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Pensions And Other Postretirement Benefits Target Allocation tables (Details) - Pension Plan [Member]	Dec. 31, 2017	Dec. 31, 2016
U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	100.00%	100.00%
U.S. [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	15.00%	15.00%
U.S. [Member] | Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	61.00%	61.00%
U.S. [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	24.00%	24.00%
Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	100.00%	100.00%
Non-U.S. [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	18.00%	21.00%
Non-U.S. [Member] | Debt [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	56.00%	51.00%
Non-U.S. [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations	26.00%	28.00%

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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

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(i)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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