Fair value of consideration paid (Details) $ / shares in Units, $ in Millions	Mar. 30, 2015 USD ($) $ / shares shares	Dec. 18, 2013 USD ($) shares $ / shares
Omega [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Shares, Issued | shares	5,400,000
Business Acquisition, Share Price | $ / shares	$ 167.64
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 904.9
Business Acquisition, Cash Exchange	2,078.3
Payments to Acquire Businesses, Gross	$ 2,983.2
Shares, Outstanding | shares	685,348,257
Elan Corporation [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Business Acquisition, Share Price | $ / shares		$ 155.34
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned		$ 6,117.2
Business Acquisition, Cash Exchange		3,223.2
Payments to Acquire Businesses, Gross		$ 9,451.9
Shares, Outstanding | shares		515,700,000
Business Acquisition, Share Exchange Ratio | shares		0.07636
Business acquisition, cash consideration paid for vested stock options and awards		$ 111.5
Total Company shares issued to acquired company shareholders | shares		39,400,000