Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 30, 2018	Mar. 31, 2017	Dec. 29, 2017	Mar. 16, 2018	Feb. 13, 2018
Income Taxes [Line Items]
Deferred tax benefit, intangible assets		$ 103.1
Deferred tax expense, Utilization of Tax Attributes		27.2
Income tax benefit	$ 43.4	42.0
Increase (Decrease) Tax Expense (Benefit) Due to Pension Settlement		12.2
Increase (Decrease) Deferred Tax Liability Resulting From Tax Reform, TCJA			$ 444.8
Loss (income) from continuing operations before income taxes	$ (86.4)	$ (86.9)
Effective tax rate	50.20%	48.30%
Current Income Tax Expense (Benefit)	$ 3.6	$ 33.9
Deferred Income Tax Expense (Benefit)	(47.0)	(75.9)
Income Taxes Paid, Net	13.8		73.4
Unrecognized tax benefits	200.6		182.5
Unrecognized tax benefits, net increase	18.1
Unrecognized tax benefits, net increase related to prior period tax positions	17.7
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0.1
Unrecognized tax benefits, additions related to current year tax positions	0.5
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	186.2
Interest accrued on unrecognized tax benefits	16.2		$ 7.1
Unrecognized tax benefits that would impact effective tax rate, upper bound of change	37.2
Income tax penalties and interest accrued that would impact effective tax rate, upper bound of change	6.0
Increase (Decrease) Tax Expense (Benefit) Due to U.S. Tax Reform		(23.6)
Increase (Decrease) Tax Expense (Benefit) Due to Divestiture		(33.0)
Sucampo [Member]
Income Taxes [Line Items]
Increase (Decrease) Deferred Tax Asset, Net Operating Losses	(28.0)
Increase (Decrease) Deferred Tax Assets, Tax Credits	5.4
Deferred tax benefit, intangible assets	182.0
Increase (Decrease) Deferred Tax Liability, Inventory Step-Up	24.1
Increase (Decrease) Deferred Tax Asset, Net	2.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other					$ 170.1
Specialty Generics Disposal Group
Income Taxes [Line Items]
Income tax expense	6.8	$ 2.5
Hemostasis Products
Income Taxes [Line Items]
Increase (Decrease) in Deferred Tax Liability, Future Consideration	(1.5)
Increase (Decrease) Deferred Tax Asset, Net Operating Losses	(2.4)
Deferred tax benefit, intangible assets	4.2
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	8.1
Increase (Decrease) Deferred Tax Liability, Inventory Step-Up	$ 3.0
Increase (Decrease), Deferred Tax Liability, Net				$ 3.0