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Pension and Other Postretirement Benefit Plans - Narrative (Details) - Pension
$ in Millions
6 Months Ended
Jun. 29, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Employer's contribution towards defined benefit plan $ 5.9
Minimum  
Defined Benefit Plan Disclosure [Line Items]  
Estimated employer's contribution towards defined benefit plan in current year 5.0
Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Estimated employer's contribution towards defined benefit plan in current year $ 10.0