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Commitments and Contingent Liabilities - Other (Details) - Threatened Litigation [Member] - USD ($)
$ in Millions
1 Months Ended 9 Months Ended 12 Months Ended
Dec. 28, 2014
Sep. 29, 2013
Sep. 29, 2013
Dec. 27, 2015
Loss Contingencies [Line Items]        
Demand for payment $ 34.0 $ 26.0    
Decline in contributions, percent     70.00%  
Payments made in accordance with ERISA       $ 11.6
Payments made in current period       $ 7.1