Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of cost for defined contribution plan.

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Amount of contributions made to multiemployer plan by employer.

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Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement

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Percentage of employers matching contribution towards plan.

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Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	May 31, 2018	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Additional contribution to defined benefit and other post retirement plans				$ 70
Incremental to planned contributions				35
Reduction in benefit obligation	$ 33
Company's contributions to plan		$ 9	$ 9	$ 27	$ 26
Defined Contribution Plan 401K
Defined Benefit Plan Disclosure [Line Items]
Maximum Company matching contribution				4.00%
Company's contributions to plan		$ 11	$ 11	$ 36	$ 34
Defined Contribution Plan 401K \| First 3% of Participants Compensation
Defined Benefit Plan Disclosure [Line Items]
Matching contributions				100.00%
Participant's compensation for which company matches contribution				3.00%
Defined Contribution Plan 401K \| Next 2% of Participants Compensation
Defined Benefit Plan Disclosure [Line Items]
Matching contributions				50.00%
Participant's compensation for which company matches contribution				2.00%