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Employee Benefit Plans - Target Asset Allocation of Plan Assets (Details) - Pension benefits
Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 100.00%
Money market funds  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 45.00%
Money market funds | Minimum  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 0.00%
Money market funds | Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 100.00%
Debt Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 55.00%
Debt Securities | Minimum  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 0.00%
Debt Securities | Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocation 100.00%