Acquisitions Business Combination (Details) - Fair Value by Liability Class [Domain] $ / shares in Units, € in Millions, $ in Millions														3 Months Ended								9 Months Ended	12 Months Ended
		May. 12, 2015 USD ($)	Apr. 08, 2015 USD ($)	Mar. 30, 2015 EUR (€) shares	Mar. 30, 2015 USD ($) $ / shares shares	Dec. 05, 2014 USD ($)	Oct. 31, 2014 USD ($) products	Feb. 28, 2014	Feb. 18, 2014 USD ($)	Dec. 18, 2013 USD ($) shares $ / shares	Feb. 11, 2013 USD ($)	Feb. 01, 2013 USD ($)	Oct. 01, 2012 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 ($)	Dec. 28, 2013 USD ($)	Dec. 29, 2012 USD ($)	Mar. 28, 2015 USD ($)	Jun. 27, 2015 EUR (€) shares	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]
Proceeds from Issuance or Sale of Equity																								$ 999.3
Senior notes														$ 4,720.9				$ 2,300.0						4,720.9	$ 2,300.0				$ 2,300.0
Business Acquisition, Pro Forma Revenue																								5,671.3	5,816.3
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests																									7.2
Payment for Business Combination, Cash Payment																							€ 200.0	$ 223.4
Contingent consideration																		17.4							17.4
Percent of royalty revenues generated by specific agreement																							96.00%	96.00%
Business Acquisition, Effective Date of Acquisition		May 12, 2015
Purchase Accounting Adjustments																								$ (13.0)
Goodwill														4,971.9				3,474.1						4,971.9	3,474.1		$ 1,089.2
Restructuring															$ 1.1	$ 2.4	$ 1.7	10.5	$ 19.5	$ 14.9				5.1	47.0		$ 2.9
Business Combination, Acquisition Related Costs														18.5	$ 2.0	$ 17.8	$ 1.1
Business Acquisition, Pro Forma Net Income (Loss)																								$ 122.5	212.8
Extinguishment of Debt, Amount						$ 895.0
Developed Technology Rights [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																							12 years	12 years
Developed Technology Rights [Member] | Minimum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							4 years	4 years
Developed Technology Rights [Member] | Maximum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							13 years	13 years
Trademarks and Trade Names [Member] | Minimum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							8 years	8 years
Trademarks and Trade Names [Member] | Maximum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							20 years	20 years
Tysabri [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																										12.00%
Tysabri [Member] | Minimum [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																							18.00%	18.00%
Tysabri [Member] | Maximum [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																							25.00%	25.00%
Prialt [Member] | Minimum [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																							7.00%	7.00%
Prialt [Member] | Maximum [Member]
Business Acquisition [Line Items]
Percent of royalty revenues generated by specific agreement																							17.50%	17.50%
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																							20 years	20 years
Customer Relationships [Member] | Minimum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							7 years	7 years
Customer Relationships [Member] | Maximum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							21 years	21 years
Noncompete Agreements [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																							2 years	2 years
Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																							20 years	20 years
Naturwohl Pharma [Member]
Business Acquisition [Line Items]
Payment for Business Combination, Cash Payment																							€ 130.0	$ 145.2
Patheon [Member]
Business Acquisition [Line Items]
Payment for Business Combination, Cash Payment																								35.8
Omega [Member]
Business Acquisition [Line Items]
Foreign exchange impact on pro forma net sales																								189.3
Shares, Issued | shares					5,400,000
Business Acquisition, Share Price | $ / shares					$ 167.64
Treasury Stock, Shares, Acquired | shares				30,243,983	30,243,983
Shares, Outstanding | shares					685,300,000
Business Acquisition, Percentage of Voting Interests Acquired					95.77%
Payment for Business Combination, Cash Payment	[1]				$ 2,983.2
Business Acquisition, Effective Date of Acquisition				Mar. 30, 2015	Mar. 30, 2015
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[1]				$ 14.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	[1]				264.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	[1]				214.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current	[1]				6.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	[1]				39.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	[1]				121.2
Goodwill	[1]				1,513.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1]				3,802.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	[1]				2.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[1]				5,978.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	[1]				243.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, short term debt	[1]				24.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	[1]				44.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued payroll	[1]				51.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued customer programs	[1]				39.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	[1]				1,038.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	[1]				82.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	[1]				2,995.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	[1]				2,983.2
Business Combination, Acquisition Related Costs																								387.0
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned					904.9
Business Acquisition, Cash Exchange					2,078.3
Business acquisition, cash consideration paid for vested stock options and awards	[1]				$ 1,471.0
Debt Instrument, Maturity Date				Jan. 01, 2016	Jan. 01, 2016
Extinguishment of Debt, Amount			$ 539.1
Omega [Member] | Maximum [Member]
Business Acquisition [Line Items]
Indemnification available from acquired company's sellers				€ 277.0	$ 248.0
Omega [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1]				32.7
Omega [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1]				2,427.2
Omega [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1]				1,342.7
Omega [Member] | formulations [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1]				$ 0.0
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
Lumara [Member]
Business Acquisition [Line Items]
Payment for Business Combination, Cash Payment							$ 83.0
Business Acquisition, Effective Date of Acquisition							Oct. 31, 2014
Number of formulations | products							3
Smaller FY15 acquisitions [Member]
Business Acquisition [Line Items]
