Acquisitions Business Combination (Details) $ / shares in Units, € in Millions																		3 Months Ended													6 Months Ended					9 Months Ended	12 Months Ended
		Dec. 15, 2015 USD ($)		Sep. 15, 2015 USD ($)	Sep. 15, 2015 EUR (€)	Aug. 28, 2015 USD ($)		May. 12, 2015 USD ($)	Mar. 30, 2015 USD ($) shares	Mar. 30, 2015 EUR (€) shares	Oct. 31, 2014 USD ($) products	Feb. 28, 2014	Feb. 18, 2014	Dec. 18, 2013 USD ($) $ / shares shares	Feb. 11, 2013 USD ($)	Feb. 01, 2013 USD ($)	Oct. 01, 2012 USD ($)	Dec. 31, 2015 USD ($) shares		Sep. 26, 2015 USD ($)	Jun. 27, 2015 USD ($) shares	Mar. 28, 2015 USD ($)	Dec. 27, 2014 USD ($)	Sep. 27, 2014 USD ($)	Jun. 28, 2014 USD ($) shares		Mar. 29, 2014 USD ($)	Dec. 28, 2013 USD ($)	Sep. 28, 2013 USD ($)	Dec. 29, 2012 USD ($)	Dec. 31, 2015 USD ($) shares		Dec. 27, 2014 USD ($)	Dec. 28, 2013 USD ($)		Mar. 28, 2015 USD ($)	Jun. 27, 2015 USD ($) shares		Jun. 28, 2014 USD ($) shares		May. 01, 2014	Jun. 29, 2013 USD ($) shares		Jun. 27, 2009 USD ($)	Nov. 08, 2013 USD ($)	Apr. 01, 2013	Dec. 28, 2012 USD ($)	Jun. 30, 2012 shares	Aug. 06, 2009	May. 29, 2008 USD ($)
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																															93.00%
Sales Revenue, Goods, Net																		$ 1,424,800,000		$ 1,344,700,000	$ 1,531,600,000	$ 1,049,100,000	$ 1,071,700,000	$ 951,500,000	$ 1,144,200,000		$ 1,004,200,000	$ 979,000,000	$ 933,400,000		$ 2,769,500,000		$ 2,023,100,000				$ 4,603,900,000		$ 4,060,800,000			$ 3,539,800,000
Operating income																															94,500,000	[1]	$ 321,500,000	$ 567,000,000	[1]		747,700,000	[1]	567,000,000			679,100,000	[1]
Senior Notes																		4,698,300,000			4,720,900,000				2,300,000,000						4,698,300,000						4,720,900,000		2,300,000,000						$ 2,300,000,000
Goodwill, Purchase Accounting Adjustments																															388,200,000						(13,000,000)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests																																							7,200,000
Contingent consideration				$ 0
Goodwill																		5,364,900,000			4,971,900,000				3,474,100,000						5,364,900,000						4,971,900,000		3,474,100,000			1,089,200,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)																		1,916,300,000			2,263,100,000				69,700,000						1,916,300,000						2,263,100,000		69,700,000
Finite-Lived Intangible Assets, Gross																		9,512,200,000			9,160,600,000				7,394,100,000						9,512,200,000						9,160,600,000		7,394,100,000
Proceeds from Issuance or Sale of Equity																																					999,300,000
Business Acquisition, Cash Exchange per share | $ / shares														$ 6.25
In Process Research and Development [Member]
Business Acquisition [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		$ 0	[2]	0		$ 0	[2]											48,200,000			5,800,000				10,200,000						$ 48,200,000						5,800,000		10,200,000
Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																															19 years
Finite-Lived Intangible Assets, Gross																		6,053,400,000			6,029,900,000				6,027,300,000						$ 6,053,400,000						6,029,900,000		6,027,300,000
Developed Technology Rights [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																															10 years
Finite-Lived Intangible Assets, Gross				$ 0														1,383,500,000			1,025,300,000				931,700,000						$ 1,383,500,000						1,025,300,000		931,700,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																															17 years
Finite-Lived Intangible Assets, Gross																		1,520,700,000			1,749,900,000				372,000,000						$ 1,520,700,000						1,749,900,000		372,000,000
Noncompete Agreements [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																															2 years
Finite-Lived Intangible Assets, Gross																		15,200,000			14,700,000				15,300,000						$ 15,200,000						14,700,000		15,300,000
Tysabri [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																																									12.00%
Finite-lived Intangible Assets Acquired																																					5,800,000,000
Prialt [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired																																					$ 11,000,000
Entocort [Member]
Business Acquisition [Line Items]
Purchase price paid	[2]	380,200,000
Contingent consideration	[2]	0
Total purchase consideration	[2]	380,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	[2]	200,000
Goodwill	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]	380,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[2]	380,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	[2]	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	[2]	380,200,000
Entocort [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]	0
Entocort [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	[2]	380,000,000
Entocort [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]	0
Entocort [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]	0
Entocort [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]	$ 0
Naturwohl Pharma [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired				100.00%
Business Acquisition, Effective Date of Acquisition				Sep. 15, 2015	Sep. 15, 2015
Purchase price paid				$ 150,400,000
Total purchase consideration				150,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents				4,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables				3,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory				1,500,000
Goodwill				61,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				111,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				182,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable				2,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities				1,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent				27,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				31,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				$ 150,400,000
Naturwohl Pharma [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life				3 years	3 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 21,400,000
Naturwohl Pharma [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life				15 years	15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 25,900,000
Naturwohl Pharma [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life				20 years	20 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 64,200,000
Naturwohl Pharma [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life				3 years	3 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 300,000
ScarAway [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition						Aug. 28, 2015
Purchase price paid						$ 26,700,000
Contingent consideration						0
Total purchase consideration						26,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents						0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables						0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory						1,000,000
Goodwill						3,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						22,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets						26,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable						0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities						0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent						0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities						0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						26,700,000
