Share Plans - Share-based Compensation Cost by Award Type (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 27, 2015	Jun. 30, 2016	Jun. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$ 6.2	$ 9.7	$ 22.3	$ 19.4
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	3.6	6.3	10.6	12.5
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	1.8	3.4	7.2	6.9
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$ 0.8	$ 0.0	$ 4.5	$ 0.0