Income Taxes Significant Differences Between U.S. Federal Statutory Rate and Effective Income Tax Rate (Detail)		12 Months Ended
Jan. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	35.00%	35.00%
State taxes, net of federal tax benefit		0.90%	(0.50%)	(0.10%)
Change in valuation allowance		0.70%	(1.40%)	3.70%
Impact of foreign earnings, net		(0.30%)	(13.50%)	(19.30%)
Global intangible low tax inclusion		0.80%	0.00%	0.00%
Change in U.S. federal statutory rate		0.10%	(14.00%)	0.00%
Transition tax on deferred foreign earnings		(5.30%)	96.10%	0.00%
Subpart F income		0.90%	2.00%	0.20%
Undistributed earnings of foreign subsidiaries		0.00%	(2.20%)	0.10%
Stock-based compensation		(0.70%)	(1.90%)	0.00%
Depletion		(0.60%)	(1.40%)	(1.00%)
Revaluation of unrecognized tax benefits/reserve requirements		0.00%	(0.70%)	(0.40%)
Domestic manufacturing tax deduction		(0.00%)	(0.00%)	(0.90%)
Other items, net		0.70%	(0.90%)	1.40%
Effective income tax rate		18.20%	96.60%	18.70%

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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Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Transition Tax On Accumulated Foreign Earnings, 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 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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