Acquisitions Asset Acquisitions (Details) (USD $)	12 Months Ended
	Jun. 28, 2014	May 01, 2014	Jun. 28, 2014 Tysabri [Member]	Jun. 28, 2014 Prialt [Member]	Jun. 28, 2014 Fera Pharmaceuticals, LLC [Domain] Developed Technology Rights [Member]	Jun. 28, 2014 Velcera, Inc. [Domain] Trademarks and Trade Names [Member]	Jun. 28, 2014 Velcera, Inc. [Domain] Noncompete Agreements [Member]	Jun. 28, 2014 Velcera, Inc. [Domain] Distribution And License Agreements [Member]	Jun. 28, 2014 Velcera, Inc. [Domain] Customer Relationships [Member]	Jun. 28, 2014 Rosemont Pharmaceuticals Ltd. [Domain] Noncompete Agreements [Member]	Jun. 28, 2014 Rosemont Pharmaceuticals Ltd. [Domain] Distribution And License Agreements [Member]	Jun. 28, 2014 Rosemont Pharmaceuticals Ltd. [Domain] Developed Technology Rights [Member]	Jun. 28, 2014 Cobrek Pharmaceuticals, Inc. [Domain] Developed Technology Rights [Member]	Jun. 29, 2013 Sergeant's Pet Care Products, Inc. [Domain] Developed Technology Rights [Member]	Jun. 29, 2013 Sergeant's Pet Care Products, Inc. [Domain] favorable supply agreement [Domain]	Jun. 28, 2014 Sergeant's Pet Care Products, Inc. [Domain] Customer Relationships [Member]	Jun. 28, 2014 Aspen Global [Member] Customer-Related Intangible Assets [Member]	Jun. 28, 2014 Aspen Global [Member] Trademarks and Trade Names [Member]	Jun. 28, 2014 Aspen Global [Member] Noncompete Agreements [Member]	Jun. 28, 2014 Fera (methazolomide) [Member] Customer-Related Intangible Assets [Member]	Jun. 28, 2014 Elan Corporation [Member] Tysabri [Member]	Jun. 28, 2014 Elan Corporation [Member] Prialt [Member]	Jun. 28, 2014 Minimum [Member] Tysabri [Member]	Jun. 28, 2014 Minimum [Member] Prialt [Member]	Jun. 28, 2014 Minimum [Member] Sergeant's Pet Care Products, Inc. [Domain] Noncompete Agreements [Member]	Jun. 28, 2014 Maximum [Member] Tysabri [Member]	Jun. 28, 2014 Maximum [Member] Prialt [Member]	Jun. 28, 2014 Maximum [Member] Sergeant's Pet Care Products, Inc. [Domain] Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Percent of royalty revenues generated by specific agreement	92.00%	12.00%																					18.00%	7.00%		25.00%	17.50%
Net sales for royalties																							$ 2,000,000,000			$ 2,000,000,000
Finite-lived Intangible Assets Acquired			$ 5,800,000,000	$ 11,000,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					15 years	25 years	3 years	10 years	20 years	3 years	7 years	14 years	12 years	10 years	7 years	20 years	15 years	25 years	5 years	15 years	20 years	10 years			1 year			3 years