Acquisitions and License Agreements (Schedule of Reconciliation of Total Consideration) (Details) - USD ($) $ in Millions						12 Months Ended
		Feb. 13, 2018	Dec. 11, 2017		Sep. 25, 2017	Dec. 28, 2018	Dec. 29, 2017
Ocera [Member]
Business Acquisition [Line Items]
Total consideration, net of cash	[1]		$ 63.4
Plus: cash assumed in acquisition	[1],[2]		1.0
Total consideration			64.4	[1]		$ 1.9	$ 40.5
Less: non-cash contingent consideration	[1]		(22.0)
Net assets acquired	[1],[2]		$ 42.4
InfaCare [Member]
Business Acquisition [Line Items]
Total consideration, net of cash					$ 71.8
Plus: cash assumed in acquisition	[3]				1.3
Total consideration					73.1
Less: non-cash contingent consideration	[3]				(35.0)
Net assets acquired	[3]				$ 38.1
Sucampo [Member]
Business Acquisition [Line Items]
Total consideration, net of cash		$ 698.0
Plus: cash assumed in acquisition		149.6
Total consideration		847.6
Less: non-cash contingent consideration		0.0
Net assets acquired		$ 847.6

[1] $1.9 million of the total consideration, net of cash was paid in fiscal 2018, subsequent to the Company's December 11, 2017 acquisition date.

[2] Of the $42.4 million net assets acquired for Ocera, $40.5 million and $1.9 million was paid in fiscal 2017 and 2018, respectively.

[3] During fiscal 2019, the Company recognized a full impairment of the IPR&D asset related to stannsoporfin of $113.5 million. During fiscal 2018, the Company reduced the contingent consideration liability related to this acquisition to zero through the recognition of a $35.0 million fair value adjustment. Refer to Note 13 and 21 for further information.