Acquisitions Schedule of acquisition costs (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 27, 2015	Dec. 27, 2014	Jun. 27, 2015	Jun. 28, 2014
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs	$ 18.5	$ 17.8
Omega [Member]
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs			$ 387.0
Omega [Member] | Administration
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs			29.7
Omega [Member] | Interest expense, net [Member]
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs			23.7
Omega [Member] | Other expense, net [Member]
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs			324.0
Omega [Member] | Loss on extinguishment of debt
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs			$ 9.6
Elan Corporation [Member]
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs				$ 284.9
Elan Corporation [Member] | Administration
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs				108.9
Elan Corporation [Member] | Interest expense, net [Member]
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs				10.0
Elan Corporation [Member] | Other expense, net [Member]
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs				0.2
Elan Corporation [Member] | Loss on extinguishment of debt
schedule of acquisition expenses [Line Items]
Business combination, acquisition related costs				$ 165.8