) Due to Foreign Tax Credit, Percentage Point	34.9		24.2
Loss (income) from continuing operations before income taxes	$ 30.5	$ 78.6	$ 19.9	$ 113.3
Effective tax rate	(131.50%)	(124.80%)	(400.00%)	(142.90%)
Current Income Tax Expense (Benefit)	$ 44.7	$ 1.8	$ 80.6	$ 48.0
Deferred Income Tax Expense (Benefit)	$ (84.8)	(99.9)	$ (160.2)	(209.9)
Increase (Decrease) in Effective Tax Rate, Percentage Point	(6.7)		(257.1)
Effective Income Tax Rate Reconciliation, Other Adjustments, Percentage Point	(33.1)		(274.0)
Increase (Decrease) Effective Tax Rate, Divestitures, Percentage Point			8.0
Unrecognized tax benefits	$ 119.1		$ 119.1		$ 118.7
Unrecognized tax benefits, net increase			0.4
Unrecognized tax benefits, net decreases related to prior period tax positions			(2.0)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations			(1.7)
Unrecognized tax benefits, additions related to current year tax positions			4.1
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	117.3		117.3
Interest accrued on unrecognized tax benefits	5.9		5.9		7.1
Unrecognized tax benefits that would impact effective tax rate, upper bound of change	18.2		18.2
Income tax penalties and interest accrued that would impact effective tax rate, upper bound of change	3.8		3.8
Stratatech
Income Taxes [Line Items]
Increase (Decrease), Deferred Tax Liability, Net	22.1		22.1		$ 24.3
Nuclear Imaging
Income Taxes [Line Items]
Other Tax Expense (Benefit)			1.0
Income tax (benefit) expense	(0.1)	$ 8.8	5.3	$ 19.0
Intrathecal Therapy
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Future Consideration			56.5
Increase (Decrease) Deferred Tax Asset, Net Operating Losses			(4.3)
Deferred tax benefit, intangible assets			(17.9)
Increase (Decrease) Deferred Tax Asset, Product Development	2.6
Increase (Decrease), Deferred Tax Liability, Net	$ 40.3		$ 40.3
Retained Earnings | ASU 2016-16
Income Taxes [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted			75.0
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
Other Assets | ASU 2016-16
Income Taxes [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted			67.2
Prepaid Expenses and Other Current Assets | ASU 2016-16
Income Taxes [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted			7.8