Business Acquisitions (Details) (USD $)	0 Months Ended	9 Months Ended	0 Months Ended			12 Months Ended
	Oct. 31, 2014 products	Mar. 28, 2015	Feb. 28, 2014	Feb. 18, 2014	Dec. 18, 2013	Jun. 28, 2014	Jun. 27, 2009	May 01, 2014	Dec. 28, 2013	Aug. 06, 2009
Business Acquisition [Line Items]
Business Acquisition, Cash Exchange per share					$ 6.25
Goodwill		$ 3,403,900,000				$ 3,474,100,000
Contingent consideration		12,400,000				17,400,000
Lumara [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Oct. 31, 2014
Payments to Acquire Businesses, Gross		83,000,000
Number of formulations	3
Business Combination, Total Consideration Transferred		83,000,000
Assets acquired - receivables		2,900,000
Assets acquired, Inventory		1,500,000
Assets acquired - prepaids		400,000
Assets acquired - Property and equipment, net		100,000
Assets acquired, Noncurrent Assets		86,900,000
Liabilities assumed, Accounts Payable		3,900,000
Net assets acquired and liabilities assumed		83,000,000
Perrigo Company [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired					71.00%
Share Price					0.01
Aspen Global [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Feb. 28, 2014
Payments to Acquire Businesses, Gross			53,700,000
Goodwill			4,600,000
Contingent consideration			0
Business Combination, Total Consideration Transferred			53,700,000
Assets acquired, Cash and Equivalents			0
Acquired assets - Investments			0
Assets acquired - receivables			0
Assets acquired, Inventory			2,700,000
Assets acquired - prepaids			0
Assets acquired - Property and equipment, net			0
Assets acquired - Finite-Lived Intangibles			46,400,000
Assets acquired, Noncurrent Assets			0
Assets acquired - Total Assets			53,700,000
Liabilities assumed, Accounts Payable			0
Liabilities assumed - Current Liabilities			0
Liabilities assumed, Deferred Tax Liabilities			0
Liabilities assumed, Noncurrent Liabilities			0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			0
Net assets acquired and liabilities assumed			53,700,000
Fera (methazolomide) [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition				Feb. 18, 2014
Payments to Acquire Businesses, Gross				17,300,000
Goodwill				0
Contingent consideration				800,000
Business Combination, Total Consideration Transferred				18,100,000
Assets acquired, Cash and Equivalents				0
Acquired assets - Investments				0
Assets acquired - receivables				0
Assets acquired, Inventory				300,000
Assets acquired - prepaids				0
Assets acquired - Property and equipment, net				0
Assets acquired - Finite-Lived Intangibles				17,800,000
Assets acquired, Noncurrent Assets				0
Assets acquired - Total Assets				18,100,000
Liabilities assumed, Accounts Payable				0
Liabilities assumed - Current Liabilities				0
Liabilities assumed, Deferred Tax Liabilities				0
Liabilities assumed, Noncurrent Liabilities				0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				0
Net assets acquired and liabilities assumed				18,100,000
Elan Corporation [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition					Dec. 18, 2013
Payments to Acquire Businesses, Gross					9,451,900,000
Business Acquisition, Percentage of Voting Interests Acquired					29.00%
Share Price					3,223,200,000
Total Company shares issued to acquired company shareholders					39,400,000
Shares, Outstanding					515,700,000
Business Acquisition, Share Exchange Ratio					0.07636
Business Acquisition, Share Price					$ 155.34
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned					6,117,200,000
Business acquisition, cash consideration paid for vested stock options and awards					111,500,000
Business acquisition, cash consideration paid on unvested stock options and awards						16,100,000
Business Combination, Acquisition Related Costs						284,900,000
Goodwill		2,333,100,000			2,333,100,000
Business combination provisional adjustment, initial valuation incomplete, non-current liabilities		13,000,000
Contingent consideration					0
Business Combination, Total Consideration Transferred					9,451,900,000
Assets acquired, Cash and Equivalents					1,807,300,000
Acquired assets - Investments					100,000,000
Assets acquired - receivables					44,200,000
Assets acquired, Inventory					0
Assets acquired - prepaids					27,100,000
Assets acquired - Property and equipment, net					9,200,000
Assets acquired - Finite-Lived Intangibles					5,811,000,000
Assets acquired, Noncurrent Assets					93,400,000
Assets acquired - Total Assets					10,225,300,000
Liabilities assumed, Accounts Payable					2,000,000
Liabilities assumed - Current Liabilities					120,800,000
Liabilities assumed, Deferred Tax Liabilities					631,800,000
Liabilities assumed, Noncurrent Liabilities					18,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities					773,400,000
Net assets acquired and liabilities assumed					9,451,900,000
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		7,200,000					11,500,000
Trademarks and Trade Names [Member] | Aspen Global [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles			34,800,000
Trademarks and Trade Names [Member] | Fera (methazolomide) [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles				0
Trademarks and Trade Names [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles					0
Customer Relationships [Member] | Aspen Global [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles			9,800,000
Customer Relationships [Member] | Fera (methazolomide) [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles				0
Customer Relationships [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles					0
Noncompete Agreements [Member] | Aspen Global [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles			1,800,000
Noncompete Agreements [Member] | Fera (methazolomide) [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles				0
Noncompete Agreements [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles					0
Product Formulations [Member] | Lumara [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles		82,000,000
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
Distribution And License Agreements [Member] | Aspen Global [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles			0
Distribution And License Agreements [Member] | Fera (methazolomide) [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles				17,800,000
Distribution And License Agreements [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Assets acquired - Finite-Lived Intangibles					5,811,000,000
Minimum [Member] | Lumara [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		8 years
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%
Maximum [Member] | Lumara [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		12 years
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%
Consumer Healthcare [Member]
Business Acquisition [Line Items]
Goodwill		1,387,400,000				1,406,300,000
Consumer Healthcare [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Goodwill		1,110,000,000
Rx Pharmaceuticals [Member]
Business Acquisition [Line Items]
Goodwill		1,222,200,000				1,258,300,000
Rx Pharmaceuticals [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Goodwill		845,100,000
Nutritionals [Member]
Business Acquisition [Line Items]
Goodwill		509,100,000				510,100,000
Nutritionals [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Goodwill		177,400,000
Specialty Sciences [Member]
Business Acquisition [Line Items]
Goodwill		200,700,000				201,800,000
Specialty Sciences [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Goodwill		200,600,000
General and Administrative Expense [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs						108,900,000
Interest expense, net [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs						10,000,000
Other expense (income), net [member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs						200,000
Loss on extinguishment of debt [Member] | Elan Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs						$ 165,800,000
Aspen Global [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Aspen Global [Member] | Trademarks and Trade Names [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		25 years
Aspen Global [Member] | Noncompete Agreements [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years
Elan Corporation [Member] | Tysabri [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		20 years
Elan Corporation [Member] | Prialt [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Fera (methazolomide) [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years