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Income Tax - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Dec. 28, 2019	Oct. 06, 2018	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Expense Benefit Continuing Operations [Line Items]
Federal statutory rate			21.00%	35.00%	35.00%
Provisional discrete income tax benefit, re-measurement of deferred income tax assets and liabilities				$ 26.0
Income tax benefit resulting from Tax Act		$ 0.5
Uncertain tax positions included in unrecognized tax benefits			$ 0.3
Effective income tax rate reconciliation, reduction resulting from lapse of statute of limitations			$ 1.0
Forecast [Member]
Income Tax Expense Benefit Continuing Operations [Line Items]
Impact of unrecognized tax benefits settlement on effective tax rate	$ 0.9

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- Definition

Effective income tax rate reconciliation, reduction resulting from lapse of statute of limitations.

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Income tax expense benefit continuing operations.

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- Definition

Amount of income tax expense for remeasurement of deferred tax asset from change in tax rate pursuant to Tax Cuts and Jobs Act.

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Tax cuts and Jobs act of 2017 change in tax rate income tax expense benefit.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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