Payment for Business Combination, Cash Payment	[1],[2]																							118.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[1],[2]													4.6										4.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	[1],[2]													11.4										11.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	[1],[2]													8.7										8.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current	[1],[2]													0.6										0.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	[1],[2]													2.7										2.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	[1],[2]													6.1										6.1
Goodwill	[1],[2]													4.8										4.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1],[2]													93.0										93.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	[1],[2]													0.4										0.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[1],[2]													132.3										132.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	[1],[2]													4.6										4.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, short term debt	[1],[2]													0.0										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	[1],[2]													5.5										5.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued payroll	[1],[2]													0.0										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, accrued customer programs	[1],[2]													0.0										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	[1],[2]													3.3										3.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	[1],[2]													0.1										0.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	[1],[2]													13.5										13.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	[1],[2]													118.8										118.8
Business acquisition, cash consideration paid for vested stock options and awards	[1],[2]													0.0										0.0
Smaller FY15 acquisitions [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1],[2]													0.0										0.0
Smaller FY15 acquisitions [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1],[2]				$ 4.4
Smaller FY15 acquisitions [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1],[2]				6.6
Smaller FY15 acquisitions [Member] | formulations [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[1],[2]													82.0										82.0
Aspen Global [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition								Feb. 28, 2014
Fera (methazolomide) [Member]
Business Acquisition [Line Items]
Contingent consideration									$ 0.8
Business Acquisition, Effective Date of Acquisition									Feb. 18, 2014
Elan Corporation [Member]
Business Acquisition [Line Items]
Business Acquisition, Share Price | $ / shares										$ 155.34
Shares, Outstanding | shares										515,700,000
Business Acquisition, Percentage of Voting Interests Acquired										29.00%
Payment for Business Combination, Cash Payment										$ 9,451.9
Contingent consideration										$ 0.0
Business Acquisition, Effective Date of Acquisition										Dec. 18, 2013
Business Combination, Consideration Transferred										$ 9,451.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets										1,807.3
business combination, recognized identifiable assets acquired and liabilities assumed, investments										100.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables										44.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets										27.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment										9.2
Goodwill										2,333.1				$ 2,333.1				2,300.0						$ 2,333.1	2,300.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles										5,811.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets										93.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets										10,225.3
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										120.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent										631.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities										18.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities										773.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net										$ 9,451.9
Business Combination, Acquisition Related Costs																									284.9
Business Acquisition, Share Exchange Ratio | shares										0.07636
Total Company shares issued to acquired company shareholders | shares										39,400,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned										$ 6,117.2
Business Acquisition, Cash Exchange										3,223.2
Elan Corporation [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles										0.0
Elan Corporation [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles										0.0
Elan Corporation [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles										0.0
Elan Corporation [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles										$ 5,811.0
Smaller FY14 acquisitions [Member]
Business Acquisition [Line Items]
Payment for Business Combination, Cash Payment	[3]																								71.0
Contingent consideration	[3]																	0.8							0.8
Business Combination, Consideration Transferred	[3]																								71.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[3]																	0.0							0.0
business combination, recognized identifiable assets acquired and liabilities assumed, investments	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	[3]																	3.0							3.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	[3]																	0.0							0.0
Goodwill	[3]																	4.6							4.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[3]																	64.2							64.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[3]																	71.8							71.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	[3]																	0.0							0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	[3]																	71.8							71.8
Smaller FY14 acquisitions [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[3]																	34.8							34.8
Smaller FY14 acquisitions [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[3]																	9.8							9.8
Smaller FY14 acquisitions [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[3]																	1.8							1.8
Smaller FY14 acquisitions [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[3]																	$ 17.8							$ 17.8
Vedants Drug and Fine Chemicals Private Ltd [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																				15.00%													85.00%
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests																						$ 7.2						$ 11.5
Perrigo Company [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired										71.00%
Vedants Drug & Fine Chemicals [Domain]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition																									Aug. 06, 2009
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
