Post Employment Plans - Net periodic pension cost (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Jun. 27, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	$ 2.2	$ 4.1	$ 0.9	[1]
Interest cost	1.7	3.6	2.4	[1]
Expected return on plan assets	(1.8)	(3.9)	(2.7)	[1]
Net actuarial loss	0.4	0.5	1.0	[1]
Net periodic pension cost	2.5	4.3	1.6	[1]
Postretirement Health Coverage [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	0.3	0.6	0.3	[1]
Interest cost	0.1	0.2	0.2	[1]
Expected return on plan assets	0.0	0.0	0.0	[1]
Net actuarial loss	0.0	0.0	0.1	[2]
Net periodic pension cost	$ 0.4	$ 0.8	$ 0.6	[1]

[1] Includes Omega activity from March 30, 2015 to June 27, 2015.

[2] *Includes Omega activity from March 30, 2015 to June 27, 2015.