ScarAway [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 0
ScarAway [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life						8 years
Finite-Lived Intangible Assets, Gross						$ 500,000
ScarAway [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life						15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 9,800,000
ScarAway [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life						25 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 11,400,000
ScarAway [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life						4 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 500,000
GSK [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition						Aug. 28, 2015
Purchase price paid	[2]					$ 223,600,000
Contingent consideration	[2]					0
Total purchase consideration	[2]					223,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	[2]					0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	[2]					0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	[2]					0
Goodwill	[2]					32,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]					191,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[2]					223,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	[2]					0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	[2]					0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	[2]					0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	[2]					0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	[2]					223,600,000
GSK [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]					0
GSK [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	[2]					$ 0
GSK [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life						15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]					$ 61,500,000
GSK [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life						20 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]					$ 129,500,000
GSK [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[2]					0
All other acquisitions [Member]
Business Acquisition [Line Items]
Business acquisitions, number of products purchased																															8
Purchase price paid																															15,300,000	[3]							71,000,000	[4]		139,900,000	[5]
Contingent consideration																		13,900,000	[3]						800,000	[4]					13,900,000	[3]							800,000	[4]		22,200,000	[5]
Total purchase consideration																															29,200,000	[3]							71,800,000	[4]		162,100,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents																		0	[3]						0	[4]					0	[3]							0	[4]		0	[5]
business combination, recognized identifiable assets acquired and liabilities assumed, investment securities	[4]																								0														0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables																		0	[3]						0	[4]					0	[3]							0	[4]		0	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory																		0	[3]						3,000,000	[4]					0	[3]							3,000,000	[4]		1,300,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment																									0	[4]													0	[4]		0	[5]
Goodwill																		0	[3]						4,600,000	[4]					0	[3]							4,600,000	[4]		18,100,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		29,200,000	[3]						64,200,000	[4]					29,200,000	[3]							64,200,000	[4]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	[5]																																									158,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent	[5]																																									3,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets																									0	[4]													0	[4]		300,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets																		29,200,000	[3]						71,800,000	[4]					29,200,000	[3]							71,800,000	[4]		181,400,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable																		0	[3]						0	[4]					0	[3]							0	[4]		0	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities																		0	[3]						0	[4]					0	[3]							0	[4]		500,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent																		0	[3]						0	[4]					0	[3]							0	[4]		18,800,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities																									0	[4]													0	[4]		0	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities																		0	[3]						0	[4]					0	[3]							0	[4]		19,300,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net																		29,200,000	[3]						71,800,000	[4]					29,200,000	[3]							71,800,000	[4]		162,100,000	[5]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	[4]																								0														0
All other acquisitions [Member] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	[5]																																									0
Indefinite-Lived Intangible Assets (Excluding Goodwill)	[3]																	29,200,000													29,200,000
All other acquisitions [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets																																										0
All other acquisitions [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		0	[3]						17,800,000	[4]					0	[3]							17,800,000	[4]		0	[5]
All other acquisitions [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[5]																																									158,100,000
Finite-Lived Intangible Assets, Gross	[3]																	0													0
All other acquisitions [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		0	[3]						9,800,000	[4]					0	[3]							9,800,000	[4]		0	[5]
All other acquisitions [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		0	[3]						34,800,000	[4]					0	[3]							34,800,000	[4]		0	[5]
All other acquisitions [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		0	[3]						1,800,000	[4]					0	[3]							$ 1,800,000	[4]		$ 0	[5]
Gelcaps [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired								100.00%
Business Acquisition, Effective Date of Acquisition								May 12, 2015
Purchase price paid								$ 37,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents								4,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables								7,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory								7,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment								6,000,000
Goodwill								6,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles								11,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets								400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets								44,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable								3,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, short term debt								0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities								1,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent								1,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities								400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities								6,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net								37,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets								2,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued payroll								0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued customer programs								0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt								0
