Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017	Dec. 29, 2017	Mar. 16, 2018	Feb. 13, 2018
Income Taxes [Line Items]
Deferred tax benefit, intangible assets				$ (190,600,000)
Deferred tax expense, Utilization of Tax Attributes				27,200,000
Income tax benefit	$ 53,400,000	$ 53,600,000	$ 96,800,000	95,600,000
Increase (decrease) tax benefit	200,000		1,200,000
Increase (Decrease) Tax Expense (Benefit) Due to Pension Settlement			17,500,000
Increase (Decrease) Deferred Tax Liability Resulting From Tax Reform, TCJA					$ 444,800,000
Loss (income) from continuing operations before income taxes	$ 81,500,000	$ 35,200,000	$ 167,900,000	$ 122,100,000
Effective tax rate	65.50%	152.30%	57.70%	78.30%
Current Income Tax Expense (Benefit)	$ 9,500,000	$ 33,900,000.0	$ 13,100,000	$ 67,800,000
Deferred Income Tax Expense (Benefit)	(62,900,000)	(87,500,000)	(109,900,000)	(163,400,000)
Income Taxes Paid, Net			13,700,000		73,400,000
Income from discontinued operations, net of income taxes	43,700,000	44,400,000	68,700,000	488,500,000
Unrecognized tax benefits	202,900,000		202,900,000		182,500,000
Unrecognized tax benefits, net increase			20,400,000
Unrecognized tax benefits, net increase related to prior period tax positions			19,900,000
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			400,000
Unrecognized tax benefits, additions related to current year tax positions			900,000
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	190,200,000		190,200,000
Interest accrued on unrecognized tax benefits	17,800,000		17,800,000		$ 7,100,000
Unrecognized tax benefits that would impact effective tax rate, upper bound of change	39,800,000		39,800,000
Income tax penalties and interest accrued that would impact effective tax rate, upper bound of change	6,600,000		6,600,000
Increase (Decrease) Tax Expense (Benefit) Due to U.S. Tax Reform	(9,800,000)		(33,400,000)
Increase (Decrease) Foreign Tax Expense (Benefit) Due To Acquisitions	3,600,000		8,100,000
Increase (Decrease) Tax Expense (Benefit) Due to Divestiture			31,200,000
Increase (Decrease) Tax Expense (Benefit), Change in Operating Income	6,000,000		12,800,000
Sucampo [Member]
Income Taxes [Line Items]
Increase (Decrease) Deferred Tax Asset, Net Operating Losses			(28,000,000)
Increase (Decrease) Deferred Tax Assets, Tax Credits			2,700,000
Deferred tax benefit, intangible assets			(180,500,000)
Increase (Decrease) Deferred Tax Liability, Inventory Step-Up			(24,100,000)
Increase (Decrease) Deferred Tax Asset, Net			3,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other							$ 170,800,000
Specialty Generics Disposal Group
Income Taxes [Line Items]
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	(40,300,000)	(65,700,000)	(69,200,000)	(142,000,000)
Income tax expense	9,000,000	13,500,000	15,800,000	16,000,000
Income from discontinued operations, net of income taxes	31,300,000	52,200,000	53,400,000	126,000,000
Nuclear Imaging
Income Taxes [Line Items]
Other Tax Expense (Benefit)				1,000,000
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		5,900,000		(371,800,000)
Contingent Consideration Received, Cash, Discontinued Operation	6,000,000
Contingent consideration received, equity certificates	9,000,000
Income tax expense on contingent consideration received, discontinued operations	1,500,000
Income tax expense		(100,000)		5,300,000
Income from discontinued operations, net of income taxes		$ (5,800,000)		$ 366,500,000
Hemostasis Products
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Future Consideration			(1,500,000)
Increase (Decrease) Deferred Tax Asset, Net Operating Losses			(2,400,000)
Deferred tax benefit, intangible assets			4,200,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			8,100,000
Increase (Decrease) Deferred Tax Liability, Inventory Step-Up			3,000,000
Increase (Decrease), Deferred Tax Liability, Net						$ 3,000,000
Discontinued Operations [Member]
Income Taxes [Line Items]
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	$ 20,000,000		$ 20,000,000