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Employee Benefit Plans (Details 3)
7 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 28, 2017
Dec. 29, 2016
May 28, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Discount rate 4.20% 4.15% 4.40% 4.30%
Rate of compensation increase 4.00% 4.00% 4.00% 4.00%