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Pension and Postretirement Benefit Obligations - Additional Information (Detail) - Pension Plans
6 Months Ended
Jun. 28, 2020
USD ($)
benefit_plan
Defined Benefit Plan Disclosure [Line Items]  
Company contribution to pension plans during the period $ 0
Number of company-sponsored pension plans | benefit_plan 2
Minimum  
Defined Benefit Plan Disclosure [Line Items]  
Benefit pension plan, contributions $ 8,000,000
Maximum  
Defined Benefit Plan Disclosure [Line Items]  
Benefit pension plan, contributions $ 12,000,000