Acquisitions, License Agreements and Other Investments (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 13, 2018	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017	Apr. 05, 2018	Dec. 29, 2017
Business Acquisition [Line Items]
Amortization of Intangible Assets		$ 184,300,000	$ 169,300,000	$ 360,600,000	$ 339,100,000
Long-term Debt		6,408,100,000		6,408,100,000			$ 6,492,600,000
Sucampo [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 1,200,000,000
Amortization of Intangible Assets		17,900,000	0	27,000,000	0
Business Combination Consideration Transferred, Net Of Cash	698,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	149,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	36,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	682,000,000
Business Combination, Acquisition Related Costs				2,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	847,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	170,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	366,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	35,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	153,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	919,500,000
Goodwill, Acquired During Period				246,000,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Other	25,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	1,529,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	108,200,000
CPP [Member]
Business Acquisition [Line Items]
Payment for License Option Exercised						$ 10,000,000
Research and Development Expense [Member] | CPP [Member]
Business Acquisition [Line Items]
Payment for License Option Exercised, Expensed		6,300,000
Cost of Sales | Sucampo [Member]
Business Acquisition [Line Items]
Amortization Of Inventory Step-Up To Cost Of Sales		31,500,000	$ 0	46,500,000	$ 0
Convertible Debt Securities [Member] | Sucampo 2021 Notes [Member]
Business Acquisition [Line Items]
Debt Conversion, Converted Instrument, Amount	1,221
Long-term Debt	$ 300,000,000
Stated interest rate	3.25%
Debt Instrument, Face Amount	$ 1,000
Secured Debt | Term Loan due 2025
Business Acquisition [Line Items]
Loans Payable		598,500,000		598,500,000			0
Long-term Debt		592,500,000		$ 592,500,000			$ 0
Secured Debt | Term Loan due 2025 | Sucampo [Member]
Business Acquisition [Line Items]
Loans Payable	600,000,000
Unsecured Debt | 2015 Revolving Credit Facility
Business Acquisition [Line Items]
Long-term Debt	$ 900,000,000
Prepaid Expenses and Other Current Assets [Member] | CPP [Member]
Business Acquisition [Line Items]
Payment for License Option Exercised, Capitalized		$ 3,700,000