Income Taxes (Details)	6 Months Ended
Jun. 30, 2018
Income Tax Contingency [Line Items]
Statutory rate	21.00%
Noncontrolling interests	(2.00%)
Foreign taxes not creditable against U.S. income tax	3.00%
Subpart F income	18.30%
Other	0.50%
Effective Income Tax Rate Reconciliation, Percent	15.90%
UNITED STATES
Income Tax Contingency [Line Items]
Income not subject to tax	(1.90%)
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Income not subject to tax	(23.00%)

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Name Accounting Standards Codification
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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 noncontrolling interest income (loss) exempt from income taxes.

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Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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