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Income Taxes (Open Tax Years By Major Jurisdictions) (Details) | 12 Months Ended
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Dec. 31, 2018
Minimum | United States |
Income Tax Contingency [Line Items] |
Open tax year | 2016
Minimum | Germany |
Income Tax Contingency [Line Items] |
Open tax year | 2013
Minimum | Russia |
Income Tax Contingency [Line Items] |
Open tax year | 2015
Maximum | United States |
Income Tax Contingency [Line Items] |
Open tax year | 2018
Maximum | Germany |
Income Tax Contingency [Line Items] |
Open tax year | 2018
Maximum | Russia |
Income Tax Contingency [Line Items] |
Open tax year | 2018

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- Definition 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. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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Balance Type: | na
Period Type: | duration

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- Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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