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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

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Amount of unrecognized tax benefits.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019	Mar. 27, 2020
Income Tax Contingency [Line Items]
Effective income tax rate	(17.10%)	4.90%	(7.80%)	(9.30%)
Federal statutory income tax rate			21.00%	21.00%
Unrecognized Tax Benefits	$ 17.0		$ 17.0
Unrecognized tax benefits that would impact the provision for income taxes	$ 15.7		$ 15.7
Alternative Minimum Tax Credit Refund					$ 0.5
One foreign subsidiary
Income Tax Contingency [Line Items]
One-time benefit due to valuation allowance release				$ 0.8