Velcera, Inc. [Domain]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired																														100.00%
Payment for Business Combination, Cash Payment												$ 175.1
Contingent consideration												0.0
Business Acquisition, Effective Date of Acquisition																											Apr. 01, 2013
Business Combination, Consideration Transferred																											$ 175.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets												18.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables												6.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory												9.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment												0.6
Goodwill												62.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles												135.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent												7.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets												0.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets												241.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable												6.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities												4.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent												48.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities												7.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities												66.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net												175.1
Velcera, Inc. [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles												0.0
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												7.6
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												8.7
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												3.0
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												116.0
Velcera, Inc. [Domain] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles												0.0
Velcera, Inc. [Domain] | favorable supply agreement [Domain]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles												$ 0.0
Smaller FY13 acquisitions [Member]
Business Acquisition [Line Items]
Payment for Business Combination, Cash Payment	[4]																										139.9
Contingent consideration	[4]																										22.2
Business Combination, Consideration Transferred	[4]																										162.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[4]																										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	[4]																										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	[4]																										1.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	[4]																										0.0
Goodwill	[4]																										18.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										158.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent	[4]																										3.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	[4]																										0.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	[4]																										181.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	[4]																										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	[4]																										0.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	[4]																										18.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	[4]																										0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	[4]																										19.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	[4]																										162.1
Smaller FY13 acquisitions [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										158.1
Smaller FY13 acquisitions [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										0.0
Smaller FY13 acquisitions [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										0.0
Smaller FY13 acquisitions [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										0.0
Smaller FY13 acquisitions [Member] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										0.0
Smaller FY13 acquisitions [Member] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										0.0
Smaller FY13 acquisitions [Member] | favorable supply agreement [Domain]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	[4]																										$ 0.0
Rosemont Pharmaceuticals Ltd. [Domain]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired											100.00%
Payment for Business Combination, Cash Payment											$ 282.9
Contingent consideration											0.0
Business Acquisition, Effective Date of Acquisition																											Dec. 28, 2012
Business Combination, Consideration Transferred																											$ 282.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets											2.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables											10.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory											9.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment											13.1
Goodwill											147.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											148.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent											0.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets											0.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets											331.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable											2.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities											7.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent											36.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities											2.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities											48.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net											282.9
Rosemont Pharmaceuticals Ltd. [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																									14 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											114.6
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											17.3
Rosemont Pharmaceuticals Ltd. [Domain] | Customer Relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											0.0
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											1.5
Rosemont Pharmaceuticals Ltd. [Domain] | Distribution And License Agreements [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life																									7 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											3.6
Rosemont Pharmaceuticals Ltd. [Domain] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											11.2
Rosemont Pharmaceuticals Ltd. [Domain] | favorable supply agreement [Domain]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											$ 0.0
Cobrek Pharmaceuticals, Inc. [Domain]
Business Acquisition [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage																															81.50%			18.50%
Payment for Business Combination, Cash Payment																															$ 42.0			$ 12.6
Business Acquisition, Effective Date of Acquisition																											Feb. 11, 2013
