Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	58.00%	27.00%	20.00%	25.00%
Federal corporate income tax rate (percent)	21.00%	21.00%	21.00%	21.00%
Income (loss) before income taxes	$ 21	$ 144	$ (269)	$ 389
Deferred tax asset expense			2
Tax expense (benefit) related to excess tax benefits associated with share-based compensation			$ 2	$ 3
Tax expense related to a change in valuation allowance		$ 2

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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