Acquisitions, License Agreements and Other Investments (Narrative) (Details) - USD ($)			3 Months Ended		9 Months Ended
	Aug. 06, 2018	Feb. 13, 2018	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017	Aug. 04, 2018	Apr. 05, 2018	Dec. 29, 2017
Business Acquisition [Line Items]
Amortization of Intangible Assets			$ 184,200,000	$ 169,300,000	$ 544,800,000	$ 508,400,000
Long-term Debt			6,243,100,000		6,243,100,000				$ 6,492,600,000
Sucampo [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		$ 1,200,000,000
Amortization of Intangible Assets			18,000,000.0	0	45,000,000.0	0
Business Combination Consideration Transferred, Net Of Cash		698,000,000.0
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		36,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		681,000,000.0
Business Combination, Acquisition Related Costs					3,200,000
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		170,200,000
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					244,700,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Other		25,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		1,528,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		108,300,000
CPP [Member]
Business Acquisition [Line Items]
Payment for License Option Exercised								$ 10,000,000.0
Business Combination, Contingent Consideration, Payment	$ 5,000,000.0
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High							$ 185,000,000.0
Potential reduction of future payment							$ 15,000,000.0
Research and Development Expense [Member] | CPP [Member]
Business Acquisition [Line Items]
Payment for License Option Exercised, Expensed					7,300,000
Cost of Sales | Sucampo [Member]
Business Acquisition [Line Items]
Amortization Of Inventory Step-Up To Cost Of Sales			31,000,000.0	$ 0	77,500,000	$ 0
Convertible Debt Securities [Member] | Sucampo 2021 Notes [Member]
Business Acquisition [Line Items]
Debt Conversion, Converted Instrument, Amount		1,221
Long-term Debt		$ 300,000,000.0
Stated interest rate		3.25%
Debt Instrument, Face Amount		$ 1,000
Secured Debt | Term Loan due 2025
Business Acquisition [Line Items]
Loans Payable			597,000,000.0		597,000,000.0				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		600,000,000.0
Unsecured Debt | 2017 Revolving Credit Facility
Business Acquisition [Line Items]
Long-term Debt		$ 900,000,000.0
Prepaid Expenses and Other Current Assets [Member] | CPP [Member]
Business Acquisition [Line Items]
Payment for License Option Exercised, Capitalized			$ 2,700,000