Post Employment Plans - Projected Benefit Obligation (Details) - USD ($) $ in Millions		6 Months Ended				12 Months Ended
		Dec. 31, 2015		Jun. 28, 2014		Jun. 27, 2015		Jun. 28, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning		$ 140.3				$ 89.0	[1]
Defined Benefit Plan, Service Cost		2.2				0.9	[1]	$ 0.0	[2]
Interest cost		1.7				2.4	[1]	1.4	[2]
Actuarial loss		10.1				6.8	[1]
Defined Benefit Plan, Benefits Paid		(0.6)				(0.1)	[1]
Defined Benefit Plan, Settlements, Benefit Obligation		0.0				0.0	[1]
Foreign currency translation		4.1				14.7	[1]
Projected benefit obligation, ending		135.0		$ 89.0	[1]	140.3		89.0	[1]
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning	[1]	133.3				99.6
Company's contributions to the plan		3.3				2.4	[1]
Defined Benefit Plan, Actual Return on Plan Assets		(0.6)				(1.0)	[1]
Defined Benefit Plan, Benefits Paid		(0.6)				(0.1)	[1]
Settlements		0.0				0.0	[1]
Fair value of plan assets, ending		134.9		99.6	[1]	133.3	[1]	99.6	[1]
Funded status recognized in Other Assets		(0.1)				(7.0)	[1]
Postretirement Health Coverage [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning		6.0	[1]			4.6	[1]	3.9
Defined Benefit Plan, Service Cost		0.3				0.3	[1]	0.5
Interest cost		0.1				0.2	[1]	0.3
Actuarial loss		0.5						0.0	[1]
Defined Benefit Plan, Benefits Paid		0.0						0.0	[1]
Defined Benefit Plan, Settlements, Benefit Obligation		0.0						0.0	[1]
Foreign currency translation		(0.1)						0.0	[1]
Projected benefit obligation, ending		7.0		4.6	[1]	6.0	[1]	4.6	[1]
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning	[1]	0.0						0.0
Company's contributions to the plan		0.0						0.0	[1]
Defined Benefit Plan, Actual Return on Plan Assets		0.0						0.0	[1]
Defined Benefit Plan, Benefits Paid		0.0						0.0	[1]
Settlements		0.0						0.0	[1]
Fair value of plan assets, ending		0.0				0.0	[1]
Funded status recognized in Other Assets				(4.6)		(6.0)	[1]	(4.6)
Ireland
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning		140.3	[1]			89.0	[2]	0.0	[2]
Defined Benefit Plan, Service Cost	[2]							0.0
Interest cost	[2]							1.4
Defined Contribution Plan, Employer Discretionary Contribution Amount		0.2				0.7		0.5
Actuarial loss	[2]							12.1
Defined Benefit Plan, Benefits Paid	[2]							(0.2)
Defined Benefit Plan, Settlements, Benefit Obligation	[2]							(8.0)
Foreign currency translation	[2]			0.7
Projected benefit obligation, ending				89.0	[2]	140.3	[1]	89.0	[2]
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning		133.3				99.6	[2]
Company's contributions to the plan	[2]							0.0
Defined Benefit Plan, Actual Return on Plan Assets	[2]							5.4
Defined Benefit Plan, Benefits Paid	[2]							(0.2)
Settlements	[2]							(12.1)
Fair value of plan assets, ending		$ 0.0	[2]	99.6	[2]	$ 133.3		99.6	[2]
Funded status recognized in Other Assets	[2]			$ 10.6				$ 10.6

[1] *Includes Omega activity from March 30, 2015 to

[2] **Includes Elan activity from December 18, 2013 to June 28, 2014.