Fair value of consideration paid (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	9 Months Ended	12 Months Ended
	Dec. 18, 2013	Mar. 29, 2014	Jun. 28, 2014	Dec. 18, 2013
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business Acquisition, Cash Exchange per share	$ 6.25			$ 6.25
Elan Corporation [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business acquisition, cash consideration paid on unvested stock options and awards			$ 16.1
Shares, Outstanding				515,700,000
Business Acquisition, Share Exchange Ratio				0.07636
Total Company shares issued to acquired company shareholders				39,400,000
Business Acquisition, Share Price				$ 155.34
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned				6,117.2
Business Acquisition, Cash Exchange				3,223.2
Business acquisition, cash consideration paid for vested stock options and awards				111.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				9,451.9
Business Acquisition, Percentage of Voting Interests Acquired				29.00%
Business Combination, Consideration Transferred		9,451.9
Payment for Business Combination, Cash Payment	$ 9,451.9
Perrigo Company (legacy) [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	71.00%			71.00%