Cobrek Pharmaceuticals, Inc. [Domain] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																									12 years
Sergeant's Pet Care Products, Inc. [Domain]
Business Acquisition [Line Items]
Payment for Business Combination, Cash Payment													$ 285.0
Contingent consideration													0.0
Business Acquisition, Effective Date of Acquisition																											Oct. 01, 2012
Business Combination, Consideration Transferred																											$ 285.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets													0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables													19.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory													37.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment													25.4
Goodwill													80.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles													135.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent													1.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets													3.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets													302.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable													13.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities													4.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent													0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities													0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities													17.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net													285.0
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													66.1
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													33.0
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													10.0
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													0.0
Sergeant's Pet Care Products, Inc. [Domain] | Noncompete Agreements [Member] | Minimum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																									1 year
Sergeant's Pet Care Products, Inc. [Domain] | Noncompete Agreements [Member] | Maximum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																									3 years
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													1.3
Inventory step-up charges																					$ 7.7
Fixed Assets Fair Value Adjustment																											$ 6.1
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, Finite-Lived Intangibles													0.0
Sergeant's Pet Care Products, Inc. [Domain] | favorable supply agreement [Domain]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																											7 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles													$ 25.0
Gelcaps [Member] | Customer-Related Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life		20 years
Gelcaps [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life		25 years
Aspen Global [Member] | Customer-Related Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							15 years	15 years
Aspen Global [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							25 years	25 years
Aspen Global [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							5 years	5 years
Lumara [Member] | Minimum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							8 years	8 years
Lumara [Member] | Maximum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life																							12 years	12 years
Interest Net [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																								$ 23.7
Interest Net [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																									$ 10.0
Other Expense [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																								324.0
Other Expense [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																									0.2
Discharge of Debt [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																								9.6
Discharge of Debt [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																									165.8
General and Administrative Expense [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																								$ 29.7
General and Administrative Expense [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs																									$ 108.9
5.1045% Senior Note [Member] | Omega [Member]
Business Acquisition [Line Items]
Business acquisition, cash consideration paid for vested stock options and awards					$ 147.0
Debt Instrument, Interest Rate, Stated Percentage					5.1045%
Debt Instrument, Maturity Date				Jan. 01, 2023	Jan. 01, 2023
6.19% Senior Note [Member] | Omega [Member]
Business Acquisition [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					6.19%
5.125% Retail Bond [Member] | Omega [Member]
Business Acquisition [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					5.125%
Debt Instrument, Maturity Date				Jan. 01, 2017	Jan. 01, 2017
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt					$ 326.7
4.5% Retail Bond [Member] | Omega [Member]
Business Acquisition [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					4.50%
Debt Instrument, Maturity Date				Jan. 01, 2017	Jan. 01, 2017
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt					$ 196.0
5.0% Retail Bond [Member] | Omega [Member]
Business Acquisition [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					5.00%
Debt Instrument, Maturity Date				Jan. 01, 2019	Jan. 01, 2019
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt					$ 130.7
Credit facility indebtedness [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt					544.5
Over Draft [Member] | Omega [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt					56.0
Inventories [Member] | Gelcaps [Member]
Business Acquisition [Line Items]
Inventory Adjustments		$ 0.6
Inventories [Member] | Omega [Member]
Business Acquisition [Line Items]
Inventory Adjustments					15.1
Property, Plant and Equipment [Member] | Gelcaps [Member]
Business Acquisition [Line Items]
Inventory Adjustments		$ 0.9
Property, Plant and Equipment [Member] | Omega [Member]
Business Acquisition [Line Items]
Inventory Adjustments					41.5
Long-term Debt [Member] | Omega [Member]
Business Acquisition [Line Items]
Inventory Adjustments					$ 101.9
Common Stock Issued [Member]
Business Acquisition [Line Items]
Treasury Stock, Shares, Acquired | shares																							100,000	100,000	60,000		112,000
Stock Issued During Period, Shares, New Issues | shares																							6,800,000	6,800,000
Shares, Outstanding | shares														146,300,000				133,800,000						146,300,000	133,800,000		94,100,000					93,500,000
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests																									$ 7.2

[1] Omega and Gelcaps opening balance sheets are preliminary.

[2] Includes opening balance sheets for the Gelcaps acquisition and Lumara product acquisition.

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

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