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Employee Benefit Plans (Asset Allocation) (Details) - Pension Benefits | Dec. 31, 2017 | Dec. 31, 2016
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Foreign Plan [Member] |  |
Asset Category |  |
Equity Securities | 100.00% | 100.00%
Foreign Plan [Member] | Equity Securities |  |
Asset Category |  |
Equity Securities | 40.00% | 39.00%
Foreign Plan [Member] | Fixed Income Securities |  |
Asset Category |  |
Equity Securities | 53.00% | 54.00%
Foreign Plan [Member] | Other Investments [Member] |  |
Asset Category |  |
Equity Securities | 7.00% | 7.00%
UNITED STATES |  |
Asset Category |  |
Equity Securities | 100.00% | 100.00%
UNITED STATES | Large and small cap domestic equity securities |  |
Asset Category |  |
Equity Securities | 31.00% | 29.00%
UNITED STATES | International equity securities |  |
Asset Category |  |
Equity Securities | 12.00% | 11.00%
UNITED STATES | Fixed Income Securities |  |
Asset Category |  |
Equity Securities | 43.00% | 42.00%
UNITED STATES | Other Investments [Member] |  |
Asset Category |  |
Equity Securities | 14.00% | 18.00%

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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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