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Income Taxes - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory U.S. federal income tax rate	21.00%	21.00%	35.00%
State income taxes, net of federal benefit	5.60%	0.60%	0.70%
Lower effective tax rate on international operations, net	22.70%	(3.80%)	(16.30%)
Depletion	4.00%	(0.50%)	(0.90%)
Exchange (gains) losses	5.60%	(0.30%)	0.60%
Provision to return and other adjustments	3.20%	(0.80%)	0.60%
Valuation allowance	(6.50%)	(1.30%)	(3.60%)
Net impact of U.S. tax reform	0.00%	(0.90%)	4.30%
Stock-based compensation	11.40%	(1.20%)	(2.20%)
Executive compensation limitation	(7.30%)	0.30%	0.70%
R&D credit	4.80%	(0.40%)	(0.10%)
Uncertain tax positions	(5.60%)	0.20%	(0.70%)
Other, net	(0.80%)	0.90%	0.00%
Total effective tax rate	58.10%	13.80%	18.10%

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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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