Acquisitions Goodwill allocation (Details) - USD ($) $ in Millions	Dec. 31, 2015	Jun. 27, 2015	Jun. 28, 2014	Dec. 18, 2013	Jun. 29, 2013
Business Combination Segment Allocation [Line Items]
Goodwill	$ 5,364.9	$ 4,971.9	$ 3,474.1		$ 1,089.2
CHC [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	1,890.0	1,897.5	1,916.4		611.6
Rx
Business Combination Segment Allocation [Line Items]
Goodwill	1,222.2	1,233.6	1,258.3		385.4
Specialty Sciences [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	$ 200.7	$ 200.7	201.8		$ 0.0
Elan Corporation [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			$ 2,300.0	$ 2,333.1
Elan Corporation [Member] | CHC [Member]
Business Combination Segment Allocation [Line Items]
Goodwill				1,287.4
Elan Corporation [Member] | Rx
Business Combination Segment Allocation [Line Items]
Goodwill				845.1
Elan Corporation [Member] | Specialty Sciences [Member]
Business Combination Segment Allocation [Line Items]
Goodwill				$ 200.6