Gelcaps [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles								4,400,000
Gelcaps [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles								$ 0
Gelcaps [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life								20 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles								$ 6,600,000
Gelcaps [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life								25 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles									$ 0
Omega [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired									95.77%
Business Acquisition, Effective Date of Acquisition									Mar. 30, 2015	Mar. 30, 2015
Purchase price paid									$ 2,983,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents									14,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables																		260,100,000													260,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory																		202,500,000													202,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment																		130,800,000													130,800,000
Goodwill																		1,900,400,000													1,900,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles									3,374,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets									2,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets									5,924,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable									243,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, short term debt									24,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities																		43,900,000													43,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent																		1,014,500,000													1,014,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities																		53,500,000													53,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities									2,941,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net									2,983,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets																		39,200,000													39,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued payroll									51,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued customer programs									39,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt									$ 1,471,000,000
Shares, Outstanding | shares									685,348,257
Treasury Stock, Shares, Acquired | shares									30,243,983	30,243,983
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles																															10,200,000
Omega [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		2,003,800,000													2,003,800,000
Omega [Member] | Brands [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life									22 years	22 years
Omega [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		27,200,000													27,200,000
Omega [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life									21 years	21 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		1,056,300,000													1,056,300,000
Omega [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life									8 years	8 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																		$ 287,500,000													287,500,000
Omega [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									3 years	3 years
Omega [Member] | Non-solicit agreement [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									2 years	2 years
Fera Pharmaceuticals, LLC [Domain]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition																																										Jun. 17, 2013
Fera Pharmaceuticals, LLC [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							15 years
Lumara [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition											Oct. 31, 2014
Purchase price paid											$ 83,000,000
Number of formulations | products											3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents											$ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables											2,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory											1,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment											100,000
Goodwill											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											82,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets											86,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, short term debt											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities											3,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities											3,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net											83,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets											400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued payroll											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued customer programs											0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt											0
Lumara [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											0
Lumara [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											82,000,000
Lumara [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											0
Lumara [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											$ 0
Elan Corporation [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired														29.00%
Business Acquisition, Effective Date of Acquisition														Dec. 18, 2013
Purchase price paid														$ 9,451,900,000
Contingent consideration														0
Total purchase consideration														9,451,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents														1,807,300,000
business combination, recognized identifiable assets acquired and liabilities assumed, investment securities														100,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables														44,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory														0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment														9,200,000
Goodwill														2,333,100,000											$ 2,300,000,000														$ 2,300,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles														5,811,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets														93,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets														10,225,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable														2,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities														120,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent														631,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities														18,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities														773,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net														9,451,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets														$ 27,100,000
Shares, Outstanding | shares														515,700,000
Business acquisition, cash consideration paid on unvested stock options and awards																																							$ 16,100,000
Elan Corporation [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles														$ 5,811,000,000
