Income Taxes (Reconciliation of the Company's Effective Tax Rate to the Statutory Federal Rate) (Details)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory taxes	21.00%	21.00%	35.00%
State income taxes, net of federal tax benefit	0.30%	0.70%	2.10%
Foreign operations	(5.80%)	(5.40%)	(20.00%)
Permanent differences	3.00%	2.00%	2.60%
The 2017 Tax Act - tax rate impact on deferred taxes	0.00%	(0.70%)	11.80%
The 2017 Tax Act - transition tax	0.00%	(3.50%)	66.30%
Tax reform - Switzerland	(48.20%)	0.00%	0.00%
Change in valuation allowance reserve	7.40%	0.40%	8.80%
Change in deferred tax liability related to acquired intangibles	0.00%	(0.10%)	0.30%
Tax credits	(8.40%)	(5.80%)	(7.60%)
Stock-based compensation	(1.90%)	(1.90%)	(3.60%)
Change in accruals for uncertain tax positions	(1.10%)	1.80%	0.30%
Other	(0.10%)	0.00%	0.00%
Effective income tax rate	(33.80%)	8.50%	96.00%

Effective Income Tax Rate Reconciliation, Change in Deferred Tax Liability, Acquired Intangibles, Percent

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Effective Income Tax Rate Reconciliation, Permanent Differences, Percent

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Effective Income Tax Rate Reconciliation, Tax Cut and Jobs Act of 2017, Impact on Deferred Taxes, Percent

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Effective Income Tax Rate Reconciliation, Tax Cut and Jobs Act of 2017, Transition Tax, Percent

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Effective Income Tax Rate Reconciliation, Tax Reform, Switzerland, Percent

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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 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 tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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