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Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate to the Company's Effective Income Tax Rate for Continuing Operations (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Federal income tax at statutory rate (as a percent)	21.00%	35.00%	35.00%
State income tax provision (as a percent)	4.30%	16.30%	2.30%
Manufacturing & research incentives (as a percent)	2.40%	7.90%	2.00%
Taxes on foreign income which differ from the U.S. statutory rate (as a percent)	(3.20%)	41.50%	2.40%
Adjustments for unrecognized tax benefits (as a percent)	9.60%	0.50%	(4.00%)
Adjustments for valuation allowances (as a percent)	(1.80%)	287.70%	(69.80%)
Spin-off tax costs (as a percent)			(1.30%)
U.S. Tax Reform (as a percent)	2.50%	(228.30%)
Goodwill impairment (as a percent)	(24.60%)
Other items (as a percent)	(3.60%)	(35.40%)	(4.10%)
Effective tax rate (as a percent)	6.60%	125.20%	(37.50%)

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Effective income tax rate reconciliation, separation tax costs, 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 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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