Post Employment Plans - Weighted Average Assumptions (Details)	6 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Jun. 27, 2015
Pension plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	2.22%	1.91%	1.76%	2.11%
Inflation	2.25%	1.45%	1.43%	1.93%
Expected return on assets	2.93%	2.90%	2.89%	2.85%
Other Postretirement Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	4.25%	3.59%	4.00%	4.25%	[1]

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