Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019	Apr. 24, 2020
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ 0	$ 3	$ 0	$ 3
Employer matching contribution	11	13	34	38
Multiemployer plan contributions	$ 11	$ 10	$ 33	$ 28
Smart Foodservice
Defined Benefit Plan Disclosure [Line Items]
Smart Foodservice Benefit Obligation					$ 20

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

+ References

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-Publisher FASB
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Amount of cost for defined contribution plan.

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Amount of contributions made to multiemployer plan by employer.

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