Elan Corporation [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles														0
Elan Corporation [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles														0
Elan Corporation [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles														$ 0
Fera (methazolomide) [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition													Feb. 18, 2014
Fera (methazolomide) [Member] | Customer-Related Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																					15 years
Aspen Global [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition												Feb. 28, 2014
Aspen Global [Member] | Customer-Related Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																					15 years
Aspen Global [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																					25 years
Aspen Global [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																					5 years
Vedants Drug & Fine Chemicals [Domain]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																												15.00%						15.00%															85.00%
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests																																				$ 7,200,000								$ 11,500,000
Business Acquisition, Effective Date of Acquisition																																							Aug. 06, 2009
Perrigo Company [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired														71.00%
Sergeant's Pet Care Products, Inc. [Domain]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition																																										Oct. 01, 2012
Purchase price paid																	$ 285,000,000
Contingent consideration																	0
Total purchase consideration																																										$ 285,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents																	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables																	19,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory																	37,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment																	25,400,000
Goodwill																	80,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets																	135,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent																	1,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets																	3,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets																	302,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable																	13,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities																	4,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent																	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities																	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities																	17,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net																	285,000,000
Sergeant's Pet Care Products, Inc. [Domain] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets																	0
Sergeant's Pet Care Products, Inc. [Domain] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets																	33,000,000
Sergeant's Pet Care Products, Inc. [Domain] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	25,000,000
Sergeant's Pet Care Products, Inc. [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																										10 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	66,100,000
Sergeant's Pet Care Products, Inc. [Domain] | favorable supply agreement [Domain]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																										7 years
Sergeant's Pet Care Products, Inc. [Domain] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							20 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	10,000,000
Sergeant's Pet Care Products, Inc. [Domain] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	0
Sergeant's Pet Care Products, Inc. [Domain] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																	$ 1,300,000
Rosemont Pharmaceuticals Ltd. [Domain]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired															100.00%
Business Acquisition, Effective Date of Acquisition																																										Dec. 28, 2012
Purchase price paid															$ 282,900,000
Contingent consideration															0
Total purchase consideration																																										$ 282,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents															2,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables															10,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory															9,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment															13,100,000
Goodwill															147,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets															148,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent															200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets															800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets															331,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable															2,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities															7,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent															36,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities															2,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities															48,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net															282,900,000
Rosemont Pharmaceuticals Ltd. [Domain] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets															11,200,000
Rosemont Pharmaceuticals Ltd. [Domain] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets															17,300,000
Rosemont Pharmaceuticals Ltd. [Domain] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles															3,600,000
Rosemont Pharmaceuticals Ltd. [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																																							7 years
Finite-Lived Intangible Asset, Useful Life																																							14 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles															114,600,000
Rosemont Pharmaceuticals Ltd. [Domain] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles															0
Rosemont Pharmaceuticals Ltd. [Domain] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles															0
Rosemont Pharmaceuticals Ltd. [Domain] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							3 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles															$ 1,500,000
Cobrek Pharmaceuticals, Inc. [Domain]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition																																										Feb. 11, 2013
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage																																															81.50%			18.50%
Payment for Business Combination, Cash Payment																																															$ 42,000,000			$ 12,600,000
Cobrek Pharmaceuticals, Inc. [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							12 years
Velcera, Inc. [Domain]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																																														100.00%
Business Acquisition, Effective Date of Acquisition																																										Apr. 01, 2013
Purchase price paid																$ 175,100,000
