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Employee Benefit Plans (Asset Allocation) (Details) - Pension Benefits	Dec. 31, 2017	Dec. 31, 2016
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

Asset Category [Abstract]

+ References

No definition available.

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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

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