Income Taxes Significant Differences Between U.S. Federal Statutory Rate and Effective Income Tax Rate (Detail)		12 Months Ended
Jan. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	21.00%	35.00%
State taxes, net of federal tax benefit		(0.50%)	0.90%	(0.50%)
Change in valuation allowance		1.90%	0.70%	(1.40%)
Impact of foreign earnings, net		(3.70%)	(0.30%)	(13.50%)
Global intangible low tax inclusion		1.80%	0.80%	0.00%
Change in U.S. federal statutory rate		0.00%	0.10%	(14.00%)
Transition tax on deferred foreign earnings		0	(0.053)	0.961
Subpart F income		0.60%	0.90%	2.00%
Undistributed earnings of foreign subsidiaries		0.00%	0.00%	(2.20%)
Stock-based compensation		(0.60%)	(0.70%)	(1.90%)
Depletion		(0.70%)	(0.60%)	(1.40%)
Revaluation of unrecognized tax benefits/reserve requirements		(2.70%)	0.00%	(0.70%)
Other items, net		(1.40%)	0.70%	(0.90%)
Effective income tax rate		15.70%	18.20%	96.60%

Effect of Revaluation of unrecognized tax benefits / reserve requirements on effective income tax rate reconciliation.

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Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Global Intangible Low Tax Inclusion, Percent

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the United States that are not subject to U.S. federal income taxes.

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Tax Cuts And Jobs Act Of 2017, Measurement Period Adjustment, Increase (Deccrease) In Effective Tax Rate

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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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Percentage 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 changes in the valuation allowance for deferred tax assets.

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Percentage 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 applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage 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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage 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 income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Percentage of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to increase (decrease) from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act.

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