Contingent consideration																0
Total purchase consideration																																										$ 175,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents																18,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables																6,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory																9,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment																600,000
Goodwill																62,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets																135,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent																7,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets																400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets																241,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable																6,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities																4,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent																48,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities																7,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities																66,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net																175,100,000
Velcera, Inc. [Domain] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets																0
Velcera, Inc. [Domain] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets																0
Velcera, Inc. [Domain] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							10 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																116,000,000
Velcera, Inc. [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																0
Velcera, Inc. [Domain] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							20 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																8,700,000
Velcera, Inc. [Domain] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							25 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																7,600,000
Velcera, Inc. [Domain] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							3 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles																$ 3,000,000
Stub period 2015 acquisitions [Member]
Business Acquisition [Line Items]
Sales Revenue, Goods, Net																															51,000,000
Operating income																															$ 20,600,000
Fiscal 2015 acquisitions [Member]
Business Acquisition [Line Items]
Sales Revenue, Goods, Net																																					$ 418,200,000
Operating income																																					$ 18,900,000
Fiscal 2014 acquisitions [Member]
Business Acquisition [Line Items]
Sales Revenue, Goods, Net																																							$ 168,500,000
Operating income																																							$ (53,900,000)
Inventories [Member] | Gelcaps [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory								$ 600,000
Inventories [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory									$ 15,100,000
Inventories [Member] | Sergeant's Pet Care Products, Inc. [Domain]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory																														$ 7,700,000
Property, Plant and Equipment [Member] | Gelcaps [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment								$ 900,000
Property, Plant and Equipment [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment									41,500,000
Property, Plant and Equipment [Member] | Sergeant's Pet Care Products, Inc. [Domain]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory																																										$ 6,100,000
Long-term Debt [Member] | Omega [Member]
Business Acquisition [Line Items]
Business combination fair value adjustment									$ 101,900,000
Minimum [Member] | Tysabri [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																																					18.00%
Sales Revenue, Goods, Net																																					$ 2,000,000,000
Minimum [Member] | Prialt [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																																					7.00%
Minimum [Member] | Entocort [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life		7 years
Minimum [Member] | Omega [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life									4 years	4 years
Minimum [Member] | Lumara [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life											8 years
Minimum [Member] | Sergeant's Pet Care Products, Inc. [Domain] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							1 year
Maximum [Member] | Tysabri [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																																					25.00%
Sales Revenue, Goods, Net																																					$ 2,000,000,000
Maximum [Member] | Prialt [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																																					17.50%
Maximum [Member] | Entocort [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life		15 years
Maximum [Member] | Omega [Member]
Business Acquisition [Line Items]
Indemnification available from acquired company's sellers | €										€ 277.0
Maximum [Member] | Omega [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life									13 years	13 years
Maximum [Member] | Lumara [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life											12 years
Maximum [Member] | Sergeant's Pet Care Products, Inc. [Domain] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																							3 years
Euro Member Countries, Euro | Naturwohl Pharma [Member]
Business Acquisition [Line Items]
Purchase price paid | €					€ 133.5
Euro Member Countries, Euro | GSK [Member]
Business Acquisition [Line Items]
Purchase price paid						$ 200,000,000
Euro Member Countries, Euro | Maximum [Member] | Omega [Member]
Business Acquisition [Line Items]
Indemnification available from acquired company's sellers									$ 248,000,000
2014 bonds [Member]
Business Acquisition [Line Items]
Senior Notes																					$ 1,600,000,000																$ 1,600,000,000
Common Stock [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests																																							$ 7,200,000
Shares, Outstanding | shares																		143,100,000			146,300,000				133,800,000						143,100,000						146,300,000		133,800,000			94,100,000						93,500,000
Treasury Stock, Shares, Acquired | shares																															100,000						100,000		100,000			100,000
Stock Issued During Period, Shares, New Issues | shares																																					6,800,000
Level 3 | Contingent Consideration Classified as Equity [Member]
Business Acquisition [Line Items]
Settlements																															$ 0						$ (18,300,000)		$ (6,700,000)
Elan Corporation [Member] | Tysabri [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																					20 years
Elan Corporation [Member] | Prialt [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																																					10 years

[1] Amounts may not cross-foot due to rounding.

[2] Opening balance sheet is preliminary.

[3] Consists of eight product acquisitions in our CHC, BCH and Rx segments.

[4] Includes opening balance sheet of the Aspen and Fera (Methazolomide) product acquisitions.

[5] Includes opening balance sheet of the Cobrek acquisition and Fera product acquisition.